© 2019 tekmar 671_D - 08/19

671_D08/19

Snow Melting Replaces: New

WiFi Snow Melting Control 671Installation & Operation Manual

Features• Automaticsoftwareupdates• Automaticsnow/icedetection• Supportsbothinslab&retrofitaerialsensors• Supportsmultiplezoneswithpriority• ManualStorm• Idling

• WarmWeatherShutDown• ColdWeatherCutOff• EconoMelt• TandemSnow/IceDetection• Pumpexercising• Mobileappisscheduledtobeavailableinearly2020

IntroductionTheWiFiSnowMeltingControl671operateshydronicandelectricheatingequipmentdesignedtomeltsnowand/oricefromroadsandwalkwayssurfaces.ThecontrolworkswithtekmarSnow/IceSensor090orSnowSensor095toautomaticallydetectsnoworiceandoperatesasingleboiler,steamvalveorelectriccabletosupplyheattotheslab.

WiFi Snow Melting Control 671Pulse Width Modulation

PowerRelays

1084-02Designed and assembled in Canada

Date

Cod

eH

2058

A

Blu3

Yel4

Brn/5

SlabMan

6

MeltC7

Blk/2

ComRed1

Boiler HeatRelay

SystemPump

11 12 13Do Not Apply Power

Out10

Com9

tN48 161514

Power17

L

18

N

For product literature:Pour la documentation du produit:Para la literatura del producto:tekmarControls.com

Disconnect all power before opening.WARNING

Coupez l'alimentation avant l'ouverture.ATTENTION

Desconecte la electricidad antes de abrir.ADVERTENCIA

Signal wiring must be rated at least 300 V.Le câblage du signal doit être d'une capacité d'au moins 300 V.Cableado de señal debe tener unacalificación mínima de 300 V.

Contains WiFi transceiver:FCC ID: Z64-CC3100M0DR1Meets FCC Part 15BIC: 4511-CC3100M0DR1Meets CAN ICES-3 (B)/NMB-3(B)

115 V (ac) ±10%, 60 Hz, 20 VA230 V (ac) 5 A 1/3 hp

This is a hole

Manual Melt

Time Left- - : - - hrs

Outdoor32 °F

Settings Status

System is Melting

Stop

10:30 AM

Warming Up

2of36© 2019 tekmar 671_D - 08/19

Table of Contents

Getting Started

ImportantSafetyInformation.............................................3Installation.........................................................................4

Preparation.................................................................... 4PackagingContents...................................................... 4PhysicalDimensions..................................................... 4InstallationLocation....................................................... 4InstallingtheEnclosure................................................. 5Rough-InWiring............................................................. 6SensorWiring................................................................ 7tekmarNet...................................................................... 9ManualMeltInput.......................................................... 9TestingtheSensorWiring............................................ 11TestingtheControlWiring............................................ 11ManualOverride–MaximumHeat.............................. 12ManualOverride–Purge............................................. 12ManualOverride–Test................................................ 12ManualOverride–Off.................................................. 12AccessLevels............................................................... 12

UserInterface...................................................................13HomeScreen................................................................ 13SystemOperation......................................................... 13Symbols........................................................................ 14HelpScreen.................................................................. 14StatusMenuNavigation............................................... 14SystemStatusMenu.................................................... 15SlabStatusScreen....................................................... 15WeatherStatusScreen................................................ 16SettingsMenuNavigation............................................ 16TempMenu................................................................... 18AwayMenu................................................................... 19DisplayMenu................................................................ 19WiFiMenu..................................................................... 20TimeMenu.................................................................... 20EnergyMenu................................................................ 21MonitorMenu................................................................ 21Setup–SystemSetupMenu........................................ 22Setup–BoilerSetupMenu.......................................... 22tekmarNetMenu........................................................... 23ToolboxMenu............................................................... 24OverrideMenu.............................................................. 24

SequenceofOperation....................................................25SnowMeltingOverview................................................ 25

Melt–AutomaticStartandStop.................................. 25Melt–EconoMelt.......................................................... 26AdditionalMeltingTime................................................ 26Melt–AutomaticStartandTimedStop....................... 26TandemSnow/IceDetection........................................ 27Melt–ManualStartandTimedStop........................... 27Melt-TrackedStartandStop...................................... 27IdleOperation............................................................... 28StormOperation........................................................... 28SlabTemperatureControl............................................ 29SnowMeltZonesandPriority...................................... 29WarmWeatherShutDown........................................... 31ColdWeatherCutOff................................................... 31TimeClock.................................................................... 31AwayOperation............................................................ 31tekmarNetSceneOperation......................................... 31PulseWidthModulationZoneOperation..................... 32BoilerOperation............................................................ 32OutdoorSensor............................................................ 33Exercising..................................................................... 33PostPurge.................................................................... 33

Troubleshooting............................................................... 33ErrorMessages(1of2)................................................ 33ErrorMessages(2of2)................................................ 34FrequentlyAskedQuestions........................................ 35

TechnicalData................................................................. 36LimitedWarrantyandProductReturnProcedure........... 36

CongratulationsonthepurchaseofyournewSnowMeltingControl!Thismanualcoversthecompleteinstallation,programmingandsequenceofoperationforthiscontrol.Youwillalsofindinstructionontesting,commissioning,andtroubleshootingthecontrolandsystemthatitoperates.

© 2019 tekmar 671_D - 08/193of36

Theinstallermustensurethatthiscontrolanditswiringareisolatedand/orshieldedfromstrongsourcesofelectromagneticnoise.Conversely,thisClassBdigitalapparatuscomplieswithPart15oftheFCCRulesandmeetsallrequirementsoftheCanadianInterference-CausingEquipmentRegulations.However,ifthiscontroldoescauseharmfulinterferencetoradioortelevisionreception,whichisdeterminedbyturningthecontroloffandon,theuserisencouragedtotrytocorrect

theinterferencebyre-orientatingorrelocatingthereceivingantenna,relocatingthereceiverwithrespecttothiscontrol,and/orconnectingthecontroltoadifferentcircuitfromthattowhichthereceiverisconnected.CetappareilnumériquedelaclasseBrespectetouteslesexi-gencesduRèglementsurlematérielbrouilleurduCanada.

Radio Frequency Interference

Important Safety InformationItisyourresponsibilitytoensurethatthiscontrolissafelyinstalledaccordingtoallapplicablecodesandstandards.tekmarisnotresponsiblefordamagesresultingfromimproperinstallationand/ormaintenance.

Thisisasafety-alertsymbol.Thesafetyalertsymbolisshownaloneorusedwithasignalword(DANGER,WARNING,orCAUTION),apictorialand/orasafetymessagetoidentifyhazards.Whenyouseethissymbolaloneorwithasignalwordonyourequipmentorinthismanual,bealerttothepotentialfordeathorseriouspersonalinjury.

Thispictorialalertsyoutoelectricity,electrocution,andshockhazards.

Thissymbolidentifieshazardswhich,ifnotavoided,couldresultindeathorseriousinjury.

Thissymbolidentifieshazardswhich,ifnotavoided,couldresultinminorormoderateinjury.

Thissymbolidentifiespractices,actions,orfailuretoactwhichcouldresultinpropertydamageordamagetotheequipment.

ReadmanualandallproductlabelsBEFOREusingtheequipment.Donotuseunlessyouknowthesafeandproperoperationofthisequipment.Keepthismanualavailableforeasyaccessbyallusers.ReplacementmanualsareavailableattekmarControls.com

• Itistheinstaller’sresponsibilitytoensurethatthiscontrolissafelyinstalledaccordingtoallapplicablecodesandstandards.

• Improperinstallationandoperationofthiscontrolcouldresultindamagetotheequipmentandpossiblyevenpersonalinjuryordeath.

• Thiscontrolisnotintendedforuseasaprimarylimitcontrol.Othercontrolsthatareintendedandcertifiedassafetylimitsmustbeplacedintothecontrolcircuit.

Donotattempttoservicethecontrol.Therearenouserserviceablepartsinsidethecontrol.Attemptingtoservicethecontrolvoidsthewarranty.

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Preparation

Tools Required-----------------------------------------------------------------------------------------• tekmarorjewelerscrewdriver• Phillipsheadscrewdriver

• Needle-nosepliers• Wirestripper

Materials Required-------------------------------------------------------------------------------------• 18AWGLVTsolidwire(low-voltageconnections)• 14AWGsolidwire(line-voltageconnections)

• Four1/8"-1"woodscrews

Installation Location

Installation

Physical Dimensions

Choosetheplacementofthecontrolearlyintheconstructionprocesstoenableproperwiringduringrough-in.

• Keepthecontroldry.Avoidpotentialleakageontothecontrol.• Maintainrelativehumiditylessthan90%inanon-condensingenvironment.• Avoidexposuretoextremetemperaturesbeyond32-122°F(0-50°C).• Installawayfromequipment,appliances,orothersourcesofelectricalinterference.• Installtoalloweasyaccessforwiring,viewing,andadjustingthedisplayscreen.• Installapproximately5feet(1.5m)offthefinishedfloor.• Locatethecontrolnearpumpsand/orzonevalvesifpossible.• Provideasolidbackingwhichtheenclosurecanbemountedto.Example:plywoodorwallstuds.• Usetheconduitknockoutsprovidedontheupper,lower,backandsidesoftheenclosureforwiring.

Packaging Contents

Thefollowingareincludedintheproductpackaging:• 1WiFiSnowMeltingControl671• 1OutdoorSensor070• 1screwdriver• 1ApplicationBrochure671_A

• 1InstallationandOperationManual671_D• 1UserManual671_U

Front View Side View

2–7/8"(72 mm)

1/2" Knock-out (x 5 back) (x 5 bottom)

Mounting Base

CL

1/2"(13 mm)

7/8"(23 mm)

6–5/8"(170 mm)

7–5/8"(193 mm)

1–7/8" (49 mm)

1/2"(14 mm)

3/16" (5 mm)

WiFi Snow Melting Control 671Pulse Width Modulation

PowerRelays

1084-02Designed and assembled in Canada

Date

Cod

eH

2058

A

Blu3

Yel4

Brn/5

SlabMan

6

MeltC7

Blk/2

ComRed1

Boiler HeatRelay

SystemPump

11 12 13Do Not Apply Power

Out10

Com9

tN48 161514

Power17

L

18

N

For product literature:Pour la documentation du produit:Para la literatura del producto:tekmarControls.com

Disconnect all power before opening.WARNING

Coupez l'alimentation avant l'ouverture.ATTENTION

Desconecte la electricidad antes de abrir.ADVERTENCIA

Signal wiring must be rated at least 300 V.Le câblage du signal doit être d'une capacité d'au moins 300 V.Cableado de señal debe tener unacalificación mínima de 300 V.

Contains WiFi transceiver:FCC ID: Z64-CC3100M0DR1Meets FCC Part 15BIC: 4511-CC3100M0DR1Meets CAN ICES-3 (B)/NMB-3(B)

115 V (ac) ±10%, 60 Hz, 20 VA230 V (ac) 5 A 1/3 hp

This is a hole

Manual Melt

Time Left- - : - - hrs

Outdoor32 °F

Settings Status

System is Melting

Stop

10:30 AM

Warming Up

© 2019 tekmar 671_D - 08/195of36

Installing the Enclosure

• Installthecontrolenclosuretoawallortoanelectricalbox.• Threewiringchamberdividersareincluded.Thedividersprovideabarriertokeeplowvoltagewiringseparatedfromline

voltagewiring.• Ifthedividersarenotused,thenlowvoltagecircuitsmustusewireratedatleast300V.

Press down at the fingertipgripsontopofthefrontcoverandpulloutanddown.

Lift thefrontcoverupandawayfromthecontrol.

Loosen the screws at thefrontofthewiringcover.

Thewiringcoverpullsstraightoutfromthewiringchamber.

Thebaseisreadyformounting.Thecontrolliftsupandawayfromthebase.

Pressthecontrolreleasecliponthebaseinsidethewiringchamberandslidethecontrolupwards.

Remove the safety dividersfrom the wiring chamber bypulling them straight out oftheirgrooves.

Thereare10conduitknock-outsatthebackandbottomofthewiringchamber.

13Mountingholes

Controlrelease

clip

Controlreleaseclip

Thecontrol canbemountedonastandardDINrail.Firstremovethecontrolfromitsbaseandthen,using the hooks and spring cliponthebackofthecontrol,mountitontotheDINrail.Thiswillbeapopularoptionforthosewhoprefertomountthecontrolinsidealargerelectricalpanel.TheDINSnapKitM9303issoldseparately.

The wiring can enter thebottomorthebackoftheenclosure.Knock-outspro-videdinthebaseallowthewiringtoberuninconduitup to the enclosure. Thebase also has holes thatlineupwith themountingholes of most commonelectricalboxes.

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Rough-In Wiring

Low-Voltage Wiring-------------------------------------------------------------------------------------Pull two conductor 18 AWG LVT cable, up to 500 feet (150 m) long, for the following equipment:• Outdoortemperaturesensor• Boilersensor• Single-stageon/offboiler

Pull four conductor 18 AWG LVT cable, up to 500 feet (150 m) long, for the following equipment:• SnowSensor095Pull the Snow/Ice Sensor 090 or 094 cable to the control.

Line-Voltage Wiring------------------------------------------------------------------------------------Pull two conductor 14 AWG cable, up to 500 feet (150 m) long, for the following equipment:• Systempump• Boilerpump

Topreventtheriskofpersonalinjuryand/ordeath,makesurepowerisnotappliedtothecontroluntilitisfullyinstalledandreadyforfinaltesting.Allworkmustbedonewithpowertothecircuitbeingworkedonturnedoff.Pleasebeawarelocalcodesmayrequirethiscontroltobeinstalledorconnectedbyanelectrician.

• Installthesuppliedwiringcompartmentbarriersbyslidingthemintothegroovesprovidedtoisolatethelowandline-voltagewiring.

• Stripallwiringtoalengthof3/8in.or10mmforallterminals.• Acircuitbreakerorpowerdisconnectthatprovidespowertothecontrolshouldbelocatednearbyandclearlylabeled.• Refertothecurrentandvoltageratingsatthebackofthismanualbeforeconnectingdevicestothiscontrol.

© 2019 tekmar 671_D - 08/197of36

• Thetemperaturesensor(thermistor)isbuiltintothesensorenclosure.

• Theoutdoorsensorcaneitherbemounteddirectlyontoawallandthewiringshouldenterthroughthebackorbottomoftheenclosure.Donotmounttheoutdoorsensorwiththeconduitknockoutfacingupwardsbecauseraincouldentertheenclosureanddamagethesensor.

• Inordertopreventheattransmittedthroughthewallfromaffectingthesensorreading,itmaybenecessarytoinstallaninsulatingbarrierbehindtheenclosure.

• Theoutdoorsensorshouldbemountedonanorth-facingwall.Theoutdoorsensorshouldnotbeexposedtoheatsourcessuchasventilationorwindowopenings.

• Theoutdoorsensorshouldbeinstalledatanelevationabovethegroundthatwillpreventaccidentaldamageortampering.

Mounting the Outdoor Sensor--------------------------------------------------------------------------

• Connect18AWGorsimilarwiretothetwoterminalsprovidedintheenclosureandrunthewiresfromtheoutdoorsensortothecontrol.Donotrunthewiresparalleltotelephoneorpowercables.Ifthesensorwiresarelocatedinanareawithstrongsourcesofelectromagneticinterference(EMI),shieldedcableortwistedpairshouldbeusedorthewirescanberuninagroundedmetalconduit.Ifusingshieldedcable,theshieldwireshouldbeconnectedtotheComter-minalonthecontrolandnottoearthground.

• Followthesensortestinginstructionsinthismanualandconnectthewirestothecontrol.

• Replacethefrontcoverofthesensorenclosure.

Wiring the Outdoor Sensor-----------------------------------------------------------------------------

Removecoverby

slidingup-wardsaway

fromthebase.

Towirefromtheback,

removetheknock-outinthesensor

base.

S1S1

Ifusingconduit,

removetheflexibleplug

fromthebasebottom.

S1S1 Attachthe

basetothewall,soffit

orelectricalbox.

S1S1

Wires from outdoorsensor to control’soutdoor sensor andsensor commonterminals

Sensor is built intothe enclosure

Wiresfromoutdoorsensor

andsensorcommon

terminalsontekmarcontrolS1

S1

Sensor Wiring

Atthecontrol:• Connecttheoutdoorsensortoterminals9and10.

Com9

Out10

Com9

Out10

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Snow/Ice Sensor---------------------------------------------------------------------------------------

Snow Sensor-------------------------------------------------------------------------------------------

Slab Sensor--------------------------------------------------------------------------------------------

ASnow/IceSensor090or094canbeconnectedtothecontrol.The090hasa65'(20m)cableandthe094hasa208'(63m)cable.Thecablemaybeextendedtoatotallengthof500'(150m)using18AWGcable.Anyjunctionboxesmustkeptdry.

IftheSnow/IceSensorinputisused:• Connecttheredwiretoterminal1.• Connecttheblackwiretoterminal2.• Connectthebluewiretoterminal3.• Connecttheyellowwiretoterminal4.• Connectthebrownwiretoterminal5.

ASnowSensor095canbeconnectedtothecontrol.

IftheSnowSensorinputisused:• Connecttheredwiretoterminal1.• Connecttheblackwiretoterminal2.• Connectthebluewiretoterminal3.• Connecttheyellowwiretoterminal4.

ASlabSensor072or073canbeinstalledeitheraloneortogetherwithaSnowSensor095.

IftheSlabSensorinputisused:Connecttheslabsensortoterminals2and5.

Blu3

Yel4

Brn/ 5

SlabBlk/2

ComRed1

SnowSensor

095

Blu3

Yel4

Brn/ 5

SlabBlk/2

ComRed1

Blu3

Yel4

Brn/ 5

SlabBlk/2

ComRed1

© 2019 tekmar 671_D - 08/199of36

tekmarNet

The671canbeconnectedtoothertekmarNetcommunicationcompatiblecontrolsusingthetN4bus.

IftekmarNetisused:• ConnecttN4onthe671terminal6tothetN4wiringterminalontheotherdevice.• ConnectConthe671terminal7totheCwiringterminalontheotherdevice.• tekmarNetispolaritysensitive.

other tN4 control

671

6C

7tN4 CtN4

Manual Melt Input

Themanualmeltinputallowsthecontroltobemanuallyswitchedtomeltingoperationusingaswitch.Thisconnectionisoptional.

IftheManualMeltinputisused:Connectaswitchtoterminals8and9.Theswitchmaybeeitherdry(novoltage)oravoltagesignalupto32V(ac).

ManMelt

Com 9 8

10of36© 2019 tekmar 671_D - 08/19

Wiring to a Single-Stage Boiler-------------------------------------------------------------------------

Asingle-stageboilerisenabledthroughtheT-Tcontacts.• ConnectBoilerterminals11and12totheboilerT-Tcontacts.

Stage1T T

Boiler 11 12

WR

Providea15Acircuitfortheinputpower.• Connectthe115V(ac)linewire(L)toterminal17.• Connecttheneutralwire(N)toterminal18.

N

L

Power17

L

18

N

Wiring the Input Power---------------------------------------------------------------------------------

Iftheheatrelayisoperatingapump:Thepumpcanberatedupto230V(ac),5A,1/3hpandswitchedthroughterminals13and14.Forsimplicityinwiringandtroubleshooting,aseparatebreakerforeachpumpisrecommended.• Connectthepowersourcelinewire(L)toterminal14.• Connectawirefromterminal13tothepumpL.• ConnectawirefromthepumpNbacktothepowersourceneutral.• Connectthegroundwire(G)tothepump.

Iftheheatrelayiswiredtoanelectricalcontactor:• Connectawirefromterminal13totheelectricalcontactorR.• Connectawirefromterminal14totheelectricalcontactorC.

Wiring the Heat Relay----------------------------------------------------------------------------------

Asystempumprequiringupto230V(ac),5A,1/3hpcanbeswitchedthroughterminals15and16.Forsimplicityinwiringandtroubleshooting,aseparatebreakerforeachpumpisrecommended.• Connectthepowersourcelinewire(L)toterminal16.• Connectawirefromterminal15tothepumpL.• ConnectawirefromthepumpNbacktothepowersourceneutral.• Connectthegroundwire(G)tothepump.

Wiring the System Pump-------------------------------------------------------------------------------

LNG

LNG

HeatRelay

13 14

HeatRelay

13 14

LNG

LNG

SystemPump

1615

Equipment Wiring

RC

RC

HeatRelay

13 14

Iftheheatrelayiswiredtoa24V(ac)on-offvalve:• Connectthepowersourceredwire(R)toterminal13.• Connectawirefromterminal14tothevalveR.• ConnectawirefromthevalveCtothepowersourcecommon.

© 2019 tekmar 671_D - 08/1911of36

Agoodqualitytestmetercapableofmeasuringupto5,000kΩ(1kΩ=1000Ω)isrequiredtomeasurethesensorresistance.Inaddition,theactualtemperaturemustbemeasuredwitheitherahigh-qualitydigitalthermometer,orifathermometerisnotavailable,asecondsensorcanbeplacedalongsidetheonetobetestedandthereadingscompared.First,measurethetemperatureusingthethermometerandthenmeasuretheresistanceofthesensoratthecontrol.Thewiresfromthesensormustnotbeconnectedtothecontrolwhilethetestisperformed.Usingthechartbelow,estimate

thetemperaturemeasuredbythesensor.Thesensorandthermometerreadingsshouldbeclose.Ifthetestmeterreadsaveryhighresistance,theremaybeabrokenwire,apoorwiringconnectionoradefectivesensor.Iftheresistanceisverylow,thewiringmaybeshorted,theremaybemoistureinthesensororthesensormaybedefective.Totestforadefectivesensor,measuretheresistancedirectlyatthesensorlocation.Do not apply voltage to a sensor at any time as damage to the sensor may result.

Testing the Sensor Wiring

Temperature Resistance Temperature Resistance Temperature Resistance Temperature Resistance°F °C °F °C °F °C °F °C-50 -46 490,813 20 -7 46,218 90 32 7,334 160 71 1,689-45 -43 405,710 25 -4 39,913 95 35 6,532 165 74 1,538-40 -40 336,606 30 -1 34,558 100 38 5,828 170 77 1,403-35 -37 280,279 35 2 29,996 105 41 5,210 175 79 1,281-30 -34 234,196 40 4 26,099 110 43 4,665 180 82 1,172-25 -32 196,358 45 7 22,763 115 46 4,184 185 85 1,073-20 -29 165,180 50 10 19,900 120 49 3,760 190 88 983-15 -26 139,403 55 13 17,436 125 52 3,383 195 91 903-10 -23 118,018 60 16 15,311 130 54 3,050 200 93 829-5 -21 100,221 65 18 13,474 135 57 2,754 205 96 7630 -18 85,362 70 21 11,883 140 60 2,490 210 99 7035 -15 72,918 75 24 10,501 145 63 2,255 215 102 64810 -12 62,465 80 27 9,299 150 66 2,045 220 104 59815 -9 53,658 85 29 8,250 155 68 1,857 225 107 553

Testing the Control WiringRemovethefrontcoverfromthecontrol.Testing the Power-------------------------------• Useanelectricalmetersettomeasure(ac)voltage.• MeasurebetweentheLandNterminals.• Thereadingshouldbe115V(ac)+/–10%.Hand Manual Override---------------------------ThecontrolincludesaHandManualOverridemenutocheckifthecontrol’srelaysareoperatingandthatthecontroliswiredcorrectlytothesnowmeltingequipment.Step1: PressSettingsbutton.Step2: PressOverridebutton.Step3: PressManualOverride.Step4: SelectManualOverridetoHand.Step5: PressBackbutton.Step6: Thefollowingoutputscanbeoperated:• SystemPumprelay• HeatRelay• BoilerRelayFor each relay output• Useanelectricalmetersettomeasure(ac)voltage.• Measurebetweentherelaywiringterminals.• Whentherelayisoff,thevoltageshouldbe115V(ac).• Whentherelayison,thevoltageshouldbe0V(ac).Exiting the Hand Manual Override---------------• ExittheManualOverridebyselectingAuto.• Installthefrontcover.

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Manual Override – Maximum HeatInhydronicapplicationmodes,thecontrolincludesaMaximumHeatoperationwherethecontroloperatesthesnowmeltingsystemtomaintainthemaximumallowedheatingsetpoints.Thisallowstestingofthesnowmeltingsystemduringwarmweather.

Step1: PressSettingsbutton.Step2: PressOverridebutton.Step3: PressManualOverride.Step4: SelectManualOverridetoMaxHeat.Step5: PressBackbutton.ThecontrolstartstheMaxHeat

operation.Step6: ExittheManualOverridebyselectingAuto.

Whenoperatingahydronicsnowmeltingsystem,itisnecessarytopurgeandbleedallairoutofthesystem.ThecontrolincludesaPurgeoperationwherethesystem,primaryandboilerpumpsareallturnedontoassistinpurgingairfromthesystem.

Step1: PressSettingsbutton.Step2: PressOverridebutton.Step3: PressManualOverride.Step4: SelectManualOverridetoPurge.Step5: PressBackbutton.ThecontrolstartsthePurge

operation.Step6: ExittheManualOverridebyselectingAuto.

Manual Override – Purge

ThesnowmeltingsystemcanbemanuallyturnedoffandthecontrolremainsoffuntilmanuallychangedbacktoAuto.Thisallowstheinstallerorendusertopermanentlydisablethesnowmeltingsystemwithoutremovingpowerfromthecontrol.

Step1: PressSettingsbutton.Step2: PressOverridebutton.Step3: PressManualOverride.Step4: SelectManualOverridetoOff.Step5: PressBackbutton.Thecontrolisnowintheoffmanual

override.Step6: ExittheManualOverridebyselectingAuto.

Manual Override – Off

Access LevelsThecontrolisshippedpre-programmedwithcommonsettings.Thecontrolhasan“Installer”accesslevelthatallowsfullaccesstoallsettingsanda“User”accesslevelthatrestrictsthenumberofsettingsavailable.Thecontroldefaultstothe“User”accesslevelafter12hoursofoperation.

Tochangetothe“Installer”accesslevel:• Step1:PresstheSettingsbutton.• Step2:PresstheToolboxbutton.• Step3:PressAccessLevel.• Step4:PresstheInstallerradiobutton.

© 2019 tekmar 671_D - 08/1913of36

Home Screen

User Interface

System Operation

Viewstatusofsensorreadingsandequipment

Remainingmeltingruntime

Systemoperationinformation

Gotosettingsmenutosetupcontrol

Informationaboutslabandoutdoorconditions

SYSTEM IS MELTING• Thecontrolhaseitherdetectedsnow/iceandautomaticallystartedorthecontrolwasmanually

started.• "WarmingUp"isshownwhentheslabisbelowtheslabtargettemperature.

SYSTEM IS OFF• Thesnowmeltingsystemisoffandisreadytodetectsnoworice.• "WarmWeatherShutDown"isshownwhentheslabandoutdoortemperatureareabovethe

WWSDsetting.DuringWWSD,thesnowwillmeltnaturallyduetowarmoutdoortemperatures.• "ColdWeatherCutOff"isshownwhentheoutdoortemperatureisbelowtheCWCOsetpoint.The

outdoortemperatureissocoldtheheatingsystemdoesnothavecapacitytomeltsnow.• "MeltPending"isshownwhenthesystemisoffduringCWCObutwillresumemeltingoncethe

outdoortemperatureincreasesabovetheCWCOsetpoint.

SYSTEM IS IDLING• Thecontrolispre-heatingtheslabtotheidlingsetpoint.Thisreducestheamountoftimeneeded

toreachthemeltingsetpointintheeventsnoworiceisdetected.

SYSTEM IN OVERRIDE / SYSTEM IN EXERCISING• Thecontrolisinamanualoverridefortesting,commissioningorexercising.• Thedescriptionfieldexplainswhichtypeofoverrideisactive.

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Symbols

!WARNING SYMBOLThecontrolhasaerrormessage.Pressthewarningsymboltodeterminetheerrorcodeandinformationonhowtotakecorrectiveaction.RefertotheTroubleshootingsectionforalistoferrorcodes.

Help Screen

ThedisplayincludesaHelpscreenforeachsetting.TheHelpscreenprovidesadescriptionofthesettingthatisidenticaltothedescriptionfoundintheInstallationandOperationManual.

Status Menu NavigationStep1:PresstheStatusbuttonontheHomeScreen.Step2:PresseithertheSystem,SlaborWeatherbutton.Step3:Pressupordownbuttonstoscrollthroughthelist.

© 2019 tekmar 671_D - 08/1915of36

System Status MenuDescription Range Access

MANUAL MELT INPUTWhenManualMeltwiringterminal8isshortedtocommonwiringterminal9,thecontrolisenabledandentersthemeltingoperationunlesspreventedbywarmweathershutdownorcoldweathercutoff.Whenthemanualmeltinputisdisconnected,thecontrolcompletesthemeltingcycleandthenreturnstooff,idleorstormoperation.Conditions:Available

Off,Enabled UserInstaller

TEKMARNETWhentekmarNetcommunicationispresent,thestatusshowsactive.WhenthereisnotekmarNetcommunication,thestatusisoff.Conditions:Available

Off,Active UserInstaller

BOILERCurrentstatusoftheBoilerrelay.Conditions:Alwaysavailable

OnorOff UserInstaller

SYSTEM PUMPCurrentstatusofthesystemlooppump.Conditions:Alwaysavailable

OnorOff UserInstaller

HEAT RELAYCurrentstatusoftheheatrelay.Conditions:Alwaysavailable

OnorOff UserInstaller

Slab Status ScreenDescription Range Access

OUTDOORCurrentoutdoorairtemperatureasmeasuredbytheoutdoorsensororfromthetekmarNetsystem.“–––”isdisplayedwhennooutdoortemperaturereadingisavailable.

–––,-67to149°F

(-55.0to65.0°C)

UserInstaller

SLAB TARGETTheslabtargetcalculatedbythecontrolbasedonoutdoortemperatureandthemelting,idling,orstormsetpoints.“---”isdisplayedwhennoheatisrequired.

–––,32to110°F

(0to43.0°C)

UserInstaller

SLAB SENSORCurrentslabsensortemperature. -58to167°F

(-50.0to75.0°C)User

Installer

SENSOR WATER STATUSCurrentstatusofsnow/icesensormoisturedetector. DRYorWET User

Installer

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Weather Status Screen

Currentoutdoorconditions

WhenWiFiisturnedon,thecontrolreceivesweatherdatafromtheInternet.Thecurrentweather,outdoortemperatureandforecastsnowfallinformationisdisplayed.

Settings Menu Navigation

Step1:PresstheSettingsbuttonontheHomeScreen.Step2:Pressoneofthetenbuttons.Step3:Pressupordownbuttonstoscrollthroughthelist.Step4:Pressthehighlightedsettingnametochangethesettingvalue.

© 2019 tekmar 671_D - 08/1917of36

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Description Range Access

MELTING SETPOINTSelectthedesiredtemperatureofthesnowmeltsurfacewhenmelting.

32to95°F(0.0to35.0°C)Default=36°F

(2.0°C)

UserInstaller

IDLING SETPOINTSelectthedesiredtemperatureofthesnowmeltsurfacewhenidling.Idlingpreheatstheslabwhentheslabisdrybutcoldandallowsfasterreactiontimetoreachthemeltingtemperaturewhensnowisdetected.Recommendedforcommercialuseonly.

OFF,20to95°F(-6.5to35.0°C)

Default=Off

UserInstaller

STORM SETPOINTSelectthedesiredtemperatureofthesnowmeltsurfacewhileoperatinginthestormoperation.Stormoperationtemporarilypreheatstheslabtoallowfasterreactiontimetoreachthemeltingtemperaturewhensnowisdetected.

OFF,20to95°F(-6.5to35.0°C)

Default=Off

UserInstaller

MANUAL MELT TIMESelecttheamountofrunningtimewhenmanuallystartingthesystem.

0:30to24:00hours

Default=4:00hours

UserInstaller

ADD MELT TIMESelecttheamountofadditionalmeltingtimeaftertheSnow/IceSensorisdry.Thisallowslowspotsontheslabtofullydrybeforethesnowmeltingsystemisshutoff.

0:00to6:00hours

Default=0:00hours

Installer

STORM RUN TIMESelecttheamountofstormruntimetopre-heattheslabwhenadvisedofawinterstormwarning.

0:30to24:00hours

Default=8:00hours

Installer

SENSITIVITYSelecthowsensitiveSnow/IceSensoristowaterdetection.

Auto,Min,-2,-1,Mid,+1,+2,MaxDefault=Auto

Installer

WWSDSelectthetemperatureabovewhichthesnowmeltingsystemisshutoffduringwarmweather.Thisallowsthesnoworicetomeltofftheslabnaturally.

Auto,32to95°F(0.0to35.0°C)Default=Auto

Installer

CWCOSelectthetemperaturebelowwhichthesnowmeltingsystemisshutoffduringextremelycoldweather.Belowthistemperature,theheatlossoftheslabexceedsthecapacityoftheboilerorheatingappliance.

Off,-30to50°F(-34.5to10.0°C)Default=10°F

(-12.0°C)

Installer

Temp Menu

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Away Menu

Display Menu

Description Range Access

TEMPERATURE UNITSSelectFahrenheitorCelsiustemperatureunits.Conditions:Alwaysavailable.

°For°C UserInstaller

SCREEN BRIGHTNESSSelectthescreenbrightness.Conditions:Alwaysavailable.

0to100%Default=75%

UserInstaller

CLEAN SCREENTheCleanScreentimerlocksthescreenfor10secondsallowingtheusertowipethescreenwithamoistcloth.Donotusesolventstocleanthescreen.Conditions:Alwaysavailable.

No,Yes UserInstaller

AwaySelectawaytopreventsnowmeltingoperationandsaveenergy.

At HomeSelectathometoallowauto-maticsnowmeltingoperation.

Thehome/awaychangesdevicessystem-wide.AllthermostatsandcontrolsthataregroupedtogetheronatekmarNetsystemwillalsochangetogether.

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WiFi Menu

Time Menu

Description Range Access

WIFIEnableordisableWiFiconnectivity.Thehelpscreendisplaysthefollowinginformation:• IPAddress• SubnetMask• Gateway• MACAddressConditions:Alwaysavailable.

OfforOn UserInstaller

NETWORK SSIDSelecttheWiFinetworkfromthelist.Conditions:WiFiissettoOn.

ListofWiFiNetworks

UserInstaller

ZIP/POSTAL CODEEnteraUSZIPorCanadianpostalcode.TheZIP/PostalCodeisusedtoprovidethelocationfortheweatherinformation.TheweatherserviceisavailableintheUSAandCanadaonlyConditions:WiFiissettoOn.

USZIPformat12345

CanadaPostalCodeformat

A1B2C3

UserInstaller

TIME SOURCESelecttosettothetimeautomaticallyormanually.Conditions:WiFiissettoOn.

Auto,Manual

UserInstaller

Description Range Access

TIME SOURCESelecttosettothetimeautomaticallyormanually.AutoisonlyavailablewhenWiFiissettoOn.Conditions:Alwaysavailable.

Auto,Manual

UserInstaller

SET TIME AND DATEConditions:Timesourcesettomanual.

N/A UserInstaller

TIME FORMATSelecteither12or24hourformat.Conditions:Alwaysavailable.

12hr,24hr

Default=12hr

UserInstaller

TIME ZONESelectthelocation'stimezone.Conditions:AvailablewhenTimeSourceissettoManual.

Hawaii,Alaska,Pacific,Mountain,Central,Eastern,

Atlantic,NFLD,

(Newfoundland)

UserInstaller

DAYLIGHT SAVINGSSetDaylightSavingstoOntoautomaticallyadjustfortimechangesinthespringandfall.Conditions:Alwaysavailable.

OfforOnDefault=On

UserInstaller

BeforeusingtheWiFifeaturesofthisproduct,youmustaccepttheTermsofUse,asamendedfromtimetotimeandavailableatWatts.com/terms-of-use.Ifyoudonotaccepttheseterms,thisproductcanstillbeusedwithoutWiFifeatures.

• Pressboxfield.• Thenadjustwitharrowbuttons.

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Energy Menu

Amountoftimethesystemhasbeenoninhoursperday. Amountoftimethesystemhasbeenoninhourspermonth.

Description Range Access

MELTING HOURSRecordsthenumberofmeltinghourssincethecounterwaslastreset.Conditions:Alwaysavailable.

0to999999hours

UserInstaller

HEAT HOURSRecordsthenumberofhourstheboilerfiredortheelectriccableheatedsincethecounterwaslastreset.

0to999999hours

UserInstaller

HEAT CYCLESRecordsthenumberofcyclestheboilerturnedonortheelectriccableheatedsincethecounterwaslastreset.

0to999999cycles Installer

SYSTEM PUMPRecordsthenumberofhoursthesystempumphasoperatedsincethecounterwaslastreset.

0to999999hours Installer

SLAB SENSOR HIGHRecordsthehighestmeasuredslabtemperaturesincethecounterwaslastreset.Conditions:AvailablewhenSnow/IceissettoIn-slaborSlabSensorissettoOn

-58to167°F(-50.0to75.0°C) Installer

SLAB SENSOR LOWRecordsthelowestmeasuredslabtemperaturesincethecounterwaslastreset.Conditions:AvailablewhenSnow/IceissettoIn-slaborSlabSensorissettoOn

-58to167°F(-50.0to75.0°C) Installer

OUTDOOR HIGHRecordsthehighestmeasuredoutdoorairtemperaturesincethecounterwaslastreset.Conditions:Alwaysavailable.

-67to149°F(-55.0to65.0°C) Installer

OUTDOOR LOWRecordsthelowestmeasuredoutdoorairtemperaturesincethecounterwaslastreset.Conditions:Alwaysavailable.

-67to149°F(-55.0to65.0°C) Installer

RESET ALL?Resetsallthecountersinthemonitormenuatonce.Conditions:AlwaysAvailable.

No,Yes Installer

Monitor Menu

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Setup – System Setup MenuDescription Range Access

SNOW/ICE SENSORSelectifaSnow/IceSensor090or094"Inslab",oraSnowSensor095"Aerial"isinstalled.Conditions:Alwaysavailable.

None,In-slab,Aerial

Default=In-slabInstaller

SLAB SENSORSelectifaSlabSensor072or073isinstalled.Conditions:Availablewhensnow/icesensorissettoNoneorAerial.

OfforOnDefault=Off Installer

ECONOMELTEconoMeltallowstheusertomechanicallyremovesnowthenmanuallystartthesystemtomelttheremainingthinsnowlayeroricewithanautomaticstopwhenthesensorisdry.Requiressnow/icesensortobesettoin-slab

OfforOnDefault=Off Installer

MAX MELT DAYSLimittheamountofmeltingruntimeaftersnowisautomaticallydetectedbyaSnow/IceSensor090or094,oraSnowSensor095.Conditions:Alwaysavailable.

Off,0.5to7daysDefault=3days Installer

OUTDOOR SENSORSelectiftheoutdoorairtemperatureismeasuredbythecontrol,byatekmarNetsystemorbytheInternetweatherservice.Conditions:Alwaysavailable.

Control,tekmarNet,

InternetDefault=Control

Installer

Setup – Boiler Setup MenuDescription Range Access

BOILER TYPESelectthetypeofboileroperatedbythecontrol.Enable=Boilerrelayturnsontheheatsource.Control=CallforheattotekmarNetcontrol.Conditions:Availablewhenthe671isconnectedtoatekmarNetsystem.

Enable,Control Installer

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tekmarNet Menu

Description Range Access

ADDRESSINGThetekmarNetaddressofthiscontrol.Tomanuallysettheaddress,usetheupordownbuttons.

Auto,x:01tobusx:24, Installer

AUTO ADDRESSThetekmarNetaddressofthiscontrol.Conditions:AddressingissettoAuto

Autob:01tob:241:01to1:242:01to2:243:01to3:24

Installer

MANUAL ADDRESSThetekmarNetaddressofthiscontrolwhenmanuallyassignedConditions:AddressingissettoManual

Manualb:01tob:241:01to1:242:01to2:243:01to3:24

DEVICE COUNTProvidesacountofallthetekmarNetthermostats,setpointcontrolsandsnowmeltingcontrolsonthetekmarNetSystem. 1to24 Installer

SNOW MELT ZONESelectthesnowmeltingzonethatthiscontroloperates.Snowzone1hasthehighestprioritywhilesnowzone12hasthelowestpriority. 1to12 Installer

TRACK ZONESelecttotrackandrecordtherunninghoursofsnowzone1andrepeatthisruntimeonthiscontrol.Thisallowssnowmeltingzoneswithoutasnow/icesensortoautomaticallystart. OfforOn Installer

MELT GROUPAUserSwitchorGatewaymaybeusedtomanuallystartmeltingthezone.SettheMeltGroupnumbertothecorrespondingSetpointEnablenumberontheUserSwitch. 1to12 Installer

STORM GROUPAUserSwitchmaybeusedtomanuallystartstormoperationofthesnowzone.SettheMeltGroupnumbertothecorrespondingSetpointEnablenumberontheUserSwitch.

1to12 Installer

PRIORITYSelectthepriorityofthesnowmeltingsystem.

Off,Conditional,Full

Default=OffInstaller

AWAY SCENE SelectifthecontrolshouldacceptorignoretheawaycommandfromatekmarNetsystem.Conditions:Alwaysavailable.

OfforOnDefault=On Installer

TN4 SYSTEM PUMP SelectifthesystempumplocatedonthetekmarNetSystemControlshouldoperatewhenthesnowmeltzoneisheating.

OfforOn Installer

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Toolbox MenuDescription Range Access

ERROR CODEThecurrenterrorcodeisdisplayed.Conditions:Alwaysavailable.

SeeErrorCodeSection

UserInstaller

ACCESS LEVELSelecttheaccesslevelofthecontrol.Thisdetermineswhichmenusanditemsareavailablethroughtheuserinterface.Conditions:Alwaysavailable.

UserorInstallerDefault=Installer

UserInstaller

TYPE 671Productinformation.SW:J12881.0.0SVN:XXXConditions:Alwaysavailable.

J1288Last3numbers

indicatesoftwareversion

UserInstaller

LOAD DEFAULTSSelect“Yes”toreloadthefactorydefaultsonthecontrol.Conditions:Alwaysavailable.

No,Yes UserInstaller

Description Range Access

MANUAL OVERRIDEManuallyoverridethenormalautomaticoperationofthecontroltotesttheequipmentoroperatethesystematthemaximumtemperaturelimits.Auto=Normaloperation.MaxHeat=Operatehydronicsystematmaximumheat.Hand=Manualoverrideofeachrelayoutput.Purge=Hydronicsystempurgeoperatespumpstohelpbleedairfromthesystem.

Auto,Hand,

MaxHeat,Purge,

Off

UserInstaller

SYSTEM PUMPManuallyturnonthesystempumpduringtheHANDManualOverride.

OfforOnDefault=Off

UserInstaller

HEAT RELAYManuallyturnontheheatrelayduringtheHANDManualOverride.

OfforOnDefault=Off

UserInstaller

BOILER ENABLEManuallyturnontheboilerduringtheHANDManualOverride.

OfforOnDefault=Off

UserInstaller

HAND DURATIONSelecttheamountoftimethattheHANDOverrideisineffectbeforereturningtoAutomaticoperation.

0:10to72:00hours

Default=0:10hour

UserInstaller

MAX HEAT DURATIONSelecttheamountoftimethatMaxHeatisineffectbeforereturningtoAutomaticoperation.

0:10to72:00hours

Default=24:00hour

UserInstaller

PURGE DURATIONSelecttheamountoftimethatthePurgeisineffectbeforereturningtoAutomaticoperation.

0:10to72:00hours

Default=0:10hour

UserInstaller

Override Menu

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Sequence of OperationSnow Melting OverviewAsnowmeltingsystemcanofferasafe,convenient,andcosteffectivewayofremovingsnowandicefromthesnowmeltingslabandsimilarsurfaces.Safetyisincreasedbyactivatingthesnowmeltingsystemassoonasthesnowfallsratherthanwaitingformechanicalsnowremovalaftersnowhasaccumulated.Thiseliminatessliphazardsandreducestheriskofinjurybymechanizedsnowmeltingequipment,therebyreducingpotentialliabilitycosts.Theeliminationofsnowplowequipmentandcorrosivesaltsalsoreducesdamagetotheslabsurfaceandtotheenvironment.Whencontrolledcorrectly,snowmeltingsystemscanbecostcompetitivecomparedtomechanicalsnowremoval.Thesnowmeltingcontrolcanoperateinoneoffourdifferentways:

Melt Heatstheslabtomeltsnoworice.Defaultis36°F(2°C)Idle Preheatstheslabjustbelowfreezingtoshortenthe

timerequiredtomeltsnow.Defaultisoff.

Melt – Automatic Start and StopAutomaticstartandstopoperationrequirestheinstallationofaSnow/IceSensor090(65'or20mcable)or094(208'or63mcable).Thesensorisinstalledin-slablevelwiththemeltingsurface.Thecontrolcontinuallymonitorsthesensorforthepresenceofmoistureandslabtemperatureconditionsinwhichsnoworicemaybepresent.Whenmoistureisdetected,thecontrolshows“SensorWaterStatus–Wet”intheSlabStatusmenu.Whenthesensorisdrythecontrolshows“SensorWaterStatus–Dry”.ThecontrolincludesaSensitivitysettingintheTemperaturesmenuthatallowstheinstallertoadjusttheamountofmoisturerequiredtostartandstopthemeltingoperation.Inareaswithlowamountsofdustand/orairpollution,thesensitivitymayneedtobeincreased.ThedefaultsensitivitysettingisAuto.Thissettingallowsthecontroltoautomaticallydeterminethebestsuitablesensitivity

PushSTOPButton

090or094andSlabDryandAddMeltTimeElapses

or

Idle

Off WWSD

Gateway482or486StopMessage

090or094DetectsWater

ExitsCWCOMelt

Suspended

EntersCWCO

Melting

AutoStart/AutoStop

settingfortheinstallation.WhenmoistureisdetectedandthecontrolisnotinWWSDorCWCOorAway,thecontrolwillautomaticallystartthesnowmeltingsystem.Asthesnoworicemeltsandtheslabdriesoff,thesensoralsodriesoffatthesametime.Whenthesensorisdry,thesnowmeltsystemautomaticallyshutsoff.Iftherearelowspotsontheslabsurfacethatdryoffslowerthanthesensor,additionalmeltingruntimecanbeincludedbyadjustingtheAdditionalMeltTimesettingintheTemperaturesmenu.If the snow melting system is manually stopped, the snow/ice sensor must fully dry before it is able to detect a new snow fall and automatically start the snow melting system.

Snow/Ice Sensor 090 or 094

Theslabtemperaturemustreachtheslabtargetinorderforthesystemtoshutoffautomatically.Thecapacityoftheheatsourcemustbesizedtoensuremeltingaslowasthecoldweathercutoff.Inaddition,theheatsourcemaximumtemperaturesetting

mustbesettoprovidethefullcapacityoftheheatingappliance.Forexample,boileraquastatsshouldbesetto180°F(82°C).Failuretomeettheserequirementsmayresultinthesnowmeltingsystemnotautomaticallyshuttingoffwhentheslabisdry.

OutdoorTemperature

SlabTemperature

MELT

IDLEorSTORM

WWSD

CWCO

ControlentersIdleandwaits

forMeltEnable

Storm Temporarilypreheatstheslabjustbelowfreezingtoshortenthetimerequiredtomeltsnow.Defaultisoff.

Off SnowmeltingsystemisoffThedisplayshowsthecontroloperationinthehomescreen.

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Melt – EconoMelt

WhenaSnow/IceSensor090or094isinstalled,theinstallercanchoosetoselecttoeitherautomaticallyormanuallystartthesnowmeltingsystem.SelectingEconoMelttoOnallowssnowremovalusingasnowploworshovel.Theremainingthinlayerofsnoworicethatmechanicalsnowremovalmethodsareunabletoremovecanbemeltedusingthemanualstartoperation.Thesnowmeltingsystemstopswhenthesensorisdry.ThefactorydefaultforEconoMeltisOff.

PushMeltButton

Gateway482or486MeltMessage

ManualMeltSwitch

090andSlabDryandAddMeltTimeElapses

WWSD

PressStopButton

Melting

ManualStart/AutoStop

Off

ExitsCWCOMelt

Suspended

EntersCWCO

Melt – Automatic Start and Timed Stop

Automaticstartwithatimedstopoperationrequirestheinstal-lationofaSnowSensor095.Thesensorisaerialmountedonapolenearthemeltingsurface.ItishighlyrecommendedtoalsoinstallaSlabSensor072(20’or6mcable)or073(40’or12mcable)inordertoregulatetheslabtemperatureandoperatethesnowmeltingsystematthehighestpossibleefficiency.Thecontrolcontinuallymonitorsthesnowsensorforthepresenceofmoistureandslabtemperatureconditionsinwhichsnoworicemaybepresent.Whenmoistureisdetected,thecontrolwillshow“SensorWaterStatusWet”intheSlabStatusmenu.Whenthesensorisdrythecontrolwillshow“SensorWaterStatusDry”.ThecontrolincludesaSensitivitysettingintheTemperaturesmenuthatallowstheinstallertoadjusttheamountofmoisturerequiredtostartand

stopthemeltingoperation.Inareaswithlowamountsofdustand/orairpollution,thesensitivitymayneedtobeincreased.ThedefaultsensitivitysettingisAuto.Thissettingallowsthecontroltoautomaticallydeterminethebestsuitablesensitivitysettingfortheinstallation.WhenmoistureisdetectedandthecontrolisnotinWWSDorCWCOorAway,thecontrolautomaticallystartsthesnowmeltingsystem.ThesnowmeltingsystemoperatestoheattheslabtotheslabtargettemperatureandcontinuestooperateuntilthetimesetbytheManualMeltRunTimeintheTemperaturesmenuelapses.Ifthe095re-detectswater,thetimerisrestartedtooperateforthefullruntime.

Snow Sensor 095

095DetectsWater

ManualMeltRunTimeElapses

WWSD

PushStopButton

Gateway482or486StopMessage

CWCO

Melting

AutoStart/TimedStop

or

Idle

Off

095RedetectsWater

Additional Melting Time

DrySnow Ice Sensor

ASnow/IceSensor090or094automaticallyshutsoffthesnowmeltingsystemwhenthewatersensorisdry.Duetotheconstructionoftheslabandthelayoutoftheheatingpipeorelectricalcable,theremaybeareasthatdonotmeltcom-pletely.TheAdditionalMeltTimesettingintheTemperaturesmenuallowstheinstallertosetadditionmeltingtimeafterthesensorisdry.

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Melt – Manual Start and Timed StopThesnowmeltingsystemcanbestartedmanuallybyoneofthethreedifferentmethods:• TouchtheMeltbuttononthecontroldisplay• ThroughaGateway482or486meltrequestmessage• BymanuallyconnectingtheManualMeltandComwiring

terminals8and9together.Oncemanuallystartedandtheslabwarmsuptotheslabtarget,

PushMeltButton

Gateway482or486MeltMessageManualMeltSwitch

ManualMeltRunTimeElapses

WWSD

PushStopButton

Gateway482or486StopMessage

CWCO

Melting

ManualStart/TimedStop

or

Idle

Off

thesnowmeltingsystemrunsuntilthetimesetbytheManualMeltRunTimesettingintheTemperaturesmenuelapses.

IfamanualstarthasbeenprovidedandaSnow/IceSensordetectswater,thecontrolchangesfrommanualmelttoautomaticoperation.ThesnowmeltingsystemrunsuntilthesensorisdryandtheAdditionalMeltTimeelapses.

Tandem Snow/Ice Detection

The671canbepairedtogetherwitha654toallowtwoSnow/Icesensors090or094orSnowSensors095tobeinstalledforasinglezone.Thisprovidesfullredundancyandincreasesthesnowdetectionarea.Bothsensorsareusedtodetectsnoworiceandifeithersensoriswetthesnowmeltingzonestartsmelting.Thecontrolcontinuestooperateuntilbothsensorsaredry.Thisallowssnoworicedetectionoverawiderarea.Intheeventofasensorfailure,thecontrolcontinuestooperatenormally,givingbuildingmaintenancestafftimetotroubleshootandreplacethefaultysensorifnecessary.

PressMeltbuttontostartmeltingoperation

Melt - Tracked Start and StopThesnowmeltingsystemcanhavemultiplezones.Zoneshavetheoptiontotrackthemeltingruntimeofzone1.Thisisusefulincaseswherezone1hasanautomaticSnow/IceSensorinstalledandtheremainingzonesdonot.Thisallowszones2to12togainthefunctionalityofautomaticstartingandstoppingwithonlyoneSnow/Icesensorinstalledinthesystem.Whenzone1detectssnoworice,itstartsmelting.Zoneswithtrackingenabledcanalsostartmeltingunlesspriorityisselected.Whenthesensorinzone1isdryortheManualMeltRunTimehasfullyelapsed,itsendsasignaltothetrackedzonesthatzone1hasstopped.EachzonecancontinuetooperatetocompletetheirownAdditionalMeltTimeafterwhichthezonestopsheatingandreturnstotheOfforIdleoperation.Zoneswithpriorityselectedstartafterzone1hasfinishedmeltingandrepeatthesameruntimeaszone1.

Zone1

TrackMeltStartandStop

RecordsRun Time

Snow / IceSensor

SlabSensor

SlabSensor

Zone2 Zone3

RepeatsZone 1 RunTime + AddMelt Time

RepeatsZone 1 RunTime + AddMelt Time

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Idle OperationWhenthesnowmeltingsystemstartsfromacoldtemperature,theremaybealongtimedelaybeforetheslabiswarmenoughtomeltsnow.Thistimedelayallowssnowtoaccumulateontheslabwhichisnotacceptableinsomecommercialandinstitutionalapplications.Todecreasethestart-uptime,theslabcanbepre-heatedtomaintainaminimumtemperature.ThisisknownastheIdletemperature.Idlingrequireslargeenergyconsumptionandisgenerallyrecommendedforinstitutionaland/orcommercialinstallationswheresafetyconcernsareparamount.Thedisplayshows"SystemisIdling"whenthecontrolisinidleoperation.Whendesigningasnowmeltingsystem,anengineermayspecifytheamountofallowedsnowaccumulationastheSnow-FreeAreaRatio.Therearethreedifferentlevels.ASnow-FreeAreaRatioof1isdefinedasasystemthatmeltsallsnowasitfallswithnoallowedaccumulation.ThisrequiresthattheIdletemperaturebesetjustbelowfreezing.Examplesofthesetypesofapplicationsinclude:• Hospitalemergencyareas• Helicopterlandingpads• Parkinggarageramps

ASnow-FreeAreaRatioof0.5isdefinedasasystemwithpartialsnowaccumulationontheslabbutnotinallareas.

ThesetypesofsystemsmayalsouseIdlingbutusuallysetatatemperatureseveraldegreesbelowfreezingtoreduceenergyconsumption.Applicationsmayinclude:• Steepresidentialdriveways• Commercialsidewalks• LoadingdocksASnow-FreeAreaRatioof0isdefinedasasystemthatallowssnowaccumulation.Thesesystemsoperatethesnowmeltingsystemfromacoldstartresultinginthelowestenergyconsumptioncostsandthelongesttimestostartmeltingsnow.InthiscasesettheIdletooff.Thisisrecommendedformostresidentialapplicationssuchas:• Flatresidentialdriveways• Patios• ResidentialsidewalksSomesystemsaredesignedforkeepingaslabsurfacefreeoficeratherthanfreeofsnow.Themostcommonapplicationsinclude:• Carwashbaysandaprons• Aircrafthangeraprons• TurfconditioningongolfcoursegreensThesesystemsrequiretheuseofIdlingatornearfreezingthroughoutthewinterandmayresultinhighenergyconsumption.

Storm Operation

TheStormoperationcombinesthebenefitsofafastresponsetimetogetherwithloweroperatingcosts.Typicallythestormtemperatureissetbelowfreezingtomaximizeenergysavings.Whenthestormoperationismanuallystarted,thesnowmeltsystemheatstheslabuptothemeltingtemperatureandcompletesameltingcycle.

Manual Storm-----------------------------------ThestormoperationismanuallystartedbyaUserSwitch480and481oraGateway482.ThemanualstormusestheStormGroupnumberinthetekmarNetmenu.SetupProcedureStep1:Setthe671StormGroupnumberfrom1to12.Thedefaultis12.Step2:SettheUserSwitchortheGatewaytousethecorre-spondingStormGroupnumber.WhentheUserSwitchbuttonispressed,the671willentertheStormOperation.Likewise,activatingtheStormGroupontheGatewaycausethe671toentertheStormOperation.

UserSwitchButton

Gateway482StormEnable

StormRunTimeElapses

Awayscene

UserSwitchButton

Gateway482StormDisable

WWSDCWCO

StormOff

If

Then

forecast

© 2019 tekmar 671_D - 08/1929of36

671

tekmarNet

Snow MeltZone 1

Snow MeltZone 2

671

Snow Melt Zones and Priority

Dividingasystemintoanumberofsnowmeltingzonesandprioritizingthezoneoperationreducesthesizerequirementsofthehydronicheatingplantortheamperageoftheelectricalservicepanel.Thisresultsinlowerinitialcapitalcostofthesnowmeltingsystem.Thetradeoffisthatsomesnowmeltzonesmaynotbeabletomeltassoonasthesnowfallbeginsandtheusermusttoleratesnowaccumulationontheslab.ThesnowmeltsystemusingSnowMeltingControl654,670and671mayhaveupto12snowmeltzones.Zone1hasthehighestpriorityandzone12hasthelowest.TheprioritysettinginthetekmarNet®menuallowstheinstallertoselectthelevelofzonepriorityfortheentiresnowmeltsystem.Changingtheprioritysettingononecontrolwillupdateonallothersnowmeltcontrolsatthesametime.Thezonepriorityhas3settinglevels.Thereissomeriskthatlowerpriorityzonesmayiceupwhentheyareshutoffbythehigherpriorityzone.Forexample,ifahighpriorityzoneshouldfinishmeltingandallowalowerpriorityzonetostartmelting,andthenanewsnowfalloccurs,thehighpriorityzonewillshutoffthelowerpriorityzones.Thismaypotentiallyallowthelowerpriorityzonestoiceover.The

limitationsofzoningandusingprioritymustbecarefullyconsideredanddiscussedwiththebuildingownersandoccupantswhendesigningthesnowmeltingsystem.PrioritydoesnotapplywhentheapplicationmodeissettoBoiler.Inthismode,theboilerisdedicatedtoasinglesnowmeltingzonesopriorityisnolongerapplicable.

Slab Temperature Control

Controllingtheslabtemperatureiscriticaltominimizingthecostofsnowmelting.ThisrequiresthateitheraSnow/IceSensor090or094oraSlabSensor072or073isinstalled.TheSnow/IceSensorcontainsabuilt-inslabtemperaturesensor.Whilethecontrolcanoperatewithoutaslabsensorinstalled,operatingcostsaremuchhigher.Theslabisoperatedusingslaboutdoorreset.Astheoutdoortemperaturegetscolder,theheatlossoftheslabincreases.Inordertokeeptheslabsurfaceataconstanttemperaturewhileoperating,theinnercoreoftheslabmustbeheatedabovethemelt,idleorstormtemperaturesetting.Theamountthattheslabinnercoretemperatureisabovethemelt,idleorstormsettingisproportionaltotheoutdoortemperature.Sincetheslabsensorisinstalledbelowthesurfaceoftheslab,itisnotmeasuringthetrueslabsurfacetemperaturebutrathertheinnercoretemperature.Thecontrolautomaticallycompensatesforthistemperaturedifference.TheSlabitemin

theStatusmenudisplaystheactualmeasuredtemperature,soitisnormaltoviewslabtemperaturesthatexceedthemelt,idle,orstormtemperaturesettings.

Surface temperature = 35ϒF

Decreasing Air Temperature

Incr

easi

ng S

lab

Cor

e Te

mpe

ratu

re

SlabSurfaceTemperatureisConstant

SlabOutdoorResetSlabOutdoorReset

Core(sensor)iswarmer

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Priority = NoneAllzoneshavethesamepriorityandcanoperateatthesametime.Thissettingisrecommendedwhentheboilerplantcapacityissizedlargerthantheheatlossofallzonesatdesignconditions.

Priority = ConditionalThezonewiththelowerprioritystartsmeltingwhenthezonewithhigherpriorityiswarmenoughtomeltsnoworice.Thissettingisrecommendedwhentheboilerplantcapacityissizedtobelargerthantheheatlossofeachzonewithsomeextracapacity.

Priority = FullThezonewiththelowerprioritystartsmeltingoncethezonewithhigherpriorityhasfinishedmeltingallsnoworicefromtheslab.Thissettingisrecommendedwhentheboilerplantcapacityissizedtobethesameastheheatlossofeachzoneatdesignconditions.

Hydronic Priority Levels--------------------------------------------------------------------------------

Zone 1

MELT

OFF

Zone 2

MELT

OFF

Zone 1

MELT

OFF

Zone 2

MELT

OFF

Zone 1

MELT

OFF

Zone 2

MELT

OFF

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Thecontrolhasabuilt-intimeclockthatcanbesetmanually.Abattery-lessbackupallowsthecontroltokeeptimeforupto4hourswithoutpower.ThetimeclocksupportsautomaticadjustmentforDaylightSavingTime(DST)oncetheday,

monthandyearareentered.UsetheTimemenutosetthecorrecttime,day,monthandyear.

Time Clock

Away Operation

tekmarNet Scene Operation

Whileonvacationandawayfromabuilding,itmaynotbenecessarytooperatethesnowmeltingsystem.Theawayfeatureallowstheusertoshutoffthesnowmeltingsystemtomaximizeenergysavings.TheAwayfeaturecanbeactivatedthroughthe:

• Awaymenu• tekmarNetUserSwitch480or481• tekmarNetGateway482or486

ThetekmarNetsystemsupportsupto8scenes.The671supportstekmarNetscenes1(normaloperation)and2(away).DuringtekmarNetscenes3through8,the671remainsinscene1(normaloperation).

Warm Weather Shut Down

Cold Weather Cut Off

Duringwarmweather,theslabiswarmenoughtonaturallymeltsnoworice.ThecontrolhasaWarmWeatherShutDown(WWSD)settingintheTemperaturesmenuthatpreventsthecontrolfromenteringMelt,IdleorStormoperationinordertoconserveenergy.Thecontrolshows,"SystemisOff–WarmWeatherShutDown"onthedisplaywhenWWSDisineffect.

Automatic (Auto)ThecontrolentersWWSDwhenboththeslabtemperatureandtheoutdoortemperatureexceedtheMeltingSetpointtemperaturesettingbymorethan2°F(1°C).

Manual WWSDThecontrolentersWWSDwhentheoutdoorairtemperatureexceedstheWWSDsettingby1°F(0.5°C)andwhentheslabtemperatureexceeds34°F(1°C).ThecontrolexitsWWSDwhentheoutdoorairtemperaturefalls1°F(0.5°C)belowtheWWSDsettingoriftheslabtemperaturefallsbelow34°F(1°C).ThisallowstheMeltingSetpointsettingtobesethigherthantheWWSD.Thisisusefulwhenhighslabtemperaturesarerequiredtomeltthesnoworice.Anexampleofthisareinstallationsusingpavingbricksontopofsandandconcretelayers.

Maintainingthemeltingoridlingsetpointtemperatureduringextremelycoldtemperaturesisnotonlyexpensivebutmaybeimpossibleiftheheatlossoftheslabexceedstheinputcapacityoftheheatingplantorelectriccable.ThecontrolturnsthesnowmeltingsystemoffwhentheoutdoorairtemperaturedropsbelowtheColdWeatherCutOff(CWCO)temperature.Thisisasafetyandenergysavingmeasure.Thecontrolshows,"SystemisOff–ColdWeatherCutOff"onthedisplay

whenCWCOisineffect.WhenthetemperaturereachestheCWCOsettinginanactivelymeltingsystemwithan090or094,meltingissuspendeduntiltheoutdoortemperaturerisesabovetheCWCOsettingatwhichtimemeltingisresumed.Ifan090or094isnotinstalled,meltingisstoppedwhenCWCOisineffectandmeltingdoesnotresumewhenthetemperaturerisesabovetheCWCOsetting.

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Pulse Width Modulation Zone OperationThecontroloperatesthesystempumptooperatecontinuouslyduringmelt,idleandstormoperation.Theboilerrelaysandheatpumpsrelaysoperateona20-minutepulsewidthmodulationcycle.Therelayontimeisdeterminedbythecalculatedslabtargetandbythemeasuredslabtemperaturereading.Astheslabtemperaturereachestheslabtarget,theontimepercycleoftherelayisreducedtopreventtheslabtemperaturefromovershooting.Ifnoslabsensorisinstalledtheheatrelayremainson100%ofthetimeuntiltheMeltcirclehascompleted.

WhenconnectedtoatekmarNetsystem,the671canoperateaboiler(BoilerTypesettoEnable)oritcancallforheatfromthetekmarNetboilercontrol(BoilerTypesettoControl)

Relay operation:• Systempump—operatescontinuouslyduringmelting,

idlingorstorm• Heatrelay—cycleson/offusingPulseWidthModulationto

controltheslabtemperature• Boiler—cycleson/offusingPulseWidthModulationtocon-

troltheslabtemperature

© 2019 tekmar 671_D - 08/1933of36

Post Purge

ExercisingThecontroloperatesthesystempumpandheatrelayevery3daystopreventpumpandvalveseizure.

Theboilerorheatsourceisshutoffandthesnowmeltingsystemcontinuestooperatefor20secondstopostpurgeheatfromtheboilertotheload.

Outdoor SensorAnoutdoorairtemperatureisrequiredforproperoperation.ThecontrolhastheoptiontomeasureanoutdoorairsensorortheoutdoortemperaturecanbeprovidedthroughthetekmarNet

systemorthroughtheInternetweatherservice.ThisisselectedbytheOutdoorSensorsettingintheSystemSetupmenu.

1.Find:IfthecontrolshowstheWarningSymbol onthescreen,itisindicatingaproblemonthesystem.2.Identify:PresstheWarningSymboltoviewtheerrorcode.3.Solve:Usethechartbelowtomatchtheerrorcodetotheoneonthecontrol.Usethedescriptiontosolve

theproblem.

Error Messages (1 of 3)Description

TEMPERATURE MENU MEMORY ERRORAmemoryerroroccurredandthecontrolreloadedthefactorydefaultsettings.ThecontrolstopsoperationuntilallsettingsintheSetpointsmenuarechecked.Tocleartheerror,settheaccessleveltoInstallerandcheckallsettingsintheTempmenu.

SYSTEM SETUP MENU MEMORY ERRORAmemoryerroroccurredandthecontrolreloadedthefactorydefaultsettings.ThecontrolstopsoperationuntilallsettingsintheSystemSetupmenuarechecked.Tocleartheerror,settheaccessleveltoInstallerandcheckallsettingsintheSystemSetupmenu.

BOILER SETUP MENU MEMORY ERRORAmemoryerroroccurredandthecontrolreloadedthefactorydefaultsettings.ThecontrolstopsoperationuntilallsettingsintheBoilerSetupmenuarechecked.Tocleartheerror,settheaccessleveltoInstallerandcheckallsettingsintheBoilerSetupmenu.

tekmarNet MENU MEMORY ERRORAmemoryerroroccurredandthecontrolreloadedthefactorydefaultsettings.Thecontrolcontinuesoperationasnormal.Tocleartheerror,settheaccessleveltoInstallerandcheckallsettingsinthetekmarNetmenu.

WiFi MENU MEMORY ERRORAmemoryerroroccurredandthecontrolreloadedthefactorydefaultsettings.Thecontrolcontinuesoperationasnormal.Tocleartheerror,settheaccessleveltoInstallerandcheckallsettingsintheWiFimenu.

MAX MELT DAYS ERRORThecontrolhasoperatedinmeltingforthetimesetbytheMaximumMeltDayssetting.Thiserrorisusuallycreatedwhenthereisamechanicalsystemfailureresultinginthesnowmeltslabnotheatingcorrectly.CleartheerrormessagebytouchingtheResetbuttonwhileviewingtheerrormessage.

tekmarNet Communications ErrorThetekmarNetcommunicationbushaseitheranopenorashortcircuit.Theresultisthattherearenocommunications.Theerrorclearsautomaticallyoncethewiringfaulthasbeencorrected.Toforcetheerrortoclearwhileallowingashortoropencircuittocontinue,touchtheResetkey.

Troubleshooting

!Itisrecommendedtocompleteallwiringtoensuretroublefreeoperation.Shouldanerroroccur,simplyfollowthesesteps:

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Description

ADDRESS TAKEN ERRORTwodeviceshavebeenmanuallysettothesameaddress.ThedevicecontinuestooperatewiththiserrorbutdoesnotcommunicatewiththetekmarNetsystem.Toclearthiserror,selectanunusedtekmarNetaddressorselectautomaticaddressing.

SNOW ZONE TAKEN ERRORTwosnowmeltingcontrolshavebeenmanuallysettothesamesnowzonenumber.Thecontrolcontinuestooperatewiththiserror.Toclearthiserror,selectanunusedsnowzonenumber.

SYSTEM CONTROL LOST ERRORThethermostatcannolongercommunicatetothetekmarNetsystemcontrol.CheckforopenorshortcircuitsinthetekmarNetcommunicationwiring.TheerrorautomaticallyclearsoncethetekmarNetsystemcontrolhasbeendetected.IfthetekmarNetsystemcontrolwasintentionallyremovedfromthesystem,presstheResetbutton.

TANDEM SNOW/ICE SENSOR ERRORTherearetwoSnow/IceSensorsinstalledinthezoneandthetandemsnowmeltingcontrol654sensorhasaproblem.LocatetheothersnowmeltingcontrolandnavigatetotheToolboxmenutodetermineandcorrecttheproblem.Thecontrolcontinuestooperatewiththiserror.PresstheResetbuttontocleartheerror.

DEVICE LIMIT ERRORMorethan24deviceshavebeenconnectedtothetekmarNetcommunicationbus.Tocleartheerror,removeandrelocatedevicestootheravailablebusesuntilthedevicecountis24orless.

OUTDOOR SENSOR OPEN CIRCUIT ERRORThecontrolisunabletoreadtheOutdoorSensor070.Thecontrolcontinuestooperateandassumesanoutdoortemperatureof32°F(0°C).Checkforwiringfaultsanditmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

OUTDOOR SENSOR SHORT CIRCUIT ERRORThecontrolisunabletoreadtheOutdoorSensor070.Thecontrolcontinuestooperateandassumesanoutdoortemperatureof32°F(0°C).Checkforwiringfaultsanditmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SLAB SENSOR OPEN CIRCUITThecontrolisunabletoreadtheSlabSensor072or073.Checkforwiringfaultsanditmaybenecessarytoreplacetheslabsensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SLAB SENSOR SHORT CIRCUITThecontrolisunabletoreadtheSlabSensor072or073.Checkthewireforfaultsanditmaybenecessarytoreplacetheslabsensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SNOW SENSOR YELLOW WIRE OPEN CIRCUITThecontrolisunabletoreadtheyellowwireconnectedtotheSnow/IceSensor090or094ortheSnowSensor095.Automaticoperationisdisabledbutmanualstartisstillavailable.Checkthesnow/icesensoryellowandblackwiresandanywiresplicesforfaults.Itmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SNOW SENSOR BLUE WIRE OPEN CIRCUIT ERRORDuetoanopencircuit,thecontrolisunabletoreadthebluewireconnectedtotheSnow/IceSensor090or094,ortheSnowSensor095onterminals2and3.Thecontrolcannolongerautomaticallydetectsnoworice,butmanualstartofthesnowmeltingsystemisstillavailable.Checkthesnow/icesensororsnowsensorblueandblackwiresandanywiresplicesforopencircuitsaccordingtothesensorinstallationmanual.Itmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SNOW SENSOR BROWN WIRE SHORT CIRCUIT ERRORThecontrolisunabletoreadthebrownwireconnectedtotheSnow/IceSensor090or094.Checkthesnow/icesensorbrownandblackwiresforfaults.Itmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SNOW SENSOR BROWN WIRE OPEN CIRCUIT ERRORDuetoanopencircuit,thecontrolisunabletoreadthebrownwireconnectedtotheSnow/IceSensor090or094onterminals2and5.IdlingandStormisdisabledandenergysavingfeaturessuchasWarmWeatherShutDown(WWSD)andColdWeatherCutOff(CWCO)areoperatedusingtheoutdoortemperatureonly.Checkthesnow/icesensorbrownandblackwiresforopencircuitsaccordingtothesensorinstallationmanual.Itmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

Error Messages (2 of 3)

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Symptom Look For... Corrective Action

Touchscreen is off Power to control Useelectricalmetertomeasure115V(ac)voltageoninputpowerLandN

terminals.

System pump always on Display shows Idle Idleoperationrequiresthatthesystempumpoperatecontinuouslywhilebelowthe

meltingtemperaturesetting.

Blue short Dirt or salt on snow/ice sensor

Thesnow/icesensorrequiresregularcleaning.Avoidusingroadsaltonthesnowmeltingslab.

Slab is above melt temperature

Slab Target Theslabisheatedtotheslabtarget.

System running with no snow

System is Idling IdlingheatstheslabwhenthetemperaturefallsbelowtheIdletemperature.

System is MeltingDuringcoldweathercutoff(CWCO),thesystemisshutoff.Ifitshutsoffduringameltcycle,thesystemresumesmeltingoncetheoutdoortemperatureisaboveCWCO.

Remaining Run Time Systemmanuallystarted.

Slab and Slab Target

Theslabmustreachtheslabtargettemperatureinorderforthesystemtoshutoff.Lowerthecoldweathercutoff(CWCO)orincreasetheboileraquastatsetting.

Snow on slab but system did not start

System is Off Systemhasbeenmanuallystoppedandtheautomaticsnow/icesensorneverdried,therebypreventingthesystemfromautomaticallystarting.

Cannot register device

Check WiFi signal strength Mayneedtomovecontrolorrouterlocation.

Frequently Asked Questions Description

SNOW/ICE SENSOR ERRORThecontrolisunabletoproperlydetecttheSnow/IceSensor090or094onterminals1,2,3,4and5.Thecontrolcannolongerautomaticallydetectsnoworice,butmanualstartofthesnowmeltingsystemisstillavailable.Checkthesnow/icesensorbrown,yellow,redandblackwiresaccordingtothesensorinstallationmanual.Itisimportanttocheckanycablesplicesforloosewiringconnections.Itmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

SNOW SENSOR ERRORThecontrolisunabletoproperlydetecttheSnowSensor095onterminals1,2,3,and4.Thecontrolcannolongerautomaticallydetectsnowbutmanualstartofthesnowmeltingsystemisstillavailable.Checkthesnowsensoryellow,redandblackwiresaccordingtothesensorinstallationmanual.Itmaybenecessarytoreplacethesensor.Oncetheerrorhasbeencorrected,theerrormessageautomaticallyclears.

Frequently Asked Questions

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All specifications are subject to change without notice

Limited Warranty The liability of tekmar under this warranty is limited. The Purchaser, by taking receipt of any tekmar product (“Product”), acknowl-edges the terms of the Limited Warranty in effect at the time of such Product sale and acknowledges that it has read and understands same.

The tekmar Limited Warranty to the Purchaser on the Products sold hereunder is a manufacturer’s pass-through warranty which the Purchaser is authorized to pass through to its customers. Under the Limited Warranty, each tekmar Prod-uct is warranted against defects in workmanship and materials if the Product is installed and used in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass-through warranty period is for a period of twen-ty-four (24) months from the production date if the Product is not installed during that period, or twelve (12) months from the documented date of installation if installed within twenty-four (24) months from the production date.

The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s sole discretion: the cost of parts and labor provided by tekmar to repair defects in materials and / or workmanship of the defective product; or to the exchange of the defective product for a warranty replacement product; or to the granting of credit limited to the original cost of the defective product, and such repair, exchange or credit shall be the sole remedy available from tekmar, and, without limiting the foregoing in any way, tekmar is not responsible, in contract, tort or strict prod-uct liability, for any other losses, costs, expenses, inconveniences, or damages, whether direct, indirect, special, secondary, incidental or consequential, arising from ownership or use of the product, or from defects in workmanship or materials, including any liability for fundamental breach of contract.

The pass-through Limited Warranty applies only to those defective Products returned to tekmar during the warranty period. This Limited Warranty does not cover the cost of the parts or labor to remove or transport the defective Product, or to reinstall the repaired or replacement Product, all such costs and expenses being subject to Purchaser’s agreement and warranty with its customers.

Any representations or warranties about the Products made by Purchaser to its cus-tomers which are different from or in excess of the tekmar Limited Warranty are the Purchaser’s sole responsibility and obligation. Purchaser shall indemnify and hold

tekmar harmless from and against any and all claims, liabilities and damages of any kind or nature which arise out of or are related to any such representations or war-ranties by Purchaser to its customers.

The pass-through Limited Warranty does not apply if the returned Product has been damaged by negligence by persons other than tekmar, accident, fire, Act of God, abuse or misuse; or has been damaged by modifications, alterations or attachments made subsequent to purchase which have not been authorized by tekmar; or if the Product was not installed in compliance with tekmar’s instructions and / or the local codes and ordinances; or if due to defective installation of the Product; or if the Prod-uct was not used in compliance with tekmar’s instructions.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING LAW ALLOWS PARTIES TO CONTRACTU-ALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURA-BILITY OR DESCRIPTION OF THE PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND ITS COMPLIANCE WITH OR NON-VIOLATION OF ANY APPLICABLE ENVIRONMENTAL, HEALTH OR SAFETY LEGISLATION; THE TERM OF ANY OTHER WARRANTY NOT HEREBY CONTRACTUALLY EXCLUDED IS LIMITED SUCH THAT IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION DATE, TO THE EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE GOVERNING LAW.

Product Warranty Return Procedure All Products that are believed to have defects in workmanship or materials must be returned, together with a written description of the defect, to the tekmar Representative assigned to the territory in which such Product is located. If tekmar receives an inquiry from someone other than a tekmar Representative, including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers, regarding a potential warranty claim, tekmar’s sole obligation shall be to provide the address and other contact informa-tion regarding the appropriate Representative.

WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information: Watts.com/prop65

Limited Warranty and Product Return Procedure

Technical DataWiFi Snow Melting Control 671 Pulse Width ModulationLiterature 671_A,671_C,671_D,671_J,671_UControl Microprocessorcontrol.Thisisnotasafety(limit)control.Packagedweight 4.3lb.(1960g)Dimensions 6-5/8"Hx7-9/16"Wx2-13/16"D(170x193x72mm)Display 3.5",colortouchscreenEnclosure BluePVCplastic,NEMAtype1Approvals CSACUS,meetsclassB:ICES&FCCPart15Ambientconditions -4to122°F(-20to50°C),<90%RHnon-condensing,outdoorusepermittedwhenusedinNEMA3enclosurePowersupply 115V(ac)±10%,60Hz,20VARelays 230V(ac),5A,1/3hpManualmeltcall Shortor0-32V(ac)Communications WiFi802.11n,2.4GHz,WPA2encryptionSensors NTCthermistor,10kΩ@77°F(25°C±0.2°C)ß=3892

–Included OutdoorSensor070–Optional tekmartype:072,073,087,090,094,095