YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World!
24
INDOOR UNIT INSTALLATION
Piping Joints Thermal Insulation:
Wrap the piping joints with thermal insulation
and then wrap with a vinyl tape
Piping Thermal Insulation:
o
Place the drain hose under the piping
o
Use insulation materials that contain polyethylene foam that is over
6mm in thickness
Note: Drain hose is prepared by the installer.
Do not arrange the drain pipe twisted, sticking out, or where it can move
around. Do not immerse the end of the drain pipe in water.
If an extension drain hose is connected to the drain pipe, make sure to insulate
it when passing behind the indoor unit.
When the piping is directed to the right, the piping, power cord, and drain pipe should be insulated and fixed to the
back of the unit with a piping fastener.
Piping Connection:
a) Connect indoor unit pipes with two wrenches. Pay special attention to the allowed
torque as shown in the table below to prevent the pipes, connectors, and flare
nuts from being deformed or damaged
b) Pre-tighten the nuts with fingers, then tighten with wrenches.
Model
Pipe Size
Torque
Nut Width
mm / in.
Min. Thickness
mm / in.
9k-18k Btu/h
Liquid
Pipe 1/4”
15~20N~m or
11~15 ft.-lbs
17 / 5/8
0.5 / 0.02
24k-36k Btu/h
Liquid Pipe 3/8”
15~20N~m or
11~15 ft.-lbs
22 / 7/8
0.6 / 0.024
9k-12k Btu/h
Gas Pipe 3/8”
15~20N~m or
11~15 ft.-lbs
22 / 7/8
0.6 / 0.024
18k Btu/h
Gas Pipe 1/2”
15~20N~m or
11~15 ft.-lbs
24 / 15/16
0.6 / 0.024
24k-36k Btu/h
Gas Pipe 5/8”
15~20N~m or
11~15 ft.-lbs
27 / 1 1/16
0.6 / 0.024
