E-
10
INSTALLING THE INDOOR UNIT
Cutting/Extending the Piping
Make sure that you have the required tools available (pipe cutter, reamer,
flaring tool and pipe holder).
1
To prevent any gas from leaking out, remove all burrs at the cut end of the
pipe, using a reamer.
3
Outer Diameter
(D)
Depth
(A)
1/4 inch
0.05 inch
3/8 inch
0.07 inch
1/2 inch
0.08 inch
Slide a flare nut on to the pipe and modify the flare.
4
Outer Diameter
Torque
1/4 inch
10.1~12.3 ft.lb
3/8 inch
18.1~20.3 ft.lb
1/2 inch
27.5~30.4 ft.lb
Align the pipes to be connected and tighten the flare nuts first manually and
then with a torque wrench, applying the following torque.
6
Check that the flaring is correct, referring to the illustrations below for examples of incorrect
flaring.
5
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.
2
Oblique
Rough
Burr
Inclined
Damaged Surface
Cracked
Uneven Thickness
D
A
��
�
O
x
x x
�
�
�
�
For further details on how to connect up to the outdoor unit and purge the circuit, refer to
page 23.
7
In case welding the pipe, the gas nitrogen must be blown into the parts.
