Toshiba MMW-AP0271LQ-E Installation Manual page 22

Indoor unit Indoor unit
L
Remote
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
Indoor unit Indoor unit
L
Remote
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
HWM HWM
Remote L
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
NOTE
It is not possible to connect any Hot Water Modules and any indoor units together for group control.
41-EN
HWM : Hot Water Module
Indoor unit Indoor unit
Correct
L2 Ln
(Max. 8 units)
Indoor unit HWM
Incorrect
L2 Ln
(Max. 8 units)
HWM HWM
Correct
( * )
L2 Ln
(Max. 8 units)
(*) : In the case of multiple refrigerant systems
– 21 –
 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
Outdoor Power supply
380 V - 415 V ~, 50 Hz
Circuit breaker
Header outdoor
unit
Earth
L1 L2 L3 N U1 U2 U3 U4
terminal
Control wiring between indoor and outdoor units
Indoor unit
Earth
L N U1 U2 A B
Indoor power supply
A B
220 V - 240 V ~, 50 Hz
Remote controller
Circuit breaker,
Pull box
Power switch
Outdoor Power supply
380 V - 415 V ~, 50 Hz
Circuit breaker
Follower outdoor
unit
Earth
U5 U6 L1 L2 L3 N U1 U2 U3 U4 U5 U6
terminal
Control wiring between outdoor units
Control wiring between indoor units
In the case of connecting
two hot water modules.
Indoor unit Hot water module Hot water module
Earth Earth
L N U1 U2 A B L N U1 U2 A B
A B A B
Remote controller Remote controller
Pull box Pull box
Group control
Earth
L N U1 U2 A B
42-EN