Toshiba MMW-AP0271LQ-TR Installation Manual page 23

 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 U5 U6
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
43-EN
Outdoor Power supply
380 V - 415 V ~, 50 Hz
Circuit breaker
Follower outdoor
unit
Earth
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 Earth
L N U1 U2 A B L N U1 U2 A B L N
A B A B
Remote controller Remote controller
Pull box Pull box
Group control
 Wire connection
REQUIREMENT
• Connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Pass the wires through the bushing of wire connection holes of the hot water module.
• Keep a margin (Approx. 100 mm) on a wire to hang down the electrical control box at servicing or other purpose.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
• Remove the front panel of the hot water module by taking off the mounting screws (2 positions).
• Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
• Mount the front panel of the hot water module without pinching wires.
Front
panel
U1 U2 A B
COM S1 S2 S3 S4 S5
– 22 –
Power supply wiring port
Control wiring port
External signal wiring port
Side D (Space: 8.5 mm)
Earth Screw
R S Cord clamp
(L) (N)
U1 U2 A B (For power supply
wire)
* Cable clamp can be attached on left side.
Wire
type
Cabtyre
Power supply wire
cable
Cabtyre
Remote controller wire
cable
Control wire
Output signal function wire
(Unit: mm)
R S
(L) (N)
Earth wire
Power supply wire
Side C (Space: 4 mm)
Cable clamping
Specification
position
3-core stranded
Side D
wire 2.5 mm²
4-core stranded
Side C
wire 1.5 mm²
EN
44-EN