Precautions for adding refrigerant to the chiller

First, judge.

The lack of refrigerant can be divided into various manifestations. For example, the compressor discharge temperature and pressure become higher, and the load of the compressor becomes larger. At this time, the noise and vibration amplitude of the compressor will become larger, and there will also be condensation pressure and condensation temperature. The situation is high, and the chiller cannot produce chilled water according to the set water temperature, etc.

In addition, by using various methods such as soap foam or electronic leak detection to detect leaks, it is also possible to determine whether the refrigerant is leaking or missing, and then to determine whether the refrigerant is missing, and whether the refrigerant needs to be refilled, etc.!

Secondly, raise.

Before filling the refrigerant, the chiller must be shut down, which is the most basic.

Refilling refrigerant after shutting down is the basic requirement for refrigerant filling. After confirming that the refrigerant needs to be filled and shutting down, the first thing to do is to determine the amount of refrigerant filling. Generally speaking, it is impossible to directly judge how much refrigerant is actually needed. Therefore, it should be filled and confirmed at the same time. Generally, when the filling reaches about 80% of the nominal volume, the filling should be stopped, and the filling volume should be determined according to the weighing before and after the filling of the refrigerant tank.

Vacuuming is the first thing to do, otherwise it may cause undesirable consequences and affect the entire chiller. It is best to weigh the tank in advance, and then you can know how much refrigerant has been filled. Remember that the refrigerant is in the tank. When filling, it is in a liquid state, and once the benefit tank is outside, it will be in a gas state. Since it is a gas state, when filling, you should fill in the gas at the low pressure suction end of the compressor, and connect the pipeline When connecting, start the compressor again. There are also liquid refills, but it is more complicated and the accuracy of the amount of refrigerant is not high. If a small amount of refrigerant is added, it is not recommended.

In addition, it is not recommended to charge too much refrigerant at one time to avoid excessive refrigerant pressure, pipeline damage or other accidents!