8
WIRING SPECIFICATIONS
8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT
The following illustrations show available connection patterns.
The outdoor unit power supply patterns vary on each model.
1:1 System
Simultaneous twin system
A
Outdoor unit power supply
B
Wiring circuit breaker or isolating switch
C
Outdoor unit
D
Indoor unit/outdoor unit connecting cords
E
Remote controller
F
Indoor unit
G
Indoor unit earth
S1
S2
L1
L2
GR
1
2
S1
S2
S3
S3
S1
S2
L1
L2
GR
1
2
S1
S2
S3
1
2
S1
S2
S3
S3
Warning:
In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between power line
and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when the power is
energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units.
Indoor unit model
PLA-A42
PCA-A42
PEAD-A42
2A
15A
–
A
C
B
D
E
A
C
B
D
E
F
F
F
G
G
G
Indoor unit power supply
Minimum circuit ampacity
Maximum rating of overcurrent protective device
*1. Maximum 147 ft [45 m].
If AWG13 used, maximum 164 ft [50 m].
If AWG13 used and S3 separated, maximum 262 ft [80 m].
*2. The 30 ft [10 m] wire is attached in the remote controller accessory. Maximum 1500 ft [500 m].
*3. The figures are NOT always against the ground.
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulataed by the transformer or other device.
*4. Use earth leakage breaker (NV)
1.Wiring size must comply with the applicable local and national code.
2.Use copper supply wires.
3.Use wires rated 600V or more for the power supply cables and the indoor/outdoor unit connecting cables.
4.Install an earth longer than other cables.
Notes:
Outdoor unit model
Outdoor unit power supply
Breaker size
Minimum circuit ampacity
Maximum rating of overcurrent protective device
Outdoor unit power supply
Outdoor unit power supply earth
Indoor unit-Outdoor unit
*1
Indoor unit earth
Remote controller-Indoor unit
*2
Outdoor unit L1-L2
*3
Indoor unit-Outdoor unit S1-S2
*3
Indoor unit-Outdoor unit S2-S3
*3
Remote controller-Indoor unit
*3
HA42
Single, 208/230 V, 60 Hz
40 A
37 A
44 A
2
o
Min. AWG 8
1
o
Min. AWG 8
3
o
AWG 16 (polar)
1
o
Min. AWG 16
2
o
AWG 22 (Non-polar)
208/230 V AC
208/230
24 V DC
12
Wir
ing
Wire No
.
o
siz
e
Circuit
ra
ting
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
208/230V
Single phase
Isolator
A-Control
Indoor Unit
*4
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4°F [
í
20°C] or higher.
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4°F [
í
20°C] condition, it needs at least 4 hr standby to operate in order to warm the electrical parts.
V AC
V DC
OCH567
