49
OCH439M
WIRING SPECIFICATIONS
7
FIELD ELECTRICAL WIRING (power wiring specifications)
Caution: Be sure to install N-line. Without N-line, it could cause damage to the unit.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2.
Power supply cables and the cables between Controller and Outdoor unit shall not be lighter than polychloroprene sheathed
flexible cables. (Design 60245 IEC 57)
3. Be sure to connect the cables between Controller and Outdoor unit directly to the units (no intermediate connections are al-
lowed).
Intermediate connections may result in communication errors. If water enters at the intermediate connection point, it may
cause insufficient
insulation to ground or a poor electrical contact .
(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)
4. Install an earth line longer than power cables.
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 Interface unit/
Flow temp. controller and outdoor unit, please use 3-pole type.
S1
S2
S3
S1
S2
S3
A-Control
Outdoor Unit
3 poles isolator
Power supply
Isolator
Interface unit/
Flow temp. controller
0
5
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V
Outdoor unit power supply
~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V ~/N (single), 50 Hz, 230 V 3N~ (3phase), 50 Hz, 400 V
A
6
1
A
0
4
A
5
2
A
6
1
1
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Wiring
Wire No. × size (mm²)
5
.
1
n
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×
5
6
n
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×
3
4
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M
×
3
5
.
1
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×
3
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3 × 1.5 (polar)
3 × 1.5 (polar)
3 × 1.5 (polar)
3 × 1.5 (polar)
Interface unit/Flow temp. controller-Outdoor unit earth
Interface unit/Flow temp. controller-Outdoor unit
Remote controller-Interface unit/Flow temp. controller
2 × 0.3 (Non-polar)
2 × 0.3 (Non-polar)
2 × 0.3 (Non-polar)
2 × 0.3 (Non-polar)
Circuit rating
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3phase)
230 V AC 230 V AC
230 V AC
Interface unit/Flow temp. controller-Outdoor unit S1-S2
Interface unit/Flow temp. controller-Outdoor unit S2-S3
Remote controller-Interface unit/Flow temp. controller
*1
A breaker with at least 3.0 mm contact separation in each pole shall be provided. Use earth leakage breaker (NV).
*2
Maximum 80 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 insulated by the transformer or other device.
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
230 V AC
230 V AC
230 V AC
230 V AC
230 V AC
24 V DC
24 V DC
24 V DC
24 V DC
12 V DC
12 V DC
12 V DC
12 V DC
85V
140V
112Y, 140Y
*2
*2
*3
*3
*3
*3
1 × Min 1.5
1 × Min 1.5
1 × Min 1.5
1 × Min 1.5
Never splice the power cable or the Interface unit/Flow temp. controller - outdoor connection cable, otherwise it
may result in smoke emission, a fire or communication failure.
