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SMMS 1-Way Cassette SH Type
Installation Manual
EN
SMMS 1-Way Cassette SH Type
Installation Manual
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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.
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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 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.
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
accumulated total current values of the indoor units.
Power supply wiring
Below 50 m
2.5 mm
2
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
L1
L
L2
Ln
Indoor unit
Remote controller inter-unit wiring
Indoor unit
Indoor unit
Indoor unit
Remote
controller
(Max. 8 units)
Remote
controller
wiring
Wiring between indoor and outdoor units
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes automatically the
header unit.
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Wiring example
U1 U2
U1 U2 U3 U4
L1 L2 L3 N
U5 U6
L N
A B
A B
U1 U2 U3 U4
L1 L2 L3 N
U5 U6
U1 U2
L N
A B
A B
U1 U2
L N
A B
A B
U1 U2
L N
A B
Outdoor Power supply
380 V - 415 V ~, 50 Hz
380 V ~, 60 Hz
Circuit breaker,
Power switch
Remote controller
Indoor unit
Outdoor Power supply
380 V - 415 V ~, 50 Hz
380 V ~, 60 Hz
Remote controller
Remote controller
Indoor unit
Indoor unit
Indoor unit
Circuit breaker
Circuit breaker
Header outdoor
unit
Follower outdoor
unit
Control wiring between outdoor units
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor power supply
220 V - 240 V ~, 50 Hz
220 V ~, 60 Hz
Earth
Earth
Earth
Earth
Group control
Pull box
Pull box
Pull box
Earth
terminal
Earth
terminal
23-EN
24-EN
+00EH99880399_01EN.book Page 12 Monday, April 4, 2011 11:24 AM
