Step 7 Connecting The Assembly Pipes To The Refrigerant Pipes - Samsung AM***NN1DCH series Installation Manual

Installation Procedure
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
Outer Diameter (mm)
mm inch
Ø6.35 1/4
Ø9.52 3/8
Ø12.70 1/2
Ø15.88 5/8
Ø19.05 3/4
10
English
• If the pipes must be shortened, see Step 6 Cutting
2 Be sure to use an insulator thick enough to cover the
3 Cut off any excess foam insulation.
4 Make sure that there are no cracks or waves on the
5 It would be necessary to double the insulation
6 Do not use joints or extensions for the pipes
2
• Connect the indoor and outdoor units using pipes
Torque
wrench
3
• For sizing and limits (height difference, line length,
Flare nut
• All refrigerant connection must be accessible, in order
Torque (N m)
mm lbf.ft
• If the pipes require brazing, make sure that oxygen
14 to 18 10.3 to 13.3
• Nitrogen blowing pressure range is 0.02 to 0.05 MPa
34 to 42 25.1 to 31.0
49 to 61 36.1 to 45.0
68 to 82 50.2 to 60.5
100 to 120 73.8 to 88.5
NOTE
and flaring the pipes on page 9.
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.
bent area.
thickness (10 mm (3/8 inch) or more) to prevent
condensation even on the insulator when if the
installed area is warm and humid.
connecting the indoor and outdoor units. The only
permitted connections are those for which the units
are designed.
CAUTION
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
4.2MPa (609.2 psig) and for a burst pressure of at least
20.7MPa (3002.3 psig). Copper pipe for hydro-sanitary
applications is completely unsuitable.
max. bends, refrigerant charge, etc.) see the outdoor
unit installation manual.
to permit either unit maintenance or removing it
completely.
free nitrogen (OFN) is flowing through the system.
(2.9 to 7.3 psig).