How to check the temperature sensor of the gas boiler

How to install the sensor traction of the gas boiler

There are cases when you need to replace the draught sensor floor gas boiler (or mounted). The process of installing a diaphragm pneumatic relay is simple. It is sufficient to fix the regulator in the selected location and connect it to the gas boiler. It is important to place the regulating element, adhering to the recommendations of experts, in order to properly fix the temperature regime:

Any heating appliances, household, climate control equipment that distort the temperature indicator inside the gas appliance must be located at a distance of 100 cm. It is important to prevent drafts. Installation of the boiler in a cold room is unacceptable.

Note that the sensor must not be too tightly clamped to the appliance housing. The installation is carried out on paronite gaskets, which reduces the heating of the sensor through contact with the housing of the column and allows you to achieve a gap between the hole in the area of the gas duct and the sensor plane.

It is important to make sure that the contacts of the thermostat are firmly fixed to the body. No traces of oxidation are allowed on the device.

  • Once the appliance has been fixed in the chosen location, you should proceed to lay the wire to the heat source, using either concealed or exposed methods. One part of the end of the cable is connected to the contacts, on which the marking COM and NO of the thermostat is displayed. In the wireless versions you can find the terminals in the area of the relay unit.
  • The front panel of the gas equipment must be removed, as it closes access to the control board and connectors. Remove the jumper located between the terminals.
  • To the freed terminals connect the wires that come from the regulator contacts. Compliance with polarity is optional.

Types of gas water heater sensors and how they work

There are many types of sensors, which serve as a system of protection of the gas boiler and have a similar principle of operation, but are responsible for different parts of the boiler. There are 5 main sensors. They are installed mainly in modern models of columns. Not provided in others and are not considered respectable.

Traction sensor

This sensor is installed on the chimney passage to detect presence or reversal of draught. If there is, the gas supply is cut off, the flare goes out and the combustion stops.

check, temperature, sensor, boiler

Traction sensor for the gas heater

Overheat sensor

This sensor is also called water overheat sensor. It is necessary to protect the heat exchanger from overheating and rapid wear. The sensor is equipped with a thermostat that monitors the water temperature.

Sensor of flame and ionization

These protection systems are installed in many modern boilers with an automatic ignition system. If the main burner no longer emits a flame, the sensor gives a signal to stop the gas supply. Sensor can be triggered in three cases:

Water flow sensor

Sensor monitors the water pressure. That is, the wick will burn as long as the faucet is on. Otherwise the system stops gas and water heating. In addition, if the pressure is not enough, for example, you or children do not fully closed the faucet / mixer, the column will not burn for nothing, there will be no gas leakage.

Safety valve to relieve pressure

One of the most important valves. To be installed in the piping system of the water heater. It is needed to prevent the rupture of pipes from a sharp increase in pressure. This occurs due to the fact that the volume increases when heated, but the volume of pipes does not change, so that the excess water has nowhere to go. This is what the safety valve of excess pressure release is for.

Types of detectors in gas heaters and their principle of operation

There are many types of sensors that serve as a protection system for the gas boiler, and have a similar principle of operation, but are responsible for different parts of the boiler. There are 5 main sensors. They are installed mainly in modern models of boilers. Others are not provided and are not considered respectable.

Stimulation sensor

This sensor is installed on the chimney passage to detect the presence of draught or overturning. If it is present, the gas supply is stopped, the flare goes out and the combustion stops.

Traction sensor of the gas water heater

Overheat sensor

Also this sensor is called water overheat control sensor. It is necessary to protect the heat exchanger from overheating and rapid wear. The sensor design includes a thermostat that keeps track of the water temperature.

Flame and ionization sensors

These protection systems are installed in many modern boilers with an automatic ignition system. If the main burner no longer emits a flame, the sensor gives a signal to stop the gas supply. The sensor can be triggered in three cases:

Water flow sensor

Sensor monitors the water pressure. That is, the wick will burn as long as the faucet is on. Otherwise the system cuts off the gas supply and heats the water. In addition, if the pressure is not enough, for example, you or children do not fully close the faucet, the speaker will not burn for nothing, there will not be a gas leak.

Pressure relief valve for pressure relief

One of the most important valves. To be integrated into the tap water system. It is needed to prevent bursting of pipes from a sudden increase in pressure. This occurs due to the fact that the heating volume increases, but the volume of pipes does not change so that the excess water has nowhere to go. This is what a pressure relief valve is for.

Types of sensors

Such sensors are classified according to the boilers in which they are installed, and boilers are classified according to the type of draught they provide.

The sensors in them have the same function and operate on approximately the same principle, although they have different designs.

With natural draught

In gas appliances in which the draught is provided naturally, the combustion chamber is of the open type, and the rate of exhaust of combustion products is controlled by changing the size of the exhaust system.

The controller in such an installation is a highly sensitive bimetallic plate to which a contact wire is connected. If the draught is maintained at a normal level, the plate remains in its original position and the unit continues to operate without interruption.

If the temperature rises and reaches a certain level (specified in the technical documentation), the metal plate due to the special structure of the structure begins to melt and the contact falls off, closing the gas valve. Once the cause of the fault is eliminated, the gas valve returns to its original position.

With forced draught

In installations with forced draft, the combustion chamber is of the closed type, and the exhaust of combustion products is provided by a fan installed at the outlet of the pipe.

In such devices, the controller has a more complex design. It is a sensitive diaphragm paired with a thermostat. The membrane controls the speed of the combustion products output. If it falls below the set value, the membrane stops deforming and the relay opens the contacts, cutting off the gas supply.

Troubleshooting of gas boilers Neva and ways to fix them.: 10 Комментарии и мнения владельцев

the wick burns very bright overnight heats the water pipe when you open the water in a few seconds it comes out with boiling water myin-law’s mother-in-law steams the kids when she washes their hands plastic tubes break how to reduce the wick

Remove the front cover and you will see a yellow bronze screwdriver screw on the reducer.Turn it gently with the wick running.

WHY DOES IT GO OUT WHEN YOU TURN ON THE WATER REGULATOR?

Nikolai, you need a certain water pressure in the water valve to open the gas valve. When the water flow increases, you decrease the pressure and the gas valve closes.

The situation is as follows: when you open the hot water tap, the flame does not turn on for about 4 seconds, and then a loud pop. The ionisation sensor does not work. In the past, when there was no flame for three seconds, the gas supply to the burner stopped. It happens rarely. Neva 4501

Hello Dmitry. Ionization sensor is not responsible. There are several possible reasons: 1. Check the batteries (replace if necessary) 2. Check the spark plug, its location relative to the burner (5 mm clearance) 3. Possible bad draught (gases accumulate and so there is a pop) 4. Clean the burner itself from soot 5. It is unlikely, but nevertheless the control unit itself needs to be replaced.

Hello. Neva boiler. There is a slight leak around the microswitch. What to do?

Check the components of the gas water heater for proper operation

During the operation of any heater some defects may occur. To let the problem go unchecked, it is necessary to deal with the cause of the problem as soon as possible. Otherwise it will lead to even more severe consequences. Therefore, the owners of gas water heaters should know how to check the gas water heater for serviceability.

Scale on the heat exchanger. what to do?

Not all residents of country houses and urban apartments can boast about the quality of tap water. If we make the rating “Faults of the gas water heater”, the first place will be taken by the pollution of the heat exchanger with limescale due to too hard water. Scale is formed when heating water over eighty degrees. Preventive measures can be taken against this phenomenon. For this you just need not to use very hot water. It is no secret that in order to wash, it will be enough to heat the water to 45 degrees. The same temperature is enough for washing the dishes, and given the fact that modern detergents can cope with their task in cold water, even less. The temperature of about sixty degrees is enough to wash your clothes.

COMBI BOILER,TEMPERATURE SENSOR TEST,THERMISTOR TEST

Contributes to the scale and the fact that for convenience, many people do not turn off the ignition of the gas boiler. Because of this the temperature in the heat exchanger can rise to values above the threshold of scale formation. So it is necessary to turn off the ignition if the work of the heater at the moment is not necessary, and turn it on when there is such a need. Also, experts advise not to interfere in the settings of automation in the case of poor water pressure. To solve this problem it is recommended to buy a booster pump.

In cases where preventive actions are no longer relevant, since the breakdown has occurred, in order to perform repair of gas boilers “Neva” (or any foreign brands. not important), it is necessary to clean the heat exchanger. The first thing to do is to make sure that it is a clog. Symptoms are as follows: insufficient pressure of hot water, the unit turns off immediately after turning on or does not turn on at all.

In order to carry out the repair of gas boilers “Neva” or foreign analogues, the following tools will be needed:

  • a set of wrenches;
  • a set of screwdrivers;
  • hose;
  • paranite gaskets;
  • A special abrasive substance “Antikipin”.

First it is necessary to disassemble the column. Then you should close the water supply to the device, open the nearest hot tap. The next step is to remove the supply pipe from the heat exchanger. It is necessary to drain the water from it, about a liter. Next you need to put the tube back on. Using a funnel and it is necessary to pour the cleaning solution, preferably slowly and carefully. “Antiscale” should be left inside the heat exchanger for two hours. There is a little trick: to make the cleaning process faster, you need to heat the solution.

After a while you should resume the water supply and check what pours out of the hose. If traces of limescale and other foreign things will be visible in the liquid, and after the pressure becomes better. everything went well, no. the actions should be repeated.

Causes of triggering of the draft sensor of a gas boiler

There are many reasons that can provoke the triggering of the device. Among the main reasons that lead to the shutdown of the speaker, it is worth noting:

  • The draught is of poor quality. Often the problem occurs against the background of improper installation of the draft structure. Poor extraction of combustion products can cause poisoning of people living in the apartment.
  • Reverse draught, resulting from the formation of an air lock in the chimney area, which does not allow decay products to escape. Quite often the formation of air s is caused by a sudden change in temperature.
  • Debris in the chimney area. Inexperienced homeowners think the chimney isn’t clogged. But that’s not entirely true. Birds looking for a place to build a nest often choose the chimney. When a bird builds a nest, it can fall into the chimney, get stuck there and die. In addition to birds, leaves and deposits of soot on the inner walls of the chimney can cause a clog. When it occurs, the intensity of the draught is reduced. The only solution to the problem is to carry out cleaning.
  • Strong gusts of wind. If the chimney is not properly positioned, the wind gets into it and blows out the burner. Sensor tripping becomes the cause of shutting off the fuel supply.
  • Incorrect installation of the appliance. Incorrectly made the calculation of the dimensions of the chimney often provokes the fading of the burner. It is recommended to measure the chimney height depending on how far the pipes are from the roof ridge. The header must be higher than the ridge at 60-70 cm.

Before proceeding to replace the draught sensor, it is important to familiarize yourself with the device of the gas boiler

How to install a gas boiler draught sensor

There are cases when you need to replace the draught sensor floor gas boiler (or hinged). The process of installing a pneumatic relay with a diaphragm is simple. It is sufficient to fix the regulator in the selected location and connect it to the gas heater. It is important to position the regulating element to properly fix the temperature regime, adhering to the recommendations of experts:

Any heating appliances, household, climate control appliances that distort the temperature reading inside the gas appliance should be 100 cm away. It is important to prevent draughts. The boiler must not be installed in a cold room.

It is worth bearing in mind that the sensor must not be too tightly fixed to the equipment casing. The installation shall be performed on paronite gaskets, that allows reducing the probe heating through the contact with the column casing and achieving the clearance between the opening in the gas flow area and the probe surface.

It is important to make sure that the contacts of the thermostat are firmly fixed to the body. No traces of oxidation on the device are allowed.

  • Once the device has been fixed in the selected location, you should proceed to laying the wire to the heat source, using concealed or exposed methods. Connect one end of the cable to the terminals that bear the COM and NO markings on the thermostat. In the wireless versions you can find the terminals in the area of the relay unit.
  • It is necessary to remove the front panel of the gas appliances as it blocks the access to the control board and connectors. The jumper located between the terminals is removed.
  • To the freed terminals connect the wires that come from the regulator contacts. Observance of polarity is not necessary.
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