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5 Installation
Step 4: Connect pipes
Connect the copper pipes to the indoor
unit first, then connect it to the outdoor
unit. You should first connect the low-
pressure pipe, then the high-pressure
pipe.
1. When connecting the flare nuts, apply
a thin coat of refrigeration oil to the
flared ends of the pipes.
2. Align the center of the two pipes that
you will connect.
Indoor unit tubing
Indoor unit tubing
3. Tighten the flare nut as tightly as
possible by hand.
4. Using a spanner, grip the nut on the
unit tubing.
5. While firmly gripping the nut, use a
torque wrench to tighten the flare
nut according to the torque values in
above table.
Use both a spanner
C
and a torque wrench
when connecting or
disconnecting pipes to/
from the unit.
Multi Split Type Air Conditioner / User Manual
Flare nut
Pipe
Flare nut
Pipe
CAUTION!
• Ensure to wrap
insulation around the
piping. Direct contact
with the bare piping
A
may result in burns or
frostbite.
• Make sure the pipe is
properly connected.
Over tightening may
damage the bell mouth
and under tightening
may lead to leakage.
Carefully bend the tubing
C
in the middle according
to the diagram below.
DO NOT bend the tubing
more than 90° or more
than 3 times.
Bend the pipe with thumb
Bend the pipe with thumb
min-radius 10cm (3.9")
min-radius 10cm (3.9")
37 / EN
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