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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.
Table 6.
Humiditrol Comfort Adjust Parameters
Humiditrol Comfort Adjust parameters
Maximum overcooling
Midpoint overcooling
Minimum overcooling
2.8.
Dehumidification Requirements
Humiditrol can only operate when the thermostat is set to COOL or AUTO and
meets the parameters described in the following table. If the thermostat is set to
HEAT mode, no dehumidification will occur! Thermostat cycles heating ON and
OFF to maintain heating setpoint.
Table 7.
Thermostat Operation with Humiditrol Enabled
Thermostat set to COOL mode-
Dehumidification will only occur if:
•
O utdoor sensor on room thermostat
installed and setup
•
D ehumidification enabled on installer
settings
•
D ehumidification demand is present
•
C ooling demand is not present
•
O utdoor temperature is less then 95ºF
•
I ndoor temperature is not cooler than
65ºF
If the conditions above are met, 24VAC is
removed from the Humiditrol "D" terminal
and cooling begins (Indoor variable speed
motor runs at de h umidification speed and
outdoor unit begins the cooling cycle).
Cooling calls have priority over Humiditrol
calls.
Humiditrol mode overcooling is user adjustable and is described in Using Humiditrol Comfort
Adjust.
Indoor temperature is greater than:
2% above heating setpoint
Heat Setpoint+Cool Setpoint
2
2°F below cooling set point
Thermostat set to AUTO changeover-
Dehumidification will only occur if:
• Outdoor sensor on room thermostat installed and
setup
• Dehumidification enabled on installer settings
• Dehumidification demand is present
• Cooling demand is not present
• Outdoor temperature is less then 95ºF
• Indoor temperature is not cooler than 65ºF
• Indoor temperature is not cooler than 2ºF above
heating setpoint.
In this case, 24VAC is removed from the Humiditrol
"D" terminal and cooling begins (Indoor variable
speed motor runs at dehumidification speed and
outdoor unit begins the cooling cycle). Cooling calls
have priority over Humiditrol calls. Humiditrol mode
overcooling is user adjust able and is described in
Using Humiditrol Comfort Adjust.
START
Is
there a heating
demand
YES
?
RUN EQUIPMENT
NO
IN NORMAL
HEATING MODE
Is
there a cooling
demand
YES
?
RUN EQUIPMENT
NO
IN NORMAL
COOLING MODE
Is
there a
dehumidification
NO
demand
?
YES
DEACTIVATE
DEACTIVATE
ALL EQUIPMENT
ALL EQUIPMENT
Is
EITHER true:
one or both
outdoor temp. > 95ºF;
is true
indoor temp. < 65ºF
?
Figure 20. Thermostat Operation with Humiditrol Enabled
3.
e
t
nablInG
hermostats for
3.1.
CS7500 Residential Thermostat
1 . Touch menu option from the
home screen.
2 . Touch and hold the settings option on the
menu. This will display the installer settings
confirmation screen. Touch confirm
ue.
A selection option under Installer settings > Humidity settings > Dehumidify > Dehumidify mode must be enabled
before
tive humidity (RH). The installer settings include:
1 . NORMAL
2 . MAX
3 . AUXILIARY DEHUMIDIFIER
4 . HUMIDITROL
5 . OFF
Installing Outdoor Sensor
Install the
light or other heat sources that may affect its sensitivity.
NOTE - The outdoor sensor uses standard thermostat wiring; it may be wired using two wires of a multi-wire cable
with a wire run not to exceed 300 feet or 100 meters.
1 . Connect outdoor sensor to terminals Tc and To on thermostat.
2 . Outdoor sensor also has to be enabled under menu > settings > outdoor sensor = yes or no.
Figure 21. ComfortSense 7500 Thermostat—Add and Adjust Humiditrol
20
RUN
HUMIDITROL
Is
indoor
temperature
greater than 2ºF
above heating set
YES
point
?
NO
Is
indoor temp.
Humiditrol
greater than the heat
Comfort Adjust
setpoint plus the cool
setting is:
setpoint divided by 2?
YES
NO
Is
indoor
temperature
greater than 2ºF
NO
below cooling set
point
?
neither
YES
is true
h
umIdItrol
installer settings
<
installer settings must be set
by qualified person.
confirm
NOTE - Humiditrol operation requires
use of an outdoor sensor. If sensor is not
connected enable plus Humiditrol selected.
played in the information display.
LEGEND:
CSP = Cooling Set Point
HSP = Heating Set Point
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