Instruction manual

19
1. pipe cutting
Use pipe cutter to cut the copper
pipe correctly
qualified
Copper pipe 90
Unqualified
Burr
tilted rugged
Copper pipe
Pipe cutter
2.remove burrs
Get rid all the burrs of the pipes
section.
Burr
3.install the nut
Remove the connecting nut which is
installed on the indoor unit and outdoor
unit, after rid the pipe of burrs, install it
on the pipe again.
Connecting nut
Copper pipe
4. Flare work
Use the follow instruments to undertake
flare work.
Die
yoke die
Copper pipe
Connecting
nut
Tilted
Flare instrumen
5. Check
Compare the flare work with the following
diagrams.
The flared part should be cut off and flared again
if there are some deficiencies of the flare work.
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Over flared
Even Broken Rugged
Copper pipe
External diameter(mm)
1/4
3/8
1/2
5/8
A(mm)
0.8~1.5
1.2~1.8
1.2~2.0
1.5~2.5
1. Connection of the indoor unit.
Connect the thick and thin pipes to the indoor unit.
Apply a thin coat of refrigerating oil on the pipes joints. When connecting, screw the
centre and then screw the first 3-4 turns of the connecting nut by hand. Use the wring
torque diagram as the standard of indoor pipe’s connection, use two spanners to tighten
them; over-tightening will damage the flared joint
.
External diameter(mm)
1/4
3/8
1/2
5/8
Wring torque(kgfcm)
150~210
380~450
400~460
500~575
2. Connection of outdoor unit.
Proceed the same way as the indoor unit.
Connect the pipes with the outdoor unit’s valve. Use a spanner to grip the
valve and use the torque spanner to grip the connecting nut.
Connect the pipe to outdoor unit with the same wring torque as used for the
indoor unit.
Caution: Proper insulation thickness. If the insulation is too thick, it could cause an
accumulation of water behind the indoor unit. If the insulation is too thin it could cause
moisture and water dripping.
3-3 Drain Hose
To drain the water, please incline the drain hose downwards (diagram 1). Do not install
as shown on diagram 2~5.