Download instructions for using the weller gas boiler. Copper gas wall MARS. Boilers Weller - Errors and their meaning

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Boilers Weller - Errors and their meaning

Wall-mounted double-circuit gas Weller boilers are used for heating systems in rooms up to 230 sq. meters. The modulating burner allows you to achieve the highest heat transfer when operating at any power, which is the main advantage of the design of this brand. The unit has a combustion chamber closed view, as well as additional module condensation, which absorbs heat from exhaust gases.

Management is simple and clear, almost all adjustments are made in automatic mode. wall models Mars connect to standard vertical chimney, and the output of combustion products and air intake from the street occurs by force affordable coaxial chimney.

To maximize the performance of these models, they are equipped with parts and components from well-known companies in Europe. If the automation detects any malfunction, the display shows a symbol with an error code. All models are equipped with separate heat exchangers.

The control unit in the automatic mode controls the required pressure in the pipeline and sets the most favorable working mode, at which the use of gas will be the least. Please read the instructions before use. The error codes that appear on the display can help you detect and fix the problem in a timely manner.

Weller boiler error codes

Error E1– There is insufficient or no water pressure in the circulation system. Hydraulic unit failure, possibly stem sticking. Faulty flow sensor microswitch. In the event of a power outage, it is recommended to restore the water supply. Increase the pressure to 1.2 bar and start heating.

Error E2– Tripping of protection against overheating or incorrect ignition. This mode is set in the device at a water temperature of +96 degrees, or due to problems with the ignition system. It is recommended to check the gas supply. By pressing the "reset" button, reactivate the device.

Error E5– Malfunction of the control board program. To eliminate, by pressing the "reset" key, we restart the unit. If the action is unsuccessful, you should contact the service center.

Error E6– Damage to the heating system sensor. Due to the incorrect performance of the function by the sensor, the unit enters the protective mode. It is recommended to unplug the machine and replace this component. You can also call service department.

Error E7 – Heat coolant. The protection cycle is activated in two cases: when the temperature of the heating system rises sharply to 97 degrees or when the temperature of the hot water supply crosses the border of 81 degrees. It is required to disconnect from the power supply system. If the indicator drops by six degrees less than the recommended one, start by pressing the "reset" key.

Error E9– Faulty domestic hot water sensor. Due to the malfunction of the DHW sensor, the unit enters the protection mode. It is required to de-energize it and replace the hot water supply sensor or contact a service center.

In some cases, when using the unit, it can reduce the temperature by ten or fifteen degrees per heating system and sometimes even turn off. In this case, the device must be connected to the mains by means of a stabilizer, so it is necessary to check it. Since the stabilizer itself can fail, and a malfunction can occur only when a malfunction is detected, the energy consumers connected to it.

The mars 32 gas boiler in DHW mode works intermittently (almost does not work). He has unusual behavior. Turning on the faucet DHW water heats almost to boiling water, despite the fact that the sensor is +40 degrees. After 2-3 minutes, the boiling water turns off, cold water flows. After 2-3 minutes, it turns on and again brings the water temperature to boiling water. And so 4 times. After the last heating to boiling water, it gives out cold water and will no longer turn on. The heating circuit is working normally (did not check for a long time - summer). After I turn off the boiler, and it will stand for about 2 days de-energized and with closed tap water supply, it turns on, and again the same troubles. What needs to be done to change something?

You need to replace the temperature sensor.

I ran into a Weller boiler for repairs. A few seconds after turning it on, it gives an E1 error. Power is not being supplied to the pump. The pump is running, the winding rang, the capacitor. The board does not supply power. Has anyone encountered this issue in their practice?

You need to start with the fact that this model has a double polling of the coolant flow sensor. Before starting the pump, it must be open, after - closed. If any of the conditions is not met - error E1.

Boiler Weller Mars 26. Gives error E02, ignition error. The flame lights up and goes out. With the combustion chamber cover removed, it works normally. As soon as you close the lid, it goes out. The chimney is clean, the fan, pneumatic relay have been changed, gas valve, ignition electrode, ignition unit. Nothing helped. The electrical network is normal. Who can help?

Turbo models should be the opposite. I would venture to suggest that either an overabundance or a large lack of air.

Boiler Weller mars 26. In operation, it cycles strongly. For example, it costs 40 degrees for heating, it turns on, quickly heats up to 38-40 degrees, the burner goes out, the temperature quickly drops to about 32-33, and the burner starts again and so on in a circle. If I increase the temperature, for example, to 48, the unit heats up for a long time (the display shows the same temperature in the region of 49-50 or even drops by a degree). When all the water in the batteries is heated, the burner goes out, and then the temperature slowly drops. The burner turns on, and now it starts to cycle again as well. What thoughts? Poor permeability in the heating system? Does it have a filter? Gas out of adjustment? Is there any way to increase the delta?

Similar to typical fault electronic board when the unit stops modulating the flame and heats up to the maximum.

Boiler mars 26. The boiler does not start. He does not write anything (shows two zeros), does not react to the reset, the display goes out with the power button. The unit is double-circuit, the water circuit is closed with two plugs. Gas is ok. The pressure in the system is 1.5-2 atm. The boiler turned off, because there were problems with the gas supply, the pressure dropped to 0, but it does not give errors. Last time there was a similar situation: the light was turned off for half a day, the pressure dropped, it did not turn on, it gave an error (low pressure). I raised the pressure, but it did not turn on anyway. Twice rumbles and stands. Somehow it happened (I pumped more than 2 atm. pressure and then decided to bleed a little to 1.5), that the next time the electric plug was turned on, the unit immediately began to turn the pump and then turned on. But this time it's not. What could it be?

There was a similar problem. The boiler gave an E6 error, apparently it lacks traction or the exhaust is bad, pulled out the tubes from the sensor to the fan. I stuck one tube on the fan and the piezo clicked. I made a reset, the device was quickly tested, started the fan and lit the burner. I didn’t stick the second tube, I waited two hours until the system and the chimney warmed up well with internal air. Turned it off, then installed all the tubes, as it was, turned it on, and it started up normally.

Please help with the problem: the mars 32 OC boiler does not turn on, it shows error E1 (lack of pressure in the heating system). The pressure is normal, above 1 bar, the pump does not start, a weak click is heard. The red LED on the DHW flow sensor is on, although I do not use the DHW, the outlet is muffled there, and I only feed the unit through the input.

First, look at the DHW flow sensor, clean or replace the bronze screw-in "cartridge". Then look at the heating flow sensor. Most likely, it is filled with water. It is necessary to change the seal and dry the microswitch.

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Gas boilers Weller - Operation, malfunctions and error codes

Weller boiler error codes

Error E5– Malfunction of the control board program. To eliminate, by pressing the "reset" key, we restart the unit. If the action is unsuccessful, you should contact the service center.

Error E7– High coolant temperature. The protection cycle is activated in two cases: when the temperature of the heating system rises sharply to 97 degrees or when the temperature of the hot water supply crosses the border of 81 degrees. It is required to disconnect from the power supply system. If the indicator drops by six degrees less than the recommended one, start by pressing the "reset" key.

In some cases, when using the unit, it can reduce the temperature by ten or fifteen degrees in the heating system, and sometimes even turn off. In this case, the device must be connected to the mains by means of a stabilizer, so it is necessary to check it. Since the stabilizer itself can fail, and a malfunction can occur only when a malfunction is detected, the energy consumers connected to it.

Help for the repair of Weller boilers

For country house I would like to install a Weller Mars wall-mounted gas boiler. Please tell us what is the nominal gas supply pressure /methane / propane / for these models?

In this type of equipment, the nominal gas supply pressure for methane/propane is 20/37 mbar.

We use a boiler of this brand indoors. Up to this evening he had been doing well. Currently, after 5 seconds after the start, the device began to go out. It seems that it cannot deliver water to the system. Explain what is wrong?

Probable cause such a defect may be an ignition electrode that does not see the fire, or a decrease in circulation.

They installed a double-circuit boiler mars 32 OC. When starting, the burner ignites and immediately goes out. I assume there is no ignition spark. Can you help me fix this crash?

It is required to check whether a sound is heard during the formation of an ignition spark, if the wire is removed for ignition. If there is no sound, you must change the ignition transformer. If there is sound, replace the ignition electrode or burner.

I completed the connection of this device at the end of 2016. Presumably after five months there was a failure. I adjust the temperature, but he does not hold it. Explain what could be?

Perhaps the automation fails, and at the moment the temperature rises by 65 degrees, the nozzles turn off. It is necessary to adjust the automation for the correct performance of functions. Another factor may be that an inconsistent power of the unit is selected in relation to the heated area.

The mars 32 gas boiler in DHW mode works intermittently (almost does not work). He has unusual behavior. When the DHW tap is turned on, the water heats up almost to boiling water, despite the fact that the sensor is set to +40 degrees. After 2-3 minutes, the boiling water turns off, cold water flows. After 2-3 minutes, it turns on and again brings the water temperature to boiling water. And so 4 times. After the last heating to boiling water, it gives out cold water and will no longer turn on. The heating circuit is working normally (did not check for a long time - summer). After I turn off the boiler, and it will stand for about 2 days without power and with the water supply tap closed, it turns on, and again the same troubles. What needs to be done to change something?

You need to replace the temperature sensor.

Boiler Weller Mars 26. Gives error E02, ignition error. The flame lights up and goes out. With the combustion chamber cover removed, it works normally. As soon as you close the lid, it goes out. The chimney is clean, the fan, pneumatic relay, gas valve, ignition electrode, ignition unit were changed. Nothing helped. The electrical network is normal. Who can help?

Turbo models should be the opposite. I would venture to suggest that either an overabundance or a large lack of air.

It looks like a typical electronic board malfunction, when the unit stops modulating the flame and heats up to the maximum.

A year ago, this device was connected to the system. Today, at the time of start-up, the wick lights up for 10 seconds, and the main burner does not pick up the fire, and the unit goes out. How can you get out of the situation?

Probably, the automatic ignition is not working or there are problems with the burner. Just in case, check if the phasing has gone astray during the connection to the power supply.

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OPERATION AND REPAIR OF BOILERS

WALL-MOUNTED DOUBLE-CIRCUIT GAS BOILER WITH A CLOSED COMBUSTION CHAMBER
USER GUIDE
WELLER
Mars 26

Content

Construction and designation of parts 3
Inputs/outputs 3
4
Safety notes 5
6
Control Panel Instructions 7
Description of fault codes 7
Unpacking box 8
Packing list 8
Installation illustrations 9
Boiler installation 9
Description of connecting elements 11
Water supply, replenishment and draining 13
Ignition adjustment 14
User operation 14
Security system 16
Maintenance 17
Warranty 18
Warranty card 19

Design and name of parts

1

. Fan

2. Main heat exchanger

3. Control temperature limiter

4. Ignition/flame ionization electrode

5. Burner

6. Flow sensor

7. Gas valve

8. DHW temperature sensor

9. Three way valve

10. Pressure sensor microswitch

three-way valve

11. Heating circuit temperature sensor

12. Fan operation sensor

13. Expansion tank

14. Automatic release valve

1

5. Safety valve

16. Secondary heat exchanger

17. Water pump

18. Water pressure gauge

19. Control panel display board

20. Control panel board

Inputs/outputs

A water outlet for heating

C exit hot water

G gas inlet

F input cold water

R water inlet for heating
Main technical characteristics

Digital display of the temperature of the heating circuit / DHW
Function automatic detection faults and fault code indication
Proportional continuous flame adjustment, the flame is adjusted according to changes in heat input to perform automatic regulation in order to ensure a constant heating/hot water temperature.
In the event of a flame failure, a flame failure protection is triggered, which immediately turns off the gas supply.
The boiler has two independent heat exchangers for heating and hot water.
Temperature limited protection. Prevents damage to the boiler when the temperature rises too high.
With a sharp increase in pressure in the heating system, an automatic bypass valve protects the heat exchanger from overheating.
Protection with safety valve 3 bar (1 bar = 1 kgf / cm 2 = 0.1 MPa), protects the system pipeline from overpressure.
If there is no draft in the chimney, the pressure switch automatically turns off the boiler.
The water pressure switch ensures that the boiler does not start up in the absence of water or its insufficient pressure.
Three minute delay function. It is used to prevent frequent starts of the boiler and increase its service life.
Blocking protection circulation pump: The system automatically turns on the pump once a day for 1 minute.

Security Notes

▲ The boiler is intended only for heating water for heating and DHW systems.

▲ If the boiler does not work, turn off the gas supply and power supply. Contact an authorized service technician.

▲ Power supply required for normal operation boiler - 220～230W/50Hz AC. The manufacturer and seller is not responsible for damage caused by using a different power source.

▲ In frosty weather, the boiler must be supplied with electricity and gas to prevent freezing of water and blocking of pipes.

▲ Check that the water pressure in the heating system is at least 0.5 bar, or add water to the boiler according to the method used.

▲ Check that the type of gas used matches the type of gas indicated on the nameplate of the gas boiler.

▲ If the boiler is not used for a long period of time, turn off the gas supply, turn off the power supply and drain the water from the boiler and pipelines.

▲ Turn off the power supply before cleaning the boiler.

▲ Do not use electrical equipment if you smell gas. Open the window immediately and close the gas valve, and then call a service technician by telephone.

▲ Do not use near gas cylinders, gas and other flammable materials. Do not place combustible materials such as plastic, paper or cloth on the gas boiler.

▲ Do not pull, twist, or cut the power cord.

▲ Do not place foreign objects on the exhaust air outlet or air inlet to avoid clogging or fire.

Main technical specifications

Model		Mars 26	Mars 32	Unit rev.
Rated heat input		26	32	kW
Rated thermal power		24	29,5	kW
Heating system temperature range		30～80	30～80	°C
Operating pressure heating systems		0.5～1.5	0.5～1.5	bar
Maximum pressure of the heating system		3	3	bar
Capacity expansion tank		6	8	l
Set pressure expansion tank		1	1	bar
Hot water temperature control		30～60	30～60	°C
Max pressure tap water		6	6	bar
Minimum pressure tap water		0,2	0,2	bar
△t=25°C, hot water supply possible		13	15	l/min
△t=35°C, possibility of hot water production		9,5	10,7	l/min
Voltage/Frequency		220～230/50	220～230/50	V/Hz
Maximum power consumption		110	150	Tue
Insulation class		I	I
Pipe connection	Connecting water pipes for heating	G3/4	G3/4
	Gas inlet	G3/4	G3/4
	Connecting shower water pipes	G1/2	G1/2
	Air inlet/outlet	60/100	60/100	mm
Rated pressure for natural gas		0,02	0,02	bar
Nominal pressure for LPG		0,03	0,03	bar
Net weight		38,5	39	kg
dimensions: L×W×H		740×410×328	740×410×328	mm

Control Panel Instructions

1	display	Shows temperature and all kinds of codes.
2	Increasing the water temperature for the heating system
3	Reducing the water temperature for the heating system
4	Increasing the DHW temperature	Press once, the set temperature will increase by 1 degree.
5	Decreasing the DHW temperature	Press once, the set temperature value will decrease by 1 degree.
6	Winter/summer switch	Selects the operating mode of the boiler
7	Reset	Locked out automatically, restart the boiler
8	On off	Starting and stopping the boiler
9	Water pressure gauge	Shows the water pressure in the heating system

Description of fault codes

Unpacking the box

The boiler is packed in a rigid box, and cushioning foam is placed in the box to ensure the safety of the product and the absence of damage during transportation. To remove the boiler from the box, proceed according to the following figures:

1. First cut the strapping of the packing box (Fig. 1)

2. Unfold the box as shown in Figure 2.

3. Separately take out the foam and packing tools; do not damage the fixtures (Fig. 3)

4. Take the kettle and remove the bottom foam pad (Fig. 4)

▲ ^ Attention: Do not take the plastic control box by hand when unpacking the stake.
Packing list

Open the box and check the accessories against the following list:

Installation illustrations

Boiler installation

Installation Safety Precautions

Installation, maintenance, installation, repair and instruction of the owner must be carried out by a specialist from the operating organization. gas facilities or a specialist of an organization licensed to this species activities.
Fasten the boiler securely to a wall made of non-combustible material.
Do not place combustible or explosive materials near the boiler.
It is forbidden to install the boiler on other gas appliances.
It is forbidden to install the boiler in the bedroom, living room and basement.
It is forbidden to install the boiler near stairs and emergency exit (minimum distance 5 meters).
There must be no wires above the installation site of the boiler, electrical devices and gas pipes.
The outlet of the boiler must be near the ventilation.
You should use a special socket which must be grounded.
It is necessary to maintain the supply voltage within 220V ~ 230V, for this it is recommended to install a voltage stabilizer.
The boiler is installed in a vertical position.
Install drain tap in the lowest position of the heating system.
Install a filter on the return pipe heating water.
Be sure to flush the pipes or add an anti-scale agent when entering water into the heating system.
Thoroughly flush the entire heating system.
All pipes must be connected tightly to avoid leaks and other undesirable phenomena in the pipeline.
When it is necessary to carry out work on the boiler, do not put foreign objects into it in order to avoid disturbing the normal operation of the boiler.

Mounting plate installation

D

for installation and more convenient Maintenance suspension panel is used. Before installing the boiler, first use hanging panel to determine the mounting position, and then drill two holes at the selected position. Extend the expansion bolt on the wall to secure the panel. Finally, adjust the level and height between the panel and the floor, which must be at least 1.95 m.
^ Drilling holes for the flue
P

After installing the panel, drill holes in the wall for the flue according to the figure. Hole diameter 110 mm, the outlet part of the pipe must have a slope of 3% at least to allow the condensation water to flow out.

^ Suspension of the boiler

Fasten the boiler to the panel and make sure it is securely installed.

(As shown in the picture on the right).
▲ Note: The following must be provided around the boiler

minimum free space.

^ To side surfaces not less than 200 mm;

Before upper surface not less than 450 mm;

To the bottom surface at least 300 mm;

To the front surface at least 500 mm.

^ Gas flue installation
restrictive air ring

When installing any models, whether or not a restrictive air ring is installed, refer to the following table.

When installing a flue maximum length pipes cannot exceed 3 meters. When adding a 135° elbow, the pipe length will be reduced by 0.5 m, when adding a 90° elbow, the pipe length will be reduced by 1 m. Do not install two parts of the 90° elbow (except for the elbow between the flue and the outlet).

Attention:

1. The flue must be sealed. The pipe material must be resistant to deformation, heat and must prevent fire and condensation.

^ 2. The flue connection must be airtight. The sealing material must be resistant to heat and corrosion.

3. The flue should slope 2~3 degrees behind the wall to allow condensation water to flow out.

^ 4. Do not use a material that promotes condensation to fill the space between the pipe and the hole. The pipe should be easy to remove.

5. The pipe must be connected from the outside. It is forbidden to start the boiler without a pipe installed.

6

. See the figure below for the distances between the pipe outlet and the surrounding walls.

mm

Pipe connection

^ Gas pipe connection

A gas valve must be installed at the connection between the flue pipe and the gas inlet.

The flue must be clean. If there are impurities in the gas, a filter should be installed at the gas inlet.

The flue must not be used as an equipment ground line.

1

. heating water inlet

2. hot water outlet

3. cold water inlet

4. circulating heating water

5. gas inlet

Wiring diagram

Water supply, replenishment and draining
Water supply

Fully unscrew the automatic release valve of the faucet.
Open the heating system valve and the outlet valve at the end of the equipment.
Insert the protective plug and turn on the power, then start the boiler (it is forbidden to open the gas switch).
Run the boiler again and again for repeated starts of the circulation pump in order to remove residual air.
The water pressure in the heating system will decrease after the air is released .
Close the boiler and turn off the power.
Close the outlet valve at the end of the heating system equipment.

Replenishment

E If, after the boiler has been operating for some time, the water pressure in the heating system has decreased due to the filling of the pipe system, in order to prevent abnormal operation of the boiler due to low pressure water, water should be added to the boiler when the pressure falls below 0.5 bar.

Make sure the outlet valve on the pump is open.
Turn the handle counterclockwise to open the water supply valve.
Check the pressure on the water pressure gauge on the control panel. When the reading reaches 1-1.2 bar, close the water supply valve by turning it clockwise.
W
water
refill valve
Run the boiler again and again to restart the circulation pump to remove residual air.
D
safety valve reducer
The water pressure in the heating system will decrease after the air has been vented . Repeat steps (3), (4), (5) until the pressure is between 1-1.2 bar.

System dehumidification

Dehumidification of the heating system

Switch off the boiler and disconnect the power supply.
Open the boiler and all valves on the heating system piping.
Open the drain cock and let the water out of the system, then close the drain cock.

Dehumidification of the DHW system

Disconnect the water inlet pipe from the boiler.
Open the heating water pipe valve and let the water out.

Attention:

When draining the system, it is necessary to close the boiler and turn off the power supply.

^ The safety valve drain must be connected directly to drainage system, it is not allowed to install valves in the middle of the connecting pipe.

After draining and supplying water, it is necessary to close the drain valve and the water supply valve.
^ Ignition adjustment

Checks before starting work

Check all heating and hot water connections to make sure there are no water leaks.
Check if the automatic outlet valve of the boiler is open.
Make sure that the heating system pressure is between 1-1.2 bar.
Make sure the gas you are using matches the gas listed on the nameplate.

Adjustment

▲ ^ Attention: (1) Adjustment must be performed by qualified personnel.

(2) If there are problems with heating and water quality caused by the heating system and DHW, please contact the authorized service center.

User operation

in winter

Heating operation

▲ Attention: Heating water outlet temperature can be set within 30~80°C. If you have chosen low temperature floor heating, the adjustment must be carried out by qualified authorized personnel. service center. Heating water outlet temperature can be set within 30~55°C.
^ Switching on DHW heating

After setting the temperature, this setting will be saved automatically. The display will return to showing the current water temperature of the heating system and the boiler will operate in winter heating mode.

Open the tap, the boiler will automatically switch from heating mode to DHW heating mode. When the boiler is in shower water heating mode, close the tap and the boiler will switch from DHW heating to heating mode.

Summer mode (Shower water heating function only)

After setting the temperature, this setting will be saved automatically. The display will return to showing the current water temperature of the heating system, and the boiler will work in summer mode heating
Open the tap, the boiler will turn on and work in DHW mode. Close the tap, the boiler will close and go into standby mode.

▲ ^ Attention: (1) If the unit stops working for a short time, you should check the normal power supply to prevent the fan from stopping.

(2) Make sure that the power supply and gas supply are normal in order to ensure the defrosting function in cold weather.

(3) When stopping the unit for a long time, close the gas pipe valve, turn off the power, and drain the water from the system.

Security system

The boiler uses a protection code display system. If the boiler goes into protection mode, determine the fault according to the following codes:

^ Insufficient water protection

E 1

When the display shows the code shown in the figure on the right, this means that the boiler is entering protection mode due to insufficient water. Turn off the boiler and then turn on the water according to the water supply method described on page 6. When the water pressure reaches 1-1.2 bar, try to turn on the power again and start the boiler.

^ Ignition failure protection or overheating protection

E 2

When the display shows the code shown in the figure on the right, this means that the boiler enters the ignition failure protection mode or the temperature of the heating system water rises quickly and reaches 95°C. Check if gas is supplied and if the gas pipe valve is open. Try to turn on the power again and press the "○" button, then press the "reset" button to ensure that the boiler operates in normal gas supply mode.

^ Heating system sensor failure protection

E 3

due to abnormal operation of the water sensor of the heating system. Turn off the boiler first, and then contact qualified personnel authorized by our company.
DHW sensor fault protection

When the display shows the code shown in the figure on the right, this means that the boiler enters the protection mode and ^

E 4

due to abnormal operation of the G sensor

E 4

Sun. Turn off the boiler first, and then contact qualified personnel authorized by our company.

E 5

program error

When the display shows the code shown in the figure on the right, this means that a software error has occurred. You just need to press the "reset" button or restart the boiler. If the failure of the control board continues, contact qualified personnel authorized by our company.

^ Exhaust system failure protection

When the display shows the code shown in the figure on the right, this means that the boiler enters the protection mode and

E 6

due to abnormal operation of the exhaust system. This is a temporary situation. When the exhaust system is working properly, the boiler will start automatically. If the boiler does not start automatically, contact qualified personnel authorized by our company.
^ overheat protection

E 7

When the display shows the code shown in the figure on the right, this means that the boiler enters the protection mode caused by a rapid increase in the temperature of the heating system to 95 ° C or a rapid increase DHW temperature up to 80°С. When the temperature drops to a value 6°C lower than the set temperature, press the "reset" button to start the boiler.
Maintenance

Check tightness water pipes and replace the O-ring and easily damaged material.
The system pressure must be 1-1.2 bar, otherwise, supply water according to the water supply procedure described on page 6.
Check tightness gas pipes and replace the O-ring and easily damaged material.
Check burner and main heat exchanger. If necessary, clean the nozzles and remove oxides from the burner. Remove deposits from the main heat exchanger to prevent their effect on combustion and thermal efficiency.
Provide pressure for the expansion vessel up to 1 bar.
Check the exhaust pipe for blockage and clean it.
Check the operation of the water pump and fan.

Attention:

(1) When the boiler stops working due to a malfunction, check the water, electricity and gas supply. If everything is in order, but the boiler does not work normally, contact qualified specialists.

(2) In order to avoid accidents, users should not remove the boiler and carry out maintenance on it. We are not responsible for accidents caused by opening the boiler without our permission.

(3) It is forbidden to use this boiler without the permission of a qualified person from an authorized service center.

2017-07-11 Evgeny Fomenko

The device and principle of operation of Weller boilers

Double-circuit hinged gas boilers Weller are designed for space heating up to 240 square meters. The maximum heat transfer, when operating at any power, allows the use of a modulating burner - the main advantage of the design of these boilers. Combustion chamber in appliances closed type, in addition, there is an additional condensing module, which also collects heat from the exhaust gases.

Human participation is not required during control, since all settings are performed automatically. Wall mounted boilers Weller Mars is connected to a classic vertical chimney, and the exhaust of combustion products and the intake fresh air occurs in a forced way through a coaxial chimney.

In order to increase the performance of this brand, all its models are supplied with components from leading European companies - Wilo, SWEP, FUGAS, etc. In the event that the automation of the device detects a malfunction, an appropriate signal is given to the display, where error codes are displayed.

All units are equipped with separate heat exchangers, and the control unit automatically controls the required pressure in the pipeline and sets best option work, at which gas consumption will be minimal. During operation, it is necessary to study any Weller gas boiler. Errors that appear on the screen will help you identify the problem in time and quickly solve it.

Basic error codes

e1

Error e1 - insufficient water pressure or there is no water in circulation system. The valve body is faulty - the stem may jam. Faulty flow sensor microswitch. When the electricity is off, in accordance with the instructions, turn on the water again. Raise the pressure to 1-1.2 bar and turn on the heating.

Boiler hydroblock Weller

e2

Error e2 - protection against overheating or faulty ignition has tripped. The boiler enters this mode at a water temperature of +95 degrees, or due to a faulty ignition. Check gas supply. Press "reset" and start the device again.

e5

Code e5 - software malfunction. Press the "reset" button or restart the device. If this does not help, call a specialist.

e6

Error e6 - the heating system sensor is faulty. The boiler has entered protection mode due to incorrect operation sensor. Switch off the device and replace the corresponding element. If necessary, invite a specialist.

e7

Code e7 - increase in coolant temperature. The protective mode is activated when the system temperature rises quickly to 95 degrees, as well as when the DHW rises to 80 degrees. Disconnect from the power, and when the indicator drops by 6 degrees less than the set value, start it with the "reset" button.

e9

Error e9 - triggered by a malfunction signal from the DHW sensor. Due to abnormal operation of the sensor, the boiler has entered the protection mode. Disconnect power and replace sensor. Or call a specialist.

DHW flow sensor

Other malfunctions

Sometimes during the operation of Weller boilers, the device suddenly starts to drop the temperature in the heating system. 10 or even 20 degrees. It may even turn off completely. At the same time, it is connected to electrical network through the stabilizer.

In such a situation, it is the stabilizer that should be checked. Quite often, such devices fail unnoticed by the eye, and the problem is detected only when a breakdown of the consumers connected to them is detected. It is recommended to use a voltage stabilizer when connecting gas boilers.