Heat
Heat Set
Day
Some symbols and display functions are normally hidden from view until needed or may not appear
based on the thermostat configuration. Make sure your contractor configures the T-21-P to suit your
specific needs.
Clean
Screen
Locked
Clean Screen
Touching this button
when shown will lock
out all thermostat functions
for 30 seconds to
permit cleaning
the display screen
Up and Down Arrows
Used to set temperature,
time, day of week
and other values
Lock
Padlock symbol
indicates that the selected
function is prohibited or
the setpoint limit
has been reached
Battery
Shown when battery
needs to be replaced
Flt (Filter)
Optional filter reminder
alternates with
the current time
(Reset by touching both
Mode and Fan)
BASIC FUNCTIONS
Setting the clock
Touch the clock on the display. The day of the week will flash. Use the UP and DOWN arrows to
adjust the day. Touch the clock again. The hour will flash. Use the UP and DOWN arrows to adjust
the hour. If the time is PM, adjust the hour until the PM symbol appears. Touch the clock again. The
minutes will flash. Use the UP and DOWN arrows to adjust the minutes. Touch the clock again and
the thermostat will resume normal operation.
E
E
RESIDENTIAL 5-2 DAY PROGRAMMING MODE
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