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outdoor unit
P
Q
X
L1
Maximum wiring length
NOTE: Network resistor is shipped with the outdoor unit for field installation on heat pump systems.
Fig. 31 — Typical Heat Pump System Communication Wiring
Centralized controller
L5
Y
L3
L3
L3
L3
L3
P
Network Resistor
Q
X Y
Indoor unit 1#
P Q
Indoor unit 2#
P Q
Indoor unit 3#
P Q
Indoor unit 4#
P Q
Indoor unit 5#
P Q
Indoor unit 6#
P Q
20
Touch screen
wired controller
NOTE: 24 v. DC Power
(Field Supplied)
HA HB
L6
L7
L8
L9
wired controller
NOTE: Power from IDU
HA HB
L10
L11
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