OPERATION
• LOW BATTERY INDICATOR — If the 2 “AA” alkaline batter-
ies are low and should be replaced, the display will be blank
except for “LO BATT”. We recommend replacing batteries
every 2 years. If the home is going to be unoccupied for an
extended period (over 3 months), the batteries should be
replaced before leaving. When the batteries are low, pressing
any button will cause the display to operated for ten seconds.
After ten seconds, the display will be blank except for “LO
BATT”. You cannot program with low batteries, but you can
override setpoint temperature. After “LO BATT” has been
displayed for 4 weeks, the thermostat will raise the tempera-
ture 10 degrees above your setpoint in COOL mode and will
drop the temperature 10 degrees below your setpoint in
HEAT mode. If the “LO BATT” condition continues, and
when it reaches certain value, the thermostat will turn off all
the loads and “LO BATT” will flash.
The system "mode" is selected by pressing the SYSTEM
button. Icons on the bottom right corner of the display will
indicatethemode:COOL ( ), AUTO (
),HEAT ( ),EMER,
or OFF. In any mode except OFF, the setpoint temperature will
be shown on the right side of the display. In OFF, this area will
be blank. The current temperature will be displayed on the left
side of the display.
To operate properly in the AUTO mode, the heat setpoint
temperature cannot be the same as or higher than the cool
setpoint temperature. The heat setpoint must be at least 1°
lower than the cool setpoint.
Automatic System Changeover
When the thermostat is in the AUTO mode, both the Flame and
Snowflake icons are displayed. The thermostat will call for heat
or cool depending on the room temperature. The setpoint
temperature displayed will be that of the last mode called. If the
lastsystemcyclewasheat, the HEAT setpointwillbedisplayed.
IftheroomtemperatureraisesabovetheHEAT setpointandthe
COOL setpoint and a call for cool is required, the temperature
displayed will change to be the COOL setpoint.
• SIMPLIFIED COPY DAY FUNCTION — This feature allows
Monday’s program to be copied into the rest of the week’s
programming. This feature is available the first time you
programmed your thermostat. To use this feature, simply
enter the program for Monday as described in ENTERING
YOUR PROGRAM, then press RUN or HOLD. The only way
to restore this feature is to complete a software reset (see
Reset Operation under TROUBLESHOOTING section).
Second Stage Time Delay
Your thermostat is designed to determine the optimum time to
activate the second stage. Simply raising the temperature in
heating or lowering it in cooling will not always force the
thermostat to bring the second stage on quickly. There is a time
delay from 0-30 minutes depending on the performance of the
first stage of the system.
• COPY DAY FUNCTION — This feature allows
a selected day’s program to be copied to the desired day’s
programming. To use this feature: in PRGM mode, select the
day to be copied from by pressing the HOLD button. Enter the
program for the selected day as described in ENTERING
YOUR PROGRAM. Press and hold the TIME button for 4
seconds to begin the COPY mode. The LCD will display
“COPY” and the selected day to be copied. The day the
program will copy to will be flashing. Press the HOLD button
to select the day you want to copy to. Press TIME to complete
the Copy Day operation and return to PRGM mode. Press
RUN to exit.
EXAMPLE: For the last 2 hours the thermostat is set on 70° and
the room temperature is 70° with the equipment using only the
first stage of heat. Since the equipment is keeping the tempera-
ture within 1° of setpoint, the thermostat will delay second stage
for a longer time if you manually raise the temperature or if the
room temperature quickly changes. Once the second stage
comes on, it will come on sooner the next time there is a
difference between the setpoint and the room temperature. The
net effect of the staging program is that when the first stage is
capable of making temperature the second stage will delay
longer. When the thermostat calculates that first stage cannot
make temperature in a reasonable time, the second stage will
come on sooner. This built in function automatically optimizes
the use of additional stages of heat or cool.
PROGRAMMING YOUR THERMOSTAT
This section will help you plan your thermostat's 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 temper-
atures to be cooler (warmer) when the building is vacant or
during periods of low activity.
Manual Operation
Permanent Program Override (HOLD) – With the SYSTEM
button set to HEAT or COOL, press the HOLD button once and
• During early morning hours, the need for cooling is usually
minimal.
Planning Your Program
release. “HOLD” will be displayed. Use
or
to adjust the
Look at the factory preprogrammed times and temperatures
shown in the sample schedule. If this program will suit your
needs, simply press the RUN button to begin running the factory
preset program.
temperature. The thermostat will hold the room temperature at
the selected setting until you press RUN button to start program
operation again.
Temperature Program Override – Press
or
until the
If you want to change the preprogrammed times and tempera-
tures, follow these steps.
display shows the temperature you want. The thermostat will
override current programming and keep the room temperature
at the selected temperature for a programmed time period.
“HOLD” will be displayed and flashing. The thermostat will
automatically revert to the program after programmed period.
Determine the time periods and temperatures for your program.
You can program four or two periods for each day (see Configu-
rationmenu, item2). Youmayusethesameheatingandcooling
temperatures for consecutive time periods. You can choose
start times, heating temperatures, and cooling temperatures
independently (for example, you may select 5:00 AM and 70° as
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