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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
• Must apply refrigerant oil on the flaring area to prevent a
leak.
NOTE
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
CAUTION
operating pressures of at least 4200kPa and for a burst pressure of at least 20700kPa. 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.
DVM S NASA_Global 4-WC_사우디향_IM_EN_04191A.indd 13
Torque
kgf•cm
N•m
140~180
14~18
350~430
34~42
500~620
49~61
690~830
68~82
Refrigerant oil
Torque wrench
Flare nut
Union
Cover side
The designs and shape are subject to change
according to the model.
2013-11-05 오전 11:30:24
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