21
Installation Procedure
2 Select the insulation of the refrigerant pipe.
• Insulate the gas side and liquid side pipe referring
to the thickness according to the pipe size.
• Less than Indoor temperature of 86℉(30℃) and
humidity of 85% is the standard condition. If
installing in a high humidity condition, use one
grade thicker insulator by referring to the table
below. If installing in an unfavourable conditions,
use thicker one.
• Insulator’s heat-resistance temperature should be
more than 248℉(120℃).
Pipe
Outer diameter
Insulation Type
(Cooling, Heating)
Remarks
General
[86°F(30°C),
85%]
High humidity
[86°F(30°C),
over 85%]
EPDM,NBR
mm inch mm inch mm inch
Liquid
pipe
6.35~9.52 1/4~3/8 9 3/8 9 3/8
Heating
resisting
temperature
over
248°F(120°C)
12.7~50.80 1/2~2 13 1/2 13 1/2
Gas
pipe
6.35 1/4 13 1/2 19 3/4
9.52~25.4 3/8~1 19 3/4 25 1
28.58~44.45
1 1/8~1
3/4
19 3/4 32 1 1/4
50.8 2 25 1 38 1 1/2
• When installing insulation in places and
conditions below, use the same insulation that is
used for high humidity conditions.
<Geological condition>
– High humidity places such as shoreline, hot spring,
near lake or river, and ridge (when the part of the
building is covered by earth and sand.)
<Geological condition>
– Restaurant ceiling, sauna, swimming pool etc.
– <Building construction condition>
– The ceiling frequently exposed to moisture and
cooling is not covered.
– e.g. The pipe installed at a corridor of a dormitory
and studio or near an exit that opens and closes
frequently.
– The place where the pipe is installed is highly
humid due to the lack of ventilation system.
Step 13 Checking the earthing
If the power distribution circuit does not have a earthing
or the earthing does not comply with specifications, an
earthing electrode must be installed. The corresponding
accessories are not supplied with the air conditioner.
1 Select an earthing electrode that complies with the
specifications given in the illustration.
2 Connect the flexible hose to the flexible hose port.
• In damp hard soil rather than loose sandy or
gravel soil that has a higher earthing resistance.
• Away from underground structures or facilities,
such as gas pipes, water pipes, telephone lines
and underground cables.
• At least 6.6 ft away from a lightening conductor
earthing electrode and its cable.
NOTE
• The earthing wire for the telephone line cannot be
used to ground the air conditioner.
Carbon plastic
19.69inch(50cm)
PVC-insulated
green/yellow
wire
To grounding screw
Steel core
11.81inch
(30cm)
Terminal M4
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 Install a green/yellow color earthing wire:
• If the earthing wire is too short, connect an
extension lead in a mechanical way and wrap it
with insulating tape (do not bury the connection).
• Secure the earthing wire in position with staples.
NOTE
• If the earthing electrode is installed in an area with
heavy traffic, its wire must be connected securely.
5 Carefully check the installation by measuring the
earthing resistance with a earth resistance tester. If
the resistance is above the required level, drive the
electrode deeper into the ground or increase the
number of earthing electrodes.
6 Connect the earthing wire to the electrical component
box inside of the outdoor unit.
DB68-11579A-00_IM_RAC oudoor_AA_EN_.indd 21DB68-11579A-00_IM_RAC oudoor_AA_EN_.indd 21 2022-01-12 오후 1:37:522022-01-12 오후 1:37:52
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