Standard AC Wiring Diagrams update

24 Volt+
Fan Only Operation
Common
Air Conditioning
1st Stage Heat (White)
2nd Stage Heat (Brown)
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www.alpinehomeair.com
Standard AC with Standard Air Handler - No Heat
Wire Size: 18 Gauge
Standard Single Thermostat
Standard A/C Condenser
AC Contactor
Control Board
Standard Air Handler
3
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
Some AC Systems will have a blue wire with a pink stripe in place of the yellow or Y wire.