After the unit is shut down, the compressor oil heater will be turned on to prevent the refrigerant from condensing and being dissolved in the lubricating oil, causing damage to the compressor. Do not turn off the power while in the stop state. If the main power supply must be switched off (for long maintenance or during shutdown), the compressor suction, exhaust and motor cooling service shut-off valves should also be closed (clockwise);

Press the display button to read the working pressure and temperature from the control center and check if these values are within the operating limits given in the Microcomputer Control Center Operation Manual;

After the system is started or changed, some string bubbles can sometimes be seen from the sight glass. After a few minutes of steady operation, the bubbles will disappear and the refrigerant liquid will be completely visible from the sight glass.

In addition to daily maintenance, the coldest bacteria should also remind everyone to pay attention to the emergency and rapid processing.

When the air-cooled chiller suddenly breaks the cooling water accident and does not deal with it in time, the emergency valve should be immediately stopped when the safety valve takes off. The shutdown procedure is carried out according to the shutdown procedure of the safety valve. First, the compressor power should be turned off immediately. Close the liquid supply valve and the supply valve on the sub-regulation station. Close the suction and exhaust shut-off valves of the compressor (the two-stage compression system first closes the low-pressure stage suction and exhaust shut-off valves, then closes the high-pressure stage suction and exhaust shut-off valves). Set the manual energy regulator valve handle to the zero position. Identify the cause of the sudden cooling of the cooling water and deal with it accordingly.

In the chiller refrigerant recirculation system, the liquid refrigerant in the evaporator absorbs the heat in the water and begins to evaporate. A certain temperature difference is formed between the final refrigerant and the water, and the liquid refrigerant is completely evaporated to a gaseous state and then sucked by the compressor. Compressed, the gaseous refrigerant absorbs heat through the condenser, condenses into a liquid, and is throttled by the thermal expansion valve to become a low-temperature low-pressure refrigerant to enter the evaporator, completing the refrigerant recirculation process.