Carrier 40VMH024 Installation And Maintenance Instructions Manual page 18

outdoor unit
L1
Main MDC unit
L2
MDC unit
Maximum wiring length
Fig. 30 —Typical Heat Recovery System Communication Wiring
Centralized controller
L5
L3
L3
L3
L3
L4
L4
18
wired controller
Indoor unit 1#
Indoor unit 2#
Indoor unit 3#
Indoor unit 4#
wired controller
Indoor unit 5#
Indoor unit 6#
L6
L7
L8
L9
L10
L11