Toshiba MMC-AP0157HP-E Installation Manual page 14

▼Power supply
Power supply
Power supply switch / circuit breaker or power supply wiring / fuse rating for indoor units should be selected by
the accumulated total current values of the indoor units.
Power supply wiring
Control wiring, Central controller wiring
• 2-core with polarity wires are used for the Control wiring between indoor unit and outdoor unit and Central
controller wiring.
• To prevent noise trouble, use 2-core shield wire.
• The length of the communication line means the total length of the inter-unit wire length between indoor and
outdoor units added with the central control system wire length.
▼Communication line
Control wiring between indoor units, and
outdoor unit (2-core shield wire)
Central control line wiring (2-core shield
wire)
Remote controller wiring
• 2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.
Remote controller wiring, remote controller inter-unit
wiring
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + ... Ln
Total wire length of remote controller inter-unit wiring = L1 + L2 + ... Ln
CAUTION
The remote controller wire (Communication line) and AC 220-240 V wires cannot be parallel to contact
each other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control
system due to noise or other factor.
Indoor unit Indoor unit
Remote
L
controller
L1
wiring
Remote
Remote controller inter-unit wiring
controller
25-EN
220-240 V ~, 50 Hz
220 V ~, 60 Hz
Below 50 m 2.5 mm 2
(Up to 1000 m) 1.25 mm²
Wire size
(Up to 2000 m) 2.0 mm²
(Up to 1000 m) 1.25 mm²
Wire size
(Up to 2000 m) 2.0 mm²
Wire size: 0.5 mm² to 2.0 mm²
In case of wired type only Up to 500 m
In case of wireless type
Up to 400 m
included
Up to 200 m
Indoor unit Indoor unit
L2 Ln
(Max. 8 units)
– 13 –
◆ 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. 100 mm) on a wire to hang down the electrical control box at servicing.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
1
Loosen the cover mounting screws (2 positions) of the electrical control box, and then remove the
cover.
2
Connect the indoor power supply wire, system interconnection wires and the remote controller wire to
the terminal block of the electrical control box.
3
Tighten screws of the terminal block securely, and fi x the wires with code clamp attached to the
electrical control box. (Do not apply tension to the connecting section of the terminal block.)
4
Mount the cover of the electrical control box so that it does not pinch the wires.
Electrical control
Two screws
box cover
▼Connecting power supply wire and the system interconnection wire
Power supply Interconnection wire / Remote
terminal block controller terminal block
Power supply wire
R S
(L) (N)
10
10
50
30
Earth wire
Power supply wire
P.C. board
Terminal block
System interconnection
wires
Run the system
interconnection wire here
through the clamp base and
fi x it with a cord clamp.
Power supply wire
Run the power supply
wire here through the
clamp base and fi x it
with a cord clamp.
See the fi gure on the left
for connecting wires to the
terminal block.
Power supply wire
26-EN