16 Installation instructions
Kelvinator Air Conditioning
Refrigerant pipe connection
The main cause of refrigerant leakage is due to defects in the
flaring work. Carry out flaring work using the following procedure:
Note: When using refrigerant R32, a reusable flared connection is
the only allowed pipework on the outside of any building.
Hence the supplied "once only" flare fitting must be used unless all
welded connections are used. If welded connections are used, no
low temperature solder is permitted.
a. Cut the pipes and the cable
Use the piping kit accessory (if applicable) 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.
pipe
oblique
roughness
burr
90°
b. Burr removal
Completely remove all burrs from the cut cross section of pipe/
tube. 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
c. Put the flare nut on
Remove flare nuts attached to indoor and outdoor unit, then
put them on pipe/tube having completed burr removal.
flare nut
copper tube
caution
It is not possible to put them on after flaring work.
d. Flaring work
Carry out flaring work using flaring tool as shown below.
bar
copper pipe
clamp handle
cone
yoke
handle
bar
A
Firmly hold copper pipe in a die according to the dimension shown
in the table below.
Outer diameter (mm)
A (mm)
Max.
Min.
6.35 (1/4”)
1.3
0.7
9.52 (3/8”)
1.6
1.0
12.70 (1/2”)
1.8
1.0
15.88 (5/8”)
2.4
2.2
e. Check
Compare the flare work with the adjacent diagram.
If the pipe has any defect, cut off the enlarged section and
redo the work.
smooth all around
even length all
around
incorrect flaring
inclined
damaged
surface
uneven
thickness
cracked
Make an independent covering for each pipe with the
appropriate tubular isolation.
Indoor unit installation