P about the assessment of marketers, when buying a gas boiler, people most often choose double-circuit wall boilers. Because a double-circuit wall-mounted gas boiler, firstly, does not take up space on the floor, and secondly, and this is the main advantage, the function of preparing hot water for household needs. The buyer does not need to additionally purchase any boiler or column. This is not necessary, because a double-circuit boiler performs two functions: heating water (and maintaining its set temperature) for the heating system and heating water for the hot water supply system (DHW).
Wall-mounted double-circuit gas boilers have a power range from 12 to 35 kW. A power of 35 kW is quite enough to heat rooms with an area of 350 - 400 sq.m. And in the preparation of hot water, a double-circuit gas boiler is in no way inferior to gas water heaters. Neither performance nor comfort. The capacity of the boilers is from 8 to 13 liters of hot water per minute. Double-circuit gas boilers are of two types: with a bithermic (“pipe in pipe”) heat exchanger and with separate heat exchangers (one for the heating system and the other for hot water). It must be said that replacing a bithermic heat exchanger is more expensive than replacing a DHW heat exchanger. This should also be taken into account when choosing a boiler. Like any other technique, gas boilers also “break”. By the way, the owner of the boiler should not forget about the annual after-sales service. And, as a rule, breakdowns happen at the most inopportune moment - during the heating season. And the worst thing is hard frost, and the service department is not coming to you for some reason. And if you come, then their services are not cheap. Therefore, if you feel the strength, capabilities and desire to figure out the device and the logic of your boiler yourself, we will help you with advice. And you may not always need a spare part to fix a breakdown.Don't panic, save money and figure it out...
And so, if you decide to repair the boiler yourself, you need to know the logic of its operation. The device of boilers of various trademarks similarly, we will consider everything using the example of the Ariston boiler (Ariston).
The device of a turbocharged (turbo) boiler with closed camera combustion (FF) - fig. one Main components:1 - air intakes for a dual system 
smoke removal / air supply;
2 - pneumatic relay (pressure switch);
3 - pneumatic relay condensate collector;
4 - overheating thermostat;
5 - main heat exchanger (heating heat exchanger);
6 - supply NTC1 sensor;
7 - burner with electrodes;
8 - gas valve / ignition device;
9 - DHW NTC sensor;
10 - relief (safety) valve, 3 bar;
11 - control panel;
12 - circulation pump;
13 - sensor NTC2 return (return);
14 - fan;
15 - holes for smoke analysis;
16 - exhaust manifold.
Deviceaatmospheric(atmo) boilerWithfromcovered combustion chamber (FROMF) — rice. 2
Main components:1 - exhaust hood; 
2 - thrust sensor;
3 - overheating thermostat;
4 - supply NTC1 sensor;
5 - burner with electrodes;
6 - gas valve and ignition device;
7 - NTC DHW sensor;
8 - relief (safety) valve, 3 bar;
9 - control panel;
10 - circulation pump;
11 - sensor NTC2 return (return);
12 - main heat exchanger.
The logic of the boiler in heating mode
Consider step by step the operation of the boiler, using detailed diagram his devices.
Command to turn on the boiler in heating mode
The command is given from the temperature sensor NTC1 (pos. 20, see diagram below) located on the boiler supply pipe. If you use additional equipment to control the operation of the boiler (timer, thermostat, room programmer, module remote control), then the command to turn on the heating is given by this device.
Consider the option when the command is given from the NTC1 sensor. At this moment, the actual coolant temperature determined by the sensor and the temperature set on the control panel are compared. And, if the actual temperature is less than the set one, the boiler starts the heating mode. The activation of the mode is accompanied by the indication of the LEDs on the front panel of the boiler or the appearance of information on the display (if your boiler has one).
In standby mode for turning on the heating, the three-way valve (pos. 10, see diagram below) is in the DHW position. That is, the outlet of the secondary DHW heat exchanger is open, and the inlet of the pump and the heating system is closed. At the moment the heating mode is turned on, voltage is applied to the contacts of the stepper motor, which changes the position of the three-way valve: the outlet from the secondary DHW heat exchanger is closed and the suction cavity of the pump with the heating system opens. The change in the position of the three-way valve does not occur instantly, but within 7 seconds after the command to turn on.
3. Turn on the pump
After the three-way valve is switched to heating mode, voltage is supplied to the circulation pump (pos. 7, see diagram below). And the pump begins to supply the coolant from the heating system to the main heat exchanger of the boiler.
4. Turn on the fan
The fan relay on the control board drives the fan (key 25, see diagram below) to operate.
The evacuation (removal) of possible remaining exhaust gases begins.
5. Control over the removal of exhaust gases
Scheme of boiler operation in heating mode
1 - pneumatic relay - pressure switch - smoke pressure switch; 2 - primary heat exchanger;
3 - temperature sensor - NTC2 return (return); 4 - volume compensator - hydraulic compensator - expansion tank;
5 - pressure gauge; 6 - automatic air vent - air vent;
7 - circulation pump; 8 - three-way valve drive;
9 - flow sensor; 10 - three-way valve;
11 - return valve - return - heating; 12 - cold water inlet valve;
13 - gas valve; 14 - hot water tap;
15 - tap input - supply - heating; 16 - secondary DHW heat exchanger;
17 - bypass; 18 - gas valve - gas fittings;
19 - overheating sensor; 20 - temperature sensor - NTC1 supply;
21 - burner; 22 - electrical block;
23 - flame control electrode - ionization; 24 - ignition electrode;
25 - fan - smoke exhauster.
6. Burner ignition
7. Flame control
8. Circulation control
9. Flame modulation
Modulation occurs within the maximum heating power (set on the control panel) and the minimum power set on the gas valve.
10. Superheat control
The logic of the boiler in hot water mode
Consider step by step the operation of the boiler, using the same scheme.
1. Switch on hot water preparation
Turning on the boiler in the DHW mode fixes the flow sensor (pos. 9, see the diagram above) and feeds it to the boiler control board.
2. Turn on the three-way valve
In standby mode, the three-way valve (pos. 10, see diagram above) is always in the DHW position. And if the inclusion in the DHW mode occurred when the boiler was operating in heating mode, then the three-way valve will move to the DHW position (DHW priority).
3. Turn on the pump
Voltage is applied to the contacts of the circulation pump (pos. 7, see the diagram above), it turns on and supplies the coolant from the secondary heat exchanger (pos. 16, see the diagram above) to the main one (pos. 2, see the diagram above).
4. Turn on the fan
The fan relay on the control board actuates the fan (pos. 25, see diagram above), and the pneumorelay - smoke pressure switch (pos. 1, see diagram above) monitors the efficiency of evacuation (removal) of exhaust gases (this happens in turbocharged boilers ).
5. Exhaust gas removal control
In turbocharged boilers with a closed combustion chamber, the efficiency of removing combustion products is “monitored” by a pneumatic relay (smoke pressure switch) (pos. 1, see diagram below). If everything corresponds to the norm, the contacts of the pressure switch close and a command is sent to ignite the burner. If not, then the operation of the boiler is blocked by the control board.
In atmospheric boilers with an open combustion chamber, the temperature draft sensor “monitors” the removal of combustion products. If suddenly it is cut off or triggered by overheating due to poor exhaust gases, then the control board also blocks the boiler. 6. Burner ignition After closing the contacts of the pressure switch, the gas valve (pos. 18, see the diagram above) is activated and passes the set amount of gas for smooth ignition. From the ignition coil, high-voltage pulses go to the ignition electrode (pos. 24, see diagram above). A spark jumps between the electrode contact and the burner body (pos. 21, see the diagram above) - the burner ignites. 7. Flame control The presence of the flame is controlled by the ionization electrode (pos. 23, see diagram above). It checks for the presence of an ionization current and if it is not present within 8 seconds, the boiler is blocked. The principle of flame control by ionization is based on the fact that when a gas is burned, many free electrons and ions are formed. These particles are "attracted" to the ionization electrode and cause the flow of an ionization current of tens of microamperes. If the flame goes out - the ionization intensity drops below a certain level, the burner turns off. The reason for the loss of ionization may be contamination or burning of the ionization (control) electrode. Another reason for the loss of the ionization signal may be a decrease in the resistance between the ionization electrode and the burner body due to the deposition of conductive dust. 8. Circulation controlCirculation is controlled by temperature sensors NTC1 at the supply (pos. 20, see diagram above) and NTC2 at the return pipeline - “return” (pos. 3, see diagram above). The temperature difference and rate of change are controlled. If these data are normal, the boiler continues to work, if not, the boiler is blocked.
9. Flame modulationAfter registering the flame, the boiler modulates. Modulation is an automatic smooth change in flame power gas burner depending on the heat demand this moment. This method of regulation is the most modern and economical.
Flame modulation provides comfort when using the DHW system, as it allows you to accurately maintain the water temperature set by the consumer. The power of the burner automatically adjusts to the heat output required for heating or hot water.Modulation occurs within the limits of the maximum power on the DHW and the minimum power (set on the gas valve).
10. Superheat control Overheating of the boiler is controlled by an overheating sensor (pos. 19, see diagram above). If the temperature on the sensor reaches 102 - 105 degrees. C - the boiler is blocked. Note: in boilers with a bithermic heat exchanger, there is no three-way valve. If the flow sensor (pos. 9, see the diagram above) detects the water supply, the boiler switches to the DHW mode. If the flow sensor does not detect the water supply, the boiler will operate in heating mode. Scheme of boiler operation in DHW mode
The logic of operation of boilers of different brands may vary slightly, but the basic principles are the same.
Focusing on which stage of operation the boiler enters into emergency mode, you can determine the possible cause of the malfunction and eliminate it yourself.
We wish you good luck!
Overview of the gas wall-mounted boiler Nova Florida Vela Compact
The double-circuit gas wall-mounted boiler Nova Florida Vela Compact with a sealed combustion chamber, forced smoke removal and stopped circulation is designed for heating and hot water supply for private and country houses.
Rice. 1 - Hydraulic diagram of the CTFS model
1. DHW temperature sensor, 2. Modulating gas valve, 3. Heating circuit temperature sensor, 4. Burner nozzles, 5. Burner, 6. Ignition/flame detection electrode, 7. Safety thermostat, 8. Bithermic heat exchanger, 9. Sealed combustion chamber, 10. Exhaust fan, 11. Flue gas pressure control point, 12. Air supply/flue gas pressure differential safety switch, 13. Air supply/flue gas coaxial pipe, 14. Combustion chamber air pressure control point, 15. Air outlet valve, 16. Domestic cold water inlet filter, 17. Expansion tank, 18. Circulation pump, 19. Make-up tap, 20. Min.
heating circuit, 21. Safety valve 3 bar, 22. DHW flow limiter - 10 liters per minute, 23. Domestic water flow sensor, M - Heating system supply, C - Domestic hot water outlet, G - Gas supply, F - Cold sanitary inlet water, R - Return from the heating system
The double-circuit gas wall-mounted boiler Nova Florida Vela Compact is equipped with a built-in atmospheric gas burner and is available in the following versions:
CTN 24 AF: open combustion chamber, natural exhaust of combustion products, electronic ignition, bithermic flow heat exchanger for domestic hot water;
CTFS 24 AF: closed combustion chamber, forced removal of combustion products, electronic ignition, bithermic flow heat exchanger for domestic hot water.
Both models are equipped with an ionization flame detection device.
Operating characteristics of boilers Nova Florida Vela Compact
Rated heat input (Qn) kW - 25.5 / 24.5
Rated useful heat output (Pn) kW - 23.7 / 22.2
Reduced input power (Qr) kW - 12.5 / 12
Reduced net power (Pr) kW - 11.2 / 10.8
Efficiency at 100% load % - 93 / 90.6
Efficiency at 30% load% - 90.2 / 90
Heating temperature control limits C - 35 - 78
Maximum heating circuit temperature C - 78 + 5
Maximum / minimum system pressure (PMS) bar - 3 - 0.5
Rated heat output in DHW mode (Qns) kW - 23.7 / 22.2
Reduced heat output in DHW mode (Qrs) kW - 12.5 / 12
DHW capacity (D) at t 30K l/min - 11.4 / 10.8
Maximum / minimum pressure in the DHW circuit bar - 8 - 0.5
DHW temperature control limits C - 35-50
Maximum DHW temperature C - 58
Height mm - 700
Width mm - 400
Depth mm - 250
Weight kg - 27.5 / 24.85
Gas connection - G1/2
Heating connection - G3/4
DHW connection - G1/2
NOx emission class - 3 / 2
Power supply voltage V - 230
Frequency in the mains Hz - 50
Power consumption W - 140 / 80
Electrical protection class - IPX4D
Design characteristics of the boiler Nova Florida Vela Compact
Copper bithermic heat exchanger with high efficiency.
Heating circuit circulation pump with built-in air vent.
Expansion tank with a capacity of 6 liters.
Minimum pressure switch in the heating circuit.
Flow sensor for DHW priority.
DHW flow limiter for 10 l/min.
Make-up tap and drain tap.
Temperature sensors for heating and hot water circuits.
Temperature limit safety thermostat.
Control panel with IPX4D electrical protection class.
Built-in electronic board for safety and flame modulation.
Electronic ignition and ionization control of the presence of a flame.
Combustion products differential pressure switch (CTFS).
Flue gas thermostat (CTN).
Modulating gas valve with double shut-off.
User control panel
Combined operating mode switch and heating circuit temperature controller (control range 35/78°C).
Combined release switch and DHW temperature controller (control range 35/58°C).
Heating circuit manometer.
Status light indication:
The presence of tension;
heating demand;
The presence of a flame;
Burner blocking;
Gas valve malfunction;
Burner blockage due to overtemperature;
Blockage of the burner due to the operation of the flue gas pressure switch (CTFS);
Burner blockage due to flue gas thermostat (CTN);
Insufficient coolant pressure in the heating circuit;
Damage to temperature sensors.
Working (operational) characteristics of boilers Nova Florida Vela Compact
DHW function priority.
Electronic flame modulation in heating mode with pre-calculated flame rise rate.
Electronic flame modulation in DHW mode.
Boiler anti-freeze function (On 5°C, Off : 30°C or after 15 minutes of operation).
Function of spread of a flame in the course of ignition (CTFS).
Time interval between burner starts (24 24 0 seconds at flow temperature > 40°C).
Pump post-circulation function in heating and anti-freeze modes (30 seconds).
DHW pump post-circulation function (6 seconds in winter mode, 1 second in summer mode).
Post-ventilation function in DHW mode and only when the unit is in summer mode (10 seconds - CTFS).
Protective function of ventilation after blocking the boiler due to a malfunction of the temperature sensors (1 minute - CTFS).
Function of anti-blocking of the circulation pump (30 seconds of operation of the pump after each 24 hours of inactivity of the device).
Malfunctions of the double-circuit gas wall-mounted boiler Nova Florida Vela Compact and the method of elimination
1) The boiler is blocked and the LED is red
a) The burner does not turn on
No gas - Check the gas pressure and the condition of the shut-off and safety valves.
Gas valve disconnected - Connect it.
Gas valve defective - Replace it.
b) The burner does not turn on: no spark
The control board does not ignite: it is defective - Replace the board.
c) The burner turns on for a few seconds and then turns off
The control board does not detect the presence of a flame: phase and neutral are reversed - Check the correct connection of phase and neutral.
Ignition/flame detection electrode wire disconnected/damaged - Connect or replace wire.
Ignition/flame detection electrode defective - Replace electrode.
The control board does not detect the presence of a flame: it is defective - Replace the board.
Ignition pressure too low - Increase it.
Minimum heat output set incorrectly - Check burner settings.
2) The Nova Florida Vela Compact boiler is blocked and the LED is yellow
a) Fan pressure switch (CTFS) not working
Pressure switch faulty - Check relay: replace if faulty.
Silicone tubing disconnected or damaged - Connect or replace silicone tubing.
There is not enough air supply or flue gas exhaust for combustion - Check the air supply and flue pipes: clean them or replace if necessary.
Fan defective - Replace it.
Control board defective - Replace it.
b) The flue gas thermostat (CTN) has tripped
Incorrect operation of the air supply / flue system - Check the chimney, ventilation ducts and grilles.
Flue gas thermostat defective - Replace it.
This state is exited by turning the knob to the “Unblock” position.
3) The boiler is blocked and the LED is red
a) The safety thermostat has tripped
There is no circulation in the heating system: system pipes are clogged, thermostatic valves or radiator valves are closed - Check the condition of the heating system.
Circulation pump blocked or defective - Check pump.
The boiler automatically returns to working condition after 10 seconds. or by turning the knob to the “Unlock” position.
4) LED flashes red
a) The temperature in the heating circuit has exceeded 85°C
- Insufficient circulation in the heating system - Check the circulation pump and the condition of the heating system.
The boiler automatically returns to working condition after the blocking causes are eliminated.
5) LED flashing yellow
a) Insufficient pressure in the heating system
Leaks in the heating system - Check the condition of the heating system.
Disconnected pressure switch - Connect the switch.
Defective pressure switch - Replace it.
The boiler automatically returns to working condition after the blocking causes are eliminated.
6) LED flashes yellow and red
Heating circuit temperature sensor disconnected - Connect it.
Faulty heating circuit temperature sensor - Replace it.
The Nova Florida Vela Compact boiler automatically returns to working condition after the causes of the blockage have been eliminated.
7) LED flashes green and red
a) Heating circuit temperature sensor not working
Disconnected DHW temperature sensor - Connect it.
Faulty DHW temperature sensor - Replace it.
The unit automatically returns to the working state after the elimination of the causes of blocking.
8) The DHW circuit of the boiler is not working
a) The flow sensor does not work
Insufficient pressure or flow in the DHW circuit - Check the DHW system and flow sensor filter.
Flow sensor defective or disconnected - Replace or connect it.
Flow sensor relay stuck - Replace it.
LED flashes green
a) Gas valve modulator not working
Connection between control board and gas valve broken or missing - Check gas valve connections.
Gas valve modulator coil defective - Replace gas valve modulator coil.
The unit automatically returns to the working state after the elimination of the causes of blocking.
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Operation of boilers Nova Florida Vela Compact
Boiler start-up Nova Florida Vela Compact
Before starting the Nova Florida Vela Compact boiler, make sure that:
The flue duct and the protruding part of the pipe are installed according to the instructions: when the device is turned on, there must be no leakage of combustion products through the seals;
The unit is connected to the mains with parameters of 230 V and 50 Hz;
The system is properly filled with coolant (pressure on the pressure gauge - 1-1.3 bar);
Possible shut-off valves in the pipes of the heating system are open;
The gas in the network corresponds to the gas to which the boiler is factory-set: otherwise, change the boiler to another gas.
The gas supply valve is open;
No gas leakage;
The external general switch installed in front of the boiler is switched on;
Safety valve 3 bar of the boiler is not blocked;
No coolant leaks;
The pump is not blocked.
Rice. 6 - Diagram of the control board
0SCHEMOD11: Electronic board
M3-M11: Line contacts, TA
M13: Telemetry control interface
M2-M12: Auxiliary contacts
E: Ignition and flame detection electrode
P: Circulation pump
V: Fan (only for TFS model)
TF: Flue gas thermostat (TN model only)
PV: Fan pressure switch (only for TFS model)
DK: Water pressure safety switch
SR: Heating sensor 10k Ohm 25 °C B=343 5
SS: DHW sensor 10k Ohm 25 °C B=343 5
TA: Room thermostat (option)
CM1-CM2: Jumpers for selecting boiler type / gas type
FL: Flow sensor
VG: Gas valve
TL: Limit thermostat
Boiler operation Nova Florida Vela Compact
Inclusion
The following procedures should only be carried out after the Nova Florida Vela Compact boiler has been installed, checked and certified by a qualified commissioner.
Open the gas shut-off valve.
Connect the power supply to the unit (the LED will turn green).
Select the boiler operating mode using the regulator.
Use the regulator to set the desired temperature of the coolant in the heating circuit.
Set the DHW temperature with the controller.
If you have a room thermostat, set it to the desired temperature in the room.
When requested by the heating system, the LED will turn green. When the flame appears, the LED will turn yellow.
When the boiler is switched on after long downtime, especially if it works on liquefied gas, it may be difficult to start the boiler.
In this case, before starting the boiler, turn on some other gas appliance (eg stove, oven, etc.). Even after such actions, the device may be difficult to start and block once or twice. Unlock by turning the knob to position for a few seconds.
Operation of Nova Florida Vela Compact boilers
To prevent too frequent switching on and off in heating mode, the boiler maintains a four-minute pause between switching on.
However, if the temperature in the heating system drops below 40°C, the pause between switching on will be canceled and the device will turn on as needed.
The boiler electronics always give priority to domestic hot water over heating.
The domestic hot water temperature can be set between 35°C and 58°C.
The temperature of the heat carrier in the heating system can be set in the range from 35°C to 78°C.
The Nova Florida Vela Compact boiler is equipped with a sanitary hot water flow limiter, which allows a maximum of 10 liters per minute to be obtained.
The hot water capacity depends on the heat output and the temperature difference to which the machine heats the water.
The appliance is equipped with an anti-freeze protection system, which is disabled when the boiler is in standby mode.
When the temperature sensor in the heating circuit detects a temperature of 5°C, the appliance turns on at minimum power and operates for 15 minutes or until the temperature rises to 30°C. When it turns off, the pump still continues to work.
The anti-freeze function only protects the unit and not any other components of the heating system.
Protection of the heating system can be ensured by using a room thermostat, however, do not forget that when the boiler is set to standby room thermostat turns off.
The heating system can be effectively protected from freezing by using special antifreeze products suitable for heating systems with different types structural metals. Do not use automotive antifreeze and check the effectiveness of the product periodically.
If the unit is idle but connected to the mains, the pump is turned on for 30 seconds every 24 hours to prevent jamming.
Boiler blocking Nova Florida Vela Compact
When abnormal conditions are created during the operation of the Nova Florida Vela Compact boiler, it is automatically blocked.
Depending on the reason for blocking, proceed as described below.
Burner lockout
When the burner locks out, LED 2 (Fig. 1) lights up red.
If this happens, proceed as follows:
Check if the gas valve is open and if there is gas in the line (by turning on the stove, for example).
After making sure that gas is flowing, unblock the burner by turning the knob to position for a few seconds. If the boiler does not turn on and locks up again on the third try, contact qualified specialist.
If the burner locks up frequently, indicating a permanently recurring malfunction, you should contact the Service Center for maintenance.
Overheat lockout
When overheating occurs in the heating system, the LED indicator flashes red.
Blocking in case of insufficient pressure in the system
In the event of blocking of the Nova Florida Vela Compact boiler due to the operation of the pressure switch, the LED indicator flashes yellow.
Feed the heating system through the make-up cock located at the bottom next to the hydraulic connections.
The pressure in the heating system (when cold) should be 1 - 1.3 bar.
To restore pressure in the heating system, proceed as follows:
Open the system feed valve by turning it counterclockwise and keep it open until the pressure gauge shows a pressure of 1-1.3 bar.
Close the system feed valve by turning it clockwise.
If the boiler is often blocked for this reason, this indicates a violation in the heating system.
When the make-up of the system is completed, carefully and carefully close the make-up cock. If the make-up valve is not completely closed, this may increase the pressure in the heating system, which will lead to the operation of the boiler safety valve and possible splashing of water from it.
Blocking in case of violations in the chimney / air supply system
In the event of conditions that cause abnormal operation of the chimney or air supply, the boiler is blocked.
When the boiler is blocked due to violations in the chimney / air supply system, the LED indicator lights up in yellow.
Blocking in case of failure of temperature sensors
If the device is blocked due to malfunctions of the temperature sensors, the LED indicator flashes as follows:
Yellow/red for heating circuit temperature sensor;
Red/green for DHW temperature sensor.
Maximum Power Adjustment
Check the gas pressure value at the inlet;
Remove the plastic cap located on the modulator bobbin, which protects the adjusting screws of the pressure regulator;
Connect a micromanometer to the IN port to check the gas valve inlet pressure or to the OUT port to check the burner pressure;
Turn the regulator on the control panel clockwise until it stops and open one or two hot water taps so that the Nova Florida Vela Compact boiler operates at maximum power;
To INCREASE burner pressure, turn the brass nut clockwise and to DECREASE pressure, turn it counterclockwise.
For LPG operation, turn the brass nut clockwise until it stops.
Rice. 7 - Gas valve adjustment
Minimum power adjustment
Remove the connector from the regulator bobbin);
Switch on the burner and check if the minimum pressure corresponds to the set value;
Using a 10 mm wrench, while holding the nut in a fixed position, turn the plastic screw clockwise to increase pressure and counterclockwise to decrease pressure.
Put the connector on the modulator bobbin.
Final operations
Turn on the boiler and check the correctness and noiselessness of the ignition of the burner;
Check again the maximum and minimum pressure on the gas valve;
If necessary, adjust it;
Replace the protective plastic cap;
Close gas pressure measuring points;
Check for gas leaks.
What to check:
General condition of the device;
tightness gas system boiler and gas supply lines to the boiler;
Gas pressure at the inlet to the apparatus;
Minimum and maximum pressure on the burner;
Turning on the boiler;
Combustion parameters through gas analysis;
Integrity, degree of wear and tightness of chimney pipes;
Operation of the traction interruption device (CTN);
No leakage of flue gases into the room and correct operation of the chimney (CTN);
Correct operation of the flue gas safety thermostat (CTN);
Operation of the fan pressure switch (CTFS);
The overall integrity of all boiler safety devices;
No water leaks and oxidation of compounds in the boiler;
work safety valve systems;
Expansion tank pressure;
The operation of the pressure switch in the system.
Boiler cleaning operations Nova Florida Vela Compact:
General cleaning of the interior of the unit;
Cleaning of gas nozzles;
Cleaning of air intake and exhaust pipes (CTFS);
Cleaning the traction interruption device (CTN);
Cleaning of ventilation grilles in the room where the boiler is installed (CTN);
Cleaning the outside of the heat exchanger;
When performing the first maintenance, also check:
The suitability of the premises for the installation of the boiler;
Ventilation ducts in the room where the boiler is installed (CTN);
Chimney pipes, their diameters and length;
Correct installation of the boiler according to the instructions given in this manual.
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P about the assessment of marketers, when buying a gas boiler, people most often choose double-circuit wall-mounted boilers. Because a double-circuit wall-mounted gas boiler, firstly, does not take up space on the floor, and secondly, and this is the main advantage, the function of preparing hot water for household needs. The buyer does not need to additionally purchase any boiler or column. This is not necessary, because a double-circuit boiler performs two functions: heating water (and maintaining its set temperature) for the heating system and heating water for the hot water supply system (DHW).
Wall-mounted double-circuit gas boilers have a power range from 12 to 35 kW. A power of 35 kW is quite enough for heating rooms with an area of 350 - 400 sq.m. And in the preparation of hot water, a double-circuit gas boiler is in no way inferior to gas water heaters. Neither performance nor comfort. The capacity of the boilers is from 8 to 13 liters of hot water per minute. Double-circuit gas boilers are of two types: with a bithermic (“pipe in pipe”) heat exchanger and with separate heat exchangers (one for the heating system and the other for hot water). It must be said that replacing a bithermic heat exchanger is more expensive than replacing a DHW heat exchanger. This should also be taken into account when choosing a boiler. Like any other technique, gas boilers also “break”. By the way, the owner of the boiler should not forget about the annual service. And, as a rule, breakdowns happen at the most inopportune moment - during the heating season. And the most unpleasant thing is in severe frost, and for some reason the service department does not come to you. And if you come, then their services are not cheap. Therefore, if you feel the strength, capabilities and desire to figure out the device and the logic of your boiler yourself, we will help you with advice. And you may not always need a spare part to fix a breakdown.Don't panic, save money and figure it out...
And so, if you decide to repair the boiler yourself, you need to know the logic of its operation. The device of boilers of various brands is similar, we will consider everything using the example of the Ariston boiler (Ariston).
The device of a turbocharged (turbo) boiler with a closed combustion chamber (FF) - fig. one Main components:1 - air intakes for a dual system
smoke removal / air supply;
2 - pneumatic relay (pressure switch);
3 - pneumatic relay condensate collector;
4 - overheating thermostat;
5 - main heat exchanger (heating heat exchanger);
6 - supply NTC1 sensor;
7 - burner with electrodes;
8 - gas valve / ignition device;
9 - DHW NTC sensor;
10 - relief (safety) valve, 3 bar;
11 - control panel;
12 - circulation pump;
13 - sensor NTC2 return (return);
14 - fan;
15 - holes for smoke analysis;
16 - exhaust manifold.
Deviceaatmospheric(atmo) boilerWithfromcovered combustion chamber (FROMF) - rice. 2
Main components:1 - exhaust hood; 
2 - thrust sensor;
3 - overheating thermostat;
4 - supply NTC1 sensor;
5 - burner with electrodes;
6 - gas valve and ignition device;
7 - NTC DHW sensor;
8 - relief (safety) valve, 3 bar;
9 - control panel;
10 - circulation pump;
11 - sensor NTC2 return (return);
12 - main heat exchanger.
The logic of the boiler in heating mode
Consider step by step the operation of the boiler, using a detailed diagram of its device.
Command to turn on the boiler in heating mode
The command is given from the temperature sensor NTC1 (pos. 20, see diagram below) located on the boiler supply pipe. If you use additional equipment to control the operation of the boiler (timer, thermostat, room programmer, remote control module), then the command to turn on the heating is given by this device.
Consider the option when the command is given from the NTC1 sensor. At this moment, the actual coolant temperature determined by the sensor and the temperature set on the control panel are compared. And, if the actual temperature is less than the set one, the boiler starts the heating mode. The activation of the mode is accompanied by the indication of the LEDs on the front panel of the boiler or the appearance of information on the display (if your boiler has one).
In standby mode for turning on the heating, the three-way valve (pos. 10, see diagram below) is in the DHW position. That is, the outlet of the secondary DHW heat exchanger is open, and the inlet of the pump and the heating system is closed. At the moment the heating mode is turned on, voltage is applied to the contacts of the stepper motor, which changes the position of the three-way valve: the outlet from the secondary DHW heat exchanger is closed and the suction cavity of the pump with the heating system opens. The change in the position of the three-way valve does not occur instantly, but within 7 seconds after the command to turn on.
3. Turn on the pump
After the three-way valve is switched to heating mode, voltage is supplied to the circulation pump (pos. 7, see diagram below). And the pump begins to supply the coolant from the heating system to the main heat exchanger of the boiler.
4. Turn on the fan
The fan relay on the control board drives the fan (key 25, see diagram below) to operate.
The evacuation (removal) of possible remaining exhaust gases begins.
5. Control over the removal of exhaust gases
Scheme of boiler operation in heating mode
1 - pneumatic relay - pressure switch - smoke pressure switch; 2 - primary heat exchanger;
3 - temperature sensor - NTC2-return (return); 4 - volume compensator - hydraulic compensator - expansion tank;
5 - manometer; 6 - automatic air vent - air vent;
7 - circulation pump; 8 - three-way valve drive;
9 - flow sensor; 10 - three-way valve;
11 - return valve - return - heating; 12 - cold water inlet valve;
13 - gas valve; 14 - hot water tap;
15 - tap input - supply - heating; 16 - secondary DHW heat exchanger;
17 - bypass; 18 - gas valve - gas fittings;
19 - overheating sensor; 20 - temperature sensor - NTC1 supply;
21 - burner; 22 - electrical block;
23 - flame control electrode - ionization; 24 - ignition electrode;
25 - fan - smoke exhauster.
6. Burner ignition
7. Flame control
8. Circulation control
9. Flame modulation
Modulation occurs within the maximum heating power (set on the control panel) and the minimum power set on the gas valve.
10. Superheat control
The logic of the boiler in hot water mode
Consider step by step the operation of the boiler, using the same scheme.
1. Switch on hot water preparation
Turning on the boiler in the DHW mode fixes the flow sensor (pos. 9, see the diagram above) and feeds it to the boiler control board.
2. Turn on the three-way valve
In standby mode, the three-way valve (pos. 10, see diagram above) is always in the DHW position. And if the inclusion in the DHW mode occurred when the boiler was operating in heating mode, then the three-way valve will move to the DHW position (DHW priority).
3. Turn on the pump
Voltage is applied to the contacts of the circulation pump (pos. 7, see the diagram above), it turns on and supplies the coolant from the secondary heat exchanger (pos. 16, see the diagram above) to the main one (pos. 2, see the diagram above).
4. Turn on the fan
The fan relay on the control board actuates the fan (pos. 25, see diagram above), and the pneumorelay - smoke pressure switch (pos. 1, see diagram above) monitors the efficiency of evacuation (removal) of exhaust gases (this happens in turbocharged boilers ).
5. Exhaust gas removal control
In turbocharged boilers with a closed combustion chamber, the efficiency of removing combustion products is “monitored” by a pneumatic relay (smoke pressure switch) (pos. 1, see diagram below). If everything corresponds to the norm, the contacts of the pressure switch close and a command is sent to ignite the burner. If not, then the operation of the boiler is blocked by the control board.
In atmospheric boilers with an open combustion chamber, the temperature draft sensor “monitors” the removal of combustion products. If suddenly it is cut off or triggered by overheating due to poor exhaust gases, then the control board also blocks the boiler. 6. Burner ignition After closing the contacts of the pressure switch, the gas valve (pos. 18, see the diagram above) is activated and passes the set amount of gas for smooth ignition. From the ignition coil, high-voltage pulses go to the ignition electrode (pos. 24, see diagram above). A spark jumps between the electrode contact and the burner body (pos. 21, see the diagram above) - the burner ignites. 7. Flame control The presence of the flame is controlled by the ionization electrode (pos. 23, see diagram above). It checks the presence of the ionization current and if it is not present within 8 seconds, the boiler is blocked. The principle of flame control by ionization is based on the fact that when a gas is burned, many free electrons and ions are formed. These particles are "attracted" to the ionization electrode and cause the flow of an ionization current of tens of microamperes. If the flame goes out - the ionization intensity drops below a certain level, the burner turns off. The reason for the loss of ionization may be contamination or burning of the ionization (control) electrode. Another reason for the loss of the ionization signal may be a decrease in the resistance between the ionization electrode and the burner body due to the deposition of conductive dust. 8. Circulation controlCirculation is controlled by temperature sensors NTC1 at the supply (pos. 20, see diagram above) and NTC2 at the return pipeline - “return” (pos. 3, see diagram above). The temperature difference and rate of change are controlled. If these data are normal, the boiler continues to work, if not, the boiler is blocked.
9. Flame modulationAfter registering the flame, the boiler modulates. Modulation is an automatic smooth change in the power of the flame of a gas burner, depending on the need for heat at the moment. This method of regulation is the most modern and economical.
Flame modulation provides comfort when using the DHW system, as it allows you to accurately maintain the water temperature set by the consumer. The power of the burner automatically adjusts to the heat output required for heating or hot water.Modulation occurs within the limits of the maximum power on the DHW and the minimum power (set on the gas valve).
10. Superheat control Overheating of the boiler is controlled by an overheating sensor (pos. 19, see diagram above). If the temperature on the sensor reaches 102 - 105 degrees. C - the boiler is blocked. Note: in boilers with a bithermic heat exchanger, there is no three-way valve. If the flow sensor (pos. 9, see the diagram above) detects the water supply, the boiler switches to the DHW mode. If the flow sensor does not detect the water supply, the boiler will operate in heating mode. Scheme of boiler operation in DHW mode
The logic of operation of boilers of different brands may vary slightly, but the basic principles are the same.
Focusing on which stage of operation the boiler enters into emergency mode, you can determine the possible cause of the malfunction and eliminate it yourself.
We wish you good luck!
The huge popularity that Nova Florida gas boilers have is ensured by: a wide range of equipment performance, the ability to select the required configuration, small size and attractive cost. All this explains why Nova Florida heating equipment is so popular with the domestic consumer.
Types of gas equipment
Nova Florida manufactures several types heating equipment, accessories for the installation of a heating system, as well as all the necessary components for the operation of boilers. All products can be divided into the following types:
Start-up and adjustment of all equipment should be carried out by a specialized team. After the work is completed, the boiler is put under warranty.
Mounted boiler equipment
The hinged gas heating boiler Nova Florida has several dozen modifications. To facilitate the selection of a suitable model, you can pay attention to the following:
If necessary, the boiler can be adjusted remotely using a remote control or a GSM notification.
Floor type boilers
Gas floor standing boilers heating Nova Florida can also be divided into several categories depending on the technical device of the design:
All models of Nova Florida heating boilers support the ability to connect an external thermostat and room temperature sensors. Their installation ensures the optimization of the heating operation.
Installation and commissioning
During the installation of Nova Florida boilers, it is necessary to observe general rules safety regarding installation gas equipment. In this case, some features and characteristics of the technique should be taken into account:
When choosing, first of all, you should be guided by the required power of the device. You can calculate performance using a simple calculation:
1 kW =10 m²
You should also take into account the principle of operation of the equipment. Atmospheric boilers are less whimsical in operation and more reliable, but have a higher gas consumption. Condensation requires fine tuning, but can reduce fuel costs by up to 30%.
The cost of the Nova Florida boiler in the basic configuration is quite attractive for the price segment in which it is located. For a relatively small price, productive equipment is provided with all the functions necessary for heating and hot water supply.
The gas wall-mounted boiler Nova Florida Vela CTFS 24 AF cannot start. If we press the on / off button, the burner operates. If the button is pressed, the unit will shut down. Explain the cause of the problem?
The thermoelectric converter or the gas valve may be faulty. There may also be a decrease in gas pressure in the inlet pipeline. Sometimes there is a lack of voltage on the control board.
There was a problem recently. Turning on is very poor. The pilot burner ignites, but there is no flame on the main gas burner equipment. Can anyone explain what is the reason?
Most likely, a malfunction of the ignition mechanism. You need to service the boiler and clean the igniter.
Why does the double-circuit boiler Nova Florida Vela Compact not stop working when the desired temperature is set? It heats up to 85C, then it fails. The restart operation repeats everything.
Presumably, the electronic board is not in order, the temperature sensor is broken, the overheat protection button has a problem. It cannot be ruled out that an error has occurred in the automation adjustments.
Please tell me why it is not possible to raise the temperature of the coolant above 70 C? We need to increase the temperature, and the screen shows that this is the maximum. How to adjust the heat?
If the appliance cannot raise the temperature in the heating circuit, the following causes are possible. In the given adjustments, a limit is set for the highest heating temperature not higher than 70C. There is a decrease in the draft speed in the chimney channel.
The wall-mounted boiler Nova Florida Delfis performs unstable functions in the heating mode of the DHW system. From the tap can go alternately hot water, then cold. Tell me what's the reason?
Sources of failure may be the following. Cold water may be mixed in because the 3-way valve is damaged. The heat exchanger is clogged with dirt. It needs to be cleaned.
Water leaks regularly from the tap at the bottom of the boiler. The unit itself cannot be started. What needs to be done?
Apparently, there is a coolant discharge through the protection valve. This factor indicates an increase in pressure in the system. Also, the filling valve of the system may not be closed or it may be necessary to pump the expander tank.
I would like to know what kind of malfunction happens when the pressure continuously increases and the water relief valve starts to work? The display shows the heating symbol each time the unit is heated. What could be?
There is damage to the temperature sensor of the heating circuit. The coolant does not circulate well in the heating system.
Why did the Nova Florida gas boiler periodically turn off? Let's say the other day the piezo ignition didn't work at all. The instrument was serviced two weeks ago. What's the matter?
We can assume that there were functional violations in the chimney device. You must perform a chimney check. The inoperability of the piezo ignition will mean a breakdown of its component in the event of a voltage drop or water has flowed into it.
Can you help me with the chimney please? Soon the second day, as there is a return draft, while the smoke began to fall directly into the room. The chimney was made by myself. It is a steel pipe. Maybe there are omissions somewhere.
The device does a good job of heating hot water, and when heating is started, the water immediately comes to a boil, and the unit goes into an accident. What could be wrong, and how to fix it?
Probably, the circulation pump is faulty, the control board is damaged, the temperature sensor is broken. The filter screen may also become clogged with debris.
In the DHW cycle, the unit alternately starts to produce either cold or hot water. I can't figure out what is causing this. How to adjust the heating of water yourself?
Apparently, there is dirt in the heating system or the heat exchanger needs to be cleaned. It is also possible that the pressure control switch is broken or the circulation pump is faulty.
main reason may be an incorrectly made chimney design. There may be soot contamination, which drastically reduces its performance. In addition, be sure to check the hood in the room.
We launched the wall-mounted boiler Nova Florida CTN 24. The unit immediately raises the temperature above 96 degrees, but then stops working with overheating. Later, when it cools, it starts to start on its own. What does it depend on?
The suspension of work on overheating indicates a circulation problem in the system. First of all, it is recommended to control the position of the taps on the radiators. They must be left open. Next, an inspection is carried out for filter clogging, and it is also recommended to make sure that the heat exchanger does not contain scale.
Completed the installation of this model in March. Presumably after five months, the device suddenly began to make a lot of noise. Can you please tell me what is causing the noise?
There may be scale in the heat exchanger. When the water is hard, then limescale will be deposited in the radiator pipes in the future.
We would like to connect a gas boiler Nova Florida Vela Compact in a country house. Could you tell me how to properly put this device into operation?
For the correct start-up of this equipment, certain actions must be taken. Turn on the power supply of the device. We open the gas valve. Then we start the gas burner equipment. Then adjust the desired temperature.
We need to do some maintenance. Instruct how to correctly drain the water from the unit?
According to instructions, this work produced in the following way. Disconnect the unit from electrical network. Close the gas valve. Open the automatic air vent. Open the drain valve fully. Then clean up spilled liquid. If necessary, the water can be drained through the relief valve. This component is located at the bottom of the boiler device.
Can you please tell us how to diagnose the operation of a 3-way valve? I think it doesn't complete the opening. In the heating mode, it does not pump out the outer radiators, however, in the DHW mode, the pipe is heated for the supply of heating water under the boiler unit.
Of course, it is necessary to inspect the 3-way valve for the presence of poor stroke of its stem in the intermediate state. We also recommend checking your heating system.
We use the floor boiler Nova Florida Altair in the house. Up to this day it worked without problems. Now after five seconds after turning it on, it began to go out.
It seems that it cannot force fluid into the system. Tell me what's wrong? A possible factor in this malfunction may be an ignition electrode that does not fix the flame, or a lack of circulation.
I recently had a problem with this unit. While working, he began to whistle. I tried restarting - it worked, but there was no change. Tell me, what is the reason for the whistle?
In many cases, a sharp whistle occurs when the pressure on the burner nozzles is incorrectly set. It is necessary to check the set value and correct, if appropriate.
Water has recently been poured into the boiler, and the unit began to function with delays. For example, we set any temperature, but the heating mode occurs only up to 26 degrees, and then the device turns off. Explain what happened?
If the block of the electronic board was flooded with water, it can be assumed that it is faulty. It is necessary to reboot it using a direct disconnection of the device from the mains. Then re-launch and test its functionality.
I have a Nova Florida Vela Compact 24 boiler installed. Now, at the start, the wick lights up for 9 seconds, but the main burner does not catch fire, which is why the device starts to fade. How can I fix the breakdown?
Based on your words, the ignition unit or a problem with the burner failed. Just in case, you need to see if the phasing is correct when connected to the electrical network.
I completed the installation of the same model myself in early August. Somewhere after three months, the hot water supply stopped working, although the heating circuit is operating as expected. I tried to turn on hot water, but the device only displays the temperature, and does not even think about heating. Tell me what's the reason?
Most likely, the 3-way valve is faulty. It needs to be changed.
Explain why the boiler is equipped with a protective temperature sensor?
The temperature sensor stops the flow of gas to the burner in case of overheating of the water in the primary system.
I need to flush and clean the main water heat exchanger. Can you tell me how to properly remove this component?
This element can be easily removed from the device using a standard screwdriver. Here is the disassembly process. Drain the water from the machine using the drain cock. Then you need to empty the hot water system. Unscrew the fixing screws of the main heat exchanger and remove it from the frame.
They connected the unit of just such a model. After about a few months, the water pressure in it dropped. Often he throws it off and stops. That is, it does not hold pressure at all. What is the reason?
If the machine does not increase water pressure, it can be assumed that there is a leak from the feed tap. When a shutdown occurs and the pressure drops to zero, the 3-way valve is damaged.
Tell me how to clean the cold water filter?
First, it is necessary to free the hot water supply system from water. Second, unscrew the flow sensor nut. Then we dismantle the sensor together with the filter from the socket. After removal, clean from debris and dirt.
The unit was buzzing at startup before, but now the noise has intensified. Initially, the sound quickly disappeared, but now it is heard longer. arose briefly, met with this problem?
The appearance of extraneous roar can be explained by the presence of lime scale inside the heat exchanger housing, the heating of which proceeds unevenly due to different wall thicknesses. The stronger the heat exchanger is clogged, the stronger the roar, and, accordingly, the heat transfer decreases.
The device is functioning, but there is clearly no water circulating in the system. Very hot return pump. What could have happened?
Most likely, the mud filter is clogged or a tap is closed somewhere, which blocks the movement of the coolant. The circulation pump could still break.
Why can't mountains warm up? water? The tap water is barely warm. Help me understand what happened?
Troubleshooting can be done in several ways. For example, a malfunction of the DHW temperature sensor, you need to replace it. It is possible that the power adjustments for DHW heating have gone astray.
Periodically, we notice a break in the spark during ignition. The burner is clean, the chimney is in order, the draft is good. Where to look for a problem?
The device does not register a spark due to poor notification from the combustion control unit. It is necessary to inspect the wire from the ionization sensor to the electrode. Probably needs to be tightened up. There may be a defect in the sensor insulation, which must be replaced.
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There was a problem after starting. It doesn’t want to turn on, it worked for two years, now the whole display lights up as if the boiler was turned on, when the self-diagnosis mode is on, then it clicks, turns off for miles and seconds and turns on the entire display again. It turned on once, but gives an error E10 water pressure, although the pressure in the system is 1.5 atm. Tell me what can be?
Bosch 6000 24 kW boiler, single-circuit with built-in three-way valve. Does not see the boiler sensor, gives an error. Tell me how to make it not give an error and work normally both for heating and for the boiler?
Installed boiler Arderia esr 2.13 ffcd. If my coolant pressure drops a little in 2-3 days by a couple of divisions, can the three-way valve malfunction be the reason (there are no leaks from the radiators)?
In operation, the gas boiler Arderia 2.35. Tell me about power reduction. Heard something about modulation, fan speed and so on. Is it really possible to reduce power?
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We installed and connected the Buderus Logano G234-WS-44 kW boiler, Logomatic 4211 automation. Heating on cylinders without hot water supply, jets for reduced gas were also replaced. We survived the winter, the cylinders were replaced, all without problems. Then in the spring, when the temperature outside was +16 + 18, the boiler began to turn off for a long time and, when turned on, it began to give a burner error on the screen and a red button light on the front wall lit up. We pressed the button, turned on the power again and everything worked. It happened several times, then the boiler was completely turned off for the summer, what could be the problem?
In a single-circuit Buderus 072, is the BKN coil circuit heated by the same heat exchanger as for heating or the same as on a 2-circuit one that is used for hot water supply?
Tell me, for Vaillant wall-mounted gas boilers, are there any real / actual differences in better side in the new generation of turboTEC plus VU/5-5 compared to /3-5?
Malfunction of the boiler, the green LED (power) flashes, the instructions say that it worked thermal protection, the green indicator blinks even if nothing is connected to the board. How to fix? I checked all SMD resistors and transistors, everything is in order.
In operation, a double-circuit gas boiler Daewoo Gasboiler with an electronic panel. When the hot water supply is turned on, the heating is heated, the operating mode is summer. Removed the three-way valve, there is no dirt and no production. It seems that the board does not control the three-way valve. How to check?
Installed and connected wall-mounted boiler Electrolux Basic Xi. A problem began that the boiler stopped seeing the flame and turned off the gas supply after 7-8 seconds. And after 3 attempts gave an error E1. How can I fix it?
Koreastar boiler malfunction. Heating works fine, hot water is intermittent, when you turn on the hot water tap, it first goes cold water, then boiling water. After a few seconds, cool, then again boiling water. What could be the problem?
Malfunction of the ferroli domiproject 24 boiler - I set it to 60-70 degrees, it switches to minimum combustion, does not turn on, does not turn off. Restart is unstable. No pattern emerges. What to do?
In operation, the Junkers euroline gas boiler, when hot water is turned on, ignites the gas, then goes out and so on several times. If you turn it on while the heating is running, then the water heating turns on immediately. Tell me, please, what could be the problem?
Tell me about the adjustments of the gas boiler Navien Ace 16 turbo remote control v1.3. Unable to adjust fan overrun. I put 30 seconds, but still 2 minutes. turns.
Malfunction of the boiler Oasis ZRT18. The unit starts, gas lights up, then goes out. It lights up again, goes out (it happens three times). Then it fires up and works fine. Doesn't throw any error. What is the reason?
Malfunction of the gas boiler Senor Duval - the water pressure sensor shows 0.0, the indicator flashes red, hot water is not heated, but the water pressure in the apartment is good. How to troubleshoot?
Where should the steam trap be installed in the coaxial chimney? Boiler wh1d with a closed combustion chamber, located at a distance of 1m from the wall.
The Ariston gas wall-mounted boiler is installed and connected, which does not hold pressure at all: during the cooling of the heated water, the pressure drops to zero, although water is regularly drawn in. What about pressure?
The gas wall-mounted boiler Nova Florida Vela CTFS 24 AF cannot start. If we press the on / off button, the burner operates. If the button is pressed, the unit will shut down. Explain the cause of the problem? The thermoelectric converter or the gas valve may be faulty. There may also be a decrease in gas pressure in the inlet pipeline. Sometimes there is a lack of voltage on the control board. There was a problem recently. Turning on is very poor. The pilot burner ignites, but there is no flame on the main gas burner equipment. Can anyone explain what is the reason? Most likely, a malfunction of the ignition mechanism. You need to service the boiler and clean the igniter. Why does the double-circuit boiler Nova Florida Vela Compact not stop working when the desired temperature is set? It heats up to 85C, then it fails. The restart operation repeats everything. Presumably, the electronic board is not in order, the temperature sensor is broken, the overheat protection button has a problem. It cannot be ruled out that an error has occurred in the automation adjustments. Please tell me why it is not possible to raise the temperature of the coolant above 70 C? We need to increase the temperature, and the screen shows that this is the maximum. How to adjust the heat? If the appliance cannot raise the temperature in the heating circuit, the following causes are possible. In the given adjustments, a limit is set for the highest heating temperature not higher than 70C. There is a decrease in the draft speed in the chimney channel. The wall-mounted boiler Nova Florida Delfis performs unstable functions in the heating mode of the DHW system. From the tap can go alternately hot water, then cold. Tell me what's the reason? Sources of failure may be the following. Cold water may be mixed in because the 3-way valve is damaged. The heat exchanger is clogged with dirt. It needs to be cleaned. Water leaks regularly from the tap at the bottom of the boiler. The unit itself cannot be started. What needs to be done? Apparently, there is a coolant discharge through the protection valve. This factor indicates an increase in pressure in the system. Also, the filling valve of the system may not be closed or it may be necessary to pump the expander tank. I would like to know what kind of malfunction happens when the pressure continuously increases and the water relief valve starts to work? The display shows the heating symbol each time the unit is heated. What could be? There is damage to the temperature sensor of the heating circuit. The coolant does not circulate well in the heating system. Why did the Nova Florida gas boiler periodically turn off? Let's say the other day the piezo ignition didn't work at all. The instrument was serviced two weeks ago. What's the matter? We can assume that there were functional violations in the chimney device. You must perform a chimney check. The inoperability of the piezo ignition will mean a breakdown of its component in the event of a voltage drop or water has flowed into it. Can you help me with the chimney please? Soon the second day, as there is a return draft, while the smoke began to fall directly into the room. The chimney was made by myself. It is a steel pipe. Maybe there are omissions somewhere. The device does a good job of heating hot water, and when heating is started, the water immediately comes to a boil, and the unit goes into an accident. What could be wrong, and how to fix it? Probably, the circulation pump is faulty, the control board is damaged, the temperature sensor is broken. The filter screen may also become clogged with debris. In the DHW cycle, the unit alternately starts to produce either cold or hot water. I can't figure out what is causing this. How to adjust the heating of water yourself? Apparently, there is dirt in the heating system or the heat exchanger needs to be cleaned. It is also possible that the pressure control switch is broken or the circulation pump is faulty. The main reason may be an incorrectly made chimney design. There may be soot contamination, which drastically reduces its performance. In addition, be sure to check the hood in the room. We launched the wall-mounted boiler Nova Florida CTN 24. The unit immediately raises the temperature above 96 degrees, but then stops working with overheating. Later, when it cools, it starts to start on its own. What does it depend on? The suspension of work on overheating indicates a circulation problem in the system. First of all, it is recommended to control the position of the taps on the radiators. They must be left open. Next, an inspection is carried out for filter clogging, and it is also recommended to make sure that the heat exchanger does not contain scale. Completed the installation of this model in March. Presumably after five months, the device suddenly began to make a lot of noise. Can you please tell me what is causing the noise? There may be scale in the heat exchanger. When the water is hard, then limescale will be deposited in the radiator pipes in the future. We would like to connect a gas boiler Nova Florida Vela Compact in a country house. Could you tell me how to properly put this device into operation? For the correct start-up of this equipment, certain actions must be taken. Turn on the power supply of the device. We open the gas valve. Then we start the gas burner equipment. Then adjust the desired temperature. We need to do some maintenance. Instruct how to correctly drain the water from the unit? According to the instructions, this work is performed as follows. Disconnect the unit from the mains. Close the gas valve. Open the automatic air vent. Open the drain valve fully. Then clean up spilled liquid. If necessary, the water can be drained through the relief valve. This component is located at the bottom of the boiler device. Can you please tell us how to diagnose the operation of a 3-way valve? I think it doesn't complete the opening. In the heating mode, it does not pump out the outer radiators, however, in the DHW mode, the pipe is heated for the supply of heating water under the boiler unit. Of course, it is necessary to inspect the 3-way valve for the presence of poor stroke of its stem in the intermediate state. We also recommend checking your heating system. We use the floor boiler Nova Florida Altair in the house. Up to this day it worked without problems. Now after five seconds after turning it on, it began to go out. It seems that it cannot force fluid into the system. Tell me what's wrong? A possible factor in this malfunction may be an ignition electrode that does not fix the flame, or a lack of circulation. I recently had a problem with this unit. While working, he began to whistle. I tried restarting - it worked, but there was no change. Tell me, what is the reason for the whistle? In many cases, a sharp whistle occurs when the pressure on the burner nozzles is incorrectly set. It is necessary to check the set value and correct, if appropriate. Water has recently been poured into the boiler, and the unit began to function with delays. For example, we set any temperature, but the heating mode occurs only up to 26 degrees, and then the device turns off. Explain what happened? If the block of the electronic board was flooded with water, it can be assumed that it is faulty. It is necessary to reboot it using a direct disconnection of the device from the mains. Then re-launch and test its functionality. I have a Nova Florida Vela Compact 24 boiler installed. Now, at the start, the wick lights up for 9 seconds, but the main burner does not catch fire, which is why the device starts to fade. How can I fix the breakdown? Based on your words, the ignition unit or a problem with the burner failed. Just in case, you need to see if the phasing is correct when connected to the electrical network. I completed the installation of the same model myself in early August. Somewhere after three months, the hot water supply stopped working, although the heating circuit is operating as expected. I tried to turn on hot water, but the device only displays the temperature, and does not even think about heating. Tell me what's the reason? Most likely, the 3-way valve is faulty. It needs to be changed. Explain why the boiler is equipped with a protective temperature sensor? The temperature sensor stops the flow of gas to the burner in case of overheating of the water in the primary system. I need to flush and clean the main water heat exchanger. Can you tell me how to properly remove this component? This element is freely removed from the device using a conventional screwdriver. Here is the disassembly process. Drain the water from the machine using the drain cock. Then you need to empty the hot water system. Unscrew the fixing screws of the main heat exchanger and remove it from the frame. They connected the unit of just such a model. After about a few months, the water pressure in it dropped. Often he throws it off and stops. That is, it does not hold pressure at all. What is the reason? If the machine does not increase water pressure, it can be assumed that there is a leak from the feed tap. When a shutdown occurs and the pressure drops to zero, the 3-way valve is damaged. Tell me how to clean the cold water filter? First, it is necessary to free the hot water supply system from water. Second, unscrew the flow sensor nut. Then we dismantle the sensor together with the filter from the socket. After removal, clean from debris and dirt. The unit was buzzing at startup before, but now the noise has intensified. Initially, the sound quickly disappeared, but now it is heard longer. arose briefly, met with this problem? The appearance of extraneous roar can be explained by the presence of lime scale inside the heat exchanger housing, the heating of which proceeds unevenly due to different wall thicknesses. The stronger the heat exchanger is clogged, the stronger the roar, and, accordingly, the heat transfer decreases. The device is functioning, but there is clearly no water circulating in the system. Very hot return pump. What could have happened? Most likely, the mud filter is clogged or a tap is closed somewhere, which blocks the movement of the coolant. The circulation pump could still break. Why can't mountains warm up? water? The tap water is barely warm. Help me understand what happened? Troubleshooting can be done in several ways. For example, a malfunction of the DHW temperature sensor, you need to replace it. It is possible that the power adjustments for DHW heating have gone astray. Periodically, we notice a break in the spark during ignition. The burner is clean, the chimney is in order, the draft is good. Where to look for a problem?
The device does not register a spark due to poor notification from the combustion control unit. It is necessary to inspect the wire from the ionization sensor to the electrode. Probably needs to be tightened up. There may be a defect in the sensor insulation, which must be replaced.
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Heating system control. Mounting. Connection. Transfer to another type of gas. Control devices and protection devices.
Peculiarities. Installation and installation. Automation components.
Technical specifications. Mounting. Adjustment and verification. Maintenance.
regulation and protection. Installation and installation. Pressure setting. Maintenance.
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There was a problem after starting. It doesn’t want to turn on, it worked for two years, now the whole display lights up as if the boiler was turned on, when the self-diagnosis mode is on, then it clicks, turns off for miles and seconds and turns on the entire display again. It turned on once, but gives an error E10 water pressure, although the pressure in the system is 1.5 atm. Tell me what can be?
We installed and connected the Baxi Fourtech 24 F boiler. What cold water pressure is allowed at the inlet to the DHW unit?
Bosch boiler 6000 24 kW, single-circuit with built-in three-way valve. Does not see the boiler sensor, gives an error. Tell me how to make it not give an error and work normally both for heating and for the boiler?
If you turn off the DHW flow sensor, then maybe it will be possible to reprogram it into a single-circuit device through the L3 menu?
Installed boiler Arderia esr 2.13 ffcd. If my coolant pressure drops a little in 2-3 days by a couple of divisions, can the three-way valve malfunction be the reason (there are no leaks from the radiators)?
In operation, the gas boiler Arderia 2.35. Tell me about power reduction. Heard something about modulation, fan speed and so on. Is it really possible to reduce power?
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We installed and connected the Buderus Logano G234-WS-44 kW boiler, Logomatic 4211 automation. Heating on cylinders without hot water supply, jets for reduced gas were also replaced. We survived the winter, the cylinders were replaced, all without problems. Then in the spring, when the temperature outside was +16 + 18, the boiler began to turn off for a long time and, when turned on, it began to give a burner error on the screen and a red button light on the front wall lit up. We pressed the button, turned on the power again and everything worked. It happened several times, then the boiler was completely turned off for the summer, what could be the problem?
In a single-circuit Buderus 072, is the BKN coil circuit heated by the same heat exchanger as for heating or the same as on a 2-circuit one that is used for hot water supply?
Tell me, for Vaillant wall-mounted gas boilers, are there any real / actual differences for the better in the new generation turboTEC plus VU / 5-5 compared to / 3-5?
The boiler is malfunctioning, the green LED (power) is flashing, the instructions say that the thermal protection has tripped, the green indicator is flashing, even if nothing is connected to the board. How to fix? I checked all SMD resistors and transistors, everything is in order.
In operation, a double-circuit gas boiler Daewoo Gasboiler with an electronic panel. When the hot water supply is turned on, the heating is heated, the operating mode is summer. Removed the three-way valve, there is no dirt and no production. It seems that the board does not control the three-way valve. How to check?
Installed and connected wall-mounted boiler Electrolux Basic Xi. A problem began that the boiler stopped seeing the flame and turned off the gas supply after 7-8 seconds. And after 3 attempts gave an error E1. How can I fix it?
Koreastar boiler malfunction. The heating works perfectly, hot water comes intermittently, when you turn on the hot water tap, cold water comes first, then boiling water. After a few seconds, cool, then again boiling water. What could be the problem?
Malfunction of the ferroli domiproject 24 boiler - I set it to 60-70 degrees, it switches to minimum combustion, does not turn on, does not turn off. Restart is unstable. No pattern emerges. What to do?
In operation, the Junkers euroline gas boiler, when hot water is turned on, ignites the gas, then goes out and so on several times. If you turn it on while the heating is running, then the water heating turns on immediately. Tell me, please, what could be the problem?
Tell me about the adjustments of the gas boiler Navien Ace 16 turbo remote control v1.3. Unable to adjust fan overrun. I put 30 seconds, but still 2 minutes. turns.
Malfunction of the boiler Oasis ZRT18. The unit starts, gas lights up, then goes out. It lights up again, goes out (it happens three times). Then it fires up and works fine. Doesn't throw any error. What is the reason?
Malfunction of the gas boiler Senor Duval - the water pressure sensor shows 0.0, the indicator flashes red, hot water is not heated, but the water pressure in the apartment is good. How to troubleshoot?
Where should the steam trap be installed in the coaxial chimney? Boiler wh2d with a closed combustion chamber, located at a distance of 1m from the wall.
The problem of starting the Westen Pulsar D boiler. The piezo ignition works, but there is no flame, after the crackling error E01. Swapped the fork.
The floor-standing gas boiler Novella is blocked - the green lights on the panel are on, and nothing else happens. How to fix?
The Ariston gas wall-mounted boiler is installed and connected, which does not hold pressure at all: during the cooling of the heated water, the pressure drops to zero, although water is regularly drawn in. What about pressure?
Boiler malfunction metropolis dgt 25 bf. The DHW stopped working, the heating works, it does not give an error. What do you advise?
Please tell me how to solve the problem. The Solly Standard boiler, with any attempt to turn it on or hot water, gives a GS error.
The Wolf boiler is in operation. AT recent times he began to behave strangely: in the pause between starts, he turns on the burner for one second five times, and 70 degrees pops up on the display. Where to look for a malfunction?
ACV Wester Line is very unstable: it often crashes, it makes a characteristic knock and stalls at startup, but at times everything is fine. The unit is almost new, what's wrong with it?
In the gas boiler, Demrad stopped supplying gas to the burner. The piezo element clicks, but there is no ignition. Everything is in order with the gas stove, there is gas. What is the reason?
Malfunction of the Kiturami world boiler, periodically stops. I wipe the flame sensor, and the device works well for a while, but soon everything repeats. He also began to smoke heavily. Maybe it's a short chimney, and it needs to be lengthened?
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Nike Star, Eolo Star/Mini, Mythos boiler errors. Malfunctions of boilers with the possibility of automatic unblocking.
My boiler in winter mode systematically raises the temperature to 80 degrees. Called the technician three times. He said that many imergaz models have it, and suggested installing a programmer, but not the fact that it would help. Tell me how to solve this problem and will this programmer help?
Models 11.6; 17.4; 23.2; 29.3 kW. Specifications. Control elements of the automation unit. Installation and maintenance. Malfunctions and their elimination.
The AOGV gas boiler was installed and put into operation. Problem with hot water supply. The heat exchanger was washed. Less than a month has passed, and the water is not flowing again. They put a filter on the water, but time passed, and again there is no hot water. What could be the breakdown?
Mounting and installation. Startup and adjustment. Malfunctions and ways of their elimination.
Technical specifications. Installation and connections. Startup and operation. Automation settings.
Malfunction of the boiler Neva Lux 7023. With a frequency of 2 times a month, it gives an E7 error. But after a reboot it still works. Now gives error E6. Works for 15 minutes and then turns off. What could it be?
Construction and automation unit. Ignition order. Faults and repairs.
Tell me, is it possible, because of the weak pressure of the gas, the Atem Zhytomyr boiler goes out, a click occurs and goes out. What is the problem? Is it possible to temporarily turn off the automation and how?
We installed a gas boiler Lemax KSG-12.5 Premium. After turning off the main burner, a click occurs after a couple of minutes, what is the reason for that?
Installed and connected gas boiler KS-G, 250 sq. m. When ignited, it does not turn off, the temperature rises, if I'm not mistaken, Arbat 1 automation. The flame is not regulated - too large. What to do?
I installed the Mayak gas boiler and connected it. It works fine. But here's the reason. When he works on the unit, he squeaks strongly, if the regulator is turned 2-7, the squeak disappears. Tell me what can be?
They installed and connected the Danko gas boiler with Kare automatics, it works fine on the igniter, but as soon as you add power to the burner, it completely fades out, it died out for 5 minutes yesterday, today it works for 20 minutes and completely goes out. Who faced such problem?
The gaseco 18 boiler is in operation. When the hot water is turned on, the pressure in the system drops after replenishment, the pressure reaches 3 bar. Have to drop. What's wrong, how to fix it?
Water often boils in the boiler, while it goes into an overheating accident. The heat exchanger was recently washed, the system is not clogged. What's the matter?
Malfunction of the Rinnai 167 RMF boiler. Recently it began to show error 14. How can I fix the breakdown?
The Celtic ds boiler heats up to 45 degrees and stays all day long and does not turn off and does not heat the batteries, sometimes it shows an a3 error. How can this problem be fixed?
The hot water pressure in the Mora Top boiler has dropped. What is the reason?
Gas wall-mounted boiler Seoul stopped turning on due to a lack of ignition error. How can it be eliminated? What exactly went wrong?
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Overview of the gas wall-mounted boiler Nova Florida Vela Compact
The double-circuit gas wall-mounted boiler Nova Florida Vela Compact with a sealed combustion chamber, forced smoke removal and stopped circulation is designed for heating and hot water supply for private and country houses.
Specifications
Rice. 1 - Hydraulic diagram of the CTFS model
1. DHW temperature sensor, 2. Modulating gas valve, 3. Heating circuit temperature sensor, 4. Burner nozzles, 5. Burner, 6. Ignition/flame detection electrode, 7. Safety thermostat, 8. Bithermic heat exchanger, 9. Sealed combustion chamber, 10. Exhaust fan, 11. Flue gas pressure control point, 12. Air supply/flue gas pressure differential safety switch, 13. Air supply/flue gas coaxial pipe, 14. Combustion chamber air pressure control point, 15. Air outlet valve, 16. Domestic cold water inlet filter, 17. Expansion tank, 18. Circulation pump, 19. Charging tap, 20. Minimum pressure switch in the heating circuit, 21. Safety valve 3 bar, 22. DHW flow limiter - 10 liters per minute , 23. Domestic water flow sensor, M - Heating supply, C - DHW outlet, G - Gas supply, F - Domestic cold water inlet, R - Heating return
The double-circuit gas wall-mounted boiler Nova Florida Vela Compact is equipped with a built-in atmospheric gas burner and is available in the following versions:
CTN 24 AF: open combustion chamber, natural exhaust of combustion products, electronic ignition, bithermic flow heat exchanger for domestic hot water; - CTFS 24 AF: closed combustion chamber, forced exhaust of combustion products, electronic ignition, bithermic flow heat exchanger for domestic hot water. Both models are equipped with an ionization flame detection device.
Operating characteristics of boilers Nova Florida Vela Compact
Rated heat input (Qn) kW - 25.5 / 24.5 Rated net heat input (Pn) kW - 23.7 / 22.2 Reduced input (Qr) kW - 12.5 / 12 Reduced net power (Pr) kW - 11.2 / 10.8 Efficiency at 100% load % - 93 / 90.6 Efficiency at 30% load % - 90.2 / 90 Heating temperature control limits C - 35 - 78 Maximum heating circuit temperature C - 78 + 5 Maximum/minimum system pressure (PMS) bar - 3 - 0 ,5 Rated heat output in DHW mode (Qns) kW - 23.7 / 22.2 Reduced heat output in DHW mode (Qrs) kW - 12.5 / 12 DHW capacity (D) at t 30K l/min - 11.4 / 10.8 DHW circuit bar - 8 - 0.5 DHW temperature control limits C - 35-50 Maximum DHW temperature C - 58 Height mm - 700 Width mm - 400 Depth mm - 250 Weight kg - 27.5 / 24.85 Gas connection - G1 /2 Heating connection - G3/4 DHW connection - G1/2 NOx emission class - 3 / 2 Voltages e power supply V - 230 Mains frequency Hz - 50 Electrical power consumption W - 140 / 80 Electrical protection class - IPX4D
Design characteristics of the boiler Nova Florida Vela Compact
Copper bithermic heat exchanger with high efficiency. - Heating circuit circulation pump with built-in air vent. - Expansion tank with a capacity of 6 liters. - Minimum pressure switch in the heating circuit. - Flow sensor for DHW priority. - DHW flow limiter at 10 l/min. - Make-up tap and drain tap. - Temperature sensors for heating and hot water circuits. - Safety thermostat for temperature limit. - Control panel with electrical protection class IPX4D. - Built-in electronic board for safety and flame modulation. - Electronic ignition and ionization control of the presence of a flame. - Differential pressure switch for combustion products (CTFS). - Flue gas thermostat (CTN). - Modulating gas valve with double cut-off.
User control panel
Combined operating mode switch and heating circuit temperature controller (control range 35/78°C). Combined release switch and DHW temperature controller (control range 35/58°C). Heating circuit manometer.
Status light indication:
The presence of tension; - heating demand; - the presence of a flame; - blocking of a torch; - malfunction of the gas valve; - blockage of the burner due to excess temperature; - blockage of the burner due to the operation of the combustion products pressure differential (CTFS); - blockage of the burner due to the operation of the flue gas thermostat (CTN); - insufficient coolant pressure in the heating circuit; - damage to temperature sensors.
Working (operational) characteristics of boilers Nova Florida Vela Compact
DHW function priority. - Electronic flame modulation in heating mode with a pre-calculated flame rise rate. - Electronic flame modulation in DHW mode. - Boiler antifreeze function (On 5°C, Off : 30°C or after 15 minutes of operation). - Function of spread of a flame in the course of ignition (CTFS). - Time interval between burner starts (24 24 0 seconds at flow temperature > 40°C). - Pump post-circulation function in heating and anti-freeze modes (30 seconds). - DHW pump post-circulation function (6 seconds in winter mode, 1 second in summer mode). - Post-ventilation function in DHW mode and only when the unit is in summer mode (10 seconds - CTFS). - Protective ventilation function after the boiler is blocked due to a malfunction of the temperature sensors (1 minute - CTFS). - Function of anti-blocking of the circulation pump (30 seconds of operation of the pump after each 24 hours of inactivity of the device).
Malfunctions of the double-circuit gas wall-mounted boiler Nova Florida Vela Compact and the method of elimination
1) The boiler is blocked and the LED is red
a) The burner does not turn on
No gas - Check the gas pressure and the condition of the shut-off and safety valves. - Gas valve disconnected - Connect it. - Gas valve defective - Replace it. - Control board defective - Replace it.
b) The burner does not turn on: no spark
Ignition/flame detection electrode defective - Replace electrode. - The control board does not ignite: it is defective - Replace the board.
c) The burner turns on for a few seconds and then turns off
The control board does not detect the presence of a flame: phase and neutral are reversed - Check the correct connection of phase and neutral. - Ignition/flame detection electrode wire disconnected/damaged - Connect or replace wire. - Ignition/flame detection electrode defective - Replace electrode. - The control board does not detect the presence of a flame: it is defective - Replace the board. - Ignition pressure too low - Increase it. - Minimum heat output set incorrectly - Check burner settings. This state is exited by turning the knob to the “Unblock” position.
2) The Nova Florida Vela Compact boiler is blocked and the LED is yellow
a) Fan pressure switch (CTFS) not working
Pressure switch faulty - Check relay: replace if faulty. - Silicone tubing is disconnected or damaged - Connect or replace silicone tubing. - Insufficient air supply or flue gas exhaust for combustion - Check the air supply and flue pipes: clean them or replace if necessary. - The fan is defective - Replace it. - Control board defective - Replace it.
b) The flue gas thermostat (CTN) has tripped
Incorrect operation of the air supply / flue system - Check the chimney, ventilation ducts and grilles. - Flue gas thermostat defective - Replace it. This state is exited by turning the knob to the “Unblock” position.
3) The boiler is blocked and the LED is red
a) The safety thermostat has tripped
There is no circulation in the heating system: system pipes are clogged, thermostatic valves or radiator valves are closed - Check the condition of the heating system. - The circulation pump is blocked or defective - Check the pump. The boiler automatically returns to working condition after 10 seconds. or by turning the knob to the “Unlock” position.
4) LED flashes red
a) The temperature in the heating circuit has exceeded 85°C
Insufficient circulation in the heating system - Check the circulation pump and the condition of the heating system. - The boiler automatically returns to working condition after the elimination of the causes of the blockage.
5) LED flashing yellow
a) Insufficient pressure in the heating system
Leaks in the heating system - Check the condition of the heating system. - Disconnected pressure switch - Connect the switch. - Defective pressure switch - Replace it. The boiler automatically returns to working condition after the blocking causes are eliminated.
6) LED flashes yellow and red
Heating circuit temperature sensor disconnected - Connect it. - Faulty heating circuit temperature sensor - Replace it. The Nova Florida Vela Compact boiler automatically returns to working condition after the causes of the blockage have been eliminated.
7) LED flashes green and red
a) Heating circuit temperature sensor not working
Disconnected DHW temperature sensor - Connect it. - Faulty DHW temperature sensor - Replace it. The unit automatically returns to the working state after the elimination of the causes of blocking.
8) The DHW circuit of the boiler is not working
a) The flow sensor does not work
Insufficient pressure or flow in the DHW circuit - Check DHW system and flow sensor filter. - Flow sensor defective or disconnected - Replace or connect it. - The flow sensor relay is stuck - Replace it.
LED flashes green
a) Gas valve modulator not working
Connection between control board and gas valve broken or missing - Check gas valve connections. - Gas valve modulator coil defective - Replace gas valve modulator coil.
The unit automatically returns to the working state after the elimination of the causes of blocking.
Ferroli gas boiler errors
Errors of gas boilers Ariston
Baxi gas boiler errors
Operation of Daewoo boilers
Errors of Beretta gas boilers
Buderus gas boiler errors
Errors of gas boilers Vailant
Faults and repair Navien
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Overview of the gas boiler KSG Ochag
Nova Florida Vela Compact boiler checks and adjustments
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Nova Florida Vela Compact Gas Boiler Adjustments
Changeover from natural gas to liquefied gas
Make sure that the wall-mounted boiler is disconnected from the mains; - remove the main burner; - remove the nozzles from the main burner and replace them with nozzles of the required diameter, depending on the type of new gas. - be sure to install new copper gaskets; - reinstall the main burner; - set the MET-GPL jumper on the boiler electronic board to the GPL position; - adjust the gas valve.
Gas valve adjustment siemens vgu56.a1109
Fig.5. Siemens gas valve adjustment
Having unscrewed the protective screw in the fitting for measuring the inlet gas pressure with a small screwdriver, connect a micromanometer to the fitting and check the gas pressure at the valve inlet (in the gas line). - Then, in the same way, connect the micromanometer to the gas pressure measuring point at the outlet of the valve. - Turn on the wall-mounted boiler Nova Florida Vela Compact to the maximum heat output by opening the large DHW intake and setting the DHW temperature controller to the maximum. - After removing the yellow plastic protective cap A, turn screw C counterclockwise to decrease the pressure and clockwise to increase the pressure. - After setting the maximum pressure, remove the connector from the modulator coil in order to switch the boiler to the minimum heat output. - Adjust the minimum pressure with the internal screw B of the gas valve (holding the external screw C stationary). - Put the connector on the modulator bobbin and check the correctness and noiselessness of the burner ignition; - Check for gas leaks; - Replace the protective plastic cap A; - Upon completion of the above operations, fill in the tag indicating set parameters and attach it to the device. Nova Florida Vela Compact Gas Boiler Checks
Checking the performance of temperature sensors
The electronics checks the correct operation of the NTC sensors connected to the boiler control board. If the temperature perceived by the sensor is outside the correct temperature range recorded by the sensor, then this is perceived as a malfunction of the sensor. - Malfunction of the temperature sensor of the heating circuit in the heating mode or the anti-freeze function: the burner immediately turns off; the pump stops after a post-circulation cycle; fan runs for 1 minute. Any heating or anti-freeze requests are ignored. - Violation of the heating circuit temperature sensor when the wall-mounted boiler Nova Florida Vela Compact is either in standby mode, or in summer mode, or in winter mode, or in the absence of any requests: the boiler performs the post-circulation function (1 second in winter mode, 30 seconds in summer) and the post-ventilation function for 1 minute. - Violation of the operability of the temperature sensor of the heating circuit in DHW mode: the violation is only signaled, but DHW continues to be provided. - Violation of the DHW circuit temperature sensor when a request for DHW is fulfilled: the burner immediately turns off; the pump performs post-circulation for 1 second in summer mode and 30 seconds in winter mode. - The fan runs for 1 minute (duration of the post-ventilation function after blocking or failure of the temperature sensor). Any DHW requests are ignored while the heating and anti-freeze functions are active.
General check of the gas valve modulator
The electronics checks the functionality of the proportional gas valve modulator. A malfunction is recorded if the modulator is electrically disconnected or has short circuit. In the event of a malfunction of the modulator, all boiler functions are preserved, but at a minimum heat output. The modulator malfunction signal disappears when the modulator electrical parameters return to standard limits.
Automatic Flame Check
The flame detection device is always active and continuously monitors the presence of a flame. When a request is received to turn on the boiler, the state of the contacts of the differential air pressure switch (model CTFS 24 AF) is checked and the fan is turned on. When the initial state of the contacts of the differential air pressure switch (boiler Nova Florida Vela Compact CTFS 24 AF) or the flue gas thermostat (model CTFN 24) is correct, the device maintains a delay TW (1.5 seconds), after which it turns on the gas valve and the ignition transformer. If a flame is detected, the gas valve remains open.
Ignition development
After a delay, the ignition of the burner is initialized. The current in the modulator coil increases within 10 seconds: from the value corresponding to the minimum gas pressure to 65% of the maximum value for an apparatus with an open combustion chamber and 80% of the maximum for a turbo boiler). Actually, the ignition procedure is completed 1 second after the presence of a flame is determined. Now, only in devices with a closed combustion chamber, the process of flame development continues, which consists in the fact that a current increasing to a maximum is supplied to the modulator for two seconds. After the full development of the flame, the gas boiler Nova Florida Vela Compact starts to work in normal mode. The ignition transformer turns off 2 seconds after flame detection or at the end of the safety ignition period. If in cold conditions there is no flame when trying to ignite, repeated ignition attempts are automatically made (up to 5 attempts for a turbo boiler and 2 attempts for a chimney boiler). Between ignition attempts, the combustion chamber is ventilated (10 seconds for a turbo boiler and 35 seconds for a chimney). If the flame disappears, the flame detection device will try to ignite again. The flame detection device enters the lockout state when no flame is detected during the last ignition attempt within the safety ignition period TS (10 seconds) or if the presence of an extraneous flame is detected with the gas valve turned off for more than 1 minute. To unlock it is necessary to wait a few seconds, turn the corresponding knob to the unlock position, wait a while and return the knob to the desired position.
Flue gas thermostat (only Nova Florida Vela Compact CTN 24 AF boiler)
The flue gas thermostat contacts are normally closed. When the exit of flue gases is obstructed, the smoke begins to flow around the smoke extractor from the outside and the temperature of the smoke extractor (on which the thermostat is installed) rises, as a result of which the thermostat triggers open the contacts of the latter. When the contacts are opened, the gas valve is de-energized and 2 seconds after the opening of the contacts, the electronic board is blocked (if the thermostat contacts close within 2 seconds, the electronic board will continue to function normally). After blocking, the pump performs post-circulation. If the thermostat contacts close within 10 seconds after blocking, the Nova Florida Vela Compact boiler can restart. The ten-minute waiting period can be reset by unlocking the appliance with the DHW controller. Start of ignition: if the contacts of the flue gas thermostat open within 2 seconds after the start of ignition, the board is blocked and a post-circulation operation of the pump is performed. After 10 minutes of blocking due to opening of the flue gas thermostat contacts (wait period for flue gas thermostat), the board can restart automatically if the flue gas thermostat contacts are closed. The ten minute waiting period can be reset by unlocking the boiler with the DHW controller. To unlock, wait about 5 seconds, turn the corresponding knob to the unlock position, wait a while and return the knob to the desired position.
Differential air pressure switch (only Nova Florida Vela Compact CTFS 24 boiler model)
The air pressure switch is connected directly to the electronic board and its contacts are normally open. Before turning on the fan, the contacts of the air pressure switch are in the open state. (normally open), and after turning on the fan, they close. When the contacts of the air pressure switch are open, the gas valve cannot turn on. If 10 seconds after turning on the exhaust fan, the contacts of the air pressure switch are still open, then a blocking signal is generated, which does not require an unblocking procedure. The same blocking signal, which does not require an unblocking procedure, is also generated if the contacts of the air pressure switch in standby mode or during operation of the boiler are in the wrong position. If the air pressure switch contacts are in the wrong position for more than 1 minute, the boiler goes into a permanent blocking state, the exit from which requires an unblocking procedure. Differential switch pressure: 45/35 Pa Pmax=1500 Pa
Safety thermostat
The safety thermostat is located on the bithermic heat exchanger and its contacts are normally closed. When the temperature is fixed above 95°C, the contacts open, thereby interrupting the power supply to the gas valve and turning off the burner. The operation of the safety thermostat while the gas valve is operating causes the boiler to block. If the safety thermostat trips when the gas valve is not working (during the period between requests or when the boiler is in standby mode), a malfunction signal will appear (LED 2 lights up red). This situation does not require an unlock procedure. Burner start will be delayed until the safety thermostat contacts close. Safety thermostat with normal closed contacts switches voltage 20Vdc. Response temperature 95°C. Heating circuit temperature sensor: NTC 10k Ohm at 25°C.
DHW temperature sensor: NTC 10k Ohm at 25°C.
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Heating systems for country and country houses. Boilers, geysers, water heaters - Repair, service, operation. Recommendations for assembly and installation.
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Operation of boilers Nova Florida Vela Compact
Boiler start-up Nova Florida Vela Compact
Before starting the Nova Florida Vela Compact boiler, make sure that:
The flue duct and the protruding part of the pipe are installed according to the instructions: when the device is turned on, there must be no leakage of combustion products through the seals; - the unit is connected to the mains with parameters of 230 V and 50 Hz; - the system is properly filled with coolant (pressure on the pressure gauge - 1-1.3 bar); - any shut-off valves in the pipes of the heating system are open; - the gas in the network corresponds to the gas to which the boiler is factory-adjusted: otherwise, change the boiler to another gas. - the gas supply valve is open; - no gas leakage; - the external general switch installed in front of the boiler is switched on; - the safety valve 3 bar of the boiler is not blocked; - no coolant leaks; - the pump is not blocked.
Rice. 6 - Diagram of the control board
0SCHEMOD11: Electronic board M3-M11: Line contacts, TA M13: Telemetry interface M2-M12: Auxiliary device contacts E: Ignition and flame detection electrode P: Circulation pump V: Fan (only for TFS model) TF: Flue gas thermostat (TN model only) PV: Fan pressure switch (TFS model only) DK: Water pressure safety switch SR: Heating sensor 10k Ohm 25 °C B=343 5 SS: Domestic hot water sensor 10k Ohm 25 °C B=343 5 TA: Room thermostat (optional) CM1-CM2: Jumpers for selecting boiler type / gas type FL: Flow sensor VG: Gas valve TL: Limit value thermostat
Boiler operation Nova Florida Vela Compact
Inclusion
The following procedures should only be carried out after the Nova Florida Vela Compact boiler has been installed, checked and certified by a qualified commissioner. - Open the gas shut-off valve. - Switch on the power supply to the unit (the LED will turn green). - Select the operating mode of the boiler using the regulator. - Use the regulator to set the desired temperature of the heat carrier in the heating circuit. - Set the DHW temperature with the controller. - If there is a room thermostat, set the desired temperature in the room. When requested by the heating system, the LED will turn green. When the flame appears, the LED will turn yellow. When turning on the boiler after a long period of inactivity, especially if it is running on liquefied gas, starting the boiler may be difficult. In this case, before starting the boiler, turn on some other gas appliance (eg stove, oven, etc.). Even after such actions, the device may be difficult to start and block once or twice. Unlock by turning the knob to position for a few seconds.
Operation of Nova Florida Vela Compact boilers
To prevent too frequent switching on and off in heating mode, the boiler maintains a four-minute pause between switching on. However, if the temperature in the heating system drops below 40°C, the pause between switching on will be canceled and the device will turn on as needed. The boiler electronics always give priority to domestic hot water over heating. The domestic hot water temperature can be set between 35°C and 58°C. The temperature of the heat carrier in the heating system can be set in the range from 35°C to 78°C. The Nova Florida Vela Compact boiler is equipped with a sanitary hot water flow limiter, which allows a maximum of 10 liters per minute to be obtained. The hot water capacity depends on the heat output and the temperature difference to which the machine heats the water. The appliance is equipped with an anti-freeze protection system, which is disabled when the boiler is in standby mode. When the temperature sensor in the heating circuit detects a temperature of 5°C, the appliance turns on at minimum power and operates for 15 minutes or until the temperature rises to 30°C. When it turns off, the pump still continues to work. The anti-freeze function only protects the unit and not any other components of the heating system. The heating system can be protected by the room thermostat, but remember that when the boiler is put into standby mode, the room thermostat is switched off. The heating system can be effectively protected from freezing by using special antifreeze products suitable for heating systems with different types of structural metals. Do not use automotive antifreeze and check the effectiveness of the product periodically. If the unit is idle but connected to the mains, the pump is turned on for 30 seconds every 24 hours to prevent jamming.
Boiler blocking Nova Florida Vela Compact
When abnormal conditions are created during the operation of the Nova Florida Vela Compact boiler, it is automatically blocked. Depending on the reason for blocking, proceed as described below.
Burner lockout
When the burner locks out, LED 2 (Fig. 1) lights up red.
If this happens, proceed as follows:
Check if the gas valve is open and if there is gas in the line (by turning on the stove, for example). - after making sure that gas is flowing, unblock the burner by turning the knob to position for a few seconds. If the boiler does not turn on and locks up again on the third try, contact a qualified technician. If the burner locks up frequently, indicating a permanently recurring malfunction, you should contact the Service Center for maintenance.
Overheat lockout
When overheating occurs in the heating system, the LED indicator flashes red.
Blocking in case of insufficient pressure in the system
In the event of blocking the Nova Florida Vela Compact boiler due to the pressure switch tripping, the LED indicator flashes yellow. Feed the heating system through the make-up cock located at the bottom next to the hydraulic connections. The pressure in the heating system (when cold) should be 1 - 1.3 bar.
To restore pressure in the heating system, proceed as follows:
Open the system feed valve by turning it counterclockwise and keep it open until the pressure gauge shows a pressure of 1-1.3 bar. - Close the system feed valve by turning it clockwise. If the boiler is often blocked for this reason, this indicates a violation in the heating system. When the make-up of the system is completed, carefully and carefully close the make-up cock. If the make-up valve is not completely closed, this may increase the pressure in the heating system, which will lead to the operation of the boiler safety valve and possible splashing of water from it.
Blocking in case of violations in the chimney / air supply system
In the event of conditions that cause abnormal operation of the chimney or air supply, the boiler is blocked. When the boiler is blocked due to violations in the chimney / air supply system, the LED indicator lights up in yellow.
Blocking in case of failure of temperature sensors
If the device is blocked due to malfunctions of the temperature sensors, the LED indicator flashes as follows:
Yellow/red for heating circuit temperature sensor; - red/green for DHW temperature sensor.
Maximum Power Adjustment
Check the gas pressure value at the inlet; - remove the plastic cap located on the modulator bobbin, which protects the adjusting screws of the pressure regulator; - connect a micromanometer to the IN port to check the gas valve inlet pressure or to the OUT port to check the burner pressure; - turn the regulator on the control panel clockwise until it stops and open one or two hot water taps so that the Nova Florida Vela Compact boiler operates at maximum power; - to INCREASE the pressure on the burner, turn the brass nut clockwise and to DECREASE the pressure, turn it counterclockwise. - when working on liquefied gas, turn the brass nut clockwise until it stops.
Rice. 7 - Gas valve adjustment
Minimum power adjustment
Remove the connector from the regulator bobbin); - turn on the burner and check if the minimum pressure corresponds to the set value; - using a 10 mm wrench, while holding the nut in a fixed position, turn the plastic screw clockwise to increase pressure and counterclockwise to decrease pressure. - put the connector on the modulator bobbin.
Final operations
Turn on the boiler and check the correctness and noiselessness of the ignition of the burner; - check again the maximum and minimum pressure on the gas valve; - if necessary, adjust it; - put back the protective plastic cap; - close gas pressure measuring points; - check for gas leaks.
What to check:
General condition of the device; - tightness of the gas system of the boiler and the gas supply line to the boiler; - gas pressure at the inlet to the apparatus; - minimum and maximum pressure on the burner; - switching on the boiler; - combustion parameters through gas analysis; - integrity, degree of wear and tightness of chimney pipes; - operation of the traction interruption device (CTN); - no leakage of flue gases into the room and correct operation of the chimney (CTN); - correct operation of the flue gas safety thermostat (CTN); - operation of the fan pressure switch (CTFS); - the overall integrity of all boiler safety devices; - absence of water leaks and oxidation of compounds in the boiler; - operation of the safety valve of the system; - expansion tank pressure; - the operation of the pressure switch in the system.
Boiler cleaning operations Nova Florida Vela Compact:
General cleaning of the interior of the unit; - cleaning gas nozzles; - cleaning of air intake and gas outlet pipes (CTFS); - cleaning of the traction interruption device (CTN); - cleaning of ventilation grilles in the room where the boiler is installed (CTN); - cleaning the outer part of the heat exchanger;
When performing the first maintenance, also check:
The suitability of the premises for the installation of the boiler; - ventilation ducts in the room where the boiler is installed (CTN); - flue pipes, their diameters and length;
Correct installation of the boiler according to the instructions given in this manual.
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The gas wall-mounted boiler Nova Florida Vela CTFS 24 AF cannot start. If we press the on / off button, the burner operates. If the button is pressed, the unit will shut down. Explain the cause of the problem? The thermoelectric converter or the gas valve may be faulty. There may also be a decrease in gas pressure in the inlet pipeline. Sometimes there is a lack of voltage on the control board. There was a problem recently. Turning on is very poor. The pilot burner ignites, but there is no flame on the main gas burner equipment. Can anyone explain what is the reason? Most likely, a malfunction of the ignition mechanism. You need to service the boiler and clean the igniter. Why does the double-circuit boiler Nova Florida Vela Compact not stop working when the desired temperature is set? It heats up to 85C, then it fails. The restart operation repeats everything. Presumably, the electronic board is not in order, the temperature sensor is broken, the overheat protection button has a problem. It cannot be ruled out that an error has occurred in the automation adjustments. Please tell me why it is not possible to raise the temperature of the coolant above 70 C? We need to increase the temperature, and the screen shows that this is the maximum. How to adjust the heat? If the appliance cannot raise the temperature in the heating circuit, the following causes are possible. In the given adjustments, a limit is set for the highest heating temperature not higher than 70C. There is a decrease in the draft speed in the chimney channel. The wall-mounted boiler Nova Florida Delfis performs unstable functions in the heating mode of the DHW system. From the tap can go alternately hot water, then cold. Tell me what's the reason? Sources of failure may be the following. Cold water may be mixed in because the 3-way valve is damaged. The heat exchanger is clogged with dirt. It needs to be cleaned. Water leaks regularly from the tap at the bottom of the boiler. The unit itself cannot be started. What needs to be done? Apparently, there is a coolant discharge through the protection valve. This factor indicates an increase in pressure in the system. Also, the filling valve of the system may not be closed or it may be necessary to pump the expander tank. I would like to know what kind of malfunction happens when the pressure continuously increases and the water relief valve starts to work? The display shows the heating symbol each time the unit is heated. What could be? There is damage to the temperature sensor of the heating circuit. The coolant does not circulate well in the heating system. Why did the Nova Florida gas boiler periodically turn off? Let's say the other day the piezo ignition didn't work at all. The instrument was serviced two weeks ago. What's the matter? We can assume that there were functional violations in the chimney device. You must perform a chimney check. The inoperability of the piezo ignition will mean a breakdown of its component in the event of a voltage drop or water has flowed into it. Can you help me with the chimney please? Soon the second day, as there is a return draft, while the smoke began to fall directly into the room. The chimney was made by myself. It is a steel pipe. Maybe there are omissions somewhere. The device does a good job of heating hot water, and when heating is started, the water immediately comes to a boil, and the unit goes into an accident. What could be wrong, and how to fix it? Probably, the circulation pump is faulty, the control board is damaged, the temperature sensor is broken. The filter screen may also become clogged with debris. In the DHW cycle, the unit alternately starts to produce either cold or hot water. I can't figure out what is causing this. How to adjust the heating of water yourself? Apparently, there is dirt in the heating system or the heat exchanger needs to be cleaned. It is also possible that the pressure control switch is broken or the circulation pump is faulty. The main reason may be an incorrectly made chimney design. There may be soot contamination, which drastically reduces its performance. In addition, be sure to check the hood in the room. We launched the wall-mounted boiler Nova Florida CTN 24. The unit immediately raises the temperature above 96 degrees, but then stops working with overheating. Later, when it cools, it starts to start on its own. What does it depend on? The suspension of work on overheating indicates a circulation problem in the system. First of all, it is recommended to control the position of the taps on the radiators. They must be left open. Next, an inspection is carried out for filter clogging, and it is also recommended to make sure that the heat exchanger does not contain scale. Completed the installation of this model in March. Presumably after five months, the device suddenly began to make a lot of noise. Can you please tell me what is causing the noise? There may be scale in the heat exchanger. When the water is hard, then limescale will be deposited in the radiator pipes in the future. We would like to connect a gas boiler Nova Florida Vela Compact in a country house. Could you tell me how to properly put this device into operation? For the correct start-up of this equipment, certain actions must be taken. Turn on the power supply of the device. We open the gas valve. Then we start the gas burner equipment. Then adjust the desired temperature. We need to do some maintenance. Instruct how to correctly drain the water from the unit? According to the instructions, this work is performed as follows. Disconnect the unit from the mains. Close the gas valve. Open the automatic air vent. Open the drain valve fully. Then clean up spilled liquid. If necessary, the water can be drained through the relief valve. This component is located at the bottom of the boiler device. Can you please tell us how to diagnose the operation of a 3-way valve? I think it doesn't complete the opening. In the heating mode, it does not pump out the outer radiators, however, in the DHW mode, the pipe is heated for the supply of heating water under the boiler unit. Of course, it is necessary to inspect the 3-way valve for the presence of poor stroke of its stem in the intermediate state. We also recommend checking your heating system. We use the floor boiler Nova Florida Altair in the house. Up to this day it worked without problems. Now after five seconds after turning it on, it began to go out. It seems that it cannot force fluid into the system. Tell me what's wrong? A possible factor in this malfunction may be an ignition electrode that does not fix the flame, or a lack of circulation. I recently had a problem with this unit. While working, he began to whistle. I tried restarting - it worked, but there was no change. Tell me, what is the reason for the whistle? In many cases, a sharp whistle occurs when the pressure on the burner nozzles is incorrectly set. It is necessary to check the set value and correct, if appropriate. Water has recently been poured into the boiler, and the unit began to function with delays. For example, we set any temperature, but the heating mode occurs only up to 26 degrees, and then the device turns off. Explain what happened? If the block of the electronic board was flooded with water, it can be assumed that it is faulty. It is necessary to reboot it using a direct disconnection of the device from the mains. Then re-launch and test its functionality. I have a Nova Florida Vela Compact 24 boiler installed. Now, at the start, the wick lights up for 9 seconds, but the main burner does not catch fire, which is why the device starts to fade. How can I fix the breakdown? Based on your words, the ignition unit or a problem with the burner failed. Just in case, you need to see if the phasing is correct when connected to the electrical network. I completed the installation of the same model myself in early August. Somewhere after three months, the hot water supply stopped working, although the heating circuit is operating as expected. I tried to turn on hot water, but the device only displays the temperature, and does not even think about heating. Tell me what's the reason? Most likely, the 3-way valve is faulty. It needs to be changed. Explain why the boiler is equipped with a protective temperature sensor? The temperature sensor stops the flow of gas to the burner in case of overheating of the water in the primary system. I need to flush and clean the main water heat exchanger. Can you tell me how to properly remove this component? This element is freely removed from the device using a conventional screwdriver. Here is the disassembly process. Drain the water from the machine using the drain cock. Then you need to empty the hot water system. Unscrew the fixing screws of the main heat exchanger and remove it from the frame. They connected the unit of just such a model. After about a few months, the water pressure in it dropped. Often he throws it off and stops. That is, it does not hold pressure at all. What is the reason? If the machine does not increase water pressure, it can be assumed that there is a leak from the feed tap. When a shutdown occurs and the pressure drops to zero, the 3-way valve is damaged. Tell me how to clean the cold water filter? First, it is necessary to free the hot water supply system from water. Second, unscrew the flow sensor nut. Then we dismantle the sensor together with the filter from the socket. After removal, clean from debris and dirt. The unit was buzzing at startup before, but now the noise has intensified. Initially, the sound quickly disappeared, but now it is heard longer. arose briefly, met with this problem? The appearance of extraneous roar can be explained by the presence of lime scale inside the heat exchanger housing, the heating of which proceeds unevenly due to different wall thicknesses. The stronger the heat exchanger is clogged, the stronger the roar, and, accordingly, the heat transfer decreases. The device is functioning, but there is clearly no water circulating in the system. Very hot return pump. What could have happened? Most likely, the mud filter is clogged or a tap is closed somewhere, which blocks the movement of the coolant. The circulation pump could still break. Why can't mountains warm up? water? The tap water is barely warm. Help me understand what happened? Troubleshooting can be done in several ways. For example, a malfunction of the DHW temperature sensor, you need to replace it. It is possible that the power adjustments for DHW heating have gone astray. Periodically, we notice a break in the spark during ignition. The burner is clean, the chimney is in order, the draft is good. Where to look for a problem?
The device does not register a spark due to poor notification from the combustion control unit. It is necessary to inspect the wire from the ionization sensor to the electrode. Probably needs to be tightened up. There may be a defect in the sensor insulation, which must be replaced.
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There was a problem after starting. It doesn’t want to turn on, it worked for two years, now the whole display lights up as if the boiler was turned on, when the self-diagnosis mode is on, then it clicks, turns off for miles and seconds and turns on the entire display again. It turned on once, but gives an error E10 water pressure, although the pressure in the system is 1.5 atm. Tell me what can be?
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We installed and connected the Buderus Logano G234-WS-44 kW boiler, Logomatic 4211 automation. Heating on cylinders without hot water supply, jets for reduced gas were also replaced. We survived the winter, the cylinders were replaced, all without problems. Then in the spring, when the temperature outside was +16 + 18, the boiler began to turn off for a long time and, when turned on, it began to give a burner error on the screen and a red button light on the front wall lit up. We pressed the button, turned on the power again and everything worked. It happened several times, then the boiler was completely turned off for the summer, what could be the problem?
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Overview of the gas wall-mounted boiler Nova Florida Vela Compact
The double-circuit gas wall-mounted boiler Nova Florida Vela Compact with a sealed combustion chamber, forced smoke removal and stopped circulation is designed for heating and hot water supply for private and country houses.
Specifications
Rice. 1 - Hydraulic diagram of the CTFS model
1. DHW temperature sensor, 2. Modulating gas valve, 3. Heating circuit temperature sensor, 4. Burner nozzles, 5. Burner, 6. Ignition/flame detection electrode, 7. Safety thermostat, 8. Bithermic heat exchanger, 9. Sealed combustion chamber, 10. Exhaust fan, 11. Flue gas pressure control point, 12. Air supply/flue gas pressure differential safety switch, 13. Air supply/flue gas coaxial pipe, 14. Combustion chamber air pressure control point, 15. Air outlet valve, 16. Domestic cold water inlet filter, 17. Expansion tank, 18. Circulation pump, 19. Charging tap, 20. Minimum pressure switch in the heating circuit, 21. Safety valve 3 bar, 22. DHW flow limiter - 10 liters per minute , 23. Domestic water flow sensor, M - Heating supply, C - DHW outlet, G - Gas supply, F - Domestic cold water inlet, R - Heating return
The double-circuit gas wall-mounted boiler Nova Florida Vela Compact is equipped with a built-in atmospheric gas burner and is available in the following versions:
CTN 24 AF: open combustion chamber, natural exhaust of combustion products, electronic ignition, bithermic flow heat exchanger for domestic hot water; - CTFS 24 AF: closed combustion chamber, forced exhaust of combustion products, electronic ignition, bithermic flow heat exchanger for domestic hot water. Both models are equipped with an ionization flame detection device.
Operating characteristics of boilers Nova Florida Vela Compact
Rated heat input (Qn) kW - 25.5 / 24.5 Rated net heat input (Pn) kW - 23.7 / 22.2 Reduced input (Qr) kW - 12.5 / 12 Reduced net power (Pr) kW - 11.2 / 10.8 Efficiency at 100% load % - 93 / 90.6 Efficiency at 30% load % - 90.2 / 90 Heating temperature control limits C - 35 - 78 Maximum heating circuit temperature C - 78 + 5 Maximum/minimum system pressure (PMS) bar - 3 - 0 ,5 Rated heat output in DHW mode (Qns) kW - 23.7 / 22.2 Reduced heat output in DHW mode (Qrs) kW - 12.5 / 12 DHW capacity (D) at t 30K l/min - 11.4 / 10.8 DHW circuit bar - 8 - 0.5 DHW temperature control limits C - 35-50 Maximum DHW temperature C - 58 Height mm - 700 Width mm - 400 Depth mm - 250 Weight kg - 27.5 / 24.85 Gas connection - G1 /2 Heating connection - G3/4 DHW connection - G1/2 NOx emission class - 3 / 2 Voltages e power supply V - 230 Mains frequency Hz - 50 Electrical power consumption W - 140 / 80 Electrical protection class - IPX4D
Design characteristics of the boiler Nova Florida Vela Compact
Copper bithermic heat exchanger with high efficiency. - Heating circuit circulation pump with built-in air vent. - Expansion tank with a capacity of 6 liters. - Minimum pressure switch in the heating circuit. - Flow sensor for DHW priority. - DHW flow limiter at 10 l/min. - Make-up tap and drain tap. - Temperature sensors for heating and hot water circuits. - Safety thermostat for temperature limit. - Control panel with electrical protection class IPX4D. - Built-in electronic board for safety and flame modulation. - Electronic ignition and ionization control of the presence of a flame. - Differential pressure switch for combustion products (CTFS). - Flue gas thermostat (CTN). - Modulating gas valve with double cut-off.
User control panel
Combined operating mode switch and heating circuit temperature controller (control range 35/78°C). Combined release switch and DHW temperature controller (control range 35/58°C). Heating circuit manometer.
Status light indication:
The presence of tension; - heating demand; - the presence of a flame; - blocking of a torch; - malfunction of the gas valve; - blockage of the burner due to excess temperature; - blockage of the burner due to the operation of the combustion products pressure differential (CTFS); - blockage of the burner due to the operation of the flue gas thermostat (CTN); - insufficient coolant pressure in the heating circuit; - damage to temperature sensors.
Working (operational) characteristics of boilers Nova Florida Vela Compact
DHW function priority. - Electronic flame modulation in heating mode with a pre-calculated flame rise rate. - Electronic flame modulation in DHW mode. - Boiler antifreeze function (On 5°C, Off : 30°C or after 15 minutes of operation). - Function of spread of a flame in the course of ignition (CTFS). - Time interval between burner starts (24 24 0 seconds at flow temperature > 40°C). - Pump post-circulation function in heating and anti-freeze modes (30 seconds). - DHW pump post-circulation function (6 seconds in winter mode, 1 second in summer mode). - Post-ventilation function in DHW mode and only when the unit is in summer mode (10 seconds - CTFS). - Protective ventilation function after the boiler is blocked due to a malfunction of the temperature sensors (1 minute - CTFS). - Function of anti-blocking of the circulation pump (30 seconds of operation of the pump after each 24 hours of inactivity of the device).
Malfunctions of the double-circuit gas wall-mounted boiler Nova Florida Vela Compact and the method of elimination
1) The boiler is blocked and the LED is red
a) The burner does not turn on
No gas - Check the gas pressure and the condition of the shut-off and safety valves. - Gas valve disconnected - Connect it. - Gas valve defective - Replace it. - Control board defective - Replace it.
b) The burner does not turn on: no spark
Ignition/flame detection electrode defective - Replace electrode. - The control board does not ignite: it is defective - Replace the board.
c) The burner turns on for a few seconds and then turns off
The control board does not detect the presence of a flame: phase and neutral are reversed - Check the correct connection of phase and neutral. - Ignition/flame detection electrode wire disconnected/damaged - Connect or replace wire. - Ignition/flame detection electrode defective - Replace electrode. - The control board does not detect the presence of a flame: it is defective - Replace the board. - Ignition pressure too low - Increase it. - Minimum heat output set incorrectly - Check burner settings. This state is exited by turning the knob to the “Unblock” position.
2) The Nova Florida Vela Compact boiler is blocked and the LED is yellow
a) Fan pressure switch (CTFS) not working
Pressure switch faulty - Check relay: replace if faulty. - Silicone tubing is disconnected or damaged - Connect or replace silicone tubing. - Insufficient air supply or flue gas exhaust for combustion - Check the air supply and flue pipes: clean them or replace if necessary. - The fan is defective - Replace it. - Control board defective - Replace it.
b) The flue gas thermostat (CTN) has tripped
Incorrect operation of the air supply / flue system - Check the chimney, ventilation ducts and grilles. - Flue gas thermostat defective - Replace it. This state is exited by turning the knob to the “Unblock” position.
3) The boiler is blocked and the LED is red
a) The safety thermostat has tripped
There is no circulation in the heating system: system pipes are clogged, thermostatic valves or radiator valves are closed - Check the condition of the heating system. - The circulation pump is blocked or defective - Check the pump. The boiler automatically returns to working condition after 10 seconds. or by turning the knob to the “Unlock” position.
4) LED flashes red
a) The temperature in the heating circuit has exceeded 85°C
Insufficient circulation in the heating system - Check the circulation pump and the condition of the heating system. - The boiler automatically returns to working condition after the elimination of the causes of the blockage.
5) LED flashing yellow
a) Insufficient pressure in the heating system
Leaks in the heating system - Check the condition of the heating system. - Disconnected pressure switch - Connect the switch. - Defective pressure switch - Replace it. The boiler automatically returns to working condition after the blocking causes are eliminated.
6) LED flashes yellow and red
Heating circuit temperature sensor disconnected - Connect it. - Faulty heating circuit temperature sensor - Replace it. The Nova Florida Vela Compact boiler automatically returns to working condition after the causes of the blockage have been eliminated.
7) LED flashes green and red
a) Heating circuit temperature sensor not working
Disconnected DHW temperature sensor - Connect it. - Faulty DHW temperature sensor - Replace it. The unit automatically returns to the working state after the elimination of the causes of blocking.
8) The DHW circuit of the boiler is not working
a) The flow sensor does not work
Insufficient pressure or flow in the DHW circuit - Check the DHW system and flow sensor filter. - Flow sensor defective or disconnected - Replace or connect it. - The flow sensor relay is stuck - Replace it.
LED flashes green
a) Gas valve modulator not working
Connection between control board and gas valve broken or missing - Check gas valve connections. - Gas valve modulator coil defective - Replace gas valve modulator coil.
The unit automatically returns to the working state after the elimination of the causes of blocking.
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Nova Florida Vela Compact boiler checks and adjustments
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Nova Florida Vela Compact Gas Boiler Adjustments
Changeover from natural gas to liquefied gas
Make sure that the wall-mounted boiler is disconnected from the mains; - remove the main burner; - remove the nozzles from the main burner and replace them with nozzles of the required diameter, depending on the type of new gas. - be sure to install new copper gaskets; - reinstall the main burner; - set the MET-GPL jumper on the boiler electronic board to the GPL position; - adjust the gas valve.
Gas valve adjustment siemens vgu56.a1109
Fig.5. Siemens gas valve adjustment
Having unscrewed the protective screw in the fitting for measuring the inlet gas pressure with a small screwdriver, connect a micromanometer to the fitting and check the gas pressure at the valve inlet (in the gas line). - Then, in the same way, connect the micromanometer to the gas pressure measuring point at the outlet of the valve. - Turn on the wall-mounted boiler Nova Florida Vela Compact to the maximum heat output by opening the large DHW intake and setting the DHW temperature controller to the maximum. - After removing the yellow plastic protective cap A, turn screw C counterclockwise to decrease the pressure and clockwise to increase the pressure. - After setting the maximum pressure, remove the connector from the modulator coil in order to switch the boiler to the minimum heat output. - Adjust the minimum pressure with the internal screw B of the gas valve (holding the external screw C stationary). - Put the connector on the modulator bobbin and check the correctness and noiselessness of the burner ignition; - Check for gas leaks; - Replace the protective plastic cap A; - Upon completion of the above operations, fill in the label indicating the set parameters and attach it to the machine. Nova Florida Vela Compact Gas Boiler Checks
Checking the performance of temperature sensors
The electronics checks the correct operation of the NTC sensors connected to the boiler control board. If the temperature perceived by the sensor is outside the correct temperature range recorded by the sensor, then this is perceived as a malfunction of the sensor. - Malfunction of the temperature sensor of the heating circuit in the heating mode or the anti-freeze function: the burner immediately turns off; the pump stops after a post-circulation cycle; fan runs for 1 minute. Any heating or anti-freeze requests are ignored. - Violation of the heating circuit temperature sensor when the wall-mounted boiler Nova Florida Vela Compact is either in standby mode, or in summer mode, or in winter mode, or in the absence of any requests: the boiler performs the post-circulation function (1 second in winter mode, 30 seconds in summer) and the post-ventilation function for 1 minute. - Violation of the operability of the temperature sensor of the heating circuit in DHW mode: the violation is only signaled, but DHW continues to be provided. - Violation of the DHW circuit temperature sensor when a request for DHW is fulfilled: the burner immediately turns off; the pump performs post-circulation for 1 second in summer mode and 30 seconds in winter mode. - The fan runs for 1 minute (duration of the post-ventilation function after blocking or failure of the temperature sensor). Any DHW requests are ignored while the heating and anti-freeze functions are active.
General check of the gas valve modulator
The electronics checks the functionality of the proportional gas valve modulator. A malfunction is detected if the modulator is electrically disconnected or has a short circuit. In the event of a malfunction of the modulator, all boiler functions are preserved, but at a minimum heat output. The modulator malfunction signal disappears when the modulator electrical parameters return to standard limits.
Automatic Flame Check
The flame detection device is always active and continuously monitors the presence of a flame. When a request is received to turn on the boiler, the state of the contacts of the differential air pressure switch (model CTFS 24 AF) is checked and the fan is turned on. When the initial state of the contacts of the differential air pressure switch (boiler Nova Florida Vela Compact CTFS 24 AF) or the flue gas thermostat (model CTFN 24) is correct, the device maintains a delay TW (1.5 seconds), after which it turns on the gas valve and the ignition transformer. If a flame is detected, the gas valve remains open.
Ignition development
After a delay, the ignition of the burner is initialized. The current in the modulator coil increases within 10 seconds: from the value corresponding to the minimum gas pressure to 65% of the maximum value for an apparatus with an open combustion chamber and 80% of the maximum for a turbo boiler). Actually, the ignition procedure is completed 1 second after the presence of a flame is determined. Now, only in devices with a closed combustion chamber, the process of flame development continues, which consists in the fact that a current increasing to a maximum is supplied to the modulator for two seconds. After the full development of the flame, the gas boiler Nova Florida Vela Compact starts to work in normal mode. The ignition transformer turns off 2 seconds after flame detection or at the end of the safety ignition period. If in cold conditions there is no flame when trying to ignite, repeated ignition attempts are automatically made (up to 5 attempts for a turbo boiler and 2 attempts for a chimney boiler). Between ignition attempts, the combustion chamber is ventilated (10 seconds for a turbo boiler and 35 seconds for a chimney). If the flame disappears, the flame detection device will try to ignite again. The flame detection device enters the lockout state when no flame is detected during the last ignition attempt within the safety ignition period TS (10 seconds) or if the presence of an extraneous flame is detected with the gas valve turned off for more than 1 minute. To unlock it is necessary to wait a few seconds, turn the corresponding knob to the unlock position, wait a while and return the knob to the desired position.
Flue gas thermostat (only Nova Florida Vela Compact CTN 24 AF boiler)
The flue gas thermostat contacts are normally closed. When the exit of flue gases is obstructed, the smoke begins to flow around the smoke extractor from the outside and the temperature of the smoke extractor (on which the thermostat is installed) rises, as a result of which the thermostat triggers open the contacts of the latter. When the contacts are opened, the gas valve is de-energized and 2 seconds after the opening of the contacts, the electronic board is blocked (if the thermostat contacts close within 2 seconds, the electronic board will continue to function normally). After blocking, the pump performs post-circulation. If the thermostat contacts close within 10 seconds after blocking, the Nova Florida Vela Compact boiler can restart. The ten-minute waiting period can be reset by unlocking the appliance with the DHW controller. Start of ignition: if the contacts of the flue gas thermostat open within 2 seconds after the start of ignition, the board is blocked and a post-circulation operation of the pump is performed. After 10 minutes of blocking due to opening of the flue gas thermostat contacts (wait period for flue gas thermostat), the board can restart automatically if the flue gas thermostat contacts are closed. The ten minute waiting period can be reset by unlocking the boiler with the DHW controller. To unlock, wait about 5 seconds, turn the corresponding knob to the unlock position, wait a while and return the knob to the desired position.
Differential air pressure switch (only Nova Florida Vela Compact CTFS 24 boiler model)
The air pressure switch is connected directly to the electronic board and its contacts are normally open. Before turning on the fan, the contacts of the air pressure switch are in the open state. (normally open), and after turning on the fan, they close. When the contacts of the air pressure switch are open, the gas valve cannot turn on. If 10 seconds after turning on the exhaust fan, the contacts of the air pressure switch are still open, then a blocking signal is generated, which does not require an unblocking procedure. The same blocking signal, which does not require an unblocking procedure, is also generated if the contacts of the air pressure switch in standby mode or during operation of the boiler are in the wrong position. If the air pressure switch contacts are in the wrong position for more than 1 minute, the boiler goes into a permanent blocking state, the exit from which requires an unblocking procedure. Differential switch pressure: 45/35 Pa Pmax=1500 Pa
Safety thermostat
The safety thermostat is located on the bithermic heat exchanger and its contacts are normally closed. When the temperature is fixed above 95°C, the contacts open, thereby interrupting the power supply to the gas valve and turning off the burner. The operation of the safety thermostat while the gas valve is operating causes the boiler to block. If the safety thermostat trips when the gas valve is not working (during the period between requests or when the boiler is in standby mode), a malfunction signal will appear (LED 2 lights up red). This situation does not require an unlock procedure. Burner start will be delayed until the safety thermostat contacts close. The safety thermostat with normally closed contacts switches the voltage 20Vdc. Response temperature 95°C. Heating circuit temperature sensor: NTC 10k Ohm at 25°C.
DHW temperature sensor: NTC 10k Ohm at 25°C.
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Heating systems for country and country houses. Boilers, geysers, water heaters - Repair, service, operation. Recommendations for assembly and installation.
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Operation of boilers Nova Florida Vela Compact
Boiler start-up Nova Florida Vela Compact
Before starting the Nova Florida Vela Compact boiler, make sure that:
The flue duct and the protruding part of the pipe are installed according to the instructions: when the device is turned on, there must be no leakage of combustion products through the seals; - the unit is connected to the mains with parameters of 230 V and 50 Hz; - the system is properly filled with coolant (pressure on the pressure gauge - 1-1.3 bar); - any shut-off valves in the pipes of the heating system are open; - the gas in the network corresponds to the gas to which the boiler is factory-adjusted: otherwise, change the boiler to another gas. - the gas supply valve is open; - no gas leakage; - the external general switch installed in front of the boiler is switched on; - the safety valve 3 bar of the boiler is not blocked; - no coolant leaks; - the pump is not blocked.
Rice. 6 - Diagram of the control board
0SCHEMOD11: Electronic board M3-M11: Line contacts, TA M13: Telemetry interface M2-M12: Auxiliary device contacts E: Ignition and flame detection electrode P: Circulation pump V: Fan (only for TFS model) TF: Flue gas thermostat (TN model only) PV: Fan pressure switch (TFS model only) DK: Water pressure safety switch SR: Heating sensor 10k Ohm 25 °C B=343 5 SS: Domestic hot water sensor 10k Ohm 25 °C B=343 5 TA: Room thermostat (optional) CM1-CM2: Jumpers for selecting boiler type / gas type FL: Flow sensor VG: Gas valve TL: Limit value thermostat
Boiler operation Nova Florida Vela Compact
Inclusion
The following procedures should only be carried out after the Nova Florida Vela Compact boiler has been installed, checked and certified by a qualified commissioner. - Open the gas shut-off valve. - Switch on the power supply to the unit (the LED will turn green). - Select the operating mode of the boiler using the regulator. - Use the regulator to set the desired temperature of the heat carrier in the heating circuit. - Set the DHW temperature with the controller. - If there is a room thermostat, set the desired temperature in the room. When requested by the heating system, the LED will turn green. When the flame appears, the LED will turn yellow. When turning on the boiler after a long period of inactivity, especially if it is running on liquefied gas, starting the boiler may be difficult. In this case, before starting the boiler, turn on some other gas appliance (eg stove, oven, etc.). Even after such actions, the device may be difficult to start and block once or twice. Unlock by turning the knob to position for a few seconds.
Operation of Nova Florida Vela Compact boilers
To prevent too frequent switching on and off in heating mode, the boiler maintains a four-minute pause between switching on. However, if the temperature in the heating system drops below 40°C, the pause between switching on will be canceled and the device will turn on as needed. The boiler electronics always give priority to domestic hot water over heating. The domestic hot water temperature can be set between 35°C and 58°C. The temperature of the heat carrier in the heating system can be set in the range from 35°C to 78°C. The Nova Florida Vela Compact boiler is equipped with a sanitary hot water flow limiter, which allows a maximum of 10 liters per minute to be obtained. The hot water capacity depends on the heat output and the temperature difference to which the machine heats the water. The appliance is equipped with an anti-freeze protection system, which is disabled when the boiler is in standby mode. When the temperature sensor in the heating circuit detects a temperature of 5°C, the appliance turns on at minimum power and operates for 15 minutes or until the temperature rises to 30°C. When it turns off, the pump still continues to work. The anti-freeze function only protects the unit and not any other components of the heating system. The heating system can be protected by the room thermostat, but remember that when the boiler is put into standby mode, the room thermostat is switched off. The heating system can be effectively protected from freezing by using special antifreeze products suitable for heating systems with different types of structural metals. Do not use automotive antifreeze and check the effectiveness of the product periodically. If the unit is idle but connected to the mains, the pump is turned on for 30 seconds every 24 hours to prevent jamming.
Boiler blocking Nova Florida Vela Compact
When abnormal conditions are created during the operation of the Nova Florida Vela Compact boiler, it is automatically blocked. Depending on the reason for blocking, proceed as described below.
Burner lockout
When the burner locks out, LED 2 (Fig. 1) lights up red.
If this happens, proceed as follows:
Check if the gas valve is open and if there is gas in the line (by turning on the stove, for example). - after making sure that gas is flowing, unblock the burner by turning the knob to position for a few seconds. If the boiler does not turn on and locks up again on the third try, contact a qualified technician. If the burner locks up frequently, indicating a permanently recurring malfunction, you should contact the Service Center for maintenance.
Overheat lockout
When overheating occurs in the heating system, the LED indicator flashes red.
Blocking in case of insufficient pressure in the system
In the event of blocking the Nova Florida Vela Compact boiler due to the pressure switch tripping, the LED indicator flashes yellow. Feed the heating system through the make-up cock located at the bottom next to the hydraulic connections. The pressure in the heating system (when cold) should be 1 - 1.3 bar.
To restore pressure in the heating system, proceed as follows:
Open the system feed valve by turning it counterclockwise and keep it open until the pressure gauge shows a pressure of 1-1.3 bar. - Close the system feed valve by turning it clockwise. If the boiler is often blocked for this reason, this indicates a violation in the heating system. When the make-up of the system is completed, carefully and carefully close the make-up cock. If the make-up valve is not completely closed, this may increase the pressure in the heating system, which will lead to the operation of the boiler safety valve and possible splashing of water from it.
Blocking in case of violations in the chimney / air supply system
In the event of conditions that cause abnormal operation of the chimney or air supply, the boiler is blocked. When the boiler is blocked due to violations in the chimney / air supply system, the LED indicator lights up in yellow.
Blocking in case of failure of temperature sensors
If the device is blocked due to malfunctions of the temperature sensors, the LED indicator flashes as follows:
Yellow/red for heating circuit temperature sensor; - red/green for DHW temperature sensor.
Maximum Power Adjustment
Check the gas pressure value at the inlet; - remove the plastic cap located on the modulator bobbin, which protects the adjusting screws of the pressure regulator; - connect a micromanometer to the IN port to check the gas valve inlet pressure or to the OUT port to check the burner pressure; - turn the regulator on the control panel clockwise until it stops and open one or two hot water taps so that the Nova Florida Vela Compact boiler operates at maximum power; - to INCREASE the pressure on the burner, turn the brass nut clockwise and to DECREASE the pressure, turn it counterclockwise. - when working on liquefied gas, turn the brass nut clockwise until it stops.
Rice. 7 - Gas valve adjustment
Minimum power adjustment
Remove the connector from the regulator bobbin); - turn on the burner and check if the minimum pressure corresponds to the set value; - using a 10 mm wrench, while holding the nut in a fixed position, turn the plastic screw clockwise to increase pressure and counterclockwise to decrease pressure. - put the connector on the modulator bobbin.
Final operations
Turn on the boiler and check the correctness and noiselessness of the ignition of the burner; - check again the maximum and minimum pressure on the gas valve; - if necessary, adjust it; - put back the protective plastic cap; - close gas pressure measuring points; - check for gas leaks.
What to check:
General condition of the device; - tightness of the gas system of the boiler and the gas supply line to the boiler; - gas pressure at the inlet to the apparatus; - minimum and maximum pressure on the burner; - switching on the boiler; - combustion parameters through gas analysis; - integrity, degree of wear and tightness of chimney pipes; - operation of the traction interruption device (CTN); - no leakage of flue gases into the room and correct operation of the chimney (CTN); - correct operation of the flue gas safety thermostat (CTN); - operation of the fan pressure switch (CTFS); - the overall integrity of all boiler safety devices; - absence of water leaks and oxidation of compounds in the boiler; - operation of the safety valve of the system; - expansion tank pressure; - the operation of the pressure switch in the system.
Boiler cleaning operations Nova Florida Vela Compact:
General cleaning of the interior of the unit; - cleaning gas nozzles; - cleaning of air intake and gas outlet pipes (CTFS); - cleaning of the traction interruption device (CTN); - cleaning of ventilation grilles in the room where the boiler is installed (CTN); - cleaning the outer part of the heat exchanger;
When performing the first maintenance, also check:
The suitability of the premises for the installation of the boiler; - ventilation ducts in the room where the boiler is installed (CTN); - flue pipes, their diameters and length;
Correct installation of the boiler according to the instructions given in this manual.
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