Standard AC Wiring Diagrams update

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Standard AC with Two Stage Furnace Control Wiring
Two Stage Furnace
Two Stage Thermostat
Standard A/C Condenser
24 Volt+
Fan Only Operation
Common
Air Conditioning
1st Stage Heat (White)
2nd Stage Heat (Brown)
2nd Stage AC
AC Contactor
Control Board
2
This diagram is to be used as reference for the low voltage control wiring of your heating and AC system. Always refer to your thermostat or equipment
installation guides to verify proper wiring.
NOTE
Y2
Some AC Systems will have a blue wire with a pink stripe in place of the yellow or Y wire.
**Refer to the blower chart for CFM requirements. Jump if needed to achieve correct CFM.
*Place a jumper connecting Y1 and O.
Y2
NOTE
(see below)
**