9
THE SMART SOLUTION FOR ENERGY EFFICIENCY
ATA11U03
Rev.:09/16/13
OPERATION
Mode Selection—Themodebuttonallowstheuserto
displaytheoff,heat,cool,autoicons.Pressingthemode
buttoncyclesthroughtheavailablemodesbasedonthe
equipmentselectionfromOption15.Availablechoices
arelistedinTable2.
Table 2: Mode Selection
Fan Selection —Thethermostatofferstwocontinuous
(ON)ortwocycling(AUTO)andtwofanspeedshigh(HI)
orlow(LO).Pressingthefanbuttoncyclesthroughthe
followingdisplaysfanonLO,fanonHI,autofanLO,auto
fan HI.
Fan Display—IfOption39issettodisplaysetpoint
(SP),thenthetwo-speedfansettingremainsonthe
display.Ifthecurrentfanspeedisnotshownonthe
display,therstpressofthefanbuttonwilldisplaythe
currentselection.Thefanselectioncanonlybechanged
byafanbuttonpresswhenthecurrentselectionisshown
onthedisplay.SeeFig.6.
IfOption39issettodisplaythespacetemperature(St),
thenthetwo-speedfansetting(LOorHI)remainsonthe
displayforthreesecondsafterthelastpressofthefan
button.
Figure 6: Current Fan Selection Display
Set Temperature Selection—Ifautomodeisnot
activeandoffmodeisnotactive,pressingtheupor
downbuttoncausesthesetpointcorrespondingtothe
currentsystemmodetobeupdated.Iftheupordown
buttonisheld,thesetpointvaluewillbescrolled.The
setpointchangealsotakesintoaccountthatOption11
(deadband)ispreservedalongwithensuringthatOption
26(minimumcoolingsetpoint)andOption27(maximum
heatingsetpoint)aretakenintoaccounttoenforceset
pointlimits.
Ifautomodeisactive,pressingtheupordownbutton
causesthesetpointcorrespondingtothecurrent
operatingmodetobeupdated.Tomovebetweenthe
heatandcoolsetpoints,pressthemodebuttonto
togglebetweensetpoints.Oncethedesiredsetpoint
hasbeenadjusted,pressthemodebuttontoreturnto
automode.
Ifoffmodeisactive,theupanddownbuttonsare
ignoredforchangingsetpoint(s).
Whenchangingthesetpoints,thefollowingrestrictions
areinplace.Thecoolsetpointcannotbeincreased
above90degreesF(32C)ordecreasedbelowOption
26,theminimumcoolingsetpoint.Theheatsetpoint
cannotbedecreasedbelow50F(10C)orincreased
aboveOption27,themaximumheatingsetpoint.
WhenOption39issettoSP(setpoint),thesetpoint
adjustmentisdisplayedinthelargespacetemperature
digits.
Display Lighting—Thedisplayhastwolevelsof
lighting,highlevelandlowlevel.Highlevellighting
comesonfor10secondswhenbuttonsarebeing
pressed.Thelowlevelcanbeselected(seeOption18)
forcontinuousbacklight.
Remote Sensor Temperature Display — Pressing
theupanddownbuttonssimultaneouslydisplaysthe
temperatureofthesensorconnectedtotheS1andS2
terminalsforveseconds,thenthethermostatreturnsto
normaloperation.
Ifthesensorisinvalid,thenthedisplayshows“--”inthe
largetemperaturedisplaydigits.
OPTION 15 AVAILABLE MODES
On Off, Heat Cool, Auto
Off Off, Heat, Cool