S1
S2
L
N
S1
S2
S3
S3
A
B
C
D
E
F
TB6
4. Electrical work
4.1. Electrical connection
All electrical work should be carried out by a suitably qualified technician. Failure to
comply with this could lead to electrocution, fire, and death. All wiring should be ac
-
cording to national wiring regulations.
Connections should be made to the terminals indicated in the following figures.
Use ring terminals and insulate the wires.
Tighten the screw from the bottom terminals first.
Notes:
1. Do not run the low voltage cables through a slot that the high voltage cables
go through.
2. Do not bundle power cables together with other cables.
3. Bundle cables as Fig. 4.1.1 by using clamps.
4.1.1. Interface unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
A Outdoor unit power supply
B Earth leakage breaker *1, *2
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Interface unit/outdoor unit connecting cables
F Interface unit
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Interface unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
Interface unit power supply cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60227 IEC 53)
3. Install an earth longer than other cables.
<Fig. 4.1.1>
Wiring Wire No. × size (mm²)
Interface unit - Outdoor unit *3
3 × 1.5 (polar)
Interface unit - Outdoor unit earth *3
1 × Min. 1.5
Circuit rating
Interface unit - Outdoor unit S1-S2 *4
230 V AC
Interface unit - Outdoor unit S2-S3 *4
24 V DC
Note:
In accordance with IEE regulations the circuit breaker/isolating switch located on the outdoor unit should be installed with lockable devices (health and safety).
*3. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*4.The values given in the left table are not always measured against the ground value.
INPUT
Remote controller
thermistor
OUTPUT
Power cables
4.1.2. Separate interface unit/outdoor unit power supplies
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
S1
S2
L
N
L
N
S1
S2
S3
S3
A
C
B
D
G
E
B
C
F
TB6
A Outdoor unit power supply
B Earth leakage breaker *1, *2
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Interface unit/outdoor unit connecting cables
F Interface unit
G Interface unit power supply
If the interface and outdoor units have separate power supplies, refer to the table
below.
<Photo 4.1.2>
CNS2
Note:
In accordance with IEE regulations the circuit breaker/isolating switch located on the outdoor unit should be installed with lockable devices (health and safety).
Separate power supply specifications
Interface unit controller connector
(CNS2) connection change
Disconnected
Outdoor unit DIP switch settings (when
using separate interface unit/outdoor
unit power supplies only)
ON
3
OFF
1
2
Set the SW8-3 to ON.
(SW8)
*1 If the installed earth leakage circuit breaker does not have a function to protect over-current
,
install a breaker with that function along the same power line.
*2. A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth
leakage breaker (NV).
The breaker shall be provided to ensure disconnection of all active phase conductors of the
supply.
*1 If the installed earth leakage circuit breaker does not have a function to protect over-current,
install a breaker with that function along the same power line.
7
EN
