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Connecting the Refrigerant Pipe
There are two refrigerant pipes of differing diameters:
A smaller one for the liquid refrigerant
A larger one for the gas refrigerant
The inside of copper pipe must be clean & has no dust.
1
Before connecting the reprigerant pipe, open the cover side.
2
Remove the pinch pipe on the pipes and connect the assembly pipes
to each pipe, tightening the nuts, first manually and then with a torque
wrench, a spanner applying the following torque.
Outer Diameter
mm
6.35
9.52
12.70
15.88
Note
Must apply refrigerant oil on the flaring area to prevent
a leak.
3
Be sure that there must be no crack or kink on the bended area.
Connect the indoor and outdoor units using pipes with flared
connections(not supplied). For the lines, use insulated, unwelded,
degreased and deoxidized copper pipe,(Cu DHP type to ISO 1337),
suitable for operating pressures of at least 4200 kPa(609.2 psi)
and for a burst pressure of at least 20700 kPa(3002.3 psi).
Copper pipe for hydro-sanitary applications is completely unsuitable.
For sizing and limits (height difference, line length, max. bends,
refrigerant charge, etc.) see the outdoor unit installation manual.
All refrigerant connection must be accessible, in order to permit either
unit maintenance or removing it completely.
Torque
inch
N•m
1/4
14~18
3/8
34~42
1/2
49~61
5/8
68~82
lbf.ft
10.3~13.3
25.1~31.0
36.1~45.0
50.2~60.5
Refrigerant oil
Torque wrench
Flare nut
Union
Cover side
The designs and shape are subject to
change according to the model.
Spanner
11
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