Emerson 850 Thermostat User Manual


 
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PROGRAMMING YOUR THERMOSTAT
6
This section will help you plan your thermostats program to meet
your needs. For maximum comfort and efficiency, keep the
following guidelines in mind when planning your program.
When heating (cooling) your building, program the tempera-
tures to be cooler (warmer) when the building is vacant or
during periods of low activity.
During early morning hours, the need for cooling is usually
minimal.
Look at the factory preprogrammed times and temperatures shown
below. If this program will suit your needs, simply press the RUN
button to begin running the factory preset program.
If you want to change the preprogrammed times and tempera-
tures, follow these steps.
Determine the time periods and temperatures for your weekday
and weekend programs. You must program four periods for both
the weekday and weekend program. However, you may use the
same heating and cooling temperatures for consecutive time
periods. You can choose start times, heating temperatures, and
cooling temperatures independently for both weekday and week-
end programs (for example, you may select 5:00 AM and 70° as
the weekday 1st period heating start time and temperature, and
also choose 7:00 AM and 76° as the weekday 1st period cooling
start time and temperature). Use the table at the bottom of the
page to plan your program time periods and the temperatures you
want during each period. You may also want to look at the sample
program table to get an idea of how the thermostat can be
programmed.
Entering Your Program
Follow these steps to enter the heating and cooling programs you
have selected.
Set Current Time and Day
1. Press TIME button once. The display will show the hour only.
EXAMPLE:
PM
2. Press and hold either or until you reach the correct
hour and AM/PM designation (AM begins at midnight; PM
begins at noon).
3. Press TIME once. The display window will show the minutes
only.
EXAMPLE:
4. Press and hold either or until you reach the correct
minutes.
5. Press TIME once. The display will show the day of the week.
6. Press or until you reach the current day of the week.
7. Press RUN once. The display will show the correct time and
room temperature alternately.
Enter Heating Program
1. Move the SYSTEM switch to HEAT.
2. Press PRGM once. MO TU WE TH FR (indicating weekday
program) will appear in the display. Also displayed are the
currently programmed start time for the 1st heating period and
the currently programmed temperature (flashing).
EXAMPLE:
AM
MO TU WETH FR
This display window shows that for the 1st weekday period,
the start time is 6:00 AM, and 70° is the programmed tempera-
ture (this example reflects factory preprogramming).
3. Press or to change the displayed temperature to your
selected temperature for the 1st heating program period.
4. Press TIME once (the programmed time will flash). Press
or until your selected time appears. The time will change
in 15 minute increments. When your selected time is dis-
played, press TIME again to return to the change temperature
mode.
5. Press PRGM once. The currently programmed start time and
setpoint temperature for the 2nd heating program period will
appear.
6. Repeat steps 3 through 5 to select the start time and heating
temperature for the 2nd heating program period.
WEEKDAY (5 DAY)
SATURDAY (1 DAY)
Start
Time Temperature
Start
Time Temperature
1ST 6:00 AM 70˚F 6:00 AM 70˚F 6:00 AM 70˚F
2ND 8:00 AM 62˚F 8:00 AM 62˚F 8:00 AM 62˚F
3RD 5:00 PM 70˚F 5:00 PM 70˚F 5:00 PM 70˚F
4TH 10:00 PM 62˚F 10:00 PM 62˚F 10:00 PM 62˚F
1ST 6:00 AM 78˚F 6:00 AM 78˚F 6:00 AM 78˚F
2ND 8:00 AM 85˚F 8:00 AM 85˚F 8:00 AM 85˚F
3RD 5:00 PM 78˚F 5:00 PM 78˚F 5:00 PM 78˚F
4TH 10:00 PM 82˚F 10:00 PM 82˚F 10:00 PM 82˚F
SAMPLE
Heating/Cooling Schedule Plan (Factory Program)
Period
SUNDAY (1 DAY)
Start
Time Temperature
COOL HEAT
WEEKDAY (5 DAY)
SATURDAY (1 DAY)
Start
Time Temperature
Start
Time Temperature
1ST
2ND
3RD
4TH
1ST
2ND
3RD
4TH
SAMPLE
Heating/Cooling Schedule Plan (Factory Program)
Period
SUNDAY (1 DAY)
Start
Time Temperature
COOL HEAT
CHECK THERMOSTAT OPERATION
CONTINUED FROM FIFTH PAGE
5
HOLD TEMPERATURE The thermostat can hold any
temperature within its range for an indefinite period without
reverting to the programmed temperature. Momentarily press
HOLD button. HOLD will be displayed. Then choose the
desired temperature by pressing
or . The thermostat
will hold the room temperature at the selected setting until
you press RUN button to start program operation again.
CONFIGURATION MENU Allows you to customize cer-
tain thermostat options.