Liebert Cooling System XDV - Manual (Page 28)

Piping
22
6.4 Hard Piped Connection Sizes
Supply piping connection is 1/2" OD copper pipe and return piping connection is 5/8" OD copper.
6.4.1 Holding Charge—Hard-Piped Units
The Liebert XDV in hard-piped configuration is shipped with a low-pressure holding charge (about 30
psi) of nitrogen to prevent oxidation and moisture. This must be vented before removing the caps on the
ends of the supply and return piping.
To vent the holding charge:
1. Find the Schrader valve that contains the nitrogen holding charge in the Liebert XDV (see
Figure 24).
2. Vent the holding charge by depressing the pin in the valve.
3. Replace and secure the cap on the Schrader valve.
Figure 24 Piping location and connection sizes—hard-piped units
SCHRADER VALVE
SUPPLY (IN)
RETURN (OUT)
Return
Connection
5/8"
3/4"
(19mm)
1-1/8"
(29mm)
2-3/8"
(60mm)
Supply
Connection
1/2"
Schrader Valve
Rear of Liebert XDV
2-5/8"
(67mm)
DPN000770
Page 4, Rev. 5
Top View of
Liebert XDV