Before the "advanced" version of the Protherm Klom 17 Bear boiler (aka Proterm "bear") came out, there were no problems with connecting to multi-circuit heating systems. And here, with the release of the klom 17 version, the insanity of European economy and greed reached its climax!

The fact is that the boiler has only one adjustable heating circuit and boiler heating control. Naturally, to expand the contours, you need to buy additional hardware and carry money to accredited specialists.

I note that the prices are not at all democratic, given that "Protherm" has always belonged to the budget category. At the same time, it is not at all a fact that these specialists will be able to do something. In my case, it cost 2700 per call. Two calls to different "specialists" did not lead to anything. The servicemen shrugged their shoulders and said something like "well, such a boiler ... it has such an algorithm of operation."

The work of the Proterm service department is the topic of a separate article .... The one who bought their products is considered waste material and is no longer of interest to the company. I hope this is the first step towards the ruin and departure of this company from our market, or all the same, towards a turn towards the consumer of their products. The second is preferable, since more than one carload of these boilers was imported to Russia.

At 73 degrees the boiler turns off

Let me explain that in order to connect an external control (controller), the boiler only needs to maintain the supply temperature within the specified limit (for example, 71 +/- 2 degrees) - and that's it !!!

Turning on occurs at 48 degrees.

Up to this point, all the boilers that I have met in my life have coped with this perfectly. The same boiler stubbornly kept a "temperature pause" as much as 25-32 degrees. Naturally, there could be no talk of any adjustment .... the automation just started to “go crazy”, and it’s not realistic in principle to heat the boiler in this mode.

In general, I had to take up the setup myself. The optimal, from our point of view, option is described below.

The instructions have a table with customizable functions, access to which is not registered anywhere (+2700 rubles to the service center!).

Entering the "service menu" of the Protherm Klom 17 Bear boiler.

To enter the "service menu" hold down the "MODE" button for about 10 seconds.

Entering the service menu Protherm klom 17 Bear
Release the "MODE" button when the characters "00" appear
Press "+" or "-" to the value "35" and press the "MODE" button
We entered the "Service menu"
Use the "+" or "-" buttons to select the value d.02. " " Maximum burner blocking time"
The default value is "20 minutes".... Set the minimum possible - "2" minutes.

After these manipulations, the "temperature regime fork" becomes about 10 degrees. All the other settings available from the service menu did not lead to a decrease in the temperature fork. To adjust the heating, this is a stretch enough, but for hot water supply it is clearly not enough. You can, of course, raise the temperature to 85 degrees. and enjoy what you've done. But we decided to "finish off the enemy."

Manipulations with the Protherm Klom 17 Bear boiler.

We buy a "native" boiler sensor (for 1200 rudders !!!) and measure its parameters. The original temperature sensor is thermistor. At room temperature it shows 11 kOhm, at 60 degrees 1.6 kOhm.

Sensor resistance for Protherm klom 17 at 60 degrees.

1. To deceive the Protherm klom 17 boiler and install a resistor in the range of 2-10 kOhm into the panel contacts "5 and 6".
2. Buy "Original sensor" for the boiler and start the boiler control through the boiler controller.

In the first case, you will receive a non-adjustable boiler outlet temperature equal to 80 degrees (-/+ 2 degrees). I think you can choose the output temperature in this mode by reducing the set DHW temperature and changing the value of the connected resistor. At the time of the experiment, I did not have other resistors, except for 10 kOhm. On the other hand, the set temperature of 80 degrees is a little more than ideal for installing external controllers.

Sensor readings at room temperature

In the second - the ability to regulate the temperature of the boiler only from the boiler. In this case, the flow temperature jumps will reach the maximum. In other words, we get two modes: 1) heating and 2) DHW mode.

The adjustment algorithm is the following:

Heating mode installed on the boiler

DHW preparation mode. In this case, the flow temperature will be approximately 20 degrees higher than the set water temperature.

It remains to be added that to work in these modes, two icons must be lit on the display - "water supply" and "heating". A blinking icon means that the boiler is in this mode.

I hope this article will be useful to you and save you a lot of time and nerves!)

Ajax Thermo - certified service center

Line of gas boilers Protherm Bear designed for the installation of heating systems and hot water supply of small objects: heat supply needs in private houses, apartments, offices. Floor-standing heat generation units of this series are distinguished by the automation of work processes, cost-effectiveness and the possibility of flexible setting of the operating mode.

Gas devices for generating thermal energy Proterm Medved have a classic design that has proven itself to be optimal in terms of efficiency, durability and stability. The heat exchanger of these thermal installations is made of cast iron, which significantly increases its service life.

The Protherm Medved heat exchanger is easy to operate: the boiler has an information display, start and adjustment keys, and a pressure gauge. The main advantage of Proterm thermal units is their built-in processor. So the Proterm Medved heating boiler can operate according to a scheme that assumes the presence of one heating circuit and an additional water heating boiler for hot water supply. An outdoor t sensor and a room programmer can be connected to the system, which ensures the highest possible gas savings.

Sensors that control the intensity of draft in the gas duct and the temperature of the coolant are responsible for the safety of the operation of floor-standing devices for generating thermal energy. The manufacturer gives a long-term guarantee for the Medved boilers, which is valid only if the commissioning of the gas boiler after its installation was carried out by an organization certified by Protherm.

Commissioning - launch of Proterm Medved

Ajax Thermo is certified company authorized to install and commissioning automatic gas floor installations heat generation Proterm Medved on the territory of the Russian Federation. Our personnel are trained specialists who have undergone special training from the manufacturer and have significant experience in starting heating boilers. Commissioning is a set of measures aimed at ensuring the correct and safe operation of Proterm Medved heat exchangers.

Stock

1. When buying equipment and ordering installation, you get discount -10% to work! 2. When purchasing equipment, ordering installation, start-up and concluding a service contract for maintenance, you receive an additional emergency call is free(24 hours)!

Prices for commissioning boilers (exit fee included)

№	Name of works (equipment)	Price (rub) including transport costs
		Transport zone 1	Transport zone 2	Transport Zone 3
wall gas boilers
1	Commissioning works Protherm, Baxi, Electrolux, Alphatherm, Termet, Thermona, Vaillant, Buderus, Viessmann, De Dietrich, Haier	9000	9500	10 000
Floor atmospheric gas boilers
2	Commissioning works Protherm, Baxi, Alphatherm, Thermona
	up to 40 kW	9000	9500	10 000
	up to 70 kW	10 000	10 500	11 000
	up to 100 kW	11 500	12 000	12 500
	up to 150 kW	13 500	14 000	14 500
3	Commissioning works Vaillant, Buderus, Viessmann, De Dietrich
	up to 40 kW	12 000	12 500	13 000
	up to 70 kW	13 000	13 500	14 000
	up to 100 kW	14 500	15 000	15 500
	up to 150 kW	16 500	17 000	17 500
Floor standing boilers with air burners up to 100 kW
4	Commissioning works Protherm, Alphatherm	15 500	16 000	16 500
5	Commissioning works Buderus, Viessmann, De Dietrich	17 000	17 500	18 000
Electric boilers
6	Commissioning works Protherm, Vaillant up to 28kW	7000	7500	8000
Condensing boilers
7	Commissioning works Wall mounted boilers up to 60 kW	11 000	11 500	12 000
8	Commissioning works Floor boilers up to 100 kW	16 000	16 500	17 000
Additional services
9	Connection of sensors, 3-way valves, mixers, pumps in the electrical part up to 2 circuits at a distance of up to 5 m from the boiler, without laying the cable in the canister and chasing the walls.
	as a separate service	6500	7000	7500
10	Installing and adjusting the room thermostat (without laying the cable)	INCLUDED IN THE COST OF COMMISSIONING WORKS
11	Connection of additional pumps, sensors, mixers, 3-way valves	1000
	as a separate service	6500	7000	7500
12	Connection of additional weather-dependent regulators, thermostats
13	Setting up multi-loop automation	from 6000r
	Reconfiguring the boiler for liquefied gas

*prices for commissioning are given without taking into account the setting of weather-compensated automation

**prices for additional services are given without taking into account cable laying in a pencil case and wall chasing
Transport zone 1 - within the Moscow Small Ring ("First Betonka") - passes through the cities: Noginsk, Elektrostal, Bronnitsy, the territory of G. O. Domodedovo, Selyatino, Zvenigorod, Chernogolovka, etc.
Transport zone 2 - within the Moscow big ring("Big Betonka") - passes through the cities: Orekhovo-Zuevo, Likino-Dulyovo, Kurovskoye, Voskresensk, Balabanovo, Ruza, Klin, Dmitrov, etc.
Transport Zone 3 – within the boundaries of the Moscow region with restrictions on destinations
Transport zone 4 - negotiable price.

How we do boiler commissioning

1. Setting up, starting the boiler and others necessary work according to the boiler commissioning chart, namely:
1.1. Checking the chimney connection.
1.2. Checking the ventilation duct.
1.3. Checking compliance with placement rules thermal equipment indoors according to SNiPU.
1.4. Electrical installation check.
1.5. Checking the quality of the boiler supply network.
1.6. Equipment grounding check.
1.7. Checking the gas or fuel system connection.

2. Checking the connection of the pipeline to the boiler, boiler and the presence of:
2.1. filters.
2.2. shutoff valve.
2.3. safety valve.
2.4. air release valve.
2.5. pressure gauges.
2.6. auxiliary fittings.

3. Starting the boiler and adjusting the burner.
4. Setting up boiler automation.
5. Heating water and hot water heating control.
6. Checking the functionality of the boiler protection systems.
7. Checking the performance of the boiler and boiler in all thermal conditions.
8. Stop the system.
9. Control of all parameters.
10. Restarting the boiler, checking the automatic mode of operation.
11. Connecting the boiler, pumps electrically at a distance of up to 5 m from the boiler, without laying the cable in the canister and chasing the walls.
12. Installation and adjustment of the room thermostat (without laying the cable)
13. All transportation costs are included in the cost of work
14. Drawing up an act of completion of work.

Why is it better to order commissioning of the boiler in Ajax Thermo

Experience and reliability
Ajax Thermo has been commissioning boilers since 1991, having accumulated a huge positive experience and reputation, there are not many companies that can boast of this.

Large list of operations
You can see for yourself in the list of operations that we carry out as part of the boiler commissioning service, we do not just press the power button, but we do a lot of work to make your boiler work long and efficiently.

We do everything ourselves
All installers are certified full-time personnel of Ajax Thermo, we do not trust such serious and responsible work to third-party performers.

Low prices
We really have some of the most low prices for the commissioning of Protherm, Vaillant, Baxi, De Dietrich, Alphatherm boilers in the Moscow region, and in terms of the volume of work / price ratio, we have no equal.

Official contract and statement on a guarantee
We conclude an official contract for the start-up of the boiler, provide the necessary package of documents, make a note in the passport of the boiler about putting it into operation and putting it on the Guarantee.

Licenses and certificates
SRO for installation and commissioning, certification of leading European manufacturers - Vaillant, Protherm, Baxi, Alpatherm, De Dietrich.

Starting the gas boiler into operation should be carried out only by certified specialists of an authorized service organization.

Our specialists during commissioning carry out:

• - verification correct sequence installation of gas boilers;
• - checking the heating circuit for tightness;
• - starting the boiler and checking the operation of the burner;
• - burner setting;
• - checking and adjusting the operation of equipment in various modes;
• - fixation required parameters work with special devices with their inclusion in the relevant act.

According to the results of commissioning, Ajax Thermo specialists instruct users on the operation of the boiler. After start-up, the necessary marks are made in the equipment passport, and it is put on a guarantee.

__________________________________________________________________________

Installation, connection and start-up of the boiler Proterm Panther

Mounted gas boiler Proterm Panther 25 KTV with forced exhaust of combustion products and model 25 KOV with natural exhaust, running on natural gas or propane, are designed for heating and hot water supply of country houses, cottages, small garden buildings, utility buildings and other facilities that are equipped with heating system with forced circulation of the coolant and water supply.

Fig.1. Hinged gas boiler 25 KTV PANTHER

1 - closed (sealed) combustion chamber (turbochamber); 2 - atmospheric type burner; 3 - heat exchanger; 4 - circulation pump; 5 - air vent; 6 - heat exchanger of the DHW system; 7 - three-way valve drive; 8 - gas valve; 9 - ignition electrodes; 10 - control electrode; 11 - ignition unit; 12 - control panel; 13 - heating temperature sensor; 14 - emergency temperature sensor; 15 - thrust sensor; 16 - fan; 17 - water pressure sensor

The boiler is designed for operation in the temperature range from +5 to 40 °C and relative humidity up to 85%.

The temperature of the outer surfaces of the boiler unit (side and top covers) during boiler operation must not exceed the ambient air temperature by no more than 50°C.

When placing the boiler, it is not allowed to place objects near it:

From flame-retardant materials - at a distance of less than 100 mm from the surface;

From flammable materials, such as fibreboard, polyurethane, lightweight PVC, synthetic fibres, rubber, etc. - at a distance of less than 200 mm from the surface.

A free space of at least 1m must be left in front of the boiler for maintenance work.

At the Protherm Panther 25 KTV boiler, the removal of combustion products and the supply of combustion air is carried out by a special coaxial pipeline or separate pipelines.

From standard parts, you can make a coaxial chimney for almost all laying options. The length of the chimney, the type and number of sections must be agreed with the service organization.

The chimney must be laid in such a way that the condensate from the combustion products can be removed. For this, special sections are designed that are built into the chimney route.

The gas boiler Proterm Panther 25 KOV is designed to discharge combustion products into a natural draft chimney. The boiler is connected to the chimney using a pipe with a diameter corresponding to the size of the chimney pipe.

It is not allowed to install objects in the pipe that restrict the passage of combustion products (for example, different kinds heat recovery heat exchangers, etc.).

Installation of a gas boiler Proterm Panther

The Protherm Panther 25 KTV (KOV) boiler should be installed in closed heating systems with water as the heat carrier. The nominal pipe diameter of the system is selected based on the characteristics of the pump. The pipeline is designed according to the required capacity of this system, and not the maximum
boiler heat output.

In this case, the flow rate of the coolant must be such that the temperature difference between the supply and return is no more than 20 ° C. The minimum flow rate of water in the system is 500 l/h. The piping system must be designed in such a way as to ensure the removal of air from it.

Air vents are located at the highest point in the system and on all radiators. The heating system is filled to a pressure of at least 1 bar. The recommended pressure range in the system is 1.2 - 2 bar.

The expansion tank of the boiler is designed for a heating system capacity of 95 liters. In larger systems, another membrane-type expansion tank should be installed. Heating radiators can be equipped with thermostatic valves.

If the unit is controlled by a room regulator, thermostatic valves are not installed in the room where the room regulator is located. Before installation, the system must be thoroughly cleaned.

DHW system

Water pressure in DHW system should be in the range of 1 - 6 bar. If the pressure exceeds 6 bar, a pressure reducing valve must be installed on the inlet. At high hardness tap water it is recommended to take appropriate measures to reduce it.

Connection pipes have external threads. They must not be loaded with the weight of the pipes of the heating system, the DHW system or the gas supply. The installation dimensions of the connecting pipes (height, distance from the wall and between individual inlets and outlets) must be exactly observed.

In the lower part of the boiler there is a hydraulic group, which is equipped with a safety relief valve, a system filling (filling) valve and a drain cock. If the maximum pressure in the system (2.5 kgf/cm2) is exceeded, water may flow out of the safety relief valve or steam may be released.

Connecting the boiler to heating system it is recommended to carry it out in such a way that during its repair it is possible to drain the water only from the unit. Make-up of the heating system (in small quantities) can be carried out using the make-up tap.

The drain valve is designed to reduce the water pressure in the boiler during possible repairs. It is possible to drain water from the boiler with this tap only partially. Complete draining of water or the entire heating system, as well as re-filling, must be carried out using valves (plugs) for filling and draining installed in
certain places heating system.

Filling the Protherm Panther boiler and system with water should be done in the following order:

Check that the pressure in the DHW system is higher than the water pressure in the heating system.

Carefully open the filling cock in the hydraulic group and at the same time monitor the pressure increase on the boiler pressure gauge. The faucet is opened by turning counterclockwise, clockwise - closes.

When the required pressure is reached, the filling valve must be closed carefully and check whether the water pressure rises (the valve must be completely closed).

If the DHW pressure in the water supply is the same or lower than the pressure in the heating system, water may leak into the water supply, which is unacceptable. This can be prevented by installing a non-return valve on the water supply pipe to the boiler.

During repairs, unfavorable building layouts, etc., it is possible to connect the boiler to the heating system, hot water system and gas supply with special flexible hoses.

When using flexible hoses, they must have a length of no more than 0.5 m, protected from mechanical stress and damage, exposure to aggressive substances. At the end of the service life of the hoses, they must be replaced with new ones. To connect the boiler to copper pipes, you can use a special connection kit of shaped copper pipes with fittings.

Tube dimensions:

OV inlet and outlet - tube diameter 22 mm.
- DHW inlet and outlet - tube diameter 15 mm.
- Gas connection - tube diameter 22 mm.
- Safety valve connection - tube diameter 22 mm.

Gas connection

Size 25 KTV (KOV) - ZP is designed to operate on natural gas with a nominal pressure in the distribution network of 1.8 kPa and a calorific value of 35900 kJ/m3. The pipe diameter, fittings and gas meter must be selected taking into account other gas appliances of the consumer. A pipe with a minimum connecting diameter of 1/2“ must be connected to the boiler, but preferably with a nominal diameter of 3/4“.

Size 25 KTV (KOV) - P is designed to operate on liquefied gas (propane), with calorific value from 12.3 to 13.0 kWh/kg.

Due to the fact that the operation of the boiler with the use of cylinders is problematic, primarily from the point of view of ensuring a sufficient number of them, as well as their further use, the simultaneous use of a gas tank near the heated object and its filling by an authorized organization is envisaged.

Calculations of the required sizes of propane supply from the gas tank to the boiler unit or to other gas appliances are part of the design and delivery of the gas tank. With the help of a gas pressure reducing valve, it is necessary to ensure the nominal gas pressure in front of the boiler is 3.0 kPa.

Air supply and removal of combustion products

Air is supplied and exhaust products of combustion are carried out through an external coaxial pipeline? 100 mm. The equivalent length of the pipeline (numerically equal to the sum of the linear meters of the straight pipe and the number of 90° bends) should not exceed 9 m. If the equivalent length of the pipeline is more than 3 m, the throttle disc must be removed from the fan outlet.

Horizontal sections of the pipeline must be installed with a slope of at least 1.5% towards the flue gas outlet so that condensate flows out of the pipeline. Condensate drains are used in vertical sections.

The outlet of the pipeline must be located:

At a height of at least 2 m from the foundation of the building in places visited by people and at least 0.4 m - in places not visited by people;

At a distance of at least 0.5 m horizontally from windows, permanently open ventilation grills and doors;

Above the upper border of windows, bars or doors;

In the area under awnings, balconies and roof edges.

Minimum distance between two adjacent pipe outlets:

Horizontally - 1 m;
- vertically - 2 m.

The direction of the pipe exit should be oriented so that the combustion products go out into the open space.

The horizontal distance from the end of the outlet of the pipeline on one facade to the other, with the opposite placement of outlets, should be:

2 m if there are no windows or bars on one facade;

1 m if both facades are without windows or bars;

4 m if both facades have windows or bars (or if there are adjacent exits on the same facade).

In the niche of the facade of the building, the distance between the axis of the pipeline outlet and the adjacent plane of the facade should be:

2 m if there are windows or bars on the facade;
- 0.5 m - if they are absent.

All distances are given from the outer border of the window (grille) or door to the axis of the pipeline. In the space under the canopy (balcony), the pipe head must be at a distance of at least the radius of the circle.

With a vertical exit of pipelines to the roof, their heads should be placed at a distance of at least 0.4 m horizontally and at a height of at least 0.4 m from the roof surface, taking into account its shape.

The chimney outlet must not be placed in an explosive area, in internal parts buildings or structures, tunnels or underpasses, in enclosed spaces.

A hole in the wall for the passage of a coaxial pipeline is made with a certain gap (from 10 to 15 mm). Upon completion of installation, the gap is insulated with non-combustible materials (mounting foam, gypsum, plaster).

Electrical connection of the gas boiler Proterm Panther

The Proterm Panther boiler must be connected to the mains through a socket with a grounding contact, which eliminates the zero-phase connection error. The distance from the boiler to the socket must be within the length of the boiler power cord (1m).

The boiler must be connected to a protective conductor (ground). The ground conductor must be accessible for inspection and resistance testing.

It is not allowed to use various tees, extensions, etc. for the electrical connection. The boiler is protected against overload and short circuit by fuses P1 -T80 mA/250V, P2 - T 1.6 A/250V installed in the control panel. Before working on the electrical equipment of the boiler, it is necessary to disconnect the boiler from the mains by disconnecting the electrical plug from the socket.

To control the boiler from a room regulator, use a regulator with a potential-free output (except for the mains voltage, it is not allowed to supply any other voltage to the boiler). Connect the room regulator to the unit with a flexible two-wire cable with a cross section of 0.5 to 1.5 mm2. Exit the cable from the boiler through a plastic cable gland.

The terminal block for connecting the room regulator and the external sensor is located at the bottom, inside the boiler and is accessible after removing the outer cover and turning the control panel. Before connecting, the jumper must be removed from the terminal block. The minimum load on the output contacts of the regulator is 24 V / 0.1A.

Sensor outdoor temperature should be connected with a two-core copper conductor with a cross section of 0.75 mm2. Wiring resistance should be no more than 10 ohms, the maximum length is 30 m.

The circuits for connecting the outside temperature sensor and the room thermostat must not be laid together with the mains voltage circuits.

Commissioning of the Protherm Panther boiler:

Remove the screw securing the cover to the bottom of the boiler;

Tilt the cover down (towards you) and lift it off the pins at the top of the camera.

Make sure the gas supply is closed.

Loosen the cap on the automatic air separator located on the pump.

Connect the boiler to the electrical network.

Turn the power switch to position “I”. The display will show code F0, the pump will run for approximately 1 minute.

Press the Bar/Mode button. The display will show 0.0 (pressure value) and the LED will light up.

The pressure value is displayed for about 25 seconds. The display then returns to its original position. The pressure value can be displayed again by pressing the Bar/Mode button.

Fill the system with water, the pressure should be between 1.2 and 2 bar.

Carefully bleed all heaters (water flow should be continuous, without air bubbles).

Leave the cap on the air separator loosened during boiler operation.

Open the DHW taps to remove air from the DHW circuit;

Check that the pressure shown on the display is in the range of 1.2 - 2 bar, top up if necessary.

Starting the boiler Proterm Panther

Before starting the boiler check:

The main gas supply valve is open,
- gas cock open at the entrance
- closing valves (water, heating) at the outlet are open,
- the unit is connected to the mains.

To start the Protherm Panther boiler, do the following:

Switch the power switch to position “I”;

Set the extract air temperature to 85 °C and turn off the equithermal control (E-).

Check the condition of the room regulator (it must be closed);

Slowly raise the temperature in the heating system to the maximum (all radiators must be with open valves). The air in the water of the heating system is gradually removed through an automatic air separator. There must be no air at the highest point of the system and in the radiators;

Make up the system to a pressure of 1.2 bar;

Switch on the boiler again and heat the system up to maximum temperature;

Turn off the boiler, if necessary, remove the air and re-feed the system with water;

Make sure that after the heating system has cooled down, the pressure gauge shows at least 1.2 bar;

If the pressure in the heating system in the heated state is higher by. 0.5 bar than when cold, check the setting of the expansion vessel in relation to the system.

Protective functions of the boiler Proterm Panther

The boiler is equipped with a frost protection function. When the temperature drops below 10 °C, the pump will automatically turn on. When the temperature drops below 8 °C, the machine will fire up and work until the temperature rises by 25 °C. In case of freezing (the temperature of the RH is below 3 °C), the start of the boiler is blocked.

The pump switches on automatically for a short time if it has not been switched on for 24 hours. This provides protection against blocking due to deposits during a long shutdown. The pump runs continuously when the temperature rises above 85°C (overheating protection).

When the pressure drops, the LED flashes, when the pressure drops further, the unit goes out (protection against water loss - alarm F0). When the pressure rises, work automatically resumes.

The protective functions are activated only when the boiler is connected to the mains voltage (the electric cord is in the socket and the mains switch is in the on (I) position).

If the boiler has been disconnected from the mains voltage for a long time (a month or more), it is recommended to start it periodically (at least once a month). The boiler is equipped safety valve. When discharging heating water from the valve, turn off the boiler and disconnect it from the mains voltage.

Boiler adjustment Protherm Panther

When the boiler is operating without a room regulator, it maintains the temperature set on the display.

Adjustment operations:

– select the equithermal regulation mode – select the heating curve and set the symbol E-;

– select the equithermal regulation mode – in the option of parallel movement, put the symbol P-;

– select the EXH temperature mode and adjust it;

– the room regulator must be switched off, a jumper must be installed between the terminals for its connection.

When the Proterm Panther boiler is operating with a room regulator, it maintains the temperature set on the display. In this case, the unit is switched off by the commands of the room thermostat installed inside the control room. This room should not have a thermostatic valve on the radiator.

During installation, the jumper is removed from the boiler terminals and the room thermostat is connected. When operating in equithermal mode, the temperature changes depending on the change in the outside air temperature.

An external air temperature sensor must be connected to the boiler. The sensor is installed on the coldest wall of the building (northern or northwestern) at a height of about 2.5 - 3 m. The sensor should not be located in the area of ​​ventilation emissions from windows or other ventilation devices
and exposed to direct sunlight.

Inlet gas pressure control:

Switch off the boiler.

Loosen the screw on the pressure measurement fitting of the gas valve;

Connect an appropriate pressure gauge;

Carry out a launch;

Check the inlet gas pressure, if it is below normal, check the tightness of the gas pipeline;

Turn off the unit and disconnect the pressure gauge, carefully tighten the screw on the measuring point and check its tightness.

9

Boiler start

Warning: Putting the boiler into
operation and its first start-up should
be produced only by certified

Protherm specialist
specialized organization!

When starting the boiler for the first time, make sure
in that:

1. the boiler is connected to the electrical network and

while the phase and zero are not reversed.

2. the gas shut-off valve is open;
3. service taps for heating and hot water supply

4. The pressure in the heating system is

within acceptable limits of 1 - 2 bar.
Install the main switch (Fig. 1,
pos. 7) to the ON position (I). Boiler
turn on and start working
heating water in the boiler (if the boiler
connected to the boiler). After heating the water in
boiler, the boiler will switch to the mode
heating (provided that the mode
heating is active). In the event of a protective

boiler shutdown on the panel display
control will display a message about
faults (see "Messages about
errors”, page 8). With button
RESET (fig. 1, pos. 6) unlock
boiler. If, after switching on, the protective
shutdown will be repeated, or not possible
will unblock the boiler,
contact a service organization.

Boiler shutdown

When the boiler is switched off for a short time
install the main switch (Fig.
1, pos. 7) to the OFF (O) position.
When the boiler is turned off for a long time
period you need to turn it off
electrical network and shut off the supply
gas to the boiler. If in winter the boiler
not used, the heating system
needs to be emptied. However
frequent drains should be avoided and
replenishment of the heating system to avoid
scaling and deposits inside
boiler.

Starting and shutting down the boiler

Boiler adjustment

Operation of the boiler without room
regulator

according to the readings of the boiler sensor. AT
terminal block XT5 on terminals 5 and 6 is
jumper (factory setting). Order
settings:

Turn on the boiler with the main switch;
set the required temperature

supply line on the control panel.

Boiler operation with room temperature
thermostat

In this mode, the boiler supports
set temperature in the heating system
according to the room regulator. Jumper,
mounted in terminal block XT5 on clamps
5 and 6 are removed. In its place is connected
room regulator. If indoors
with room regulator on radiators
thermostatic valves installed
must be converted to full
open position.
Warning: On the control panel

Meaning

Malfunction on-
hand sensor
temperature

The boiler works without restrictions, but the temperature

The heating medium is controlled by the boiler sensor (see
"Setting the heating temperature", page 5).

If the boiler does not work in equithermal mode, then
such a message cannot appear.

For heating and hot water supply of apartments and small private houses with one bathroom, double-circuit gas boilers are usually used.

In large houses with several sanitary facilities for heating, single-circuit gas boilers with a storage boiler for preparing hot water are more often used. This system provides more comfortable use hot water in the house.

In the apartment of a new building with apartment heating, a double-circuit gas boiler Protherm Gepard 23 MTV is installed. Next, consider setting the boiler power using the example of this apartment.

Gas boilers of the Protherm Gepard series (Cheetah) are almost a complete analogue (simpler version) of Protherm Panther boilers (Panther). This article describes in detail the adjustment, setting the power of gas boilers Protherm Gepard and Protherm Panther.

It should be noted that the company that produces Protherm series boilers at its other plant produces gas boilers of the well-known Vaillant brand. Vaillant gas boilers are in a higher price category due to the use of better materials for the manufacture of heat exchangers. But in terms of design, other parts used, and service menu settings, Vaillant brand gas boilers are very similar to Protherm boilers.

The principles of adjustment, power settings described in this article suitable for many other gas boilers trademarks and manufacturers.

The internal arrangement of the double-circuit gas boiler Protherm Gepard 23 MTV and Panther 25.30 KTV (Panther)

Causes of clocking (pulse operation) of the boiler in heating mode

The instruction manual states that the useful heat output of the Protherm Gepard 23 MTV boiler is adjustable from a maximum of 23.3 kW. up to a minimum of 8.5 kW. The factory setting for heating power is set to 15 kW.

The total area of ​​the apartment heated by the boiler is 60 m 2. To heat the apartment, heating devices (radiators) with a total maximum heat output of 4 kW.

How to determine the maximum thermal power of the heating circuit in a house or apartment

How to determine the maximum thermal output of the heating circuit? On the websites of manufacturers and sellers of radiators, we find the thermal power of each radiator installed in the house. In the catalogs of manufacturers, the heat transfer of radiators is presented in 2 modes: 1) 90/70/20 degrees and 2) 75/65/20, you need to look at the heat transfer by the parameter “75-65/20”. The sum of the capacities of all radiators connected to the boiler will be equal to the maximum heat output of the heating circuit. For the apartment from our example, this value turned out to be 4 kW.

The installers installed the boiler and put it into operation, "forgetting" to carry out commissioning work. The boiler was started to work with the factory setting of maximum power in heating mode 15 kW.

Obviously, a heating system with a maximum power of only 4 kW., will not be able to accept the thermal energy produced by the boiler with a capacity of 15 kW. The power of the boiler burner is automatically regulated within certain limits. But the huge difference in the power of the boiler and heating devices leads to the fact that the boiler automation is not able to bring the boiler power in line with the needs of the heating system without additional settings.

A large difference between the power of a gas boiler and the power of heating appliances, among other disadvantages, leads to the cyclical operation of the boiler.

By the way, about other disadvantages of a too powerful boiler. The service manual for the Protherm Gepard 23 MTV boiler indicates its efficiency in heating mode: 93.2% at maximum heat output (23.3 kW.) and 79.4% when operating at minimum power (8.5 kW.) Imagine how the efficiency will decrease even more if this boiler has to work with a heating system with a capacity of 4 kW. Please note that a double-circuit boiler during the year most time works in the mode of heating, with the minimum power. At least 1/4 of the gas used for heating will literally fly out uselessly into the pipe. This will be a retribution for installing overly powerful equipment for heating and hot water in the house.

Tips on the topic "How to increase the efficiency of a gas boiler" can be found if you read this article to the end.

Excessive cyclicity, impulsiveness of work or, as the people say, “boiler clocking” manifests itself in the fact that the burner of the boiler, after switching on, quickly turns off upon reaching the set temperature in the straight pipe at the outlet of the boiler. But at the same time, the radiators remain not warmed up to this set temperature - the water heated in the boiler simply does not have time to reach the heating devices. That is, the boiler produces more thermal energy per unit of time than a less powerful heating circuit can accept. Therefore, the water temperature at the outlet of the boiler rises rapidly and it turns off earlier, not having time to heat the radiators.

After a short time, the circulation pump supplies the heat exchanger with the remaining cool water from the return pipe of the heating system and the burner turns on again. Then everything repeats again.

The heating system of high power has an increased diameter of pipes and the volume of radiators, and therefore a smaller hydraulic resistance. AT large systems water does not flow exactly the same, it flows faster, with a higher flow rate (liters per second). During the rapid passage through the boiler heat exchanger, each liter of water has time to heat up only 15-20 degrees about C. And in order to heat this liter to a given temperature, the water in the heating system must pass through the heat exchanger several times.

In low-power heating systems, the pipes are thinner, the radiators are smaller, the hydraulic resistance is higher and the water flows more slowly. If the same power is heated slowly flowing water, then the water that has entered the heat exchanger immediately, at a time, will heat up by 40-60 degrees about C, immediately to the maximum temperature, and the boiler will turn off. And the water remaining in the system, which has not reached the boiler, will remain cold until the next cycle of clocking. What happens in the boiler if its power is not adapted to the heating system.

The size of the flame (burner power) in the boiler is controlled by electronics according to a complex algorithm, which takes into account the time from the start of the burner, the temperature, the rate of temperature change in the heating circuit, and the temperature difference in the direct and return pipes. I do not know all the subtleties of the control algorithm, but automation, without additional service settings, does not ensure the normal operation of the boiler at a power below the minimum, which is indicated in the technical specification.

In a properly configured heating system, the temperature difference in the direct and return pipes should be no more than 20 about C.

Clocking reduces the life of the boiler and increases gas consumption

Any person, even not being a mechanic and electrician, knows that the most difficult operating mode for equipment is the moment of starting, turning on mechanical and electrical equipment. During the start-up period, the greatest wear is observed, most often failures occur. An increase in the number of starts as a result of cyclicity, most of all eats up the life of the very expensive parts of the boiler - gas and three-way valves, circulation pump, exhaust fan.

For ignition at the time of start, the maximum amount of gas is supplied to the burner. Part of the gas, until the moment the flame appears, literally flies into the pipe. Constant "re-ignition" of the burner further increases the gas consumption and reduces the efficiency of the boiler.

Some cyclic operation of the gas boiler is provided for by the normal mode of its operation. For example, temperature control in a room without a thermostat or with a two-position thermostat occurs due to the periodic switching on and off of the boiler burner.

The task of regulating the power of the boiler is to to exclude excessive cyclicity - clocking caused by the lack of adaptation of the boiler settings to the heating system.

To eliminate boiler clocking, it is necessary to equalize the power of the boiler and the heating circuit

You can do this in two ways:

1. Reduce the power of the boiler burner to a level at which the automation can ensure the normal operation of the boiler with the heating system connected.
2. Increase the maximum power of the heating circuit by installing additional radiators or replacing existing ones with more powerful ones.

You can apply both methods at once. Reduce the difference between the capacities of the boiler and the heating circuit by replacing and installing more powerful radiators. And then, compensate for the remaining difference by adjusting the boiler power.

The second method is more expensive, but sometimes you have to choose it. The fact is that in order to save money, builders often install radiators in the house without a margin for thermal power. As a result, in order to maintain the required temperature in the premises, in frosts it is necessary to supply heating water to the radiators with a maximum temperature of more than 75 about C. At this temperature, decomposition (combustion) of particles of organic dust occurs on the radiators and an unpleasant smell appears in the rooms. Besides, heat coolant reduces the service life polymer pipes and other parts of the heating system made of plastic and rubber.

Sometimes, the power of radiators is simply not enough to maintain the required thermal regime even at maximum heating water temperature. Before adjusting the power of the boiler, I recommend determining the need, and, if necessary, increasing the power of the radiators by 30 - 100%, at least in the coldest rooms.

Top - standard temperature regime operation of the radiator in systems with plastic pipes. Below are the maximum heatsink temperatures for comfortable mild heat. To switch from standard mode to soft heat, the power (size) of the radiator must be increased by about 2 times.

The main advantage of low-temperature heating is the possibility of using modern technologies. We are talking about condensing boilers, solar collectors and heat pumps. They require the system to have low temperature heating water.

When replacing radiators, it must be taken into account that the expansion tank built into the boiler is designed for a water volume in the heating system of not more than 50 liters for the Gepard boiler, and 70 liters for the Panther. If the amount of water as a result of installing new radiators turns out to be greater, then an external expansion tank must be installed.

An external expansion tank is connected to the return line of the heating system closer to the boiler. The built-in expansion tank, in this case, is best taken out of action.

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Heating radiators

How to adjust the power of the gas boiler burner

The useful heat output of a gas boiler can be reduced by reducing the gas supply to the burner. Do this by changing the settings of the gas valve.

gas valve Honeywell boiler Protherm Gepard (Panther) - scheme of work.
EVS1— safety solenoid valve; EVS2— electric drive of the control valve; Vm- the stepper motor controls the gas flow through the control valve.

In modern Protherm Gepard and Protherm Panther boilers, the basic settings Honeywell gas valve are changed with a stepper motor. The stepper motor is controlled from the boiler control panel through the service menu.

It should be noted that the manufacturer in some versions of gas boilers Protherm Gepard (Panther), Vaillant, instead of the Honeywell gas valve, installs SIT 845 Sigma gas valve. Maximum and minimum power the burners of this valve are made by turning the adjusting screws located on the valve body. See page 2 below for details on adjusting the SIT gas valve.

The electromechanical devices of the boiler (electrovalves, stepper and conventional electric motors, sensors) are controlled by the microprocessor of the electronic control board in accordance with the programmed program. The settings of the boiler operation program can be changed on the control panel using two menus - a public user menu and a hidden service menu.

Access to the service menu of the boiler Protherm Gepard (Cheetah)

The Protherm Gepard boiler is controlled from the control panel through the public user menu. How the owner manages the boiler is written in the instruction manual.

On the control panel, you can call up another hidden menu - a service menu intended for specialists. The service menu becomes available on the display screen after entering the code.

Press and hold the mode button (1) for about 7 seconds; the display will change - a number will appear 0 . - Using buttons + or — (2), enter code, number 35 . — Confirm the code entry by pressing the mode button (1). After that, the display will show the 1st menu line in the form of symbols interspersed on the screen: d. 0.

- Using buttons + or — d.**.

- Press the “mode” button to change from menu line number designation “ d.**” to the parameter value (the display alternates between the “=” symbol and the parameter value). - Change the values ​​of the displayed parameters using the + or - buttons (3) on the boiler panel. — 3 seconds after the change, the new values ​​are automatically confirmed. To reset the display, press the "mode" button for 3 seconds. After 15 minutes of inactivity, the display returns to normal on its own.

Access to the service menu of the boiler Protherm Panther (Panther)

The control panel of the Protherm Panther boiler has some differences from the Protherm Gepard boiler. The boiler control panel has a hidden service menu, which becomes available when entering the code.

To access the service menu of the Protherm Panther boiler (Panther), you must: Press and hold the mode button (1) for about 7 seconds; the display will change. - By using buttons on the left + or — (2), enter the access code in the service menu - the number 35 in the left half of the display. — Confirm the code entry by pressing the mode button (1).

After that, the display will show the 1st line of the menu in the form of symbols d.00 with the menu line number in the left half of the display, and numerical value line parameter is in the right half of the display. - By using buttons on the left + or — (2), enter the number with the required menu line number: d.**.

To change the value of a parameter in the menu bar:- Change the values ​​of the displayed line parameters using buttons on the right + or — (3) on the boiler panel. — 3 seconds after the change, the new values ​​are automatically confirmed. To reset the display, press the "mode" button for 3 seconds. After 15 minutes of inactivity, the display returns to normal on its own.

The service menu commands and the procedure for setting the power of the Protherm Panther boiler (Panther) are similar to those given for the Protherm Gepard boiler.

Description of some service menu commands

Line d.00- maximum heat output (useful power) of the boiler in heating mode, kW. The range of possible parameter values ​​is from =9 to =23, factory setting= 15 (for Protherm Gepard).

Line d.01- run-out time of the circulation pump in heating mode, min., choose a value between 2 and 60 min. Factory setting =5

Line d.02- Time delay after heating operation for anti-cycling, min. Prevents the burner from being switched on and off frequently in heating mode (this function is not applicable in DHW mode). Choose a value between 2 and 60 min. Factory setting =20 minutes. This delay (called the anti-cycling time) prevents a quick restart in heating mode after the burner has stopped at the set temperature or at the command of the room thermostat TA. It depends on the heat carrier temperature setting: — at 80 °C, it is set for 1 minute and is not adjustable. — at 20 °C, it can be adjusted from 1 to 60 minutes using the parameter d.02 in the service menu. At intermediate temperatures, between 20 °C and 80 °C, the delay value varies proportionally in the range from 1 min. up to the established d.02 parameter.

Dependence of the anticycling time on the setting of the parameter value in the line d.02 and heating temperature

Line d.18- operating mode of the circulation pump; Operating mode options: = 0 - with burner: the pump works together with the burner. =1 - continuously; with RT thermostat: the pump is switched on by the command of the room thermostat. =2 - permanent in winter: the pump runs all the time while the boiler is in the WINTER mode. Factory setting =1.

Line d.19- the speed of the circulation pump; Options for the operating mode: =0 - the burner is working; speed in heating mode is selected automatically, maximum - in DHW mode, minimum - if the burner is off = 1 - min. speed in heating mode, max. – in DHW mode =2 – automatically selected in heating mode, max. – in DHW mode =3 – max. speed in heating and DHW mode. Factory setting =2. Each time the burner is started in heating mode, the pump is switched on at a limited speed for at least 30 seconds. If the temperature difference between supply and return reaches 20 OK, the pump switches to maximum speed until the burner is switched off (even if the temperature difference has decreased). The same cycle occurs at the next ignition.

Line d.35- shows the position of the 3-way valve, heating/DHW (read only); =99 - hot water =0 - heating =40 - middle position

Line d.36- shows on the display the flow of hot water measured by the flow sensor, l/min. when dispensing hot water (read-only)

Line d.40- shows on the display the temperature of the water at the outlet of the boiler, in the direct pipeline of the heating system, about C. (only for reading)

Line d.41- shows on the display the temperature of the water at the inlet to the boiler, in the return pipeline of the heating system, about C. (only for reading)

Line d.44 - Ionization current control. This parameter informs that the ionization current is in the optimal range. The displayed value does not represent the actual current value! Value range: 0 - 10. In the range: =0 - 4 - ionization current is sufficient - the flame is available; \u003d 4 - 8 - ionization current is slightly below a sufficient level - there is a possibility of losing the flame; =8 - 10 - ionization current does not correspond to a sufficient level - there is no flame.

Line d.52- setting the minimum power of the boiler burner by shifting the minimum position of the Honeywell gas valve stepper motor. The range of possible parameter values ​​is from =0 to =99. How less value parameter, the weaker the intensity of gas combustion.

Line d.53- setting the maximum power of the boiler burner by shifting the maximum position of the Honeywell gas valve stepper motor. The range of possible parameter values ​​is from =0 to =-99 ( negative values with a minus sign). The smaller the value of the parameter, the weaker the intensity of gas combustion.

Line d.62- lowering the heating temperature at night. Setting range 0 - 30 about C. If you connect a timer or even a manual switch to the boiler, you can switch the boiler into two modes: day or night. In night mode, the heating temperature setting is reduced by the value set in d.62. Those. during the day the temperature of the heating water and the temperature in the house is higher, and at night it is lower. You can set it up the other way around.

Line d.67 - Display of the time between switching on the boiler. This parameter displays the cooling down time in minutes before the boiler is switched on again. The countdown of minutes starts at the moment the boiler is switched off due to the excess of the maximum operating temperature of the heating water on the boiler control panel and the room regulator is permanently closed. This parameter is important for the anti-cycling function of the boiler, when the cooling time until the next start is calculated on the basis of the set heating water temperature of the boiler and the set anti-cycling time interval in line d.02.

Line d.70 - Setting the position of the three-way valve. In this mode, it is possible to set the position of the three-way valve, regardless of the requirements for heating in one or another circuit. Position of the three-way valve: =0 - the valve is controlled based on standard requirements from the control system; =1 - three-way valve set to the middle position for emptying the boiler (both heating and hot water); =2 — the three-way valve is set to the position of the heating agent.

Line d.71— Setting the maximum temperature in the heating system. Select a value between =45 and =80 °C Factory setting =75 °C

Line d.88 - Water hammer protection in the distribution of cold water (for boilers KTV and KOV) . The ability to change the parameter leads to the elimination of the reaction to water hammer, which occurs in some cases in cold water pipelines. For example, at the moment the automatic valve closes in the toilet flush tank (or washing machine or dishwasher), a pressure surge (water hammer) may occur in the water pipes. This may result in a false operation of the tap water flow sensor (turbine), which will lead to a short-term unwanted activation of the boiler's DHW mode. Factory setting =0 - activation of the ignition process for heating tap water at a flow rate of 1.5 l/min Changing the parameter to the value =1 - activation of the ignition process for heating tap water at a flow rate of 3.7 l/min In this case, the duration of the flow must be at least 2 seconds.

Line d.90 - Identification of the connected room sensor. With this parameter it is possible to make sure that the room regulator is connected correctly, or the communication between the room regulator and the boiler is working properly. Note: This description only applies to controllers that support eBus communication. In the event that a conventional regulator with a switching relay was connected, this function not possible to use. Display: =0 - the regulator is not connected or does not communicate with the boiler; =1 - the regulator is connected and there is communication between it and the boiler.

Line d.96- Setting the boiler to the parameters set at the factory. If the setting results in wrong work or malfunctions, it is possible to restore the factory settings of the boiler. Setting: =0 - replacement with factory settings will not be performed; =1 - will return to the factory settings Note: when you enter the setting of this parameter, the display always shows the parameter "0"

How to eliminate boiler clocking in heating mode

Adjustment of the maximum heating power of the Gepard or Panther boiler through the service menu

At the first stage in the service menu, as described above, we find the line d.0, press the "mode" button and look at the display the value of the boiler power parameter, kW. In our example, the factory setting =15 was visible. It is necessary to set a new boiler power value equal to the power of the heaters connected to the boiler. This setting will only work in heating mode.

If the power of the heating system corresponds to the operating power range of the boiler

The maximum power of the heating system in the house may fall within the operating power range of the boiler specified in the instructions. For example, the total maximum power of radiators in a house is 11 kW. The operating power range of the Protherm Gepard 23 MTV boiler is within 8.5 - 23.3 kW.

In the service menu, as described above, we find the line d.0, press the "mode" button and look at the display the value of the boiler power parameter, kW. For example, the factory setting =15 will be visible. Using the "-" button, set the new value of the boiler power = 11.

I recommend trying to set the boiler power to 20 - 30% less than the heating circuit power, for example, d.00 = 9 kW. This power should be enough to compensate for the heat losses of the house, since the power of radiators, as a rule, is chosen with some margin.

Increasing anticycling time

On the second stage, increase the anti-cycling time in the line d.02 service menu.

Factory setting d.02 =20 minutes. According to the graph (see above), we determine that, for the heating water temperature set on the display 70 about C, the burner can be restarted after 4 - 5 minutes, not earlier.

In line d.02 set a new anticycling time value, for our example, the maximum possible = 60 minutes. Line d.67 shows the time in minutes until the next switching on of the boiler. Breaks in the operation of the burner became approximately 10 minutes long. Twice as much as the factory setting, which is still too common.

Increasing the anti-cycling time causes the burner to start later, at a lower heating water temperature. The heat input from the boiler to the heating circuit is reduced.

In this way, selecting boiler power and anti-cycling time settings through the service menu, ensure that the duration of the cycle between switching on the boiler burner is at least 15 minutes. That is, the boiler should turn on within one hour no more than four times.

I note that not all brands of gas boilers have the ability to adjust the anti-cycling time. In this case, it is necessary to select only the boiler power settings.

On some brands of gas boilers, the rotation speed (capacity) of the circulation pump is set manually by a switch on the pump. To reduce the boiler cycle, it is recommended to increase the pump speed.

Setting the Gepard or Panther gas boiler to power below the minimum

At the third stage setting is in progress the minimum power of the boiler, by an amount lower than that specified in the instructions.

Such a setting is not necessary in all cases, but only when the first and second stages do not bring the desired result. As in our case, when at the first stage, using the "-" button, we set a new boiler power value = 9 (the minimum possible setting, corresponds to 8.5 kW.). The newly set value of the maximum heating output of the boiler (8.5 kW) is still very different from the power of heating devices (4 kW).

It should be noted that setting the boiler power according to the method described below is also useful in other cases, since it allows, through the experiment, to adjust the heating power of the boiler in accordance with the actual power of the heating circuit. The actual power is usually less than the calculated one.

Before work for setting the minimum burner power, necessary:

• Fully open the thermostatic and other valves on the radiators, and set the room thermostat to the maximum temperature. The thermostat that controls underfloor heating is set to the maximum allowable temperature so as not to overheat the floors.
• In the user menu of the boiler, set the maximum operating temperature, which the owners set in the very cold, adding another +5 °С. Usually it is not less than 65 °С. If the owners do not remember it, or on a new boiler in the menu, the factory setting of the maximum temperature is set to 75 °С. The boiler burner should automatically turn off at a temperature of 5 °С more, i.e. at 80 °С.
• Cool the heating circuit to a heating water temperature below 30 °C.

Next, start the burner in heating mode, select the line in the service menu d.52, press the “mode” button and see on the display the value of the gas valve stepper motor position parameter in the factory minimum power mode.

Having removed the front cover of the boiler, we visually observe the size of the flame in the burner. In our example, the display showed the factory setting, the number = 72, and the height of the flame in the burner was large enough.

Use the "-" button to set a new parameter value in the line d.52, for example =20. 3 seconds after the change, when the new value is automatically confirmed, we observe a significant decrease in the height of the flame in the burner. This indicates that the useful output of the boiler with the specified setting will be greatly reduced.

Further, the temperature increase in the direct heating pipeline at the outlet of the boiler is observed on the display. Typically, the temperature rise stops when it reaches some value less than the set value, for example 52 °С. The boiler is running but the temperature is not rising (or changing very, very slowly). This means that a power balance has been reached between the boiler and the heating system at this steady water temperature. At this moment, we increase the parameter in line d.52 of the service menu, set a new value = 30 - the temperature starts rising again and stops again, for example, at 63 °С. Again we add the value of the parameter in the line d.52 = 35 and so we select the parameter until the temperature stops at a value slightly higher than the maximum, for example 77 °С. Thus, a balance is achieved between the power of the boiler and the heating circuit at maximum operating temperature. The boiler output will be set to the minimum required for operation with the connected heating circuit. In this case, the cycling of the boiler will be minimal.

If the radiators do not warm up well in height, the temperature difference in the direct and return pipes at a maximum temperature is more than 15-20 °, then the bypass valve actuation pressure is increased. See below for how to adjust the bypass valve. The temperature of the water in the forward and return pipelines can be seen on the display if you enter the service menu, lines d.40 and d.41.

In case of adjusting the bypass valve, the setting of the gas valve in line d.52 must be repeated.

In our example, the burner heated the water to a maximum temperature of 77 about C at minimum value parameter in line d.52 equal to =28 (factory setting was =72). With a lower value of the parameter, the burner could not heat the water to the specified temperature. And when greater meaning the burner heated the water to 80 ° C and the boiler automatics turned off the combustion.

It should be noted that the gas valve adjustment method described above, which allows balancing the boiler power with the heating circuit power through the experiment, is not included in the recommendations of the boiler manufacturer. This is the idea of ​​the author of the article, successfully implemented when setting up autonomous systems heating with gas boilers.

Gas valve factory calibration

Honeywell gas valve. 1 - fitting for measuring gas pressure at the outlet to the burner; 2 - fitting for measuring pressure at the inlet.

The boiler manufacturer prescribes to calibrate the minimum power on the gas valve as follows:

In line d.00 of the service menu, set parameter =9, which limits the boiler output to minimum level specified in the instructions. Turn on the boiler in heating mode.

A manometer tube is connected to the upper fitting at the outlet of the gas valve. Before connecting, it is necessary to unscrew the locking screw on the fitting by 1-2 turns.

call string d.52 service menu. And changing buttons + and — string parameter value d.52, set the minimum pressure at the outlet of the gas valve, indicated in the boiler manual. For example, for the Gepard 23 MTV boiler, the minimum pressure in front of the burner is 1.5 mbar or 15.5 mm w.c..

This setting will ensure the operation of the boiler with a minimum power specified by the manufacturer - 8.5 kW. To the obvious question of what to do if the power of the heating circuit connected to the boiler is less, the service instructions of the boiler manufacturer do not give an answer.

In our example, after setting and setting in the line d.52 parameter =28, pressure measurement at the outlet of the gas valve in front of the burner showed a value of 4 mm w.c.

Readers in the comments ask the question: “Isn’t such a significant decrease in gas pressure on the burner dangerous for the boiler?”. Boilers have many different defenses but no protection against low pressure burner gas. From this we conclude that low pressure in itself is not dangerous for the boiler. It is important to ensure stable ignition and stable combustion of gas, as the boilers have appropriate protections.

The home master can roughly estimate whether the gas valve settings correspond to the factory settings without resorting to measuring the gas pressure at the valve.

To do this, in line d.00 of the menu, set the parameter =9 and turn on the boiler in the mode of minimum heating power. Record gas meter readings. After 15 minutes (1/4 hour), the meter readings are recorded again and the gas flow rate during this time is determined. For example, we determined the gas consumption of 0.289 by the meter m 3 /15 min. Multiply this value by 4 and get the gas consumption per 1 hour in the minimum power mode 1.156 m 3 / hour. Compare the obtained value with the data of the factory instructions. For example, the standard gas consumption in the minimum power mode for the Gepard 23 MTV boiler is 1.15 m 3 / hour. Gas consumption according to the meter readings approximately corresponds to the factory norm. We conclude that the setting of the gas valve in the minimum power mode complies with the requirements of the factory instructions. If not, then the gas flow is corrected by changing the parameter in line d.52.

Similarly, according to the gas flow, you can evaluate the setting of the gas valve at maximum power by switching the boiler to the DHW mode.

Power 23.3 kW. corresponds to the maximum pressure at the outlet of the valve 85 mm w.c.

U - figurative manometer

A simple manometer for measurements on a gas valve can be made from a transparent plastic tube, filled with water and bent in the shape of a U. One end of the tube is put on the valve fitting, and the other is left open. The ruler measures the difference in water levels in the branches of the tube. The measured distance will be equal to the pressure in millimeters of the water column - mm w.c..

On the gas valve fitting, you can tightly pull a tube with an inner diameter of 8 mm. For a tube of a different diameter, you will have to select an adapter.

At the end of the measurements, do not forget to carefully tighten the screw on the measuring nipple and check its tightness.