Lennox ComfortSense 7500 Installation And Setup Manual page 30

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HUMIDITROL
This setting is for commercial split systems only. If
Humiditrol is enabled in the installer settings, then
this adjustment affects overcooling operation.
Overcooling ranges from 2ºF below the cooling
setpoint (MIN setting) down to 2ºF above the
heating setpoint (MAX setting). Halfway between
the two settings is the MID setting.
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If a Humiditrol EDA is installed and enabled, then
the thermostat must be configured to properly
operate the Humiditrol
Figure 15 for the Humiditrol
flowchart):
Check the HUMIDITY SETTINGS in user settings
to confirm that the user has turned ON
dehumidification setting.
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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,
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EDA as follows (see
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EDA operation
EDA operation requires use
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.
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.
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speed motor to
heating set
the
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point.