Wiring Specifications - Mitsubishi Electric PUZ-HWM140VHA Service Manual

7

WIRING SPECIFICATIONS

FIELD ELECTRICAL WIRING (power wiring specifications)
Outdoor model name
Outdoor unit power supply
Outdoor unit input capacity Main switch (Breaker)
Outdoor unit power supply
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Remote controller-Indoor unit
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase)
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*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.
Caution: Be sure to install N-line. Without N-line, it could cause damage to the unit.
Notes: 1. In multi-phase appliances, the colour of the neutral conductor of the supply cord, if any, shall be blue.
2. Wiring size must comply with the applicable local and national codes.
3. Power supply cables and the cables between Controller and Outdoor unit shall not be lighter than polychloroprene sheathed
flexible cables. (Design 60245 IEC 57)
4. Be sure to connect the cables between 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.)
5. Install an earth line longer than power cables.
6. Do not construct a system with a power supply that is turned ON and OFF frequently.
7. Use self-extinguishing distribution cables for power supply wiring.
8. Properly route wiring so as not to contact the sheet metal edge or a screw tip.
Power supply
Outdoor Unit
Warning:
In the 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.
OCH748
Isolator
S1
S2
S3
HWM140V
~/N (single), 50 Hz, 230 V
*1 40 A
3 × Min. 6
*2
3 × 1.5 (Polar)
*2
1 × Min. 1.5
*3 2 × 0.3 (Non-polar)
*4 230 VAC
*4 230 VAC
*4 24 VDC
*4 12 VDC
3 poles isolator
S1
Indoor unit/
(Interface unit/
S2
Flow temp.
controller)
S3
17
HWM140Y
3N~ (3 ph 4-wires), 50 Hz, 400 V
16 A
5 × Min. 1.5
3 × 1.5 (Polar)
1 × Min. 1.5
2 × 0.3 (Non-polar)
230 VAC
230 VAC
24 VDC
12 VDC