If there is no possibility of connecting to the gas network, and solid fuel heating is not available, then an electric boiler becomes an alternative way to provide the house with heat. This article will introduce readers to the Proterm Skat electric boilers, as well as provide instructions on how to start them.

Electric boilers Proterm Skat

This single-circuit equipment is made in wall variation. It is possible to connect a water heater. Most models three-phase mains connection required, but models with a capacity of 6 kW and 9 kW can operate from a 220 V. It is also controlled by a thermostat or an outside temperature sensor.

To create a certain level of heat, the parameters are adjusted individually. The power supply is controlled remotely from the tariff meter. For domestic needs, you can install units of 24 kW and 28 kW in a cascade.

Protherm Skat has:

two-way pump;
expansion tank;
safety valve;

Also, the Protherm boiler can be connected via a voltage stabilizer. Electric boiler in action slow start, that is, for two minutes it "accelerates" and its power is minimal. The heating elements are protected from overload, their work is uniform, this is achieved by the ability to adjust the rhythm (1.2 or 2.3 kW).

Electric boilers Protherm Skat are lightweight (only 34 kg) and convenient dimensions, which makes it possible to install on almost any area. The boiler operation is reliably protected by several functions:

pump blockage protection;
a pressure sensor that monitors the water pressure level;
frost protection;
protection against blocking the valve and freezing of the water heater (when connecting the boiler).

If errors occur in the operation of the boiler, automatic diagnostics occurs, ending with the display of the results in the form of a code. The explanation of the codes is given in the operating instructions for the product.

Advantages and disadvantages of electric boilers Protherm Skat

Proterm Skat has a number of advantages over other types of heating:

does not carry out harmful emissions into the atmosphere, since does not have combustion products, therefore, this type of heating can be called environmentally friendly;
an electric boiler is an affordable type of heating. It is used where it is not possible to connect to the network gas or can become an alternative form of heating;
does not need systematic maintenance, unlike, for example, gas or solid fuel models;
silent work;
there is a heat level regulator;
able to adapt to domestic water of poor quality;
resistant to voltage drops;
equipped with several types of protection.

Along with the advantages, some disadvantages are noted:

the electric boiler Protherm Skat needs to be connected through a stabilizer;
unable to do its job when the mains power is cut off.

Consumer reviews

Consumers note that Protherm Skat provided an opportunity where it was problematic or even impossible to connect gas. With the stable operation of the power grid, many refuse to connect the gas, while saving considerable amounts of money. In addition, an electric boiler is used in parallel with a gas unit, connecting them to a single heating system. This find allows you to significantly save money on resources, alternating them with each other during the heating season.

If you connect a water heater to Protherm Skat, consumers will be able to use hot water. Many people note the perfectly developed boiler design, which fits well into any room interior. It can be successfully installed in living rooms, thanks to its silent operation, it will not cause increased attention to itself.

The disadvantages are that when using only an electric boiler, when it is turned off, there are no alternative heating options. Therefore, before making a purchase of a Protherm electric boiler, you should make sure that there are no problems with electricity. Experts recommend use a voltage regulator, to ensure the conditions for normal operation of the Protherm Skat boiler.

In addition, the increased energy consumption of an electric boiler causes negative emotions among the population, since paying bills is very expensive. If we compare the costs of gas and electric heating, then the Protherm electric boiler costs a little more, with identical heating parameters. From the above, we can conclude that this electrical equipment is chosen by those who do not have the ability to connect to the mains gas, as well as those who care about the environment and see it as a source of ecological consumption.

How to start the Protherm Skat boiler?

To start up the boiler, follow the instructions below.

When the pressure is low, the “bar” light starts flashing on the display. To remedy the situation, add water to the system. If in this case the pressure decreases, then you need to contact a specialist.

If you need to stop the Protherm boiler for a long time, you need to disconnect it from the power supply and turn off the taps. If you need a stop in winter, then water must be drained from the system to prevent freezing.

How to care for a Protherm electric boiler? Do not use abrasive or chemical substances. Better to wipe the surface of the case with a damp cloth, then dry the surface.

Any malfunctions are indicated on the display by an error code. Code numbers are found and decoded in the product passport.

If a serious malfunction occurs, for example, the heat exchanger is frozen or water is dripping from it, it is forbidden to turn on the electric boiler into the power supply. It is necessary to wait for a specialist who will diagnose and make a quality repair. Parts are replaced only with original spare parts.

So, dear readers, you have met with the alternative type of heating Protherm Skat. When gas and solid fuels are out of reach or you are an adherent of cleanliness, an electric boiler can be a good help.

Electric boiler Proterm A ramp for heating is the most common model in Russia among all manufacturers on the domestic market. Good quality European assembly and reliability of components, many positive reviews for Protherm electric boilers and reasonable prices contributed to their popularity among buyers, both in Russia and abroad.

To understand the advantages and disadvantages of Slovak heating equipment, it is necessary to disassemble the technical characteristics and device of wall-mounted electric boilers Proterm of the Skat series, the model range on the market, and connection features. Let us also consider the problems and malfunctions that may arise during the operation of the device, errors and methods for their elimination.

Model range of electric boilers Proterm Skat, type K (KR)

Today the Slovak company "Protherm" is represented on the Russian market not only with its boilers, but also with eight models of electric boilers of the Skat K (KR) type, differing in power consumption and connection to the electrical network. Country of origin of water heaters - Slovakia.

The company produces only single-circuit devices capable of heating a private house with a total area of 30 to 280 m2. Among them, stand out as single-phase - with the ability to connect to a 220 V power grid, and three-phase - 380 Volts.

Electric boiler Proterm: photo

The main difference between electric boilers of this model range is their rated power, which can be 6 or 9 kW, 12, 14 or 18 kW, 24 and 28 kW. Depending on the model chosen, these are units:

- low power: Skat 6K and 9K;
- medium power: Skat 12K, 14K and 18K;
- high power: Skat 21K, 24K and 28K.

The operation of the Proterm electric boiler is controlled by means of special buttons made in the form of multidirectional arrows on the front panel of the heater.

They can set the required water temperature in the heating system, as well as in a remote indirect heating boiler, which is purchased when it is necessary to obtain hot water for household needs. In addition, the button " Mode / Ok»You can turn on (set) the desired operating mode of the electric boiler:

- traditional mode for heating (25-85 ° С);
- "warm floor" mode (30-45 ° С);
- hot water preparation mode in an indirect heating boiler (35-70 ° С).

The multifunctional LCD display informs about the temperature in the heating circuit and the boiler, as well as about problems and errors in the operation of the boiler in case of any malfunctions. Above the display there are lamps that light up depending on the set operating mode of the device, changes in power consumption and insufficient water pressure in the system.

By default, all Protherm electric boilers are 3-phase, however, low-power 6 and 9 kW models (Skat 6K and Skat 9K) can be connected to a single-phase 220 V network. Medium power devices are designed for heating houses with an area of up to 180 m2, and high-power boilers - more than 20 kW can be installed in private houses or other premises with a total area of up to 280-300 m2. We look at the table.

Proterm Skat: cable cross-section, energy consumption

Features of the device of the electric boiler Proterm

The heating device consists of several main elements necessary for its full operation.

1. Copper heat exchanger of cylindrical shape for heating the coolant.
2. Block of heating elements made of copper of different power and quantity with multistage switching.
3. Expansion tank 7 liters to compensate for thermal expansion in the heating system.
4. Hydraulic group consisting of:

- three-speed circulation pump;
- safety valve for 3 Bars;
- automatic air vent.

In addition, an NTS temperature sensor is installed on the heating circuit line, as well as an emergency sensor that protects the unit from overheating. There is a system for protecting the device from freezing. and from blocking the circulation pump.

Electric heating elements are mounted in the heat exchanger of the Proterm boiler, top and bottom. Depending on the model, the number of heating elements may be different. For example, Skat 6K, 9K, 12K and 14K have two heating elements, Skat 18K and 21K have three heating elements, 24K and 28K have four. For each model, the heating elements blocks have different power.

I propose to disassemble in detail the internal structure of the hinged electric boiler "Proterm Skat" according to the instruction diagram:

Internal device "Protherm Skat" according to the instructions

1 - heating block;
2 - valve for air discharge;
3 - heat exchanger;
4 - pressure sensor;
5 - safety valve;
6 - regulator for setting the circulation pump;
7 - pump status LED;
8 - grounding at the "return";
9 - grounding on the body of the water heater;
10 - pump for circulation;
11 - electrical cable connection;
12 - contactor;
13 - electronic board;
14 - NTS temperature sensor;
15 - emergency temperature limiter sensor.

Electric boiler connection: water circuit, cable

Connecting an electric boiler Protherm

1. As with most modern wall-mounted heating devices, all the connectors for connecting the boiler are located at the bottom of the body. This is done to save space in the room where the electric boiler is installed.

2. The heating water circuit is connected using two 3/4 ″ threaded unions. On the left there is a return line (coolant inlet into the boiler), on the right - a straight line (outlet).

3. Nearby: an overflow for a safety valve, a drain valve, as well as connectors for connecting electric cables of different cross-sections. You can monitor the pressure in the heating system by reading the pressure gauge, which is also located in the lower part of the device body.

Electric boilers Proterm Skat: technical characteristics, dimensions

Proterm boilers have rather compact dimensions of 410 x 740 x 310 mm, which allows them to harmoniously fit into the interior of even a very small kitchen or boiler room. We look at the rest of the technical characteristics in the table.

Technical characteristics of electric boilers Proterm

Errors and malfunctions of the electric boiler Proterm: methods of troubleshooting

1. Error code F00, F10, F13, F19.

These codes tell us about a malfunctioning NTS temperature sensor. You may need to replace it or replace the electronic board. But first, check the cable connections to see if they work.

2. Error F20.

Defective temperature limiter alarm or thermal fuse. Try to short-circuit them one by one. If the boiler shuts down again, replace the faulty element.

3. Error F22.

This error indicates a dry start of the electric boiler. Add the water pressure in the system, it must be at least 0.6 bar. The presence of air in pipes and radiators is also possible.

4. Error code F41 and F55. A relay or contactor has jammed. Check these parts for defects.

5. Error F63. No communication with EEPROM. Reset the settings to factory defaults.

6. Errors F73 and F74.

Errors under these codes indicate problems with the water pressure sensor. You need to check the contacts or replace the sensor itself.

7. Errors F85 and F86. Water freezing in the electric boiler itself (F85) or in the indirect heating boiler (F86).

Wiring diagram for connecting boilers Proterm Skat

Wiring diagram for connecting the boiler Proterm Skat 6, 9, 12, 14K

Advantages of electric boilers Proterm:

- build quality and operational reliability;
- a wide range of different capacities;
- modern security system;
- high efficiency of 99.5%;
- the ability to connect additional options and equipment;
- good reviews from buyers and specialists.

Disadvantages of an electric boiler brand Proterm:

- lack of a room device in the complete set;
- there are no models with a built-in boiler for heating utility water;
- it is not allowed to use an antifreeze liquid as a heat carrier;
- price from 35,000 rubles.

We examined in detail electric boilers Proterm Heating slope, the whole range and technical characteristics. Having disassembled the internal device according to the instructions for use, we revealed the main advantages and disadvantages of these devices. And also focused on possible errors in the event of malfunctions and some ways to fix them with your own hands. Watching the video.

The well-known Slovak company Protherm has won trust due to the high quality and reliability of the equipment produced. Careful study of the needs of buyers, trends in demand for various models of manufactured devices allowed the company to gain a leading position in the market.

The company produces dozens: floor-mounted and wall-mounted, and with open and closed combustion chambers. Particularly popular are the two-circuit wall-mounted gas boilers Proterm, to which this article is devoted.

Description of the double-circuit boiler Proterm

Boilers that have the function of heating service water are called double-circuit, because they heat water for two systems - a heating circuit and a hot water supply system (DHW).

The DHW system in such boilers, if necessary, can function separately from the heating system. This mode is necessary to supply the house with hot water in the summer.

Wall-mounted double-circuit models are presented in a wide range of capacities - from 11 to 30 kV, which allows the buyer to choose the best option depending on the heated area.

In wall-mounted boilers, a mechanism is provided for releasing the combustion chamber from exhaust gases. This is done in two ways. The first is the forced removal of residual gases using a fan, such a combustion chamber is called closed. The second option is that gases are given the opportunity to independently leave the room through the chimney, this chamber is open.

All Proterm products are equipped with the most modern automatic control, management and protection systems.

Distinctive features

By installing a Proterm double-circuit gas boiler in your home, you will become the owner of a real home boiler room, which, in addition to the standard functions, will provide your household with hot water.

The following are the main distinguishing features of the Proterm line of gas boilers:

profitability, ease of use;
a large selection of models - in terms of price, power, functionality, protection capabilities;
price-quality ratio - one of the best among manufacturers of similar equipment;
high efficiency (over 90%);
models with built-in boiler are available.

Important! Gas boilers Proterm are adapted for Russian conditions - they can function normally even with reduced gas or water pressure in the mains.

Gas boilers produced by Proterm during operation will not disappoint you and will meet the most daring expectations.

Model range of boilers Proterm

The range of heating boilers offered by Proterm is wide and varied. The catalog of manufactured products includes:

electric boilers;
solid fuel, wood-fired and coal-fired;
universal units that can run on gas and diesel;
industrial boilers of increased power;

The range of gas boilers Proterm includes two types: and. The company manufactures gas boilers ranging from small wall-mounted devices weighing 30 kg to heavy floor-standing units, the most famous of which is the Proterm two-circuit gas boiler model Medved 30 KLZ weighing 155 kg.

As for double-circuit wall-mounted devices, there are 5 series of them:

Panther (Panther).
Jaguar (Jaguar).
Lynx (Rys).
Cheetah (Gepard).
Tiger (Tigr).

Each series includes several models that differ in power, performance, price and some other parameters. In particular, the devices of the Panther, Cheetah and Tiger series include models with both closed and open combustion chambers. A typical representative is the Proterm Panther 25 KTV double-circuit gas boiler with a capacity of 25 kW, which has a device for forced removal of exhaust gases from a closed chamber.

Specifications

The main technical characteristics, for ease of comparison and speeding up the search for the necessary information, are summarized in Table 1.

Model	Panther	Jaguar	Cheetah	Tiger	Lynx
Characteristic	25 KOV, 25 KTV, 30 KTV	11 JTV, 24 JTV	11 MOV, 11MTV, 23 MOV, 23 MTV	12 KOZ, 12 KTZ, 24 KOZ, 24 KTZ	18/25 MKV 25/30 MKV
The combustion chamber	T-closed O-open	closed	T-closed O-open	T-closed O-open	closed
Heating water temperature, ° C	35-85	30-85	30-83	45-85	30-85
DHW temperature, ° C	38-60	30-64	38-65	40-60	30-64
OV expansion tank, l	7,0	7,0	5,0	8,0	8,0
Expansive hot water tank, l	–	–	–	2,0	5,0
DHW productivity, l / min	up to 17.0	up to 10.7	up to 11	up to 12.6	up to 14.2
Natural gas consumption kg / hour	2,84 – 3,44	–	2,73	1,41 – 2,84	–
Liquefied gas consumption, kg / hour	2,08 – 3,21	–	1,9	0,91 – 2,08	–
Consumption of natural gas hot water supply cubic meters / hour	–	2,73	–	–	1,39-3,08
Liquefied gas consumption for hot water supply, kg / h	–	1,02	–	–	1,02-2,26
Consumption of natural gas OV cubic meters / hour	–	1,39 2,73	–	–	–
Consumption of liquefied gas ОВ, kg / h	–	0,55 1,02	–	–	–
Storage tank, l	–	–	–	45	–
Weight, kg	34 – 41	29 – 30	31 – 34	70 – 71	35 – 36
Dimensions, mm	800x338 * 440	700х280х410	740x310x410	900x410x570	700x280x390
Price, thousand rubles	45 – 53	27 – 32	34 – 39	50 – 130	54 – 56

Abbreviations: ОВ - heating water, DHW - hot water supply.

Explanation of the code in the model name:

a two-digit figure corresponds to the nominal power consumption in kW;
the first letter - in combination with the third, designates the model;
the second letter is the type of combustion chamber: O - open, K, T - closed;
the third letter is the type of boiler: V, Z - double-circuit, O - single-circuit.

In addition to the parameters indicated in the table, all wall-mounted double-circuit boilers have a number of characteristics. In particular, they have the following protection systems:

safety valve for dumping the coolant when the pressure in the system rises;
protection of the circulation pump from jamming;
protection of water pipes from freezing;
gas control - stops the gas supply to the burner if the flame suddenly goes out;
air vent - getting rid of the trapped air from the heating system;
protection of the boiler against overheating by means of a thermostat.

The electronic control system for gas boilers performs the following functions:

microprocessor control;
device status control;
room temperature regulation;
display of current readings of temperature and codes of malfunctions.

Maintenance by service center

Annually, preferably before the first start-up after a summer break, it is recommended to invite a specialist from a certified service organization to inspect and check the boiler. During a routine inspection, the condition of the gas burner is checked, the power is adjusted, the burner nozzles and heat exchangers are cleaned. A particularly important part of the inspection is checking the operation of the emergency thermostat and the combustion chamber thermostat.

Attention! When cleaning the gas burner nozzles, their inner diameter must never be changed!

Boiler maintenance by the user

Cleaning the casing of the unit without removing the protective cover. Should be carried out after disconnecting the device from the network. Power supply is allowed only after complete drying.

The water pressure in the heating circuit must be checked weekly. If necessary, make up after the unit has cooled down to below 400 ° C.

It is necessary regularly, at least once every three months, to check the tightness of the chimney system connections, the cleanliness of the filter and the dirt collector, and remove dirt if necessary.

If a gas leak is detected, the device must be turned off immediately, the gas valve must be closed and a specialist of the service organization must be called. It is not recommended to repair the unit yourself. For example, the operating manual for the wall-mounted double-circuit gas boiler Cheetah produced by Proterm does not recommend trying to fix the malfunction yourself, so as not to lose the company's guarantees.

The gas boiler Protherm (Proterm) is produced by the well-known company Protherm, founded in Slovakia more than a quarter of a century ago. The model range of this manufacturer is characterized by a successful combination of the level of heating power and indicators of energy efficiency.

Model range of Protherm boilers - single-circuit and double-circuit

Proterm gas equipment is produced by a European manufacturer in several modifications, which allows you to choose the model that is optimal in terms of functionality, as well as a practical and most convenient model in operation.

Wall type

Wall-mounted gas equipment has undeniable advantages, including compact size, external aesthetics, excellent operational properties, the ability to adapt to operation with different energy carriers by means of a standard nozzle replacement, as well as cost effectiveness.

"Panther". Inexpensive model with two heat exchangers and water heating. A modern heater with the ability to operate in a closed system. It has reliable frost protection, automatic gas cut-off and pump control.

Inexpensive heater option in the Protherm line

"Jaguar". A low-cost option of equipment that does not have a winter / summer mode. Double-circuit unit with a closed type of combustion chamber and control by means of handles.

Simple model with the minimum required set of functions

"Cheetah". Double-circuit turbocharged boiler with a capacity of 11-23 kW and a closed combustion chamber. Even low-power models are capable of heating 10-11 liters of water in one minute. A wall-mounted device in which the movement of the heat carrier is carried out forcibly.

Turbocharged boiler with high efficiency

"Tiger". It features a neat appearance, informative LCD display and very simple operation. There is a possibility of programming for different modes of operation or functioning in the automatic mode "comfort". There is a possibility of automatic regulation of the combustion process, it is distinguished by a special ignition system.

Compact equipment with different operating modes

Main characteristics of the boiler

Floor type

Floor standing single-circuit and double-circuit boilers have several advantages that make this type of equipment in demand among consumers. It is impossible to ignore high performance indicators, maximum heat transfer efficiency, economical fuel consumption, wide functionality and guaranteed durability.

"Bear". The high quality cast iron heat exchanger makes the unit durable and very reliable. The model has a "Winter-Summer" mode and convenient traction control. It has automatic regulation of the combustion process and is distinguished by a special ignition system.

Cast iron heat exchanger assumes long-term boiler operation

"Buffalo". An easy-to-use and durable boiler with high efficiency, capable of operating on various types of fuel. A very powerful unit with a high degree of reliability.

Powerful equipment that can run on different types of fuel

The main characteristics of the Bison model

Floor standing boiler with reliable heat exchanger

Main characteristics of the model

Stationary heating gas boiler

Main characteristics of the model Bear KLOM17

Gas boiler device Proterm

Various modifications have individual characteristics of the device.

The manufacture of boilers using low-temperature cast iron contributes to the effective minimization of heat losses. A feature of the device of heating devices of the brand "Proterm" is also an unusual, rather environmentally friendly way of burning fuel.

The main units of gas heating equipment are:

ignition system;
burner;
heat exchanger.

The heat source is represented by the flame of the burner, in which the gas is burned, and the heat exchanger is responsible for heating the heat carrier. The gas supply process is controlled by a thermostat, while the combustion products, represented mainly by water vapor and carbon dioxide, are removed through the chimney system.

Proterm boilers are used for heating and hot water supply

How to connect and configure

Basic conditions for the installation of gas heating equipment from the manufacturer "Proterm":

the installation of the boiler and the necessary auxiliary equipment is carried out in accordance with the project documentation, taking into account the requirements of SNiP and the manufacturer's recommendations;
installation of equipment is carried out in a room specially designed for this purpose, and with a special modification of the unit - exclusively in well-ventilated annexes;
the process of installation and commissioning is carried out by specialists who have completed the training course for the installation and maintenance of gas equipment;
elimination of any boiler malfunctions is performed by a service organization authorized by the manufacturer of heating and hot water equipment;
independent work on installation entails depriving the consumer of the warranty for the unit and its repair;
When unpacking the heating equipment, the completeness of the supplied boiler and the compliance with the type of fuel used must be checked.

Before proceeding with the installation, you need to carefully read the attached instructions, and during the installation process, all the recommendations given in the accompanying documents must be observed. Equipment markings must not be damaged or removed.

Standard technology for connecting and setting up a gas boiler:

fixing the unit to the wall is carried out by means of screws with appropriate gaskets;
nozzles for connection should not be loaded with a pipe heating system, a hot water system or gas supply elements;
the installation dimension of the connection of the pipes, including their height and the required distance from inlet to outlet, must be strictly observed;
the placement of the hydraulic group is carried out on the lower part of the gas equipment, and the system is necessarily equipped with a filling valve and safety and relief valves;
in conditions of exceeding the maximum pressure indicators inside the system, steam or water is discharged from the safety relief valves;
connecting the unit to the heating system presupposes the ability to carry out the full scope of preventive maintenance and repair work;
water is delivered to the heating system by means of a filling tap, and a drain device is used to lower the pressure or partially drain the heat carrier;
full-fledged drain and filling functions are possessed by special exits installed on dedicated sections of the heating system;
the pressure of the hot water supply at the supply to the equipment must exceed those in the heating system;
in the position of the valve "Filling" (hydraulic group), it is imperative to check the operation of the system by means of a boiler pressure gauge;
valves are opened counterclockwise and closed strictly clockwise.

The items of boiler equipment maintenance under warranty do not include measures presented by de-airing and adjusting the expansion tank.

Video: Connecting the boiler Proterm

Video: Configuring Protherm Equipment

Brief operating instructions

Competent setting of gas boilers Protherm provides optimal temperature conditions in rooms of different purpose and area. Among other things, the regulation of the automation of such equipment contributes to an increase in the efficiency of the unit, and also makes its operation reliable and safe. Modern automation solves problems:

opening and closing fittings in the gas supply system;
the process of starting the unit in automatic mode;
installed or emergency shutdown of boiler equipment;
regulation of the flame level in the burner by means of a temperature sensor;
displaying air temperature indicators, heating agent heating level and other parameters on the screen.

Instructions for setting up a gas boiler:

connecting the thermostat to a temperature sensor fixed in the room, and setting the required values allow you to obtain a comfortable temperature regime for heating;
the installation of a thermostatic valve on the supply pipes in front of the heating radiators helps to change the cross-sectional area and easily carry out the process of regulating the temperature of the heat carrier;
the first start-up of the system at the limiting temperature allows the used coolant to freely enter the tank, which contributes to its maximum filling;
the efficiency increase is facilitated by the timely removal of scale and soot, as well as control of the lack of air in the system and the installation of a draft limiter;
regulation of pressure indicators is carried out using special valve regulators, and in order to increase the pressure, a circulation pump is installed;
the reduction of the boiler burner power is carried out automatically through the service menu, and the power regulation for increase is carried out by installing additional radiators or replacing the existing ones with the most powerful models;
many units are characterized by full performance at a pressure of 1.5 atm., and normally this value is 0.3 atm. lower than the indicators in the heating system;
a slight decrease in the pressure level in the unit is restored during a standard restart;
automatic selection of the operating mode of the gas boiler helps to maintain the desired temperature level even with a long absence of consumers in the room.

The process of switching on the boiler for the first time is accompanied by its short and energetic operation after the unit is fully connected to the heating system, due to which it is easy to check the correctness of the installation of the boiler equipment and the full functioning of the heating.

Common errors and malfunctions

Some of the most common malfunctions of Proterm gas boilers can be completely eliminated on your own, but the correction of the most difficult errors must be entrusted to the professionals of the service center.

Error / malfunction	Code / designation	Remedies
Reduced pressure level in the unit or heating system	F0	Check the function of the pressure sensor, make sure there are no cable damage and the integrity of the boiler control board
No flame in the burner	F1	Check the functionality of the emergency thermostat and the ignition transformer, make sure the gas supply and the integrity of the gas valve, restart
Rapid overheating of the gas boiler	F3	Eliminate clogging in the water filter and pump, check the performance of the heat exchanger, replace the anti-freeze mixture
Open in the temperature sensor circuit	F4	Check the resistance readings on the sensor, make sure that the cables connecting the control panel and the sensor are intact
Input signals are not recognized	F7	Make sure that the information panel is working, check the panel connectors
Opening the NTC sensor circuit and earthing the DHW boiler	F8	Ring the connections, disconnect and reconnect the elements or completely replace the sensor
The presence of a short circuit on the traction sensor	F15	Disassemble and clean the terminal connections, clean the tubes, if necessary, make a complete replacement of the assembly
Low pressure level inside the heating circuit	F22	Top up the heat carrier to the required level, make sure that the system is completely sealed and there is no leakage
Rapid rise in coolant temperature	F24	Replace insufficiently efficient pumping equipment and get rid of air in the system.
Unsuccessful initial ignition	F28	To eliminate the error / malfunction, it is necessary to involve the specialists of the service center
Activation of the anti-freeze protection of the fan	F33
Repeated sensor error for pressure	F75

Modern heating equipment from a manufacturer from Slovakia, which category includes single and double-circuit gas boilers Protherm, is distinguished by high reliability and model variety. These solid and inexpensive boilers of European quality from the "middle class" are deservedly popular and are invariably in demand by domestic consumers.

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 rooms, single-circuit gas boilers with a storage boiler for preparing hot water are more often used for heating. This system provides a more comfortable use of hot water in the home.

A two-circuit gas boiler Protherm Gepard 23 MTV is installed in the apartment of a new house with apartment heating. Next, we will consider the setting of 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 the Protherm Panther (Panther) boilers. This article describes in detail the adjustment, setting the power of the Protherm Gepard and Protherm Panther gas boilers.

It should be noted that the company that produces boilers of the Protherm series 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 settings of the service menu, gas boilers of the Vaillant brand are very similar to Protherm boilers.

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

The internal structure of a double-circuit gas boiler Protherm Gepard 23 MTV and Panther 25,30 KTV (Panther)

Reasons for the cycling (impulse operation) of the boiler in heating mode

The operating manual indicates that the net heat output of the Protherm Gepard 23 MTV boiler is regulated in the range from a maximum of 23.3 kw... to a minimum 8.5 kw... The factory setting for heating power is 15 kw.

The total area of the apartment, which is heated by the boiler, is 60 m 2... Heating devices (radiators) are installed to heat the apartment with a total maximum heat output of 4 kw.

How to determine the maximum heat output of a heating circuit in a house or apartment

How to determine the maximum heating output of a heating circuit? On the websites of radiator manufacturers and sellers, 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 the commissioning work. The boiler was started to work with the factory setting of the maximum output in heating mode 15 kw.

Obviously, a heating system with a maximum output of only 4 kw., will not be able to receive the heat energy produced by the boiler with a capacity of 15 kw... The boiler burner power is regulated within certain limits by the automatics. But the huge difference in the magnitude of the power of the boiler and heating devices leads to the fact that the automation of the boiler is not able to bring the power of the boiler in accordance with the needs of the heating system without additional settings.

The big difference between the power of a gas boiler and the power of heating devices, 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 of 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 if this boiler has to work with a heating system with a capacity of 4 kw... Please note that a double-circuit boiler operates in heating mode most of the time during the year, with a minimum power. At least 1/4 of the gas consumed for heating will literally fly out uselessly into the pipe. This will be a payback for installing too powerful equipment for heating and hot water supply 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 cyclicality, impulsiveness of work, or, as they say in the people, "clockwork of the boiler" manifests itself in the fact that the boiler burner after switching on quickly turns off when the set temperature is reached 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 heat energy per unit of time than a less powerful heating circuit is capable of accepting. Therefore, the temperature of the water leaving 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, the remaining cool water from the return pipe of the heating system and the burner turns on again. Then everything is repeated again.

A high-power heating system has an increased diameter of pipes and a volume of radiators, which means less hydraulic resistance. In large systems, water does not flow exactly the same, it flows faster, with a high flow rate (liters per second). During the rapid passage through the boiler heat exchanger, each liter of water only has time to heat up by 15-20 degrees o C... And in order to heat this liter to the specified 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 you heat slowly flowing water with the same power, then the water that gets into the heat exchanger immediately, at a time, will heat up by 40-60 degrees o C, immediately to the maximum temperature, and the boiler shuts down. And the water remaining in the system, which has not reached the boiler, will remain cold until the next cycle. This is 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 the electronics according to a complex algorithm, which takes into account both the time from the start of the burner, and the temperature value, and 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 regulation algorithm, but the 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 flow and return pipes should be no more than 20 o C.

Stroke reduces boiler life and increases gas consumption

Anyone, even without 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 in work occur. The increase in the number of starts as a result of cyclicity, most of all, eats up the service life of very expensive parts of the boiler - gas and three-way valves, a circulation pump, a fan of exhaust gases.

For ignition at the moment of start-up, the maximum amount of gas is supplied to the burner. Part of the gas, before the appearance of the flame, literally flies into the pipe. Continuous re-ignition of the burner further increases the gas consumption and reduces the boiler efficiency.

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

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

To eliminate the boiler cycle, it is necessary to equalize the capacities of the boiler and the heating circuit.

This can be done in two ways:

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

You can use both methods at once. Reduce the difference between the output 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 output.

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 thermal power reserve. As a result, in order to maintain the required temperature in the premises, in frost it is necessary to supply heating water to the radiators with a maximum temperature, more than 75 o C... At this temperature, organic dust particles decompose (burn) on the radiators and an unpleasant odor appears in the rooms. In addition, a high temperature of the coolant reduces the service life of plastic pipes and other plastic and rubber parts of the heating system.

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

Above - the standard temperature regime of the radiator in systems with plastic pipes. Below are the maximum radiator temperatures for comfortable soft warmth. 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. These are condensing boilers, solar collectors and heat pumps. They require that the system has a low temperature of heating water.

In the case of replacing radiators, it must be borne in mind that the expansion tank built into the boiler is designed for a volume of water in the heating system not exceeding 50 liters for the Gepard boiler, and 70 liters for the Panther. If the amount of water as a result of the installation of new radiators is greater, then an external expansion tank must be installed.

The external expansion vessel is connected to the return line of the heating system closer to the boiler. In this case, it is better to remove the built-in expansion tank from operation.

Buy radiators in your city

Heating radiators

How to adjust the burner power of a gas boiler

The useful heat output of the gas boiler can be reduced by reducing the gas supply to the burner. This is done by changing the settings of the gas valve.

Gas valve Honeywell boiler Protherm Gepard (Panther) - work diagram.
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 boilers "Protherm Gepard" and "Protherm Panther" basic settings Honeywell gas valve change 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 a Honeywell gas valve, installs the SIT 845 Sigma gas valve. The settings of the maximum and minimum burner power for this valve are made by turning the adjusting screws located on the valve body. For details on the adjustment of the SIT gas valve, see below, on page 2.

The electromechanical devices of the boiler (electrovalves, stepping and conventional electric motors, sensors) are controlled by the microprocessor of the electronic control board in accordance with the programmed program. The boiler operating program settings 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 Protherm Gepard boiler

The Protherm Gepard boiler is controlled from the control panel through the public user menu. How the owner controls the boiler is described in the operating manual.

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

Press and hold the mode (1) button for about 7 seconds; the display will change - a number will appear 0 ... - Using the 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 line of the menu in the form of characters alternating on the screen: d. 0.

- Using the buttons + or — d. **.

- Press the "mode" button to move from the designation of the menu line number " 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 return the display to its original state, press the "mode" button for 3 seconds. After 15 minutes of inactivity, the display returns to operating mode by itself.

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 the code is entered.

To access the service menu of the Protherm Panther boiler: Press and hold the mode (1) button for about 7 seconds; the display will change. - Through buttons on the left + or — (2), enter the access code to the service menu - 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 the numerical value of the line parameter in the right half of the display. - Through buttons on the left + or — (2), enter the number with the desired menu bar 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 return the display to its original state, press the "mode" button for 3 seconds. After 15 minutes of inactivity, the display returns to operating mode by itself.

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

Description of some commands of the service menu

Line d.00- maximum heating capacity (net 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-on 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 working in heating mode for anti-cycling, min... Protects against frequent switching on / off of the burner 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 stopping the burner at the set temperature or on the command of the room thermostat TA. It depends on the setting of the coolant temperature: - 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 changes proportionally in the range from 1 min. before set in d.02 parameter.

Dependence of the anti-cycling time on the setting of the parameter value in the line d.02 and heating temperatures

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 a command from the room thermostat. = 2 - permanently in winter: the pump runs as long as the boiler is in WINTER mode. Factory setting = 1.

Line d.19- the speed of the circulation pump; Operating mode options: = 0 - the burner is on; 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 shuts down (even if the temperature difference has decreased). The same cycle occurs on 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 hot water consumption measured by the flow sensor, l / min... when parsing hot water (read-only)

Line d.40- shows on the display the temperature of the water leaving the boiler, in the direct pipe of the heating system, o C... (only for reading)

Line d.41- shows on the display the temperature of the water at the boiler inlet, in the return pipe of the heating system, o 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! Range of values: 0 - 10. In the range: = 0 - 4 - ionization current is sufficient - flame is present; = 4 - 8 - ionization current just below a sufficient level - there is a possibility of flame loss; = 8 - 10 - the ionization current does not correspond to a sufficient level - there is no flame.

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

Line d.53- setting the maximum boiler burner power 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 lower 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 o 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. the temperature of the heating water and the temperature in the house are higher during the day, and lower at night. Can be configured the other way around.

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

Line d.70 - Adjusting 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 a particular circuit. Three-way valve position: = 0 - the valve is controlled based on standard requirements from the control system; = 1 - the three-way valve is set to the middle position for emptying the boiler (both heating and hot water supply); = 2 - the three-way valve is set to the heating water position.

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 possibility of changing the parameter leads to the elimination of the reaction to water hammer, which in some cases occurs in cold water pipelines. For example, when the automatic valve in the toilet cistern (or washing machine or dishwasher) is closed, a pressure surge (water hammer) may occur in the water supply pipes. The consequence of this may be a false operation of the flow sensor (turbine) of tap water, which will lead to a short-term unwanted activation of the DHW mode of the boiler. 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 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 that 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 shutdown relay was connected, this function cannot be used. 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. In case the setting leads to incorrect operation or malfunctions, it is possible to restore the factory settings of the boiler. Setting: = 0 - replacement with settings from production will not be performed; = 1 - a return to the factory settings will be made Note: when entering the setting of this parameter, the display always shows the parameter "0"

How to eliminate boiler cycle 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 value of the boiler output equal to the output of the heating devices connected to the boiler. This setting will only work in heating mode.

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

The maximum power of the heating system in the house may fall within the operating range of the boiler power 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 in the range of 8.5 - 23.3 kw.

In the service menu, as described above, we find the line d.0, press the "mode" button and look on the display the value of the boiler power parameter, kw... For example, the factory setting = 15 will be visible. Using the "-" button, set a new value for 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 heat losses at home, since the power of radiators, as a rule, is chosen with a certain margin.

Increasing the anti-cycling time

In the second step, 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 o C, the burner can be restarted after 4 - 5 minutes, not earlier.

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

An increase in the anti-cycling time leads to the fact that the burner is switched on later, at a lower temperature of heating water. The heat input from the boiler to the heating circuit is reduced.

Thus, selecting through the service menu the settings for the boiler power and the anti-cycling time, ensure that the cycle time between boiler burner starts is at least 15 minutes. That is, the boiler should be switched on within one hour no more than four times.

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 (performance) of the circulation pump is set manually by a switch on the pump. It is recommended to increase the pump speed to reduce the boiler stroke.

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

In the third stage setting is in progress minimum boiler power, by an amount lower than indicated in the instructions.

Such adjustment 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 with the "-" button we set a new value of the boiler power = 9 (the minimum possible setting corresponds to 8.5 kW.). The newly set value of the maximum boiler heating power (8.5 kw) is still very different from the power of heating devices (4 kw).

It should be noted that adjusting the boiler power according to the method described below is also useful in other cases, since it allows, through an experiment, to adjust the heating power of the boiler in accordance with the real power of the heating circuit. The real 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 the underfloor heating is set to the maximum permissible 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 coldest frosts, adding another +5 ° C... Usually it is at least 65 ° C... If the owners do not remember it, or on a new boiler in the menu, they set the factory setting for the maximum temperature 75 ° C... The boiler burner should automatically turn off at a temperature of 5 ° C more, i.e. at 80 ° C.
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 position parameter of the gas valve stepper motor in the factory mode of minimum power.

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

Press the "-" button to set the new value of the parameter 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 flame height in the burner. This indicates that the useful power of the boiler with the specified setting will greatly decrease.

Further, the temperature rise in the direct heating pipe at the outlet of the boiler is observed on the display. Usually, the temperature rise stops when it reaches some value less than the set one, for example 52 ° C... The boiler is running and the temperature does not rise (or changes very, very slowly). This means that a power balance has been achieved between the boiler and the heating system at this steady-state 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 to rise again and stops again, for example, at 63 ° C... Again, add the parameter value in line d.52 = 35 and so select the parameter until the temperature stops at a value slightly higher than the maximum, for example 77 ° C... In this way, a balance is achieved between the power of the boiler and the heating circuit at the maximum operating temperature. The boiler output will be set to the minimum required for operation with the connected heating circuit. In this case, the cycle of the boiler will be minimal.

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

If adjusting the bypass valve, the gas valve setting in line d.52 must be repeated.

In our example, the burner heated the water to a maximum temperature of 77 o C with the minimum parameter value in the 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 with a higher value, the burner heated the water to 80 ° C and the boiler automation turned off the combustion.

It should be noted that the above-described method for adjusting the gas valve, which allows, through the experiment, to balance the boiler power with the heating circuit power, is absent in the recommendations of the boiler manufacturer. This is the idea of the author of the article, which was successfully implemented when setting up autonomous heating systems with gas boilers.

Factory calibration of the gas valve

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

The boiler manufacturer prescribes 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 the minimum level specified in the instructions. Switch the boiler on in heating mode.

A pressure gauge 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 with buttons + and — string parameter value d.52, set the gas valve outlet to the minimum pressure specified in the boiler operation 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 water column.

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

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

Readers in the comments ask the question: "Isn't such a significant decrease in gas pressure on the burner dangerous for the boiler?" There are many different protections on boilers, but there is no protection against low gas pressure on the burner. Hence, 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 are equipped with appropriate protections.

A DIYer can roughly estimate whether the gas valve settings match the factory settings without having to measure the gas pressure at the valve.

For this, in line d.00 of the menu, set the parameter = 9 and turn on the boiler in the mode of minimum heating power. The readings of the gas meter are recorded. After 15 minutes (1/4 hour), the meter readings are again recorded and the gas flow rate is determined during this time. For example, the gas consumption was determined by the meter 0.289 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... The gas consumption according to the meter readings approximately corresponds to the factory standard. 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 rate is corrected by changing the parameter in line d.52.

Similarly, based on the gas consumption, it is possible to evaluate the setting of the gas valve at maximum power by switching the boiler to DHW mode.

Power 23.3 kW. corresponds to the maximum pressure at the valve outlet 85 mm water column

U-shaped pressure gauge

A simple pressure gauge for measuring on a gas valve can be made from a clear plastic tube by filling it with water and bending it into a U shape. One end of the tube is placed over the valve fitting and the other is left open. The ruler is used to measure the difference in water levels in the branches of the tube. The measured distance will be equal to the pressure in millimeters of water - mm water column.

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

After completing the measurements, do not forget to carefully tighten the screw on the measuring point and check its tightness.

How to install a protherm heating boiler. Gas boilers Proterm are reliable heating equipment. Maintenance by service center