LNEYA Chiller
Precautions for the refrigeration pipeline of the chiller
- 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.
- Keep the air suction surface of the condenser at a distance of more than 400mm from the wall, and keep the air outlet at a distance of more than 3 meters from obstacles.
- The diameter of the inlet and outlet pipes of the liquid storage tank shall be subject to the diameters of the exhaust and liquid outlet pipes marked on the unit sample.
- The suction line of the compressor and the return air line of the cooling fan shall not be smaller than the size indicated in the sample to reduce the internal resistance of the evaporation line.
- When making the adjustment station, each liquid outlet pipe should be sawed into a 45-degree bevel and inserted to the bottom, and the liquid inlet pipe should be inserted into a quarter of the pipe diameter of the adjustment station.
- The exhaust pipe and the air return 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 the gas cooling and liquefaction from flowing back to the high-pressure exhaust port after shutdown, causing liquid compression when restarting the machine.
- A U-shaped bend should be installed at the outlet of the return air pipe of the cooling fan. The return air pipeline should slope towards the direction of the compressor to ensure smooth oil return.
- The expansion valve should be installed as close as possible to the air cooler. The solenoid valve should be installed horizontally, the valve body should be vertical and pay attention to the liquid outlet direction.
- 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.
- 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.
- The temperature-sensing package of the expansion valve is fastened at 100mm-200mm from the outlet of the evaporator with metal clips, and tightly wrapped with double-layer insulation.
- After the refrigeration system is installed, it should be overall beautiful and consistent in color. There should be no unevenness in pipeline crossing height.
- When the refrigeration pipeline is welded, there should be a blowdown outlet. Use nitrogen blowing from high and low pressure to carry out segmental blowdown. After the segmental blowdown is completed, the whole system is blown down until no dirt is seen. The blowing pressure is 0.8MPa.
- 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 1.8MP nitrogen. The low pressure side is filled with nitrogen 1.2MP. Use soapy water to check for leaks during pressurization, carefully check each welding joint, flange and valve, and perform a pressure-holding test after simple completion, not less than 24 hours.
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