The four-way valve of the chilled water machine needs to be replaced in time after a long period of use, so how to replace it? You can look at the suggestions.

When replacing the chilled water machine, you need to remove the connecting pipe connecting the compressor exhaust pipe and the suction pipe first. Because the pipes connecting the condenser and the three-way valve on the four-way room of the refrigerator are relatively close, it is not easy to get from the pipe port. Take it out, so the pipe connecting the compressor discharge pipe and suction pipe should be removed first.

Next, remove the connecting pipe connecting the three-way valve and the condenser, and use the torch of the chilled water machine to heat the four-way valve at the same time to connect the three-way valve and the condenser pipe interface. When the two nozzles are red and the solder starts to flow Use pliers to clamp the pipe connecting the four-way valve to the compressor exhaust pipe and lift it up. When the two pipe ports reach a certain temperature and the connecting pipe is loosened, the four-way valve can be removed.

The chiller needs to pay attention to the high temperature when welding the four-way valve nozzle, which will easily damage the plastic valve block in the valve body. Therefore, the valve body should be wrapped with a towel to cool down, and the temperature of the valve body is transmitted through the 3 pipes at the root. The 3 pipes at the root should be wrapped first. Since the pipe connecting the compressor exhaust pipe is far from the valve body of the four-way valve, the temperature will not damage the internal valve block during welding, so there is no need to wrap the nozzle with a towel.

When installing the four-way valve body, you can use a welding torch to heat the nozzles of the 3 pipes at the root of the four-way, so that the remaining solder on the surface is fully melted and flows until it falls off, so that the surface of the nozzle is smooth, so that it can be inserted into the four-way smoothly. Valve nozzle. Because the difficulty of welding lies in the three pipes at the root, the pipe connecting the compressor exhaust pipe can be pulled to one side, and after welding the three nozzles, weld the pipe connecting the compressor exhaust pipe.

Since it is difficult to weld the middle pipe between the four-way, the middle pipe should be welded first, then the pipes on both sides should be welded, and then the pipe connecting the compressor exhaust pipe should be welded. After the compressor exhaust pipe nozzle is installed and welded, the four joints are welded. La

After installing the four-way valve of the chiller, you need to pay attention to the leakage detection of the refrigeration system, and then put it into use after the leakage detection is completed.