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Refrigeration Pipe Installation Technology

Refrigeration Pipe Installation Technology

  • 2020-12-15

1. The selection of the diameter of the copper pipe should be in accordance with the pipe diameter of the compressor suction and exhaust valve. When the condenser is separated from the compressor by more than 3 meters, the pipe diameter should be increased.


2. The suction surface of the condenser and the wall are kept at a distance of more than 400 mm, and the air outlet and the obstacle are kept at a distance of more than 3 meters.


3. The diameter of the inlet and outlet of the liquid storage tank shall be based on the exhaust and outlet diameters indicated on the unit sample.


4. The compressor suction line and the air cooler return line shall not be smaller than the size indicated in the sample to reduce the internal resistance of the evaporation line.


5. When the adjustment station is made, each outlet pipe should be sawed into a 45-degree oblique opening and inserted into the bottom end. The inlet pipe is inserted into one-fourth of the diameter of the regulating station.


6. The exhaust pipe and the return pipe should have a certain gradient. When the condenser position is higher than the compressor, the exhaust pipe should be inclined to the condenser and a liquid ring should be installed at the compressor exhaust port to prevent the gas from being cooled back after the shutdown. ? At the high pressure exhaust port, the liquid is compressed when the machine is turned on again.


7. U-bend should be installed at the exit of the return pipe of the air cooler. The return line should be oriented in the direction of the compressor to ensure smooth oil return.


8. The expansion valve should be installed as close as possible to the cooling fan. The solenoid valve should be installed horizontally, the valve body should be vertical and the direction of the liquid should be noted.


9. If necessary, install a filter on the compressor return line to prevent dirt in the system from entering the compressor and remove moisture from the system.


10. Before the sodium and lock nuts of the refrigeration system are tightened, the lubricating oil should be wiped to strengthen the seal. After tightening, wipe it clean and the roots of each cut door should be locked.


11. The expansion valve temperature sensing package is fastened with a metal card at the outlet of the evaporator at 100mm-200mm, and is tightly wrapped with double insulation.


12. After the installation of the refrigeration system is completed, the overall appearance is beautiful and the colors are consistent. There should be no inconsistency in pipeline crossings.


13. When the refrigeration pipeline is welded, the sewage outlet should be left from high and low pressure with nitrogen blowing for partial blowdown. After the partial blowdown is completed, the whole system will be blown until no dirt is found. The blowdown pressure is 0.8MP.

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