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7.2.4 Pipe bending guidelines
7.2.5 To flare the pipe end
RXF50~71D5V1B
R32 split series
4P519439-18T – 2022.06
a
b
c
d
a Torque wrench
b Spanner
c Piping union
d Flare nut
Piping size (mm)
Tightening torque
Ø6.4
Ø12.7
Use a pipe bender for bending. All pipe bends should be as gentle as possible
(bending radius should be 30~40 mm or larger).
CAUTION
▪
Incomplete flaring may cause refrigerant gas leakage.
▪
Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
▪
Use flare nuts that are included with the unit. Using different flare nuts may
cause refrigerant gas leakage.
1 Cut the pipe end with a pipe cutter.
2 Remove burrs with the cut surface facing down so that the chips do NOT enter
the pipe.
a
a Cut exactly at right angles.
b Remove burrs.
3 Remove the flare nut from the stop valve and put the flare nut on the pipe.
4 Flare the pipe. Set exactly at the position as shown in the following figure.
A
Flare tool for R32
(clutch type)
A
0~0.5 mm
5 Check that the flaring is properly made.
Flare dimensions
(N•m)
(A) (mm)
15~17
8.7~9.1
50~60
16.2~16.6
b
Conventional flare tool
Clutch type
(Ridgid-type)
1.0~1.5 mm
7
Piping installation
|
Flare shape (mm)
90°
±2
ØA
R=
0.4~0.8
Wing nut type
(Imperial-type)
1.5~2.0 mm
Installer reference guide
37
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