Mitsubishi Electric PUHZ-SW100HA, Installation Manual

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S1
S2
S3
S1
S2
S3
10
7.2. Field electrical wiring
Outdoor unit model SW40, 50V SW75V SW100V
SW120V SW100, 120Y
Outdoor unit power supply
~/N (single),
50 Hz, 230 V
~/N (single),
50 Hz, 230 V
~/N (single),
50 Hz, 230 V
~/N (single),
50 Hz, 230 V
3N~ (3 ph 4-wires),
50 Hz, 400 V
Outdoor unit input capacity Main switch (Breaker) *1 16 A 25 A 32 A 40 A 16 A
Wiring
Wire No. × size (mm
2
)
Outdoor unit power supply 3 × Min. 1.5 3 × Min. 2.5 3 × Min. 4 3 × Min. 6 5 × Min. 1.5
Indoor unit-Outdoor unit *2 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar) 3 × 1.5 (Polar)
Indoor unit-Outdoor unit earth *2 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5 1 × Min. 1.5
Remote controller-Indoor unit *3 2 × 0.3 (Non-polar) 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 (3 phase)
*4 AC 230 V AC 230 V AC 230 V AC 230 V AC 230 V
Indoor unit-Outdoor unit S1-S2 *4 AC 230 V AC 230 V AC 230 V AC 230 V AC 230 V
Indoor unit-Outdoor unit S2-S3 *4 DC 24 V DC 24 V DC 24 V DC 24 V DC 24 V
Remote controller-Indoor unit *4 DC 12 V DC 12 V DC 12 V DC 12 V DC 12 V
*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
*2. Max. 45 m
If 2.5 mm 2 used, Max. 50 m
If 2.5 mm 2 used and S3 separated, Max. 80 m
*3. The 10 m wire is attached in the remote controller accessory.
*4. The
fi gures are NOT always against the ground.
S3 terminal has DC 24 V against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated by the transformer or other device.
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.
7. Electrical work
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
fl exible 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 insuf
fi cient insula-
tion 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.
Outdoor Unit
3 poles isolator
Power
supply
Isolator
Indoor unit
(Interface unit /
Flow temp.
controller)
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fi re or communication failure.