SINGLE SCREW CHILLERS IMM
Engineered for Flexibility and Performance
33
10. Precautions for Long-time Stop
The following shall be done in case of long-time stop:
a. Shut down stop valve in the liquid supply piping; keep the chiller running until low pressure
alarm.
b. Cut off power, disconnect air switch in control circuit, and press the red emergency switch to
prevent oil being heated and chiller being turned on by mistake. Cut off the power supply in
case of long-time stop to save electricity and ensure the safety.
c. Drain and clean heat exchanger when then chiller stops for a long time or the vessels will be
rusted, and tubes will be damaged by ice when ambient temperature drops below zero. After
the water is drained, please completely clean the internal parts of the chiller to prevent internal
corrosion.
Select antifreeze that doesn’t react with iron, copper and neoprene.
● Re-operation after long-time stop
Please check the following before re-operation after a long-time stop and contact with the local
Daikin service branch.
1. Test insulation resistance before chiller starts. (More than 2 M
when test voltage is 380V
three-phase AC)
2. Power chiller more than 8 hours before turn it on to heat the oil. [7. Matters to be confirmed
before Performing Test Run]
