What are the operation steps and methods for filling refrigerant in air conditioning?
1. Prepare tools, hoses to charge refrigerant, refrigerant cylinders, pressure gauges, etc. Use a hose to connect the steel cylinder, pressure gauge and the refrigerant inlet of the external machine together, and then exhaust the air in the pipe. Start the compressor and open the cylinder to fill the compressor with air conditioner.
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2. Add refrigerant to the air conditioner as follows: 1: Turn on the air conditioner first to make the air conditioner run. 2: Then remove the outer machine, you can see that there are two copper pipes inside, the large copper pipe is called the low pressure pipe, the small copper pipe is called the high pressure pipe, you should open the nut below the small copper pipe.
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3. Filling refrigerant should be carried out after vacuuming, and there are four kinds of filling methods: weighing filling method, gauge pressure filling method, experience filling method and quantitative filling method. (1) Weighing and filling method Weighing and filling method is a filling method that uses electronic scales to weigh.
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4, air conditioning refrigerant process: ensure that the air conditioning is turned off. If the air conditioning freon leaks light, it is necessary to fill the vacuum before adding. If there is more freon, the freon emptying system can be used directly. Find the thick tube under the outer machine and add fluorine from the thick tube. Or open the external machine and add fluorine from the suction end of the compressor.