The sequence of opening and stopping of the chiller should ensure that the air-conditioner can operate normally after starting, and must ensure:
1 The condenser has good heat dissipation. Otherwise, the cold-condensation temperature and the corresponding condensing pressure will be too high, so that the high-pressure protection device of the industrial chiller will stop and even cause malfunction.
2 The cold water in the evaporator should be circulated, otherwise the cold water temperature will be low, causing the cold water temperature protection device to stop and stop, or because the evaporation temperature and the corresponding evaporation pressure are too low, the low-pressure protection device of the chiller will stop and even stop. Causes cold water in the evaporator to freeze and damage the equipment. Therefore, the order of starting the chillers is: (must be strictly observed) cooling tower fan opening -> cooling water pump opening -> cold water pumping -> chiller opening chiller shutdown sequence: (must be strictly observed) chiller Stop -> Cooling tower fan stop -> Cooling pump stop -> Cold water pump stop
Chiller maintenance and precautions
1 When the machine is shut down, the industrial chiller should be shut down half an hour before leaving work. The cold water pump is shut down after work, which is conducive to saving energy, avoiding downtime and protecting the unit.
2 Before running the refrigeration cycle, make sure that the heating circulation pipe valves are all closed.