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Remote control wiring
2-core with non-polarity wire is used for wiring of the remote control wiring and group remote controls wiring.
Remote control wiring, remote control inter-unit wiring
Total wire length of remote control wiring and remote control
inter-unit wiring = L + L1 + L2 + ... Ln
Total wire length of remote control inter-unit wiring = L1 + L2 + ... Ln
CAUTION
• The remote controller wire (Communication line) and AC 208-230V 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.
• If U series models (TU2C-Link) are combined with models other than U series (TCC-Link), the wiring
specifications and maximum number of connectable indoor units will be changed. Pay attentions to their
communication specifications when carrying out the installation, maintenance, or repair. For its details, refer to
the "Communication line" in 7 Electrical connection.
Indoor unit
Indoor unit
Remote
L
control
L1
wiring
Remote
Remote control inter-unit wiring
control
Max. number of connectable indoor units, and communication type
Outdoor unit
U series
Indoor unit
U series
Remote controller
U series
Communication type
TU2C-Link
Max. number of connectable unit
16
*
: Other than U series
NOTE
• Use copper supply wire.
• Use UL wire rated 600V for the power supply.
• Use UL wire rated 300V for the remote control wires and control wires.
CAUTION
The remote control wire (Communication line) and AC 208/230V 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.
31-EN
Wire size: AWG20
In case of wired type only
Up to 1640'5" (500 m)
In case of wireless type included
Up to 1312'4" (400 m)
Up to 656'2" (200 m)
Indoor unit
Indoor unit
L2
Ln
For number of max. connectoble
units, refer to the following fable.
Unit type
*
*
U series U series U series
*
*
U series
U series U series
*
*
*
U series
U series
U series
TCC-Link
8
Wire connection
REQUIREMENT
• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Be sure to pass the wires through the bushing of wiring connection port of the indoor unit.
• Keep a margin (Approx. 3.9" (100 mm) on a wire to hang down the electrical control box at servicing, etc.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
• Make a loop on the wire for margin of the length so that the electrical control box can be taken out during servicing.
1. Remove screw A for the fixation of the electrical control box cover and loosened screw B. Slide the cover inside
so that the hook part can be removed (The electrical control box cover remain being hooked on the hinge.)
2. Remove the wiring cover mounting (1 locations), and a wiring cover is removed.
3. Connect the power supply wire and remote controller wire to the terminal block of the electrical control box.
4. Tighten the screws of the terminal block,and fix the wires with cord clamp attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
5. Using the attached heat insulation material, seal the pipe connecting port. Otherwise, dewing may be caused.
6. Mount the cover of the electrical control box without pinching wires.
(Mount the cover after wiring on the ceiling panel.)
Side D (Space: 0.3" (8.5 mm))
* Cable clamp can be attached on left side.
Wire
Specification
type
Cabtyre
3-core stranded
cable
wire AWG14
Cabtyre
4-core stranded
cable
wire AWG16
Power supply terminal block
*
*
*
*
*
– 16 –
Screws A
Side C (Space: 0.2" (4 mm))
Hinge
Cable clamping
position
Side D
Screws
Wiring cover
Side C
Indoor / Outdoor
inter-unit wire /
Remote
controller
terminal block
Cord clamp
Screws B
Hook section
Cover of the electrical
control box
Screws in 2 positions
Louver connector
(CN510: White)
Hinge
EN
Grourlding wire
Power supply wire
32-EN
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