E-
38
I
NSTALLING THE
I
NDOOR
U
NIT
5 metres(16ft. 5in) of piping is supplied with the air
conditioner(Optional). This length can if necessary be:
◆
Extended to a maximum of 20m (65ft. 7in).
◆
Shortened as required
☛
If more than 5m (16ft. 5in) of piping is required:
◆
The assembly cable must also be extended
◆
Refrigerant must be added to the circuit by an
approved installer; otherwise, the indoor unit may
freeze
1
Make sure that you have the required tools available
(pipe cutter, reamer, flaring tool and pipe holder).
2
If you wish to shorten the piping, cut it using a pipe cutter, taking care to
ensure that the cut edge remains at a 90° angle with the side of the pipe,
and referring to the illustrations below for examples of edges cut correctly
and incorrectly.
Oblique
Rough
Burr
3
To prevent any gas from leaking out, remove all burrs at the cut end of the
pipe, using a reamer.
4
Slide a flare nut on to the pipe and modify the flare.
Pipe
Outer Diameter (D)
Depth (A)
Liquid refrigerant
6.35 mm(1/4˝)
1.3 mm(1/16˝)
Gas refrigerant
15.88 mm(5/8˝)
2.2 mm(1/8˝)
5
Check that the flaring is correct, referring to the illustrations below for
examples of incorrect flaring.
Inclined
Damaged Surface
Cracked
Uneven Thickness
6
Align the pipes to be connected and tighten the flare nuts first manually
and then with a wrench, applying the following torque.
7
For further details on how to connect up to the outdoor unit and purge the
circuit, refer to page 43.
90
O
O
x
x
x
Cutting/Extending the Piping
Pipe
Outer Diameter
Torque
Liquid refrigerant
6.35 mm(1/4˝)
160kg•cm(11.6ft•lb )
Gas refrigerant
15.88 mm(5/8˝)
700kg•cm(50.6ft•lb )
