① Condenser heat well , otherwise they will be cold - condensing temperature and the corresponding condensation pressure is too high , so that the water chiller pressure protection device operation while parking , and even lead to failure.
② Evaporator water should circulate , otherwise they will be cold water temperature is low , resulting in cold temperature protection device operation while parking , or because the corresponding evaporation temperature and evaporation pressure is too low , is the low - voltage protection devices chiller operation and parking , even cause the evaporator freezing cold damage to the equipment . Therefore, chillers boot order: ( must be strictly observed ) cooling tower fan open - > cooling water pump open - > cold water pump open - > open chiller chiller shutdown sequence: ( must be strictly observed ) chillers stop - > cooling tower fan stops - > cooling water pump stops - > cold water pump stops
Chiller Maintenance Considerations
① Shutdown, chillers should be shut down for half an hour before work , after work cold water pump shut down , help save energy , while avoiding downtime , protect the unit .② Run the refrigeration cycle , you should confirm heating cycle pipeline valves have been closed .