Watts 300154 Installation guide

Brand: Watts

Model: 300154

Category: Thermostats

Type: Installation guide

This manual is also suitable for



 of56 ©203WattsRadiant





AutomaticSnow/IceDetection

SupportsBothInslab&RetrofitAerialSensors

ManualStartWithTimer

ProgrammableSchedule

tekmarNet

CommunicationCompatible

WarmWeatherShutDown

ColdWeatherCutOut

Idling

SnowMeltZoningWithPriority

TandemSnow/IceDetection

SlabProtection

Storm

EconoMelt

ManualOverride

SnowMeltZoneTracking

Scenes

AwayKey

Exercising

AlertOutput

•



TheSnowMeltingControl654isdesignedtooperateelectricorhydronicequipmenttomeltsnoworicefromadriveway,

loadingdock,sidewalk,patio,helipadorcarwashbay.Thesnowmeltsurfacetemperatureiscontrolledusingslaboutdoor

resettoreduceoperatingenergycosts.The654providesautomaticstartandstopwhenusedwiththeSnow/IceSensor

090.AutomaticstartwithatimedstopisavailablewhenusedwiththeSnowSensor095.The654canoperateadedicated

hydronicboileroramixingdevice.Isolationrelaysarerequiredtooperatelinevoltagepumps.Electricsystemsrequirea

separateGFCIandelectricalrelaycontactor.

IOM-WR-Snow_Melting_Control-654328 2of56

ImportantSafetyInformation.............................................3

Applications.......................................................................4

SingleZonewithBoiler.................................................. 4

SingleZonewithBoiler&TandemSnow/IceSensors........6

SingleZonewithModulatingSteamValve.................... 8

Multi-ZoneCarWash.................................................... 0

Multi-ZoneElectric........................................................ 2

Installation........................................................................4

Preparation................................................................... 4

PhysicalDimensions.................................................... 4

InstallationLocation...................................................... 4

Rough-InWiring............................................................ 4

SizingtheTransformer................................................. 5

ControlWiring............................................................... 5

SensorWiring............................................................... 7

TestingtheSensorWiring............................................ 8

TestingtheControlWiring............................................ 8

ManualOverride-MaximumHeat............................... 9

ManualOverride-Test................................................. 9

ManualOverride-Purge.............................................. 9

ManualOverride-Off................................................... 9

SwitchSettings.................................................................9

UserInterface...................................................................20

Display.......................................................................... 20

OperationField............................................................. 20

StatusField................................................................... 20

Symbols........................................................................ 20

ProgrammableSettings....................................................2

ProgrammingMenus.................................................... 2

AccessLevelsandAccessLevelLock........................ 2

ViewMenu.................................................................... 22

SetTempMenu............................................................ 24

TimeMenu.................................................................... 25

ScheduleMenu............................................................ 26

DisplayMenu................................................................ 27

SceneMenu................................................................. 27

MonitorMenu................................................................ 28

ToolboxMenu............................................................... 29

OverrideMenu.............................................................. 30

SystemMenu................................................................ 3

BoilerMenu.................................................................. 32

MixMenu...................................................................... 33

tekmarNet

Menu......................................................... 34

SequenceofOperation................................................... 35

SnowMeltingOverview................................................ 35

SlabTemperatureControl............................................ 35

MeltOperation.............................................................. 35

Melt-ManualStartandTimedStop............................ 36

Melt-AutomaticStartandStop................................... 36

Melt-EconoMelt........................................................... 37

Melt-AutomaticStartandTimedStop........................ 37

Melt-TrackedStartandStop...................................... 38

Melt-ScheduledStartandStop.................................. 38

AdditionalMeltingTime................................................ 39

IdleOperation............................................................... 39

StormOperation........................................................... 39

WarmWeatherShutDown........................................... 40

ColdWeatherCutOut.................................................. 40

AwayScene.................................................................. 40

ProgrammableSchedules............................................ 4

TimeClock.................................................................... 4

SnowMeltZonesandPriority...................................... 4

SlabProtection............................................................. 43

ApplicationModes........................................................ 43

ElectricOperation......................................................... 43

PulseWidthModulationOperation.............................. 43

BoilerOperation........................................................... 43

MixingOperation.......................................................... 45

PipingofVariableSpeedInjectionSystems................ 46

DesignProcedure......................................................... 47

TandemSnow/IceDetection...................................... 48

Exercising..................................................................... 48

AlertRelay.................................................................... 48

PumpPostPurge.......................................................... 48

MeltandStormGroups................................................ 49

UserSwitchSetup........................................................ 49

Troubleshooting................................................................50

ErrorMessages............................................................ 50

FrequentlyAskedQuestions........................................ 54

JobRecord...................................................................... 54

TechnicalData..................................................................56

HydronicSystemElectronicControlsandThermostats

LimitedWarranty..............................................................56

CongratulationsonthepurchaseofyournewSnowMeltingControl!

Thismanualcoversthecompleteinstallation,programmingandsequenceofoperationforthiscontrol.Youwillalsofind

instructionontesting,commissioning,andtroubleshootingthecontrolandsystemthatitoperates.





 3of56 ©203WattsRadiant

Theinstallermustensurethatthiscontrolanditswiringare

isolatedand/orshieldedfromstrongsourcesofelectromagnetic

noise.Conversely,thisClassBdigitalapparatuscomplies

withPart5oftheFCCRulesandmeetsallrequirementsof

theCanadianInterference-CausingEquipmentRegulations.

However,ifthiscontroldoescauseharmfulinterferenceto

radioortelevisionreception,whichisdeterminedbyturning

thecontroloffandon,theuserisencouragedtotrytocorrect

theinterferencebyre-orientatingorrelocatingthereceiving

antenna,relocatingthereceiverwithrespecttothiscontrol,

and/orconnectingthecontroltoadifferentcircuitfromthat

towhichthereceiverisconnected.

CetappareilnumériquedelaclasseBrespectetoutes

lesexigencesduRèglementsurlematérielbrouilleurdu

Canada.



Improperinstallationandoperationofthiscontrolcould

resultindamagetotheequipmentandpossiblyeven

personalinjuryordeath.

Thiselectroniccontrolisnotintendedforuseasaprimary

limitcontrol.Othercontrolsthatareintendedandcertified

assafetylimitsmustbeplacedintothecontrolcircuit.

Donotattempttoservicethecontrol.Therearenouser

serviceablepartsinsidethecontrol.Attemptingtodoso

voidswarranty.

•



Itis

theinstallers

responsibilitytoensurethatthiscontrolissafelyinstalledaccordingtoallapplicablecodes

andstandards.WattsRadiantisnotresponsiblefordamagesresultingfromimproperinstallationand/or

maintenance.

ReadManualandallproductlabels

BEFOREusingtheequipment.Donot

useunlessyouknowthesafeandproper

operationofthisequipment.

KeepthisManualavailableforeasy

accessbyallusers.

ReplacementManualsareavailableat

WattsRadiant.com

•

Disconnectallpowerbeforeopeningthe

control.

•



IOM-WR-Snow_Melting_Control-654328 4of56

Option

Snow/IceSensor090

Option2

SnowSensor095and

SlabSensor072

Option3

SlabSensor072

Outdoor

Sensor070

Relay Relay

Boiler

Supply

Sensor

082

System

Pump

ModulatingBoiler

654



ASnowMeltingControl654operatesahydronicsnowmeltingsystemusingamodulatingboilerandasystempump.The

boilerispipedinprimary-secondarytothesnowmeltsystemtoallowthesystempumptooperatecontinuouslyduringmelting

oridlingwhileallowingtheboilerandboilerpumptoturnonandoffasrequired.Theboilerfiringrateismodulatedusinga

0-0V(dc)or4-20mAsignal.Theslabisheatedtomaintaintheslabtargettemperature.WhenaSnow/IceSensor090is

installed,thesystemautomaticallystartswhensnoworiceisdetectedandcontinuestorununtiltheslabisdry.WhenaSnow

Sensor095isinstalledtogetherwithaSlabSensor072,thesystemautomaticallystartswhensnowisdetectedandrunsona

timerbeforeshuttingoff.AllsystemscanbemanuallystartedandshutoffusingatimerwheneitheraSnow/IceSensor090or

aSlabSensor072isinstalled.



 

APPMODE BOIL

BOILTYPE MOD(modulatingboiler)

AUXRELAY SYS(systempump)



 



 Autostart/Autostop Snow/IceSensor090

2 Autostart/Timedstop SnowSensor095&SlabSensor072

3 Manualstart/Timedstop SlabSensor072

 



 5of56 ©203WattsRadiant

Snow/Ice

Sensor090

Outdoor

Sensor

070

Supply

Sensor

082

Relay

System

Pump

Relay

Optional

tN4

Communication

Snow

Sensor095

Slab

Sensor072

Slab

Brn

Slab

Brn

Com

BlkYel Blu Red

Com

BlkYel Blu Red

Or And/Or

































C tN4

Modulating

Boiler

–+

Transformer

Snow

Sensor

095

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power



5V(ac)

 

IOM-WR-Snow_Melting_Control-654328 6of56



AsinglezoneincludestwoSnow/IceSensors090forTandemSnow/IceDetectionforawidersnoworicedetectionareaand

backupshouldoneofthetwosensorsfail.Whensnoworiceisdetectedthesnowmeltingsystemisautomaticallystartedand

stopswhentheslabisdry.EachsensorrequiresaSnowMeltingControl654.ThemasterSnowMeltingControl654operates

ahydronicsnowmeltingsystemusingamodulatingboilerandasystempump.Theboilerispipedinprimary-secondaryto

thesnowmeltsystemtoallowthesystempumptooperatecontinuouslyduringmeltingoridlingwhileallowingtheboiler

andboilerpumptoturnonandoffasrequired.Theboilerfiringrateismodulatedusinga0-0V(dc)or4-20mAsignal.The

memberSnowMeltingControlmonitorstheSnow/IceSensorandrelaysthesensorinformationtothemastercontrolusing

tekmarNet

communication.

Outdoor

Sensor070

Relay Relay

Boiler

Supply

Sensor

082

System

Pump

ModulatingBoiler

Snow/Ice

Sensor090

654

Master

654

Member

Snow/Ice

Sensor090



 

APPMODE BOIL

BOILTYPE MOD(modulatingboiler)

AUXRELAY SYS(systempump)









 Autostart/Autostop Snow/IceSensor090



 

APPMODE 090

 

 7of56 ©203WattsRadiant



Outdoor

Sensor

070

Supply

Sensor

082

5V(ac)

Relay

System

Pump

Relay

































ModulatingBoiler

–+

Transformer

Snow/Ice

Sensor090

654Member

654Master

Snow/Ice

Sensor090

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

 

IOM-WR-Snow_Melting_Control-654328 8of56



ASnowMeltingControl654operatesamodulatingsteamvalveandasystempump.Theheatsourcemaybeeitherdistrict

steamorasteamboiler.Theslabtemperatureiscontrolledbyadjustingthesteamvalvepositionusingananalog0to0

V(dc)or4to20mAsignal.Theslabisheatedtomaintaintheslabtargettemperature.WhenaSnow/IceSensor090is

installed,thesystemautomaticallystartswhensnoworiceisdetectedandcontinuestorununtiltheslabisdry.WhenaSnow

Sensor095isinstalledtogetherwithaSlabSensor072,thesystemautomaticallystartswhensnowisdetectedandrunsona

timerbeforeshuttingoff.AllsystemscanbemanuallystartedandshutoffusingatimerwheneitheraSnow/IceSensor090or

aSlabSensor072isinstalled.



  

 Autostart/Autostop Snow/IceSensor090

2 Autostart/Timedstop SnowSensor095&SlabSensor072

3 Manualstart/Timedstop SlabSensor072



 

APPMODE MIX

BOILTYPE OFF

AUXRELAY SYS(systempump)

Outdoor

Sensor070

Relay

Mix

Supply

Sensor

082

DistrictSteam

System

Pump

Modulating

SteamValve

654

Option

Snow/Ice

Sensor090

Option2

SnowSensor095and

SlabSensor072

Option3

SlabSensor072

 

 9of56 ©203WattsRadiant



5V(ac)

Snow/Ice

Sensor090

Outdoor

Sensor

070

Supply

Sensor

082

Relay

Optional

tN4

Communication

Snow

Sensor095

Slab

Sensor072

Slab

Brn

Slab

Brn

Com

BlkYel Blu Red

Com

BlkYel Blu Red

Or And/Or

















Snow

Sensor

095

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Modulating

SteamValve

System

Pump

–

tN4

Transformer

 

IOM-WR-Snow_Melting_Control-654328 0of56



Acarwashcanhaveupto2baysandapronseachhavinganicemeltingsystemoperatedbyaSnowMeltingControl654.A

boilerorwaterheaterheatsastoragetankwhichisusedforhotwatertowashvehiclesandheattheicemeltingsystem.The

controlusesaSlabSensor072tomeasuretheslabtemperatureandoperatesthezonetoensuretheslabisabovefreezing.

Aprogrammablescheduleisusedtooperatetheicemeltingsystemduringthecarwashbusinesshoursandshutsoffthe

systemwhenthecarwashisclosed.



 

APPMODE PWM

BOILTYPE OFF

AUXRELAY SYS(systempump)

OUT/BRET OUT



 

APPMODE PWM

BOILTYPE OFF

AUXRELAY SYS(systempump)

OUT/BRET OFF

 

Outdoor

Sensor

070

Freeze

Protection

Aquastat

Zone2

Pump

Boiler

System

Pump

Slab

Sensor072

Zone

Pump

Relay

Zone

Zone2

654

Slab

Sensor072

Relay

Supply

Sensor082

Supply

Sensor082

 of56 ©203WattsRadiant

Outdoor

Sensor

070

Freeze

Protection

Aquastat

Zone

Pump

Relay

Transformer

5V(ac)

Relay Relay

Zone2

Pump

System

Pump

Supply

Sensor

082

Zone Zone2

Supply

Sensor

082

Slab

Sensor

072

Slab

Sensor

072

C R

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

















































 

IOM-WR-Snow_Melting_Control-654328 2of56



Anelectricsnowmeltingsystemhasupto2zones.Zonehaspriorityoverzones2through2.EachSnowMeltingControl

654isconnectedtoanelectricalcontactorwhichinturnenergizestheelectriccables.Wheneverthezoneelectricalcontactor

isshutoff,zone2isabletooperate.Eachslabisheatedtomaintainitsslabtargettemperature.WhenaSnow/IceSensor

090isinstalled,thesystemautomaticallystartswhensnoworiceisdetectedandcontinuestorununtiltheslabisdry.Whena

SnowSensor095isinstalledtogetherwithaSlabSensor072,thesystemautomaticallystartswhensnowisdetectedandruns

onatimerbeforeshuttingoff.AllsystemscanbemanuallystartedandshutoffusingatimerwheneitheraSnow/IceSensor

090oraSlabSensor072isinstalled.



 

APPMODE ELEC

OUT/BRET OUT

PRIORITY COND(conditional)



 

APPMODE ELEC

OUT/BRET OFF

PRIORITY COND(conditional)









 Autostart/Autostop Snow/IceSensor090

2 Autostart/Timedstop SnowSensor095&SlabSensor072

3 Manualstart/Timedstop SlabSensor072

Outdoor

Sensor070

Electrical

Power

Supply

Zone

Zone2

654

Option

Snow/IceSensor090

Option2

SnowSensor095andSlab

Sensor072

Option3

SlabSensor072

Alert

Equipment

Alert

Equipment

Option

Snow/IceSensor090

Option2

SnowSensor095andSlab

Sensor072

Option3

SlabSensor072

 

ProMelt

Contactor

ProPanel

Electrical

Power

Supply

ProMelt

Contactor

ProPanel

 3of56 ©203WattsRadiant

Snow/Ice

Sensor090

Outdoor

Sensor

070

Zone

Zone2

ProMelt

Contactor

ProPanel

CP-50

CP-00

CP-200

ProMelt

Contactor

ProPanel

CP-50

CP-00

CP-200

Optional

Alert

Equipment

Optional

Alert

Equipment

Snow

Sensor095

Slab

Sensor072

Snow/Ice

Sensor090

Snow

Sensor095

Slab

Sensor072

Slab

Brn

Slab

Brn

Com

BlkYel Blu Red

Com

BlkYel Blu Red

Or And/Or

24V C PM

Slab

Brn

Slab

Brn

Com

BlkYel Blu Red

Com

BlkYel Blu Red

Or And/Or

24V C PM

Snow

Sensor

095

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Snow

Sensor

095

 

IOM-WR-Snow_Melting_Control-654328 4of56



-----------------------------------------------------------------------------------------

Jewellerscrewdriver

Phillipsheadscrewdriver

•

Needle-nosePliers

WireStripper

•



-------------------------------------------------------------------------------------

8AWGLVTSolidWire(LowVoltageConnections)•

24V(ac)Transformer

•

Whenchoosingthelocationforthecontrol,considerthe

following:

InteriorWall.

Keepdry.Avoidpotentialleakageontothecontrol.

RelativeHumiditylessthan90%.Non-condensing

environment.

Noexposuretoextremetemperaturesbeyond-4to

22°F(-20to50°C).

Nodraft,directsun,orothercauseforinaccurate

temperaturereadings.

•

Awayfromequipment,appliances,orothersourcesof

electricalinterference.

Easyaccessforwiring,viewing,andadjustingthedisplay

screen.

Approximately5feet(.5m)offthefinishedfloor.

Themaximumlengthofwireis500feet(50m).

Stripwireto3/8"(0mm)forallterminalconnections.

Usestandard8conductor,8AWGwire.

•



-------------------------------------------------------------------------------------

Eachcablemustbepulledfromtheequipmenttothecontrol’s

plasticenclosure.Alllowvoltagewiringconnectionsenter

theenclosurethroughthesquareknockoutontherear.Itis

recommendedtolabeleachcableforeasyidentification.All

lowvoltagewiresaretobestrippedtoalengthof3/8"(9mm)

toensureproperconnectiontothecontrol.





SnowSensor095





Snow/IceSensor090

•





24V(ac)powerfromtransformer

Outdoortemperaturesensor

Supplysensor(ifapplicable)

On/offboiler(ifapplicable)

Modulatingboiler0-0V(dc)or4-20mA(ifapplicable)

Mixingvalveormixinginjectionpump0-0V(dc)or4-20

mA(ifapplicable)

Boilerreturntemperaturesensor(ifapplicable)

Alertoutput(ifapplicable)

tekmarNet

4communicationtootherdevices

Slabsensor072(ifapplicable)

•

FrontView

(127 mm)

3-1/4"

(82 mm)

SideView

15/16"

(23 mm)

MountingBase

654

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

ComCom

BlkYel Blu Red Sup

No Power

1-1/2"

(38 mm)

9/16"

(14 mm)

1-7/8"

(47 mm)

3/4"

(19 mm)

13/16"

(20 mm)

(102 mm)

2-1/2"

(64 mm)

29/32"

(23 mm)

3-1/4"

(83 mm)











 5of56 ©203WattsRadiant

Snow/Ice

Sensor090

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Snow

Sensor095

Slab

Sensor072

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Snow

Sensor

095

Thecontrolrequiresanexternaltransformer.Thetotalpowercapacityofthepowersupplyshouldbelargerthanthetotal

loadofallthedevicesconnectedtothecontrol.Thistotalloadmustnotexceed00VA.



-----------------------------------



------------------------------



----------

Outdoor

Sensor

070

Boiler

Return

Sensor

082

Supply

Sensor

082

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power



---------

ModulatingBoiler

MixingValveor

MixingInjectionPump

0-0V(dc)Signal

tekmarNet

Communication

– +

tN4 C

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power





(ifapplicable)

IOM-WR-Snow_Melting_Control-654328 6of56



----------------------------------------------------------------------------------------



---------------------------------------------------------------------------------------------

Alert

Equipment

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power

Relay

System

Pump

Relay

































Transformer

On/OffBoiler

Slab

Brn

Mod

tN4Aux Ht R C

Bret

Out/

Com–

BlkYel Blu Red Sup

No Power



5V(ac)

Thetemperaturesensor(thermistor)isbuiltintothesensor

enclosure.

Removethescrewandpullthefrontcoveroffthesensor

enclosure.

Theoutdoorsensorcaneitherbemounteddirectlyontoa

wallora2

x4

electricalbox.Whentheoutdoorsensoris

wallmounted,thewiringshouldenterthroughthebackor

bottomoftheenclosure.Donotmounttheoutdoorsensor

withtheconduitknockoutfacingupwardsasraincouldenter

theenclosureanddamagethesensor.

Inordertopreventheattransmittedthroughthewallfrom

•

affectingthesensorreading,itmaybenecessarytoinstall

aninsulatingbarrierbehindtheenclosure.

Theoutdoorsensorshouldbemountedonawallwhichbest

representstheheatloadonthebuilding(anorthernwall

formostbuildingsandasouthernfacingwallforbuildings

withlargesouthfacingglassareas).Theoutdoorsensor

shouldnotbeexposedtoheatsourcessuchasventilation

orwindowopenings.

Theoutdoorsensorshouldbeinstalledatanelevation

abovethegroundthatwillpreventaccidentaldamage

ortampering.

•



----------------------------------------------------------------------------------

Sensorwithbottom

entrywiring

Sensorwithrear

entrywiring

Sensormounted

onto2"x4"

electricalbox

Connect8AWGorsimilarwiretothetwoterminalsprovidedinthe

enclosureandrunthewiresfromtheoutdoorsensortothecontrol.Do

notrunthewiresparalleltotelephoneorpowercables.Ifthesensor

wiresarelocatedinanareawithstrongsourcesofelectromagnetic

interference(EMI),shieldedcableortwistedpairshouldbeusedor

thewirescanberuninagroundedmetalconduit.Ifusingshielded

cable,theshieldwireshouldbeconnectedtotheComterminalon

thecontrolandnottoearthground.

Followthesensortestinginstructionsinthisbrochureandconnect

thewirestothecontrol.

Replacethefrontcoverofthesensorenclosure.

•



-------------------------------------------------------------------------------------

Wires from outdoor

sensor to control’s

outdoor sensor and

sensor common

terminals

Sensor is built into

the enclosure



---------------------------------------------------------------------------------



Thesesensorsaredesignedtomountonapipeorinatemperature

immersionwell.

TheUniversalSensorshouldbeplaceddownstreamofapumporafter

anelboworsimilarfitting.Thisisespeciallyimportantiflargediameter

pipesareusedasthethermalstratificationwithinthepipecanresultin

erroneoussensorreadings.Propersensorlocationrequiresthatthefluid

isthoroughlymixedwithinthepipebeforeitreachesthesensor.



TheUniversalSensorcanbestrappeddirectlytothepipeusingthe

cabletieprovided.Insulationshouldbeplacedaroundthesensorto

reducetheeffectofaircurrentsonthesensormeasurement.

IOM-WR-Snow_Melting_Control-654328 8of56

Agoodqualitytestmetercapableofmeasuringupto5,000

kΩ(kΩ=000Ω)isrequiredtomeasurethesensor

resistance.Inadditiontothis,theactualtemperaturemust

bemeasuredwitheitheragoodqualitydigitalthermometer,

orifathermometerisnotavailable,asecondsensorcan

beplacedalongsidetheonetobetestedandthereadings

compared.

Firstmeasurethetemperatureusingthethermometerand

thenmeasuretheresistanceofthesensoratthecontrol.The

wiresfromthesensormustnotbeconnectedtothecontrol

whilethetestisperformed.Usingthechartbelow,estimate

thetemperaturemeasuredbythesensor.Thesensorand

thermometerreadingsshouldbeclose.Ifthetestmeterreads

averyhighresistance,theremaybeabrokenwire,apoor

wiringconnectionoradefectivesensor.Iftheresistanceis

verylow,thewiringmaybeshorted,theremaybemoisture

inthesensororthesensormaybedefective.Totestfor

adefectivesensor,measuretheresistancedirectlyatthe

sensorlocation.

       

       

-50 -46 490,83 20 -7 46,28 90 32 7,334 60 7 ,689

-45 -43 405,70 25 -4 39,93 95 35 6,532 65 74 ,538

-40 -40 336,606 30 - 34,558 00 38 5,828 70 77 ,403

-35 -37 280,279 35 2 29,996 05 4 5,20 75 79 ,28

-30 -34 234,96 40 4 26,099 0 43 4,665 80 82 ,72

-25 -32 96,358 45 7 22,763 5 46 4,84 85 85 ,073

-20 -29 65,80 50 0 9,900 20 49 3,760 90 88 983

-5 -26 39,403 55 3 7,436 25 52 3,383 95 9 903

-0 -23 8,08 60 6 5,3 30 54 3,050 200 93 829

-5 -2 00,22 65 8 3,474 35 57 2,754 205 96 763

0 -8 85,362 70 2 ,883 40 60 2,490 20 99 703

5 -5 72,98 75 24 0,50 45 63 2,255 25 02 648

0 -2 62,465 80 27 9,299 50 66 2,045 220 04 598

5 -9 53,658 85 29 8,250 55 68 ,857 225 07 553

SensorWell

Universal

Sensor



IfaUniversalSensorismountedonto"(25mm)diameterLtypecopperpipe,there

isapproximatelyan8seconddelaybetweenasuddenchangeinwatertemperature

andthetimethesensormeasuresthetemperaturechange.Thisdelayincreases

considerablywhenmildsteel(blackiron)pipeisused.Ingeneral,itisrecommended

thatatemperaturewellbeusedforsteelpipeofdiametergreaterthan-/4"(32mm).

Temperaturewellsarealsorecommendedwhenlargediameterpipesareusedandfluid

stratificationispresent.



---------------------------------------------------------------------------------------------

. Removethefrontcoverfromthecontrol.

2. Useanelectricaltestmetertomeasure(ac)voltagebetweentheRandCterminals.Thereadingshouldbe24V(ac)

+/–0%.

3. Installthefrontcover.



---------------------------

ThecontrolincludesanOverridemenutocheckifthecontrol’s

relaysareoperatingandthatthecontroliswiredcorrectlyto

thesnowmeltingequipment.

Step:

PressandholdtheHomebuttonfor3seconds.

Step2:

PressNEXTtonavigatetotheOverridemenu.

Step3:

PressENTERtoentertheOverridemenu.

Step4:

SelectManualOverridetoHand.

Step5:

Forhydronicsystems,setSystemPumptoOn.The

systempumpshouldnowbeoperating.

Step6:

SetHeatRelaytoOn.Theboilerorelectricheatingcables

shouldstartheating.

Step7:

FormodulatingboilerschangetheBoilerPercentfrom

0to00%.Theboilershouldbefiring.

Step8:

Foramixingvalveormixinginjectionpump,changethe

MixPercentfrom0to00%.Themixingvalveshouldopen

orthemixinginjectionpumpshouldincreasespeed.

Step9:

SelecttheOverrideTimeafterwhichthecontrolresumes

normaloperation.

Step0:

ExittheManualOverridebyselectingAuto.









Inhydronic application modes,thecontrol includesa

MaximumHeatoperationwherethecontroloperatesthe

snowmeltingsystemtomaintainthemaximumallowed

heatingsetpoints.Thisallowstestingofthesnowmelting

systemduringwarmweather.

Step:

PressandholdtheHomebuttonfor3seconds.

Step2:

PressNEXTtonavigatetotheOverridemenu.

Step3:

PressENTERtoentertheOverridemenu.

Step4:

SelectManualOverridetoMax.

Step5:

SelecttheMaximumHeatTimeafterwhichthecontrol

resumesnormaloperation.

Step6:

ExittheManualOverridebyselectingAuto.

Whenoperatingahydronicsnowmeltingsystem,itisnecessary

topurgeandbleedallairoutofthesystem.Thecontrolincludes

aPurgeoperationwheretheSystemPumpaswellaspumps

operatedbythetekmarNet

systemareallturnedontoassist

inpurgingairfromthesystem.

Step:

PressandholdtheHomebuttonfor3seconds.

Step2:

PressNEXTtonavigatetotheOverridemenu.

Step3:

PressENTERtoentertheOverridemenu.

Step4:

SelectManualOverridetoPurge.

Step5:

SelecttheMaximumPurgeTimeafterwhichthecontrol

resumesnormaloperation.

Step6:

ExittheManualOverridebyselectingAuto.

Thesnowmeltingsystemcanbemanuallyturnedoffandthe

controlremainsoffuntilmanuallychangedbacktoAuto.This

allowstheinstallerorendusertopermanentlydisablethesnow

meltingsystemwithoutremovingpowerfromthecontrol.

Step:

PressandholdtheHomebuttonfor3seconds.

Step2:

PressNEXTtonavigatetotheOverridemenu.

Step3:

PressENTERtoentertheOverridemenu.

Step4:

SelectManualOverridetoOff.

Step5:

ExittheManualOverridebyselectingAuto.

Whenoperatinganelectricsnowmeltingsystem,thecontrol

includesaTestoperationwheretheelectricalheatingcables

canbeenergizedfor0minutesafterwhichthecontrolresumes

normaloperation.Thisallowstestingoftheelectricsnowmelting

systemduringwarmweather.

Step:

PressandholdtheHomebuttonfor3seconds.

Step2:

PressNEXTtonavigatetotheOverridemenu.

Step3:

PressENTERtoentertheOverridemenu.

Step4:

SelectManualOverridetoTest.

Step5:

ExittheManualOverridebyselectingAuto.













Thecontrolislocallylockedandtheaccesslevelcannotbechanged.

SettoLockwheninstallationhasbeencompleted.

OFF



Thecontrolisunlockedandtheaccesslevelmaybechanged.Goto

theToolboxmenutochangetheaccesslevel.SettoUnlockduring

theinstallationprocess.

ForsystemsthatincludeatekmarNet

systemcontrol:Setthe

tekmarNet

systemcontroltounlocktoallowaccessleveladjustment

onallconnecteddevices.

Notused

OFF

Notused

Meets Class B: ICES & FCC Part 15

Power: 24 V (ac) ±10%, 60 Hz, Class 2,

16 VA standby, 100 VA fully loaded

Relays: 24 V (ac) 2 A, 3.5 A combined

1058-04

Switch

Settings

www.WattsRadiant.com

Order #81016552

Designed and assembled in Canada

Lock

Unused

Unlock



H1226A

Snow Melting Control 654

BackofControl









IOM-WR-Snow_Melting_Control-654328 20of56







ENTER

HomeButton

ReturntotheHomeScreen

Pressandholdfor3

secondstoaccessthe

programmingmenus.

Touchtogotothenextsetting

Touchtoquicklyenter

theViewmenu

Touchtoadjustsettings

OperationField

StatusField

Touchtodisplay

RunTime,

Outdoor&Slab

Temperature

Touchto

MeltorStop

Touchtoturnsystem

offwhileaway

MELT Systemismeltingsnoworice.

IDLE Systemisidling.

STRM Systemisinstormoperation.

OFF Systemisoff.

WWSD

WarmWeatherShutDown.Theslabisnaturally

warmenoughtomeltsnoworice.

CWCO ColdWeatherCutOut.Toocoldtomelt.

TIMED

Timedmeltingoperation.Systemoperatesuntil

timehaselapsed.

WARM Slabiswarminguptothemeltingtemperature.

AWAY

Awayscene.Nomeltinguntiltheawaysceneis

exited.

PEND

Pending.Thesystemhasdetectedwaterbutitistoo

coldtooperateorthescheduleisinIdleorOff.

WAIT

Zonepriorityineffect.Zonemustwaituntilhigher

priorityzonefinishesmelting.

SENSOR Tandem090sensor.

TRACK

Thiszonetracksthemeltingoperationofzone.











Heatisturnedon.





Communicationispresent.



Indicatesanerrorispresent.



Adjustthedisplayedsetting.

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Watts 300154 Installation guide

Brand: Watts

Model: 300154

Category: Thermostats

Type: Installation guide

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Watts 300154 Installation guide

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Watts 300154 Installation guide

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