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PIPING INSTALLATION
4
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Indoor
U
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Piping
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NOTE: For maximum serviceability, it is recommended to have refrigerant piping and
drain connections on the outside.
Refrigerant Piping Connections to Indoor Unit
1. Feed refrigerant pipes, drain hose and interconnecting wires assembly
through wall hole from outdoor to the indoor unit.
2. Adjust the length and carefully bend refrigerant pipes to meet indoor
unit refrigerant pipe connections with proper tools to avoid kinks.
3. Apply a small amount of refrigerant oil to the flare connection on
the refrigerant pipes.
22
Pipe Diameter Nut Size
Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6.35) 1/4 (17) 10 to 13 14 to 18
3/8 (9.5) 3/8 (22) 25 to 30 34 to 42
1/2 (12.7) 1/2 (25) 36 to 45 49 to 61
5/8 (15.9) 5/8 (29) 50 to 60 68 to 82
Torque Table
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