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Installation Procedure
English
Installation Procedure
CAUTION
• When insulating the pipe, use non-slit insulator.
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 30°C 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 120°C.
Pipe
Pipe size
(mm)
Insulation Type
(Heating/Cooling)
Remarks
Standard
[Less than
30°C, 85%]
High
humidity
[over 30°C,
85%]
EPDM, NBR
Liquid
pipe
Ø6.35~Ø9.52 9 t 9 t
Internal
temperature
is higher
than 120°C
Ø12.7~Ø19.05
13 t 13 t
Gas pipe
Ø6.35 13 t 19 t
Ø9.52~Ø19.05
19 t 25 t
• 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.)
<Operation purpose 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 two metres 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.
50 cm
30 cm
Carbon plastic
To grounding screw
Steel core
Terminal M4
PVC-insulated
green/yellow
wire
3 Finish wrapping insulating tape around the rest of the
pipes leading to the outdoor unit.
4 Install a green/yellow coloured 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.
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