Installation Guide

PIPING INSTALLATION
Refrigerant Piping
Indoor
Unit
Piping
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Pipe Diameter Nut Size
Tightening Torque
inch (mm) inch (mm) ft-lbs N-m
1/4 (6.35) 1/4 (17) 10 to 13 15 - 20
3/8 (9.5) 3/8 (22) 25 to 30 30 - 40
1/2 (12.7) 1/2 (25) 36 to 45 45 - 55
5/8 (15.9) 5/8 (29) 50 to 60 60 - 65
Torque Table
NOTE: For maximum serviceability, it is recommended to have refrigerant piping and
drain connections on the outside.
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.
Piping Preparation:
1. Do not open service valves or remove protective caps on pipes until all connections are made.
2. Keep tubing free of dirt, sand, moisture and contaminants.
3. Insulate each refrigerant pipe and condensate hose with minimum 3/8” (10 mm) wall
thermal pipe insulation.
4. Bind refrigerant pipes, the condensate hose and interconnecting cable together with
cable ties at 12-inch intervals.
Use refrigeration grade piping ONLY. Uses of other piping will void the Manufacturer’s Warranty.
CAUTION
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