INSTALLING THE INDOOR UNIT

Installing and Connecting the Indoor Unit Assembly Piping

B A

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

1With a knife, cut out the appropriate knock-out piece on the rear of the indoor unit (unless you are connecting directly from the rear).

2Smooth the cut edges.

3Remove 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 (kgf•cm)

Liquid refrigerant

6.35 mm

140~170

Gas refrigerant

9.52 mm

250~280

Gas refrigerant

12.70 mm

380~420

➢If the piping must be shortened or extended, refer to page 35.

4Cut off any excess foam insulation.

5If 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 100 mm or more

6Pass the piping through the hole in the wall.

7For further details on how to connect up to the outdoor unit and purge the circuit, refer to page 39.

➢The piping will be insulated and fixed permanently into position once the whole installation has been tested for gas leaks; refer to page 40 for further details.

E-34