User Manual

9
Terminal Assignments
For reference, standard wiring assignments for
typical HVAC systems are provided below.
Terminal
(HP)
Terminal
(Non-HP)
Heat Pump
System
(HP)
Conventional
System
(Non-HP)
C C 24VAC common for control
circuit and thermostat power
input
L L System
monitor
Not used
G G Fan
Y1 Y1 1st stage
compressor
1st stage
cooling
Y2 Y2 2nd stage
compressor
2nd stage
cooling
RC RC 24VAC power supply for cooling
side
RH RH 24VAC power supply for heating
side
O/B W1 Changeover
valve
1st stage
heating
E W2 AUX/
Emergency
heat
2nd stage
heating