Why is the problem of poor pressure of hot water from the gas column and how to solve it?
For stable operation of a gas water heater, a constant pressure of water is required. The column reacts to a reduction in pressure in the supply pipeline and ceases to ignite. At the running boiler, when the pressure falls, water supply is overheated.
Reasons why water does not enter the column, or leaves the water heater with low pressure, several. Most problems can be eliminated independently, or prevent them.
How to fix the problem of poor pressure of hot water from a gas column, we will tell in the article.
The main problems
A modern heating unit operating on natural gas is equipped with a self.diagnosis system. Therefore, in case of any malfunction, the display automatically gives out error code. In special technical documentation, there is a decoding of such messages and recommendations for eliminating faults. However, often events can develop in several directions:
- The information board shows a malfunction code.
- Indication is completely absent and the display does not burn at all.
- There is no ignition.
- The unit stops working in one of the modes.
over, the reasons why the gas boiler is not turned on are divided into two types:
- External. These include. insufficient gas pressure, malfunctions of the smoke.voltage system, interruptions in the supply of electricity, violation of climatic operating standards in the boiler room (temperature, humidity, ventilation).
- Internal. Damage is associated with a malfunction of electronic circuits and individual components. sensors, boards, wiring, pumps, contours, etc.
Internal factors cause the boiler malfunction at least less often than the external source of OOO-KONDITSIONERY.ru
note! With the complete absence of an indication of the boiler, first of all, it is necessary to check the serviceability of the power circuit. The unit should be connected by a separate branch and have its own machine. For one reason or another, it can simply knock it out. Then, after checking, the shield must be translated into the state.
The boiler is not kindled
If the gas boiler does not get scatter, then in most cases the information panel will be an error signal indicating its number or code, by which you can roughly find out in which system of the boiler the malfunction occurred and how critical it is to be critical. All double-circuit boilers provide for switching the operating modes of summer-winter. In summer mode, the boiler will not be turned on for heating the room (the same thing is true when using weather.dependent automation or thermostats).
If the boiler is not kindled and does not make any attempts to turn on (idle) when it may be a malfunction of electronics, but such cases are rare and relate to specific boilers models.
Usually, if there is a malfunction that prevents the standard operation of the boiler, the user will get an error. That is, if the boiler is not incurred, you need to determine the error code and find its value in the equipment operating manual. Error codes with the description are always indicated there.
Next, consider the most common malfunctions of the boilers that users face. It is worth making a reservation that mainly all modern boilers have the same fundamental device and work order. Nevertheless, to solve a specific problem on a particular boiler, you need to at least get acquainted with the instructions for this boiler.
Several unsuccessful ignition attempts
This is the very first error code for most equipment manufacturers. For boilers Baxi E01, for Arison 501 boilers, for Vaillant F28. The rod of the gas-air mixture in the combustion chamber will occur under two conditions: the presence of gas on the nozzle’s nozzles and the presence of a spark. The gas enters the burner through the gas valve, the spark is generated by the transformer on the control board (or remote). A separate case should be noted the situation when the ignition occurs, but the boiler cannot fix the presence of a flame and goes out (closes the gas supply valve).
Fazing error. Often, gas boilers require the polarity of the connection. For an ordinary user, this means that the position of the fork in the outlet matters. In case of violation of the polarity of the connection, the boiler does not see the presence of a flame, the ignition (crackle of the electrode) continues even when the flame is already on the burner, then it turns off in an accident. Even if you did not touch the fork, the polarity could change at the substation!
Electrode of ignition or ionization of flame. Can be separate or combined. The main problems can be associated with the pollution (oxidation) of the electrode or its gap regarding the burner. The dirty electrode of ionization prevents the board from fixing the presence of a flame and the work stops.
High.voltage wire. The high voltage is produced by a transformer and is transmitted through the wire to the electrode, where it pierces the spark of the air gap between the burner and the electrode. If a characteristic crack is heard, but sparks on the burner are visually visible, it is possible that a breakdown occurs somewhere else. For example, there is microcracks in the isolation of a high.voltage wire, and a breakdown occurs at the place of insulation violations on the body.
Electric connection problems. The presence of parasitic potentials on the boiler housing, the absence of grounding or low voltage of the supply network can cause problems with ignition. I often hear the argument: before everything worked without grounding. No one will understand how the boiler worked without grounding. According to the operating instructions, it must be completed! For the normal operation of the boiler, there should be: the network voltage is at least 180 volts, the potential between zero and earthen wire up to 10 volts, the presence of grounding.
Lack of gas on the burner. The gas valve controls the supply of gas to the burner: it opens and performs modulation (gas dosing). Gas valves are regulated and controlled by control board. Accordingly, the cause of the problems may be a valve malfunction (silt the need for adjustment), its electrical part or control circuit on the board. Checking this device must be entrusted to a specialist. The absence of gas can also be connected by external factors: the meter malfunction, filter pollution.
Management payment. In some cases, the absence of ignition or flame control is caused by a malfunction of the main board of the boiler. This can be considered after other possible reasons that are described above are tested.
Addressing Boiler Water Problems Before They Start
Insufficient thrust (the fan does not turn on)
Also a popular problem. If there is a problem with removing combustion products, the boiler will not be launched and ignited until it is completely eliminated. Such malfunctions and their solution are described in more detail in a separate article. chimney errors.
Boiler service to new building regs part L. will gas engineers comply and will customers pay for it.
Insufficient water pressure (reference is required)
Traditional gas boilers work in a closed heating system, respectively, so that the boiler does not turn into a hydrogen bomb inside the heat exchanger should be minimal water pressure (in fact, the presence of water and circulation there). The pressure is controlled by a special sensor. a pressure sensor. For the user in boilers, an additional mechanical pressure gauge is provided. Although the systems and closed, the pressure in them can fall over time (for example, water goes through leaks in the compounds). As soon as the water pressure in the boiler drops below the minimum level (0.fifty.7 bar) the boiler sensor fixes the malfunction and blocks the work. In most cases, you just need to study the testimony of a mechanical pressure gauge and make a system of the system according to the instructions for the boiler.
About connecting a subtract
An ideal place for creating a sub.seating unit is a site with minimal pressure, preferably at the bottom point. The recharge is made on the return, however, so that there is no cold water to the heat generator (this is not very good for the heat exchanger of the working boiler), the reduction valve is slightly removed from the boiler or even placed on the hydraulicular pipe if the heating device is a double.circuit. In order to be able to service/repair the automatic submach supply unit and not turn off the heating for this time, it is tied with the use of bypass and cutting off valves.
Describe your question in the most detail and our expert will answer it
At the sub.tank tank in the photo, the ball is installed at the top maybe below there is a pipe in the tank itself? And why such tanks, if you have with balls at once from below.
Do I need to turn off the boiler at the time of recharge of the closed heating system?
Before starting the heating season, it is necessary to carry out comprehensive maintenance of the heating circuit circuit. Such measures include Washing the system, Checking the work capacity of the equipment. After that, you need to fill out the heating system of a closed type and stir all the air. Methods of filling the circuit several. It is very important to monitor the level of pressure during the work. Optimal values working pressure indicated in the passport of each element contour.
How the boiler works?
For a more clear understanding of the situation, you need to figure out the principle of the boiler. Two.circuit gas wall boilers such as Baxi or Ariston consist of several components. In the gas part, the incoming fuel is burned, the water part ensures the supply of heated water from heat exchangers to the heating system, part of the smoke removal is responsible for the removal of combustion products outside the home.
After the boiler is launched, the pump is turned on, which provides the necessary water level in the system and the valve that supplies the gas opens. The coolant moves in the heat exchanger, which is heated by the flame of the burner. The temperature regime is monitored in the room, temperature sensors control the indications on the supply and reverse pipelines. The pressure indicators of fuel, coolant in the contours, the presence of traction and burning are also removed.
Depending on the user settings, temperature sensors configure the water heating mode. The sensor on the reverse pipeline turns off the boiler, depending on the achievement of the required temperature set for the return. However, the system pump does not stop working until the temperature of the heat exchanger decreases.
This is provided for not to boil water in it. As soon as the coolant cooled to the maximum level, the electronics will send a signal to turn on the pumping of water and the gas valve. The whole process will begin again. When opening a crane in a mixer in a dual.circuit boiler, a flow sensor responds, which informs the electronics about the need to switch a three.way valve to the water heating mode for DHW.
When the hot water crane is turned off, a reverse transition to heating mode occurs. Some manufacturers provide for the heating of both heat exchangers during periodic switching.
The thermostat malfunction
The thermostat is a part that controls when the liquid stops and begins to heat up. It helps to simplify the process of heating water, reduce electricity consumption and prevent the tank break from expansion during overheating.
If the thermostat breaks, this may cause hot water from the water heater does not come. In this case, it is necessary to replace the part.
Prevention and cleaning methods
A clogged cape of heating in a boiler, which needs to be cleaned
Many gas boilers do not warm water, because preventive measures were not taken preliminarily. Heating equipment requires timely maintenance:
It is also important to monitor the correct level of the coolant in the expansion tank.
If the boiler of the baxi does not heat water due to contamination of the elements of the OS, it is necessary to clean. There are several ways:
- Mechanical. It is produced with scale thickness from 1 mm to 3 mm using equipment from a flexible shaft, with a drive and balls.
- Hydrodynamic. Occurs by washing pipes with water under high pressure.
- Chemical. The event uses specialized equipment and the composition of aggressive effects on the surface.
- Electric discharge. The method allows you to remove pollution of increased strength. A working cable with a certain power/frequency of electrical discharge is transported through filled water.
The cleaning method is selected taking into account the type of boiler, the nature of the pollution and the thickness of the scale.
What indicators are considered below the norm?
The indicators from 1.5 to 2.5 bar are considered optimal. Most modern boilers also work at a pressure of 1 bar. But even this indicator is already lower than normal.
The lowest limit at which the equipment will work in normal mode, can be considered indicators in 1.2-1.3 barra. But this is only on a cooled system.
The fact is that when heated, the pressure grows. Therefore, trying to keep the indicators strictly at the mark of 1.5 bar is not worth. But you still need to follow the pressure. If it drops below the norm, the boiler will just stop working.
Problems of solid fuel boilers
Most often, these devices are “pleasing” by the fact that they begin to flow. This difficulty occurs at:
- Overheating, due to which the water boils, and a fistula appears on the heat exchanger. Boilers repair provides for the replacement of the heat exchanger.
- Too low water temperature (less than 60 ° C) in the back line. This leads to the appearance of condensate, which corrodes the heat exchanger. Because of this, a fistula is formed, and the coolant begins to flow. In this case, the leak arises due to the improper organization of the heating system of the house.
In general, most of the problems, including a leak and a fistula, occurs due to improper installation of the unit and errors in organizing a chimney into which the wind easily blows. Such errors also determine the accelerated circulation of antifreeze (this means that its volume does not correspond to the norm of the manufacturer), breakdown of the pump and other binding nodes, falling, or vice versa excessive growth in traction.