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24
battery will provide power for all functions. If the
word BAT is displayed continuously (non-flash-
ing), the thermostat is not being supplied with 24
VAC power and is being powered by the battery
alone.
Use
SYSTEM
HEAT-OFF-COOL-AUTO
to turn thermostat OFF before
removing thermostat from the wall to re-
place the battery.
2. You may adjust option switch #4 for automatic
changeover from heating to cooling (see OPER-
ATING FEATURES).
Other than and , the buttons are located
behind the thermostat door. To open the door, use
your fingernail in the indentation at the top center of
the door. Pull the door out, then swing the door down
on its hinges.
Following are brief descriptions of the display and
the thermostat buttons.
The Display
1
Continuously displays system mode (HEAT,
EMER, OFF, COOL, AUTO, HOLD). During
programming, the program period is displayed
(MOR, DAY, EVE, NHT).
2
Alternately displays room temperature (F de-
notes degrees Fahrenheit and C denotes de-
grees Celsius) and time of day (A denotes AM
time and P denotes PM time).
3
Displays the setpoint temperature.
4
5 DAY indicates that the displayed program is
the weekday program. 2 DAY indicates that the
displayed program is the weekend program.
5
The word BAT flashes on the display when the
9 volt alkaline battery is weak and should be
CAUTION
!