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T8624D CHRONOTHERM
®
IV DELUXE PROGRAMMABLE THERMOSTAT
68-0166—1
6
SETTINGS
Using Thermostat Keys
The thermostat keys are used to:
• set current day and time,
• program times and setpoints for heating and cooling,
• temporarily override program temperatures,
• display present setting,
• configure Installer Setup,
• check System Test,
• display outdoor temperature (select models),
• set the system operation,
• set the fan operation.
See Fig. 6 for the location of the keys.
System and Fan Settings
The system default setting is Heat and the fan default setting
is Auto. Use the System and Fan keys or switches to change
the settings. See Fig. 7. The fan settings can be set for each
program period individually. The system selection is for all the
program periods.
System settings control the thermostat operation as follows:
Heat: The thermostat controls the heating.
Off: Both the heating and cooling are off.
Cool: The thermostat controls the cooling.
Auto: The thermostat automatically changes between
heating and cooling operation, depending on the indoor
temperature.
Fan settings control the system fan as follows:
On: Fan operates continuously.
Auto: Fan operates with equipment.
Fig. 7. T8624D System and Fan key locations.
Fig. 6. T8624D key locations and descriptions.
M15042
Hold Temp
Run
Program
Copy
Daylight
Time
Set Current
Day/Time
System Fan
Time Set Program
Day
System
Fan
Wake
Leave
Return
Sleep
Heat/Cool
Settings
M10405A
Time Set Program
System Fan
Run
Program
Hold Temp
Set Current
Day/Time
Wake
Leave
Return Sleep
Day
Heat/Cool
Settings
Daylight
Time
Copy
INCREASE TEMPERATURE
SETTING OR SCROLL
FORWARD THROUGH
INSTALLER SETUP OPTIONS
DECREASE TEMPERATURE
SETTING OR SCROLL
BACKWARD THROUGH
INSTALLER SETUP OPTIONS
DISPLAY INFORMATION
SUCH AS PRESENT
SETTINGS AND OUTDOOR
TEMPERATURE
RETURN TO
NORMAL
OPERATIONS
ENTER
INDEFINITE
OR TIMED
HOLD MODE
SET CURRENT
DAY AND TIME
SET CURRENT OR
PROGRAM DAY
CHANGE BETWEEN
DAYLIGHT SAVINGS
AND STANDARD TIME
INCREASE TIME SETTING
OR SCROLL FORWARD
THROUGH INSTALLER SETUP
AND SYSTEM TEST
DECREASE TIME SETTING OR SCROLL
BACKWARD THROUGH INSTALLER
SETUP AND SYSTEM TEST
COPY ONE PROGRAMMED
DAY TO ANOTHER DAY
SET WAKE TIMES
AND SETPOINTS
CHANGE BETWEEN HEATING
AND COOLING SETPOINTS
SET LEAVE TIMES
AND SETPOINTS
SET RETURN TIMES
AND SETPOINTS
SET SLEEP
TIMES AND
SETPOINTS
SELECT SYSTEM
OPERATION
SELECT FAN
OPERATION