2-4
Design of VRF SYSTEMS
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9
1. Electrical Wiring
2-4
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(1)
(2)
When linking the outdoor units in a network, disconnect the terminal extended from the short plug from
all outdoor units except any one of the outdoor units.
(When shipping: In shorted condition.)
For a system without link (no wiring connection between outdoor units), do not remove the short plug.
Do not install the inter-unit control wiring in a way that forms a loop.
Outdoor unit
NO
Branch point
Outdoor unit
Outdoor unit
Outdoor unit
Prohibited
Prohibited
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
CAUTION
(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address
setting.
(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.
Fig. 2-2
Fig. 2-3
Fig. 2-4
Central Controller
Outdoor unit
Outdoor unit
Outdoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
Indoor unit
: Branch point
More than 2m require
d
Design of VRF SYSTEMS
1. Electrical Wiring
TD831172-03 VRF SYS INDOOR.indb 4
2015/05/25 17:58:00