16
Indoor Unit Installation
English
Installation
NOTE
࡛ If you are using the right rear exit, the pipes should be
long enough to extend through the wall without needing
to connect the line set first. It may be easier to connect
the line set outside of the building, after you have
bundled the pipes and cables and passed the bundle
through the wall. In this case, do not connect the line set
now. Instead, complete Step 2-5 through Step 2-9, then
go outside and connect the line set as described below.
4 Slowly remove the protective caps on the refrigerant pipe
connections to relieve the nitrogen holding charge.
5 Connect the line set to each pipe.
Indoor outlet pipe Connecting pipe
Flare nut
6 Hand-tighten the flare nuts to make sure that they do not
become stripped.
Liquid service port
<High pressure>
Gas service port
<Low pressure>
7 Torque the flare connections to the following values:
Outer diameter Torque ft·lb (N·m)
1/4 inch (6.35 mm) 10.1–13.0 (14–18)
3/8 inch (9.52 mm) 25.3–31-1 (34–42)
1/2 inch (12-70 mm) 36.2–44.8 (49–61)
5/8 inch (15.88 mm) 49.9–60.0 (68–82)
CAUTION
࡛ Tighten the flare nuts only to the specified torque. If
a flare nut is overtightened, the flare face may crack,
causing refrigerant leakage.
8 Do not box in or cover the pipe connections. Make sure
that the connections are accessible for testing later in the
installation process and for future servicing.
9 Tape over the end of the pipes so that debris will not enter
the piping when it is passed through the wall. The pipes
will be insulated later in the installation process.
Step 2-4 Connecting the power and
communication cables
If using a multi system,install as described in the
installation manual supplied with the outdoor unit.
WARNING
࡛ Do not modify the power cable in any way. Doing so may
cause electric shock or fire due to poor connection, poor
insulation, or current limit override. Make sure to comply
with the technical standards of electrical installations and
the wiring regulations in the local area.
࡛ This appliance must be properly grounded. Do not
ground the appliance to a gas pipe, plastic water pipe,
or telephone line. Failure to comply may result in
electric shock, fire, and explosion.
1 Connect each wire to its corresponding terminal number.
Cable Terminals
Power cable L1, L2, ground
Communication cable F1, F2
Control box
Before
connecting
Correct
Upside
down
Damaged
Non-
circular
After
connecting
Correct
(Front
view)
Correct
(Side view)
Upside
down
Non-fitted
<Circular terminal>
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