7
5. Pressortoadjustthetemperatureforthe
MORNevent.PressPROG.
6. Repeatsteps3-5fortheDAY,EVEandNIGHTevents.
7. Repeatsteps3-6fortheweekend(S,SU)program.
8.
Ifneeded,repeatsteps2-7toprogramtheoppositemode(HEATorCOOL).
9. PressRETURNtoexit.
5
Operating Your Thermostat
Setting the System Control Mode
TheSystemControlhasseveralmodesofoperationthatcanbeselectedby
movingtheSYSTEMswitchtooneofthreepositions.
COOL
Onlyyourcoolingsystemwilloperate
OFF Heatingandcoolingsystemsareoff
HEAT Onlyyourheatingsystemwilloperate
Additional System Control Mode (Model TT-P-421):
EMER Operatesabackupheatsource(EmergencyHeat)for
heatpumpsystemsonly
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
TheFanControlhas2modesofoperation–AUTOandON.Themodecan
beselectedbymovingtheFANswitch.
AUTO Thesystemfanwillrunonlywhenyour
heatingorcoolingsystemisrunning
ON Thesystemfanwillstayon
Temperature Adjustment
Temporary Adjustment–Pressandholdtheorbuttontoadjustthe
currentsetpointtemperature.
Extended Adjustment–PresstheHOLDbuttonsothatHOLDappearsin
thedisplayscreen.Pressortoadjustthecurrentsettemperature.
Status Indicators
Statusindicatorsappearinthedisplaytoletyouknowifyoursystemis
heating,coolingoroff.
HEAT
Ifashing, indicatesthatyourheating
systemisrunning
COOL
Ifashing,indicatesthatyourcooling
systemisrunning
FILT Indicatesthataservicereminderhasexpired.PressRETURN
buttontoresettimerandturnoffFILTwarning.
Additional status indicators (Model TT-P-421):
AUX Indicatesthattheauxiliarystageofheatingisrunning(multi-stage
systemsonly)orthattheemergencyheatingsystemisrunning
(heatpumpsystemsonly).