Toshiba MMW-AP0481CHQ-E Installation Manual page 24

 Wiring between indoor (including hot water module) and outdoor units
NOTE
• An outdoor unit connected with control wiring between indoor (including hot water module) and outdoor units wire becomes automatically the header unit.
• Do not turn off the circuit breaker of the hot water module when the circuit breaker of the system (outdoor unit) is set to the ON position.
• It becomes a cause of a trouble.
▼ Wiring example
: In case of connecting Flow selector unit for SHRM-e
(Single port long piping model or Multi port type)
Hot water module
power supply
220-240 V ~, 50 Hz
Circuit breaker
(Earth leakage breaker)
power switch
Hot water module
power supply
220-240 V ~, 50 Hz
Circuit breaker
(Earth leakage breaker)
power switch
Indoor unit / Flow selector unit
power supply
220-240 V ~, 50 Hz
Circuit breaker
(Earth leakage breaker)
power switch
45-EN
Outdoor unit
Header outdoor
U1 U2 S U3 U4 U5 U6 S
Control wiring between indoor and outdoor units
Indoor unit
Earth
L N
U1 U2 A B
A B
Remote controller
Pull box
Communication
wire
Flow selector unit Flow selector unit
A B
L N L N
Earth
Pull box Pull box Pull box
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Outdoor unit
Follower outdoor
U1 U2 S U3U4 U5 U6 S
Control wiring between outdoor units
Control wiring between indoor units
Indoor unit Hot water module Hot water module
Earth Earth Earth
L N L N
U1 U2 A B U1 U2 A B
A B A B
Remote controller Remote controller
Pull box
Communication
Communication
wire
wire
Flow selector unit
A B A B
L N
Earth Earth
Pull box
L N
U1 U2 A B
Flow selector unit
A B
L N
Earth
Pull box
46-EN