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3.4 Piping Connection
3.4.1 Indoor Unit
1. Connecting the indoor unit tubing to the
connection piping:
• Align the centers of the pipes and
sufficiently tighten the flare nut with your
hands first.
Fig.3.4.1-1
Indoor unit tubing
Spanner
Fig.3.4.1-2
Wrench Torque
Indoor unit tubing
• Then tighten the flare nut with spanner
and torque wrench by referring the
following table:
Outer diam.
(mm)
Ф6.35 (1/4")
Ф9.52 (3/8")
Ф12.70 (1/2")
Ф15.88 (5/8")
2. Wrap the insulation material around the
connecting portion:
• Cover the indoor unit pipe and the
connection pipe with the heat insulation
material. Bind them together with vinyl
tape so that there is no gap.
Flare nut Pipes
Torque wrench
Spanner (fixed)
Flare nut
Pipings
Torque
Additional
(N.m)
Torque (N.m)
15.7 (1.6kg.m) 19.6 (2.0kg.m)
29.4 (3.0kg.m) 34.3 (3.5kg.m)
49.0 (5.0kg.m) 53.9 (5.5kg.m)
73.6 (7.5kg.m) 78.6 (8.0kg.m)
Fig.3.4.1-3
Cable Ties
• Ensure to isolate separately the suction
pipe from the liquid pipe.
Fig.3.4.1-4
Heat Insulation
Suction line pipe
Liquid line pipe
• Wrap the insulated pipes with vinyl tape
in the rear section for pipe housing.
Fasten the power cable to the pipes
with vinyl tape.
Fig.3.4.1-5
Connection pipe
Vinyl tape (wide)
Fig.3.4.1-6
Connection
cable
• Wrap the piping, drain hose and power
cable tightly with vinyl tape so that
they can fit into the rear piping housing
section.
Fig.3.4.1-7
Drain
hose
Connection
power
cable
Insulation
Material
Indoor
Unit pipe
Wrap with vinyl tape
Pipe
Vinyl tape
(narrow)
Pipe
Vinyl tape
(narrow)
Wrap with
vinyl tape
(wide)
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