Carrier Connect 33CONNECTSTAT43 - Heating and Dehumidification

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Operating your system using the Carrier® Connect™ Wi-Fi Thermostat

Heating

The thermostat's application and configuration determine the specific heating sequence. It can control up to 4

stages of heating when configured for non-Carrier heat pump applications, or up to 2 stages of heating for non-

heat pump applications. When applied to a Carrier commercial heat pump, HEAT TYPE must be set to GAS. HEAT

TYPE set to ELECTRIC supports the Carrier 3-stage heat operation using 2 outputs. See Outputs based on demand

and configuration (page 37).

NOTE The heating stages are controlled, based on a drift algorithm and the configurable DIFFERENTIAL value

(.5°F default).

The following conditions must true for heating to operate:

• The OAT must be below the HEAT LOCKOUT (55°F default), if enabled

• The heating stage 5-minute minimum off-timer has expired

• The space temperature has exceeded the heating setpoint by the DIFFERENTIAL value (.5°F default)

Additional stages are added and dropped, based on demand, using the DIFFERENTIAL value, STAGE DELAY timer,

and FORCED STAGE UP timer configuration values. If the LOW HEAT LOCKOUT is configured for ON, or between

20 and 5°F, and the OAT is equal to or less than that value, heat stages 1 and 2 are energized on a demand for

heating and remain on until the heating demand is satisfied.

NOTE Once a heating stage is energized, it will remain on for a minimum of 5 minutes, regardless of demand.

Dehumidification

There is occupied and unoccupied dehumidification on units that are equipped with the Carrier Humidi-MiZer™

from the factory, or by energizing the first stage of cooling and over-cooling by 2°F.

The following conditions must be true for dehumidification to operate:

• For the Humidi-MiZer™ option, DEHUMIDIFY must be set to HUMIDIMIZER

• For over-cooling, DEHUMIDIFY must be set to OVRCL 2°F

• For non-Humidi-MiZer™ units, DEHUMIDIFY must be set to YES and must not have an active call for heating

or cooling

• Setpoint range is 35 to 65%

• Humidity must be 2% greater than the dehumidify setpoint

Dehumidification ends when DEHUMIDIFY is set to:

• HUMIDIMIZER and humidity drops 3% below the dehumidify setpoint

• OVRCL2° and space temperature drops below the cooling setpoint by more than 2°F

• YES and space temperature drops below the calculated setpoint or there is a demand for heat or cool.

NOTE For details about this calculation, see HUMIDITY (page 29).

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