Gas boilers Baxi (Baxi) are an Italian line of high-quality heating equipment designed to create and maintain an optimal temperature in a room at a comfortable level. The equipment of this brand is characterized by environmental safety, low noise level, long service life and low fuel consumption.
In addition, Baxi gas boilers are inexpensive compared to their main competitors. Ease of operation is also considered one of the clear advantages of the devices of the Italian brand. Moreover, Baxi models are able to please the user with high performance.
What else makes this technology so in demand on the European and domestic markets? Its very important advantage is the ability to work with constant pressure drops in the system. Baxi boilers are designed for unstable gas or coolant supply. And since this problem is relevant for most regions of our country, in Russia equipment of the Italian brand is in special demand.
Baxi boilers are universal equipment that can operate on natural and liquefied gas. This allows you to provide heat even in those houses that are located in non-gasified areas. For example, you can install such a boiler in your dacha, being fully confident that you will be comfortable in the house even at very low temperatures outside the window.
Design is also an important advantage of Baxi equipment. Boilers fit perfectly into the living space and are in perfect harmony with almost any stylistic design. The minimalistic appearance and ergonomic design make this equipment very popular.
Design and operating principle
The best option for apartments is a wall-mounted double-circuit boiler. Such models are produced in several series, differing in power, smoke removal system and type of gas burner. For apartments, it is recommended to choose a device with forced exhaust. Calculating the power is simple - divide the square footage of the living space by 10. You will get the required boiler power in kW.
Small boilers of the Main series with a bithermic heat exchanger, to the tubes of which copper plates are spot welded. This increases efficiency. The design includes an expansion tank and a circulation pump. Filtration of incoming water is provided. The heat exchanger is installed on top of the firebox.
The combustion chambers of Baksi boilers are made of metal and covered on the outside with a heat insulator.
The system operates in the same way as all gas boilers. The signal from the thermostat goes to the pump, which creates a vacuum in the return. Water under low pressure (less than 0.45 bar) enters the heating system. Ignition occurs automatically.
The output power increases smoothly with increasing temperature. When it reaches the set value, the operating mode will switch from heating to modulation. When the temperature drops, the thermostat will command the inlet valve to open and the water will be heated again.
If the burner shuts down due to excess power immediately after startup, then restarting is allowed after three minutes.
Baksi device
Hot water supply works like this. Water is supplied through a three-way valve that shuts off the heating main and enters the secondary circuit. There it is heated and supplied to the taps for personal use.
But no matter how problem-free the Baksi is, it also sometimes breaks down.
Causes of malfunctions
Suppose the boiler begins to work intermittently. Don’t despair and immediately run to the service center. You can carry out diagnostics and simple repairs of Baksi boilers yourself. We are not talking about serious damage. Common malfunctions in which it is recommended to try to repair Baksi boilers yourself:
- The burner does not turn on or periodically turns on and off.
- There is no ignition.
- Popping and shaking in the combustion chamber.
- The boiler is heating up too much.
- The water is not warm enough.
- Excessive noise from operating equipment.
- Any sensor is faulty.
The probable causes of such malfunctions are the following:
- Moisture entering the boiler.
- Unsatisfactory quality of coolant.
- Decrease or surges in gas pressure.
- Changes in the 220 volt voltage network.
- Incorrect installation of the heating system.
Restoration of gas heaters
Breakdowns of Baxi gas boilers can occur both due to pressure drops in the supply line and due to improper operation of the equipment. When restoring such equipment, specialists perform hydraulic tests and complete diagnostics, which makes it possible to establish leaks in the gas connection, problems with the automation or malfunctions of the burner.
Gas leakage may occur due to improper installation.
Most often, gas leaks occur, which is explained by unqualified installation of equipment. This leads to problems with the fuel supply, an unpleasant characteristic odor appears in the room, and it is not possible to use the equipment. When repairing Baksi gas boilers, professionals will be able to localize gas leaks using special devices, perform high-quality pressure testing of the supply line, or replace failed components.
There may be problems with the burner , on which soot deposits appear, which increases fuel consumption and reduces the power of the equipment. In this case, the combustion chamber and burner are cleaned using special chemicals, which makes it possible to fully restore the functionality of gas equipment.
In pressure valves, the stem may stick, which leads to low heating of the coolant. A specialist must check the pressure in the supply line and, if necessary, replace the failed valve.
Adjustment of the nominal pressure will also be required in cases where distinct popping sounds are heard from the burner. This happens due to insufficient gas combustion, excessive draft, or a change in the distance from the igniter to the gas supply.
Troubleshooting
If the flame is not powerful due to incorrect operation of the gas valve, the pressure in the system must be adjusted. This must be done in accordance with the requirements of the instructions. The diode bridge often fails. Then what is required is not repair, but complete replacement.
When the boiler turns off immediately after starting, the reason for this deviation is low gas pressure. Repair consists of reducing the pressure by adjustment from the standard 20 to 5 mbar.
"Baksi" fee
If the coolant is not heating well, check the pressure at the outlet of the gas valve. Change the position of the regulator and try to start the boiler again. That's all the repairs.
If there are deviations in the sensor readings, they need to be changed.
When the temperature in the DHW is unsatisfactory, check the functionality of the three-way valve. Wait until the water has cooled completely, then close the heating taps, and then turn the heater back on to hot water supply mode. If the heating starts heating up, the valve is faulty. It needs to be replaced.
When strong pops are heard at the moment of ignition, the reasons for what is happening are as follows:
- Gas supply pressure too low.
- Increased distance from the nozzle to the igniter (due to improper transportation).
In such cases, the gap needs to be adjusted. It should be within 4-5 mm. Open the front panel, unscrew the screw securing the electrode, remove the electrode, bend it a little and put it in place.
When the water temperature drops sharply, the cause is sought in clogged filters. Requires cleaning and sometimes replacement. This occurs as a result of mechanical damage to pipes and radiators that are simply clogged. They are cleaned and replaced if necessary.
Easy do-it-yourself repair of Baksi boilers
Baxi gas boilers are highly efficient. They work even when the gas pressure in the system decreases. However, this equipment, like any other thing, can break. Repairing Baksi boilers with your own hands is only possible if there are obvious and simple reasons. In all other cases, you should contact a specialist.
Where to start - diagnosing the breakdown
Possible malfunctions in equipment operation
When the equipment breaks down and the causes of the malfunction are obvious, you can fix them yourself. If knowledge is not enough or the use of a special tool is required, you should contact a specialist.
What kind of breakdowns happen:
- The burner does not light up or goes out.
- Popping noises are heard from the combustion chamber.
- The equipment is overheating.
- The coolant is not heating up enough.
- The operation of the boiler is accompanied by loud noise.
- Any part stops functioning.
It is necessary to ensure the correct functioning of the equipment
What could cause a breakdown:
- Moisture entering the boiler.
- Bad water.
- A surge or drop in pressure in the gas pipeline.
- Voltage fluctuations.
- Poor quality boiler installation.
The main causes of breakdowns and methods for eliminating them
The equipment may not turn on if the system was installed incorrectly or if air has accumulated in it.
- The burner does not burn very intensely if the pressure in the system is incorrectly set or the gas valve modulator is faulty. Also, such a problem can be caused by disturbances in the operation of the diode bridge.
- The problem can be resolved by correctly configuring the system in accordance with the operating instructions.
- If, after starting the equipment, its operation spontaneously stops, the incoming gas pressure should be reduced to 5 mbar.
- When the coolant does not heat up well, you need to check the pressure and settings on the gas valve.
- If the modulation mode does not function, you need to change the board and valve.
Failure can occur in any of the nodes
Important!
If the sensor shows incorrect values, it should be replaced.
- When the water in the boiler does not heat up well enough, the reason must be sought in the operation of the three-way valve. You can check the serviceability of the valve by turning off the cooled heating system and turning on the device in hot water supply mode.
- If the ignition of the boiler is accompanied by popping noises, you need to adjust the pressure and check the distance from the igniter to the gas supply. Excessive traction can also cause popping.
- That's right, you can adjust the distance between the burner and the igniter by removing the front panel from the boiler. Having removed the damper from the inspection window, you need to unscrew and remove the screw on the igniter, and then carefully bend the electrode. After this, the screw and damper are returned to their place.
- When the water temperature in the circuit drops sharply, you need to check the filters. The pipes may be clogged, frozen, or damaged.
Failure messages are displayed on the device display
Cleaning heating appliances
The first cleaning of the heat exchanger takes place with a special Zhel device. After draining the water from the heating system, you need to connect the pipes of the device to the pipes. Unscrew the cap on the housing and pour cleaning liquid inside. The device should operate for 2 hours, while the handle on the device switches the direction of the washing liquid. Once the cleaning agent has completely drained, you can remove the hoses. Having connected the system and the boiler, you need to fill in water.
Important!
Systematic cleaning of the product will remove scale from parts and prevent breakdowns.
The heating circuit is maintained using a specialized device. It must be connected to the boiler and the process started. The gas tap closes and the water tap opens. Then, the device is turned off for cleaning. This simple system will drive liquid through a short water circuit.
Correct installation and operation of the boiler guarantees its proper operation.
Error codes
It is sometimes impossible to repair Baksi boilers yourself without knowing the fault codes. The devices have a built-in monitoring system that diagnoses failures and displays them on the device display in alphanumeric form.
Baksi control panel
Conventionally, such failures are divided into two groups:
- Leading to a complete stop of the equipment.
- Leading to a transition to standby mode.
If the boiler or one of the functions stops working, try to restart it manually. If no serious damage has occurred, the lock will be removed. It's an electronics failure. If the failure is caused by overheating of the equipment, there is no draft or the cessation of gas flow, then it will not be removed until the factor that caused it disappears.
Codes E01 and E10 appear more often.
The first one is the most common. This is a sign that the flame monitoring sensor is turned on. The following reasons can cause it:
- Stopping the gas supply.
- Incorrect phase distribution (if the model is phase-dependent).
- Failure of the flame sensor itself (it is dirty).
- Failure in the ignition system.
- Gas valve failure.
- There is insufficient air supply.
- Low gas pressure.
First of all, check whether the gas supply valve is turned on, and then the sensor connection. Next you need to press R and hold for three seconds. The error should disappear from the display. An electronics failure has occurred. If this code appears again, you need to contact the service.
The second code appears when there is a malfunction of the sensors that control water circulation and pump operation. Reasons for triggering:
- Low coolant pressure.
- There is no contact between the board and the pressure switch.
- Pressure switch faulty.
- Malfunction of the pump operation sensor.
- Malfunction of the pump itself.
- The heat exchanger is clogged.
Error codes
In these cases, it is better to immediately contact the service center. The exception is pump failure. They change it with their own hands. You can clean the filters yourself. The rest is the prerogative of specialists.
If codes E96, E97, E98 occur, immediately call the service center. These errors are associated with failures of the electronic board, which is not recommended to be repaired by yourself.
In the video you can see the boiler repair:
Do-it-yourself cleaning of heat exchangers
To clean the primary circuit, drain the water from the heater. For these purposes, unscrew the tap on the body (usually located on the right).
Cleaning is carried out using Jelly using special liquids. The device is connected to the boiler through pipes, liquid is poured into it and connected to the network. Cleaning takes two hours, changing the direction of fluid movement manually. After this, the liquid is drained and the boiler is restored to its original state.
The secondary circuit is also cleaned using special liquids. Only in this case the gas tap is turned off and the hot water tap remains open. The cleaning liquid passes in a short circle.
Frequent malfunctions and measures to eliminate them
The burner flame does not reach its maximum power when the boiler is operating.
This gas boiler malfunction may occur due to incorrect pressure settings in the heating system. Also, such a breakdown can occur if the gas valve modulator is faulty. Another reason for its occurrence is the breakdown of the diode bridge.
Remedy: it is necessary to configure the system parameters using the boiler operating instructions.
The boiler starts but immediately stops working
This gas boiler malfunction may occur due to low pressure in the gas pipeline.
Remedy: it is necessary to adjust the gas pressure down to 5 mbar.
Weak heating of the coolant in the heating system
Remedy: Check the pressure at the gas valve. There is a high probability that there was a failure in the min and max values.
Modulation mode does not work
To eliminate the problem, the valve must be replaced.
Temperature sensor values become inaccurate
To resolve this problem, replace the old sensor with a new one.
Weak heating in the hot water supply system
The cause of this malfunction may be incomplete opening of the three-way valve. In some cases, its appearance is associated with a breakdown of such a valve. To accurately establish that the cause of the malfunction lies precisely in the valve , you need to wait some time until the system cools down. Then the shut-off valves of the heating system will need to be closed. When this is done, the boiler should be turned on to hot water supply mode. Confirmation of a valve malfunction will be heating in the heating system.
When the unit is ignited, “popping” noises are heard.
Noise can appear for several reasons:
- Insufficient gas pressure;
- Changed distance from the gas supply to the igniter due to careless transportation of the Baksi boiler.
To eliminate this malfunction, you should adjust the gap size. It should be set within 4–5 mm.
How to adjust the gap between the burner and the igniter
To make the correct adjustment on a Baxi gas boiler, you need to open the front panel and completely remove it from the boiler. After this, it is necessary to remove the damper from the inspection hole of the installation. Behind it you can find an igniter. To change the gap size, unscrew the screw that secures the ignition electrode to the boiler. Next, it is removed, and then carefully bent. Then you need to install it in its original place, and then close the damper.
The coolant temperature in the circuit has dropped sharply
The main cause of this problem is clogged filters. They need to be removed and cleaned. In some cases they may need to be replaced. Damage to radiators or pipes may also be the cause. If these heating systems are frozen or clogged, then repairs are necessary. The area where the defect was found should be cleaned or replaced.
How to clean the primary heat exchanger yourself
The first step is to drain the water from the installation.
To do this, you will need to unscrew the tap on the boiler on the right. If possible, the water must be drained from the heating system. For the cleaning procedure, you should use a device called Jelly. The appliance pipes should be connected to the heating pipes of the Baxi boiler .
Then you need to unscrew the cap on the device, and then pour in a special liquid intended for cleaning. Then the device is connected to the mains. Over the course of several hours, we manually switch the direction of the washing liquid on the device. When two hours have passed, the device must be turned off. Next, turn off the tap to drain the water. Then you need to remove the hoses. But before that, you need to make sure that the liquid flows back into the device . Next, we connect the boiler to the system. After this, it needs to be filled with coolant. After cleaning the boiler, its parts should be cleaned of scale. And this will prevent clogging of the system and its failure.
Do-it-yourself cleaning of the secondary heat exchanger (heating circuit)
In order to clean the secondary heat exchanger, we also use a washing device. It must be connected to the boiler, and then turn on the installation. The gas tap should be turned to the closed position, and the hot water tap should be opened. After this, you need to turn off the cleaning device. Next, the liquid will circulate along a short circuit.
Before installing the boiler, you must consult a specialist. You should also contact him if the boiler requires repairs. Baxi gas equipment, like any other, has its own strength limit, so at some point the boiler will need to be repaired.
