This article contains all possible malfunctions and options for their elimination, as well as error codes for Mora boilers (Mora). All information is read in the following order: code - name - possible malfunction. If you have any additional questions, please leave them in the comments to this article.

If you are not 100% sure what exactly the problem is and that you can solve it, immediately contact the service center to diagnose and fix the problem.

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Error code E0 - The device is blocked

There is no gas supply. The burner is not active. The pump is off.
The internal elements of the control and regulation unit are broken. Replacement required.

Error code E1 - The boiler is blocked

Error code E1 may occur in the following cases:

Switches not closing. In this regard, no gas is supplied, the burner is not active, the pump is turned off.
Small amount of water in heating system. Possibly clogged filter. It needs to be cleaned.
Small amount of water in the heating system. Pump failure. Replacement required.
Not enough water in the heating system. The pump, instead of the recommended 2nd or 3rd stage, is installed on the first. Set the correct mode.
Presence of air pockets. It is required to pump water so that the recommended pressure value is established in the system. By switching the heating and hot water mode, bleed excess air. Reboot the unit.
Problems with the axis of the flow switch, it is either inactive or completely motionless. It is required to disassemble the switch box from the flow sensor housing. Try to free the jammed axle. If this does not work by turning the boiler on and off, push it with your finger.
Too much clearance between axle and drive arm and switch. The position of the plastic arm of the motion transmission must be set correctly.
Broken switch. Replacement required.
The electrical connection between the switch and the control and regulation unit is broken. Requires chain repair. Check wires.

Error code E2 - Mora's boiler stopped due to an accident

Error code E2 may occur in the following cases:

Gas supply interrupted. After the flame is turned off, the device tries to start again. The pump does not turn off until the machine is trying to start. Then he gets up.
The flame went out because there was no gas supply. Click the Reset button. Due to the fact that the burner is very dirty, the gas supply is difficult. AT this case partial combustion of the flame can be observed. The gas supply hole needs to be cleaned.
The electrode is broken or the power line is damaged. Make a replacement.
The ignition transformer is broken or the electrical connections are damaged. Make a replacement.
Absence or partial contact in the electrical connection circuit of the ignition transformer and the control and regulation unit. Check for a contact if you need to restore.
The phase and zero in the network are reversed. Connect the boiler correctly.
The backdraft fuse has tripped due to too high a rise in temperature due to the leakage of combustion products. This is possible with complete or partial obstruction of the chimney. Clean out pipes and chimney. To start, press the reset button.
Reverse fuse broken. Replacement required.
The electrical connection circuit of the reverse thrust fuse is damaged. Check connection. Reestablish.
Lack of contact between the reverse thrust fuse of the control unit. Restore contact.
The emergency thermostat has tripped because the temperature of the heating water has exceeded the maximum permitted value.
Incorrect gas supply. Find out the reason. Eliminate.
Breakdown of the emergency thermostat. Check out his work. At 95 degrees it should open. Install a new one if necessary.
The electrical connection of the emergency thermostat is missing. Check and fix.
Poor or no contact between the emergency thermostat and the control and regulation unit. Check, replace if necessary.
The ignition electrode is incorrectly installed. Install correctly, taking into account that the distance between the end of the electrode and the plate is 3-4 mm according to the norm.
Did not open gas valve. The result is that the flame is gone. For diagnostics, it is necessary to check the contact of the convector of the main gas valve in the control unit. Replace if necessary.

Error code E3 - The heating water temperature sensor is open

The device does not turn on in both modes. The gas supply to the burner is interrupted, as a result of which there is no flame, the pump is not turned on.
The heating water temperature sensor is broken. Replacement required.
The sensor has no contact. Check the connection.
Problems with the electrical connection circuit of the temperature sensor. Check and fix.
There is no contact between the temperature sensor and the control and regulation unit. You need to re-establish contact.

Error code E4 - Domestic water temperature sensor not closed

The Mora gas boiler operates in both modes. Instead of the sensor responsible for the temperature of domestic water, the heating temperature sensor starts to work. Accordingly, there are problems with regulating the desired temperature in the DHW circuit.

Faulty DHW sensor. Replacement required.
There is no contact with the temperature sensor. Check and restore.
There is no contact in the electrical connection circuit of the temperature sensor. Check and restore.
There is no contact between the temperature sensor and the control and regulation unit. Contact needs to be restored.

Error code E5 - Breakdown in the security module

The unit has been stopped due to an accident. With this error, the burner is turned off, the flame disappears due to a violation of the gas supply. The pump is running continuously.

The emergency thermostat is activated, as the temperature of the heating water exceeds the maximum allowable maximum value. This cuts off the gas supply. To eliminate it, you need to understand why the overheating occurred.
Breakdown of the emergency thermostat. It is necessary to check its operation, at temperatures below 95 degrees it must be closed. If the failure is confirmed, a replacement is required.
Breakage of the electrical connection circuit of the emergency thermostat. Requires verification and restoration work.
There is no contact between the emergency thermostat and the control and regulation unit. Troubleshooting and repair required.
Pressure switch connection missing. It is necessary to check the patency of the path for the removal of combustion products or the supply of clean air. Fix the problem.
Pressure switch broken. There is no connection to it when the fan is running. A new switch needs to be installed.
Problems in the electrical connection circuit of the pressure switch. Check and repair circuits.
There is no contact between the pressure switch and the control and regulation unit. Restore contact.
The tubing connecting the pressure switch and the fan has either become disconnected or damaged. You need to check and put a new one if required. Maybe the fan is not starting.
The engine is not running. The impeller bearing has lost its mobility.
The valve does not work due to any mechanical damage. With this problem, the fan needs to be checked and replaced.
There is no fan electrical circuit contact. There is no fan blade speed set. Check and fix.
There is no contact between the fan and the control and regulation unit. To set up a contact.

Possible breakdowns of Mora gas boilers that are not displayed on the screen

In addition to the error codes that the screen of the Mora heating boiler displays in case of malfunctions, there are breakdowns that the screen does not detect, but timely repair of the unit is still required.

The device cannot gain the necessary power for operation.

At the same time, the temperature of the water in the hot water supply or for heating does not rise to the set value.

The boiler always goes into minimum power mode during operation.

Problems in the electrical connection circuit of the modulator to the coils. Check the cable and contact in the control and regulation unit. Damage to the modulator on the coil. To resolve this issue, you need complete replacement gas valve. The unit is not configured, its minimum and maximum powers are set with an error. Re-adjustment of these parameters is required.

The appliance does not work in DHW mode

The burner does not turn on, there is no water heating. Weak water supply for household needs.
The DHW filter is heavily soiled. It needs cleaning.
The differential valve is heavily soiled. It needs cleaning.
The water supply pressure is lower than required. To fix the problem, you need to increase the water supply pressure.
If there is sufficient water pressure on the DHW, the three-way valve does not switch. Check the water passage between the differential valve and the three-way valve. Clean if necessary.
The 3-way valve has stuck. Try to fix the problem by turning the DHW supply on and off. If this procedure fails, install a new valve.
Possible breach of integrity membranes in the hydraulic part of the three-way valve. You need to install a new one.
The water supply is sufficient, the three-way valve switches from mode to mode. Check the clearance between the 3-way valve shaft, the transfer arm and the switch.
Perhaps it's too big. You need to make adjustments.
Breakage of the DHW switch. Replacement required.
The problem is in the electrical connection between the switch and the control unit. Repair the chain.

The Mora wall-mounted boiler has problems with hot water supply, the working burner does not have water heating for household needs or is insufficient

With good water supply pressure, the water in the taps is not heated to a sufficient amount. The problem is a heavily contaminated secondary heat exchanger. It needs cleaning.
After the heating water is heated to the required temperature, the pressure increases to two and a half bar. After that, the safety valve is activated, and part of the water is discharged through it. At the same time, when the water in the heating system cools, the pressure drops below the maximum permissible minimum value.
Problems with expansion tank. Possibly a seal failure. And you need to check the valve, and if it is damaged, install a new one. After that, you need to pump in the pressure set by the manufacturer.
The membrane in the expansion tank is damaged. A new expansion tank needs to be installed.
The pressure of the water supply for household needs is so high that it increases the pressure in the heating system to two and a half bar. It is necessary to check the valve on the hydroblock to replenish the heating system, it may be open.
When operating the device in automatic mode are not deleted air locks. Valve cap too tight. Check it, unscrew it if necessary.

Errors and malfunctions of gas boilers Mora Top

Gas boiler malfunctions Mora Top with display indication

Error E0- The boiler does not work

The gas does not pass through the gas valve, the burner is off, the pump is not working.

Malfunction of the internal element of the control and regulation unit - Replace the control and regulation unit.

Error E1- Wall-mounted boiler Mora Top does not work

The switch does not close. The gas valve does not open the gas passage, the burner does not ignite, the pump does not work.

1. Lack of water in the heating system, clogged heating water filter - Clean the filter.

2. Lack of water in the heating system, defective pump - Replace the pump.

3. Lack of water in the heating system, the pump is set to stage 1 - Set the pump to the recommended stage 2 or 3.

4. Lack of water in the heating system, there is air in the system - Addition of water to the recommended pressure. Deair the heating system by switching the heating and domestic water heating modes. Turn the boiler off and on again with the ON/OFF button.

5. Insufficiently movable or completely immobile axis of the heating water flow switch, which transmits movement to the switch - Remove the switch box from the flow sensor body (pull out the stopper). By turning the boiler on and off again (switching the pump on and off), the fixed axle can be released. If the axis remains motionless, then you can move it with your finger.

6. Large clearance between axle, drive arm and switch - Correct the position of the plastic drive arm.

7. Defective switch - Replace the switch.

8. The electrical connection circuit between the switch and the control and regulation unit is broken - Check the contact of the connector in the control and regulation unit. Check the wires to the switch.

Error E2- Wall-mounted boiler Mora Top does not work

Extinguishing of the burner as a result of a violation of the gas supply through the gas fittings. When the flame goes out, the next ignition attempt occurs. The pump runs until the next ignition attempt, then stops.

1. Loss of burner flame due to gas failure - Press the RESET button.

2. Loss of flame due to clogged burner (eg only partially lit) - Clean burner - outlets.

3. Electrode failure - electrical connection line broken - Replace electrode.

4. Malfunction of the ignition transformer or broken power line - Check and replace the ignition transformer.

5. Incomplete or broken contact in the electrical connection circuit of the ignition transformer and the control and regulation unit - Monitoring the contact of the connector in the control and regulation unit.

6. Not correct connection phases when connecting the boiler to the mains - Carry out the correct connection of the phases.

7. Switching off the backdraft fuse in case of excess temperature as a result of leakage of combustion products (partial or complete obstruction of the chimney) - Control of the patency of the combustion paths - exhaust pipes or chimney. To resume the boiler function, press the RESET button.

8. Defective reverse thrust fuse - Replace fuse.

9. The electrical connection circuit of the reverse thrust fuse is broken - Control of the electrical connection line.

10. Broken contact in the connection of the reverse thrust fuse and the control unit - Check the contact of the connector in the control and regulation unit.

11. Shutdown of the emergency thermostat as a result of exceeding the maximum temperature of the heating water. Gas supply failure to the burner - Find out the cause of the water overheating.

12. Defective emergency thermostat - Control of the emergency thermostat (should be closed below 95°C), replace if necessary.

13. Violation of the electrical connection circuit of the emergency thermostat - Control of the electrical connection line.

14. The contact in the connection of the emergency thermostat and the control and regulation unit is broken - Control of the contact of the connector in the control and regulation unit.

15. Incorrect position of the ignition electrode - Check the position of the electrode. The distance between the end of the electrode and the burner plate should be 3-4 mm.

16. Loss of flame due to non-opening of the main gas valve - Monitoring the contact of the connector of the main gas valve in the control unit. Replace defective valve.

Error E3- The heating water temperature sensor is open. The Mora Top gas boiler does not work either in heating mode or in domestic water heating mode.

Extinguishing of the burner flame as a result of a violation of the gas supply through the gas fittings, the pump does not work.

1. Malfunction of the heating water temperature sensor - Replace the temperature sensor.

4. The contact in the connection between the temperature sensor and the control and regulation unit is broken - Check the contact of the connector in the control and regulation unit.

Error E4- DHW temperature sensor open - Mora Top gas boiler continues to operate in heating mode and in DHW heating mode.

The temperature control function is taken over by the heating water temperature sensor - problems with maintaining the temperature of domestic water.

1. Malfunction of the domestic water temperature sensor - Replace the temperature sensor.

2. The contact of the temperature sensor connection is broken - Control of the contact of the connection.

3. Violation of the electrical connection circuit of the temperature sensor - Control of the electrical connection line.

4. The contact in the connection between the temperature sensor and the control and regulation unit is broken - Control of the contact of the connector in the control unit.

Error E5- Malfunction on the safety module - Mora Top boiler does not work.

Extinguishing of the burner flame as a result of a violation of the gas supply through the gas fittings, the pump runs constantly.

1. Shutdown of the emergency thermostat as a result of exceeding the temperature of the heating water. Cut off the gas supply to the burner - Find out the cause of overheating.

2. Defective emergency thermostat - Control of the emergency thermostat (should be closed below 95°C), replace if necessary.

3. Violation of the electrical connection circuit of the emergency thermostat - Control of the electrical connection line.

4. The contact in the connection of the emergency thermostat and the control and regulation unit is broken - Control of the contact of the connector in the control unit.

5. Non-connection of the pressure switch - obstruction of the paths for the removal of combustion products or the air supply - Eliminate the cause of the obstruction of the combustion paths.

6. Defective pressure switch - when the fan is turned on, it does not connect - Replace the pressure switch.

7. Violation of the circuit of the electrical connection of the pressure switch - Control of the electrical connection line.

8. The contact in the connection of the pressure switch and the control and regulation unit is broken - Check the contact of the connector in the control unit.

9. Loss or damage of the tube connecting the pressure switch and the fan - Check, if necessary, replace the tubes.

10. Fan does not accelerate, burnt motor, hardened impeller bearing, mechanically blocked valve - Check fan function, replace if necessary.

11. Violation of the fan electrical connection circuit - the fan does not accelerate - Control of the electrical connection line.

12. The contact in the connection between the fan and the control and regulation unit is broken - Control of the contact of the connector in the control unit.

Malfunctions of Mora Top gas boilers without indication on the display

The boiler has insufficient power - the temperature of the heating or utility water does not reach the set value

The Mora Top boiler operates constantly at minimum power.

1. Fault in the electrical connection of the modulating coil - Checking the supply cable of the modulating coil. Control of the connector contact in the control and regulation unit.

2. Defective modulator coil - Replace the gas valve.

3. Incorrectly adjusted maximum and minimum power of the boiler - Adjustment of the maximum and minimum power of the boiler.

Mora Top wall-mounted boiler does not heat domestic water - the burner does not light

A. A small flow of domestic water.

1. Clogged domestic water filter - Clean the domestic water filter.

2. Loaded differential valve - Clean the differential valve.

3. Low water pressure - Increase water pressure.

B. Domestic water flow is sufficient, but the 3-way valve is not adjustable.

1. The pipes between the differential valve and the 3-way valve are clogged - Clean the connecting pipes.

2. Solidified three-way control valve - Swing the valve by turning the domestic water on and off. Replace 3 way valve.

3. The diaphragm in the hydraulic part of the three-way valve is cracked - Replace the diaphragm.

C. The flow of domestic water is sufficient, three-way valve rearranged.

1. Large gap between the axis of the repositioned three-way pilot valve, the movement transfer arm and the switch - Adjust the movement transfer arm.

2. Defective domestic water switch - Replace the switch.

3. Violation of the electrical connection circuit between the switch and the control and regulation unit - Monitoring the contact of the connector in the control and regulation unit.

Wall-mounted boiler Mora Top does not heat up domestic water enough or does not heat at all - the burner is on

Water flow is sufficient low temperature household water.

Loaded secondary heat exchanger in the hydroblock - Clean the heat exchanger.

Heating water flows out through the safety valve

A. After heating the heating water, there will be an increase in pressure in the heating system by 2.5 bar - water flows out through the safety valve; when the heating water cools down, the pressure will decrease - less than the filling pressure.

1. Expansion vessel gas leakage - Check the valve on the expansion vessel, if necessary, replace it; increasing the pressure to the recommended value.

2. The diaphragm in the expansion vessel is cracked - Replace the expansion vessel.

B. The pressure in the heating system is increased by 2.5 bar with the pressure of domestic water.

The valve on the hydroblock for adding water to the heating system is not closed - Close the valve.

The boiler is poorly deaerated

Cap on the purge valve is tightened - Check the cap on the purge valve. He must be released.

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Error codes for boilers Mora (Mora)

List possible errors and malfunctions arising during the operation of the Mora boiler

Errors and malfunctions of the Mora electric boiler of the ELECTRA series with direct heating.

Less serious faults are signaled by the yellow "ALM" LED, which flashes at a frequency of 1 Hz if the fault has not been eliminated. The current fault code is determined by turning the switch. In the event of a malfunction, the boiler continues to heat, but with less comfort, as it will automatically switch to work in a lower operating system (SO1, SO2). In the operating systems SO1, SO2, SO3, remote signaling is performed by opening the contacts of the RM13 relay. Malfunction - code 13 is signaled if there is a critical decrease in the electrical, insulating resistance of one or more heating elements in the boiler body. The display of the code lasts 10 seconds, after which the value of the operating time of the heating elements will be displayed. The electric boiler software defines this heating as a critical decrease in electrical, insulating resistance, if there is no request from a TUV thermostat, TV or outdoor sensor. When generating a fault with code 13, regulation circulation pump given by the parameter for temperature run ID 66.

1. Fault code 08. No breakdown, normal operation, the boiler heats and displays working condition.

2. Fault code 09. The sensor for measuring the DHW temperature is defective.

3. Fault code 10. Outside temperature sensor defective.

4. Fault code 12. Modem not available - weak signal.

5. Fault code 11. The cascade line is broken.

6 . Fault code 13. Violation of the insulation of the heating elements.

If the fault is serious, the operating alarm is turned off and the fault code is displayed using LED diodes. An indication of a malfunction that has occurred is expressed by a constant yellow glow of the ALM LED. The boiler stops heating and after a maximum of 9 seconds, the boiler power is turned off. All features are disabled. Only the pump run remains active! The pump overrun is not performed if the fault code number is 01. In the operating systems SO1, SO2, SO3, the alarm is performed by opening the contacts of the RM13 relay. After the release of residual heat from the electric heat exchanger, the pump will be switched off if parameter ID 66 is greater than the actual temperature of the water in the boiler. In case the time counting method is set, the pump is switched off after the end of the time delay (parameter ID 65).

1. Fault code 01. Loss of pressure.

2. Fault code 02. Boiler overheating.

3. Fault code 03. RESERVE.

4. Fault code 04. Defective sensor for measuring the water temperature in the boiler.

5. Fault code 05. Defective EEPROM memory block.

6. Fault code 06. Defective RAM+RTC memory block.

7. Fault code 07. Defective control potentiometer.

Errors and malfunctions that are possible during the operation of the MORA W boilers.

Troubleshooting can only be carried out by a trained contractual service organization and they are also obliged to make an entry in the appendix to the warranty sheet.

1. After switching on the boiler, the control lamp on the main switch does not light up.

2. Replace switch.

2. The boiler cannot be put into operation - the ignition electrode for ignition of the ignition burner does not spark.

Possible reasons faults:

1. Malfunction of automation.

3. Electrode failure.

Troubleshooting methods:

1. Control of the error-free connection of the electrode with the output VN (high voltage) on the automation.

2. Replace automation.

3. Replace the electrode.

3. The boiler cannot be put into operation - sparking occurs in the spark gap of the automation (the sound of sparking in the automation is heard) (natural gas).

Possible causes of the malfunction:

1. Poor spark gap setting.

2. Poor connection of the conductor to the electrode or defective electrode.

Troubleshooting methods:

1. Adjust the spark gap.

2. Check the condition of the electrodes and the connection of the ignition and grounding conductors.

4. The boiler does not ignite - the ignition burner burns Ts="50" sec (the "unblocking" button in the network module lights up).

Possible causes of the malfunction:

1. The gas supply to the boiler is interrupted.

2. There is air in the gas tube.

3. The gas valve does not open.

Troubleshooting methods:

1. Gas pressure control in the gas drive.

2. Control of the opening of the gas valve of the boiler.

3. Remove air.

4. Replace valve.

5. The boiler ignites and quickly goes out (the "unlock" button in the network module lights up).

Possible causes of the malfunction:

1. Poor connection of ground and phase conductors.

2. Poor diameters of the gas nozzles in the burner.

3. Impassable dirt filter at the inlet of the gas valve.

Troubleshooting methods:

1. Control and replacement of connection terminal U-phase conductor terminal N-terminal conductor.

2. Check if the nozzle diameter is in main burner corresponds to the values specified in the operating instructions.

3. Clean the gas valve filter.

6. The boiler does not ignite - the safety thermostat is disabled on the control panel in the network module, the signal lamp of insufficient temperature is lit.

Possible causes of the malfunction:

1. Lack of water in the system.

Troubleshooting methods:

1. Monitoring the water pressure in the system and, if necessary, adding water.

2. Unblock in the TV network module.

7. A boiler for household purposes is connected to the boiler according to the proposed scheme and water heating for household purposes does not flow in the first place.

Possible causes of the malfunction:

1. poor connection of the three-way valve "Honeywell V 4044F"

2. Bad three-way valve.

Troubleshooting methods:

1. Check the valve connection.

2. Replace valve.

8. A boiler for household purposes is connected to the boiler according to the proposed scheme and the water for household purposes is not heated to the required heat.

Possible causes of the malfunction:

1. Poor temperature setting on thermostats.

2. Bad temperature sensor or heater or boiler thermostat.

Troubleshooting methods:

1. Carry out the setting.

2. Replace the defective safety or regulation element.

9. Blocking the fuse for the return flow of combustion products (the overtemperature warning light on the control panel in the network module is lit).

Possible causes of the malfunction:

1. Strong wind causes back pressure.

2. The chimney is clogged.

Troubleshooting methods:

1. Unlock the flue gas return fuse - unlocking is available in the network module on the TS control panel.

2. Clean the chimney and unlock the flue gas return fuses with the TS button.

10. After switching on the boiler, the control lamp on the main switch does not light up.

Possible causes of the malfunction:

1. There is no voltage at the boiler inlet.

2. Malfunction of a control bulb.

Troubleshooting methods:

1. Check the voltage in the email. socket.

2. Replace switch.

11. The boiler cannot be put into operation - the ignition electrode does not spark.

Possible causes of the malfunction:

1. Malfunction of automation.

2. The drive to the ignition electrode is interrupted.

3. Electrode failure.

Troubleshooting methods:

1. Replace automation.

2. Control of the error-free connection of the electrode with the output VN (high voltage) on the automation.

3. Replace the electrode.

Mora boiler repair in Ufa

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High-class specialists with extensive experience;
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- Quick departure for the repair of boilers in Moscow and throughout the Moscow region;
- Troubleshooting is carried out using only professional tools;
- Repair of boilers is carried out using original spare parts;
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Our specialists service center will repair any malfunctions, for them there are no difficult tasks that cannot be solved.

The professionals of our company will repair the boiler as quickly as possible, by 90% in one visit.

Common causes of malfunction leading to boiler repair:

The installation of the heating system was carried out unprofessionally, not observing the conditions;
- non-compliance with the manufacturer's recommendations for operation heating equipment;
- the necessary technical manipulations are not carried out after-sales service, which must be carried out annually;
- no extras are used protective equipment like a voltage stabilizer.

Common malfunctions and boiler repairs:

The flame in the burner goes out when the unit starts;

A lot of soot is formed;

Loud claps are heard during the operation of the equipment;

The boiler does not turn on and does not respond to the reset button;

The pressure in the heating system constantly drops.

If you have problems with the operation of boiler equipment Call us, the masters of our company will come to you at urgently in order to carry out repairs of heating boilers of any manufacturer in the shortest possible time. Specialists constantly improve their knowledge and increase their experience by leaving for the repair of heating boilers of any degree of complexity.

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Wall mounted gas flow heating MORA boilers designed for space heating with heat losses up to 18 or 23 kW.

Standard boilers are used for space heating and can also be adapted to heat domestic water in an attached storage water heater.

Combined boilers serve both for heating and for heating domestic water.

The removal of combustion products in boilers of this type is carried out into the chimney or with the help of a fan ("Turbo")

		Combined boilers	Standard boilers

Boilers with combustion products removal	down the chimney
Boilers with combustion products removal	"turbo" - version C 12

Boiler installation. Commissioning

During installation, commissioning and maintenance of the boiler, it is necessary to observe certain rules established by state standards and the requirements of the manufacturer. The user must carefully study the "Operation Manual", "Warranty Card" and in the future be guided by the rules set forth in them.

Mounting

For installation of the boiler, as well as for its further safe and economical operation, it is necessary to have a qualified project for the entire heating system. The boiler may only be installed by a specialized service organization authorized by the manufacturer. Only the type of gas that is indicated on the type plate of the product can be used for the operation of the boiler. The installed and assembled boiler must not be moved to a new location. The boiler must be installed in such a way that the socket for the electrical connection of the boiler is located in accessible place. If it is necessary to intervene in the operation of the boiler, it is imperative to pull out the plug from the mains socket. The boiler is designed for mounting on a wall made of non-combustible material. On the boiler itself and at a distance of 100 mm from it there should not be objects made of combustible materials.

Main dimensions

MORA 5118, 5122

MORA 5120, 5121, 5124, 5125

MORA 5119, 5123

Commissioning

The commissioning of the boiler can only be carried out by a specialized service organization authorized by the manufacturer, which has a permit (license) from the relevant State supervision services.

When putting the boiler into operation, a specialist of an authorized service organization is obliged to carry out the following:

check tightness of connections

to adjust the boiler (if necessary)

control all functions of the boiler

familiarize the User with the rules for servicing the boiler and caring for it

notify the User of the need to comply safe distances from the boiler to walls made of combustible material and how to protect them

Description of the boiler

Heating - with attached room thermostat

The boiler will start working when it receives a signal from the room thermostat to reduce the temperature in the heated rooms.
After receiving the signal, the pump accelerates, and the gas valve opens the gas flow to the main burner. Heating water flows from the pump to the heat exchanger, where it is heated and then enters the heating system.
The heating water temperature is recorded by the heating water temperature sensor. Heating of heating water continues until the boiler is turned off when the desired (set) temperature in the heated premises is reached.
Thus, the process is repeated as long as the boiler is connected to the mains.
The heating water temperature is set to the maximum value.

Heating - without room thermostat

The pump runs constantly. The operation of the boiler is controlled by the control and regulation unit in accordance with the temperature of the heating water set by the user with the control knob on the boiler panel

Domestic hot water heating (combined boilers)

Domestic hot water heating has priority over heating water heating.
The flow of water through the domestic water flow fuse will introduce the boiler into the process of heating domestic water when the 3-way control valve changes the direction of heating water flow, and it will pass through the secondary heat exchanger, and from there back to the pump. Domestic water is heated from the heated heating water in the secondary heat exchanger.
After the end of the selection of warm utility water, the boiler will automatically switch to the heating process.

Domestic hot water heating (standard boilers)

Boilers designed for heating can also be used to heat domestic water in the MORA storage water heater. The storage water heater is connected to the heating system, domestic water is heated by warm heating water ("WATER-WATER" system).
When installing the boiler together with storage water heater a three-way valve with an internal microswitch must be used, and room thermostat- These items are available upon request.

Security systems

The safe operation of the boiler is ensured by the following elements:

Heating and utility water flow sensors- they will not allow ignition of the main burner with insufficient water flow.

Emergency thermostat- closes the gas supply to the boiler when the maximum allowable temperature water in the heat exchanger.

Backdraft fuse (boilers with flue gas discharge into the chimney)
If contamination occurs chimneys(even partial), which will contribute to the ingress (leakage) of combustion products into the room, then the back draft fuse will register an increase in the temperature of the surrounding space and cause the gas supply to the main burner to close.
The boiler can be put back into operation by re-igniting the pilot burner only after the fuse has cooled down, i.e. after approximately 10 minutes.

Pressure switch (boilers with exhaust gases "TURBO")
If there is a blockage of the pipes for the removal of combustion products (even partial), or the combustion of fuel worsens (it will be lower established norm) under the influence of a decrease in fan speed (voltage drop in the mains), or the fan does not work, the pressure switch will not turn on the boiler, so that combustion products do not accumulate in closed chamber combustion.

The backdraft safety device or the pressure switch must always function during the operation of the boiler and nothing must affect their function (eg change of position).
If the backdraft safety device or pressure switch trips again, contact an authorized service organization to have the problem rectified and a working test carried out.

Boiler operation

Control Panel

The control panel in the boilers MORA 5118, 5120, 5121,5122, 5124, 5125 is located in the lower part of the boiler behind the casing and will be accessible if the casing is lifted up by approximately 100 mm.

"ON/OFF" button
When you press the "ON/OFF" button, the boiler turns on or off. When the boiler is turned on, the button will glow.

Heating water temperature adjustment knob
Designed to set the required heating water temperature in the range from 30 to 80°C. If the room thermostat is operating, the heating water temperature is set to the maximum value.

Mode switch "SUMMER-WINTER" (installed only on combined boilers)
When the switch is set to the "WINTER" position, the boiler is prepared for operation - heating heating water or utility water.
When the switch is set to the "SUMMER" position, the boiler is ready only for the process of heating domestic water. This mode is mainly used in summer period when there is no need to heat the premises.

Thermometer
Shows the temperature of the heating water at the outlet of the boiler.

For boilers MORA 5119 and 5123
- the thermometer is installed on the boiler casing
- the "ON/OFF" button and the heating water adjustment button are on the left, under the boiler

Preparing the boiler for work

When preparing the boiler for operation, the following must be done:

check the water pressure in the heating system

open the inlets and outlets of heating water (or utility water) - (valves under the boiler)

open the gas supply to the boiler

A qualified specialist of an authorized service organization, when putting the boiler into operation, must:

Check pump mode - must be set to stage 3.

Start the boiler according to the instructions

Check pilot burner flame

Extinguish the flame of the pilot burner - after 5-7 seconds the main burner should go out

After the pilot burner has gone out, check the response time solenoid valve in gas fittings - after 40-50 seconds a characteristic click should be heard.

Check the function of switching the boiler to reduced power

Carry out burner control:
check the main burner, the flame should only be near the outlets,
check the stability of the flame along the entire length of the burner plates.

Boiler start

The boiler is a fully automatic device. The main burner is ignited automatically by the signal from the boiler automation from the pilot burner, which is constantly on. The pilot burner is manually ignited. As additional equipment piezo ignition can be installed on the boiler.

Boiler ignition sequence

set the gas valve control knob (located under the boiler casing) to the position "ignition of the pilot burner". Keeping the handle pressed in this position, manually ignite the pilot burner (if there is an additionally installed piezo ignition, press the piezo ignition button several times until the pilot burner lights up);

after ignition of the pilot burner, continue to hold the gas valve button (approximately 5-7 seconds). Then let go and make sure sustainable burning ignition burner;

switch the gas valve handle to the operating mode. The boiler is ready for operation;

turn on the "ON / OFF" button - the button will light up. In the "Winter" mode, the main burner will light up, in the "Summer" mode, the boiler will start to work in case of hot water analysis.

Boiler decommissioning

long term
Long-term decommissioning of the boiler is carried out during maintenance and repair:

unplug the power cord from the socket

close the gas and water supply valves

short term

move the ON / OFF button to the "OFF" position

leave the power cord plug in the socket

leave gas and water supply valves open

Prevention. Maintenance. Boiler Operation Safety

Before starting operation, the User is obliged to carefully and thoroughly study the "Operation Manual.

Any manipulations and operations with the boiler that do not meet the requirements of the "Operating Manual" are unacceptable.

Installation, commissioning, preventive inspections and troubleshooting must be carried out only by trained specialists authorized by the manufacturer of a service organization that has the necessary state approvals and licenses. Information about all manipulations and operations with the boiler must be entered in the "Warranty Card".

During operation, the User must periodically monitor its operation.

gas boilers MORA should not be used for purposes other than those specified in the Instructions for Use.

The boiler must be turned off if work is being carried out in the room where it is installed, which can change the environment (for example, work with paints, adhesives, etc.). The boiler can be turned on and used only after such work has been completed and the room has been thoroughly ventilated.