Carrier 40VMU Series - Page 12

12
Fig. 23 — Typical Communication Wiring of Heat Pump System
NOTE: Network resistor is shipped with the outdoor unit for field installation on heat pump systems.
P Q
X Y
X Y
outdoor unit Centralized controller
HA HB
P Q
P Q
P Q
P Q
P Q
wired controller
HA HB
L1
L3
L5
L6
L7
L8
L9
L10
L11
L3
L3
L3
L3
Indoor unit 1#
Indoor unit 2#
Indoor unit 4#
Indoor unit 5#
Indoor unit 6#
Indoor unit 3#
P Q
HA HB
HA HB
HA HB
HA HB
HA HB
HA HB
P
Q
Network Resistor
wired controller
Touch screen
HA HB
HA HB
HA HB
HA HB
HA HB
HA HB
NOTE: Power from IDU
NOTE: 24 v. DC Power
(Field Supplied)
Maximum wiring length
//IW$:*&RUH6WUDQGHG6KLHOG
/IW$:*&RUH6WUDQGHG6KLHOG
////IW$:*&RUH6WUDQGHG6KLHOG
//IW$:*&RUH6WUDQGHG6KLHOG
LEGEND
AWG — American Wire Gage
IDU — Indoor Unit