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Installation
Piping Connection
1. Form the piping according to its routing. Avoid bending and
bending back the same piping point more than three times.
(This will result in hardening the pipe.)
2. After deforming the piping, align centers of the union fitting of
the indoor unit and the piping, and tighten them firmly with
wrenches.
3. Connect pipe to the service valve or ball valve which is located
below the outdoor unit.
4. After completing the piping connection, be sure to check if
there is gas leakage in indoor and outdoor connection.
Vacuum drying
After completing the piping connection, execute vacuum drying
for the connecting piping and the indoor unit.
The vacuum drying must be carried out using the service ports of
both the liquid and gas side valves.
Grade
18k
24k
30k
36k
48k
60k
CAUTION: Use two wrenches and
tighten with regular torque.
Flare nut fastening torque
Ø6.35mm
Ø9.52mm
Ø12.7mm
Ø15.88mm
Ø19.05mm
18 Ceiling Cassette Air Conditioner
Liquid side piping Gas side piping
Ø6.35mm
Ø6.35mm
Ø6.35mm
Ø6.35mm
Ø9.52mm
Ø9.52mm
16±2 N . m
38±4 N . m
55±6 N . m
75±7 N . m
110±10 N . m
Ø12.70mm
Ø15.88mm
Ø15.88mm
Ø15.88mm
Ø19.05mm
Ø19.05mm
Liquid side
Outdoor
Flare connection
unit
Gas side
Flare connection
Spanner
Indoor
unit
Torque
wrench
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