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display in low light conditions, and
allow for armchair programming.
CHECK BATTERY will be displayed
when the batteries are low. To assure
optimum performance, change
batteries once a year or when CHECK
BATTERY is displayed. When
changing batteries, always replace all
three batteries with new “AA” alkaline
batteries (for optimum performance,
we recommend Energizer
®
batteries).
If the batteries must be changed
frequently, it may indicate a problem
with the system. Contact the heating/
cooling system manufacturer or a
service person. Remember that
excessive use of the display light will
reduce battery life.
KK
KK
K
ee
ee
e
ypad Locypad Loc
ypad Locypad Loc
ypad Loc
kk
kk
k
out.out.
out.out.
out.
This security feature allows you to
lock out the keypad to prevent
unauthorized tampering with the
program. Two levels of security are
available, Total Keypad Lockout or
Partial Keypad Lockout. Total Keypad
Lockout renders all buttons inopera-
tive. Partial Keypad Lockout allows
only the
or to operate for
temporary temperature overrides. It
also limits the temperature to the
maximum heating and minimum
cooling temperatures used in your
program. This is especially useful in
buildings where unscheduled events
are common. Anyone can change the
temperature, but only between the
temperatures you set and only for two
hours or the number of hours you
specify if you set up your Hold Till
timing (see Temporary Program
Override, page 31). To select or
deselect this feature, refer to the
CONFIGURATION section (page 19,
steps 12 and 13).
TT
TT
T
herher
herher
her
mostamosta
mostamosta
mosta
t Start Star
t Start Star
t Star
tuptup
tuptup
tup
After After
After After
After
TT
TT
T
otal Potal P
otal Potal P
otal P
oo
oo
o
ww
ww
w
er Losser Loss
er Losser Loss
er Loss
..
..
.
On installation, or when power is
restored after a total power loss to the
thermostat, your thermostat will
automatically maintain a heating
temperature of 62°F (16°C) and a
cooling temperature of 85°F (29°C). A
total loss of power will occur when
you lose 24 VAC power to the
thermostat, and you have no battery
backup. If this happens, the thermostat
display will go blank in about one
minute after power loss.
When power is restored, the thermostat
will automatically return to the
temperatures listed above. If this
happens, set the clock and day of the
week (use steps 1 through 6 from
“Entering Your Program”, page 24),
then select HEAT, COOL or AUTO
using the
SYSTEM
. button, and press
PROGRAM
RUN
to resume operation
with your previously set program.