Electrical Connection - Toshiba RAV-SM182UTP-UL Installation Manual

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.
CAUTION
• For power supply specifications, follow the Installation Manual of outdoor unit.
• Do not connect 208/230V~60Hz 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.
 System interconnection wires specifications
System
AWG 16 or more
interconnection
(H07RN-F or 60245 IEC 66)
wires*
*Number of wire × wire size
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
CAUTION
The remote controller wire and system interconnection 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.
Indoor unit Indoor unit
Remote
L
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
27-EN
Up to
229'7"(70 m)
Wire size: AWG 20 to AWG 16
In case of wired type only Up to 1640'5"(500 m)
In case of wireless type
Up to 1312'4"(400 m)
included
Up to 656'2"(200 m)
Indoor unit Indoor unit
L2 Ln
(Max. 8 units)
 Wiring between indoor unit and outdoor unit
1. Figure below shows the wiring connections between the indoor and outdoor units and between the indoor units
and remote controller. The wires indicated by the broken lines or dot-and-dash lines are provided at the locally.
2. Refer to the both indoor and outdoor unit wiring diagrams.
3. The power of the indoor unit is supplied from the outdoor unit.
Wiring diagram
Single system
Remote controller
Remote controller wiring
Indoor side
System interconnection
wires
Outdoor side
Power supply
Simultaneous triple and double twin system
Remote controller
Remote controller
inter-unit wiring
Remote controller
wiring
Indoor side
Indoor side
L1 L2 S
System
interconnection wires
Outdoor side
L1 L2 S
Power supply
* Use 2-core shield wire (MVVS AWG 20 to AWG 16) for the remote controller wiring in the
simultaneous twin simultaneous triple and simultaneous double twin systems to prevent noise problems.
Connect both ends of the shield wire to earth leads.
* Connect earth wires for each indoor unit in the simultaneous twin, simultaneous triple and simultaneous double
twin systems.
� 14 �
Simultaneous twin system
Remote controller
Remote controller
inter-unit wiring
Remote controller wiring
Indoor side
Indoor
side
System interconnection wires
Outdoor side
Power supply
Remote controller Remote controller
inter-unit wiring inter-unit wiring
Indoor side Indoor side
L1 L2 S L1 L2 S
Indoor power
Indoor power Indoor power
inter-unit wiring inter-unit wiring inter-unit wiring
Triple
Double twin
Indoor power
inter-unit wiring
EN
28-EN