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Besuretokeepfireplacedampersclosedwhennotinuse.Theyprovidean
excellentescaperouteforheat,aswellashumidity.
Onoccasion,indoormoistureproducingactivitiessuchasclothesdrying,
cooking,showers,etc.,mayraisetheRHlevelhigherthanitshouldbe,even
thoughtheAprilairehumidifierisnotoperating.Telltaleindicationsare
condensationorfrostoncoldsurfacessuchaswindows,doors,walls,etc.If
suchcondensationpersistsforseveralhours,yourhomeshouldbeventilated
todissipatethepotentiallydamagingexcessmoisture.
Yourhumidifierisdesignedtooperateusinghot,cold,hardormechanically
softenedwater.(HotwaterisrequiredforModels350and360.)
Watercontainsvaryingamountsofminerals.Theresidueremainingasa
resultof hardwaterevaporationisprimarilycalciumandmagnesium
componentsandisusuallyquitehard,scaly,anddense.
Residuefromsoftenedwatertendstobesoftandfluffyandhasagreater
volumethanhardwaterdeposits.Ineithercase,theservicelifeofaWater
Panelevaporatorwillbethesame.TheWaterPanelevaporatorshouldbe
changedatleastonceayearwiththeexceptionofModels400Aand
400Mwhichshouldbechangedatleasttwiceaheatingseason.Inthe
drain-equippedmodels,mostofthemineralsolidsarecontrolledby
flushingthemdownthedrain.
Hotsupplywater,140°Fmaximum,is recommendedwithdraintype
humidifiersforincreasingcapacityandisrequiredforheatpumpandair
handlerapplications.
Forbestperformance,we recommendthat you replace the Water
Panel evaporatorinyourAprilaire humidifierat leastannually with
the exceptionof Models 400Aand 400Mwhich shouldbe changed
at leasttwice perheatingseason.
The"ChangeWaterPanel"indicatorlight(AutomaticControlonly)will blink
whenitistimetochangeyourWaterPanel.Seeindividualmodelinstructions
foradditionalmaintenance.
To
o
o
o
o
purchasea newWater Panel:
CalltheinstallerofyourAprilairehumidifier.
Thisinformationis oftenfoundonyourequipment.
Callyourheatingandair conditioningdealer.
Useour"DealerLocator"at: www.aprilaire.com
Lookin theYellow PagesunderHumidifyingApparatusor
Heating& Air ConditionerContractors.
If noneofthe aboveissuccessfulandyoustill needinformation,
pleasefeelfreetowrite us.
• PurchaseonlyGenuineAprilaireWaterPanelsto maintainperformance.
If yourhumidifieris equippedwith an AutomaticHumidifierControlwith
Water Panelchangeindicator,after replacingthe Water Panel,turn the
controlknobtothe"Test/Reset"positionuntilthe"HumidifierOn"lightblinks
to resetits timer.(Blowermustbe operatingandHVACcallingfor heat.)Be
suretoturnthecontrolknobbackto it'soriginalsetting.If the"HumidifierOn"
lightcontinuestoblink,yourhumidifierisinTestmode.DONOTLEAVETHE
CONTROLIN TESTMODEORHUMIDIFIERWILL NOTOPERATE.
VVARNING
-10- -11-
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