Piping
20
6.7.2 Connect a Liebert XDR with One-Shot Couplings to Liebert XD Flex Pipe
NOTICE
Risk of improper reuse of Liebert XD Flex Pipes with one-shot couplings. Can cause
refrigerant leaks.
Liebert XD Flex Pipes with one-shot couplings must not be removed from the Liebert XDR
unless they are being replaced with Liebert XD Flex Pipes with one-shot couplings. Do not
reuse Liebert XD Flex Pipes with one-shot couplings. Reuse may result in refrigerant leaks.
Tools Required
• Two adjustable wrenches with a maximum adjustment size of 2 inches
• One torque wrench, half-inch drive (see Table 2 for sizes)
• Refrigerant oil
1. Check the Liebert XD Flex Pipe for proper length.
2. Remove the protector cap and plug from the connections and carefully wipe the couplings and
threaded surfaces clean.
3. Use a small applicator brush saturated with refrigerant oil to lubricate the entire surface of the
diaphragm and the O-ring. Refer to Figure 18.
Figure 18 Male coupling on Liebert XD cooling module
If refrigerant oil is not used, an alternate lubricant for this application is a refrigerant-compatible
silicone grease product, such as Dow Corning DC200/60,000 cst.
4. Thread the coupling halves together by hand to ensure that the threads mate properly. Ensure
that the Schrader valve is oriented so that it is accessible for service.
Figure 19 Female one-shot coupling Liebert Flex Pipe: Schrader valve location
Oil Rubber Seal
and Face of Diaphragm
Coupling Size
Marking on Lip
of Coupling
Schrader
Valve
