Piping Connection; Vacuum Drying - LG LT-E1820CL Manual

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, 24K Btu/h Ø 6.35mm
CAUTION
Use two wrenches and tighten with regular torque.
Flare nut fastening torque
Ø6.35mm
Ø9.52mm
Ø12.7mm
Ø15.88mm
Ø19.05mm
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Gas side piping
Ø15.88mm
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
LGE Internal Use Only