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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 earthing 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
• For power supply specifications, follow the Installation Manual of outdoor unit.
• 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 system interconnection wires
during 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 specifi cations
Indoor / Outdoor connecting wires specifications
Indoor unit power supplied from outdoor unit
• The outdoor unit power supply patterns vary on models.
1~50 Hz
Indoor unit power supply
1~60 Hz
Indoor / Outdoor connecting wires*
4 × 1.5 mm² or more (H07 RN-F or 60245 IEC 66)*
*Number of wire x wire size
*Including earth line
Remote controller wiring
Remote controller wiring, remote controller inter-unit wiring
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + ... Ln
Total wire length of remote controller inter-unit wiring = L1 + L2 + ... Ln
* 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.
27-EN
220 - 240V
220V
Up to 70 m
Wire size: 2 × 0.5 to 2.0 mm
2
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
Up to 200 m
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
Indoor unit
RAV-HM
series model
RBC-A
U
Wired remote
controller
This letter indicates U series model.
Wireless remote
RBC-AXU
controller kit &
receiver unit
This letter indicates U series model.
TCB-TC
U
Remote sensor
This letter indicates U series model.
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".
Indoor unit
Remote
L
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
Max. number of connect-able indoor units, and communication type
Indoor unit
RAV-HM
Remote controller
Remote sensor
Communication type
Max. number of connect-able
units
: Other than RAV-HM
and U series
– 14 –
TU2C-Link
TCC-Link
Other than RAV-HM
Other than U series
Other than U series
Other than U series
Indoor unit
Indoor unit
L2
Ln
For number of Max. connectable units,
refer to the following table.
Unit type
RAV-HM
U series
U series
TU2C-Link
TCC-Link
16
8
series
Indoor unit
EN
28-EN
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