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24
6.6 Connection Methods—One-Shot Connections
The assembly and connection means used for piping in the Liebert XD system are the same as those
used in conventional refrigeration systems. Observe all standard practices during installation and
startup to prevent damage and contamination.
Both supply and return fittings may be supplied with optional, one-shot connections. These fittings
contain pressurized R-134a refrigerant inside the Liebert XDV.
If the unit includes the optional, factory-installed, one-shot style connections, proceed with 6.7 - Field
Installation of Liebert Flex Pipe Kit on Liebert XDV and see Figure 26.
If the unit does not include flex piping, refer to 6.4.1 - Holding Charge—Hard-Piped Units.
Figure 26 Piping location and connection sizes—pre-charged units with one-shot connections
Table 4 Branch piping sizes for refrigerant loop
Pipe Function Size / Equivalent Pipe Length
Liebert XDP/Liebert XDC supply line, from
Liebert XDP/Liebert XDC supply
to farthest Liebert XDV
1-1/8" OD (1.025" ID) for lengths up to 60 feet (18m)
1-3/8" OD (1.265" ID) for lengths over 60 but less than 175 feet (18 to 53m)
Liebert XDP/Liebert XDC return line, from
farthest Liebert XDV
to Liebert XDP/Liebert XDC return
2-1/8" OD (1.985" ID) for lengths up to 60 feet (18m)
2-5/8" OD (2.465" ID) for lengths over 60 but less than 175 feet (18 to 53m)
From Liebert XDV supply to supply line of
Liebert XDP/Liebert XDC
1/2" OD (0.430" ID) for lengths up to 6 feet (1.8m)
5/8" OD (0.545" ID) for lengths over 6 feet but less than 35 feet (1.8-10.6m)
From Liebert XDV return to return line of
Liebert XDP/Liebert XDC
5/8" OD (0.545" ID) for lengths up to 6 feet (1.8m)
7/8" OD (0.785" ID) for lengths over 6 feet but less than 35 feet (1.8-10.6m)
!
CAUTION
Risk of sudden refrigerant discharge. Can cause injury and loss of charge.
If the optional pre-charged option is chosen, the Liebert XDV unit is shipped with a full
charge of R-134a refrigerant under pressure. Do not remove the pipe caps or plugs before the
unit is ready for connection to Liebert XD Piping.
Supply and return fittings on the pre-charged Liebert XDV units are one-shot connections. Do
not disconnect one-shot connections after they have been connected. Disconnection will
release pressurized R-134a refrigerant from the Liebert XDV.
Detail
Area “A”
Detail “A”
Return
Connection
5/8"
Supply
Connection
1/2"
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