7
5.
Press or to adjust the temperature for the MORN event. Press
PROG
.
6.
Repeat steps 3-5 for the DAY, EVE and NIGHT events.
7.
Repeat steps 3-6 for the weekend (S, SU) program.
8.
If needed, repeat steps 2-7 to program the opposite mode (HEAT or COOL).
9.
Press
RETURN
to exit.
5
Operating Your Thermostat
Setting the System Control Mode
The System Control has several modes of operation that can be selected by
moving the SYSTEM switch to one of three positions.
COOL
Only your cooling system will operate
OFF
Heating and cooling systems are off
HEAT
Only your heating system will operate
Additional System Control Mode (Model TT-P-421):
EMER
Operates a backup heat source (Emergency Heat) for
heat pump systems only
NOTE:
If your model TT-P-421was set to a conventional system (NORM) then
you will not have the EMER (emergency heat) option and “NO AUX SET” will
flash in the display if EMER is selected with the system switch.
Setting the Fan Control Mode
The Fan Control has 2 modes of operation – AUTO and ON. The mode can
be selected by moving the FAN switch.
AUTO
The system fan will run only when your
heating or cooling system is running
ON
The system fan will stay on
Temperature Adjustment
Temporary Adjustment
– Press and hold the or button to adjust the
current set point temperature.
Extended Adjustment
– Press the
HOLD
button so that HOLD appears in
the display screen. Press or to adjust the current set temperature.
Status Indicators
Status indicators appear in the display to let you know if your system is
heating, cooling or off.
HEAT
If flashing,
indicates that your heating system is running
COOL
If flashing, indicates that your cooling system is running
FILT
Indicates that a service reminder has expired. Press
RETURN
button to reset timer and turn off FILT warning.
Additional status indicators (Model TT-P-421):
AUX
Indicates that the auxiliary stage of heating is running (multi-stage
systems only) or that the emergency heating system is running
(heat pump systems only).
