38
English
Ins
tallation
NOTE
•
The pipe will be insulated and fixed permanently into
position after finishing the installation and the gas leak
test. For further details. see
Step 4.1 Performing the
gas leak tests
on page
43
.
CAUTION
•
Tighten the flare nut with a torque wrench according
to specified method. If the flare nut is over-tightened,
the flare may break and cause refrigerant gas leakage.
•
Do not box in or cover the pipe connection. All
refrigerant pipe connection must be easily accessible
and serviceable.
Step 2.7 Shortening or extending the
refrigerant pipes (assembly pipe)
Pipe cutter
Pipe
Oblique
Rough
Burr
90°
R 0.4 to 0.8
90°±2°
45°±2°
L
D
D
A
Indoor outlet pipe
Flare nut
(Unit: mm)
Outer diameter (mm)
Torque (N•m)
Torque (kgf•cm)
ø 6.35
14 to 18
140 to 180
ø 9.52
34 to 42
350 to 430
ø 12.70
49 to 61
500 to 620
ø 15.88
68 to 82
690 to 830
Connecting pipe
CAUTION
•
If you need a pipe longer than specified in piping
codes and standards, you must add refrigerant to the
pipe. Otherwise, the indoor unit may freeze.
•
While removing burrs, put the pipe face down to make
sure that the burrs do not get in to the pipe.
<Flare nut>
Liquid service port
<High pressure>
Gas service port
<Low pressure>
Correct
Inclined
Cracked
Uneven
thickness
Damaged
surface
(Unit: mm)
Outer diameter (D)
Depth (A)
Flare dimension (L)
ø 6.35
1.3
8.7 to 9.1
ø 9.52
1.8
12.8 to 13.2
ø 12.70
2.0
16.2 to 16.6
ø 15.88
2.2
19.3 to 19.7
Pipe
Flare
Indoor Unit Installation
RAC MEDIA ODM 아프리카향 IBIM_EN_DB68-00000A-00.indb 38
2017-01-20 오전 11:28:44