User Guide

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
R Rh 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
R Rh W1 S1 Com
No Power
LN
Pump
Floor
Sensor079
