Emerson XDR User Manual

Liebert XDRs with the pre-charged option are equipped with one-shot couplings on the supply and 

return fittings. These contain a charge of R-134a refrigerant under pressure within the module. This 

charge must not be vented.
Do not remove the pipe caps or plugs before the module is ready for connection to Liebert XD Piping. 

Do not disconnect one-shot Liebert XD Flex Pipes after they have been connected.
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 couplings. These fittings con-

tain pressurized R-134a refrigerant inside the Liebert XDR.
If the module includes the optional, factory-installed, one-shot style couplings, proceed with 6.7.2 - 

Connect a Liebert XDR with One-Shot Couplings to Liebert XD Flex Pipe and see Figure 17.
If the module does not include Liebert Flex Pipes, refer to 6.5 - Venting the Holding Charge for 

Risk of sudden refrigerant discharge. Can cause loss of charge and minor injury.
If the optional pre-charged option is chosen, the Liebert XDR is shipped with a full charge of 

R-134a refrigerant under pressure. Do not remove the pipe caps or plugs before the module is 

ready for connection to Liebert XD Piping.
Supply and return fittings on the pre-charged Liebert XDR modules are one-shot couplings. 

Do not disconnect one-shot couplings after they have been connected. Disconnection will 

release pressurized R-134a refrigerant from the Liebert XDR.

5-7/8"

(149mm)

1-1/2"

(38mm)

2-1/8" 

(54mm)

1-1/8" 

(29mm)

6-1/2" 

(165mm)

TOP VIEW

(Rear of Cabinet)

Refrigerant  

Supply Line

Schrader Valve
(Do Not Vent)

23-1/2" (597mm)

Refrigerant  

Return Line

1-5/16" 

(33mm)