7 START THE LIEBERT XDC WITH LIEBERT ICOM
7.1 Checklist for Liebert XDC Startup
CAUTION: Risk of piping and component rupture. Can cause injury or equipment damage.
Closing service valves may isolate liquid refrigerant, causing high pressure and rupture of
piping. Do not close valves without following recommended procedures for repair, maintenance
and replacement of components. Install pressure relief valves in field piping that may become
isolated by service valves.
NOTICE
Risk of unintended pump start. Can cause equipment damage.
Do not install the pump fuses for 60Hz until the system is fully charged with refrigerant. Do not
remove the locking mechanisms from 50Hz circuit breakers or place in the On position until
the system is fully charged with refrigerant. Operating the pumps without a full refrigerant
charge can result in equipment damage.
NOTE: Before any action that could cause a disturbance in the Liebert XD system’s cooling function is
begun, the facility manager MUST be informed. In addition, after the action is taken and the work is
finished, the facility manager MUST be informed
1. Verify that bypass flow controllers were installed (if applicable), see Table 4.2 on page39:
2. Check all isolation ball valves in the Liebert XDC and Liebert XD cooling module and verify that
all are open.
3. Check rotation of Liebert XDC pumps. Rotation should be counterclockwise and in the same
direction as the arrow. See Figure 7.1 on the next page for arrow location on the pump.
Vertiv | Liebert® XDC™ User Manual | 111
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