Toshiba Super MMU-AP0092H Service Manual page 41

7
ELECTRICAL WORK
u 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
The remote controller wire (Communication line) and AC220–240V 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, etc.
Indoor unit Indoor unit
Remote controller
wiring
L1
Remote
Remote controller inter-unit wiring
controller
(Up to 1000m) 1.25 mm²
Wire size
(Up to 2000m) 2.0 mm²
(Up to 1000m) 1.25 mm²
Wire size
(Up to 2000m) 2.0 mm²
Wire size: 0.5mm² to 2.0mm²
In case of wired type only Up to 500m
In case of wireless type included Up to 400m
Up to 200m
CAUTION
Indoor unit Indoor unit
L2 Ln
(Max. 8 units)
n Wire connection
REQUIREMENT
• Be sure to connect the wires matching the terminal numbers. Incorrect connection causes a trouble.
• Be sure to pass the wires through the bushing of wiring connection port of the indoor unit.
• Keep a margin (Approx. 100mm) on a wire to hang down the electric parts box at servicing, etc.
• The low-voltage circuit is provided for the remote controller. (Do not connect the high-voltage circuit)
• Make a loop on the wire for margin of the length so that the electric parts box can be taken out during servicing.
1. Remove the cover of the electric parts box by taking off the mounting screws (2 positions) and pushing the
hooking section. (The cover of the electric parts box remains hanged to the hinge.)
2. Connect the power supply wire and remote controller wire to the terminal block of the electric parts box.
3. Tighten the screws of the terminal block, and fix the wires with cord clamp attached to the electric parts box.
(Do not apply tension to the connecting section of the terminal block.)
4. Using the attached thermal insulation material, seal the pipe connecting port.
Otherwise, dewing may be caused.
5. Mount the cover of the electric parts box without pinching wires.
(Mount the cover after wiring on the ceiling panel.)
Side D (Space: 8.5mm) Side C (Space: 4mm)
* Cable clamp can be attached on left side.
Cable clamping
Specification
Wire type
position
3-core
Cabtyre cable
Side D
stranded wire 2.5mm²
4-core
Cabtyre cable
Side C
stranded wire 1.5mm²
Power supply terminal block
R S
Cord clamp
Screws in 2 positions
Hinge
Louver connector
(CN510:White)
u Thermal insulation to wiring connecting port
Adhered surface
Notched section
Remote controller
terminal block
R S
(L) (N)
Earth line
Connecting cord