Parts Of The Thermostat; The Back Of The Thermostat Body - American Standard ASYSTAT656 Operation Manual

connectors on the upper portion of the thermo-
stat back. Gently push until the snap connec-
tors engage. DO NOT FORCE OR PRY THE
THERMOSTAT, as this may damage the unit.

PARTS OF THE THERMOSTAT

The Back of The Thermostat Body

Turn the thermostat body over. On the back is
the 9 volt alkaline battery and the option switches.
See INSTALLERS GUIDE for option switch op-
eration.
1. The 9 volt alkaline battery provides power to
the thermostat when the 24VAC power is
interrupted (for example, when you remove
the thermostat from the wall for program-
ming). A fresh battery will maintain the
stored program for approximately one week.
6
If power loss is long enough for the program to
be lost, the thermostat will automatically re-
turn 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 BAT is flashing in the display
window, the battery is low and should be
replaced with a fresh 9 volt alkaline battery.
The battery will provide power for all functions
except the display light which works only on
24VAC power.
CAUTION
!
Before removing thermostat from the wall to
replace the batteries, DISCONNECT 24VAC
power from the thermostat at the breaker/
fuse box. Backlight will not come on when
24VAC power has been disconnected.