Lennox CS7500 User Manual

26
Normal
In this mode, dehumidication occurs if these con-
ditions are met and signals are present at specic
terminals:
1. Dehumidication has been enabled on
installer settings, and
2. Unit is in COOL mode
3. Dehumidication demand exists (RH above
set point)
4. Cooling demand exists (Y1 energized).
Max
In this mode, dehumidication occurs if all maximum
conditions are true, except cooling demand may or
may not be present. Maximum over cool from cool-
ing set point is 2ºF.
RTU/Aux Dehumidier
When dehumidify mode is in “RTU/AUX dehumidi-
er”, “D” terminal works in active logic.
The RTU/Aux dehumidier setting is used with RTU
with rooftop units only when a dehumidier is used
for dehumidication. This requires:
1. Dehumidier has been wired to thermostat per
dehumidier installation instructions.
2. Dehumidication has been enabled on installer
settings.
3. Unit is in COOL mode, (or if in AUTO, there has
been at least one thermostat cooling call made
prior to the dehumidication demand).
4. Dehumidication demand exists (RH above set
point).
Humiditrol®
This setting is for commercial split systems only. If
Humiditrol is enabled in the installer settings, then
this adjustment a󰀨ects over-cooling operation.
Over-cooling 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.
If a Humiditrol® EDA is installed and enabled,
then the thermostat must be congured to properly
operate the Humiditrol® EDA as follows (see Figure
15 for the Humiditrol® EDA operation owchart):
Check the HUMIDITY SETTINGS in user
settings to conrm that the user has turned ON
dehumidication setting.
NOTE: Humiditrol
®
EDA operation requires use
of an outdoor sensor. If sensor is not
connected and Humiditrol
®
EDA is enabled,
“OUTDOOR SENSOR REQUIRED” is
displayed in the information display.
Cooling only - Dehumidication will only occur if:
1. Dehumidication 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
di󰀨erence between cooling and heating set
points is greater than the deadband).

Lennox CS7500 Specifications

General

Brand	Lennox
Model	CS7500
Category	Thermostat
Language	English