Carrier 40VMZ Installation And Maintenance Instructions Manual page 14

outdoor unit
L1
Main MDC unit
L2
MDC unit
MAXIMUM WIRING LENGTH
L1+L2 < 3937 ft 18 AWG, 2-Core Stranded Shield
L3 < 3937 ft 18 AWG, 2-Core Stranded Shield
L4 < 3937 ft 18 AWG, 2-Core Stranded Shield
L5 < 3937 ft 18 AWG, 2-Core Stranded Shield
L6+L7+L8+L9 < 820 ft 18 AWG, 2-Core Stranded Shield
L10+L11 < 820 ft 18 AWG, 2-Core Stranded Shield
Fig. 25 —Typical Heat Recovery System Communication Wiring
Centralized controller
L5
L3
L3
L3
L3
L4
L4
14
wired controller
Indoor unit 1#
L6
Outside Air Unit
wired controller
CN50
CN51
FAN CTON HTON AUXH
ACB interface
L11
CN54
OFF GND
L6
wired controller
Indoor unit 2#
Reheat unit
L6
wired controller
Indoor unit 3#
L6
Indoor unit 4#
wired controller
L10
wired controller
Indoor unit 5#
L10
Indoor unit 6#