VARISTAR LHX 20
Commissioning
Cooling module 60714-050
www.schroff.biz
16
R2.1, May 10, 2012
5.5 Bleeding air from the cooling system
Requirements for bleeding the system:
• The water installation must be fully completed. Water inlet to the module
should however still be closed.
• The electrical installation must be completed.
• The refrigeration engineer or plumber with access to the water installation
should be present.
To bleed air from the cooling system the control valve must be open.
The control valve is driven by a servo actuator
and opened and closed by the control electronics according to the demand for
cooling.
The control valve is only open when:
• the supply voltage is present,
• the cooling module is switched on,
• and the ambient temperature is over 18 °C.
At temperatures below 18 °C and without power the valve is closed and bleed-
ing cannot take place.
For safety reasons Schroff recommends that during bleeding operations
the power supply be isolated and the control valve opened by operating
the actuator manually.
If the equipment consists of multiple VARISTAR cabinets with cooling modules,
all systems are bled together.
Summary of Contents for 60714-050
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