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Refrigerant piping
Connection
by hand.
CAUTION
•
Ensure to wrap insulation around the piping.
Direct contact with the bare piping 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.
NOTE ON MINIMUM BEND RADIUS
Carefully bend the tubing 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
min-radius 10cm (3.9”)
6.
After connecting the copper pipes to the indoor
unit, wrap the power cable, signal cable and the
piping together with binding tape.
NOTE: DO NOT
intertwine signal cable with
other wires. While bundling these items
together, do not intertwine or cross the signal
cable with any other wiring.
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. Align the center of the two pipes that you
will connect.
Indoor unit tubing
Flare nut Pipe
2. Tighten the flare nut as tightly as possible
3. Using an adjustable wrench, grip the nut on
the unit tubing.
4. While firmly gripping the nut, use a torque
wrench to tighten the are nut according
to the torque values in the table.
NOTE:
Use both an adjustable wrench and a
torque wrench when connecting or
disconnecting pipes to/from the unit.
7. Thread this pipeline through the wall and
connect it to the outdoor unit.
8. Insulate all the piping, including the valves of
the outdoor unit.
9. Open the stop valves of the outdoor unit to
start the
ow of the refrigerant between the
indoor and outdoor unit.
CAUTION
Check to make sure there are no refrigerant
leaks after completing the installation work.
If there is a refrigerant leak, ventilate the area
immediately and evacuate the system (refer
to the Air Evacuation section of this manual).
