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

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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SMT-770 RS-01

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

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