Precautions for cooling pipes

Precautions for cooling pipes

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

  2. The distance between the suction surface of the condenser and the wall should be more than 400mm, and the distance between the outlet and the obstacle should be more than 3 meters.

  3. The diameter of the inlet and outlet pipe of the liquid storage tank shall be subject to the diameter of the exhaust and outlet pipe indicated on the unit sample.

  4, the compressor suction pipe and the air cooler return pipe shall not be less than the size indicated in the sample to reduce the internal resistance of the evaporation pipe.

  5. When the regulating station is made, each outlet pipe should be sawed into a 45 degree bevel and inserted into the bottom end, and the inlet pipe should be inserted into 1/4 of the diameter of the regulating station pipe.

  6, the exhaust pipe and return pipe should have a certain slope, when the condenser position is higher than the compressor, the exhaust pipe should slope towards the condenser and install the liquid ring at the compressor exhaust port. Prevent gas cooling and liquefaction reflux to the high-pressure exhaust port after shutdown, resulting in liquid compression when restarting.

  7. U-shaped bend should be installed at the outlet of the air cooler return pipe. The return pipe should slope towards the compressor to ensure smooth oil return.

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

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

  10, refrigeration system all sodium and lock before fastening, to apply freezing oil lubrication, strengthen the sealing. Tighten and wipe clean. All closure doors should be locked tightly.

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

  12, after the installation of the refrigeration system, the overall appearance should be consistent in color. There should be no cross height inequality.

  13, refrigeration pipeline welding to leave a sewage outlet from high and low pressure with nitrogen blowing for stage blowing, stage blowing after the completion of the whole system until there is no dirt is qualified. The blowing pressure should be 0.8MPa.

  14, after the whole system is welded, the air tightness test should be carried out, and the high pressure end is filled with nitrogen 1.8MP. The low pressure end is charged with nitrogen 1.2MP. Check the leakage with soapy water during the pressurization period, carefully check the welding joints, flanges and valves, and maintain the pressure test after simple completion, not less than 24 hours.

Shanghai KUB Refrigeration Equipment Co., Ltd.

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