Humidity Sensor Fault - Lennox ComfortSense 7500 Installation And Setup Manual

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NOTE - Humiditrol
of an outdoor sensor. If sensor is not connected
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and Humiditrol EDA is enabled, "OUTDOOR
SENSOR REQUIRED" is displayed in the
information display.
Cooling only—Dehumidification will only occur if:
1. Dehumidification demand is present.
2. Cooling demand is not present.
3. Outdoor temperature is less than 95ºF,
4. Indoor temperature is not cooler than 65ºF or
cooler than the heating set point + 2ºF (IF the
difference between cooling and heating set
points is greater than the deadband).
In this case, 24VAC is removed from the D
terminal and Y1 and Y2 terminal (if available)
becomes activated with 24VAC. This cycles the
indoor variable
dehumidification speed and cycle Y2 ON to the
outdoor unit. Cooling has priority over Humiditrol
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calls. Humiditrol mode is allowed to over cool up
to 2ºF above the heating set point.
EDA operation requires use
speed motor to
Heat only—Thermostat will cycle heating ON and
OFF to maintain
Dehumidification functions are disabled.
Heat/Cool—Dehumidification will only occur if a
dehumidification demand is present, a cooling
demand is not present, outdoor temperature is
less than 95ºF, indoor temperature is above 65ºF
and the indoor temperature is not cooler than 2ºF
above heating set point.
Note: If the last thermostat demand was a heating
demand, the thermostat does not require a cooling
demand before Humiditrol

Humidity Sensor Fault

If the humidification sensor fault occurs, then the H
terminal becomes inactive, and the D terminal
goes to 24VAC.
Dew point adjust is only available when an outdoor
sensor is attached.
the
Other Humiditrol
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If the outdoor sensor is disconnected while
HUMIDITROL is enabled, the thermostat will not
allow operation in dehumidification mode.
40
heating set point.
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operation.
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EDA Notes