Toshiba Carrier MMD-AP0246HPUL Manuel D'installation page 20

Wiring between indoor unit and outdoor units
■
NOTE
• A wiring diagram below is an example for connection to SMMS-u series. For connecting to other outdoor unit
series, refer to the Installation Manual attached to the outdoor unit to be connected.
Wiring example
▼
Outdoor Power supply
Circuit breaker
Outdoor unit
Header outdoor
Earth
terminal
S: The ground of a
shielded wire
Control wiring between outdoor units (Shield wire)
Control wiring between indoor and outdoor units (Shield wire)
Control wiring between indoor units (Shield wire)
Indoor unit Indoor unit
Earth Earth
Indoor power supply
Remote controller
208/230-1-60 Hz
Circuit breaker, Pull box Pull box
Power switch
37-EN
1116950171_EN-FR-ES.indb 19 1116950171_EN-FR-ES.indb 19
Outdoor Power supply
Circuit breaker
Outdoor unit
Follower outdoor
Earth
terminal
S: The ground of a shielded wire
Indoor unit Indoor unit
Earth Earth
Remote controller Remote controller
Pull box
Group control
– 19 –
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 indoor unit.
• Keep a margin (Approx. 3.9" (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)
• Before performing wiring work in the electrical control box, remove the
cover of the box (fixed with 2 screws).
• Remove screw A, and loosen screw B.
• Pull up the electrical control box cover and then open it forward.
• Tighten the screws of the terminal block firmly, and fix the wires with
the cord clamps attached to the electrical control box.
(Do not apply tension to the connecting section of the terminal block.)
• Slide the electrical control box cover to install it. Do not pinch the wire
too strong, and reduce the load on the wire. Make the gap as small as
possible when installing the cover.
A B
Cord clamp
Remote controller
L N
wiring
Earth screw
System interconnection
wire
R S
(L) (N)
Earth wire
System interconnection wire
Remote controller wiring
Strip off approx. 0.4" (9 mm) the wire to be connected.
Wiring diagram
Terminal block for remote
Terminal block
controller wiring of indoor unit
A
A
B B
Remote controller wire
(Locally procured)
Electrical control
box cover Loosen screw B.
1
2
Remove screw A.
Side D (Space: 0.3" (8.5 mm)) Side C (Space: 0.2" (4 mm))
Select side C or D for the power cable clamping position referring to
the following table according to the cable type and diameter.
* Cable clamp can be attached on either right or left side.
When twin system are connected, clamp two cables with one cable
clamp.
Wire type Specification Cable clamping position
Cabtyre cable 3-core stranded wire AWG14
Cabtyre cable 4-core stranded wire AWG16
See the figure on the left for
system interconnection wires to
the terminal block.
System interconnection wire
Remote
controller
unit
Side D
Side C
38-EN
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