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.

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.

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.

Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.

HWM140V

~/N (single), 50 Hz, 230 V

40 A

3 × Min. 6

3 × 1.5 (Polar)

1 × Min. 1.5

2 × 0.3 (Non-polar)

230 VAC

24 VDC

12 VDC