Refrigerant Pipe Connection - Kelvinator KSE88CRC Installation Manual

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
Oblique
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
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.
8 installation instructions Kelvinator Air Conditioning
Roughness Burr
Pipe
Reamer
Outer diam. (mm)
φ 6.35
φ 9.53
φ 12.7
φ 16.0
Bar
Bar
Copper pipe
Clamp handle
Tightening Connection
• Align the center of the pipes.
• Sufficiently tighten the flare nut with fingers, and
then tighten it with a spanner and torque wrench
as shown below.
Indoor unit tubing Flare nut Pipings
Tightening torque
Outer diam.
(N . m)
φ 6.35
1.6
φ 9.53
3.0
φ 12.7
5.0
φ 16.0
7.5
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
Even length
all round
A(mm)
Max. Min.
1.3 0.7
1.6 1.0
1.8 1.0
2.4 2.2
Handle
Yoke
Cone
Red arrow mark
Additional Tightening
Torque (N . m)
2.0
3.5
5.5
8.0
Improper flaring