Step 7 Connecting The Assembly Pipes To The Refrigerant Pipes - Samsung AC035MNLDKH Installation Manual

Installation Procedure
5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Inclined
Correct
CAUTION
• If the pipes require brazing ensure that OFN (Oxygen
Free Nitrogen) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 ~ 0.05MPa.
Step 7 Connecting the assembly
pipes to the refrigerant pipes
There are two refrigerant pipes of different 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 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.
Refrigerant oil
Torque wrench
18
English
Cracked Uneven
Damaged
Surface Thickness
Spanner
Flare nut
Union
Outer diameter (D)
Ø6.35 mm
Ø9.52 mm
Ø12.70 mm
Ø15.88 mm
Ø19.05 mm
NOTE
• If the pipes must be shortened refer to page 17,
Step 6 Cutting and flaring the pipes
2 Be sure to use insulator which is thick enough to cover
the refrigerant tube to protect the condensate water
on the outside of pipe falling onto the floor and the
efficiency of the unit will be better.
3 Cut off any excess foam insulation.
4 Be sure that there must be no crack or wave on the
bended area.
5 It would be necessary to double the insulation
thickness(10mm or more) to prevent condensation even
on the insulator when if the installed area is warm and
humid.
6 Do not use joints or extensions for the pipes that
connect the indoor and outdoor unit. The only permitted
connections are those for which the units are designed.
Gas
refrigerant port
Drain hose
connection port
NOTE
• The designs and shape are subject to change
according to the model.
Torque (N•m)
14 ~ 18
34 ~ 42
49 ~ 61
68 ~ 82
100 ~ 120
Liquid
refrigerant port