3. Electrical work
3.1. Interface unit (Photo. 3-1)
1. Remove the cover.
2. Wire the power cable and control cable separately through the respective wiring
inlets given in the photo.
• Do not allow slackening of the terminal screws
.
A
Inlet for control cable
B
Inlet for power
C
Clamp
D
Interface / Outdoor unit connecting terminals
E
Earth terminal
3.1.1. Interface unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1 System
S1
S2
L
N
S1
S2
S3
S3
A
B
C
D
E
F
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Interface unit/outdoor unit connecting cables
F Interface unit
*1. Max. 80 m
*2. The
fi
gures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2.
Power supply cables and interface unit/outdoor unit connecting cables shall not be lighter than polychloroprene sheathed
fl
exible cable.
(Design 60245 IEC 57)
3. Install an earth longer than other cables.
Photo.3-2
Photo.3-1
A
B
C
E
C
D
Interface unit model
PAC-IF011/012B-E
Interface unit-Outdoor unit *1
3 × 1.5 (polar)
Interface unit-Outdoor unit earth *1
1 × Min. 1.5
Interface unit-Outdoor unit S1-S2 *2
AC 230 V
Interface unit-Outdoor unit S2-S3 *2
DC24 V
Wiring
Wire No. × size
(mm²)
Circuit
rating
4
GB