78
Equipment Control Module
Furnace
Air Conditioner
Heat Stage 2
O/B W2
W2
Heat Stage 1
W/W1
W/W1
Cool Stage 1
Y1 / W2
Y1
Cool Stage 2
Y/Y2
Y/Y2
Y/Y2
Fan
G
G
24VAC Hot Heating
Rh
R
R
24VAC Hot Cooling
Rc
Dry Contact 1
D1
Dry Contact 2
D2
DHUM
24VAC Common
C
COM
C
Humidify
HUM
Outdoor Air Temp
OAT
Remote Room Sensor
RRS
OAT/RRS Com
SRTN
Outdoor Sensor *
Humidifier Solenoid
Valve *
Remote Room
Sensor *
Y1
* Indicates connection may not be required/available.
A09123
Fig. 32
−
Variable Speed, Step Modulating, Multi
−
Stage and Single
−
Stage
Furnace with Two
−
Stage Air Conditioner