19
SMMS 2-way Air Discharge Cassette Type
Installation Manual
EN-37
EN-38
Power supply
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.
Power supply
220 V – 240 V ~, 50 Hz
220 V ~, 60 Hz
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
Below 50 m
2.5 mm²
Communication line
Remote controller wiring
• 2-core with non-polarity wire is used for wiring of the remote controller wiring and group remote controllers wiring.
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.
Control wiring between indoor units,
and outdoor unit (2-core shield wire)
Wire size
(Up to 1000 m) 1.25 mm²
(Up to 2000 m) 2.0 mm²
Central control line wiring (2-core
shield wire)
Wire size
(Up to 1000 m) 1.25 mm²
(Up to 2000 m) 2.0 mm²
Remote controller wiring, remote controller inter-unit wiring
Wire size: 0.5 mm² to 2.0 mm²
Total wire length of remote controller wiring and remote
controller inter-unit wiring = L + L1 + L2 + … Ln
In case of wired type only
Up to 500 m
In case of wireless type
included
Up to 400 m
Total wire length of remote controller inter-unit wiring = L1 + L2 + … Ln
Up to 200 m
n
L
2
L
1
L
Remote
controller
wiring
Indoor unit
(Max. 8 units)
Remote controller inter-unit wiring
Remote
controller
Indoor unit
Indoor unit
Indoor unit
Summary of Contents for MMU-AP0072WH
Page 36: ...DH91303401 ...
