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15.I live in an area where daylight savings time is
observed. How do I change the thermostat
clock twice a year without affecting thermo-
stat programming?
To change your clock, follow the instructions for
setting current time and day. See ENTERING
YOUR PROGRAM. Thermostat programming is
not affected when you change the clock.
17.Do I have to re-program my thermostat after
I change the battery?
When the thermostat is on the wall and the
system has power, the thermostat is being pow-
ered by a 24v AC source. If power is lost, or if the
thermostat is removed from the wall, the pro-
gram will be retained for approximately one
minute if there is no battery installed or if the
installed battery is dead. If you are changing the
battery after seeing a flashing BAT on the dis-
play, the installed battery may be dead. If you
remove the old battery and install a fresh one
within one minute, you may not lose your thermo-
stat programming. After installing a new battery,
follow the procedures in CHECK YOUR PRO-
GRAMMING to determine whether your pro-
gramming was maintained. If the thermostat
maintains programming, press
SYSTEM
HEAT-OFF-COOL-AUTO
until
OFF is displayed, put the thermostat back on the
wall, press
SYSTEM
HEAT-OFF-COOL-AUTO
to select the operating mode
you want, then press
RUN
PRGM
to start program
operation. If the program is lost, re-program the
thermostat. See PROGRAMMING YOUR THER-
MOSTAT.