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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 9 volt Energizer
®
alkaline battery and the
option switches.
1. The 9 volt Energizer
®
alkaline battery pro-
vides power to the thermostat when the
24VAC 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 a week. If power loss is long enough
for the program to be lost, the thermostat
will automatically return to the factory pro-
grammed temperatures (64°F heating and
82°F cooling) when power is restored. You
must reprogram the thermostat if this hap-
pens.
If the word BATTERY 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 beep,
which work only on 24VAC power.
Use
SYSTEM
SWITCH
to turn thermostat to OFF
mode before removing thermostat from
the wall to replace the battery.
CAUTION
!