In winter in the north of Dongguan, due to the low ambient temperature, the compressor and refrigeration system temperatures were very low at the beginning of startup, resulting in low high and low pressure, and low cooling capacity in the early stage.
When encountering this situation, it is generally the case that the water chiller manufacturer does not have the corresponding experimental equipment when producing the water chiller, or does not install a compressor crankshaft heater or a medium pressure protection switch in order to save money.
terms of settlement:
Add a crankshaft heater to preheat the engine during long-term shutdown. Add a medium pressure switch (1.5MP differential pressure 0.2MP) to control the start and stop of the condensing fan, achieving the purpose of controlling the condensing pressure.