Vertiv | SmartCabinet | User Manual 33
System Installation
Table 2-8
Liquid Pipe OD (inch)
Equivalent length (m)
90° elbow 45° elbow T-type three way
1/4 0.21 0.10 0.76
1/2 0.24 0.12 0.76
Installation Notes of the connector
• Both top as well as the bottom piping methods are compatible with the SmartCabinet (for bottom piping,
loosen the connectors that connect the pre-installed pipes in the cabinet and the indoor unit).
• The connectors of the unit are located on the AC indoor unit and outdoor unit as well as on top of the
cabinet. Utmost care must be taken while connecting the quick thread connector.
Read the following steps thoroughly before making the connection:
1. Remove the dust-proof caps.
2. Wipe the coupling seats and threaded surface with a clean cloth carefully.
3. Lubricate the male thread with refrigerant oil.
4. Thread the coupling halves together manually (by hand) to ensure that the threads mate properly.
5. Tighten the coupling body’s hexagon nut and union valve until a denite resistance is felt.
6. Use a marker to draw a line lengthwise from the coupling unit to the bulkhead. Tighten the nuts by an
additional quarter turn with two wrenches. The misalignment of the lines depicts how much the coupling
has been tightened. The nal quarter turn is essential to ensure that the joint doesn’t leak. Use 2 wrenches
in tandem with each other during the connection as a single wrench can damage the coupling copper lines
easily.
The recommended torque values are listed in the Table 2-9.
Table 2-9
Coupling size
Torque value
(N.m)
1/4” 6 ~ 7
1/2” 8 ~ 9
Required Pipe connections
Following steps must be implemented during connection of the refrigerant pipe between the indoor unit and
the outdoor unit (discharge pipe and liquid pipe).
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