Purging The Unit; Connecting The Refrigerant Pipe - Samsung Duct Type Series Installation Manual

Purging the Unit

On delivery, the indoor unit is loaded with inert gas. All this gas must therefore be purged before connecting the assembly
piping. To purge the inert gas, proceed as follows.
Unscrew the pinch pipe at the end of each refrigerant pipe.
Result : All inert gas escapes from the indoor unit.
• To prevent dirt or foreign objects from getting into the pipes during
installation, do NOT remove the pinch pipe completely until you are
NOTE
ready to connect the piping.

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.
The connection procedure for the refrigerant pipes varies according to the
exit position of the pipes from the indoor unit, as seen when facing the indoor
in the "A" side.
Liquid refrigerant port
Gas refrigerant port
Drain hose port
1. 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
12.7
15.88
19.05
• Must apply refrigerant oil on the flaring area to prevent a leak.
NOTE
2. Be sure that there must be no crack or kink on the bended area.
10
inch N•m
1/4 14 ~ 18
3/8 34 ~ 42
1/2 49 ~ 61
5/8 68 ~ 82
3/4 100 ~ 120
Torque wrench
Torque
Ibf•ft
10.3 ~ 13.3
25.1 ~ 31.0
36.1 ~ 45.0
50.2 ~ 60.5
73.8 ~ 88.5
❋ The designs and shape are subject
Liquid refrigerant
port
Gas refrigerant port
Welding flame
Refrigerant oil
Flare nut
A
to change according to the model.
Wet cloth
Spanner
Union