Wall hung boiler The pressure rises Bosch wall hung boiler! Underfloor heating system. 10

The heat exchanger is leaking and needs to be replaced, and it has not been repaired. Originally, life and heating were two systems, but now the domestic water coil has trachoma or weld cracks and automatically adds water to the heating system! That's why the pressure is high!

Hello, there is a pressure expansion tank in the Bosch wall-hung boiler, which is filled with nitrogen, which can stabilize the pressure of the system, you are still like this when the system has been turned off to replenish the water, it should be that the gas of the expansion tank has run away, please contact the maintenance department and use the gas cylinder to press the expansion tank.

Leakage in the heat exchanger or plate heat exchanger (i.e. collusion between the heating and sanitary water systems).

If it's not a problem with the make-up valve, it's a problem with the upper make-up valve in the furnace.

The heating system is isolated from the outside world in normal working condition.

You can directly close the main valves of the heating water supply and return water under the boiler (the 20 tubes on the far left and right directly below the boiler) to see if the pressure continues to rise.

Second, you can close the main valve of the tap water and observe whether the pressure continues to rise.

What is the specific model of boiler, and does it have a water tank?

1. The system is blocked.

2. The water temperature is too high.

3. There is no pressure water tank installed.

Has the landlord problem been solved? Why, exactly? I also have this problem with my wall-hung stove.

Dear, this question can't be asked. Three months, still in the warranty period, contact Bosch after-sales service, on-site free maintenance. You can't motivate the child, or the after-sales department will be responsible. I guess that's the best answer. Don't disassemble the machine yourself.

BoschWall-hung boilerThere are two types of models.

There are two main types of wall-hung boilers: instantaneous type and volumetric type, and the instantaneous type type is divided into two types: casing type and plate replacement type, which are divided from the heating mode of domestic hot water, such as Vaillant.

It's a plate changer, while Bosch has both. There is a big difference between the two models, so it is best to decide to choose the model and then the brand when buying a wall-hung boiler.

Principle of heat exchange: casing heat exchanger is a tube-in-tube heat exchanger, the domestic hot water casing is nested in the main heat exchanger, the priority operation of domestic hot water is controlled by the start and stop of the pump, when the domestic hot water is running, the pump stops working, and the domestic hot water in the casing is heated by a high-temperature water in the main heat exchanger.

The plate exchange type is to heat the domestic hot water through a plate heat exchanger, and the priority operation of the domestic hot water is completed by the electric three-way valve, when there is a demand for domestic hot water, the electric three-way valve will introduce the primary high-temperature water in the main heat exchanger into the plate to heat the domestic hot water.

Technology comparison

1. The comfort of domestic hot water In the process of using domestic hot water, when the user temporarily turns off the production hot water and opens it in a short time, because the water in the main heater does not flow, the waste heat of the main heat exchanger and the domestic hot water at a high temperature will continue to heat the domestic hot water in the casing, and there will be a period of high temperature water when the domestic hot water is turned on, causing the domestic hot water to be hot and cold, and even scalded.

User. The plate-swap heat exchange form can completely avoid this problem, and the use of domestic hot water is safe and comfortable.

2. ScalingWhen the heating is running, the domestic hot water in the casing will be continuously heated by a high temperature water, resulting in high temperature scalingWhen the domestic hot water is used or temporarily shut down, because the water in the main heater does not flow, the waste heat of the main heat exchanger and the primary high-temperature water will continue to heat the domestic hot water in the casing, which will also cause high-temperature scaling.

With the increase of use time, the scale will become thicker and thicker, affecting the efficiency of wall-hung boilers, especially in areas with hard water quality, and there is often a blockage phenomenon. Due to the use of secondary plate heat exchange, the primary side is a closed system, and the water temperature on the domestic hot water side is generally limited to below 60 (the actual water temperature is below 50), and it is not easy to scale below 60.

3. Service lifeWhen the domestic hot water is used or temporarily closed, the waste heat of the main heat exchanger cannot be taken away in time because the water in the main heater does not flow, resulting in local high temperature and affecting the service life. Plate exchange heat exchange form: When the domestic hot water is over, the pump will run for a period of time, which can effectively avoid local high temperature.

The standard water pressure in the wall-hung boiler will not affect the normal use of the wall-hung boiler, and there is no need to replenish water. If the water pressure is low, it may cause the domestic hot water to heat up and cold or not start properly.

If the water pressure is higher than 2 bar, the system pressure will increase with the temperature during heating. If it exceeds 3 bar, the safety valve under the gas wall-hung boiler will automatically drain water, causing unnecessary losses.

If this happens, you can first check whether there is a leakage area in the radiator or floor heatingThen, if the heating equipment is connected to central heating, whether the valve is closed;Finally, check whether the water pressure gauge is damaged and whether the expansion tank is damaged.

How to replenish water in Bosch wall-hung boiler?

1.When replenishing the wall-hung boiler, simply open the water supply valve. In the process of water replenishment, it is necessary to pay attention to observe whether the water pressure gauge of the wall-hung boiler reaches the normal range.

Generally speaking, no matter what brand of wall-hung boiler, its pressure value will be between 1, if it is higher or lower than 1bar, it is abnormal, and it needs to be replenished in time.

2.Open the exhaust valve before filling the water, rotate the make-up valve counterclockwise, and then inject water into the pipe. When reached, stop filling water and close the valve.

3.After that, turn on the wall-hung boiler and see if it can run normally.

Reasons and solutions for Bosch wall-hung boilers that are always short of water:

1. Insufficient moisture in the furnace. The main manifestation is that the water level in the furnace has been cut below the whole line of Anchunchen, and the alarm sound is emitted. This should stop the boiler first, then turn off the alarm, and then add water to the boiler above the water level to restart the boiler.

2.The temperature of the flue gas discharged from the furnace rises high, which should be caused by the rupture of the pipe and the lack of water, so the best solution is to quickly repair the pipe of the electric wall-hung boiler, or replace it with a new pipe.

3.There was a popping sound, and steam was emitting from the furnace door. At this time, it means that the lack of water in the furnace is already very serious, and the water should be replenished immediately, otherwise it may be dangerous.

By the time the issue was resolved again, it was already a bit late. The best thing to do is to prevent it before it happens. Therefore, it is necessary to check the water level of the boiler from time to time to ensure that the water level is always above the water line, so as to avoid such problems.

There are European fashions, European elites, European stars, and European aristocrats.

1. European fashion.

Bosch has created a boiler for small and medium-sized houses and apartments, which is European-style and powerful, easy to operate, and equipped with comprehensive protection devices to ensure safe use.

2. Eurostar.

Features such as high comfort, monitor operation, hot water comfort, new exterior design, etc.

3. Bosch aristocracy.

Design concept, energy saving and environmental protection, ultra-quiet operation, flexible temperature control and other characteristics.

4. European elites.

Simple and fashionable shape, flexible installation; Long service life; Low energy consumption and energy saving effect is remarkable; It is not easy to scale and has the characteristics of low noise.

The overall characteristics of Bosch wall-hung boiler:

Bosch wall-hung boiler has high efficiency; Low emission, environmental protection; Controller with time programming, flexible and convenient; Microcomputer control, LED display; Low energy consumption and energy saving effect is remarkable; Multiple safety protection functions, reliable operation; Indoor temperature control remote sensing technology, which can realize remote control; The control system is modular.

Honors: Bosch Thermotechnology participated in the 2011 Fashion Home Furnishing Awards Gala hosted by Trends Interpretation magazine, and its subordinate product, Bosch European Noble Gas Heating Water Heater, won the annual Fashion Home Green Home Award for its environmental protection, innovation, comfort and energy saving.

The normal operating pressure of the heating system is around and around, and the pressure gauge pointer is in the green range. Less than 1bar will cause the wall-hung boiler to work abnormally, please fill the water through the water replenishment valve to the normal range in time, and then completely close the water injection valve.

The first floor is purely a trust. Don't buy Bosch stoves, the quality is poor, and the domestic water experience is far inferior to the general domestic gas water heater.

Bosch wall-hung boiler is not an original boiler imported from Germany, but an OEM produced in Europe.