1-8
REMOVE BURR
SPANAR
TORQUE WRENCH
INDOOR PIPING
FLARE NUT
FLARED TUBE
FLARE JOINT
COPPER TUBE
SWAGING BLOCK
Ø TUBE
A (mm)
Inch
mm
Imperial
Rigid
1/4"
6.35
1.3
0.7
3/8"
9.52
1.6
1.0
1/2"
12.70
1.9
1.3
5/8"
15.88
2.2
1.7
3/4"
19.05
2.5
2.0
CUTTING COPPER TUBE
PIPING CONNECTION TO THE UNITS
•
Align the center of the piping and tighten the flare nut
sufficiently with fingers.
•
Finally, tighten the flare nut with the torque wrench
until the wrench clicks.
PIPE SIZE (mm/in)
TORQUE (Nm)
6.35 (1/4)
18
9.53 (3/8)
42
12.7 (1/2)
55
15.88 (5/8)
65
19.05 (3/4)
78
•
If any brazing work is required, ensure that the nitrogen
gas is passed through coil and joints while the brazing
work is being done. This will eliminate soot formation
on the inside walls of the copper tubings.
•
Cut the connection pipe with a pipe cutter.
•
Remove burrs from cut edges of the pipes with remover.
Hold the end of the pipe downwards to prevent metal
chips from entering the pipe.
•
Insert the flare nuts, mounted on the connection parts of
both the indoor unit and outdoor unit onto the copper
pipes.
•
Flare the pipe with extra length above the flaring tool as
shown in the table.
•
The flared edge must be even and not cracked or
scratched.
PIPING WORKS
•
Do not use contaminated or damaged copper tubing. Do not remove plastic, rubber plugs and brass nuts from the valves,
fittings, tubings and coils until you are ready to connect suction or liquid line into valves or fittings.
1/4t
CED1099 (01~09/E)
2/1/01, 3:47 PM
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