Installation
3-4 ULVAC CRYOGENICS INCORPORATED
３．The cooling water should be stopped when the compressor is not running or it may
damage the heat exchanger.
If the temperature of the cooling water is below 10℃, stop the cooling water when the
compressor has been stopped. If the cooling water of temperature below 10℃ is
supplied continuously while stopping the compressor, it may increase viscosity of
lubricant oil and cause start up failure of the compressor when the operation command
is sent.
CAUTION
The cooling water must be drained and purged from the compressor unit when:
・There is a possibility that the cooling water might freeze when the compressor unit is
not running. The water pipe can burst.
・The compressor unit will not be turned on for a long time (more than a week).
・Shipping the compressor unit.
Most of the cooling water can be purged from the compressor by blowing air into the
compressor for 30 seconds at inlet pressure of 0.2MPaG with the outlet opened.
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