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3.3.1 Flaring work
Main cause for refrigerant leakage is due
to defect in the flaring work.
Carry out correct flaring work using the
following procedure:
1. Cut the pipes and the cable.
• Use the piping kit accessory or pipes
purchased locally.
• Measure the distance between the
indoor and the outdoor unit.
• Cut the pipes a little longer than the
measured distance.
• Cut the cable 1.5m longer than the pipe
length.
Fig.3.3.1-1
Pipe
Oblique
2. Burr removal
• Completely remove all burrs from the
cut cross section of pipe/tube.
• Put the end of the copper tube/pipe in
a downward direction as you remove
burrs in order to avoid dropping burrs
into the tubing.
Fig.3.3.1-2
Face Down
Roughness
Burr
Pipe
Reamer
3. Put nut on
• Remove flare nuts attached to indoor
and outdoor unit, then put them on
pipe/tube after completed burr removal.
(It is not possible to put them on after
flaring work.)
Fig.3.3.1-3
Flare Nut
Copper Tube
4. Flaring work
• Carry out flaring work using flaring tool
as shown below.
Fig.3.3.1-4
Bar
Bar
Clamp Handle
• Firmly hold copper pipe according
to the dimension shown in the table
below.
Outer diam. (mm)
Ф6.35 (1/4")
Ф9.52 (3/8")
Ф12.70 (1/2")
Ф15.88 (5/8")
ENGLISH
11
Copper
Pipe
Handle
Yoke
Cone
Red arrow
mark
A (mm)
Max.
Min.
1.3
0.7
1.6
1.0
1.8
1.0
2.4
2.2
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