Panasonic U-8MF1E8 Mode D'emploi page 17

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CAUTION
(1) When linking outdoor units in a network, disconnect the terminal extended from the short plug (CN003, 2P Black, location:
right bottom on the outdoor main control PCB) from all outdoor units except any one of the outdoor units.
(When shipping: In shorted condition)
For a system without link (no connection wiring between outdoor units), do not remove the short plug.
(2) Do not install the inter-unit control wiring in a way that forms a loop. (Fig. 4-1)
Outdoor unit Outdoor unit
Indoor unit Indoor unit
(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address setting.
Outdoor unit Indoor unit
NO
Indoor unit
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
(Branches less than 1 m are not included in the total branch number.) (Fig. 4-3)
Outdoor unit
Indoor unit
more than 1 m
Branch
Point
Indoor unit
16 or fewer
more than 1 m
Indoor unit
less than 1 m
Indoor unit
(5) Use shielded wires for inter-unit control wiring (c)
and ground the shield on both sides, otherwise
misoperation from noise may occur. (Fig. 4-4)
Connect wiring as shown in Section "4-3. Wiring System
Diagram".
Shielded wire
Ground Ground
(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)
Outdoor unit
Prohibited
Prohibited
Indoor unit Indoor unit Indoor unit
Indoor unit
Indoor unit
Branch point
Outdoor unit Outdoor unit
Indoor unit Indoor unit Indoor unit
Indoor unit Indoor unit Indoor unit
WARNING
Loose wiring may cause the terminal to overheat or result
in unit malfunction. A fire hazard may also occur. Therefore,
ensure that all wiring is tightly connected.
When connecting each power wire to the terminal, follow the
instructions on "How to connect wiring to the terminal" and
fasten the wire securely with the fixing screw of the terminal
plate.
Fig. 4-4
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SUPPLEMENT
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4-4. Connecting multiple indoor units to a single solenoid valve kit
● It is possible to connect plural number of indoor units to one solenoid valve kit. The indoor units can be controlled individually or be
operated as a group.
● It is possible to adopt plural number of units with a common use of the solenoid valve kit per piece of refrigerant.
● Categories of connected indoor unit capacities are determined by the solenoid valve kit.
Type of solenoid valve kit
CZ-P160HR2
CZ-P56HR2
* If the capacity range is exceeded, use two solenoid valves connected in parallel.
Fig. 4-1
Fig. 4-2
Fig. 4-3
Total capacity of indoor units (kW)
5.6 < Total capacity 16.0
2.2 Total capacity 5.6
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