How to Install a Cold Storage？(2)

Refrigeration pipeline installation requirements:

1. The diameter of the copper pipe should be selected in strict accordance with the suction and discharge valve interface of the compressor. When the separation between the condenser and the compressor exceeds 3 meters, the diameter of the pipeline should be increased;

2. Keep a distance of more than 400mm between the suction surface of the condenser and the wall, and keep a distance of more than 3 meters between the air outlet and obstacles;

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

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

5. When making the adjustment station, each liquid outlet pipe should be sawed into a 45-degree bevel, inserted to the bottom, and the liquid inlet pipe should be inserted into a quarter of the pipe diameter of the adjustment station;

6. The exhaust pipe and return air pipe should have a certain slope. When the position of the condenser is higher than that of the compressor, the exhaust pipe should slope toward the condenser and a liquid ring should be installed at the exhaust port of the compressor. Prevent gas cooling and liquefaction from flowing back to the high-pressure exhaust port after shutdown, causing liquid compression when restarting;

7. A U-shaped bend should be installed at the outlet of the return air pipe of the cooling fan. The air return pipeline should slope to the direction of the compressor to ensure smooth oil return;

8. The expansion valve should be installed as close to the air cooler as possible. The solenoid valve should be installed horizontally, the valve body should be vertical and pay attention to the liquid outlet direction;

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

10. Before fastening all the sodium and lock nuts in the refrigeration system, they should be lubricated with refrigeration oil to enhance the sealing. Wipe clean after fastening. The roots of each section door shall be locked tightly;

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

12. After the refrigeration system is installed, it should be overall beautiful and consistent in color. There should be no unevenness in pipeline crossing;

13. When the refrigeration pipeline is welded, it is necessary to leave a blowdown outlet to blow the blowdown with nitrogen gas in sections from high and low pressure. After the blowdown in sections is completed, the blowdown of the whole system is qualified until no dirt is seen, and the blowdown pressure is 0.8MPa;

14. After the welding of the whole system is completed, the air tightness test shall be carried out, and the high pressure end shall be filled with nitrogen 1.8MP. The low pressure side is filled with nitrogen 1.2MP. During the pressurization period, use soapy water to check for leaks, carefully check the welding joints, flanges and valves, and keep the pressure for 24 hours after the simple completion without dropping the pressure.

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