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.

Notes: 1. Wiring size must comply with the applicable local and national code.

2. Power supply cords and Indoor/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)

3. Install an earth longer than other cables.

4. Use self-extinguishing distribution cables for power supply wiring.

5. Properly route wiring so as not to contact the sheet metal edge or a screw tip.

Warning:

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-poles type.

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

Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).

Intermediate connections can lead to communication error if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the inter-

mediate connection point.

230 V

Single phase

Isolator

Outdoor Unit

SWM40/SWM60/SWM80

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

16 A

2 × Min. 2.5

1 × Min. 2.5

3 × 1.5 (Polar)

1 × Min. 1.5