Piping
6.9Connecting a Liebert XDV with Liebert Flex Pipe to an Operational Liebert XD System
NOTICE
Before connecting the Liebert XDV with Liebert Flex Pipe to the prefabricated piping mains, check the whole system for leaks.
Check the Liebert XDV to ensure that the unit has no refrigerant leaks. Read all instructions before beginning installation.
Tools Required
•Two adjustable wrenches, with a maximum adjustment size of
•Two ladders
•Lifting mechanism if the Liebert XDV is going to be suspended above the cabinet
NOTE
This operation requires two or more people.
1.Determine the port location of the supply and return piping overhead
2.Make sure the service valve for each port is closed
3.Remove cap for only the required ports. Do not remove caps from the unused ports.
4.Once Step 3 has been completed, remove the pipe plugs that are supplied on the Liebert Flex Pipe on the Liebert XDV.
Figure 28 Liebert XD prefabricated piping assembly
| Return Main |
Supply Main | Service Valve, typical |
| (all ports) |
Threaded Cap (Typical)
5.Use system refrigerant to lubricate the face of the male coupling half, including the poppet valve face and the stainless steel delta ring.
6.Thread the return couplers together, the larger of the two couplers (Liebert Flex Pipe and return main).
7.Use one of the adjustable wrenches to hold the fixed side of the female coupler on the Liebert XDV 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 29.
NOTICE
Do not overtighten the couplers. Overtightening of couplers will damage the couplers.
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