26
Electric wiring and the application
Communication wiring figure
Outdoor units are in parallel through 3 polar wires. The outdoor and all VP (cooling and heating
switching device) and all indoor units are in parallel through 2 non-polar wires.
Each VP can be connected to 1~8 indoor units. For the wiring, please refer to the above picture:
VP1 is connected to Indoor 1~3, and the capacity of all the indoor units can not be more than
the VP’s. Indoor units which are not connected to VP just have cooling operation, and the wiring
can be referred to Indoor 16~20 on the above picture.
Three wiring methods between wired controller and indoor unit:
A. 1 to multi (group control): one wired controller controls 2~16 indoors, as shown in above
figure, indoor 1~indoor 5: indoor 5 is wired control master unit, the others are wired control
slave units. Wired controller and the master indoor (directly connected to wired controller) are
connected by 3 polar wires; the other indoors and the master indoors are connected by 2 polar
wires.
B. 1 to 1 (one wired controller controls one indoor): as shown in above figure, indoor 6~ indoor
19, indoor and wired controller are connected by 3 polar wires.
Outdoor 1
Indoor 1
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
P Q B C
PQ B C
P Q B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
P Q A BC
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
PQ A B C
Indoor 6
Indoor 11
Indoor 16
VP 1
VP 4
VP 9
VP 5
VP 10
VP 6
VP 11
VP 7
VP 12
VP 8
VP 13
VP 2
VP 3
Indoor 2
Indoor 7
Indoor 12
Indoor 17
Indoor 3
Indoor 8
Indoor 13
Indoor 18
Indoor 4
Indoor 9
Indoor 14
Indoor 19
Indoor 5
Indoor 10
Indoor 15
Indoor 20
Outdoor 2
Communication wire with polarity
Control wire for wired controller with polarity
Outdoor 3
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller
wired
controller