LG LT-E1860FJ/FH Service Manual page 28

Piping Connection
1. Form the piping according to its routing. Avoid bend-
ing and bending back the same piping point more
than three times. (This will result in hardening of
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 ser-
vice ports of both the liquid and gas side valves.
Model Liquid side piping
18K Btu/h Ø 6.35mm
24K Btu/h Ø 6.35mm
28K Btu/h Ø 6.35mm
36K Btu/h Ø 6.35mm
48K Btu/h Ø 9.52mm
CAUTION
Use two wrenches and tighten with regular torque.
Flare nut fastening torque
Ø6.35mm
Ø9.52mm
Ø12.7mm
Ø15.88mm
Ø19.05mm
Gas side piping
Ø12.7mm
Ø15.88mm
Ø15.88mm
Ø15.88mm
Ø19.05mm
1.8kg . m
4.0kg . m
5.5kg . m
6.6kg . m
6.6kg . m
–28–
Liquid side
Outdoor
Flare connection
unit
Gas side
Flare connection
Indoor
unit
Union