Carrier HUMXXSTM3034 Installation and operating instructions

Residential Steam Humidifier
Installation & aintenance Instructions
Safety Cautions.......................................... 2
Materials List........................................... 2
Principles of Operation................................... 3
Sequenceof Operation................................... 4
Specifications & Dimensions............................. 4
InstallationInstructions.................................. 6
Choosinga Location..................................... 6
- DispersionTube...................................... 6
- Humidifier.......................................... g
PrepareHumidifierfor Mounting.......................... 10
InstallSteamDispersionTube............................ 10
MountHumidifier...................................... 10
InstallSteamHose..................................... 10
SupplyWater.......................................... 10
ControlWiring......................................... 11
DrainLine............................................. 12
ElectricalPowerWiring& Shut-offSwitch.................. 12
Start-up Procedure ..................................... 17
Operating Modes....................................... 17
Shut Down Procedure................................... 18
Display Panel .......................................... 18
Maintenance........................................... lg
CheckingSystem Operation & Troubleshooting............ 20
ReplacementParts...................................... 23
iREAD AND SAVE THESE iNSTRUCTiONS 1

,_ CAUTIONS& WARNINGS
Humidifier
ManualHumidifierControl
Dispersiontube
Steamhose(6feet)
BlowerActivationRelay
7/8" I.D.draintubing(10feet)
Hoseclamps
Saddlevalve
Mountingscrews
Mainpowerdisconnectswitch
Wiring
1/4" O.D.supplywatertubing
Boardsfor mounting(ifrequired)

TheCanisterSteamHumidifierdelivershumidityintheform
ofsteamtotheconditionedspaceviatheHVACsystemduct.
Thehumidifiergeneratessteambyenergizingtwoelectrodes
thatextendintoacanisterofwater.Currentflowingbetween
theelectrodescausesthewatertoboil,creatingsteam.
Waterisintroducedtothehumidifierthroughafillvalveto
afillcuplocatedinthetopofthecabinet.Thefillcupserves
asanoverflowreservoirandprovidesanairgapbetweenthe
humidifierandwatersource.Thesteamcanisterisfilledfrom
thebottom.Thecanisterisseatedinadraincupassembly
whichincludesadrainvalve.Thedrainandfillvalveswork
togethertomaintainwaterlevelinthecanistertodeliver
theratedsteamcapacitybasedontheelectricalconductivity
ofthewaterandtotemperdrainwater.SeeFigure1for
representationoffillanddrainsystemandcanister.
Steamisdeliveredintotheairstreamthroughadispersion
tubemountedintheHVACsystemductwork.Openingsinthe
dispersiontubearefittedwith"Tubelets'M''whichextendinto
thecenterofthetube.Thedesignofthe dispersiontubeand
tubeletsdistributesteamoverawide areain theductand
directanycondensedmoisturebackintothesteamhose.
Mineralsthat arenaturallyfoundinwater causethewaterto
Steam
Outlet
Fill Cup_ ' - Overflow
F High Water
J LevelSensor
Electrodes
Flow Control
Orifice
Canister
Inlet
FillValve DrainValve
Drain Cup
Supply
Water
beelectricallyconductive.Waterconductivityis measuredin Drain
microSiemenspercentimeter(uS/cm).Mineralcontent,also go_52_
describedas"water hardness"isusuallymeasuredin grainspergallon.Becauseofthevarietyof mineralsthat arefoundinwater,thereis no
directcorrelationbetweenwater hardnessandconductivity,butgenerallythe higherthemineralcontent,thehighertheconductivity.
TheCanisterSteamHumidifierisdesignedtooperateonwaterwith conductivitybetween125and1,250uS/cm.Thiscorrelateslooselywith
waterwith hardnessbetween3 and36 grains/gallon.Waterthat isconsidered"hard"andalsosoftenedwaterworkwell inthe humidifier.The
humidifierwill makesteamwhenplumbedto low-conductivitywater butit takeslongertoreachnominalcapacity.
With low conductivitywater, it maytake the humidifierone week or moreof operationto reachratedcapacity,especially if it
is wired to operateon120volts. Whenoperatingon240volts,the humidifierusuallywill reach nominalcapacitywithin a few
hours,evenwith lower conductivitywater.
Aswater in thecanisterboilsandturnsintosteam,mineralsareleft behind.Mineralsremainingin solutionincreasetheconductivityof the
water.Mineralsalsodepositontothesubmergedportionsof theelectrodesrenderingthoseareasineffective.Asthis occurs,the levelofwater
in thecanisterrisesto exposeuncoatedelectrodesurface.
Therearebenefitsandtrade-offsto considerwhentheapplicationallowsa choicebetweenhardandsoftenedwater:
Hardwater: Thebenefitof hardwater is lessfrequentdrainingandfilling thanwith softwater,whichresultsin betterenergyandwater
efficiencyandmoreconsistentsteamoutput.However,canisterreplacementcouldbemorefrequentwith hardwater,becausehardwater scale
coatsthe electrodes.Theharderthewater,themorefrequenttheneedfora newcanister.
Softened water: Thebenefitof softenedwater is longercanisterlife (dependingonwater chemistry)thanwith hardwater,becausesoftened
waterdoesnotcoattheelectrodesnearlyasmuchashardwater.However,softenedwater ionsstayin solutiontomuchhigherconcentrations
thanhardwater ions.Thisrequiresmorefrequentdrainingandfilling,whichresultsin lessenergyandwater efficiencyandlessconsistent
steamoutput.

Conductivity(uS/era)
of water connectedto
humidifier
Estimatedgrains/gallon
(priorto anywater
softening)
Hardness(priortoany
water softening) Canisterbehavior Solution
Humidifierdoesnot Installationnot
0-125 0-3 NaturallySoft function, recommended.
Powerwith 240VAC,use
125-300 3-g NaturallySoft Longstartuptime. constantfanto decrease
timeto reachfull capacity.
SlightlyHard
ModeratelyHard
Hard
g-15
15-20
20-25
Optimalperformance
range.
300-500
600-640
64O-84O
Usehardor softened
wateL
Shortenedcanisterlife
840-1250 25-36 VeryHard dueto scalebuildup. Usesoftenedwater.
Canisterperformance Installationnot
above1250 36 ExtremelyHard degradesquickly, recommended.
Note:If softenedwater is notavailable,or if non-softenedwaterwill be usedin thehumidifier,usethis tableto estimatetheconductivityofthe
waterdeliveredto thehumidifier.Takethe appropriateactionsasnecessary.Usingsoftenedwater isgenerallyacceptableunlessthewater is
extremelyconductive.Theconductivityofsoftenedwater isusuallyslightlyhigherthanthe conductivityofthehardwater enteringthe softener.
Forsoftenedwater,usea conductivitytesttogetherwith thetableaboveif thereisa concernthat thewater maybe tooconductive.The
manufactureris notresponsibleforfailuresdueto misapplicationoftheproductusingwaterthat is unsuitableforthistechnology.
WhenthehumidifiercontroldetectsRHbelowtheset point,andprovidedthe humidifieristurnedonandthe HVACsystemblowerisoperating,
theinternalcontrollerin thehumidifierenergizesthe electrodesandmeasuresthe currentflowingthroughthewaterbetweenthem.The
controlleradjustswater levelin thecanisterviaafill valveanda drainvalveto maintaincurrentateither11.6or 16.0amps.Theoperatingwater
levelinthecanisterdependsonthemineralcontentofthewaterwhich determinesconductivity.
If thebloweractivationrelayisinstalled,thehumidifiercontrolwill turnontheHVACblowerwhena callforhumidityis made.
Amperage Voltage Maximumsteamcapacity(gai/day)
120V 11.5
11.5 208V 20.5
240V 23.3
120V 16.0
16.0 208V 30.0
240V 34.6
HumidifierShipping Weight:28 Ibs
HumidifierOperatingWeight:23 Ibs_
_Asmineralsprecipitateunitweightcanincreaseto approximately30 lb.

87/8"_
7/Fill Cup
53/4"
._ _ _"_
_ Dispersion OutletElectrical Knockouts
TOP VIEW
3"sq--
-_ _ 3" Mounting Plate
3/4" to first opening
_.0.4 1"
81/4"------_
-_- 2"sq
STEAMDISPERSIONTUBE
dia
101/8"_
207/8"
_----7 1/8"----_
o
Mounting
Holes
4"
FRONTVIEW SIDEVIEW BACKVIEW
o
!3/8" _1/I _
BOTTOMVIEW
Water Fill LineConnection
2"
90 1701

DiSPERSiONTUBE
Whenchoosinga locationforthedispersiontubethreethingsmustbeconsidered:Locationin duct,elevationwith respecttothehumidifier,and
distancefromhumidifiertodispersiontube.
DuctLocationandAbsorptionDistance
Thepreferredlocationforthedispersiontubeisin a supplyductbecausehighertemperatureairwill absorbmoisturemorereadily.The
dispersiontubemustbein astraightsectionofductfarenoughupstreamofanyobstructionor bendsintheductto allowthe steamtobefully
absorbed,preventingcondensationin theduct.Theexactdistancefromobstructionsin theductdependsonair temperature,RHsetpoint,and
airflowvelocityin theduct.Mostinstallationscanuseanabsorptiondistancebetween24and36 inches,howeverif thereareobstructionsin
theductworkuseTable3 to determinetheappropriateabsorptiondistance.Sizeabsorptiondistancebased on the lowesttemperature,
lowest air velocityand highesthumiditythatthesystem will see.Wheninstallingthehumidifierina systemwith variablespeedblower,
determineabsorptiondistancebasedonairflowat thelowestspeed.OperationduringACcallsisnotrecommendedbecauseofthepotentialfor
condensationintheductwork.If humidifieroperationis neededduringACoperation,makesureabsorptiondistanceisadequate.If absorption
distanceisinsufficient,configurecontrolsto lockouthumidifierduringtheACcallsandusethe bloweractivationfeatureto allowthehumidifier
to runwith thebloweronly.
Thedispersiontubemustbe mountedwith the plateona verticalsurfacewith thetubeangledupasshownin Figure3.Thesteamoutletsmust
faceupregardlessoftheairflowdirectionintheduct.Theplateis labeled"UP'to indicateproperorientation.Onhorizontalductrunsinstallthe
dispersiontubelowin theduct,onverticalrunscenterthetubeontheduct.
If thedispersiontubeismountedoninsulatedductwork,makesureinsulationisnotmorethan2" thickattubelocationto preventinsulation
fromblockingfirststeamoutlet.
Note: If two dispersiontubesareinstalledin oneduct,doublethedispersiondistances.Ifthreedispersiontubesareinstalled,triple the
dispersiondistance.Positiondispersiontubessoonedoesnotdischargedirectlyontoanother.
CAUTION

Humidifier 70°F& 30% RH 70°F& 45%RH G5°F& 45%RH 45°F&45%RH
Output(gai/day) AirflowVelocity* Setpoint Setpoint Setpoint Setpoint
300fpm 13" 19" 23" 30"
600fpm 6" 10" 12" 18"
Upto 16.0 1200fpm 3" 5" 6" 13"
1800fpm 2" 3" 4" 10"
300fpm 15" 23" 28" 45"
600fpm 6" 12" 13" 26"
20.5- 25.0 1200fpm 5" 6" 7" 19"
1800fpm 3" 4" 5" 16"
300fpm 24" 31" 36" 60"
600fpm 17" 22" 26" 48"
25.0- 35.0 1200fpm 12" 15" 18" 25"
1800fpm 10" 13" 15" 20"
_Velocityin feet perminute=Ductairflow volumein cubicfeetper minute/ductareain squarefeet.
Example:1,200cfmthrough16"x 12"duct=1,200/(12x 16/144sq.in./sqft.)= 1,200/1.333= %0 fpm

Elevation
Thepreferredlocationforthedispersiontubeishigherthanthe
humidifiersothatthesteamhosehasaconstantdownward
slopeofat least2" perfoot fromthedispersiontubetothe
humidifier.If hardpipeisused,theslopecanbe1/4" perfoot.
Withtheconstantdownwardslope,anycondensationthat
formsinthesteamhosewill drainbackintothesteamcanister.
SeeFigure3. Ifthedispersiontubemustbemountedbelow
thehumidifierorif thesteamhoseneedsto runupandover
anobstruction,a dripteewith draintrap,mustbeinstalledas
shownin Figure4.
CAUTION
Distancefrom Humidifierto DispersionTube
Thecapacityof thehumidifieris reducedbythelengthof
thesteamhoseor pipeduetocondensation.Themaximum
recommendedlengthofsteamhoseis6 feet. Usehardpipe
insulatedwith 1"fiberglassfor lengthsgreaterthan6feet.
Table4 provideshumidifiercapacitywith variouslengthsof
steamhoseandpipe.If 6-footsteamhosedoesnotreachfrom
humidifierto dispersiontube,splicein 1" copperpipeusing
%" x 1"reducingcouplingsasshownin Figure5.
Steam hose or pipe. _ Dis_
Insulate pipe with 1" fiberglass
to reduce steam loss. \ \
90° long sweep
or two 45° elbows Duct
*Pitch steam hose down from
dispersion tube to humidifier:
2"/ft (15%)minimum when
using steam hose.
1/4"/ftwhen using hard pipe.
g0 1704
Driptee installationfor
pipingoverobstruction,
or ifdispersiontube is
lower than humidifier.
90° long
sweep or two
45° elbows
90 1703
Insulate hard pipe to
reduce steam loss
To
Dispersion
Tube 6"min
8"rain
1"airgap -_
Open drain required,J I ]
see note 1. I I
R/I
\/
\/
\/
/\, I
// \\ !
Obstruction
Driptee
Draintrap
NOTES:
1.Referto governing codes for
drain pipe size and materials.
2.Support steam hose so there
are no sagsor low spots.
Steam
Hose or
Insulated
Pipe
Length
<2ft.
2 ft.
4 ft.
6 ft.
120VoIts
11.5Amps
Steam Insulated
Hose Pipe
11.5 11.5
11 11
10 11
9 11
16.0Amps 11.5Amps
Insulated
Pipe
20.5
2O
2O
2O
16.0Amps 11.5Amps
Insulated
Pipe
23.3
23
23
22
Steam
Hose
34.6
34
33
32
Steam Insulated
Hose Pipe
16.0 16.0
15.5 15.5
14.5 15.5
13.5 15
Steam
Hose
20.5
2O
19
18
208Volts
Steam Insulated
Hose Pipe
30.0 30.0
29 29.5
28 29.5
27 29
Steam
Hose
23.3
23
22
21
240Volts
16.0Amps
Insulated
Pipe
34.6
34
34
33

3/4" x 1" Reducing Coupling
Dispersion Tube
Steam Hose
1-1/2"HoseClamp
1"Copper Pipe
1-1/2" Hose Clamp
Steam Hose
Humidifier
901705
HUMiDiFiER
Donot mount humidifierin alocationwhere ambient
temperature exceeds104°Forwhere freezing temperatures
may occur. Extremetemperaturesmaycausethehumidifierto leak
whichcandamagefurnishingsorstructure.
Mounthumidifierina locationthat allowsaccessfor servicing,and
clearanceto removefront panelfor replacingthecanisterandside
panelforaccesstotheelectricalcomponentsduringinstallation.
SeeFigure6for minimumclearancesaroundhumidifier.
Thehumidifiershouldbemountedascloseto thedispersion
tubeaspossible.Table4 showshowcapacityis reducedasthe
distancebetweenthehumidifieranddispersiontubeincreases.If
thehumidifierismountedonthe ductdirectlybelowthedispersion
tube,allowspacefora bendin thesteamhose.Allow a minimum
of 2"of steamhoseto extendstraightoutofthe humidifierbefore
beginninganybends;thiswill helpensureatight connectionwith
thetopofthecanister.
Thehumidifiercanbe mountedto awoodsurface,orto sheetmetal
ductworkif it isstructurallystable.Donotmounthumidifierto fiber
ductboard.
Thehumidifiermustbemountedtoa verticalsurfaceandmustbe
mountedlevelin theuprightposition.
4"
FRONTViEW
16"for
Electrical
Access
16"
forDrain
16"for _ f/
Steam
Hose
30"for
Service
Access
SiDEViEW
90 1702

Unpackcarton.Openfrontpanelbyremovingscrewandlifting panelupandawayfromhumidifier.Disconnectthreewiresfromtopofcanister
bypullingstraightup.Thetwo largewires aretheelectrodeconductors.Thesmallerwire is connectedtothehighwater levelsensor.Remove
canisterbypullingit upandoutofdrainassembly.Removetwo screwsonrightsideof humidifierandlift sidepaneloff housingto expose
electricalcompartment.
Makesuresteamdispersiontubeis mountedhigherthanthe humidifiersothat condensatethat formsin thetuberunsbackintothecanister.
If thedispersiontubecannotbemountedhigherthanthehumidifierorif thesteamhosemustextendupfromthe humidifierthendownto the
dispersiontubedueto anobstruction,a dripteeanddraintrapsystemmustbe installedasshownin Figure4.
Drilla 1-1/4"diameterholeina verticalsurfaceof theductatthelocationchosenforthe dispersiontube.Positionthetubesoit is angledup,
regardlessofairflow direction.Securewith foursheetmetalscrewsprovided.
Securehumidifierto sturdywall usingscrewsprovided,orto sheetmetalduct.Humidifierweighs23 Ibs.with full canister.Makesuremounting
systemwill supportweight.If mountingto studframewall, installtwo spannerboardsto studsandfastenhumidifierto spannerboards.Make
surehumidifierismountedplumb.
Sixfeet of steamhoseisprovidedwith thehumidifier.Ifthesteamhosemustbecut,useahacksaw.If additionallengthisrequired,use
1" O.D.metalorcopperpipe.DonotusePVCpipe for steamline. Insulatepipewith 1" thickfiberglassto reducesteamloss.SeeTable4 for
humidifiercapacityatvariouslengthsofsteamhoseandpipe.
Usethesteamhoseprovided.Otherhosesmayhaveimpuritieswhichcancausefoamingin thecanister.Foamingcancausewater level
inaccuraciesandreducedsteamproduction.Whenusingpipe,removeall tracesof residualmaterialsusedto connectthepipeto preventfoaming.
Verifythatthe O-ringisin placeintheslot in thedrainassembly.DampentheO-ringwith water,thenreinsertcanister.(Donotuseoil,greaseor
anylubricantbesideswater.)Rotatethecanistersothe cautionlabelisvisible.
Attachsteamhoseto dispersiontubeandthento topofcanisterusinghoseclampsprovided.Useheawwire clampto securehosetocanister.
Makesuresteamhosehasaconstantslopeofat least2" perfoot betweenthedispersiontubeandthehumidifier.Anyandeverylowspotin the
steamhoseor pipemusthaveadripteeanddraintrap.Filldraintrapwith water beforemakingfinalconnections.
Attachandfully seattheelectrodeconductors(interchangeable)andthehighwater levelsensorwire.
Plumbthehumidifierto cold,hardorsoftenedwater.Donet usehot water because unheatedsupply water is useclto cool water
€lrainedfrom the humiditier. Donotusedemineralizedorreverseosmosiswater.Forproperoperation,supplywater pressuremustbe between
25psi and120psi.Hardor softenedwater maybeusedprovidedit hasconductivitybetween125IJS/cmand1250IJS/cm.
Supplywater pipingmustbefreeofoils, lubricants,solderflux andothercontaminants,whichcancausefoamingin thecanisterthat canleadto
watersputteringfromthe dispersiontubeintotheduct.
Installthesaddlevalveaccordingtothe instructionsprintedonthebag.Run1/4" coppertubingfromthesaddlevalveto thehumidifier.Connect
it to thefill valve.Doublewrenchto preventleakinganddamageto valve.
Note: Addingan inlineparticulatefilter canincreasecanisterlifein areaswith highlevelsof suspendedsolids.DONOTusefiltersthatrelease
scaleinhibitors,filtersofthis typecansignificantlydecreasecanisterlife.
10