Specifications

867
FDC-HKX
(4) Indoor and outdoor signal wiring
(a) If only one Outdoor unit is used
(b) If plural outdoor units are used
1) A maximum of 48 indoor units can be connected by using the crossover wiring method, with 2 wires for
each side of the outdoor and indoor units.
2) Indoor/outdoor wiring method for multiple floors.
3) Loop wiring is prohibited
Notes (1) The indoor and outdoor signal wiring are without polarity
(2) For connection to the terminal block, use as M3.5 (5/32) round eye-let terminal is shown below.
Either of the above wiring is correct.
AB
AB AB
A
B
A
B
A
B
A
B
AB
Outdoor signal teminal block
Indoor signal terminal block
Double cores 0.75 ~ 2 mm
2
Total length of signal wires: 1000 m or less
Double cores 0.75 ~ 2 mm
2
Total length of signal wires: 1000 m or less
Double cores 0.75 ~ 2 mm
2
Total length of signal wires: 1000 m or less
7 mm or less
AB
Outdoor unit
AB
Indoor unit
AB
Outdoor unit
AB
Indoor unit
AB
Outdoor unit
AB
Indoor unit
AB
Outdoor unit
AB
Indoor unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Outdoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Indoor
unit
Outdoor
unit
Indoor
unit
Outdoor
unit
Indoor
unit
Outdoor
unit
Indoor
unit
Outdoor
unit
Indoor
unit
(No)
Loop wiring of signal wires is prohibited
Wiring at the Portion indicated by a
dotted line is prohibited.