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
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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.
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 ------------------------------------------------
 -------------------------------------------------
8AWGLVTSolidWire
(LowVoltageConnections)
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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.
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

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.
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









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.
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

 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
 ---------------------------------------------------------
C
518 RRh W1 S1 Com
No Power
C
519 RRh W1 S1 Com
No Power
Zone
Valve
24V(ac)
Transformer
L N
RC
Floor
Sensor079
Installfield
jumperwire
RtoRh


 9of6 ©203WattsRadiant
 --------------------------------------------------------------
C
518 RRh W1 S1 Com
No Power
RC








C
519 RRh W1 S1 Com
No Power
L
NG
5V(ac)
Floor
Sensor079
Relay
Transformer
Installfield
jumperwire
RtoRh
 ---------------------------------

     
















































C
518 RRh W1 S1 Com
No Power
C
519 Rh W1 S1 Com
No Power
R





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.
 ----------------------------------------------------
C
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
C
519 RRh W1 S1 Com
No Power
LN
Pump
Floor
Sensor079
