Toshiba RAV-SM2244AT7 Using the specified wires, ensure that the wires are, Part of the terminals

Digital Inverter

7 ELECTRICAL WORK

WARNING

1.	Using the specified wires, ensure that the wires are
	connected, and fix wires securely so that the external
	tension to the wires does not affect the connecting
	part of the terminals.
	Incomplete connection or fixation may cause a fire, etc.
2.	Be sure to connect the earth wire (grounding work).

•When the outdoor air temperature drops, power is supplied to the compressor with the purpose of preheating the compressor in order to protect it. Therefore, leave the main power switch at the “on” setting during the periods when the air conditioner is being used.

Digital Inverter

How to wire

1.	Connect the connecting wire to the terminal as identified
	with their respective numbers on the terminal block of the
	indoor and outdoor units.
	H07 RN-F or 60245 IEC 66 (1.5 mm2 or more)
2.	When connecting the connecting wire to the outdoor unit
	terminal, prevent water from coming into the outdoor unit.
3.	Secure the power supply wire and indoor/outdoor
	connecting wires using the cord clamp of the outdoor
	unit.
4.	For interconnecting wires, do not use a wire joined to
	another on the way.

Wiring diagram

*For details on the remote controller wiring/installation, refer to the Installation Manual enclosed with the remote controller.

Simultaneous twin system

Remote controller	Remote controller
	inter-unit wiring

Remote controller wiring

– 105

Incomplete grounding may lead to electric shock.

Do not connect ground wires to gas pipes, water pipes,

lightning rods or ground wires for telephone wires.

3. The appliance shall be installed in accordance with

national wiring regulations.

Capacity shortages of the power circuit or an incomplete

installation may cause an electric shock or fire.

CAUTION

• Wrong wiring may cause a burn-out of some electrical

parts.

• Be sure to use the cord clamps attached to the product.

• Do not damage or scratch the conductive core or inner

insulator of the power and inter-connecting wires when

peeling them.

• Use the power and Inter-connecting wires with specified

thicknesses, specified types and protective devices

„ Wiring between Indoor Unit and

Outdoor Unit

1.Figure below shows the wiring connections between the standard 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 installation place.

2.Refer to the wiring diagrams of the models concerned for the internal wiring connections of the outdoor unit and indoor units.

3.There is no need to perform the P.C. board settings for the indoor units.

Input power

380-415 V 3N~, 50Hz

380 V 3N~, 60Hz

L1
L2		Outdoor unit
L3
Ν
1	2	3

Use wires long enough to cover the entire length.

5. Wiring connections differ in conformance to EMC

standards, depending whether the system is twin,

triple or double twin. Connect wires according to

respective instructions.

CAUTION

•An installation fuse must be used for the power supply line of this air conditioner.

•Incorrect/incomplete wiring may lead to an electrical fire or smoke.

•Prepare an exclusive power supply for the air conditioner.

•This product can be connected to the mains power. Fixed wire connections:

A switch that disconnects all poles and has a contact separation of at least 3 mm must be incorporated in the fixed wiring.

Indoor side

Indoor/Outdoor connecting wires

Outdoor side

A	B		A	B
			Indoor
1	2	3	side	2	3
			1
1	2	3	Indoor power
			inter-unit wiring
L1	L2	L3	N
380-415 V 3N~, 50Hz
380 V 3N~, 60Hz

–

required.

• Remove the panel, and you can see electric parts on the

Leakage breaker

1 2 3

1 2 3

1 2 3

Simultaneous triple and double twin system

front side.

• A metal pipe can be installed through the hole for wiring.

If the hole size does not fit the wiring pipe to be used, drill

the hole again to an appropriate size.

Indoor unit

(main)

A B

Indoor unit (secondary)

A B

Indoor unit

(secondary)

A B

Remote controller	Remote controller
	inter-unit wiring

Remote controller wiring

Remote controller	Remote controller
inter-unit wiring	inter-unit wiring

Furthermore, be sure to secure these wires with the pipe valve fixing plate and cord clamps stored in the electric parts box.

Side D (Space: 8.5 mm)

Remote controller

Indoor side

Indoor/Outdoor connecting wires

A	B		A	B
			Indoor side
1	2	3	1	2	3
			Indoor power

A B

Indoor side

1 2 3

Indoor power

A B

Indoor side

1 2 3

Indoor power

Side C (Space: 4 mm)

• Secure the indoor/outdoor connecting wires at side C.

Electric parts box

„Power and Wiring Specifications

Model	224AT8	280AT8	224AT7	280AT7
(RAV-SM Type)
Power supply	380-415 V 3N~		380 V 3N~
	50 Hz		60 Hz
Maximum	18.0 A	22.0 A	18.0 A	22.0 A
running current
Installation

Outdoor side

1	2	3	inter-unit wiring
L1	L2	L3	N
380-415 V 3N~, 50Hz
380 V 3N~, 60Hz
			Triple

inter-unit wiring

Double twin

inter-unit wiring

Cord clamp

Pipe hole

Pipe valve fixing plate Panel

fuse rating	25 A	25 A	25 A	25 A
Power wire*		5 υ 2.5 mm2 or more
	(H07 RN-F or 60245 IEC 66)
Indoor/outdoor		4 υ 1.5 mm2 or more
connecting	(H07 RN-F or 60245 IEC 66)
wires*

*Number of wire υ wire size

*Use 2-core shield wire (MVVS 0.5 to 2.0 mm2 or more) for the remote controller wiring in the simultaneous twin, simultaneous triple and simultaneous double twin systems 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, simultaneous triple and simultaneous double twin systems.

EN 17 18 EN