Basic A/C With Optional Electric Heat No Economizer Or Ventilation Packages - Bard W12AAA Installation Instructions Manual

Low Voltage Connection
These units use a 24-volt AC low voltage circuit. The "R" terminal is the hot terminal and the "C" terminal is grounded.
"G" terminal is the fan input.
"Y" terminal is the compressor input for cooling 1-Stage units only or 2-Stage units with ECONWM*
"Pink Wire" is 2nd Stage cooling 2-Stage units only with ECONWM*
"Y1" terminal is the 1st Stage compressor input for cooling 2-Stage units only — No ECONWM*
"Y2" terminal is the 2nd Stage compressor input for cooling 2-Stage units only — No ECONWM*
"W1" terminal is the 1st stage electric heat.
"W2" terminal is the 2nd stage heat (if equipped).
"A", "E", "F" terminals are the ventilation inputs. See Figures 8-10 for detailed diagrams.
NOTE: On models with "J" Control Module, Terminals 1, 2 and 3 are used for the alarm relay.
FIGURE 7
LOW VOLTAGE WIRING
BASIC A/C WITH OPTIONAL ELECTRIC HEAT
NO ECONOMIZER OR VENTILATION PACKAGES
Manual 2100-618
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