Carrier Infinity SYSTXCCITC01-C Installation Instructions Manual page 15

Each communicating device in the Infinity Zone System has a four-pin
connector labeled ABCD. It is recommended that the following color
code be used when wiring each device:
A — Green = Data A+
B — Yellow = Data B-
C — White = 24VAC (Com)
D — Red = 24VAC (Hot)
It is not mandatory that the above color code be used, but each ABCD
connector in the system MUST be wired consistently.
NOTE: Some outdoor units, typically those with multiple compressor
stages, provide their own low-voltage power source and do not require
the "C" (24VAC common) and "D" (24VAC power) connections. See the
outdoor unit installation instructions for more information.
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying, or servicing system, the main electrical
disconnect switch must be in the OFF position. There may be more than
one disconnect switch. Lock out and tag switch with a suitable warning
label.
WARNING
!
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A B C D
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