Connecting Diagram - Toshiba MMU-AP0072H2UL Engineering Data Book

5
Outdoor unit

5-7. Connecting diagram

5-7-1. Heat recovery
Central control
power supply
1 60 Hz 120 V
(Note)
1. When using a central control, plug in the connector between [U1,U2] and [U3,U4] terminal of the header
unit.
2. Connect the shield of all control wiring to the control ground screw on every unit. (Indoor & Outdoor)
3. Group control.
4. Power supply wiring to be per NEC and local codes.
5. For the control wires connecting indoor units, outdoor units, and between indoor and outdoor units, use 2-
core shielded wires.
6. For additional details, see the individual unit wiring diagrams. (Indoor & Outdoor)
5-7-2. Heat pump
Outdoor unit
power supply
3 60 Hz 208/230 V
3 60 Hz 460 V
W1
Open
Indoor unit
power supply
1 60 Hz 208/230 V
Outdoor unit
power supply
3 60 Hz 208/230 V
3 60 Hz 460 V
W3
W2
7. Control wire and power line wire between FS unit and indoor unit are the accessory parts of FS unit.
(Wire length: 20 ft (6 m)
If the length between indoor and FS unit exceeds 16 ft (5 m), connect by using the connection cable kit sold
separately (RBC-CBK15FUL)
Connect the connector of control wiring on the indoor P.C. board, and so as the power supply wire to L and
N terminals.
8. When connecting the multiple indoor units to a single FS unit, only group control is available.
For the indoor unit, a remote control cannot be individually connected.
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Outdoor unit (Header unit)
Outdoor unit (Follower unit)
Indoor unit
Flow selector unit (FS unit)
Remote control
Central remote control (option)
Disconnect switch per NEC
Circuit breaker
W1 : Shielded control wiring between indoor and outdoor units
W2 : Shielded control wiring between indoor units
W3 : Shielded control wiring between outdoor units
W4 : Shielded central control wiring