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1. The 9 volt Energizer
®
alkaline battery pro-
vides power to the thermostat when the
24 VAC power is interrupted (for example,
when you remove the thermostat from the
wall for programming). A fresh battery will
maintain the stored program for approxi-
mately one week. If power loss is long
enough for the program to be lost, the
thermostat will automatically maintain a
factory preprogrammed heating tempera-
ture of 64°F and a cooling temperature of
82°F after power is restored. You must
reprogram the thermostat if this happens.
If the word BAT is flashing in the display
window, the battery is low and should be
replaced with a fresh 9 volt Energizer
®
alkaline battery. The battery will provide
power for all functions except the display
light and audio prompting, which work only
on 24 VAC power.
2. You may adjust option switch #4 for auto-
matic changeover from heating to cooling
(see OPERATING FEATURES).