Watts Radiant 519 User manual



 of6 ©203WattsRadiant



TheRadiantThermostat59accurately

controlstheroomand/orfloortemperature

forahydronicheatingzoneusingPulse

WidthModulation(PWM)technology.

Simpleupanddownbuttonsandadisplay

withlargetypemakethisthermostateasy

toreadanduse.AFloorSensor079is

includedtomeasurefloortemperature

toprotectthefloorfromoverheatingand

enhancecomfort.

 

AutoHeatingCycle•



RadiantFloorHeating

PulseWidthModulation

Floor&AirTemperatureControl

Outdoor&FloorTemperature

Display

Backlight

FreezeProtection

IncludesFloorSensor079

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IOM-WR-Radiant_Thermostat-59324 2of6

ReadthisManualBEFOREusingthisequipment.

Failuretoreadandfollowallsafetyanduseinformationcanresultin

personalinjury,propertydamage,ordamagetotheequipment.

KeepthisManualforfuturereference.

Itisyourresponsibilitytoensurethatthiscontrolissafelyinstalledaccordingtoall

applicablecodesandstandards.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.WattsRadiantisnotresponsiblefordamages

resultingfromimproperinstallationand/ormaintenance.

Installation...........................................3

Preparation.....................................3

RemovingTheThermostatBase....3

MountingTheThermostat...............4

FloorSensor079Installation..........5

FloorSensor079Wiring.................6

FloorSensor079Testing................7

Temperaturevs.ResistanceTable....7

ThermostatWiring..........................8

TestingtheThermostatWiring......0

UserInterface.................................... 

HomeScreen................................

SymbolsDescription.....................

SequenceofOperation......................2

HeatingOperation.........................2

ProgrammableSettings.....................3

Troubleshooting.................................4

ErrorMessages............................4

FrequentlyAskedQuestions........5

TechnicalData..............................5

LimitedWarrantyandProduct

ReturnProcedure.........................6





Congratulationsonthepurchaseofyournewthermostat.

Thismanualwillstepthroughthecompleteinstallation,programmingandsequence

ofoperationforthiscontrol.Attheback,therearetipsforcontrolandsystem

troubleshooting.

 3of6 ©203WattsRadiant



Jewellerscrewdriver

Phillipsheadscrewdriver

•

WireStripper•



-----------------------------------------------------



Choosetheplacementofthethermostatsearlyintheconstructionprocesstoenable

properwiringduringrough-in.

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32-22°F(0-50°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4conductor,8AWGwire.

•



------------------------------------------------



-------------------------------------------------

8AWGLVTSolidWire

(LowVoltageConnections)

•

Toremovethethermostatbase:

Locatethetabonthebottomofthethermostat.

Pushthetabwitheitheryourthumborwithascrewdriver.

Liftthethermostatfrontawayfromthethermostat’sbase.

•



IOM-WR-Radiant_Thermostat-59324 4of6











Ifmountingdirectlytothewall:

Drillholesandinstallthewallanchors.

Feedthewiringthroughthelargeholeinthethermostatbase.

Fastenthethermostatbasetothewallusingthewoodscrewstothewallanchors.

Terminatewiringtothewiringstrip.

Pushthethermostatfrontontothethermostatbase.

•





















Ifasinglegangboxisused:

AdapterPlateisrequired(soldseparately).

Feedthewiringthroughtheholeintheadaptorplateandthethermostatbase.

Fastentheadaptorplatetothegangbox.

Fastenthebaseofthethermostattotheadaptorplate.

Terminatewiringtothewiringstrip.

Pushthethermostatfrontontothethermostatbase.

•



 5of6 ©203WattsRadiant



Ifathickfloorcoveringistobeinstalleddirectlytothesubfloor,agroove/8"(4mm)wide

by/6"(2mm)deepcanbecutintothebackoftheflooringmaterialtoaccommodate

thewireforthesensor.Ensurethatthesensorislocatedinsuchapositionthatthe

attachedwireisabletoreachtoasuitablejunctionlocation.

Splicesunderthefloorcoveringshouldbeavoided

toensuretroublefreeoperation.Agroove3/6"

(5mm)wideby3/6"(5mm)deepby-3/4"(45

mm)longshouldbecuttoaccommodatethe

sensor.Thesensorshouldbelocatedmidway

betweentheheatingelementstoensureaproper

temperaturereading.



Ifthefloorcoveringistobeinstalledovereitherathin-setorthin-pourmaterialof

sufficientdepth,thefloorsensorcanbeplaceddirectlyintoeitherthethin-setmaterial

orthethin-pourmaterialandcoveredover.

Ensurethatthesensorislocatedinsucha

positionthattheattachedwireisabletoreach

toasuitablejunctionlocation.Spliceswithinthe

thin-setorthin-pourshouldbeavoidedtoensure

troublefreeoperation.Thesensorshouldbe

locatedmidwaybetweentheheatingelements

toensureapropertemperaturereading.











Ifathinfloorcoveringistobeinstalleddirectlytothesubfloor,agroove/8”(4mm)

wideby/6”(2mm)deepcanbecutintothesurfaceofthesubfloortoaccommodate

thewireforthesensor.Ensurethatthesensoris

locatedinsuchapositionthattheattachedwire

isabletoreachtoasuitablejunctionlocation.

Splicesunderthefloorcoveringshouldbeavoided

toensuretroublefreeoperation.Agroove3/6"

(5mm)wideby3/6"(5mm)deepby-3/4"

(45mm)longshouldbecuttoaccommodate

thesensor.Thesensorshouldbelocatedmid

waybetweentheheatingelementstoensure

apropertemperaturereading.











---------------------------------------------------



Ifitisnotpracticaltocutagrooveinthesurfacecovering,followtheinstallation

methodusedforthinfloorcoverings.

IOM-WR-Radiant_Thermostat-59324 6of6



Ifthesensoristobeinstalledtothebottomofasubfloor,cutapieceof"(25mm)

thickrigidinsulationintoa6"(50mm)by6"

(50mm)square.Agroove3/6"(5mm)wideby

3/6"(5mm)deepby-3/4"(45mm)longshould

becutintotheinsulationtoaccommodatethe

sensor.Placethesensorinthegrooveand

sandwichthesensorbetweentheinsulationand

thesubfloor.Useasuitablefasteningmethodto

affixtheinsulationtothesubfloor.





IfaFloorSensor079istobeinstalledintoanexistingtilefloorwithsufficientlylarge

groutlines,thesensorandwirecanbeinstalledinoneofthegroutlinesbetweenthe

tiles.Selectalowtrafficareaofthefloorthatis

midwaybetweentheheatingelementsforthe

sensorlocation.Ensurethatthesensorislocated

insuchapositionthattheattachedwireisable

toreachtoasuitablejunctionlocation.Splices

withinthegroutshouldbeavoidedtoensure

troublefreeoperation.Removetheappropriate

groutlineandplacethesensorandwireinthe

floor.Re-groutthearea.









------------------------------------------------

TheFloorSensor079issuppliedwith0'(3m)ofcable.Ifalongerlengthis

required,24AWGorlargerwirecanbesplicedontothetwowiresfromthesensor.

Thesplicesshouldbeproperlysolderedandprotectedinanaccessiblejunction

box.Followthesensortestinginstructionsgiveninthisbrochureandthenconnect

thewirestothecontrol.



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

arelocatedinanareawithstrongsourcesofelectromagneticinterference,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.

 7of6 ©203WattsRadiant



Agoodqualitytestmetercapableofmeasuringupto5,000kΩ(kΩ=000Ω)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floortemperatureusingthethermometer.DisconnecttheSand

Comwiresfromthethermostat.Usinganelectricalmeter,measuretheresistance

oftheSandComwiresatthethermostatlocation.Usingthetemperatureversus

resistancetable,estimatethetemperaturemeasuredbythesensor.Thesensor

measurement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.Oncethetesthas

beencompleted,reconnecttheSandComwirestothethermostat.



 

 

-50 -46 490,83

-45 -43 405,70

-40 -40 336,606

-35 -37 280,279

-30 -34 234,96

-25 -32 96,358

-20 -29 65,80

-5 -26 39,402

-0 -23 8,08

-5 -2 00,22

0 -8 85,362

5 -5 72,98

0 -2 62,465

5 -9 53,658

20 -7 46,28

25 -4 39,93

30 - 34,558

 

 

35 2 29,996

40 4 26,099

45 7 22,763

50 0 9,900

55 3 7,436

60 6 5,3

65 8 3,474

70 2 ,883

75 24 0,50

80 27 9,299

85 29 8,250

90 32 7,334

95 35 6,532

00 38 5,828

05 4 5,20

0 43 4,665

5 46 4,84

Donotapplyvoltagetoasensoratanytimeasdamagetothesensormayresult.

IOM-WR-Radiant_Thermostat-59324 8of6

 

 

20 49 3,760

25 52 3,383

30 54 3,050

35 57 2,754

40 60 2,490

45 63 2,255

50 66 2,045

55 68 ,857

60 7 ,689

65 74 ,538

70 77 ,403

 

 

75 79 ,28

80 82 ,72

85 85 ,073

90 88 983

95 9 903

200 93 829

205 96 763

20 99 703

25 02 648

220 04 598

225 07 553

Continued



---------------------------------------------------------

518 RRh W1 S1 Com

No Power

519 RRh W1 S1 Com

No Power

Zone

Valve

24V(ac)

Transformer

L N

Floor

Sensor079

Installfield

jumperwire

RtoRh



 9of6 ©203WattsRadiant



--------------------------------------------------------------

518 RRh W1 S1 Com

No Power

















519 RRh W1 S1 Com

No Power

5V(ac)

Floor

Sensor079

Relay

Transformer

Installfield

jumperwire

RtoRh



---------------------------------



     

































































































518 RRh W1 S1 Com

No Power

519 Rh W1 S1 Com

No Power











24V(ac)

Power

Floor

Sensor079

24-VoltMasterZoneControl

Modulefor4VoltActuators

Order:8006626

24V(ac)

ValveActuator

Installfield

jumperwire

RtoRh

IOM-WR-Radiant_Thermostat-59324 0of6



--------------------------------------------------

Ifthethermostatdisplayturnson,thisindicatesthatthethermostatisoperatingcorrectly

andtherearenoelectricalissues.Intheeventthatthedisplayispermanentlyoff:

.Removethethermostatfront.

2.UseanelectricalmetertomeasurevoltagebetweentheRandCwiring

terminals.ForACpowersuppliesthevoltageshouldmeasurebetween0to

30V(ac).ForDCpowersuppliesthevoltageshouldmeasurebetween0to

30V(dc).

3.IfthevoltageontheRandCwireterminationsiscontinuousandthe

thermostatdisplayisnoton,thethermostatmayhaveafault.Contactyour

WattsRadiantsalesrepresentativeforassistance.

Ifthethermostatdisplayinitiallypowersonbutlatershutsoffintermittently,there

maybeashortcircuitfromtheWwiretoground,orthepowersupplyistoosmall

topowertheload.



---------------------------------

.Touchthe



buttonandsettheheatingtemperatureabovethecurrentroom

temperature.Makesurethedisplaydoesnotflash“Max”ifusingafloor

sensor.

2.Whenthe“HeatOn”symbolappearsonthedisplay,useanelectricalmeter

tocheckforvoltageontheWandCwiresconnectedtothezonevalve,

wiringcenter,relayorswitchingrelay.Theelectricalmetershouldread0to

30V(ac)or(dc).

3.IftheWandCwirehavevoltage,checkthezonevalve,wiringcenter,relay

orpumptodetermineiftheheatdeviceisoperatingcorrectly.



----------------------------------------------------

518 RRh W1 S1 Com

No Power

R W

24 V

R W

H NX X H N H N N H

Com Switching Relay

Zone 1 Zone 2 Zone 3

Class2

Transformer

R W

Zone 1 Zone 2 Zone 3

519 RRh W1 S1 Com

No Power

Pump

Floor

Sensor079



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