93
AHU Kit – Installation Instructions –
11/2021
Electrical Wiring
5
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.
5. Use shielded wires for inter-unit control wiring (C) to ECOi, ECO G and PACi PZ2/
PZH2 systems and also to centralized controllers in case of PACi NX systems, with
shielded woven mesh grounded on both sides, otherwise misoperation from noise
may occur.
Shielded wire
Ground
Ground
Connect wiring as shown in the section “Wiring System Diagrams”.
6.
Use the standard power supply cables for Europe (such as H05RN-F or H07RN-F
which conform to CENELEC(HAR) rating specifications) or use the cables based on
IEC standard (245 IEC57, 245 IEC66).
7. When linking ECOi, ECO G and PACi outdoor units in a network, the following rules
for bus terminators must be observed.
Upon shipment the bus terminator is in shorted condition. When linking two outdoor
units, open the jumper from the bus terminator for only one of these outdoor units.
When linking more than two outdoor units, open the jumper from the bus terminator for
all but the first and the last one in the same link wiring network.
For a system without link (no wiring connection between outdoor units), do not remove
the bus terminator bridge.
When linking PACi NX outdoor units in a network, the installation method of the
terminating resistance (bus terminator) depends on the connecting procedure of the
inter-unit control wiring in the link as follows.
●
In case that the inter-unit control wiring in the link are all 3-line connection:
> Set the terminating resistance on the indoor unit control PCB.
Upon shipment, the the terminating resistance is set to “OPEN” (inoperative).
If the shorting socket is replaced as shown below, the terminating resistance is
set to “SHORT” (operative).
Change the setting of the terminating resistance at the nearest indoor unit and
farthest indoor unit from the integrated control system to “SHORT” (operative)
.
Indoor unit control PCB
Summary of Contents for PAW-280PAH3M-1
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