Service Manual

20
OCH636B
8
WIRING SPECIFICATIONS
S1
S2
S3
S1
S2
S3
208/230V
Warning:
In the 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.
24A63A03A42A81A21Aledom tinu roodtuO
Outdoor unit power supply
~/N (single), 60Hz,
208/230 V
~/N (single), 60Hz,
208/230 V
~/N (single), 60Hz,
208/230 V
~/N (single), 60Hz,
208/230 V
~/N (single), 60Hz,
208/230 V
~/N (single), 60Hz,
208/230 V
Outdoor unit input capacity Main switch (Breaker) *1 15 A 15 A 25 A 25 A 30 A 30 A
Wiring Wire
No. x
size (mm
2
)
Outdoor unit power supply 2 x Min AWG 14 2 × Min AWG 14 2 × Min AWG 12 2 × Min AWG 12 2 × Min AWG 10 2 × Min AWG 10
Indoor unit-Outdoor unit *2 3 x AWG 14 (polar) 3 x AWG 14 (polar) 3 x AWG 14 (polar) 3 x AWG 14 (polar) 3 x AWG 14 (polar) 3 x AWG 14 (polar)
Indoor unit-Outdoor unit earth *2
1 x Min AWG 14 (polar) 1 x Min AWG 14 (polar) 1 x Min AWG 14 (polar) 1 x Min AWG 14 (polar) 1 x Min AWG 14 (polar) 1 x Min AWG 14 (polar)
Remote controller-Indoor unit *3 2 × AWG 22 (Non-polar) 2 x AWG 22 (Non-polar) 2 x AWG 22 (Non-polar) 2 x AWG 22 (Non-polar) 2 x AWG 22 (Non-polar) 2 x AWG 22 (Non-polar)
Circuit
rating
Outdoor unit L1-L2 (single) *4 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC
Indoor unit-Outdoor unit S1-S2 (single) *4 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC 208/230 V AC
Indoor unit-Outdoor unit S2-S3 (single) *4 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC
Remote controller-Indoor unit *4 12 V DC 12 V DC 12 V DC 12 V DC 12 V DC 12 V DC
*1.
*2. Max. 50 m, 164 ft
S3 separated, Max. 262 ft [80 m]
*3. The 30 ft [10 m] wire is attached in the remote controller accessory.
*4. 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 insulated by the
transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2.
Power supply cords, the Indoor-Outdoor connecting cable and the water heater-Outdoor connecting cable shall not be lighter than polychloroprene
sheathed
flexible cord. (Design 60245 IEC 57
)
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire, or communication failure.
Single phase
A-Control
Outdoor Unit
A-Control
Indoor Unit
Isolator
3 poles isolator
8-1. INDOOR UNIT POWER SUPPLIED FROM OUTDOOR UNIT (A-control application)
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 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
Note: Affix a label A that is included with the manuals near each wiring diagram for the indoor and outdoor units..
S1
S2
L1
L2
GR
1
2
S1
S2
S3
S3
A
C
B
D
E
F
G
Be sure to earth ground construction work. As required to the leakage prevention measures.