This article contains all possible malfunctions and options for eliminating them, as well as error codes for Mora boilers. 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 - Device blocked

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

Error code E1 - Boiler is blocked

Error code E1 may occur in the following cases:

1. The switches do not close. Due to this, gas is not supplied, the burner is inactive, and the pump is turned off.
2. Small amount of water in heating system. The filter may be clogged. It needs to be cleaned.
3. Small amount of water in the heating system. Pump failure. Replacement required.
4. There is 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.
5. Presence of air pockets. It is necessary to pump water so that the recommended pressure value is established in the system. When switching heating and hot water modes, bleed off excess air. Reboot the unit.
6. Problems with the axis of the flow switch, it is either inactive or completely motionless. It is necessary 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.
7. The gap between the axle and the drive arm and the switch is too large. The position of the plastic arm for transmitting motion must be set correctly.
8. The switch is broken. Replacement required.
9. The electrical connection between the switch and the control and regulation unit is broken. The chain needs to be restored. Check the wires.

Error code E2 - Mora boiler stopped due to an accident

Error code E2 may occur in the following cases:

1. The gas supply is interrupted. After the flame is turned off, the device tries to start again. The pump does not turn off while the device is trying to start working. Then he gets up.
2. 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. IN in this case partial combustion of the flame can be observed. The gas supply port needs to be cleaned.
3. The electrode is broken or the electrical connection line is damaged. Make a replacement.
4. The ignition transformer is broken or the electrical connections are damaged. Make a replacement.
5. Absence or partial contact in the electrical connection circuit of the ignition transformer and the control and regulation unit. Check the presence of the contact if you need to restore it.
6. The phase and zero in the network are mixed up. Connect the boiler correctly.
7. The backdraft fuse tripped due to too high a temperature rise due to leakage of combustion products. This is possible with complete or partial obstruction of the chimney. Clean the outlet pipes and chimney. To start, press the reset button.
8. The reverse thrust fuse is broken. Replacement required.
9. The electrical connection circuit of the reverse thrust fuse is damaged. Check connection. Restore.
10. Lack of contact between the control unit backdraft fuse. Restore contact.
11. The emergency thermostat tripped because the heating water temperature exceeded the maximum allowed value.
12. Incorrect gas supply. Find out the reason. Eliminate.
13. Emergency thermostat failure. Check its operation. At 95 degrees it should open. Install a new one if necessary.
14. There is no electrical connection contact for the emergency thermostat. Check and fix.
15. Poor or no contact between the emergency thermostat and the control and regulation unit. Check and replace if necessary.
16. The ignition electrode is not installed correctly. Install correctly, taking into account that the distance between the end of the electrode and the plate is normally 3-4 mm.
17. Didn't open gas valve. The result is that the flame goes out. For diagnostics, it is necessary to check the contact of the main gas valve convector in the control unit. Replace if necessary.

Error code E3 - Heating water temperature sensor is open

1. The device does not turn on in both modes. The gas supply to the burner is interrupted, as a result there is no flame, the pump is not turned on.
2. The heating water temperature sensor is broken. Replacement required.
3. The sensor has no contact. Check the connection.
4. Problems with the electrical connection circuit of the temperature sensor. Check and fix.
5. There is no contact between the temperature sensor and the control and regulation unit. Contact needs to be restored.

Error code E4 - Domestic water temperature sensor is not closed

The Mora gas boiler operates in both modes. Instead of the sensor responsible for the temperature of the domestic water, the heating temperature sensor starts working. Accordingly, problems arise with regulating the required temperature in the DHW circuit.

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

Error code E5 - Failure in the security module

The unit was stopped due to an emergency. With this error, the burner turns off and the flame goes out due to a gas supply interruption. The pump runs continuously.

1. The emergency thermostat is triggered because the heating water temperature exceeds the maximum permissible maximum value. This cuts off the gas supply. To eliminate it, you need to understand why the overheating occurred.
2. Emergency thermostat failure. It is necessary to check its operation; at temperatures below 95 degrees it should be closed. If the failure is confirmed, replacement is required.
3. The electrical connection circuit of the emergency thermostat is broken. Requires verification and restoration of operation.
4. There is no contact between the emergency thermostat and the control and regulation unit. Troubleshooting and restoration required.
5. Pressure switch connection missing. It is necessary to check the patency of the exhaust path for combustion products or the supply of clean air. Fix the problem.
6. Pressure switch broken. There is no connection to it when the fan is running. A new switch needs to be installed.
7. Problems in the electrical connection circuit of the pressure switch. Check and restore circuits.
8. There is no contact between the pressure switch and the control and regulation unit. Restore contact.
9. The tube connecting the pressure switch and the fan is either disconnected or damaged. It is necessary to check and install a new one if necessary. Perhaps the fan does not start working.
10. The engine does not work. The impeller bearing has lost its mobility.
11. The valve does not work due to any mechanical damage. If this problem occurs, the fan must be checked and replaced.
12. There is no contact in the fan electrical connection circuit. There is no set speed of rotation of the fan blades. Check and fix.
13. There is no contact between the fan and the control and regulation unit. Make contact.

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

In addition to the error codes that the Mora heating boiler screen 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 power required for operation

In this case, the temperature of the water in the hot water supply or for heating does not increase to the set value.

When operating, the boiler always switches to minimum power mode

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

The device does not work in DHW mode

1. The burner does not turn on, the water is not heated. Poor water supply for household needs.
2. The DHW filter is very dirty. It needs cleaning.
3. The differential valve is very dirty. It needs cleaning.
4. Water supply pressure is lower than required. To fix the problem, you need to increase the water supply pressure.
5. If there is sufficient water pressure for the domestic hot water supply, the three-way valve does not switch. Check the water passage between the differential valve and the three-way valve. Clean if necessary.
6. The 3-way valve is stuck. Try to fix the problem by turning the water supply to the hot water supply on and off. If this procedure is unsuccessful, install a new valve.
7. Possible integrity violation membranes in the hydraulic part of the three-way valve. A new one needs to be installed.
8. The water supply is sufficient, the three-way valve switches from mode to mode. Check the clearance between the 3-way valve shaft, the motion transfer arm and the switch.
9. Perhaps it's too big. Adjustments are required.
10. Damage to the DHW switch. Replacement required.
11. The problem is in the electrical connection between the switch and the control unit. Restore the chain.

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

1. If the water supply pressure is good and the water in the taps is not heated to sufficient quantity. The problem is a heavily contaminated secondary heat exchanger. It needs cleaning.
2. After the heating water has heated to the required temperature, the pressure increases to two and a half bar. After this, the safety valve is activated and part of the water is discharged through it. In this case, when the water in the heating system cools, the pressure drops below the maximum permissible minimum value.
3. Problems with expansion tank. There may be a violation of its tightness. And it is necessary to check the valve, and if it is damaged, install a new one. After this, you need to pump in the pressure set by the manufacturer.
4. The membrane in the expansion tanks is damaged. A new expansion tank needs to be installed.
5. The water supply pressure 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 hydraulic unit to replenish the heating system; it may be open.
6. When operating the device in automatic mode are not deleted air jams. The valve cap is too tight. Check this and unscrew it if necessary.

Errors and malfunctions of Mora Top gas boilers

Malfunctions of gas boilers Mora Top with display indication

Error E0- The boiler does not work

Gas does not pass through the gas fittings, the burner has gone out, the pump does not work.

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

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

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

1. Lack of water in the heating system, the heating water filter is clogged - 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 - Add water to the recommended pressure. De-air the heating system by switching between heating and domestic water heating modes. Turn the boiler off and on again using the ON/OFF button.

5. Insufficiently movable or completely stationary axis of the heating water flow switch, transmitting 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 (turning the pump on and off), you can release the fixed axis. If the axis remains motionless, you can move it with your finger.

6. Large gap between the axle, the motion transmission arm and the switch - Correct the position of the plastic motion transmission 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- Mora Top wall mounted boiler does not work

The burner goes out as a result of a disruption in 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 as a result of a gas supply failure - Press the RESET button.

2. Loss of flame due to burner clogging (for example, only partially burns) - Clean the burner - outlet openings.

3. Electrode malfunction - the electrical connection line is broken - Replace the electrode.

4. Faulty ignition transformer or broken electrical connection 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. Don't correct connection phases when connecting the boiler to the electrical network - Make the correct phase connection.

7. Disabling the reverse draft fuse when the temperature is exceeded 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 the fuse.

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

10. The contact in the connection between the reverse thrust fuse and the control unit is broken - Check the contact of the connector in the control and regulation unit.

11. Disabling the emergency thermostat as a result of exceeding the maximum heating water temperature. Gas supply to the burner is interrupted - Find out the reason for the water overheating.

12. Defective emergency thermostat - Monitor the emergency thermostat (must be closed at temperatures below 95°C), replace if necessary.

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

14. The contact in the connection between the emergency thermostat and the control and regulation unit is broken - Check 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 failure to open the main gas valve - Check the contact of the main gas valve connector in the control unit. Replace the defective valve.

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

The burner flame goes out as a result of a disruption in 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- The domestic water temperature sensor is open - The Mora Top gas boiler continues to operate in heating mode and in domestic water heating mode.

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

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

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

3. Temperature sensor electrical connection circuit failure - Monitoring the electrical connection line.

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 unit.

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

The burner flame goes out as a result of a disruption in the gas supply through the gas fittings; the pump runs continuously.

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

2. Defective emergency thermostat - Monitor the emergency thermostat (must be closed at temperatures below 95°C), replace if necessary.

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

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

5. Non-connection of the pressure switch - obstruction of the combustion products outlet or 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 electrical connection circuit of the pressure switch - Monitoring the electrical connection line.

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

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

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

11. Fan electrical connection circuit is broken - the fan does not accelerate - Check the electrical connection line.

12. The contact between the fan and the control and regulation unit is broken - Check 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 service water does not reach the set value

The Mora Top boiler operates constantly at minimum power.

1. Violation of the electrical connection circuit of the modulation coil - Monitoring the supply cable of the modulation coil. Monitoring the connector contact in the control and regulation unit.

2. Defective modulation coil - Replacement of the gas valve.

3. The maximum and minimum boiler power are incorrectly adjusted - Adjust the maximum and minimum boiler power.

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

A. A small flow of domestic water.

1. The domestic water filter is clogged - Clean the domestic water filter.

2. The differential valve is stuck - Clean the differential valve.

3. Low water pressure - Increase water pressure.

B. The service water flow is sufficient, but the 3-way valve cannot be adjusted.

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

2. Hardened three-way controlled valve - Swing the valve by turning the service water on and off. Replace the 3-way valve.

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

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

1. Large gap between the axis of the rearranged three-way controlled 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 - Check the contact of the connector in the control and regulation unit.

The Mora Top wall-mounted boiler does not heat the domestic water insufficiently or does not heat the domestic water at all - the burner is on

There is sufficient water flow low temperature household water.

The secondary heat exchanger is stuck in the hydraulic unit - Clean the heat exchanger.

Heating water flows out through the safety valve

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

1. Gas leak from the expansion vessel - Check the valve on the expansion vessel, replace it if necessary; increasing the pressure to the recommended value.

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

B. The pressure in the heating system is increased by 2.5 bar due to the domestic water pressure.

The valve on the hydraulic unit for adding water to the heating system is not closed - close the valve.

The boiler does not ventilate well

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

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Mora boiler error codes

List possible errors and malfunctions that arise during operation of the Mora boiler

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

Less serious faults are signaled by the yellow LED diode “ALM”, which blinks at a frequency of 1 Hz if the fault is not eliminated. The current fault code is determined by turning the switch. If a malfunction occurs, the boiler continues to heat, but with less comfort, since it will automatically switch to operation in a lower operating system (SO1, SO2). In the operational systems SO1, SO2, SO3, remote signaling is provided 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 code display continues for 10 seconds, after which 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 requirement from the TUV thermostat, TV or external sensor. When generating a malfunction with code 13, regulation circulation pump given by the parameter for temperature run ID 66.

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

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

3. Fault code 10. The sensor for measuring the outside temperature is faulty.

4. Fault code 12. The modem is not accessible - the signal is weak.

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

6 . Fault code 13. Defective insulation of heating elements.

If the malfunction that occurs is serious, the operating alarm is turned off and a fault code is displayed using LED diodes. Indication of a malfunction is indicated by a constant yellow glow of the LED “ALM”. The boiler stops heating and after a maximum of 9 seconds the boiler power will turn off. All functions are disabled. Only the pump run remains active! The pump is not allowed to run if the fault code number is 01. In operational systems SO1, SO2, SO3, signaling is performed by opening the contacts of the RM13 relay. After releasing residual heat from the electric heat exchanger, the pump will turn off if parameter ID 66 is greater than the current water temperature in the boiler. If the time counting method is set, the pump turns 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 MORA W boilers.

Troubleshooting can only be carried out by a trained contract service organization and is also required to make a note in the appendix to the warranty certificate.

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

2. Replace the switch.

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

Possible reasons malfunctions:

1. Automation malfunction.

3. Electrode malfunction.

Troubleshooting methods:

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

2. Replace the automation.

3. Replace the electrode.

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

Possible causes of the malfunction:

1. The spark gap is poorly adjusted.

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

Troubleshooting methods:

1. Set the spark gap.

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

4. The boiler does not ignite - the ignition burner is on for Ts="50" seconds (the “unlock” button in the network module is lit).

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. Monitoring gas pressure in the gas drive.

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

3. Remove air.

4. Replace the valve.

5. The boiler lit up and quickly went out (the “unlock” button in the network module lights up).

Possible causes of the malfunction:

1. Poor connection of the neutral and phase conductors.

2. Poor diameters of gas nozzles in the burner.

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

Troubleshooting methods:

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

2. Check if the diameter of the nozzles is within main burner corresponds to the values ​​specified in the operating instructions.

3. Clean the gas valve filter.

6. The boiler does not light up - the safety thermostat is turned off on the control panel in the network module and the low temperature warning light is on.

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. Unlock in the TV network module.

7. A boiler for household purposes is connected to the boiler according to the proposed scheme and heating of water for household purposes does not occur 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 connection of the valve.

2. Replace the 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 settings on thermostats.

2. Bad temperature sensor or thermostat of the heater or boiler.

Troubleshooting methods:

1. Configure.

2. Replace the faulty safety or control element.

9. Blocking the combustion product return flow fuse (the overtemperature warning light on the control panel in the network module lights up).

Possible causes of the malfunction:

1. Strong wind causes back pressure.

2. The chimney is clogged.

Troubleshooting methods:

1. Unblock the combustion product backflow fuse - unlocking is available in the network module on the TS control panel.

2. Clean the chimney and unblock the combustion gas backflow fuses using the TS button.

10. After turning on the boiler, the control light 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 the control light.

Troubleshooting methods:

1. Check the electrical voltage. socket.

2. Replace the switch.

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

Possible causes of the malfunction:

1. Automation malfunction.

2. The drive to the ignition electrode is interrupted.

3. Electrode malfunction.

Troubleshooting methods:

1. Replace the automation.

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

3. Replace the electrode.

Mora boiler repair in Ufa

Our company offers its services for urgent repairs boilers for equipment located throughout Moscow and the Moscow region. We carry out troubleshooting professionally, quickly, efficiently, according to affordable prices, with a guarantee. The AIS company currently has more than 10 years of experience in boiler repair and can offer not only simple boiler repairs, but also annual maintenance and repair of breakdowns of any complexity.

Our engineers and craftsmen have a wealth of knowledge and skills, as well as professional tools without which boiler repairs cannot be carried out professionally.

We offer boiler repair:

Highest-class specialists with extensive experience;
- Processing your call regarding boiler repair as soon as possible;
- You will immediately find out over the phone the price for the repairs being carried out; we answer openly and honestly from the very beginning;
- Quick departure for boiler repairs in Moscow and throughout the Moscow region;
- Diagnosis of faults is carried out using only professional tools;
- Boiler repairs are carried out using original spare parts;
- Boiler repairs are carried out necessarily with a subsequent guarantee for the work done and spare parts.

Our specialists service center will repair any faults; for them there are no difficult tasks that cannot be solved.

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

Common causes of malfunction leading to boiler repair:

The installation of the heating system was carried out unprofessionally and did not comply with the conditions;
- failure to comply with the manufacturer's operating recommendations heating equipment;
- the necessary technical manipulations are not carried out service which must be carried out annually;
- additional ones are not used protective equipment for example a voltage stabilizer.

Common boiler malfunctions and repairs:

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

A lot of soot is formed;

Loud popping noises are heard when the equipment is operating;

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 your boiler equipment, call us, our company’s specialists will come to your location. urgently in order to repair heating boilers of any manufacturer in the shortest possible time. Specialists constantly improve their knowledge and increase their experience by going out to repair heating boilers of any degree of complexity.

AIS company always strives for fruitful cooperation with its clients. Personal approach to each client, discounts, well-executed difficult work, work guarantees.

Wall-mounted gas instantaneous heating systems MORA boilers designed for heating rooms 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.

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

The combustion products in boilers of this type are removed into the chimney or using a fan (“Turbo”)

		Combination boilers				Standard boilers
Boilers with combustion products exhaust	down the chimney
	"turbo" - version C 12

Boiler installation. Commissioning

When installing, commissioning and servicing the boiler, it is necessary to observe certain rules, established by state regulations and requirements of the manufacturer. The user must carefully study the “Operation Manual”, “Warranty Card” and subsequently follow the rules set out in them.

Installation

To install the boiler, as well as for its further safe and economical operation, it is necessary to have a professionally completed project for the entire heating system. The boiler can only be installed by a specialized service organization authorized by the manufacturer. To operate the boiler, only the type of gas indicated on the type plate of the product can be used. An installed and assembled boiler must not be moved to a new location. The boiler must be installed so that the socket for electrical connection of the boiler is located in accessible place. If it is necessary to intervene in the operation of the boiler, be sure to remove the plug from the electrical outlet. The boiler is designed for mounting on a wall made of non-combustible material. There should be no objects made of flammable materials on the boiler itself or at a distance of 100 mm from it.

Main Dimensions

MORA 5118, 5122

MORA 5120, 5121, 5124, 5125

MORA 5119, 5123

Commissioning

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 from an authorized service organization must do the following:

check the tightness of connections

adjust the boiler (if necessary)

check all boiler functions

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

warn the User about the need to comply safe distances from the boiler to walls made of flammable material, and how to protect them

Description of the boiler operation

Heating - with connected room thermostat

The boiler will start working when it receives a signal from the room thermostat about a decrease in temperature in the heated rooms.
After receiving the signal, the pump accelerates and the gas fittings open the flow of gas 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 rooms is reached.
Thus, the process is repeated as long as the boiler is connected to the electrical network.
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 a control and regulation unit in accordance with the heating water temperature set by the User using the control knob on the boiler panel

Heating of domestic water (combined boilers)

Heating of domestic water has priority over heating of heating water.
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 controlled valve changes the direction of movement of the heating water, and it passes through the secondary heat exchanger, and from there back to the pump. The heated heating water in the secondary heat exchanger heats up the service water.
After the end of the selection of warm domestic water, the boiler will automatically switch to the heating process.

Heating of domestic water (standard boilers)

Boilers intended for heating can also be used to heat domestic water in a 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 it is necessary to use a three-way valve with an internal microswitch, and room thermostat- these elements are supplied upon additional request.

Security systems

Safe operation of the boiler is ensured by the following elements:

Heating and utility water flow sensors- will not allow ignition of the main burner if there is insufficient water flow.

Emergency thermostat- closes the gas supply to the boiler if the maximum is exceeded permissible temperature water in the heat exchanger.

Backdraft fuse (boilers with combustion products discharged into the chimney)
If a blockage occurs chimneys(even partial), which will contribute to the entry (leakage) of combustion products into the room, then the backdraft 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 of combustion products "TURBO")
If the combustion product exhaust pipes become clogged (even partially), or fuel combustion deteriorates (it will be lower established norm) under the influence of a decrease in fan speed (voltage drop in the electrical network), or the fan will not work, then thanks to the pressure switch the boiler will not turn on so that combustion products do not accumulate in closed chamber combustion.

The backdraft safety device or pressure switch must be functional during boiler operation and their functions must not be affected by anything (for example, a change in position).
If the backdraft safety device or pressure switch fails repeatedly, contact an authorized service organization to troubleshoot the problem and perform an operational test.

Boiler operation

Control Panel

The control panel in 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 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 light up.

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 functioning, the heating water temperature is set to the maximum value.

"SUMMER-WINTER" mode switch (installed only on combination boilers)
When the switch is set to the "WINTER" position, the boiler is prepared for operation - heating heating water or domestic water.
When the switch is set to the "SUMMER" position, the boiler is only ready 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 heating water leaving the boiler.

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

Preparing the boiler for operation

When preparing the boiler for operation, you must do the following:

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

When putting the boiler into operation, a qualified specialist from an authorized service organization must:

Check the pump mode - it should be set to stage 3.

Start the boiler according to the instructions

Check the pilot burner flame

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

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

Check the function of the boiler switching to reduced power

Perform burner control:
check the main burner, the flame should only be near the outlet openings,
check the stability of the flame along the entire length of the burner plates.

Starting the boiler

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

Boiler ignition sequence

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

After igniting the pilot burner, continue to hold the gas valve button (approximately 5-7 seconds). Then release and make sure stable combustion pilot burner;

turn the gas valve handle into operation 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 working if hot water is drawn off.

Decommissioning of the boiler

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 taps

Short-term

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

leave the power cord plug in the socket

Leave the gas and water supply taps open

Prevention. Maintenance. Safety precautions when operating the boiler

Before starting operation, the User must carefully and thoroughly study the “Operation Manual.”

Any manipulations or operations with the boiler that do not meet the requirements of the “Operation Manual” are unacceptable.

Installation, commissioning, preventive inspections and troubleshooting must be carried out only by trained specialists from a service organization authorized by the manufacturer, which 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 that could change the environment (for example, working 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.