9
ENGLISH
Cutting/Flaring the pipes
1. Make sure that you have the required tools available. (pipe cutter, reamer, aring tool and pipe holder)
2. If you wish to shorten the pipes, cut it with a pipe cutter, taking care to ensure that the cut edge remains at a 90° angle with the
side of the pipe. Refer to the illustrations below for examples of edges cut correctly and incorrectly.
Oblique Rough
Burr
Pipe cutter
Pipe
3. To prevent any gas from leaking out, remove all burrs at the cut edge of the pipe, using a reamer.
4. Slide a are nut on to the pipe and modify the are.
Pipe
Flare
5. Check that the aring is correct, referring to the illustrations below for examples of incorrect aring.
Uneven
Thickness
CrackedDamaged SurfaceInclinedCorrect
6. Align the pipes and tighten the are nuts rst manually and then with a torque wrench, applying the following torque.
Outer diameter
(mm)
Connection Torque
Flare dimension (mm)
Flare shape
(mm)
kgf•cm N•m
ø 6.35 140~180 14~18 8.70~ 9.10
R 0.4~0.8
90° ±2°
45°
±2°
ø 9.52 350~430 34~42 12.80~13.20
ø 12.70 500~620 49~61 16.20~16.60
ø 15.88 690~830 68~82 19.30~19.70
• If the pipes require brazing, ensure that OFN (Oxygen Free Nitrogen) is owing through the system. If it is not
owing,Comp or valve can be damaged.
• Nitrogen blowing pressure range is 0.02 ~ 0.05MPa.
CAUTION
Outer diameter
(mm)
A(mm)
Flare tool for
R410A clutch type
Conventional flare tool
Clutch type Wing nut type
ø
6.35
0~ 0.5 1.0~ 1.5 1.5~ 2.0
ø
9.52
0~ 0.5 1.0~ 1.5 1.5~ 2.0
ø
12.70
0~ 0.5 1.0~ 1.5 1.5~ 2.0
ø
15.88
0~ 0.5 1.0~ 1.5 1.5~ 2.0
To Next Page
Loading...
