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SMMS 2-way Air Discharge Cassette Type
Power supply
Power supply
Power supply switch/circuit breaker or power supply wiring/fuse rating for indoor units should be selected by the
accummulated 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.
EN-37
220 V – 240 V ~, 50 Hz
220 V ~, 60 Hz
Below 50 m
2.5 mm²
19
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 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
Remote
controller
L
1
wiring
Remote
controller
(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
In case of wireless type
included
Indoor unit
Indoor unit
L
2
Remote controller inter-unit wiring
(Max. 8 units)
Installation Manual
Up to 500 m
Up to 400 m
Up to 200 m
Indoor unit
L
n
EN-38
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