E-
20
Installing the Refrigerant Pipe Work (Continued)
Cutting or Flaring the Pipes
1
Make sure that you have the required tools available.
(pipe cutter, reamer, flaring 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.
3
To prevent a gas leak, remove all burrs at the cut edge of the
pipe using a reamer.
Face the pipe down while removing the burrs to
make sure that burrs do not get in to the pipe.
4
Put a flare nut slightly into the pipe and modify the flare.
Outer Diameter (D)
Depth (A)
Flaring Size (B)
ø6.35 mm
1.3 mm
9.0 mm
ø9.52 mm
1.8 mm
13.0 mm
ø12.70 mm
2.0 mm
16.2 mm
ø15.88 mm
2.2 mm
19.3 mm
ø19.05 mm
2.2 mm
22.5 mm
5
Check that the flaring is correct, referring to the illustrations
below for examples of incorrect flaring.
6
Align the pipes to connect them easily. Tighten the flare nuts
first with your hands, and then with a torque wrench, applying
the following torque:
Outer Diameter
Torque (kgf•cm)
ø6.35 mm
140~170
ø9.52 mm
250~280
ø12.70 mm
380~420
ø15.88 mm
440~480
ø19.05 mm
990~1210
Note
Excessive torque can be cause of gas leakage.
Oblique
Rough
Burr
Uneven
Thickness
Cracked
Damaged
Surface
Oblique
Pipe cutter
Pipe
Pipe cutter
Pipe
Burr
Pipe
Flare
Indoor outlet pipe
Connecting pipe
Flare nut
Apply frozen oil
you must purge with oxygen free nitrogen while brazing.
RD060PHXEA_IM_E_32352A(2).indd 20
2010-07-26 ｿﾀﾈﾄ 2:19:56
