Liebert user manual Checklist for Liebert XDC Startup, Liebert XDC pump light indicator

Checklist for Liebert XDC Startup

4.0CHECKLIST FOR LIEBERT XDC STARTUP

! WARNING

Risk of piping and component rupture. May 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.

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 5:

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.

Use the rotation device provided—this device must be held against the pump

housing—at the inspection screw prior to energizing the pumps—Green indicates proper rotation; Green and Red indicate incorrect rotation.

Table 18 Liebert XDC pump light indicator *

Indicator Lights		Description
Green	Red
Off	Off	The electricity supply has been switched off or the pump has
		been cut out by the thermal switch.
On	Off	The electricity supply has been switched on. Normal operation.
On	On	The electricity supply has been switched on. The direction of
		rotation is wrong.

*Use the rotation tester provided with the Liebert XDC for 460V models

4.Check rotation of fans on Liebert XD cooling modules.

5.Verify that air is being discharged in the “cold aisle.”

6.Check rotation of fans on condenser(s) of Liebert XDC (air cooled units only)—Verify that air is being discharged out to the atmosphere.

7.Confirm that the total calculated refrigerant R-134a amount has been properly charged into the system [see 2.5 - Filling the Pumped Circuit—R-134a].

8.Confirm that the total calculated refrigerant R-407c amount has been properly charged into the system (see 2.7 - Filling the Direct Expansion (DX) Circuit—R-407c).

9.Confirm that the remote temperature/humidity sensor provided has been installed in the correct location.

The correct location is near the return side of a main air mover such as a Liebert Deluxe System 3. If more than one Liebert XDC is installed, use a different location for each remote sen- sor for best temperature/humidity calculation.

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