9. Group connection
NOTE: When different type of indoor units (such as wall mounted type and cassette type, cassette
type and duct type, or other combinations) are connected using group control system, some
functions may no longer be available.
1. Connect up to 16 indoor units in a system.
A
B C D E
I.U. I.U. I.U. I.U.
Remote controller
A, B, C, D, E: Remote controller cable
Wiring length limitation A + B + C + D + E ≤ 500 m
Example of wiring method:
Remote controller cable
Remote controller
Non-polar 2-wire type:
Indoor unit 1
Y1 Y2
Y1 Y2
Y1 Y2 Y1 Y2 Y1 Y2
Indoor unit 2 Indoor unit 3 Indoor unit 4
Polar 3-wire type:
Y1 Y2 Y3 Y1 Y2 Y3Y1 Y2 Y3Y1 Y2 Y3
1 2
R W
Remote
controller cable
Bus wire
Remote controller
Indoor unit 1 Indoor unit 2 Indoor unit 3 Indoor unit 4
- 39 -
9. Group connection
DUCT TYPE
ARTH30-54KMTAP
DUCT TYPE
ARTH30-54KMTAP
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