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6
PARTS OF THE THERMOSTAT
The Back of The Thermostat Body
Turn the thermostat body over. On the back are
the 3 “AA” Energizer
®
alkaline batteries and the
two option switch groups (A and B).
1. The “AA” Energizer
®
alkaline batteries pro-
vide power to the thermostat when the
24 VAC power is interrupted (for example,
when you remove the thermostat from the
wall for programming). Fresh batteries
will maintain the stored program for ap-
proximately a year. If power loss is long
enough for the program to be lost, the
thermostat will automatically return to the
factory programmed temperatures (64°F
heating and 82°F cooling) when power is
restored. You must reprogram the thermo-
stat if this happens.
If the word BATTERY is flashing in the
display window, the batteries are low and
should be replaced with fresh “AA” Ener-
gizer
®
alkaline batteries.
Use
SYSTEM
SWITCH
to turn the thermostat OFF
before removing the thermostat from the
wall to replace batteries.
2. You may adjust the option switches for
keypad lockout, limited temperature range,
and automatic changeover from heat to cool
(see OPERATING FEATURES).
CAUTION
!