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INSTALLING THE THERMOSTAT
TERMINAL DESIGNATIONS
Based on the 44-800 slide switch and installer option configurations, some terminals have
multiple output functions.
TERMINAL
Outside
Sensor Common
Inside
A
W
Y
R
C
10
DESIGNATION
Outdoor Sensor
Sensor Common
Indoor Sensor
W2, Y2, Compressor 2, Aux, EH
W1, Y3, Reversing Valve
Y1, Compressor 1
24 Volt (Hot)
24 Volt (Common)
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