8
Installation instructions
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:
Oblique
90 C
Roughness
Burr
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.
Pipe
Reamer
Face down
WARNING
caution
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.
Flare nut
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.
Refrigerant pipe connection
Outer diam. (mm)
A(mm)
Max.
Min.
φ
6.35
1.3
0.7
φ
9.53
1.6
1.0
φ
12.7
1.8
1.0
φ
16.0
2.4
2.2
Bar
Copper pipe
Clamp handle
Red arrow mark
Cone
Yoke
Handle
Bar
"A
"
Flaring tool assembly torque
Outer diam.
Tightening torque
(N.m)
Additional Tightening
Torque (N.m)
φ6.35
1.6
2.0
φ9.53
3.0
3.5
φ12.7
5.0
5.5
φ16.0
7.5
8.0
WARNING
caution
•
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
Improper flaring
Even length
all round