NOTICE
1. To prevent distortion and breaking of the pipe, bend the pipe with a radius of curvature of 6 in.
(150 mm) or more. Use a tubing bender when forming the copper tubing into a bend.
2. If the pipe is bent repeatedly at the same place, it will break.
CAUTION
Connect the gas pipe after connecting the liquid pipe completely.
Refrigerant Piping at the Outdoor Unit
Tighten the flare nut of the connection pipe at the outdoor unit valve connector. Follow the flare nut
guidelines in this manual.
Insulating the Refrigerant Piping and Connections
1. The refrigerant pipes should be insulated and wrapped with appropriate insulating material
and wrapping tape. This will prevent condensation, water leakage and damage to the insulating
material.
2. The connections at the indoor unit should be wrapped with insulating material. No gap is
allowed on the joint of the indoor unit, as shown below.
4. Do not bend the pipe while insulated. First, cut the insulation with a sharp cutting tool and
expose it to the appropriate bend radius, as shown below. After bending the pipe, replace the
insulation and seal it with pipe wrap tape.
22 88-M4MHW17-1A-EN
Installer's Guide
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