In detail: do-it-yourself rinnai boiler repair from a real master for the site my.housecope.com.
Disassembly sequence When assembling, use a properly sized O-ring and lubricated (neutral detergent). The only thing is, do not use detergent in places where it comes into contact with gas. This can cause gas leakage due to leakage. Never touch electrical parts with wet hands. This could result in an electric shock. When disassembling the hot water unit, it is possible to get scalded by hot water. Disassemble after draining the water.
Carefully When draining the water and disassembling the water supply unit, be sure to close the inlet water valve, open the hot water valve to release the water pressure, then disassemble Do not touch any parts of the control box with your hands. Electrostatic discharge can damage the parts. - Close the central gas valve. - Remove the plug from the socket. -Close the inlet water valve, open the hot water valve
(1) Remove the front cover (remove the two screws)
(2) Dismantling the control box 1) Remove the front cover 2) Disconnect the wires connecting the control unit 3) Unscrew the assembly screws (3 pcs)
(3) Dismantling the fan 1) Remove the front cover 2) Disconnect the fan motor wires 3) Unscrew the assembly screws of the fan motor (3 pcs)
After removing the fan motor
(4) Dismantling the igniter 1) Remove the front cover 2) Disconnect the high voltage wire of the igniter 3) Remove the igniter connectors (2pcs) 4) Unscrew the assembly screws (1pc)
Video (click to play).
(5) Dismantling the manifold 1) Remove the front cover 2) Disconnect the igniter (4) 3) Remove the assembly screws (6pcs) 4) Remove the proportional valve screws (3 pcs)
Take care not to damage the gasket. If the gasket is damaged, replace it with a new one.
(4) Disassembly of the proportional valve 1) Remove the control box see point- (2) 2) Remove the manifold item - (5) 3) Disconnect the gas valve connectors (4pcs) 4) Unscrew the retainer screw (1pc) 5) Remove the gas supply pipe and connecting valve (1pc)
Connection valve Gas valve
Warning Make sure the O-ring is not damaged or foreign particles adhere. A damaged O-ring can cause gas leakage.
(7) Disassembly of the transformer 1) Remove the control box see point (2) 2) Remove the transformer connectors (1pc) 3) Unscrew the fixing screws of the transformer (3 pcs)
(8) Dismantling the heat exchanger Carefully 1) Remove the igniter see point- (4) 2) Remove the manifold see paragraph- (6) 3) Remove the exhaust flange screws (3 pcs)
4) Removing the exhaust flange fixing screws (3 pcs)
5) Unscrew the fastening screws of the heat exchanger (top 2 pcs, bottom 3 pcs)
6) Inlet water pipe and outlet water pipe Remove the screws, remove the flange (1 pc each) Remove the clamps (2 pcs) from the return pipe, then remove the adapter 7) Remove the return pipe
8) Remove 2 clips from the inlet pipe, disconnect the adapter 9) Separate the inlet pipe
10) Grasp the top of the heat exchanger with one hand and the fan with the other and detach the casing
Observe the following precautions when reconnecting the inlet and return pipes.
When assembling the adapter, the arrow must point to the left.
Assemble in reverse order from disassembly.
Carefully When assembling, use a properly sized O-ring and lubricated (neutral detergent).The only thing is, do not use detergent in places where it comes into contact with gas. This can cause gas leakage due to leakage. • Be sure to install a flue of the appropriate standard. • If the pipe diameters do not match, the exhaust gas may leak and there is a danger of poisoning due to carbon monoxide (CO). • Do not connect the chimney of the FF type water heater to existing chimneys or general ventilation. This can cause incomplete combustion.
Modern gas boilers are quite sophisticated technological equipment. With proper care and proper handling, the gas boiler will serve for a long time without any interruptions. However, even the most expensive and functional equipment has its own resource, after the exhaustion of which all sorts of malfunctions begin to appear.
DIY gas boiler repair
Knowing the main causes of malfunctions and the procedure for eliminating them, you can repair your gas boiler with your own hands. This is a very painstaking, responsible, but in most cases relatively easy job.
Contents of step-by-step instructions:
First of all, it is necessary to establish why any malfunctions may occur in the operation of gas heating boilers. A number of different factors can lead to problems.
Modern gas boilers are equipped with various automation equipment. These funds, in turn, are powered by electricity. And, despite the fact that the 21st century is already in the yard and systems for the use of alternative energy sources are being actively developed around the world, the problem of stability of power grids remains relevant for many regions, especially for remote villages and all kinds of summer cottages.
A sudden power outage or a strong surge in electricity is one of the main enemies of any modern gas boiler.
To avoid all the accompanying troubles, buy a quality stabilizer in advance. Do not spare money to buy this device - there is little sense from cheap models, so it is better to immediately allocate funds to purchase a good stabilizer from a well-known manufacturer. Be sure that in the event of a breakdown of the automation, you will spend much more money on its repair and replacement.
At home, wall-mounted models of gas boilers are often used. Such devices are simultaneously responsible for both space heating and hot water preparation.
The design of wall-hung boilers includes a flow-through heat exchanger. Low-quality hard water with various impurities is the main enemy of the heat exchanger of a gas boiler. At the same time, under the influence of low-quality water, the heat exchanger can fail in just one season.
Install special filters to prevent such damage. The best option is a complete water purification system. With it, your boiler will work as long as possible, and using purified water is much safer for health.
Any knowledgeable person will tell you: only qualified specialists should be engaged in the installation and piping of gas heating equipment.
Even the slightest mistakes at the stages of installation and connection of equipment can lead to irreversible consequences. For example, an incorrectly executed piping in the case of a cast-iron gas boiler more powerful than 50 kW will lead to the fact that the unit will simply split at low temperatures.
If you are not an experienced gas operator, entrust the boiler installation to professionals.
Therefore, if you are not an experienced gas operator, entrust the installation of the boiler to professionals - this way you will save yourself from many problems in the future.
Unfavorable weather conditions can also lead to the appearance of many different problems. In frosty winters, people turn on the heating at almost full capacity. This leads to a significant decrease in pressure in the gas pipeline system.As a result, boilers cannot fully realize their potential.
You will not be able to solve this problem on your own - you still cannot explain to your neighbors that by their actions they only aggravate the situation. As a solution to the problem, you can install an additional boiler that runs on a different fuel.
Automatic solid fuel coal-fired boiler with hopper
A modern gas boiler is a complex and potentially dangerous system. The main danger of such units is the risk of a gas explosion in the event of improper handling of the equipment or untimely elimination of various malfunctions.
Various kinds of automation are responsible for maintaining the operation of the gas boiler at an optimal level. An inexperienced user is often unable to understand its device. Therefore, it is better to immediately invite specialists to troubleshoot serious problems.
On your own, you can try to eliminate only visible damage and various contaminants that have led to the failure of the pipe, chimney and other parts of the boiler.
Typical malfunctions of gas boilers
There are a number of typical problems that you can fix yourself in most cases. Problems will also be listed, in the event of which you can only protect yourself before the arrival of a specialist.
If a distinct smell of gas or smoke appears in the room, immediately turn off the boiler and leave the room, opening it for ventilation.
Gas boiler functionality diagram
Call a professional immediately. Trying to solve the gas leak problem on your own without the necessary skills is extremely dangerous and unreasonable.
If the flame sensor or the gas supply pipe breaks down, turn off the boiler, close all gas valves and let the unit cool down completely.
Return to the area after a while to check for the smell of gas. If everything is in order with the draft, try to turn on the boiler again. If there is no thrust, immediately call a repairman.
Overheating is one of the most common problems in modern gas boilers. The reason for this may be a malfunction of the automation equipment or a clogged heat exchanger.
It is impossible to cope with the repair of automation without the appropriate knowledge.
You can also clean the heat exchanger with your own hands. The most common materials for the manufacture of heat exchangers are copper and stainless steel. There is usually no problem cleaning them, but be extremely careful anyway.
Primary heat exchanger for wall mounted gas boiler Beretta
According to the recommendations of the manufacturers, the heat exchangers must be cleaned of soot every few years (each manufacturer indicates a specific interval in the instructions for their equipment).
Primary heat exchanger (heating circuit) of the gas boiler Rinnai SMF
To clean the heat exchanger, simply remove it and clean it thoroughly with a metal brush. In the case of a copper heat exchanger, it is best to replace the brush with a metal sponge used for washing dishes.
The problematic place of fans is their bearings. If the fan of your boiler stops developing the set number of revolutions, try to eliminate the problem as soon as possible.
Fan (3311806000) for Daewoo gas boiler
To do this, remove the back of the fan, take out the stator and lubricate the bearings. Machine oil is fine for lubrication, but it is best to use a higher quality carbon compound with heat-resistant properties if possible.
Fan RLA97 (Aa10020004) for gas boiler Electrolux
Also, an interturn short circuit can lead to problems with the fan. Only a specialist can cope with the elimination of this malfunction. Return the stator for repair to replace the winding, or immediately replace the faulty unit with a new device.
Gas boiler chimney diagram
Often, excessive clogging of the coaxial chimney leads to the appearance of various malfunctions in the operation of a gas heating boiler.
Remove the chimney and thoroughly clean all of its components from soot. So you will not only return the previous level of efficiency of the unit, but also significantly increase the efficiency of the boiler.
The boiler can shut down spontaneously for several reasons. This usually happens due to a malfunction of the combustion sensor. This problem, in turn, most often leads to contamination of the gas pipe.
Draft sensor 87 ° C for Thermona boiler
Remove the branch pipe, rinse it thoroughly with water, clean it with a cotton swab and blow it off the remaining moisture. Put the pipe back in place and try to turn on the boiler. If it doesn't help, call the wizard.
No wonder they say: the best repair is prevention. Gas boilers require annual preventive maintenance, which must be carried out before the start of the heating season.
Whenever possible, maintenance should be carried out twice a year, before and after the heating season.
Check all the previously discussed boiler elements for their serviceability. Follow the preventive maintenance recommendations given by the manufacturer in the instructions specific to your boiler. Eliminate any malfunctions that arise in time, if possible.
Remember! A gas boiler is a potentially hazardous equipment. Incorrect use and untimely troubleshooting can lead to irreparable consequences. Therefore, be careful and do not engage in any repair work if you doubt your ability and correctness of action. Otherwise, follow the instructions provided.
Any gas equipment (including boilers) belongs to high-risk household appliances. The mixture of natural gas and air is extremely explosive. Therefore, the repair of gas boilers with their own hands can only be carried out by a specialist who has experience of this kind of work and is well acquainted with the design features of modern heating boilers. At the same time, timely diagnostics of possible malfunctions of such equipment makes it possible to facilitate the task of the gas service specialists called for urgent repairs, and extends the period of reliable operation of the boiler itself.
poor ventilation of the room;
unsatisfactory traction.
Unlit natural gas can be sucked into the room from under the upper housing cover. An explosion can also occur as a result of a gradual increase in concentration.
