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Equipment Control Module
Furnace
Heat Pump
O
RVS Cooling
O/B W2
W2
Heat Stage 3
(furnace)
W/W1
W/W1
W2**
Heat/Cool Stage 1
Y1 / W2
Y1
Heat/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.
** Some heat pumps may designate W1.
***Option 19 set to 2.
A09121
Fig. 30
−
Variable Speed, Multi
−
Stage, Stage Modulating and Single
−
Stage
Furnace with 2
−
Stage Heat Pump