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Refrigerant pipe connection
1
Flaring work
Main cause for refrigerant leakage is due to defects in the flaring
work. Carry out correct flaring work using the following procedure:
90 C
A: Cut the pipes and the cable.
1.
Use the piping kit accessory (if applicable) or pipes purchased locally.
2.
Measure the distance between the indoor and the outdoor unit.
3.
Cut the pipes a little longer than the measured distance.
4.
Cut the cable 1.5m longer than the pipe length.
B:
Burr removal
1.
Completely remove all burrs from the cut cross section
of pipe/tube.
2.
Face the end of the copper pipe/tube in a downward
direction as you remove burrs in order to avoid burrs
dropping into the tubing.
Face down
caution
WARNING
C: Putting flare nut on
Remove flare nuts attached to indoor and outdoor unit,
then put them on pipe/tube having completed burr removal
Note: It is not possible to put them on after flaring work.
Copper tube
D: Flaring work
•
Carry out flaring work using flaring tool as shown below.
•
Firmly hold copper pipe in a die according to the dimension
shown in the table below.
8
Installation instructions
Oblique
Roughness
Pipe
Reamer
Flare nut
Outer diam. (mm)
φ 6.35
φ 9.53
Burr
φ 12.7
φ 16.0
Bar
Flaring tool assembly torque
Outer diam.
φ6.35
φ9.53
φ12.7
φ16.0
caution
WARNING
•
Excessive torque can break nut depending on installation
conditions.
E:
Check
•
Compare the flared work with the adjacent diagram.
•
If flare is found to be defective, cut off the flared section and
do flaring work again.
Smooth all round
Max.
1.3
1.6
1.8
2.4
Bar
Copper pipe
Clamp handle
Red arrow mark
Tightening torque
(N.m)
1.6
3.0
5.0
7.5
Improper flaring
Even length
all round
A(mm)
Min.
0.7
1.0
1.0
2.2
Handle
Yoke
Cone
Additional Tightening
Torque (N.m)
2.0
3.5
5.5
8.0
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