–30–
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.
After completing the piping connection, execute vacu-
um drying for the connecting piping and the indoor
unit.
The vacuum drying must be carried out using the ser-
vice ports of both the liquid and gas side valves.
Use two wrenches and tighten with regular torque.
Outdoor
unit
Liquid side
Flare connection
Flare connection
Gas side
Indoor
unit
Union
Piping Connection
Vacuum drying
CAUTION
Flare nut fastening torque
Ø6.35mm
1.8kg.mm
Ø9.52mm
4.0kg.mm
Ø12.7mm
5.5kg.mm
Ø15.88mm
6.6kg.mm
Ø19.05mm
6.6kg.mm
Model
Liquid side piping
Gas side piping
24K, 28K, 30K BTU
Ø 9.52mm
Ø15.88mm
36K BTU
Ø 9.52mm
Ø19.05mm
