Core reminder: F2159 PEX Crimp Fitting is one of the ways of heating in winter. The entire floor heating system is composed of a variety of equipment. Floor heating has always been a problem that users are very concerned about. This is not only related to the safety of their own home, but also related to the neighborhood harmonious. However, as the floor heating system technology becomes more and more mature, the materials used are getting better and better, and the floor heating leaks.

 The floor heating system is one of the ways of heating in winter. The entire floor heating system is composed of a variety of equipment. The floor heating has always been a problem that users are very concerned about. This is not only related to the safety of their own homes, but also related to the harmony of the neighborhood. However, as the floor heating system technology becomes more and more mature, the materials used are getting better and better, and the problem of floor heating leakage is less and less. However, there is also a problem of water leakage in floor heating. How do we determine the occurrence of floor heating leakage?

The problem of water leakage in floor heating mainly exists in two aspects: when installing floor heating and when using floor heating.

When installing floor heating

Our floor heating pipes are installed below the ground, from the location of the wall-hung boiler to the location of the manifold. This section of the pipe is the main pipe of the heating system. Due to the convenience and aesthetics of the construction on the ground, the supervisor will leave some The joints and joint positions are where there are hidden dangers of water leakage. The floor heating main pipe is made of PPR pipe and PE-X pipe. The connection methods of the two pipes are different. The PPR pipe uses hot melt connection. According to the craftsmanship of the installation master, there is a problem with water leakage. The hidden danger of PE-X pipes is that the PE-X pipes are connected by the ferrule type, which is connected by the shrinkage characteristics of the pipes. It is completely dependent on the characteristics of the pipes themselves. As long as the better materials are used, the probability of water leakage will be relatively low.

Due to the limitation of pipe diameter and heat dissipation of indoor floor heating coils, each set of loop pipes cannot exceed 120 meters, and there are no joints below the ground. As long as external force does not damage (nails, gravity extrusion), it is difficult There is a risk of water leakage.

The whole system of floor heating will have many joint positions. Water leakage is more likely to occur at the connection of the main pipe and the interface of the manifold. However, after the floor heating coil is constructed, a pressure gauge will be installed for water injection pressure test. And this pressure has been maintained until the wall-hung boiler is installed. The initial pressure of the entire floor heating coil is set at 0.6MPa, the pressure test time is 48 hours, and the water pressure drops within the normal range, and the floor heating cement mortar backfill can be carried out. This pressure needs to be maintained Until the wall-hung boiler is installed, of course, the pressure in it has dropped to a certain extent. The reason is that there is some air in the water of the whole floor heating pipeline, and part of the air will evaporate. Therefore, the pressure holding pressure gauge set during the installation of the floor heating is used to determine whether the floor heating is leaking. Important reference, this is convenient for our usual inspections, and we can deal with it in time if there is an abnormality.

 
When using floor heating

When we install the wall-hung boiler, it indicates that the floor heating can be used normally. At this time, the pressure gauge installed in the initial stage will be removed and replaced by the pressure gauge on the wall-hung boiler. At this time, the pressure of the floor heating no longer needs 0.6MPa. At such a high level, the operating pressure of the floor heating is maintained between 0.1-0.25MPa, and this pressure will be maintained in this range during debugging. When the floor heating is used, the water pressure will rise a little due to thermal expansion and contraction, as long as it does not exceed the warning position , The wall-hung boiler will not automatically release the pressure. When using floor heating, the wall-hung boiler will prompt to replenish water when the water pressure is lower than 0.1MPa. When it is lower than 0.06MPa, the wall-hung boiler will forcibly stop working to prevent dry burning, damage to the equipment or appear Dangerous situation.

The most likely location for water leakage when using floor heating is the location of the connector (excluding human damage to the pipe). The location of the connector may be the interface between the floor heating manifold and the wall-hung boiler, but water leakage may also occur inside the wall-hung boiler. There are also many interfaces in the water part of the water pump, such as the connection of the water pump, the pressure relief valve, the water supply valve, the plate changer, etc. Of course, when the floor heating is used to determine the floor heating leakage is checked by the wall-hung boiler pressure gauge, and the wall-hung boiler lacks water One of the reference factors for fault alarm.

What was wrongly judged as a water leak?

When the floor heating system has a water leakage problem, it needs to be repaired in time, otherwise it will cause greater losses, but there will also be misjudged water leakage during the installation and use process, which needs to be confirmed by troubleshooting. There are several situations:

Loose joints of floor heating during installation

During the underfloor heating installation, we will perform underfloor heating pressure irrigation to maintain pressure. At this time, the underfloor heating manifold has been connected to the underfloor heating coil. A pressure gauge will be installed at the manifold or the main pipe joint to maintain the pressure. If the joint is not connected enough If the joints leak water, the floor heating water will slowly drain during the decoration period, which will eventually cause the pressure gauge to drop and cause the misjudgment of water leakage. At this time, it is necessary to check all the joints of the floor heating to check whether there are nails in the floor heating pipes, and then give Replenish the floor heating and suppress it. Observe for 24 hours. If the floor heating water pressure is normal, the floor heating will not leak.

The boiler pressure gauge is damaged during use

After the wall-hung boiler is installed, the pressure gauge (liquid crystal pressure index) on the wall-hung boiler is used as an important reference for judging the floor heating leakage. If the wall-hung boiler is working normally, the indoor heating temperature is also normal, but the pressure gauge of the wall-hung boiler drops to the normal range In addition, this shows that there may be a problem with the floor heating pressure gauge, which requires the wall-hung boiler company to investigate. This also shows that the floor heating system does not leak. The inaccurate pressure gauge pointer is a false alarm of the floor heating leakage.

Floor heating normal exhaust

We know that the floor heating system is full of water, but the water entering the floor heating pipe contains a lot of air. With the circulation of the floor heating hot water, the air will be discharged out of the floor heating system when it flows through the position of the exhaust valve. Therefore, We will find that the water pressure of the newly-injected floor heating drops significantly in the early stage of use, but the water pressure will not drop outside the normal range, but this will also make many new floor heating users mistakenly believe that the floor heating is leaking.

Through analysis, PEX Fittings Wholesale mainly relies on the pressure gauge to determine the leakage of the floor heating. During the installation and construction of the floor heating, it relies on the pressure gauge to test the pressure, and during the use of the floor heating, it relies on the wall-hung boiler pressure gauge. However, the reasons for being falsely reported as floor heating water leakage include loosening of floor heating pipe joints during installation, pressure damage of wall-hung boilers during use, and normal use of floor heating exhaust. Therefore, we need to pay enough attention to the leakage of floor heating, and need to be inspected by the responsible installation company and observed by the user, so as to find out and deal with it in time.