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IT Cooling
LogiCool
OnRak
IT Cooling
53
Technical, Installation and Maintenance Manual :6912497 V1.8.0 _08_2014
Commissioning Procedure
Fan Removal Alarm
Check alarm state when a fan goes offline.
Differential Pressure
The differential pressure switch should cause the OnRak fans to increase / decrease
when the server fans are active.
One of the fans can be removed to allow the differential pressure to be recognised if the
server load is low.
If the server discharge temperature is high the differential pressure feature becomes
second priority, ensuring that the cooling demand is satisfied.
Dew Point Control
The dew point control feature will isolate the chilled water supply to the unit if the water
temperature falls lower than the dew point temperature of the air. The OnRak water
temperatures can be offset to produce this alarm through the maintenance parameter of
the controller.
Rack Support Wheel
Ensure that the rack support wheel turns freely and supports the OnRak door when full of
water.
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