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Piping Connections and Piping Access Points
15
Figure 13 Liebert XD prefabricated piping assembly
5. Thread the return couplers together, the larger of the two couplers (Liebert XD Flex Pipe and
return main).
6. Use one of the adjustable wrenches to hold the fixed side of the female coupler on the Liebert
XDCF stationary. With the other adjustable wrench, tighten the collar onto the coupler.
Tighten these only until the force required to tighten abruptly increases. See Figure 14.
NOTICE
Do not overtighten the couplers. Overtightening of couplers will damage the couplers.
Figure 14 Detail view of Liebert XD Flex Pipe and prefabricated piping port
7. Repeat Steps 5 and 6 for the smaller coupler (supply line).
8. Once the supply and return connections are completed, open the return service valve, then open
the supply service valve.
With the equipment running, cool air is discharged from the back of the Liebert XDCF.
Threaded Cap
(Typical)
Supply Main
Service Valve, typical
(all ports)
Return Main
Tighten collar
w
ith wrench.
DO NOT
OVERTIGHTEN!
Service Valve
Note:
Make sure the valve
is closed before attaching
flex pipe to the system.
Hold threaded coupler here
with a wrench to keep the
pipe stationary while tightening
collar with another wrench.
Flex Pipe
Supply Side Torque Range for
1/2" coupler is 22.1 to 25.8 lb/ft (30-35Nm)
Return Side Torque Range for
1" coupler is 59 to 62.7 lb/ft (80-85Nm)