Using installer settings
   
 
 
 
Carrier Connect™ Wi-Fi Thermostat 33CONNECTSTAT43FX    CARRIER CORPORATION ©2021  
Installation Guide    All rights reserved 
  37 
 
AIR FILTER REMINDER—Sets a value that specifies the number of equipment run hours 
before a FILTER REMINDER message is displayed on the home and dormant screen 
banners to remind the user to change the indoor air filter.  
No message is displayed to the user if the setting is OFF. Decrements to the timer occur 
each hour total equipment runtime is accumulated. Minute counts within each hour are 
not stored in non-volatile memory, so a power reset clears out the minutes within each 
hour of run time. The filter reset reminder hour timer value is stored in non-volatile 
memory. 
The top line in this screen scrolls to display AIR FILTER REMINDER HRS x 100 
NOTE If the REMOTE SENSOR is set to FLTR to detect a dirty filter, this setting is 
disabled and not available to the installer. 
3000 hours 
OFF 
500 to 15,000 hours 
(100 hour increments) 
OCCUPANCY OUTPUT—Select which output relay to use for the Occupancy Output. The 
choices only include outputs that are not already assigned to another function. 
The output that you select (Y3, O/B, or W2) is energized when in the occupied state and 
de-energized when in the unoccupied state.  
NOTE The occupancy output option is not available if the Y3, O/B, and W2 relays are 
already being used for other functions. The Y3 output is used for 3 stages of cooling, the 
humidifier, and the dehumidifier setting of HumidiMiZer™.  The O/B output is used for 
heat pump equipment, the humidifier, and the dehumidifier setting of HumidiMiZer™.  
The W2 output is used for 2 stages of heating, the humidifier, and the dehumidifier 
setting of HumidiMiZer™.   
Any output that is already being used is not shown in the OCCUPANCY OUTPUT 
selections. 
OCCUPANCY INPUT—Select what to do when a short on the remote temperature sensor is 
detected. 
The OCC (occupied) setting changes the current heat and cool setpoints to the occupied 
setpoints for the current time range for the maximum hold time when a short is detected 
on the remote temperature sensor for the duration of 2 to 5 seconds.  
The UNOCC (unoccupied) setting changes the current heat and cool setpoints to the 
unoccupied setpoints for the current time range for the maximum hold time when a short 
is detected on the remote temperature sensor for the duration of 2 to 5 seconds.  
HUMIDITY SOURCE—Select the source for the humidity value. 
STAT – use the temperature/humidity chip on the thermostat 
RMT – use the remote humidity sensor connected to the H and C terminals of the 
thermostat.     
REMOTE HUM SCALING—Specify the type of electrical signal that is output by the remote 
duct humidity sensor. If the humidity source is set to STAT (thermostat) then this setting 
is not available. 
The top line in this screen displays REMOTE HUM SCALING. 
Range  
•  0 to 10 - When using a 0-10 V signal from sensor 
•  2 to 10 - When using a 4-20ma signal with 500 ohm resistor 
HUIDITY OFFSET—Set an offset to the displayed humidity. This functionality offers the 
end user the convenience of matching the actual sensed humidity to a different 
perceived humidity or a different humidity measuring device.