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Piping
20
Figure 19 Liebert XD prefabricated piping assembly
6. Thread the return couplers together. The return couplers are the larger of the couplers.
7. Use one of the adjustable wrenches to hold the fixed side of the female coupler on the Liebert XDH
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 20.
NOTICE
Do not overtighten the couplers. Overtightening of couplers will damage the couplers.
Figure 20 Detail view of Liebert XD Flex Pipe and prefabricated piping port
8. Repeat Steps 6 and 7 for the smaller couplers (supply line).
9. Once the supply and return connections are completed, open the return service valves, then open
the supply service valves.
Threaded Cap
(Typical)
Supply Main
Service Valve, typical
(all ports)
Return Main
Tighten collar
with wrench.
DO NOT
OVERTIGHTEN!
Service Valve
Note:
Make sure the valve
is closed before attaching
Liebert Flex Pipe to the system.
Hold threaded coupler here
with a wrench to keep the
pipe stationary while tightening
collar with another wrench.
Liebert 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)