Protherm gepard 23 mov service manual. Setting, adjusting the power of a gas boiler. Setting the Gepard or Panther gas boiler to power below the minimum

Description of Protherm Cheetah

Wall-mounted gas double-circuit boilers with a capacity of 11 kW for heating and hot water preparation in a steel plate heat exchanger.
Are intended for installation in apartments, houses and country houses. Boilers are heating appliances of increased comfort, they are easy to use and maintain.
Using the liquid crystal display, you can continuously receive information at any time during the operation of the boiler. The display allows you to constantly monitor the entire process.
Boiler models Protherm Cheetah 11 MOV and 23 MTV are equipped with a coaxial flue gas system and do not require connection to a chimney, which allows them to be installed in rooms where there is no stationary chimney or its installation is very difficult or impossible due to various reasons.

Technical description
✓ Double-circuit gas boiler
✓ Open (MOV model) / closed combustion chamber (MTV model)
✓ Power 11.0 kW
✓ Efficiency 90.3% (MOV models) / 93.2 (MTV models)
✓ Automatic burner flame modulation
✓ Independent regulation of thermal loads of the circuits of the heating system and hot water supply
✓ Steel plate DHW heat exchanger
✓ Hot water preparation 11.0 l/min. (at ∆t=30 °C)
✓ Boiler control with built-in microprocessor
✓ Automatic diagnostics of boiler operation
✓ Liquid crystal display which displays the temperature and pressure of the coolant in the heating system, indication of malfunctions, as well as an indication of the need for preventive maintenance of equipment
✓ Control mode "WINTER-SUMMER"
✓ Control mode "COMFORT"
✓ Ability to work with weather-dependent automation
✓ Flame detection
✓ Frost protection
✓ overheat protection
✓ Circulation pump anti-blocking system
✓ Chimney draft control
✓ Built-in make-up valve for filling the heating system
✓ Built-in circulation pump with automatic air vent
✓ Possibility of work on the main and liquefied gas
✓ Warranty 2 years

Designations of wall-mounted gas boilers PROTHERM Cheetah:
11 - boiler power.
MOV– open combustion chamber, hot water heating in flow mode.
MTV– closed combustion chamber, hot water heating in flow mode.

The Protherm Cheetah 23 MTV boiler is designed for heating individual houses, cottages, country houses, summer cottages up to 200-230 sq.m. + for the organization of hot water supply. This boiler has separate heat exchangers, which is a great advantage where the water is hard. By default, the boiler runs on natural main gas, but if necessary, the boiler can be converted to work on liquefied gas, for this you need to purchase a set of jets.

A closed combustion chamber (in other words, such boilers are called turbocharged) implies the presence of a fan in this boiler, which forcibly takes in air and removes combustion products to the street. For such boilers, coaxial chimneys are usually used - "pipe in pipe".

The wall-mounted gas boiler Protherm Cheetah 23 MTV is made on the basis of improved and therefore more durable components. The manufacturer improved the hydraulic group and installed an Italian-made SIT gas valve. The boiler turned out to be reliable, economical and inexpensive - the perfect balance of advantages for home heating. Key features of this model:

• Separate heat exchangers;
• High performance hot water supply;
• Closed combustion chamber;
• Hydroblock made of composite materials;
• Electronic flame modulation.

The boiler will be an ideal choice for heating small country houses, private houses and apartments with individual heating.

The wall-mounted gas boiler Protherm Cheetah 23 MTV is made according to a double-circuit scheme with separate heat exchangers. The primary heat exchanger is made of copper - it is responsible for heating the coolant in the heating circuit. The plate secondary heat exchanger is made of stainless steel - it is responsible for the preparation of hot water in the DHW circuit. Its productivity is up to 11.4 l / min. Thermal power is 24 kW, which corresponds to 240 square meters. m. heated rooms. The boiler was endowed with an electronic flame modulation system, thanks to which it can withstand the temperature in both circuits with an accuracy of up to a degree - consumers are waiting for the stable operation of the heating system and hot water in the taps at any flow rate.

The boiler is designed for wall mounting. Thanks to its shallow depth of 310 mm, it is able to fit into any interior without disturbing it. This is also facilitated by the elegant and strict design of the boiler. Combustion products are removed through a coaxial chimney right behind the wall - a classic chimney is not needed here, just as the costs of arranging it in private households are not needed. The maximum gas consumption is 2.9 cubic meters. m/hour. It is also possible to work on liquefied gas with a maximum flow rate of 2.1 kg/h. The noise level during operation is minimal. The presence of a built-in piping will be an undoubted advantage - an expansion tank, a silent circulation pump with blocking protection and a safety group are already present inside the boiler.

The gas boiler Protherm Cheetah 23 MTV is a model of reliability and safety. It is resistant to corrosion, starts easily at low air temperatures, is equipped with numerous security systems - they control the presence of a flame, monitor temperature and pressure, and protect the heating circuit from freezing. If necessary, the boiler can be used as an energy source for underfloor heating.

Protherm Cheetah 23 MTV is a time-tested and real experience gas boiler from a well-known brand. You can buy it in the Teplodvor online store at really competitive prices. Profitable promotions have been prepared for buyers, delivery in Moscow and Russia, pickup from the warehouse.

All are produced at the factory of the same name in Slovakia.

Options for organizing smoke removal:

1. Horizontal coaxial chimney
2. Separate smoke exhaust system
3. Vertical coaxial chimney

Using the liquid crystal display, you can continuously receive information at any time during the operation of the boiler. The display allows you to constantly monitor the entire process.

Model 23 MTV is equipped with a coaxial flue gas system and does not require connection to a chimney, which allows them to be installed in rooms where there is no stationary chimney or its installation is very difficult or impossible due to various reasons.

Switching to DHW mode occurs automatically when the hot water tap is opened. The main feature of the boiler is the rapid heating of water, about 2 seconds.

The new boiler has a new display compared to the previous model. Bright backlight allows you to see the data on the screen now in a bright room during daylight hours.

The reliability and durability of the boiler is provided by a hydraulic block made of durable composite material, improved compared to the hydraulic block in the previous generation model. Copper heat exchanger and burner made of chrome nickel steel, plate secondary heat exchanger made of stainless steel once again emphasize the quality of the boiler

The new SIT pneumatic gas valve is quieter than the previous generation gas valve.

Wall mounted gas boiler Proterm Cheetah, reviews of the owners to which help all potential buyers better decide on the choice of a hinged gas appliance, firmly occupies a high place in the ratings of heating equipment.

The modern design and quality of materials, compact dimensions and the maximum set of all necessary functions have made the Gepard model a kind of flagship in the line of hinged double-circuit gas boilers from the Slovak company "".

I propose to analyze in more detail the device and the differences between models, technical characteristics and prices for gas boilers Protherm Gepard 23 MTV and MOV, the instruction manual for which will help us to review the devices of the Slovak manufacturer.

Features of wall-mounted double-circuit gas boilers Protherm Gepard MTV and MOV

Like any European manufacturer of mounted gas boilers, the Proterm company produces several models in the Gepard line. Let's figure out how they differ and what makes them special.

Gas boilers Proterm Gepard

All Gepard boilers have two circuits and two heat exchangers for each of these circuits: the main copper for heating, and the secondary for hot water, made of stainless steel. An important distinguishing feature of the boilers of this series is the rapid heating of running water (no more than 2 seconds) in the secondary plate heat exchanger.

Double-circuit gas boilers "Gepard" are produced only in Slovakia and only in two versions:

- with a closed combustion chamber Gepard MTV;
- with an open chamber (atmospheric) Gepard MOV.

Until 2015, the devices of this series had a small display, and the power of the produced boilers was 11 and 23 kW. Since 2015, the company has upgraded the wall-mounted boilers of the Gepard series, replacing the digital display with a brighter and more informative one, installing a new hydraulic group made of higher quality composite materials and an improved SIT gas valve.

In addition, the power of the new boilers has become 12 and 23 kW. For example, the Protherm Gepard 23 MTV gas boiler is a double-circuit gas boiler with a closed combustion chamber (with a turbine) with a power of 23-24 kW, and the Protherm Gepard 12 MOV boiler is a double-circuit gas boiler with an open combustion chamber (natural draft) with a power of 12 kW.

Gas boiler Prothem Gepard 23 MTV: instructions and device

This unit with two heat exchangers includes a reliable two-speed circulation pump Grundfos, pneumatic gas valve SIT, the gas burner of the boiler is made of chromium-nickel steel, a membrane expander tank of 5 liters.

We look at the photo diagram of the device and the connection of the gas mounted boiler "Protherm Gepard 23 MTV".

Protherm Gepard 23 MTV

1 - expansion tank with a membrane;
2 - water pressure sensor;
3 - hydraulic group of the boiler;
4 - electric unit with an electric board;
5 - burner ignition electrode;
6 - control electrode;
7 - gas burner of the boiler;
8 - main heat exchanger;
9 - turbine (fan).

Double-circuit mounted heating boilers Protherm Gepard 12 and 23 MTV with a closed combustion chamber and forced draft can be used either with a coaxial pipe 60/100 mm "pipe in pipe" through the wall, or with a system of separate pipes through a chimney channel separator - adapter 80/80 mm.

The modern LCD information display reflects the temperature set by the user in the heating and DHW circuits. In addition, it shows various error codes in case of malfunctions or breakdowns of the device. It is possible to turn on the Eco mode on the control panel, in which the temperature will not exceed 50 degrees, as well as the "warm floor" mode.

A room thermostat for setting the operating mode of the unit depending on the air temperature in the house is not included in the “wall-mounted” package, but is an option that can be purchased and connected separately.

The circulation pump has an automatic air vent and a post-circulation function to protect the pump from jamming. The hydraulic group of the boiler "Gepard 2015" is made of higher quality materials than the devices of the previous series. Let's look at it in detail.

Hydraulic group of the boiler Proterm Gepard

1 - safety valve for 3 atmospheres;
2 - pressure sensor in the system;
3 - plate secondary heat exchanger for hot water from stainless steel;
4 - automatic air vent;
5 - circulation pump;
6 - gas valve SIT;
7 - three-way valve.

Gepard gas boilers are equipped with electric ignition, a gas burner with its smooth modulation and a three-way valve that automatically regulates the heating of water in the unit, depending on its operating circuit. Installed temperature sensors NTS, draft sensor, as well as protection against overheating and freezing of the heating system.

Protherm Gepard MTV gas boilers: specifications, gas consumption, dimensions

Gas boilers Proterm Gepard have a fairly compact size: 740/310/410 mm. Connection of the DHW circuit with threaded fittings with a diameter of 1/2', and the heating and gas circuit - 3/4'. Productivity of flowing hot water is 11,4 l/min.

Atmospheric boilers with an open combustion chamber "Gepard 12 and 23 MOV" with a chimney diameter of 130 mm. The consumption of natural gas for models with a maximum power of 23 kW is 2.9 m3 / h, and liquefied gas - 2.1 kg / h.

Gas boilers Protherm Gepard: specifications

Advantages of Protherm Gepard gas boilers:

- European assembly;
— high quality components;
— modern set of functions;
— informative display with antiglare;
— a network of service centers.

Disadvantages of gas boilers Proterm Gepard:

— hydraulic group made of plastic;
— a small volume of the expansion tank;
- high price from 40,000 rubles;
- the two-year warranty is valid only if the boiler is installed by specialists with certificates from Protherm.

gas boilers Protherm Gepard 23 MTV and MOV, reviews are more often positive, both from owners and from specialists. Today we have analyzed in detail the technical characteristics and features of the Gepard 23 MTV boiler device, using the operating instructions and information from the company's official website. The device has many advantages and some disadvantages, which we also focused on. Let's watch the video.

With the onset of winter, you want more comfort and warmth in your home. But property owners are also pleased with a modest electricity bill. If you install a gas boiler in your home, you can enjoy its power and energy efficiency. However, the store today presents a huge variety of such devices, and making the right choice can sometimes be quite difficult. Among others, you will find Gepard gas boilers, which have been known to the Russian consumer for more than a year. This equipment is inexpensive, solid, and also belongs to the middle class and has European quality. It is possible to verify this by reviewing the characteristics presented below.

Characteristics

Gas boilers "Gepard" double-circuit type are used for heating and providing housing with hot water. The liquid is heated separately, sanitary water enters the radiators and the bathroom, while drinking water goes to the kitchen. The system has a built-in water heater, the volume of which can be from 30 to 60 liters. If there are several points of water intake in the house, then a larger volume of liquid is consumed, in this case it is best to install the second option.

Single-circuit gas boilers "Gepard" have At the same time, the maximum consumption of heated water is possible without unnecessary load. The designs use room temperature controllers, and the liquid for heating and water supply systems is heated separately. Among the popular models of the manufacturer, Protherm "Panther 25 KTV" can be distinguished. This is wall-mounted equipment with a maximum power of 24.6 kW. The device has a closed combustion chamber and costs 33,600 rubles. If we are talking about the Protherm "Gepard 23 MTV" model, then its maximum power is 23.3 kW, and the cost is 27,600 rubles. The Gepard series is represented by both closed and open combustion chambers. The first version of the boilers can be installed in a room where there is no chimney. This is ensured by a coaxial system, due to which gases are removed.

Reviews about the boiler "Proterm Gepard 23 MTV"

If you are interested in Gepard gas boilers, then you can pay attention to the characteristics of the model mentioned in the subtitle. Installation in the apartment will take a minimum amount of time and money, the equipment will be able to maintain a comfortable temperature. Heating is carried out in the range from 38 to 60 ° C, with regard to hot water supply, and from 38 to 80 ° C - for the heating system. According to buyers, the design is quite sensitive to hard water, so it's best to take care of the cleanliness of the liquid. For this, a filter is installed. Buyers also like the fact that this equipment goes on sale without extra charges, so you can purchase devices at a minimal cost.

Boiler installation

Gepard gas boilers, the reviews of which you could read above, must be installed taking into account the requirements, they provide for the need for an area that must be equal to 4 m 2 or more. The ceiling height must be 2.5 m. The width of the door must be equivalent to 80 cm, the unit must be illuminated through the openings. The presence of window openings is also stipulated by the rules. For every 10 m 2 of the room there should be at least 0.3 m 2 of windows. When the Proterm Gepard gas boiler is installed, it is important to ensure good ventilation in the room, because gas combustion is provided by fresh air. The area of ​​the oxygen entry hole should be equivalent to 8 cm2 per kilowatt of power. Pipes through which gas will be transported must be made of metal. Flexible hoses are only used to connect consumers.

The power supply system of the equipment must have a circuit breaker with thermal protection. Gas equipment must be located in the basement of a private residential building. If we are talking about a multi-storey apartment building, then a gas boiler in the basement cannot be placed. The gas boiler "Proterm Gepard" must be equipped with a meter. From it should be removed at least 20 cm, this also applies to flammable materials. Depending on the power of the equipment, the distance between the wall and the boiler can be from 30 to 50 cm.

Boiler device

The gas boiler "Gepard 23" consists of a body, inside of which a combustion chamber is located. Outside, its walls are covered with insulating material. Below is a gas burner and an igniter. Above is the main heat exchanger made of heat-resistant steel or cast iron, the coolant passes through it. The secondary heat exchanger is located outside the combustion chambers. An automatic element is installed in front of the burner, which provides for the presence of a gas valve and a thermostatic regulator. For mixing and distributing water flows, in addition to the main equipment, the device is equipped with a circulation pump, an expansion tank and a fan for forced supply of fresh air.

The main malfunctions of the boiler

The Gepard gas boiler, the price of which was mentioned above, may encounter some malfunctions during operation. For example, error f28 on the display indicates that the ignition attempt was unsuccessful. You should blow out the nozzles, and also check the flow of gas. After that, you need to try to ignite again. But if you saw error f75 on the display, then this indicates a repetition of the error in checking the pressure level. In this case, you should call a specialist to inspect the condition of the heating system.

Conclusion

After installing the Gepard gas equipment, the first settings must be performed by a company specialist. This is required in order to select the most suitable pressure level for the heating system and set the temperature indicators at the desired level. Otherwise, the equipment may not be covered by the warranty.

Models of wall-mounted double-circuit boilers Cheetah: 23 mtv / 23 mov, 11 mtv

Security systems Proterm Gepard with a closed combustion chamber

Safety devices blocking the machine and requiring a reset (RESET) in the event of a fault

Overheating and temperature limits

Recording element: Flow and return temperature sensors

97 C - maximum temperature - Error F20
T - rises faster than 10 K / s - Error F24
T (flow-return) more than 35 K - Error F23

Flame control

Recording element: Ignition and ionization electrodes

Two ignition attempts lasting 7 seconds with a wait of 30 seconds - Error F28 (in case of no flame after 2 ignition attempts).

One ignition attempt lasting 7 seconds - Error F29 (flame failure during heating).

Gas

Registering element: Gas safety valve

0V when off / 24V then 16V in operation - Various faults are displayed depending on their origin

Removal of products of combustion (air consumption)

Registering element: Air pressure switch

12 kW at 25C: On 13 Pa, Off 10 Pa - Error F33
23 kW at 25C: On 71 Pa, Off 46 Pa - Error F33
25 kW at 25C: On 80 Pa, Off 68 Pa - Error F33
30 kW at 25C: On 59 Pa, Off 51 Pa - Error F33
On - contact closed; Off - contact open

Control functions of the gas boiler Protherm Gepard

Ignition of the burner depending on the preliminary state of the apparatus

If the boiler has been switched off: When the appliance is switched on with the mains switch, the water circulation in the heating circuit is checked.

The procedure is as follows: the overrun mode of the pump is started to determine the temperature, the presence of a heat demand in the heating circuit is determined; if there is no request, exit to the burner blocking mode, if there is a request, further process: the burner will turn on at 90% power for 3 seconds, or the temperature should increase by at least 5 K.

If not, the burner will turn on at maximum power for 15 seconds.

As soon as a temperature rise of 5K is registered, the burner will switch to normal operation.

Otherwise, the boiler will turn on the fault indication and block the operation.

This will be the same error as with a lack of coolant pressure.

This function provides protection in case of overheating, lack of water in the heating circuit, presence of air in the heating system, blocking the pump.

If the boiler has already been turned on: The principle is the same, except that the appliance is turned on at about 60% of the maximum power and the temperature is increased by 2K instead of 5K.

After the ignition phase, the regulator controls the burner during heating of the heating circuit (initial phase - reduction to Pmin to analyze the temperature change) or hot water (power is adjusted according to the current need).

Heat carrier temperature control

After the start of the wall-mounted boiler Proterm Gepard 23 mtv / 23 mov, 11 mtv, it works with a minimum power in the range from 1 to 5 minutes:

1 minute if heat demand is high;
- 5 minutes if heat demand is low.

After this period, the output is adjusted according to the requirement of the heating system.

The burner is switched off when the set coolant temperature + 2K is reached.

Also, you can use a room thermostat with a two-position principle (on / off), but with less efficiency.

Domestic hot water heating control

Boiler heating control (only for single-circuit devices):

There are two types of control installed for boiler heating: either thermostat side control (ON/OFF contact) or NTC sensor control based on thermistor.

In any case, the burner is turned on to heat the tank with a preliminary 30-second overrun of the pump. This helps to avoid blocking the boiler in case of too high a temperature difference between the temperature of the boiler and the heater.

Boiler equipped with thermostat:

The burner turns on when the thermostat contacts are closed,
- thermostat cut-off temperature - 75C (burner turns off at 80C).
- opening the thermostat contacts stops the burner and turns on the pump overrun for 30 seconds.

Boiler equipped with NTC sensor:

The boiler temperature is set directly in the user menu on the control panel of the Proterm Gepard double-circuit boiler.

The NTC sensor allows you to constantly monitor the temperature in the boiler and subsequently control the temperature of the coolant in the primary circuit.

The request for heating the boiler occurs at the moment when the temperature in it drops below the set temperature by 5 degrees, the control panel switches to the DHW position and the boiler pump is turned on.

Boiler heating stops when the NTC sensor detects the set water temperature in the boiler. The pump runs for 30 seconds (3-way valve still in the hot water position) and then stops.

Boiler heating control, when the boiler is equipped with an LTC sensor, is carried out by means of self-change: the sensor measures the temperature 5 minutes after the burner is switched off.

If the set point has been exceeded, a correction is applied to subsequent heating (the burner will switch off at a lower temperature to prevent this overtemperature from occurring again).

The heating medium temperature is calculated depending on the set DHW temperature. The heating medium temperature is always 15 K higher than the set DHW temperature.

Heating control during water dispensing (only for double-circuit devices)

Definition of requirements: The burner is switched on at a flow rate of 1.5 l/min. Switches off at 1.1 l/min. This hysteresis is a protection against periodic switching on/off of the burner.

Temperature control: The hot water temperature is controlled by setting the target temperature on the machine's supply line. This calculation depends on the flow dynamics of running water and its set temperature.

The calculated flow temperature of the primary circuit will be adjusted according to the return temperature sensor (NTC 5) to take into account the influence of the cold water inlet temperature.

Hot start function - Comfort (only for two-circuit models)

The hot start function is designed to maintain the temperature in the primary circuit of the boiler to improve comfort when using domestic hot water:

Reduced waiting time at the hot water tap;
- water conservation.

This function is implemented only on Protherm Gepard 23 mtv / 23 mov, 11 mtv and is relevant for small distances from the heat generator to the draw-off point.

Economy mode in relation to gas consumption - the "hot start" function is disabled (factory setting).

Principle of operation:

The hot start function is enabled or disabled in the setup menu (d.66)

The burner switches on when the temperature in the primary circuit falls 30 K below the set DHW temperature.

The burner switches off when the temperature reaches a difference of 10 K below the set DHW temperature.

The ECO symbol will appear on the display when the set DHW temperature is below 50C.

Other functions of the gas boiler Cheetah

Frost protection

Frost protection will work if the coolant temperature is below 12C.

The pump will turn on for 10 minutes, the priority valve will switch to the middle position (The heated coolant will flow simultaneously to the heating circuit and to the circuit of the plate heat exchanger):

If the temperature is below 7C, the burner will light up and the coolant will heat up to 35°C.

If the coolant temperature is in the range from 7 to 15C, the burner will turn on after 30 minutes and heat the coolant up to 35C.

At a coolant temperature above 15C, only the pump will work, which will turn off after a 30-minute overrun.

Overheat protection and temperature limits

NTC sensors on the flow/return line protect the boiler from overheating by checking the maximum outlet temperature (97C when the burner is on or a rapid rise in temperature above 110C within 3 seconds).

Additional conditions associated with the flow of coolant in the heating system:

Temperature rise rate control (maximum temperature rise dynamics = 10K/sec.)
- control of the temperature difference between supply and return:

If T is greater than 30K - the burner operates with min. power for 10 minutes

If T is greater than 35K, error F23 will appear on the display.

If the error repeats 5 times, the boiler will switch off with the final definition of error F23, after which a "reset" will be required.

If the burner has been running for at least 60 seconds, the counter is reset to zero.

Service menu of gas boiler settings Proterm Gepard

Entering the service layer is possible with the help of a code.

The sequence of pressing the buttons to enter the service menu:

Press the MODE button (1) min. 7 sec.; the display will show the number 0
- use the + or – buttons (2) to set the number 96 or 35
- press the MODE button

The display will show the first service level parameter (d 0).

Changing the parameter value:

The parameter must be selected using the + or – buttons (2)
- Use the MODE button (1) to confirm its setting. The symbol = changes on the display and the value
- With the + or – buttons (2) you can change its value
- Change of value will be automatically saved in memory after 3 seconds and symbol = will be shown
- To enter the service level, press the MODE button

To enter the consumer level, press the MODE button for 3 seconds.

Automatic entry into the level for the consumer without pressing a button for 15 minutes.

Parameters of the service menu of the boiler Proterm Gepard

D.00 - Maximum power in the heating circuit

For 12 kW models - factory setting 12 kW
For models 23, 25 - factory setting 15 kW
For 30 kW models - factory setting 20 kW

D.01 - Pump overrun to heating

D.02 - Setting the anti-cycling mode

Restarting the burner after another shutdown.
This function can only be set for operation in a heating circuit.
Setting range - 2-60 minutes

D.04 - Temperature in the boiler (if an LTC sensor is connected) (only applies to single-circuit boilers)

Displays boiler temperature (NTC 1)

D.09 - Temperature of extract air (calculated value)

The desired extract air temperature is displayed, calculated depending on the outside temperature and the set heating curve (Only when
eBus room controller connected).

D.10 - Pump operation

0 = pump not running
1 = pump running

D.11 - Operation of the additional pump (accessory)

0 = pump not running
1 = pump running

D.16 - Heating requirement from room controller (connected to terminal X17)

0 = disabled (no requirement)
1 = on (requires heating)
If on the terminal block, the jumper will always be 1

D.17 - Control method

Depending on flow or return temperature control
0 = on serve
1 = on the return

D.18 - Pump mode

0 = with burner; the pump is running if the burner is on
1 = with room thermostat
2 = permanent operation: the pump runs as long as the WINTER mode is set.

D.19 - Setting the speed of the pump of the wall-mounted boiler Protherm Gepard 23 mtv/23 mov, 11 mtv

0 = burner operation: automatic speed in heating circuit, max. speed after burner off min. speed.
1 = Min. speed to the heating circuit, for d.h.w. preparation max. speed
2 = in heating automatic speed, with d.h.w. preparation max. speed
3 = always max. pump speed

D.21 - Comfort function

1 = Comfort function enabled
0 = Comfort function disabled

D.22 - DHW heating requirement (NTC sensor, thermostat or flow sensor)

0 = no demand for DHW heating
1 = there is a demand for DHW heating (boiler heating or DHW withdrawal)

D.23 - Heating requirement

0 = no heating demand
1 = there is a demand for heating

D.24 - Position of the air pressure switch (only turbo boilers)

ON = on (fan running)
OFF = off (fan not working)

D.25 - Requirement for DHW heating in the boiler by boiler or eBus controller

Allowing DHW heating by an external regulator:
0 = DHW heating disabled
1 = DHW heating enabled

D.35 - Position of the 3-way valve Proterm Gepard

100 = DHW
0 = heating
40 = middle position

D.36 - DHW flow

DHW flow measured by flow sensor

D.40 - RH inlet temperatures

The temperature of the RH is measured by the NTS 2 sensor

D.41 - Return flow temperatures

RH temperature measured by NTC 5 sensor

D.70 - Position of the 3-way valve (single-circuit boilers only)

0 = working position
1 = blocking operation (blocking the three-way valve in the middle position)
2 = position in the heating circuit

D.71 - Maximum temperature of extract air

Setting range from 45 to 80C

D.77 - Max. DHW heating capacity in the boiler (only single-circuit boilers)

Max. capacity for DHW heating.

D.85 - Min. boiler power

With this parameter you can increase the min. power of the apparatus when using the desired type of combustion products removal system

D.93 - Boiler type setting

Machine type varies depending on model version