When purchasing any heating equipment, the user receives instructions. It describes all the points that relate not only to the installation of the unit, but also to its operation. The Proterm Skat 9 kW boiler is no exception. Of course, for some reason the instructions were lost, then it will not be possible to start heating the house. After all, an electric boiler needs to be configured correctly. There are certain rules for the installation and operation of an electrical unit. They must be respected. Otherwise, the equipment will not work correctly.

The advantage of the electric boiler Proter Skat

The Proterm Skat unit has a number of advantages. Such heating equipment has become a good alternative to gas heating devices. The popularity of Proterm Skat boilers is increasing every year. After all, such units are ideal for heating houses that are not connected to the main gas pipeline. Electric boilers This modification is simply irreplaceable for country cottages with periodic or seasonal residence.

Among the advantages of such units, the following should be highlighted:

It is worth noting that Proterm Skat electric boilers have proven themselves to be economical and safe heating devices during their existence.

Installation Features

Proterm Skat 9 kW boilers are supplied with all necessary fasteners and elements. Besides The kit includes instructions that describe the process of connecting and setting up the unit step by step. It is worth noting that models that differ in power have exactly the same principles of installation, operation, and configuration.

Before installing Proterm Skat heating equipment, it is necessary to coordinate all work with electrical distribution services.

Proterm Skat electric boilers with a power of 9 kW can be connected to a conventional 220V electrical network. Installation of such heating equipment is carried out using a mounting strip. Such a unit has no certain restrictions on the choice of installation location. Of course, there are some requirements - you need free access for service, maintenance, adjustment and repair of heating equipment.

How to install

The Proterm Skat electric boiler is connected to the pipe system using pipes. The heating device is connected in such a way that the coolant can be easily drained in case of failures during operation without affecting the entire system. Additional valves allow you to fill the system with coolant and drain it. Also, in order to prevent freezing of water in houses with seasonal residence during cold periods, experts recommend removing the coolant completely from the system before temperatures drop.

The Proterm Skat boiler is connected to the electrical network through a power line supplied separately. The network cable is connected to the terminals, which are located in the lower corner of the case. All screws on the connectors must be carefully tightened. A boiler with a power of 9 kW can be connected to a single-phase network.

How to use the Proterm Skat boiler

The process of operating the Proterm Skat electric boiler does not cause any particular difficulties. After all, something like this heating equipment is equipped with systems for control and regulation. For the device to start working, you need to do just a few simple steps:

Connect the unit to the power supply.
Select the required temperature mode on the heating equipment control panel.
Adjust the power of the unit.
Perform more precise temperature settings.
If necessary, change the pressure level in the system.

After the completed manipulations, you must press the “Start” button. That's it, the Proterm Skat boiler is ready for use. During the first few days of operation, it is worth monitoring the operation of the unit and, if necessary, adjusting the temperature regime. This will identify some problems in the operation of the unit caused by the presence of air pockets in the system.

Starting the boiler

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

by Protherm specialist
specialized organization!

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

1. the boiler is connected to the electrical network and

in this case, the phase and zero are not mixed up.

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

boiler shutdown on the panel display
control, a message will appear indicating
malfunction (see “Messages about
errors“, page 8). Using a button
RESET (Fig. 1, item 6) unlock
boiler. If, after switching on, the protective
shutdown will occur again or is not possible
will unlock the boiler,
contact your 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 position (O).
When the boiler is turned off for a long time
period it is necessary to disconnect it from
electrical network and shut off the supply
gas to the boiler. If in winter the boiler
not used, then the heating system
needs to be emptied. However
Frequent draining should be avoided and
top-up of the heating system to avoid
formation of scale and deposits inside
boiler

Starting and shutting down the boiler

Boiler adjustment

Operating a boiler without room
regulator

according to the readings of the boiler sensor. IN
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

flow line on the control panel.

Operating a boiler with room temperature
thermostat

In this mode, the boiler supports
set temperature in the heating system
by room regulator. Jumper,
installed in the XT5 terminal block on clamps
5 and 6, removed. In its place is connected
room regulator. If indoors
with room regulator on radiators
thermostatic valves installed,
it is necessary to convert them completely
open position.
Warning: On the control panel

Meaning

Malfunction on-
outdoor sensor
temperature

The boiler operates without restrictions, but the temperature

The coolant is regulated by the boiler sensor (see.
“Setting the heating temperature”, page 5).

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

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

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

Gas equipment Proterm 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 practical and most convenient to use.

Wall type

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

"Panther". Inexpensive model with two heat exchangers and water heating. A modern heating device with the ability to operate in a closed system. It has reliable protection against freezing, automatic shutdown of gas supply and control of pump operation.

Inexpensive heating device option in the Protherm line

"Jaguar". A budget option equipment that does not have a winter/summer mode. Double-circuit unit with a closed combustion chamber and control via handles.

A simple model with the minimum required set of functions

"Cheetah". Double-circuit turbocharged boiler with a power of 11–23 kW and a closed combustion chamber. Even low-power models can heat 10–11 liters of water in one minute. A wall-mounted device in which the movement of the coolant is forced.

Turbocharged boiler with high efficiency

"Tiger". It features a neat appearance, an informative LCD display and a very simple controls. It is possible to program it for different operating modes or operate in automatic “comfort” mode. It is possible to automatically regulate the combustion process and 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 efficiency thermal output, economical fuel consumption, wide functionality and guaranteed durability.

"Bear". A 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.

The cast iron heat exchanger ensures long-term operation of the boiler

"Buffalo". Easy to use and durable boiler with high efficiency, capable of operating at different types fuel. Very powerful unit with a high degree of reliability.

Powerful equipment that can operate on different types of fuel

Main characteristics of the Bison model

Floor-standing boiler with a reliable heat exchanger

Main characteristics of the model

Stationary heating gas boiler

Main characteristics of the model Bear KLOM17

Construction of a Proterm gas boiler

Various modifications have individual characteristics of the device.

Manufacturing boilers using low-temperature cast iron helps to effectively minimize heat losses. A special feature of the design of heating devices of the Proterm brand is also an unusual, fairly environmentally friendly method of burning fuel.

The main components of gas heating equipment are presented:

ignition system;
burner;
heat exchanger.

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

Proterm boilers are used for heating and hot water supply

How to connect and configure

Basic conditions for installing a heating system gas equipment from the manufacturer "Proterm":

installation of the boiler and the necessary auxiliary equipment is carried out in accordance with the design 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 these purposes, and in case of special modification of the unit - exclusively in well-ventilated outbuildings;
the installation and commissioning process is carried out by specialists who have completed a training course in the installation and maintenance of gas equipment;
any boiler malfunctions are repaired by a service organization authorized by the manufacturer of heating and water heating equipment;
independent installation work entails deprivation of the consumer's warranty on the unit and its repair;
When unpacking heating equipment, the supplied boiler must be checked for completeness and compliance with the type of fuel used.

Before proceeding with installation, you must carefully read the attached instructions, and during the installation process, all recommendations given in the accompanying documents must be followed. Markings on equipment must not be damaged or removed.

Standard technology for connecting and setting up a gas boiler:

the unit is fixed to the wall using screws with appropriate spacers;
connection pipes should not be loaded with a pipe heating system, hot water supply system or gas supply elements;
the installation size of the tube connections, including their height and the required distance from inlet to outlet, must be strictly observed;
the hydraulic group is placed on the lower part of the gas equipment, and the system is necessarily equipped with a filler valve and safety relief valves;
when the maximum pressure inside the system is exceeded, steam or water is released from the safety valve;
connecting the unit to the heating system presupposes the ability to carry out the full scope of maintenance and repair work;
water is supplied to the heating system via a filling tap, and drain device used to reduce pressure or partially drain the coolant;
special outlets installed in designated areas of the heating system have full drain and fill functions;
the pressure of hot water supply to the equipment must exceed similar indicators in the heating system;
in the “Filling” tap position (hydraulic group), the operation of the system must be monitored using a boiler pressure gauge;
The valve opens counterclockwise and closes strictly clockwise.

Boiler equipment maintenance items covered by the warranty do not include activities such as deaeration and adjustment of the expansion tank.

Video: Connecting the Proterm boiler

Video: Setting up Protherm equipment

Brief operating instructions

Proper adjustment of Protherm gas boilers ensures optimal temperature conditions in rooms of different purposes and sizes. Among other things, the regulation of the automation of such equipment helps to increase the efficiency of the unit, and also makes its operation reliable and safe. Modern automation solves problems:

opening and closing valves in the gas supply system;
the process of starting the unit in automatic mode;
established or emergency shutdown of boiler equipment;
adjusting the flame level in the burner using a temperature sensor;
display on the screen of air temperature, coolant heating level and other parameters.

Instructions for setting up a gas boiler:

connecting a thermostat to a temperature sensor recorded in the room and setting the required values allows you to obtain a comfortable heating temperature;
installation of a thermostatic valve on supply pipes in front of heating radiators helps to change the cross-sectional area of the pipe and easily carry out the process of regulating the temperature of the coolant;
the first start of the system at the maximum temperature allows the coolant used to freely enter the tank, which contributes to its maximum filling;
Increased efficiency is facilitated by timely removal of scale and soot, as well as monitoring the lack of air in the system and installing 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;
reducing the power of the boiler burner is carried out automatically through the service menu, and increasing power is controlled by installing additional radiators or replacing existing ones with the most powerful models;
many units are characterized by full operation at a pressure of 1.5 atm., and normally this value is 0.3 atm. lower than the figures in heating system;
a slight decrease in the pressure level in the unit is restored during a standard restart;
automatic selection of the gas boiler operating mode helps maintain required level temperature even at long absence consumers indoors.

The process of turning on the boiler for the first time is accompanied by its short and vigorous operation after the unit is fully connected to the heating system, making it easy to check the correct 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 eliminated independently, but the correction of the most complex 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 functionality of the pressure sensor, make sure there are no cable damages and the integrity of the boiler control board
No flame in the burner	F1	Check the operation of the emergency thermostat and ignition transformer, make sure the gas supply and the integrity of the gas valve, restart
Rapid overheating of a gas boiler	F3	Eliminate blockages in the water filter and pump, check the functionality of the heat exchanger, replace the antifreeze mixture
Open circuit in the temperature sensor circuit	F4	Check the resistance readings on the sensor, make sure the integrity of the cables connecting the control panel and the sensor
Input signals are not recognized	F7	Make sure the information panel is working, check the panel connectors
Opening the NTC sensor circuit and grounding the DHW boiler	F8	Check connections, disconnect and reconnect elements, or completely replace the sensor
There is a short circuit on the traction sensor	F15	Disassemble and clean the terminal connections, clean the tubes, and, if necessary, completely replace the unit
Low pressure level inside the heating circuit	F22	Top up the coolant to the required level, make sure the system is completely sealed and there are no leaks
Rapid increase 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 specialists from the service center
Activating fan anti-freeze protection	F33
Pressure sensor error repeat	F75

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

__________________________________________________________________________

Installation, connection and startup of the Proterm Panther boiler

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

Fig.1. Mounted gas boiler 25 KTV PANTHER

1 – closed (sealed) combustion chamber (turbochamber); 2 - atmospheric 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 - traction sensor; 16 – fan; 17 – water pressure sensor

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

The temperature of the external surfaces of the boiler unit (side and top cover) during boiler operation should 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-resistant materials - at a distance of less than 100 mm from the surface;

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

It is necessary to leave a free space of at least 1 m in front of the boiler to carry out maintenance work.

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

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

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

The gas boiler Proterm Panther 25 KOV is designed to discharge combustion products into a chimney with natural draft. 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 into the pipe that restrict the passage of combustion products (for example, different kinds heat exchangers-heat recuperators, etc.).

Installation of gas boiler Proterm Panther

The Protherm Panther 25 KTV (KOV) boiler should be installed in closed heating systems with water as the coolant. The nominal diameter of the system pipes is selected based on the characteristics of the pump. The piping is designed according to the required capacity of a given system, and not the maximum
boiler heating capacity.

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

Air vents are located at the very high place 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 boiler expansion tank is designed for a heating system capacity of 95 liters. In larger systems, another one should be installed expansion tank membrane type. Heating radiators can be equipped with thermostatic valves.

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

DHW system

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

The connecting pipes have external threads. They must not be loaded with the weight of pipes from the heating system, hot water supply system or gas supply. It is necessary to strictly observe the installation dimensions of the connecting pipes (height, distance from the wall and between individual inlets and outlets).

At the bottom of the boiler there is a hydraulic group, which is equipped with a safety relief valve, a system filling (priming) valve and drain tap. 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 escape.

It is recommended to connect the boiler to the heating system in such a way that during its repair it is possible to drain water only from the unit. The heating system can be replenished (in small quantities) using a refill tap.

The drain valve is designed to reduce the water pressure in the boiler during possible repairs. This tap can only partially drain the water from the boiler. Complete drainage of water or the entire heating system, as well as refilling, must be carried out using fill and drain valves (plugs) installed in
certain areas of the heating system.

Filling the Protherm Panther boiler and the 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 valve in the hydraulic group and at the same time monitor the pressure increase on the boiler pressure gauge. The tap opens by turning it counterclockwise, and turning it clockwise closes it.

When the required pressure is reached, the filling tap must be carefully closed and checked to see if the water pressure increases (the tap 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 setting check valve on the water supply pipe to the boiler.

During repairs, unfavorable building layouts, etc., you can connect the boiler to the heating system, hot water supply 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, and exposure to aggressive substances. At the end of their service life, the hoses must be replaced with new ones. To connect the boiler to a pipeline made of copper pipes, you can use a special connecting set of shaped copper pipes with fittings.

Tube sizes:

OB 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 of distribution network 1.8 kPa, and calorific value 35900 kJ/m3. The diameter of the pipes, fittings and gas meter must be selected taking into account other gas appliances of the consumer. It is necessary to connect a pipe to the boiler with a minimum connecting diameter of 1/2“, but it is better with a nominal diameter of 3/4“.

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

Due to the fact that the operation of a boiler using cylinders is problematic, first of all, 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 a heated facility and its filling by an authorized organization are provided.

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. Using a gas pressure reducing valve, it is necessary to ensure a nominal gas pressure in front of the boiler of 3.0 kPa.

Air supply and combustion products exhaust

Is air supplied and combustion products removed through an external coaxial pipeline? 100 mm. Equivalent pipeline length (numerically equal to the sum linear meters straight pipe and the number of elbows 90°) should be no more than 9 m. For an equivalent pipeline length of more than 3 m, the throttle washer 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. In vertical sections, condensate drainage devices are used.

The pipeline outlet should 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, constantly open ventilation grilles and doors;

Above the top border of windows, bars or doors;

In the area under awnings, balconies and roof edges.

Minimum distance between two adjacent pipeline outlets:

Horizontal – 1 m;
- vertically – 2 m.

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

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

2 m, if there are no windows or grilles 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 building facade, 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 boundary of the window (grid) or door to the axis of the pipeline. In the space under the canopy (balcony), the head of the pipe must be at a distance of at least the radius of the circle.

When pipelines exit vertically onto the roof, their heads must 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 located in an explosive area, internal parts buildings or structures, tunnels or underground passages, in closed spaces.

The hole in the wall for the passage of the 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 (foam, gypsum, plaster).

Electrical connection of the gas boiler Proterm Panther

The Proterm Panther boiler must be connected to the electrical network through a plug 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 (1 m).

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

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

To control the boiler from a room regulator, use a regulator with a potential-free output (other than the mains voltage, no other voltage is allowed to be supplied to the boiler). Connect the room regulator to the unit with a flexible two-core cable with a cross-section of 0.5 to 1.5 mm2. Exit the cable from the boiler through a plastic cable sleeve.

The terminal block for connecting the room regulator and 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 of the regulator output contacts is 24 V / 0.1A.

The outside temperature sensor should be connected with a two-core copper conductor with a cross-section of 0.75 mm2. The wiring resistance should be no more than 10 Ohms, maximum length - 30 m.

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

Work on putting the Protherm Panther boiler into operation:

Remove the screw securing the lid at the bottom of the boiler;

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

Make sure the gas supply is turned off.

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 and 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. After this, the display 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 release the air from all heating devices (the flow of water should be continuous, without air bubbles).

Leave the cap on the air separator loose while the boiler is operating.

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

Make sure that the pressure shown on the display is in the range of 1.2 - 2 Bar, top up if necessary.

Starting the Proterm Panther boiler

Before starting the boiler, check:

The main gas supply valve is open,
- the gas valve at the inlet is open,
- closing valves (water, heating) at the outlet are open,
- the unit is connected to the electrical network.

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 switch off the equithermal control (E-).

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

Smoothly raise the temperature in the heating system to maximum (all radiators should have open valves). The air in the water of the heating system is gradually removed through an automatic air separator. There should 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;

Turn on the boiler again and heat the system to maximum temperature;

Turn off the boiler, remove air if necessary and refill 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 tank relative to the system.

Protective functions of the Proterm Panther boiler

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 device will ignite and operate until the temperature rises by 25 °C. If it freezes (exhaust temperature below 3 °C), the boiler start-up is blocked.

The pump switches on automatically for a short time if it has not been switched on for 24 hours. This ensures protection against blocking due to deposits during prolonged shutdown. The pump operates continuously when the temperature rises above 85°C (overheat 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 increases, operation automatically resumes.

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

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.

Adjusting the Protherm Panther boiler

When the boiler operates 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 E- symbol;

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

– select the Exhaust temperature mode and configure it;

– the room regulator must be turned off, and a jumper must be installed between the terminals to connect it.

When the Proterm Panther boiler operates with a room regulator, it maintains the temperature set on the display. In this case, the unit turns off according to commands room thermostat installed inside the control room. There should be no thermostatic valve on the radiator in this room.

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 outside air temperature.

An outside air temperature sensor must be connected to the boiler. The sensor is installed on the coldest wall of the building (north or north-west) 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 be exposed to direct sunlight.

Inlet gas pressure control:

Turn off the boiler.

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

Connect the appropriate pressure meter;

Carry out a launch;

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

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

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 storage boiler for cooking hot water. This system provides more comfortable use hot water in the house.

In an apartment in a new building with apartment heating A Protherm Gepard 23 MTV double-circuit gas boiler was installed. Next, let's look at setting the boiler power using this apartment as an example.

Gas boilers of the Protherm Gepard series are almost a complete analogue (a simpler version) of the Protherm Panther boilers. This article describes in detail the adjustment and power settings 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 famous Vaillant brand. Vaillant gas boilers are in a higher price category due to the use of more quality materials for the manufacture of heat exchangers. But in design, other parts used, and service menu settings, Vaillant brand gas boilers are very similar to Protherm boilers.

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

Internal structure of the double-circuit gas boiler Protherm Gepard 23 MTV and Panther 25.30 KTV (Panther)

Reasons for clocking (pulse operation) of the boiler in heating mode

The operating manual states that the useful thermal power of the Protherm Gepard 23 MTV boiler is regulated within the range from a maximum of 23.3 kW. to minimum 8.5 kW. The factory setting for power in heating mode 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 thermal power of 4 are installed kW.

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

How to determine the maximum thermal power heating circuit? On the websites of radiator manufacturers and sellers we find the thermal power of each radiator installed in the house. In manufacturers' catalogs, 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 according to the “75-65/20” parameter. The sum of the powers of all radiators connected to the boiler will be equal to the maximum thermal power 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 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 what is produced by the boiler thermal energy power 15 kW. The power of the boiler burner is controlled automatically 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.

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

By the way, about other disadvantages of an overly powerful boiler. The service instructions for the Protherm Gepard 23 MTV boiler indicate its efficiency in heating mode: 93.2% at maximum thermal power (23.3 kW.) and 79.4% when operating at minimum power (8.5 kW.) Imagine how the efficiency will further decrease if this boiler has to work with a heating system with a power of 4 kW. Please note that a double-circuit boiler throughout the year most time works in heating mode, with minimum power. At least 1/4 of the gas spent on heating will literally fly uselessly down the chimney. This will be the price to pay for installing overly powerful heating and hot water equipment 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 people say, “clocking the boiler” manifests itself in the fact that the boiler burner, after being turned on, quickly turns off when the set temperature is reached in the straight pipe at the outlet of the boiler. But the radiators remain not heated 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 time than a less powerful heating circuit is capable of receiving. Therefore, the temperature of the water leaving the boiler rises quickly and it turns off earlier, without having time to heat the radiators.

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

Heating system high power has an increased pipe diameter and radiator volume, which means less hydraulic resistance. In larger systems, water does not flow exactly the same, it flows faster, at a higher flow rate (liters per second). During the rapid passage through the boiler heat exchanger, each liter of water only manages to heat up by 15-20 degrees o 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.

For heating systems low power the pipes are thinner, the radiators are smaller, the hydraulic resistance is higher and the water flows slower. If you heat slowly flowing water with the same power, then the water entering the heat exchanger immediately, at one time, will heat up by 40-60 degrees o 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 clock 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 electronically using a complex algorithm, which takes into account the time from the start of the burner, the temperature value, the rate of temperature change in the heating circuit, and the temperature difference in the forward and return pipes. I don’t know all the intricacies of the control algorithm, but the automation, without additional service settings, does not ensure normal operation of the boiler at a power below the minimum specified in the technical specifications.

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

Clocking reduces the service life of the boiler and increases gas consumption

Any person, even without being a mechanic or electrician, knows that the most difficult operating mode for equipment is the moment of startup, turning on mechanical and electrical equipment. During the start-up period, the greatest wear is observed, and failures most often occur. An 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, circulation pump, exhaust gas fan.

For ignition at the moment of starting, the burner is supplied maximum amount gas Part of the gas, before the flame appears, literally flies into the pipe. Constantly “re-igniting” the burner further increases gas consumption and reduces the efficiency of the boiler.

Some cyclical operation of a gas boiler is provided for by its normal operating mode. For example, regulating the temperature in a room without a thermostat or using a two-position thermostat occurs by periodically turning the boiler burner on and off.

The task of regulating boiler power is to eliminate excessive cycling - clocking caused by a 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:

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

You can use both methods at once. Reduce the difference between the power 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 reserve of thermal power. As a result, in order to maintain the required temperature in the premises, in frosty conditions it is necessary to supply heating water to the radiators at a maximum temperature of more than 75 o C. At this temperature, decomposition (combustion) of organic dust particles occurs on the radiators and appears in the rooms. bad smell. Besides, heat coolant reduces the service life of 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 conditions even at the maximum heating water temperature. Before adjusting the boiler power, I recommend determining the need, and, if necessary, increasing the power of the radiators by 30 - 100%, at least in the coldest rooms.

Above - standard temperature conditions for radiator operation in systems with plastic pipes. Below are the maximum radiator temperatures for comfortable, soft heat. To switch from standard mode to soft heat, the power (size) of the radiator must be increased by approximately 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 that the heating water temperature in the system be low.

When replacing radiators, it is necessary to take into account that the expansion tank built into the boiler is designed for a volume of water in the heating system of no more than 50 liters for a Gepard boiler, and 70 liters for a Panther. If the amount of water as a result of installing new radiators turns out to be greater, then it is necessary to install an external expansion tank.

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

Buy radiators in your city

Heating radiators

How to regulate the burner power of a gas boiler

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

Honeywell gas valve for Protherm Gepard (Panther) boiler - operating diagram.
EVS1— safety electric valve; EVS2— electric drive of the control valve; Vm— a stepper motor controls gas flow through a control valve.

In modern boilers “Protherm Gepard” and “Protherm Panther” the main settings gas valve from Honeywell changed using 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 gas valve SIT 845 Sigma. The maximum and minimum burner power settings for this valve are made by rotating the adjusting screws located on the valve body. Read about the features of adjusting the SIT gas valve below, on page 2.

The electromechanical devices of the boiler (electric valves, stepper and conventional electric motors, sensors) are controlled by a 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 a publicly accessible user menu. How the owner can operate the boiler is described in the operating 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 entering the code by pressing the mode button (1). After this, the display will show the first line of the menu in the form of symbols alternating on the screen: d. 0.

— Using buttons + or — d.**.

- Press the "mode" button to move from the menu bar number designation " d.**» to the parameter value (the “=” symbol and the parameter value are alternately displayed on the display). — 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 on its own.

Access to the service menu of the Protherm Panther boiler (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 accessible when the code is entered.

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

After this, 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 numeric value of the line parameter in the right half of the display. - By using buttons on the left + or — (2), enter the number with the required menu bar number: d.**.

To change the value of an option 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 on its own.

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 service menu commands

Line d.00— maximum heat output ( useful power) 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., select a value between 2 and 60 min. Factory setting =5

Line d.02— Time delay after operation in heating mode for anti-cycling, min. Protects against frequent switching on and 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 anti-cycling time) prevents a rapid restart in heating mode after the burner has stopped due to the set temperature or the room thermostat TA. It depends on the coolant temperature setting: - at 80 °C, it is set to 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. up to set in d.02 parameter.

Dependence of anti-cycling time on the parameter value setting 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 operates together with the burner. =1 - continuous; with RT thermostat: the pump is activated by the command of the room thermostat. =2 - constantly in winter: the pump runs all the time while the boiler is in WINTER mode. Factory setting =1.

Line d.19— speed of the circulation pump; Operating mode options: =0 - burner is running; speed in heating mode is selected automatically, maximum - in DHW mode, minimum - if the burner is turned 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 hot water 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 switches 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 hot water consumption 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 leaving the boiler in the direct pipeline of the heating system, o 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 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 is slightly below a sufficient level – there is a possibility of flame loss; =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. The lower the parameter value, 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 lower the parameter value, 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 amount set in d.62. Those. During the day, the temperature of the heating water and the temperature in the house are higher, and at night lower. You can set it the other way around.

Line d.67 — Displays the time between boiler starts. This parameter displays the cooling time in minutes before the boiler is turned on again. The countdown of minutes begins at the moment the boiler turns off due to exceeding the maximum set 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 switch-on is calculated based on the set boiler heating water temperature 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 heating requirements for a particular circuit. Three-way valve position: =0 - valve is controlled based on standard requirements from the control system; =1 - three-way valve is set to the middle position to empty the boiler (both heating and domestic hot water); =2 - the three-way valve is set to the heating position of the extract air.

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

Line d.88 — Water hammer protection in the wiring cold water(for KTV and KOV boilers). The ability to change the parameter eliminates the reaction to water hammer, which in some cases occurs in cold water pipelines. For example, at the moment of closing an automatic valve in cistern toilet (or washing machine, or dishwasher) a pressure surge (water hammer) may occur in the water supply pipes. The consequence of this may be false alarm flow sensor (turbine) of tap water, which will lead to short-term unwanted activation of the boiler 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 value =1 - activation of the ignition process for heating tap water at a flow rate of 3.7 l/min. In this case, the flow duration should be at least 2 seconds.

Line d.90 — Identification of the connected room sensor. By using this parameter It is possible to verify that the room regulator is connected correctly, or that the connection between the room regulator and the boiler is working properly. Please note: this description only applies to controllers that support eBus communication. If a conventional regulator with a switching 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. If the settings lead to incorrect operation or failures, it is possible to restore the boiler to factory settings. Setting: =0 - replacement with factory settings will not be performed; =1 - a return to factory settings will be made Note: when entering the setting of this parameter, the display always shows parameter “0”

How to eliminate boiler clocking in heating mode

Adjusting the maximum heating power of a 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 value of the boiler power parameter on the display, 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 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 boiler power

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, find line d.0, press the “mode” button and look at the value of the boiler power parameter on the display, kW. For example, the factory setting =15 will be visible. Using the “-” button we set the new boiler power value = 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 is usually chosen with some reserve.

Increasing the anticycling time

At the second stage, increase the anticycling 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 specified on the display, 70 o C, restarting the burner is possible after 4 - 5 minutes, not earlier.

In line d.02 we set a new value for the anticycling time, for our example the maximum possible = 60 minutes. Line d.67 displays the time in minutes until the boiler is turned on again. Breaks in burner operation became approximately 10 minutes long. Twice as much as with the factory setting, which is still too often.

Increasing the anti-cycling time results in the burner turning on later, at a lower heating water temperature. The heat flow from the boiler to the heating circuit is reduced.

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

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

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

Setting up a Gepard or Panther gas boiler for power below the minimum

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

Such adjustment is not necessary in all cases, but only when the first and second stages do not bring the required result. As in our case, when at the first stage we use the “-” button to set a new boiler power value = 9 (the minimum possible setting corresponds to 8.5 kW.). The newly set 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 using 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 actual power of the heating circuit. The actual power is usually less than the calculated one.

Before carrying out work for setting the minimum burner power, necessary:

Fully open thermostatic and other valves on radiators, and room thermostat set to maximum temperature. Thermostat, control warm floors, set to the maximum permissible temperature so as not to overheat the floors.
In the custom menu of the boiler, set the maximum operating temperature, which is set by the owners in the coldest weather, adding another +5 °C. Usually it is not less than 65 °C. If the owners do not remember it, or on the new boiler in the menu they set the factory setting for the maximum temperature of 75 °C. The boiler burner will have to switch off automatically 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 gas valve stepper motor position parameter in the factory minimum power mode.

By removing the front cover of the boiler, we visually observe the size of the flame in the burner. In our example, the factory setting was displayed on the display, the number = 72, and the flame height in the burner was quite high.

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 flame height in the burner. This indicates that the useful power of the boiler with the specified setting will be greatly reduced.

Next, observe on the display the increase in temperature in the direct heating pipeline at the outlet of the boiler. Typically, the temperature increase stops when it reaches some value less than the set value, for example 52 °C. The boiler is running, but the temperature does not increase (or changes very, very slowly). This means that a power balance has been achieved between the boiler and the heating system at this established water temperature. At this moment, we increase the parameter in line d.52 of the service menu, set a new value = 30 - the temperature begins to rise again and stops again, for example at 63 °C. Again we 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 maximum operating temperature. The boiler power will be set to the minimum level required to operate with the connected heating circuit. In this case, the cyclic operation of the boiler will be minimal.

If the radiators do not warm up well in height, the temperature difference in the forward and return pipes at a maximum temperature is more than 15-20°, then increase the response pressure of the bypass valve. Read below on how to adjust the bypass valve. The water temperature 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 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 at the minimum value of the parameter in the line d.52, equal to =28 (factory setting was =72). With a lower parameter value, the burner could not heat the water to the specified temperature. And at a higher value, the burner heated the water to 80 o C and the boiler automatic switched off the combustion.

It should be noted that the method described above for adjusting the gas valve, which allows you to balance the boiler power with the power of the heating circuit through an experiment, is not included in the recommendations of the boiler manufacturer. This is the idea of the author of the article, successfully implemented during setup autonomous systems heating with gas boilers.

Factory calibrated gas valve

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

The boiler manufacturer specifies 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 power to the minimum level specified in the instructions. Turn on the boiler in heating mode.

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

Call line 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 operating manual. For example, for a Gepard 23 MTV boiler, the minimum pressure in front of the burner is 1.5 mbar or 15.5 mm.water.st..

This setting will ensure the boiler operates with the minimum power specified by the manufacturer - 8.5 kW. The boiler manufacturer's service instructions do not answer the obvious question of what to do if the power of the heating circuit connected to the boiler is less.

In our example, after setting up and installing in the line d.52 parameter =28, measuring 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?” Boilers have many different protections, but there is no protection against low pressure gas on the burner. 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, since the boilers have appropriate protection.

A home mechanic can roughly assess whether the gas valve settings correspond to the factory settings without resorting to measuring the gas pressure on the valve.

To do this, set parameter =9 in line d.00 of the menu and turn on the boiler in the minimum heating power mode. Record gas meter readings. After 15 minutes (1/4 hour), the meter readings are recorded again and the gas consumption during this time is determined. For example, we determined the gas consumption from the meter to be 0.289 m 3 /15 min. Multiply this value by 4 and get gas consumption per 1 hour in minimum power mode 1.156 m 3 /hour. Compare the obtained value with the data from the factory instructions. For example, the standard gas consumption in 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 setting the gas valve in minimum power mode meets the requirements of the factory instructions. If not, then the gas consumption is adjusted by changing the parameter in line d.52.

Similarly, based on gas consumption, you can 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 a gas valve can be made from a clear plastic tube, filled with water and bent into a U shape. One end of the tube is placed over the valve fitting and the other is left open. A 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 column - mm.water.st..

A tube with an internal 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.

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

Proterm heating boiler instructions. Electric boilers Proterm Skat: design features. Technical characteristics and appearance