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What is the Carrier Connect™ 33CONNECTSTAT43FX Thermostat?
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Heating
W1 - first stage heat
○
W2 - second stage heat
○
W1 + W2 - third stage heat
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HP with electric heat (up to 2 stages of cooling and 5 stages of heating with 3 stages auxiliary)
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Cooling
Y1 + O/B - first stage cooling
○
Y1 + Y2 + O/B - second stage cooling
○
•
Heating
Y1 - first stage HP heating
○
Y1 + Y2 - second stage HP heating
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Y1 + Y2 + W1 - HP heating + first stage aux heat
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Y1 + Y2 + W2 - HP heating + second stage aux heat
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Y1 + Y2 + W1 + W2 - HP heating + third stage aux heat
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HP with gas heat (up to 2 stages of cooling and 4 stages of heating with 2 stages auxiliary)
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This system is known as a dual fuel system.
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When gas heat turns on, the HP heat turns off unless defrost is active.
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Once the gas is turned on, the heating demand is satisfied with gas heat. The thermostat does not stage
down from gas to heat pump heat.
•
Cooling
Y1 + O/B - first stage cooling
○
Y1 + Y2 + O/B - second stage cooling
○
•
Heating
Y1 - first stage HP heating
○
Y1 + Y2 - second stage HP heating
○
W1 - first stage aux heat
○
W1 + W2 - second stage aux heat
○
Definitions
Heat demand
Cool demand
Heat demand satisfied
Cool demand satisfied
Carrier Connect™ Wi-Fi Thermostat 33CONNECTSTAT43FX
Installation Guide
The space temperature is less than the heat setpoint (HEAT TO setting).
The space temperature is greater than the cool setpoint (COOL TO setting).
The space temperature is greater than the heat setpoint (HEAT TO setting).
The space temperature is less than the cool setpoint (COOL TO setting).
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