Step 7 Connecting The Assembly Pipes To The Refrigerant Pipes - Samsung AC-Series-KN4*EH Installation Manual

5 Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Correct Inclined
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 and 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.
1
Spanner
3
Union
360_AC_Indoor_IM_AU_ENG_EN.indb 11
Damaged Cracked Uneven
Thickness
Surface
2
Torque
wrench
3
Flare nut
Outer diameter (mm)
Ø6.35
Ø9.52
Ø12.70
Ø15.88
Ø19.05
NOTE
• If the pipes must be shortened, see Step 6 Cutting and
flaring the pipes on page 10.
2 Be sure to use an insulator thick enough to cover the
refrigerant tube to protect the condensate water on the
outside of the pipe falling onto the floor and to improve
the efficiency of the unit.
3 Cut off any excess foam insulation.
4 Make sure that there are no cracks or waves on the bent
area.
5 It would be necessary to double the insulation thickness
(10 mm or more) to prevent condensation even on the
insulator when if the installed area is warm and humid.
CAUTION
• 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 or UNI EN 12735-1),
suitable for operating pressures of at least 4.2 MPa and
for a burst pressure of at least 20.7 MPa. 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.
• If the pipes require brazing, make sure that oxygen free
nitrogen (OFN) is flowing through the system.
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa.
Torque (N•m)
14 to18
34 to 42
49 to 61
68 to 82
100 to 120
(1 N•m=10 kgf•cm)
11
English
2016-05-13 오후 5:01:37