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Electrical Wiring
Recommended wire lengths and diameters
AHU Kit
Control wiring
(C) Inter-unit (between Integrated
control system and indoor units)
1 Maximum applicable wire for terminal board of indoor unit: 4 mm
2 This maximum length shows a 2 % voltage drop.
3 With ring-type wire terminal
5
Notes on wiring system diagrams – All systems
NX
70
Type
PAW-280PAH3M-1
control wiring
Min. 0.75 mm²
Use shielded wiring (3)
Max. 1,000 m
1. Refer to the "Recommended wire lengths and diameters" tables for the explanation of
"A", "B", "C", "D", "E", "F" and "G" in the above diagrams.
2. The connection diagram below shows the power supply connector of the AHU Kit's
terminal board (actual appearance may differ slightly).
MAH3 generation
Terminal block section X1
X1
L
l
l
N
PE
l
X1.1
L
Power supply
X1.2
N
Neutral conductor
X1.4
PE
Protective earthing
3. Refrigerant Circuit (R.C.) address should be set on the outdoor unit as follows:
– for ECOi and PACi systems before turning the power on
– for ECO G and PACi NX systems after turning the power on.
4. Regarding R.C. address setting, refer to the installation instructions supplied with the
remote controller unit. Auto address setting can be executed by remote controller
automatically. Refer to the installation instructions supplied with the remote controller
unit.
(F / G) Connection cable between outdoor and AHU Kit
(F) Outdoor units:
(G) Outdoor units:
U-36/50PZ3E5,
U-100/125/140PZ3E5,
U-60/71PZ3E5A,
U-100/125/140PZ3E8
U-36/50/60PZH3E5
Min. 1.5 mm² (1)
Max. 40 m (2)
(D) Remote control wiring
Min. 0.75 mm²
(D) + (E): Max. 500 m; (E): Max. 200 m
The above descriptions can be used for the model CZ-RTC4, CZ-RTC5B and
CZ-RTC6 Series. For other remote controllers, refer to the manual of each
Terminal No.
X1.1
X1.2
X1.4
X1.1
X1.2
X1.3
X1.4
(G) Outdoor units:
U-71/100/125/140PZH4E5,
U-71/100/125/140PZH4E8
Min. 2.5 mm² (1)
Max. 50 m (2)
(E) Remote control wiring for group
control
Min. 0.75 mm²
unit.
PAH3 generation
Terminal block section X1
X1
Terminal No.
L
l
l
N
3
l
PE
l
L
Power supply
N
Neutral conductor
3
Communication terminal
PE
Protective earthing
AHU Kit – Installation Instructions – 07/2023
Min. 2.5 mm²
Max. 85 m
X1.1
X1.2
X1.3
X1.4
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