Panasonic PAW-160MAH3M Installation Instructions Manual page 71

5. Use shielded wires for inter-unit control wiring (C) to ECOi, ECO G and PACi PZ2/
PZH2 systems and also to centralised controllers in case of PACi NX systems, with
shielded woven mesh grounded on both sides, otherwise misoperation from noise
may occur.
For instructions on how to connect the wiring see →
p. 65.
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 set to "SHORT". 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.
AHU Kit – Installation Instructions – 07/2023
Shielded wire
Ground Ground
● In case that the inter-unit control wiring in the link has only of 3-line connections:
> Set the terminating resistance on the indoor unit control PCB.
Upon shipment, 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"
Indoor unit control PCB
> Note that setting 3 or more terminating resistances to "SHORT" (operative) is
prohibited.
Central controller
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
5.5 Wiring system diagrams,
Indoor unit Indoor unit
Indoor unit Indoor unit
Electrical Wiring
5
(operative).
71