15
English
Instal
lation Pr
oc
edur
e
Pipe cutter
Pipe
Oblique
Rough
Burr
3
To prevent any gas from leaking out, remove all burrs
at the cut edge of the pipe, using a reamer.
4
Slide the flare nuts onto the pipes, then flare each
pipe.
Pipe
Flare
D
A
Flare
R 0.4 to 0.8 mm
D
L
90
° ±2°
45
° ±
2°
(0.016 to 0.032 inch)
Outer Diameter (D)
Depth (A)
Flare dimension (L)
mm
inch
mm
inch
mm
inch
Ø6.35
1/4
1.3
0.051
8.7 to 9.1
0.34 to 0.36
Ø9.52
3/8
1.8
0.071
12.8 to 13.2
0.50 to 0.52
Ø12.70
1/2
2.0
0.079
16.2 to 16.6
0.64 to 0.65
Ø15.88
5/8
2.2
0.087
19.3 to 19.7
0.76 to 0.78
Ø19.05
3/4
2.2
0.087
23.6 to 24.0
0.93 to 0.94
5
Check that the flaring is correct, referring to the
illustrations below for examples of incorrect flaring.
Correct
Inclined
Damaged
Surface
Cracked
Uneven
Thickness
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 two pinch pipes and connect the field
refrigerant pipes. Tighten the flare nuts, first manually
and then with a torque wrench and a backup wrench
applying the following torque.
Torque
wrench
Flare nut
Spanner
Union
1
2
3
3
Outer Diameter (mm)
Torque
mm
inch
N‧m
lbf.ft
Ø6.35
1/4
14 to 18
10.3 to 13.3
Ø9.52
3/8
34 to 42
25.1 to 31.0
Ø12.70
1/2
49 to 61
36.1 to 45.0
Ø15.88
5/8
68 to 82
50.2 to 60.5
Ø19.05
3/4
100 to 120
73.8 to 88.5
(1N‧m=10kgf‧cm)
DB68-11272A-00_IM_CAC WindFree1,4way_AA_EN_.indd 15
DB68-11272A-00_IM_CAC WindFree1,4way_AA_EN_.indd 15
2021-09-17 오후 12:14:15
2021-09-17 오후 12:14:15
