10
Indoor Unit Installation
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 2-4 through
Step 2-7, 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 (mm) Torque (N·m)
ø 6.35 14–18
ø 9.52 34–42
ø 12.70 49–61
ø 15.88 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.
• Make sure that cabling is not subject to wear, corrosion,
excessive pressure, vibration, sharp edges, or adverse
environmental effects. Take into account the effects of aging or
continual vibration from sources such as compressors or fans.
1 Connect each wire to its corresponding terminal number.
Model
AC026/035/052TNXDKG AC071TNXDKG
Power cable
(Outdoor unit)
3G X 2.5 mm², H05RN-F
3G X 2.5 mm²,
H05RN-F
Outdoor-to-
indoor power
cable
3G X 0.75~1 mm²,
H05RN-F
3G X 0.75~1 mm²,
H05RN-F
Communication
cable
3G X 0.75 mm²,
H05RN-F
3G X 0.75 mm²,
H05RN-F
Type GL
16 A 20 A
DB68-08947A-00_IM_CAC QMD_EU_EN_.indd 10 2020-02-10 오전 11:14:28
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