Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1062

FDC-HKXR
Outdoor/Indoor units connection procedures
Power source (indoor unit side)
Power source wire
[Individual flow divide controller accessory wire (2m)
Individual flow divide controller accessory wire (2m)
Relay kit
(Individual flow divide controller acessory)
Signal wire [Relay kit accessory (2m)]
Signal wire
Do not connect high voltage wire 380/415V to signal wires, as these wires are DC 5V. Signal wires should be connected so that
the terminal Nos. conform with each other for between outdoor and between indoor units. However, they will work properly if
different polarities are connected. (Connect (A) and (A), (B) and (B).)
(4) Indoor and outdoor signal wiring
(a) If only one Outdoor unit is used
Outdoor signal teminal block
Indoor signal terminal block
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.
1060
Outdoor unit
A B
Individual flow
divide controllor
L
A B
•
N
C
N
X Y Z
U
Cn Cn
Cn
B T4 T
1
X Y Z
Remote
controller
Outdoor control box
Signal wire (Between outdoor and indoor units)
Be sure to let the signal wire get in through the signal wire inlet.
A B
Double cores 0.75 ~ 2 mm
Total length of signal wires: 1000 m or less
A B
B B
A A
7 mm or less
L
A B
•
N
C
N
X Y Z
U
Cn
Cn Cn
B T4
T
2
Remote controller wire
X Y Z
Sensor inlet
Signal wire inlet
2
A B A B
B B
Either of the above wiring is correct.
A A
To next units by turn
Signal wire (between indoor unit)
Indoor unit