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Electrical Wiring
Recommended wire lengths and diameters
AHU Kit
Control wiring
1 The circuit breaker must be incorporated in the fixed wiring in accordance with the wiring regulations.
2 Use a shielded cable for the control wiring.
Wiring system diagram – PACi NX systems and PAH3 generation AHU Kit
NX
For single-phase outdoor units – Single-system connection
5
WHT
For single-phase outdoor units – Multi-system connection
WHT
90
Type
PAW-280PAH3M
(C) Inter-unit control wiring
(between outdoor unit and AHU Kit)
Min. 0.75 mm
2
Max. 1,000 m
Remote
controller
D
1
1
BLK
2
2
Remote
controller
D
1
1
BLK
2
2
E
(B) Power supply
Min. 0.75 mm
2
Max. 25.0 m
(D) Remote control wiring
2
0.75 mm2
(AWG# 18)
Use shielded wiring
Max. 500 m
AHU Kit
G/F
X1
L
N
3
PE
X5
U1
C
U2
R1
R2
AHU Kit
G/F
X1
L
N
3
PE
X5
U1
C
U2
R1
R2
AHU Kit
C
G/F
X1
L
N
3
PE
X5
U1
U2
R1
R2
Circuit breaker
(E) Control wiring for group
(AWG# 18)
Use shielded wiring
Max. 200 m (total)
Outdoor unit
A
L
1
L
N
2
N
3
Central control system
(optional)
Outdoor unit
A
L
1
L
N
2
N
3
Central control system
(optional)
Outdoor unit
A
L
1
L
N
2
N
3
AHU Kit – Installation Instructions – 11/2021
1
6 A
control
1
0.75 mm2
Power supply
220 – 240V ~50/60Hz
Ground
Power supply
220 – 240V ~50/60Hz
Ground
Power supply
220 – 240V ~50/60Hz
Ground
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