White Rodgers 1F83-261 Installation and Operation Instructions

White Rodgers
Brand
White Rodgers
Model
1F83-261
Category
Thermostats
Type
Installation and Operation Instructions

White Rodgers 1F83-261 is a non-programmable electronic digital multi-stage thermostat, designed to provide precise time/temperature control for your home. It's compatible with heat/cool systems with up to two stages of heating and two stages of cooling. It also features a large, easy-to-read LCD display that continuously shows the current temperature and setpoint, as well as a backlit display that activates when any key is pressed.

White Rodgers 1F83-261 is a non-programmable electronic digital multi-stage thermostat, designed to provide precise time/temperature control for your home. It's compatible with heat/cool systems with up to two stages of heating and two stages of cooling. It also features a large, easy-to-read LCD display that continuously shows the current temperature and setpoint, as well as a backlit display that activates when any key is pressed.

WARNING
!
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Do not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damage
thermostat and could cause personal injury and/or
property damage.
Thermostat installation and all components of the
system shall conform to Class II circuits per the NEC
code.
1F83-261
Non-Programmable Electronic Digital
Multi-Stage Thermostat
INSTALLATION AND OPERATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
• Backlitdisplaywhenanykeyispushed
• °F/°Cconvertibility
• Temperaturerange45°to90°F
• R,C,W,W2,G,YandY2terminals
• OptionalCterminal(DualPoweroption)
• Setpointstorageincaseofpowerloss
• 2“AA”Energizer
®
alkalinebatteriesincluded
Operator: Save these instructions for future use!
YournewWhite-RodgersDigitalThermostatusesthetechnology
ofasolid-statemicrocomputertoprovideprecisetime/temperature
control.Thisthermostatoffersyoutheexibilitytodesignheating
andcoolingprogramsthattyourneeds.
Features:
• Simultaneousheatandcoolsetpointstorage
• Pre-settemperaturecontrol
• LCDcontinuouslydisplayssetpointandroomtemperature
PRECAUTIONS
Thisthermostatisintendedforusewithalowvoltagesystem;
donotusethisthermostatwithalinevoltagesystem.Ifindoubt
aboutwhetheryourwiringismillivolt,line,orlowvoltage,haveit
inspectedbyaqualiedheatingandairconditioningcontractor
orelectrician.
Donotexceedthespecicationratings.
Allwiringmustconformtolocalandnationalelectricalcodes
andordinances.
Thiscontrolisaprecisioninstrument,andshouldbehandled
carefully.Roughhandlingordistortingcomponentscouldcause
thecontroltomalfunction.
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
20to30VAC50/60Hz.orD.C.
0.05to1.5Amps(Loadperterminal)
1.5 Amps Maximum Total Load(Allterminalscombined)
THERMAL DATA
Setpoint Temperature Range:
45°Fto90°F(7°Cto32°C)
Operating Ambient Temperature Range:
32°Fto105°F
Operating Humidity Range:
0to90%RH(non-condensing)
Shipping Temperature Range:
-4°Fto150°F
APPLICATIONS
Forusewith:
• Heat/coolsystemswithuptotwostagesheat,
twostagescool
DO NOT USE WITH:
• Millivoltsystems
• Systemsexceeding30VACand1.5amps
• 3-wirezonedhydronicheatingsystems
PART NO. 37-6321B
Replaces37-6321A
1014
www.white-rodgers.com
www.emersonclimate.com
2
Mounting
holes
Mounting
holes
Electric/Gas
switch
Screw anchors
INSTALLATION
REMOVE OLD THERMOSTAT
1. Shutoffelectricityatthemainfuseboxuntilinstallationis
complete.Ensurethatelectricalpowerisdisconnected.
2. Removethefrontcoveroftheoldthermostat.With wires
still attached, remove wallplate fromthe wall. Ifthe old
thermostathasawallmountingplate,removethethermostat
andthewallmountingplateasanassembly.
3. Identify each wire attached to the old thermostat using
the labels enclosed with the new thermostat.
4. Disconnectthewiresfromoldthermostatoneatatime.DO
NOT LET WIRES FALL BACK INTO THE WALL.
5. Installnewthermostatusingthefollowingprocedures.
ATTENTION!
Thisproductdoesnotcontainmercury.However,thisproduct
mayreplaceaunitwhichcontainsmercury.
Donotopenmercurycells.Ifacellbecomesdamaged,donot
touchanyspilledmercury.Wearingnonabsorbentgloves,take
upthespilledmercurywithsandorotherabsorbentmaterialand
placeintoacontainerwhichcanbesealed.Ifacellbecomes
damaged,theunitshouldbediscarded.
Mercurymustnotbediscardedinhouseholdtrash.Whenthe
unitthisproductisreplacingistobediscarded,placeinasuit-
ablecontainer.Refertowww.white-rodgers.comforlocationto
sendproductcontainingmercury.
ELECTRIC HEAT SYSTEMS
Thisthermostatisconguredfromthefactorytooperateaheat/
cool,fossilfuel(gas,oil,etc.),forcedairsystem.Itiscongured
correctlyforanysystemthatDOESNOTrequirethethermostat
toenergizethefanonacallforheat.Ifyoursystemisanelectric
heatorheat-pumpsystemthatREQUIRESthethermostatto
turnonthefanonacallforheat,locatetheGAS/ELECTRIC
switch onthethermostatbase(seeg.1)andswitchittothe
ELECTRIC position.Thiswillallowthethermostattoenergizethe
fanimmediatelyonacallforheat.Ifyouareunsureiftheheating/
coolingsystemrequiresthethermostattocontrolthefan,contact
aqualiedheatingandairconditioningserviceperson.
ATTACH THERMOSTAT BASE TO WALL
1. Removethepackingmaterialfromthethermostat.Gently
pullthecoverstraightoffthebase.Forcingorpryingonthe
thermostatwillcausedamagetotheunit.Ifnecessary,move
theelectricheatswitch(seeELECTRIC HEAT SYSTEMS,
above).
2. Connectwiresbeneathterminalscrewsonbaseusingap-
propriatewiringschematic(seegs.2through4).
3. Placebaseoverholeinwallandmarkmountingholeloca-
tionsonwallusingbaseasatemplate.
4. Movebaseoutoftheway.Drillmountingholes.
5. Fastenbaselooselytowall,asshowning.1,usingtwo
mounting screws. Place a level against bottom of base,
adjustuntillevel,andthentightenscrews.(Levelingisfor
appearanceonlyandwillnotaffectthermostatoperation.)
Ifyouareusingexistingmountingholes,orifholesdrilled
aretoolargeanddonotallowyoutotightenbasesnugly,
useplasticscrewanchorstosecuresubbase.
6. Pushexcesswireintowallandplugholewithare-resistant
material(suchasberglassinsulation)topreventdraftsfrom
affectingthermostatoperation.
BATTERY LOCATION
2“AA”alkalinebatteriesareincludedinthethermostatatthe
factorywithabatterytagtopreventpowerdrainage.You must
remove the battery tag to engage the batteries.
IfBATTisdisplayed,thebatteriesarelowandshouldbereplaced
withfresh“AA”Energizer
®
alkalinebatteries.Toreplacebatteries,
installthebatteriesalongthetopofthebase(seeFig.1).The
batteriesmustbeinstalledwiththepositive(+)endtotheleft.
HYDRONIC (HOT WATER OR STEAM)
HEATING SYSTEMS
Thisthermostatissettooperateproperlywithaforced-airheat-
ingsystem.Ifyouhaveahydronicheatingsystem(asystem
thatheatswithhotwaterorsteam),youmustsetthethermostat
tooperateproperlywithyoursystem.Changethesecondop-
tionin thecongurationmenutoSL(see CONFIGURATION
MENU,page5).
Figure 1. Thermostat Base
3
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y W
W2
Figure 2. Typical wiring diagram for single transformer systems
Fan
Relay
G
TRANSFORMER
Compressor
Contactor
Stage 2
* The 24 Volt neutral connection
to terminal C on the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y W
W2
Figure 3. Typical wiring diagram for two-transformer systems with NO safety circuits
Fan
Relay
G
TRANSFORMER
Compressor
Contactor
Stage 2
24 VAC120 VAC
Hot
Neutral
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
CUT AND
TAPE OFF!
* The 24 Volt neutral connection
to terminal C on the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
24 VAC 120 VAC
Hot
Common
Common
Neutral
THERMOSTAT
SYSTEM
Y W
W2
Figure 4. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems
Fan
Relay
G
HEATING
TRANSFORMER
Compressor
Contactor
Stage 2
24 VAC 120 VAC
Hot
Neutral
COOLING
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
24 VAC
Accessory
Relay N.O.
Contact
* The 24 Volt neutral connection
to terminal C on the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
▲
NOTE
Thefollowingwiringdiagramsshowtypicalterminal
identicationandwiring.Forproperinstallation,refer
totheoriginalmanufacturer’sinstructions.
Relaycontactsshownarethermostaticallyoperated.
WIRING
4
Beforeyoubeginusingyourthermostat,youshouldbefamiliar
withitsfeaturesandwiththedisplayandthelocationandop-
erationofthethermostatbuttons.Yourthermostatconsistsof
twoparts:thethermostat cover andthebase.Toremovethe
cover,pullitstraightoutfromthebase.Toreplacethecover,
lineupthecoverwiththebaseandpressuntilthecoversnaps
ontothebase.
The Thermostat Buttons and Switches
(seegure5)
1
Raisestemperaturesetting.
2
Lowerstemperaturesetting.
3
FANswitch(ON,AUTO).
4
SYSTEMswitch(COOL,OFF,HEAT).
The Display
5
Flame icon( ) is displayed when the SYSTEM switch
isintheHEATposition.Snowflake icon( )isdisplayed
(non-ashing)whentheSYSTEMswitchisintheCOOL
position.Snowflakeisdisplayed(ashing)ifthethermostat
isinlockoutmodetopreventthecompressorfromcycling
tooquickly.
6
Displayscurrenttemperature.
7
DisplaysFILTERwhenthesystemhasrunfortheselected
ltertimeperiodasaremindertochangeorcleanyourair
lter.
8
Displayssetpointtemperature(thisisblankwhenSYSTEM
switchisintheOFFposition).
If at any time during testing your system does not operate
properly,contactaqualiedserviceperson.
Turnonpowertothesystem.
Fan Operation
Ifyoursystemdoes nothaveaGterminalconnection,skipto
Heating System.
1. MovefanswitchtoON position.Theblowershouldbegin
tooperate.
2. MovefanswitchtoAUTO position.Theblowershould
stopimmediately.
Heating System
1. MoveSYSTEMswitchtoHEATposition.Iftheheatingsystem
hasastandingpilot,besuretolightit.
2. Press
toadjustthermostatsettingaboveroomtempera-
ture.Theheatingsystemshouldbegintooperate.
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. MoveSYSTEMswitchtoCOOLposition.
2. Press
toadjustthermostatsettingbelowroomtempera-
ture.Theblowershouldcomeonimmediatelyonhighspeed,
followedbycoldaircirculation.
3. Bothstagesofthecoolingsystemshouldbegintooperate
whenthesetpointissetgreaterthan3°Fbelowambient.
4. Press
toadjusttemperaturesettingaboveroomtem-
perature.Thecoolingsystemshouldstopoperating.
Cooling System
2
1
3 4
5
8 79
56
Figure 5. Thermostat display, buttons, and switches
FAN SYSTEM
ON AUTO COOL OFF HEAT
F C
1 + 2
10
BATTERY FILTER
CHECK THERMOSTAT OPERATION
THERMOSTAT QUICK REFERENCE
9
Displays BATTERY and LO in the current temperature
locationwhenthe2“AA”batteriesarelowandshouldbe
replaced.
10
1indicates rststage isenergized. +2indicatessecond
stageisenergized.
3. Bothstagesoftheheatingsystemshouldbegintooperate
whenthesetpointissetgreaterthan3°Faboveambient.
4. Press
toadjusttemperaturesettingbelowroomtem-
perature.Theheatingsystemshouldstopoperating.
5
CONFIGURATION MENU
Thecongurationmenuallowsyouto setcertainthermostat
operatingcharacteristicsto yoursystemor personalrequire-
ments.
MoveSYSTEMswitchtotheOFFposition,thenpress
and
atthesametimetoenterthecongurationmenu.Thedisplay
willshowtherstiteminthecongurationmenu.
2) Select FA or SL (Fast or Slow) Heating Cycle Rate-The
FAsettingisfrequentlyusedforgas,oilorelectricheat.The
SLsettingproducesalongerheatingcyclewhichisnormally
for hot water or steam (hydronic) systems. Both settings
produceveryaccuratetemperaturecontrolandcanbeset
toyourpersonalpreference.FAcyclesthesystemjustunder
1°FandtheSLsettingcyclesatapproximately1.5°F.
3) Select Display Backlight (d-L OFF or ON)-Thedisplay
backlightimprovesdisplaycontrastinlowlightingconditions.
SelectingbacklightONwillkeepthelightonforashortperiod
oftimeafteranykeyispressed.SelectingOFFwillkeepthe
lightoff.
4) Select filter replacement run time-Thethermostat will
displayFILTER aftertheselectedtimeofoperation.Thisis
aremindertochangeorcleanyourairlter.Thistimecanbe
setfrom0to1950hoursin50hourincrements.A selection
of 000 will cancel this feature. WhenFILTERisdisplayed,
youcanclearitbypressing
and atthesametime.
Thisresetsthetimerandstartscountingthehoursuntilthe
nextlterchange.
5) Select Compressor Lockout (LOC OFF or ON)-Selecting
LOCONwillcausethethermostattowait5minutesbefore
INSTALLER/CONFIGURATION MENU
OPERATION
Thecongurationmenuchartbelowsummarizesthecongura-
tionoptions.Anexplanationofeachoptionfollows.
Press
and atthesametimetochangetothenextmenu
item.Toexitthemenu,movetheSYSTEMswitchtoHEATor
COOL.Ifnokeysarepressedwithinfteenminutes,thether-
mostatwillexitthecongurationmenu.
1
Step
Press or to select:
COMMENTS
Displayed (Factory Default)Press Button(s)
2
(FA)
SL
5
6
7
8
0HI
(0)
4LOto
4HI
(F)
C
1+2
FA
(ON)
OFF
Selecttemperaturedisplayadjustmenthigherorlower
SelecttemperaturedisplaytoForC
SelectONtostart2ndstageimmediatelywhenthesetpoint
ismanuallyraisedmorethan3°FinHEATorloweredmore
than3°FinCOOLfromroomtemperature.
4
FILTER
(000)
0to1950hours
(in50hourincrements)
SelectFilterreplacementruntime
LOC
(OFF)
ON
SelectCompressorlockoutOFForON
SelectFAorSL(FastorSlow)heatingcyclerate
Configuration Menu
3
d-L
(ON)
OFF
SelectdisplaybacklightOFForON
and
and
and
9
and
and
and
and
SetSYSTEM
switchtoOFF
SYSTEMswitchmustbeOFFtoconfigurethermostatoptions
SetSYSTEMswitch
toHEATorCOOL
Returnstonormaloperation
turningonthecompressoriftheheatingandcoolingsystem
losespower.Itwillalsowait5minutesminimumbetween
coolingcycles.Thisisintendedtohelpprotectthecompres-
sorfromshortcycling.Somenewercompressorsalready
haveatimedelaybuiltinanddonot requirethisfeature.
Yourcompressormanufacturercantellyouifthefeatureis
alreadypresentintheirsystem.Whenthecompressortime
delayoccursitwillashthe(snowakeicon)foraboutve
minutesthenturnonthecompressor.
6) Select Temperature Display Adjustment (4 LO to 4
HI) -Allowsyoutoadjusttheroomtemperaturedisplay4°
higherorlower.Yourthermostatwasaccuratelycalibrated
atthefactorybutyouhavetheoptiontochangethedisplay
temperaturetomatchyourpreviousthermostat.
7) Select Temperature DIsplay (°F or °C) -Changesthedisplay
readouttoCelsiusorFahrenheitasrequired.
8) Select Stage Fast (ON or OFF) -WhenselectedON,the
secondstage starts assoon asthesetpoint temperature
ismanuallyraised3°Finheatorlowered3°Fincoolfrom
roomtemperature.WhenselectedOFF,thesecondstage
willdelayapproximately15minutesbeforestarting.
OPERATING FEATURES
Nowthatyouarefamiliarwiththethermostatbuttonsanddisplay,
readthefollowinginformationtolearnaboutthemanyfeatures
ofthethermostat.
• SIMULTANEOUS HEATING/COOLING SETPOINT
STORAGE —Youcanenterbothyourheatingandcooling
setpointsatthesametime.Thereisnoneedtochangethe
thermostatatthebeginningofeachseason.
• CONFIGURATION MENU—Allowsyoutocustomizecertain
thermostatoptions.
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM
switchtoeitherHEATorCOOLthenpress
or untilthe
temperatureyouwanttomaintainisshownontherightside
ofthedisplay.Ifyouwanttoturnthesystemoff,justmovethe
SYSTEMswitchtoOFF.
The FAN switch controls the fan operation. When the FAN
switchissettoAUTO,thefanwillcyclewiththefurnaceorair
conditioner.WhentheFANswitchissettoON,thefanwillrun
continuously,regardlessofSYSTEMswitchposition.
6
TROUBLESHOOTING
Reset Operation
Ifavoltagespikeorstaticdischargeblanksoutthedisplayor
causeserraticthermostatoperationyoucanresetthethermostat
bypressing
, andmovetheSYSTEMswitchfromOFFto
HEATatthesametime.This also resets the factory defaults
to the configuration menu.Ifthethermostathaspower,has
been reset and still does not function correctly contactyour
heating/coolingservicepersonorplaceofpurchase.
Batteries
Foroptimumperformance,werecommendreplacingbatteries
onceayearwithfresh“AA”Energizer
®
alkalinebatteries.
Symptom Possible Cause Corrective Action
No Heat/No Cool/No Fan
(common problems)
Blownfuseortrippedcircuitbreaker.1.
FurnacepowerswitchtoOFF.2.
Furnaceblowercompartmentdooror3.
panellooseornotproperlyinstalled.
Replacefuseorresetbreaker.
TurnswitchtoON.
Replacedoorpanelinproperpositiontoengagesafety
interlockordoorswitch.
No Heat
Pilotlightnotlit.1.
SystemSwitchnotsettoHeat.2.
Looseconnectiontothermostatorsystem.3.
FurnaceLock-OutCondition.Heatmay4.
alsobeintermittent.
HeatingSystemrequiredserviceor5.
thermostatrequiresreplacement.
Re-lightpilot.
SetSystemSwitchtoHeatandraisesetpointabove
roomtemperature.
Verifythermostatandsystemwiresaresecurelyat-
tached.
Manyfurnaceshavesafetydevicesthatshutthesystem
downwhenalock-outconditionoccurs.Iftheheatworks
intermittentlycontactthefurnacemanufacturerorlocal
servicepersonforassistance.
Diagnostic:SetSystemSwitchtoHeatandraisethe
setpointaboveroomtemperature.Withinafewseconds
thethermostatshouldmakeasoftclicksound.This
soundusuallyindicatesthethermostatisoperating
properly.Ifthethermostatdoesnotclick,trythereset
operationlistedabove.Ifthethermostatdoesnotclick
afterbeingresetcontactyourheatingandcooling
servicepersonorplaceofpurchaseforareplacement.
Ifthethermostatclicks,contactthefurnacemanufac-
tureroraservicepersontoverifytheheatingsystemis
operatingcorrectly.
No Cool
SystemSwitchnotsettoCool.1.
Looseconnectiontothermostatorsystem.2.
CoolingSystemrequiresserviceor3.
thermostatrequiresreplacement.
SetSystemSwitchtoCoolandlowersetpointbelow
roomtemperature.
Verifythermostatandsystemwiresaresecurely
attached.
SameprocedureasdiagnosticforNoHeatcondition
exceptsetthethermostattoCoolandlowerthesetpoint
belowtheroomtemperature.Theremaybeuptoave
minutedelaybeforethethermostatclicksinCooling
ifthecompressorlock-outoptionisselectedinthe
congurationmenu(Item6).
Heat, Cool or Fan Runs Constantly
FanSwitchsettoFanOn.1.
Possibleshortinwiring.2.
Possibleshortinthermostat.3.
PossibleshortinHeat/Cool/Fansystem.4.
Checkeachwireconnectiontoverifytheyarenot
shortedortouchingtogether.Nobarewireshould
stickoutfromunderterminalscrews.Tryresettingthe
thermostat.Iftheconditionpersists,themanufacturerof
yoursystemorservicepersoncaninstructyouonhow
totesttheHeat/Coolsystemforcorrectoperation.Ifthe
systemoperatescorrectly,replacethethermostat.
Furnace Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Thelocationofthethermostatand/or1.
thesizeoftheHeatingSystemmaybe
inuencingthecyclerate.
Item2intheCongurationMenuistheadjustment
thatcontrolsthecyclerate.Ifanacceptablecycle
rateisnotachievedusingtheFA(Fast)orSL(Slow)
adjustmentcontactalocalservicepersonforadditional
suggestions.
Cooling Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
Thelocationofthethermostatand/or1.
thesizeoftheCoolingSystemmaybe
inuencingthecyclerate.
Thecyclerateforcoolingisxedandcannotbe
adjusted.Contactalocalservicepersonforsuggestions.
Thermostat Setting and Thermometer
Disagree
Thermostatthermometersettingrequires1.
adjustment.
Thethermometercanbeadjusted+/-4degreesas
listedinitem7oftheCongurationMenu.Noother
adjustmentispossible.
Blank Display and/or Keypad Not
Responding
Lossofpoweranddeadbatteries.1.
VoltageSpikeorStaticDischarge.2.
Replacebatteriesandcheckheat/coolsystemfor
properoperation.Ifavoltagespikeorstaticoccursuse
theResetOperationlistedabove.
7
NOTES
www.white-rodgers.com
www.emersonclimate.com
HOMEOWNER HELP LINE: 1-800-284-2925
White-Rodgersisadivision
ofEmersonElectricCo.
TheEmersonlogoisa
trademarkandservicemark
ofEmersonElectricCo.
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White Rodgers 1F83-261 Installation and Operation Instructions

White Rodgers
Brand
White Rodgers
Model
1F83-261
Category
Thermostats
Type
Installation and Operation Instructions

White Rodgers 1F83-261 is a non-programmable electronic digital multi-stage thermostat, designed to provide precise time/temperature control for your home. It's compatible with heat/cool systems with up to two stages of heating and two stages of cooling. It also features a large, easy-to-read LCD display that continuously shows the current temperature and setpoint, as well as a backlit display that activates when any key is pressed.

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