Install Instructions

65
CAUTION
PUSHING AND HOLDING THE “+” WHILE IN STANDBY MODE WILL PREVENT THE
BOILER FROM RESPONDING TO A CALL FOR HEAT. PUSHING AND HOLDING THE
“-” WHILE IN STANDBY MODE WILL PREVENT THE BOILER FROM RESPONDING
TO A CALL FOR DOMESTIC WATER. IF THIS HAPPENS, “cOFF” or “dOFF” WILL
APPEAR ON THE DISPLAY. TO TURN BACK ON THE HEATING FUNCTION, PRESS
AND HOLD “+” UNTIL “c” AND THE SET POINT TEMPERATURE APPEARS ON
THE DISPLAY. TO TURN BACK ON THE DOMESTIC WATER FUNCTION, PRESS
AND HOLD “-” UNTIL “d” AND THE SET POINT TEMPERATURE APPEARS ON
THE DISPLAY. AFTER PRESSING ANY KEYS, AND BEFORE LEAVING THE
INSTALLATION, VERIFY THAT THE BOILER FIRES IN RESPONSE TO A CALL FOR
HEAT AND DOMESTIC WATER.
 Instandbymode,itispossibletoviewboththeheatingsupplysetpointtemperatureandthe“domestichotwater
referencesetpoint”.The“domestichotwaterreferencesetpoint”plus45°Fequalstheboilersupplysetpointwhenitis
respondingtoacallfromtheindirectwaterzone.Itisnottheactualdomestichotwatersetpoint.TheFCMisdesigned
forusewithastoragetypeindirectwaterheatersuchastheAlliance.Thedomesticwatersetpointiscontrolledbythe
thermostatontheindirectwaterheater.The“defaultdomesticwaterreferencesetpoint”is135°Fandtargetboilersupply
temperaturewhenrespondingtoacallfromtheindirectwaterheateristherefore180°F(135°F+45°F).Thedefault
heatingsupplysetpoint(parameter4)is180°F.
 Instandbymodeitisalsopossibletoturnonoroffeithertheheatingordomesticwaterzone.Thereisnormallyno 
reasontoturnoffeitherofthesezonesanddoingsoisnotrecommended.
 Instandbymode,if“Mode”andeither“+”or“-“aresimultaneouslypushedandheldforatleast2seconds,the
burnercanbeforcedintoeitherhighorlowre.Thisfeatureisusedforrunningcombustiontests.After15minutes,
theburnerwillautomaticallyreverttomodulation.Ifitisdesiredtoreverttomodulationbefore15minuteshaspassed,
simultaneouslypushing“+”and“-“willrestoremodulation.
 InParametermodebothsetpointscanbechangedandbothzonesturnedonoroff.Inaddition,bothzonescanbe
conguredforcontinuouspumpoperation.Iftheheatingzoneissetforcontinuouspumpoperation(parameter3setto
3),theheatingpumpwillstillshutdownwhenthereisacallfordomestichotwater.
 Ifeithertheheatingsupplysetpoint(parameter4),ortheDHWreferencesetpoint(parameter1)aresetabovetheir
factorysetvalues,theboilersupplytemperaturewillexceed180°Fandthereisapossibilitythatthesafetytemperature
limitwillopen.Ifthishappens,theboilerwillshutdownanda“b26”errorwillappearonthedisplay.Theboiler
willresumenormaloperationwithoutmanualinterventionwhenthesafetylimitcloses(thisbehavioriscommonon
conventionalboilers).
 Informationmodeisusedtoviewvarioustemperaturesandsettingsbutcannotbeusedtochangeparametersor
otherwisecontroltheboiler.TheinformationavailableisshowninFigure12.2andislargelyself-explanatory.Thedigit
totheleftofthedecimalpointistheStepnumberandthedigitstotherightarethecorrespondingtemperature.
 Ininformationmode,the“supplywatertemperaturesetpoint”(Step6),isthesupplytemperaturesetpointforthezone
towhichtheboileriscurrentlyresponding(eitherheatorDHW).Ifanoutdoorsensorisconnectedtotheboiler,and
theboilerisrespondingtoacallforheat,thisvaluewillbethecurrentpointontheresetcurve.Whennocallforheator
DHWispresent,Step6showstheheatingsupplysetpoint.
 Insomecasesa“-22”willappearinInformationModeforaparticularreading.Thismeansthatthereadingisnot
applicable.Forexample,“-22”willappearfortheoutdoortemperature(Step4)ifnooutdoorsensorisconnectedtothe
boiler.