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7 Electrical connection
WARNING
• Use the specified wires for wiring connect the terminals. Securely fix them to prevent external forces
applied to the terminals from affecting the terminals.
Incomplete connection or fixation may cause a fire or other trouble.
• Connect earth wire. (grounding work)
Incomplete grounding cause an electric shock.
Do not connect earth wires to gas pipes, water pipes, lightning conductor or telephone earth wires.
• Appliance shall be installed in accordance with national wiring regulations.
Capacity shortage of power circuit or incomplete installation may cause an electric shock or a fire.
• Under no circumstances, the power supply wire or the indoor and outdoor connecting wire must not be
connected in the middle (Connection using a solderless terminal etc.)
Connection trouble in the places where the wire is connected in the middle may give rise to smoking and/or a fire.
CAUTION
• Do not connect 220–240V power to the terminal blocks (A , B) for control wiring.
Otherwise, the system will fail.
• Do not damage or scratch the conductive core and inner insulator of power and Indoor/Outdoor connecting wires
when peeling them.
• Perform the electric wiring so that it does not come to contact with the high-temperature part of the pipe.
The coating may melt resulting in an accident.
• Do not turn on the power of the indoor unit until vacuuming of the refrigerant pipes completes.
■ Wiring specifications
Indoor / Outdoor connecting wires specifications
Indoor unit power supplied from outdoor unit
• The outdoor unit power supply patterns vary on models.
Indoor unit power supply
1~50 Hz 220 - 240V
1~60 Hz 220V
Indoor / Outdoor connecting wires* 4 x 1.5 mm
2
or more (H07RN-F or 60245 IEC 66)* Up to 70 m
*Number of wire x wire size
*Including earth line
Remote controller wiring
Remote controller wiring, remote controller inter-unit wiring Wire size: 2 x 0.5 to 2.0 mm
2
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + … Ln
In case of wired type only Up to 500 m
2 remote controllers Up to 300 m
In case of wireless type included Up to 400 m
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln Up to 200 m
* The remote controller wiring length differs depending on the remote controller used. For details, refer to the Installation Manual
attached to the remote controller.
CAUTION
The remote controller wire and Indoor/Outdoor connecting wires cannot be parallel to contact each other and
cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system due to noise or
other factor.
■ Communication type
TU2C-Link can be used with these models.
If the indoor unit and the connected remote controller / remote sensor are all TU2C-Link models, TU2C-Link
communication will be performed automatically.
(If the TCC-Link model is included, TCC-Link communication will be performed.)
For details of communication type, refer to the following table.
Communication type and model names
Communication type TU2C-Link TCC-Link
Indoor unit
RAV-HM ½½½ series model Other than RAV-HM ½½½ series
Wired remote
controller
RBC-A½½U½½½
Ç
This letter indicates U series model.
Other than U series
Wireless remote
controller kit &
receiver unit
RBC-AXU½½½
Ç
This letter indicates U series model.
Other than U series
Remote sensor
TCB-TC½½U½½½
Ç
This letter indicates U series model.
Other than U series
CAUTION
When connecting to the central control device dedicated to TCC-Link, it is necessary to change to TCC-Link
using a wired remote controller. Set according to the Communication type procedure of “8 Applicable controls”.
L1
L
nL2L
Indoor unit
Remote
controller
Indoor unit
Indoor unit Indoor unit
Remote
controller
wiring
Remote controller inter-unit wiring
For number of Max. connect-able units,
refer to the following table.
Max. number of connect-able indoor units, and communication type
Unit type
Indoor unit
RAV-HM½½½ RAV-HM½½½ ½ ½
Remote controller
Remote sensor
U series
½
U series
½
Communication type TU2C-Link TCC-Link
Max. number of connect-able
units
16 8
½: Other than RAV-HM½½½ and U series
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