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SMMS-i
Installation Manual
EN
SMMS-i
Installation Manual
Be sure to keep the rule of below tables about size and length of communication wiring.
(*1): Total length of Communication wiring length for all refrigerant circuits (L1 + L2 + L3 + L4)
Table-1 Communication wiring between indoor and outdoor units (L1, L2, L3), Central control wiring
(L4)
Wiring 2-core, non-polarity
Type Shield wire
Size/Length 1.25 mm
2
: Up to 1000 m/2.0 mm
2
: Up to 2000 m (*1)
Table-2 Communication wiring between outdoor units (L5)
Wiring 2-core, non-polarity
Type Shield wire
Size/Length 1.25 mm
2
to 2.0 mm
2
/Up to 100 m (L5)
Table-3 Remote controller wiring (L6, L7)
Wire 2-core, non-polarity
Size 0.5 mm
2
to 2.0 mm
2
Length
• Up to 500 m (L6 + L7)
• Up 400 m in case of wireless remote controller in group control.
• Up to 200 m total length of communication wiring between indoor units (L6)
U3U4
U1U2
U1
U3
U2
U4
U5U6
U1U2
A B
U3U4
U1U2
U5U6
U1U2
A B
U1U2
A B
U1U2
A B
U1U2
A B
U3U4
U1U2
U5U6
U3U4
U1U2
U5U6
U3U4
U1U2
U5U6
U3U4
U1U2
U5U6
U1U2
A B
U1U2
A B
U1U2
A B
U3U4
U1U2
U5U6
L1
L5
L6
L7
L4
L2 L3
Header
unit
Header
unit
Follower
unit
Follower
unit
Follower
unit
Header
unit
Follower
unit
Super modular multi system
Central
control
controller
Outdoor unit
Indoor unit
Table-1
Table-2
Table-1
Remote controller
Remote controller
Remote controller
Table-3
◆Group control through a Remote Controller
Group control of multiple indoor units (8 units) through a single remote controller switch
Connection of power wires and communication wires
Remove knockouts on the piping/wiring panel on the front of the unit and the panel on the bottom to get the power and
communication wires through the holes.
NOTE
Be sure to separate the power wire and communication wires.
AB AB AB AB AB AB
(A.B)
Remote controller
Indoor unit
No.1
No.2
No.3
No.4
No.7
No.8
Piping/wiring panel
Knockout for the power
supply wire
Knockout for the power
wire
Knockout for the
communication wire
39-EN 40-EN
+00EH99871699_01EN.book Page 20 Thursday, August 26, 2010 4:41 PM