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Installation Manual of Room Air Conditioner
3. Piping connection
Connecting method
Apply refrigerant oil at half union and flare nut.
To bent a pipe, give the roundness as large as possible not to crash the pipe.
When connecting pipe, hold the pipe center to center then screw nut on by hand, refer to Fig.
Be careful not to let foreign matters, such as sands enter the pipe.
Piping connection of the indoor unit
1. Arrangement of piping and drainage pipe
Remove the cover before working.
Cut away, with a hammer or a saw, the lid for piping according to piping direction.
insulation material
Copper tube
According to the piping method, connect the piping on indoor unit with union of connection pipe.
Arrange the piping as per the wall hole and bind drain hose connecting electric cable and piping
together with polyethylene tape.
Insert the bound piping connecting electric cable and drain hose through wall hole to connect
with outdoor unit.
2. Arrangement drain hose
Drain hose shall be placed in under place.
There should be a slope when arrange drain hose. Avoid up and down waves in drain hose.
If humidity is high, drain pipe(especially in room and indoor unit) must be covered with
installation material.
Forced fastening without careful
centering may damage the
threads and cause a leakage of gas.
Fastening torque
Pipe Diameter
Liquid side 6.35mm(1/4")
Gas side 9.52mm(3/8")
Gas side 12.7mm(1/2")
Drain hose
Connecting electric cable for
indoor and outdoor unit
26
18N.m
42N.m
55N.m
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