E-
10
I
NSTALLING
THE
A
IR
CONDTIONER
Installing and Connecting the Assembly Pipe of the Indoor Unit
Connect indoor and outdoor units with field-supplied copper pipes by means
of flare connections. Use insulated seamless refrigeration grade pipe only, (Cu
DHP type according to ISO1337), degreased and deoxidized, suitable for op-
erating pressures of at least 4200 kPa and for burst pressure of at least 20700
kPa. Under no circumstances must sanitary type copper pipe be used.
There are 2 refrigerant pipes of different diameters:
The smaller one is for the liquid refrigerant
The larger one is for the gas refrigerant
A short pipe is already fitted to the air conditioner. You may need to extend the
pipe using the assembly pipe (optional).
The connection procedure for the refrigerant pipe varies according to the exit
position of the pipe when facing the wall:
Right(A)
Left(B)
Underside(C)
Rear
1
Cut out the appropriate knock-out piece (A, B, C) on the rear of the indoor unit
unless you connect the pipe directly from the rear.
2
Smooth the cut edges.
3
Remove the protection caps of the pipes and connect the assembly pipe
to each pipe. Tighten the nuts first with your hands, and then with a torque
wrench, applying the following torque:
Outer Diameter
Thickness
Torque (kgf•cm)
ø6.35 mm
0.8mm
140~170
ø9.52 mm
0.8mm
250~280
ø12.70 mm
0.8mm
380~420
ø15.88 mm
1.0mm
440~480
ø19.05 mm
1.0mm
990~1210
ø22.23 mm
1.0mm
990~1210
Note
If you want to shorten or extend the pipes, refer to page 12.
4
Cut off the remaining foam insulation.
5
If necessary, bend the pipe to fit along the bottom of the indoor unit.
Then pull it out through the appropriate hole.
The pipe should not project from the rear of the indoor unit.
The bending radius should be 100 mm or more.
6
Pass the pipe through the hole in the wall.
7
For further details on how to connect to the outdoor unit and purge the air,
refer to page 11.
B
A
C
Tighten the flare nut with torque wrench according to specified method.
If the flare nut is over-tightened, the flare may break and cause
refrigerant gas leakage.
DO NOT WALL UP THE PIPE CONNECTION !
All refrigerant pipe connection must be easy accessible and serviceable.
CAUTION