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S1
S2
S3
S1
S2
S3
5. Electrical work
5.2. Field electrical wiring
Outdoor unit model
HWM140V
HWM140Y
Outdoor unit power supply
~/N (single), 50 Hz, 230 V
3N~ (3 ph 4-wires), 50 Hz, 400 V
Outdoor unit input capacity Main switch (Breaker)
*1
40 A
16 A
Wiring Wire
No. × size
(mm²)
Outdoor unit power supply
3 × Min. 6
5 × Min. 1.5
Indoor unit-Outdoor unit
*2
3 × 1.5 (Polar)
3 × 1.5 (Polar)
Indoor unit-Outdoor unit earth
*2
1 × Min. 1.5
1 × Min. 1.5
Remote controller-Indoor unit
*3
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 (3 phase)
*4
230 VAC
230 VAC
Indoor unit-Outdoor unit S1-S2
*4
230 VAC
230 VAC
Indoor unit-Outdoor unit S2-S3
*4
24 VDC
24 VDC
Remote controller-Indoor unit
*4
12 VDC
12 VDC
*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
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.
*2. Max. 45 m
If 2.5 mm² used, Max. 50 m
If 2.5 mm² used and S3 separated, Max. 80 m
*3. The 10 m wire is attached in the remote controller accessory.
*4. The figures are NOT always against the ground.
S3 terminal has 24 VDC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
*5. In multi-phase appliances, the colour of the neutral conductor of the supply cord, if any, shall be blue.
Outdoor Unit
3 poles isolator
Isolator
Indoor Unit
(Flow temp.
controller)
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.
Notes: 1. Wiring size must comply with the applicable local and national codes.
2. Power supply cables and the cables between Interface unit/Flow temp. 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 Interface unit/Flow temp. 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 longer than other cables.
5. Do not construct a system with a power supply that is turned ON and OFF frequently.
6. Use self-extinguishing distribution cables for power supply wiring.
7. Properly route wiring so as not to contact the sheet metal edge or a screw tip.
Power supply
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
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