Mitsubishi Electric PAC-IF012B-E Installation Manual page 4

3. Electrical work
C
Photo.3-1
A
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.
D
A B C
S1
S2
S3
Photo.3-2
Interface unit model
Interface unit-Outdoor unit
Interface unit-Outdoor unit earth
Interface unit-Outdoor unit S1-S2
Interface unit-Outdoor unit S2-S3
*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.
4
C
B
E
1 System
F
L
N
S1
S2
S3
E
PAC-IF011/012B-E
*1
*1
*2
*2
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.
Inlet for control cable
A
B Inlet for power
Clamp
C
Interface / Outdoor unit connecting terminals
D
Earth terminal
E
D
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
3 × 1.5 (polar)
1 × Min. 1.5
AC 230 V
DC24 V