5 2 Install and connect refrigerant pipes
After installing the indoor and outdoor unit, you can connect the pipes.
5
.
2
.
1
Inspection of pipes
Before connecting pipes, inspect pipes so that the following requirement is met;
■
The inside of the pipe is clean, no dust, air or water gathers in the pipe;
■
Flares and nuts at both ends of the pipe are in good condition.
Bend the refrigerant pipe following the scheduled routine. During bending
pipes, avoid the pipe broken or out of shape and keep the bent radius of the
copper pipe as
big as possible (400mm at least) and the bent number no more
than 3 times.
5
.
2
.
2 Connection of pipes
As connecting the refrigerant pipes for indoor units, the operation must be
rapid to make sure that the time for connecting two pipes is not too long at site.
5
.
2
.
2
.
1
When connecting the flared connector ,keep two pipes aligned with the
same center and then
put on the screw nut and revolved them in. Finally , tighten
the screws with wrenches ,refer to the figure below:
Please fix the copper with wrenches in proper torque force according to
Table 4 Torque Force
Table.
.
Fig 18
Table 4
Diameter of copper pipe
(mm)
φ
Tightening torque(kgf
m)
·
6.35
9.52
12.7
15.88
19.05
6.9
9.9
～
1.4
1.7
～
～
4.8
6.2
～
4.8
6.2
1.4
1.7
～
P l e a s e u s e t w o wrenches ,
normal wrench and torque
wrench.
NOTE:
Fi x
18
