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S1
S2
S3
S1
S2
S3
208/230V
Single phase
Isolator
3 poles isolator
A-Control
Outdoor Unit
A-Control
Indoor Unit
9
6.2. Field electrical wiring
Outdoor unit model HA24 HA30 HA36 HA42
Outdoor unit power supply Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz Single, 208/230 V, 60 Hz
Breaker size *4 25 A 35 A 35 A 40 A
Minimum circuit ampacity 17 A 24 A 26 A 36 A
Maximum rating of overcurrent protective device 27 A 40 A 42 A 60 A
Wiring
Wire No. ×
size
Outdoor unit power supply 2 × Min. AWG 12 2 × Min. AWG 10 2 × Min. AWG 8
Outdoor unit power supply earth 1 × Min. AWG 12 1 × Min. AWG 10 1 × Min. AWG 8
Indoor unit-Outdoor unit *1 3 × AWG 14 (polar)
Indoor unit earth *1 1 × Min. AWG 14
Remote controller-Indoor unit *2 2 × AWG 22 (Non-polar)
Circuit
rating
Outdoor unit L1-L2 *3 208/230 VAC
Indoor unit-Outdoor unit S1-S2 *3 208/230 VAC
Indoor unit-Outdoor unit S2-S3 *3 24 VDC
Remote controller-Indoor unit *3 12 VDC
*1. Max. 45 m, 147 ft
If 2.5 mm
2
used, Max. 50 m, 164 ft
If 2.5 mm
2
used and S3 separated, Max. 80 m, 262ft
*2. The 10 m, 30 ft wire is attached in the remote controller accessory. Max 1500 ft
*3. The gures are NOT always against the ground.
S3 terminal has 24 VDC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulataed by the transformer or other device.
*4. Please follow applicable federal, state, or local codes to prevent potential leakage/electric shock. Or install a ground fault interrupt for the prevention of leakage and electric shock.
Notes: 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.
6. Electrical work
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.
Warning:
• Turn on the main power when the ambient temperature is -20°C, -4°F or higher.
• In below -20°C, -4°F condition, it needs at least 4hr standby to operate in order to warm the electrical parts.
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a re or communication failure.
en
010
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