E-
11
ENGLISH
INSTALLING THE
INDOOR UNIT
Installing and Connecting the Indoor Unit Assembly Piping
There are two refrigerant pipes of different diameters:
◆ A smaller one for the liquid refrigerant
◆ A larger one for the gas refrigerant
A short length of piping is already fitted to the air conditioner. You must extend
this piping using assembly piping (optionally supplied).
The connection procedure for the refrigerant piping varies according to the exit
position of the piping from the indoor unit, as seen when facing the air
conditioner in position on the wall:
◆ Right (A)
◆ Left (B)
◆ Rear
1 With a knife, cut out the appropriate knock-out piece on the rear of the indoor unit
(unless you are connecting directly from the rear).
2 Smooth the cut edges.
3 Remove the protection caps on the pipes and connect the assembly piping to each
pipe, tightening the nuts, first manually and then with a torque wrench, applying
the following torque.
Pipe Outer Diameter Torque
Liquid refrigerant inch(6.35 mm) 10.1~12.3ft•lb(140~170kgf•cm)
Gas refrigerant inch(9.52 mm) 18.1~20.3ft•lb(250~280kgf•cm)
Gas refrigerant inch(12.70 mm) 27.5~30.4ft•lb(380~420kgf•cm)
➢
If the piping must be shortened or extended, refer to page 12.
4 Cut off any excess foam insulation.
5 If necessary, bend the pipe round, along the bottom of the indoor unit and out through
the appropriate hole, taking care to ensure that:
◆ The piping does not jut out from the rear of the indoor unit
◆ The bending radius is 4inch(100mm) or more
7 For further details on how to connect up to the outdoor unit and purge the circuit,
refer to page 17.
➢ The piping will be insulated and fixed permanently into position
once the whole installation has been tested for gas leaks; refer to
page 19 for further details.
6 Pass the piping through the hole in the wall.
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