Carrier Connect Installation Manual page 34

Using the Carrier® Connect™ Wi-Fi Thermostat's screens
If cooling equipment is not available, COOL TO DEHUMIDIFY is not adjustable on the thermostat and the blue
Dehum Setpoint wheel is not adjustable.
HUMIDIFY — not adjustable on the thermostat (the orange Hum Setpoint wheel is not adjustable) if any of the
following are true:
• the output is configured as an O/B output for a heat pump
•
if the output is configured as a Y3 output for 3-stage cooling
•
if the output is configured for DEHUM
DEHUMIDIFY — The
present.
COOL TO DEHUMIDIFY = YES — When humidity is above the dehumidify target, the cooling setpoint is adjusted
downward, increasing cooling demand, according to the equations in the following table, when you select YES for
DEHUMIDIFY (not true for OVERCOOL (2) or HUMIDIMIZER selections).
Cooling Setpoint
< = 70°F
70.1° - 74.9°F
> = 75°
When cooling to dehumidify, the minimum ON timer increases to 5 minutes and the second stage (or greater) is
not started unless there is also a cooling demand.
Humidi-MiZer™
When the output is configured as a DEHUM output, and the humidity level is above the dehumidify target, 24V
is output at the
terminal. There is a +1/-4% hysteresis around the dehumidify target to prevent rapid on/off cycling of the
output.
This output may be connected to compressor outputs on commercial equipment. If the
without any compressors being energized, the 5-minute time guard must be enforced.
Use the following table to determine the values for the terminal outputs to the equipment when specific demands
are present.
NOTES
•
When the
cooling.
•
The value of X denotes that the setting may be Off or On, depending on the state of the FAN ON WITH W set
on advanced SYSTEM SETTINGS screen.
Carrier Connect™
Wi-Fi Thermostat
Installation Guide
output energizes a 24 Vac signal to dehumidifier equipment if a dehumidify demand is
Algorithm
Use the cooling setpoint only
Cooling setpoint = Cooling Setpoint – (Cooling Setpoint - 70°F) x (Dehumidify
Error / 10) with maximum dehumidify Error of 6% (i.e. use 6% if >6%)
Cooling setpoint = Cooling Setpoint – (Dehumidify Error / 2) with maximum
dehumidify Error of 6%
terminal. When the humidity level is below the dehumidify target, 0 Vac is output on the
output is used for dehumidification, you cannot also use a heat pump, humidifier, or 3rd stage
Carrier Proprietary and Confidential
30
output is energized
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