Smart temp SMT?770 User guide

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InstallerManual
SMT‐770ChameleonMultifunctionThermostat
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Ver1.0

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Thisdocumentitnottypicallyleftwiththeuserasitcontainsinformationonsetting
valueswhich,ifnotcorrectlysetmaydamagetheheating,coolingorairconditioning
systemorseriouslyaffectitsperformanceorenergyconsumption.
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GreatefforthasbeentakentomakingtheSMT‐770thermostatsystemintuitive,
reliableandeasytoinstall.Usingacommonsenseapproachtotheinstallationwill
ensurethisproductisinstalledeasilyandtothecustomer’ssatisfaction.Pleaseread
andunderstandthisinstructionmanualsothatinstallation,testingandcommissioning
processisundertakeninanefficientandeffectivemanner.
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Thismanualistobeusedinconjunctionwiththesuppliedusermanual.
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Greatcarehasbeentakeninthepreparationofthismanual.SmartTempAustraliaP/Ltakesno
responsibilityforerrorsoromissionscontainedinthisdocument.Itistheresponsibilityoftheuser
toensurethisthermostat,ortheequipmentconnectedtoitisoperatingtotheirrespective
specificationsandinasafemanner.
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DuetoongoingproductimprovementSmartTempAustraliaP/Lreservestherighttochangethe
specificationsoftheSMT‐770thermostat(oritscomponents)withoutnotice.
Allrightsreserved.©SmartTempAustraliaP/L2006
Intellectualrightsapply.

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TableofContents
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Installation..................................................................................................................4
Mountingthewallcontroller..............................................................................................5
Settingthehardwareswitches...........................................................................................6
TTTerminalFunctions..................................................................................................9
OutsideAirSensorwiring.................................................................................................10
RemoteAirTemperaturesensorwiring............................................................................10
AveragingTemperaturesensors.......................................................................................11
RemoteON/OFFfunction...............................................................................................11
Usingthe“OccupancyMode”...........................................................................................11
TypicalDrawings........................................................................................................12
Attachingthethermostat...........................................................................................16
AdvancedInstallerSettings........................................................................................17
Commissioning..........................................................................................................28
UsingRemoteTemperatureSensors...........................................................................31
AdvancedFunctions...................................................................................................32
Specifications.............................................................................................................36
SensorReferenceTable....................................................................................................36
Troubleshooting.........................................................................................................37
Specifications.............................................................................................................39
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Installation
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Aswithanyairconditioningprojectundertaken,carefulinstallationisthekeytoa
successfuloutcome.Timetakenduringthisinstallationprocesswillberewardedbya
happycustomerandfewercall‐backs.
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ThestepsrequiredtoinstalltheSMT‐770thermostatare
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1. ReadandunderstandthismanualandtheUsermanual.
2. MounttheSMT‐770backplateinasuitablelocation.
3. Setthe8DIPswitchestomatchtheneedoftheproject/user.
4. Wiretheoptionalremotetemperaturesensor(s)orswitchesifrequired.
5. Poweruptheairconditioningsystem.
6. Settheinstallersoftwareoptions(ifrequired).
7. ProgramandsetuptheSMT‐770thermostat.
(TheUserManualwillassistwiththis).
8. Testtheheating,coolingandotherfunctions–Commissioning.
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Forconveniencethelayoutofthismanualisinthesameorderasthestepslistedabove.

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Mountingthewallcontroller
TheSMT‐770canonlybeasaccurateastheonboardtemperaturesensor,orits
optionalremotetemperaturesensor(s)permit.Itisthereforeessentialthatthewall
thermostatbeinstalledinalocationthatistypicaloftheambientroomtemperature.
Donotinstallthethermostatinadraft,nearafloor,behinddoorsoronanon‐insulated
externalwall.Alsoavoidplacingthethermostatinareaswheretheairmovementis
limited,affectedbydirectsunlightorotherareasnot“typical”ofthetemperatureof
theroom.
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Further,whenmountingtheSMT‐770beawarethatdrafts
maytraveldowntheinsideofcavitywalls,(especiallyif
mountedonexternalwalls)andenterthebackof
thethermostatorsensorenclosurethroughthe
cableentryholesinthewall.Itisimportanttofully
sealtheseholestopreventanydraftsaffectingthe
internallymountedtemperaturesensor.Itis
recommendedtomounttheSMT‐770orremotesensors
between1.5&1.7metresfromthefloorwherepossible.
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Movethecontrolwiresthroughthelargeopeninginthethermostatbaseplatethen
placethethermostatbaseonthewallandusingappropriatescrews,firmlyattachthe
thermostatbasetothewall.Sealanyholeswherecablesenterthebackofthe
thermostattopreventdraftsenteringthroughtheseholesaffectingthesensor.
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Settingthehardwareswitches
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SwitchOf
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On
Sw1–FanSpeeds1SpeedFan (2heat/2Cool)3SpeedFan (1heat/1Cool)
Sw2–EquipmentTypeHeatCool HeatPump(O/Bterminals)
Sw3–Stages1Stage2Stages
Sw4–ReversingValve
IfSw2=ON–HeatPump
Energiseincool(O) Energiseinheat(B)
Sw4–FanMode
IfSw2=OFF–Heat/cool
FanControlbyHeater(HG) FanControlbyT’stat(HE)
Sw5–AnticycletimerOff 4Minutes
Sw6–OperationManualThermostat ProgrammableThermostat
Sw7–MinimumRun2minutes 6Minutes
Sw8–ProgramType
IfSw6=ON–Programmable
CommercialProgram ResidentialProgram
Sw8–Setpoints
IfSw6=OFF–Manual
SingleSetpoint TwoSetpoints
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Typicaldrawingshavebeenprovidedonpage12ofthismanualthatwill
assistwiththeselectionofthecorrectpositionsforthesefunctionswitches.
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Switch1–RelayAssignment
TheSMT‐770isfittedwith5relayscapableofswitchingupto24VAC@1Amp.Switch1
setsthefunctionaseither3fanspeedswith1heatand1cooloperationorsinglefan
speedwith2heatand2cool,ineitherHP(Heatpumporreversecycle)orHC(heat
withaddoncool)mode.
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Switch2–EquipmentType.
Bothheatwithaddoncoolorheatpumptypesofsystemscanbecontrolledbythe
SMT‐770.
HeatCoolSystemusesthe“W”terminalsonlyforheatingandthe“Y”terminalsonly
forcooling.
HeatPumpsystemsusethe“Y”terminal(s)forBOTHheatingandcooling.The“W1”
terminaltocontrolthereversingvalvewhichdeterminesheatingorcoolingmode.
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Switch3–EquipmentStages.
WhenitisnecessarytocontrolasinglestagesystemA/Csystemfittedwithauxiliary
heatingelements,turnsw3OFFtherebyselectingsinglestagemode.Heatingelements
arenowcalledasstage2heat(NOTStage3Heat).
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Switch4–ReversingvalveorFanmode
WhentheSMT‐770issetforHeatPumpmode(Sw2ison)thenthisswitchsetsthe
reversingvalvelogic(O/B).WhentheSMT‐770issetforHeatCoolMode(Sw2isoff)
thenthisswitchsetsthemodefortheHeaterfanlogic(HGorHEmode).

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Switch5–AntiCycleTimer
ToprotectsomeA/Csystemsitispreferredthatundernocircumstancesshouldthe
compressorstartwithin4minutesofitswitchingoff.
Note,whenpowerisfirstappliedtotheSMT‐770it“assumes”thatthecompressorhas
juststoppedandappliesthisanticycledelaytimebeforestarting.
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Switch6–ThermostatOperation
Tosuitthevaryingrequirementsoftheuser,theSMT‐770canbesetasa
programmablethermostatusingthetimeclocktoautomaticallycontrolthebuilding
temperaturetoaprogrammedtemperatureprofile,ortotheverysimpletooperate
manualmodewheretheuserturnsthethermostatonoroff,andadjuststhe
temperaturesetpointmanually.
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Switch7–MinimumRuntime.
ToconserveenergyandprotecttheA/Csystemitisrecommendedtolimitthenumber
oftimestheheatingandorcoolingsystemcanrunin1hour.Thisswitchsetsthe
minimumheatingandcoolingequipmenttoaminimumruntimeof2or6minutes.
Oncetheheatingorcoolinghasstarteditmustrunforthisminimumsettime.TheLCD
willflashtheword“Heating”or“Cooling”wheneverthistimerisineffect.
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Switch8–ThermostatControlLogic.
Thisswitchalsohastwofunctionsbasedonthepositionofswitch6.Whenthe
SMT‐770issetasaprogrammablethermostatswitch8determineswhethera
commercialprogramorresidentialprogramisselected.Whenswitch6hasthe
SMT‐770usedasanonprogrammablethermostat,thisswitchsetssinglesetpoint
mode(imitatingasimplemechanicalthermostat)orwhetheraseparateheatingand
coolingsetpointcanbeselectedbytheuser.Twosetpointmodealsopermitstheuser
toselectaseparatedayandnightsetpointifrequired.
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TTTerminalFunctions
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TheSMT‐770isfittedwithasetofterminalsmarked“TT”.Detailonthefunctionsthat
the“TT”terminalsperformisprovidedbelow.Seetheadvancedinstallersettingmenu
onpage17ofthismanualforsettingthefunctionofthissetofterminals.Thewiring
usedinthefollowingexamplesarenotpolaritydependentanddonotnormallyrequire
screenedcable.
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Note:TheSMT‐770canusemultiplesensorsifrequired.Drawingsshowing
thesevariousconfigurationsareshownonpage31ofthismanual.
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T
T
SMT-770 RS-01
T
T
SMT-770 Switch RS-01
OutsideAirSensorwiring
Set“TT=OA”intheadvancedinstallermenu.
TheSMT‐770candisplaytheoutsideairtemperatureif
desired.Someadvancedcontrolfunctionssuchashigh
andlowbalancepointsrelyonthissensortobefitted
forcorrectoperation.Usingasinglepairofwires
connectthe“TT”terminalsintheSMT‐770tothetwoterminalsintheoutsideair
temperaturesensor.(Seefigure1).Iftheoutsideairsensorfailstwodasheswillbe
shownontheLCDwheretheoutsideairtemperaturewouldnormallybedisplayedto
alertyouoftheproblem.
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RemoteAirTemperaturesensorwiring.
Set“TT=RS”intheadvancedinstallermenu.
Whenyouwishtomeasurethetemperaturefroma
locationdistantfromthewallcontroller,simply
connectaremotetemperaturesensortothe“TT”
terminalsintheSMT‐770.Thiswillautomaticallydisablethesensorfittedtothewall
controllerandusetheremotetemperaturesensor(s)tocontroltheroomtemperature
(Seefigure1above).Shouldyouwish,youcaneasilyswitchtheremotetemperature
sensoronandofftherebyswitchingtemperaturesensinglocationsbetweentheremote
temperaturesensorandtheSMT‐770temperaturesensorwhenrequired.Simplyfitan
inlineswitchinthesensorwiringororderSmartTemppartnumberRS‐01Ssensor.(See
Figure2.)
Figure1
Figure2

11|Page

T
T
SMT-770
O
n/
O
FF Switch
AveragingTemperaturesensors
Set“TT=AV”intheadvancedinstallermenu.
TheSMT‐770canaveragethesensedtemperatureequallybetweentheremote
temperaturesensor(s)andtheonefittedtotheSMT‐770ifrequired.Seefigure1on
thepreviouspagefordetailsonwiringthesensor.TheSMT‐770willauto‐detectthis
sensorandautomaticallyaveragethetwosensorsvaluestocontroltheroom
temperature.

RemoteON/OFFfunction
Set“TT=OF”intheadvancedinstallermenu.
TheSMT‐770canbeconnectedtoanexternaldrycontact,whenthis
contactisclosedtheSMT‐770willturnOFF.Seefigure3.WhentheSMT‐770hasbeen
switchedOFFviathe“TT”terminalstheword“OFF”willflashintheLCDtoindicatethat
thishasbeentheshutdownmethod.TheSMT‐770willreturntotheusersettingswhen
thisswitchisopen.

Usingthe“OccupancyMode”
Set“TT=OC”intheadvancedinstallermenu.
TheSMT‐770canalternatebetweentheuserpreferredsetpointsandaninstallerpre
programmedsetpointwhenrequired.SimplywirearemoteswitchtotheSMT‐770
“TT”terminals,(seefigure3).Whentheswitchisopentheusersettingswillcontrolthe
roomtemperature,whentheswitchisclosedtheInstaller“Oc”(OccupiedCooling
value)&“Oh”(OccupiedHeatingvalue)settingswillbeusedtocontroltheroom
temperature.
Figure3

12|Page

TypicalDrawings

TheSMT‐770hasthecapacitytocontrolawideselectionofheating,coolingandair
conditioningsystems.UsingtheDIPswitchesandinstallersoftwareoptions,theSMT‐
770iscapableofprovidingmorethan96differentcontrolmethodsfromits5fitted
relays.Examplesofonlythemostcommontypesofcontrolwiringhavebeenprovided
below.Youmayneedtomodifythesedrawingstospecificallysuityourindividual
needsorcontactSmartTempat[email protected]m.auforinstallation
informationonyourapplication.







SwitchSettings
Sw1=Off(1speedfan)
Sw2=Off(HCSystem)
Sw3=Off(SingleStage)
Sw4=OFF(HG)
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements




Figure4

13|Page


SwitchSettings
Sw1=Off(1speedfan)
Sw2=Off(HCSystem)
Sw3=Off(SingleStage)
Sw4=OFF(HG)
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements





SwitchSettings
Sw1=Off(1speedfan)
Sw2=Off(HCSystem)
Sw3=On(TwoStage)
Sw4=OFF(HG)
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements



Figure5
Figure6

14|Page



SwitchSettings
Sw1=On(3speedfan)
Sw2=On(HPSystem)
Sw3=Off(OneStage)
Sw4=EquipmentSpecific
On=BOff=O
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements


SwitchSettings
Sw1=Off(1speedfan)
Sw2=On(HPSystem)
Sw3=On(TwoStage)
Sw4=EquipmentSpecific
On=BOff=O
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements

Note:SetW3=EH
ininstallermenu.
Figure7
Figure8

15|Page


SwitchSettings
Sw1=Off(1speedfan)
Sw2=On(HPSystem)
Sw3=Off(OneStage)
Sw4=EquipmentSpecific
On=BOff=O
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements
Note:SetW3=OFin
installermenu.



Figure10

SwitchSettings
Sw1=On(3speedfan)
Sw2=On(HPSystem)
Sw3=Off(OneStage)
Sw4=EquipmentSpecific
On=BOff=O
Sw5=Installerpreference
Sw6=Userrequirements
Sw7=Installerpreference
Sw8=Userrequirements

Figure9

16|Page

Attachingthethermostat

Checkthatthepositionofthe8DIPswitchesmatchestherequirementsofthe
equipmentbeingcontrolledandthespecificrequirementsoftheuser.Detailed
informationonthe8DIPswitchescanbefoundonpage6ofthismanual.

CheckthewiringmatchesthatoftheequipmenttheSMT‐770istocontrolandthatall
wiringistightandnotlikelytoshortbetweenadjacentwires.Equipmentwiring
informationcanbefoundonpage12ofthismanual.

IfusingtheModbuscommunicationcapabilityoftheSMT‐770,
ensurethe“A”,“B”&“C”datawiresareinthecorrectpositionas
anerrorheremayaffectthecommunicationoftheentire
network.Seepage32fordetailedwiringofthecommunications
portoftheSMT‐770.

Usingmaskingtapeorsimilar,blocktheholeinthewall
wherethewiringentersthebackofthethermostatto
preventdraftsthatmaytraveldowntheinsideofthewall
cavityfromaffectingtheaccuracyoftheinternallyfittedtemperature
sensor.

Figure11

17|Page

Removeanddiscardtheplastictabontheinternallyfittedbackupbatterysothatthe
batteryisnowincircuitandoperating.

AvoidtwistingthecaseasthismaystresstheLCDandcauseittocrack.Avoidrunning
wiringneartheinternallyfittedsensor.

Takecarenottodamageorcrushthetemperaturesensorbetweenthetwohalf’sof
thecasewhenyouclosetheChameleoncase.Checkthissensorlocation.
AdvancedInstallerSettings

TheSMT‐770isfittedwithmanyadvancedfunctionsthatcanbefinetunedbythe
installertospecificallymatchtheneedsoftheprojectoftheuser.

Normallythesefunctionswillnotneedtobealteredfromthefactorydefaultposition
however,theremaybetimeswhenyouwishtoalterasettingorcontrolcapabilityso
thattheSMT‐770sperformancewillperfectlymatchaparticularapplication.Onthe
nextfewpagesthereisdetailedexplanationofthesefunctionsandtheirrangeof
control.

Whileintheadvancedinstallermenu,allSMT‐770equipmentcontrolfunctionswillbe
suspended.Normalequipmentoperationwillcontinuewhenyouhaveexitedthismenu
(afteranyanticycledelaysorsafetydelayshaveterminated).

18|Page

UsingtheInstallerMenu

TomoveforwardthroughtheInstallermenuitemstapthe“O/RIDE”button.

TomovebackwardsthroughtheInstallermenuitemstapthe“PROG”button.

ToadjustavalueintheInstallermenutapthe(S)ordown(T)buttons.

Toexittheinstallermenutapthe“Mode”button,the“Fan”buttonorwait60seconds.

EnteringtheInstallerMenu

ToentertheInstallermenu,pressandholdtheO/RIDEbuttonfor15seconds.After15
secondstheLCDwillshow“88:15”–ThefactorydefaultPIN.

Adjustthisvalueto“88:21”(oryourpreviouslyselectedvalue)byusingtheup(S)or
down(T)button.TaptheO/RIDEbuttontoenterthemenu.

IfyouhaveenteredthecorrectPINyouwillbegiventhefirstmenuoption,ifyouhave
enteredaincorrectPINyouwillbeexitedfromthismenu.

DefaultInstallerValuesareshownintheexamplesbelow.

19|Page


PN=21KeyboardLockPIN
ThisistherequiredPINforfutureentryintotheInstallermenu.
Range00to99in01steps.
(Caution,ifyouchangethisvalueandforgetyournewPIN,youmayneedto
returntheSMT‐770toplaceofpurchaseforunlocking‐theremaybeafeefor
thisservice)
LC=0 KeyboardLocklevel
ProgrammableMode(SW6=ON)
LC=00‐KeyboardLockOFF.
LC=01‐Allbuttonsarelocked.
LC=02‐AllbuttonsarelockedexcepttheO/Ridebutton.
LC=03‐AllbuttonsarelockedexcepttheModeandO/Ridebuttons.
LC=04‐AllbuttonsarelockedexcepttheModebutton.

ManualMode(SW6=Off)
LC=00‐KeyboardLockOFF.
LC=01‐AllbuttonsarelockedexcepttheModebutton.
LC=02‐AllbuttonsarelockedexcepttheModeandtemperature+/‐button.
LC=03‐Fan&O/ridebuttonsarelocked.
ModebuttoncanonlyselectAuto(Heat&Cool)andoff.
LC=04‐O/RideButtonislocked
ModebuttoncanonlyselectAuto(Heat&Cool)andoff.
(Note(S)ordown(T)buttonscanbelimitedintheHL&CLmenuitems)

20|Page

HL=35(95F)HeatingLimit(orHighLimit)
ThehighestHeatingvaluepermittedtobesetbytheuser.
Adjustablebetween0~35c(32~95F).
CL=5(41F)CoolingLimit(orLowLimit)
ThelowestCoolingvaluepermittedtobesetbytheuser.
Adjustablebetween5~37c.(41~98F).
CF=C TemperaturedisplayFormat
DegCordegFdisplaytype.(effectsalluserandinstallermenuitems)
C1=0.0 FittedSensorCalibration
CalibrationOffsetfortheinternalsensor.
Adjustablerange+/‐5degC(+/‐9F).
tC=12 TimeClock
Display12or24hourClockStyle.
tD=0 TemperatureDisplay
TD=00‐TheSMT‐770willdisplayboththeRoom&SetTemperature.
TD=01‐TheSMT‐770willdisplaysettemperatureonly.
AH=2 AfterHoursOverrideTimer
Start/StopMode‐CommercialThermostatMode(Sw6=on,Sw8=off)
Afterhourruntimeperiod‐Adjustablerange0(off)to12hours.
Setback(1,2,3,4)mode–ResidentialprogrammableMode(Sw6=on,Sw8=on)
Temporarilyprogramoverrideperiod.
Off=Overridetillnextprogramchangeor1‐12hours(fixedtimeoverride)