LG JT-C186PLE0, Installation Manual

Page: 20 / 40

Installation
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 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.
CAUTION: Use two wrenches and
tighten with regular torque.
Outd oor
unit
Liquid side
Flare connection
Flare connection
Gas side
Indoor
unit
Spanner
Torque
wrench
Piping Connection
Vacuum drying
Flare nut fastening torque
Ø6.35mm 1.8~2.5 kgf.m
Ø9.52mm 3.4~4.2 kgf.m
Ø12.7mm 5.5~6.6 kgf.m
Ø15.88mm 6.3~8.2 kgf.m
Ø19.05mm 9.9~12.1 kgf.m
Grade Liquid side piping Gas side piping
18k Ø6.35mm Ø12.7mm
24k Ø6.35mm Ø15.88mm
36k Ø15.88mm
48k Ø9.52mm
Ø9.52mm
Ø19.05mm
20 Ceiling Cassette Air Conditioner