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Installing and Connecting the Assembly Pipe of the Indoor Unit
A
C
Refrigerant oil
Torque wrench
Flare nut
12
E-
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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 operating
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)
B
Left(B)
Underside(C)
Rear
1
Cut out the appropriate knock-out piece 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:
Spanner
If you want to shorten or extend pipes, refer to page 13.
Union
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 7.
The pipe will be insulated and fixed permanently into position after
finishing the installation and the gas leak test; refer to page 21 for
further details.
DO NOT WALL UP THE PIPE CONNECTION !
All refrigerant pipe connection must be easy accessible and serviceable.
Outer Diameter
6.35 mm (1/4")
9.52 mm (3/8")
12.70 mm (1/2")
15.88 mm (5/8")
Torque (kgf•cm)
145~175
333~407
505~615
630~769
2010-5-8 10:34:52
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