Liebert Cooling Modules XDH - Manual (Page 30)

Operation
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8.0 O
PERATION
The Liebert XDH’s controls are on the front of the unit at the Liebert XDH’s midline for easy access.
Each switch controls the operation of one bank of three fans (see Figure 26). The separate switches
permit the use of only one bank of fans at a time, reducing the airflow if the Liebert XDH’s full cooling
capacity is not needed.
Figure 26 Fan switches
8.1 Start the Liebert XDH
The Liebert XDH’s fans must be on before starting the Liebert XDP or Liebert XDC that will supply
refrigerant to the Liebert XDHs.
To start the Liebert XDH, press either of the rocker switches to turn on one or both of the Liebert
XDH’s banks of fans. Pressing the left switch starts the fans in the upper half of the Liebert XDH; the
right switch, the lower fans.
The refrigerant sources, either Liebert XDP or Liebert XDC, must be started separately.
NOTE
At least one of the Liebert XDH’s banks of fans must be turned on before either the Liebert XDP
or Liebert XDC is switched on.
At least one of the Liebert XDH’s banks of fans must be operating at all times that the Liebert
XDP or Liebert XDC is operating. Operating either the Liebert XDP or the Liebert XDC without
at least one of the Liebert XDH’s banks of fans rotating may cause a system malfunction.
Upper Fan Bank Switch Lower Fan Bank Switch