Wiring Specifications - Mitsubishi Electric PUHZ-SW160YKA-BS Service Manual

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WIRING SPECIFICATIONS

8-1. FIELD ELECTRICAL WIRING (power wiring specifications)

Outdoor unit model

Outdoor unit power supply

Outdoor unit input capacity main switch (Breaker) *1

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 pole 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. Maximum 80 m. Total maximum including all indoor/indoor connection is 80 m.

• Use one cable for S1 and S2, and another for S3 as shown in the picture.

*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 V DC 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. Wiring size must comply with the applicable local and national codes.

2. Power supply cables and the cables between indoor and outdoor unit shall not be lighter than polychloroprene sheathed flexible cables. (Design

60245 IEC 57)

3. Be sure to connect the cables between indoor and outdoor unit directly to the units (no intermediate connections are allowed).

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 .

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

(If an intermediate connection is necessary, be sure to take measures to prevent water from entering the cables.)

2. Power supply cables and Indoor/Outdoor unit connecting cables shall not be lighter than polychloroprene sheathed flexible cable.

4. Install an earth longer than other cables.

(Design 60245 IEC 57)

5. Do not construct a system with a power supply that is turned ON and OFF frequently.

3. Install an earth longer than other cables.

Power supply

A-Control

Outdoor Unit

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.

OCH583A

3N~ (3 ph 4-wires), 50 Hz, 400 V

Cable length 50m: 3×4 (Polar)/

Cable length 80m: 3×6 (Polar)

Isolator

SW160/200

32 A

5 × Min. 4

1 × Min. 2.5

2 × 0.3 (Non-polar)