– 17 –
8
Earthing
WARNING
Be sure to connect the earth wire. (grounding work)
Incomplete grounding may cause an electric shock.
Connect the earth wire properly following applicable technical standards.
Connecting the earth wire is essential to preventing electric shock and to reducing noise and electrical charges on
the outdoor unit surface due to the high-frequency wave generated by the frequency converter (inverter) in the
outdoor unit.
If you touch the charged outdoor unit without an earth wire, you may experience an electric shock.
9
Finishing
After the refrigerant pipe, inter-unit wires, and drain pipe have been connected, cover them with finishing tape and
clamp them to the wall with off-the-shelf support brackets or their equivalent.
Keep the power wires and system interconnection wires off the valve on the gas side or pipes that have no heat
insulator.
10
Test run
• Turn on the leakage breaker at least 12 hours before starting a test run to protect the compressor during
startup.
To protect the compressor, power is supplied from the
380
-
415
VAC input to the unit to preheat the compressor.
• Check the following before starting a test run:
•
That all pipes are connected securely without leaks.
•
That the valve is open.
If the compressor is operated with the valve closed, the outdoor unit will become overpressurized, which may
damage the compressor or other components.
If there is a leak at a connection, air can be sucked in and the internal pressure further increases, which may
cause a burst or injury.
• Operate the air conditioner in the correct procedure as specified in the Owner’s Manual.
11
Annual maintenance
For an air conditioning system that is operated on a regular basis, cleaning and maintenance of the indoor / outdoor
units are strongly recommended.
As a general rule, if an indoor unit is operated for about 8 hours daily, the indoor / outdoor units will need to be
cleaned at least once every 3 months. This cleaning and maintenance should be carried out by a qualified service
person.
Failure to clean the indoor / outdoor units regularly will result in poor performance, icing, water leaking and even
compressor failure.
(4 x 1.5 mm
2
or more)
1. Remove the mounting screws (2 pieces), open the
electrical control box cover.
2. Connect the power supply wires and system
interconnection wires to the terminal block of the
electrical control box.
3. Tighten the screws of the terminal block, connect
the wires matching the terminal numbers (Do not
apply tension to the connecting section of the
terminal
block.)
4. Close the electrical control box cover, attach the
mounting
screws.
:KHQFRQQHFWLQJWKHV\VWHPLQWHUFRQQHFWLRQZLUH
to the outdoor unit terminal, prevent water from
coming into the outdoor unit.
,QVXODWHWKHXQVKHDWKHGFRUGVFRQGXFWRUVZLWK
electrical insulation tape. Process them so that
they do not touch any electrical or metal parts.
)RUV\VWHPLQWHUFRQQHFWLRQZLUHVGRQRWXVHD
wire joined to another on the way.
Use wires long enough to cover the entire length.
How to wire
7R,QGRRUXQLW
terminal block
Power supply
terminal block
Stripping length power cord and
connecting wire
Earth wire
Earth wire
Power supply
Connecting line
A
B
1
2
3
1
2
3
L1(R)
N
L2(Y)
L3(B)
)R
r the air conditioner, connect a power wire with the
following specifications.
Wiring diagram
*
)
or details on the remote controller wiring /
installation, refer to the
,
nstallation Manual enclosed
with the remote controller.
Single system
Simultaneous twin system
* Use 2-core shield wire (MVVS 0.5 to 2.0 mm² or
more) for the remote controller wiring in the
simultaneous twin system to prevent noise
problems. Be sure to connect both ends of the shield
wire to earth leads.
* Connect earth wires for each indoor unit in the
simultaneous twin system.
Model RAV-
GM110, GM140
Power supply
380-415V 3N~, 50Hz
380V 3N~, 60Hz
Maximum running current
14.10 A
Installation fuse rating
20 A (all types can be used)
Power supply wire
H07 RN-
)
or 60245
,
EC 66
(5 x 2.5 mm
2
or more)
System interconnection
wires
H07 RN-
)
or 60245
,
EC 66
Remote controller
Power supply
Remote controller wiring
,QGRR
r side
System interconnection
wires
Outdoor side
Remote controller
Power supply
Remote controller
wiring
,QGRR
r side
System
interconnection wires
Outdoor side
Remote
controller
inter-unit
wiring
,QG
oor
side
,
ndoor
power
inter-unit
wiring
A
B
1
2
3
1
2
3
1
2
3
A
B
L1(R)
N
L2(Y)
L3(B)
Earth screw
Pipe valve
fixing plate
System
interconnection
wire
Power supply wire
Earth screw
33-EN
34-EN
