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WIRINGTOCONSTANT120VACUNE
EXTERNALTOFURNACE
Junction _
_U J Inllal SiI# _ddl In Rltum Air Plenum
IllI (_ _-._lly _ o=_s)
IIII Pu_ thisacce_lotyseparatelyifneeded.
IIII Av=_ _o_s_-sP,_,_ Ser_=
[] 6 Usinglowvoltagewiresupplied,connectspadeter- I
minalstosolenoidvalveon topofhumidifier. J NOTE:Wiringmustconformto localcodes.
I
[] 7 Position and support wire to humidistat location.
Separate wire. Cut only one wire, strip ends.
[] 8 Feed wires thru opening in humidistatback plate
and attachtoscrewterminals.Mounthumidistaton retumair ple-
numusing(4) #8 screwsprovided.Installshaftextension,cover
and knob(Fig. 16).
CONTROL CIRCUIT: Forproperoperationand waterconserve-
fion, thishumidifiermustbe wiredso itwilloperateonlywhen the
furnace bloweris runningand the humidistatcalls for additional
humidity.Two methodsare shown(Fig. 17and Fig. 18):
Fig 17: WIRING INTO FURNACE - FOR ANY FORCED AIR
FURNACE WITH SINGLE SPEED 120 VAC BLOWERONLY.
CAUTION: Do notuse thismethodwith multi-speedblow-
em or blowemotherthan 120 VAC.
Rg 18: WIRING EXTERNALTO FURNACE- FORANYFORCED
AIRFURNACE INCLUDING FURNACEWITH OTHER THAN 120
VAC BLOWER MOTOR OR FURNACE WITH MULTI-SPEED
BLOWER MOTOR.
NOTE: Somefurnacesare equippedwith accessorytermi-
nalsthat can beusedfor thehumidifier.Inthis case,consult
thefumane manufacturer'srecommendationfor wiring.
[] 12 Attach"OperatingInstructionLaber toreturnair ple-
numnexttothe humidistat.Peeloffpaperbackingandsticklabel
indesiredlocation.
operation
[] 1 Set knobtothe lowesttemperaturepredictedfora
24 hourpe_nd. Becauseofdifferencesinhouseconstruction you
maywanttotrya higherorlowersettingtoachieveproperhumidity.
[] 2 Change knob settings as outdoor temperature
changesoccur.
[
WARNING: DO NOT LEAVEKNOBSET IN "TEST" POSI-
TION ABOVE %20" OR HUMIDIFIER WILL RUN CON-
STANTLY.
I
IF SWEATING OF WINDOWS OR WALLS OCCURS OR IF AIR
IS TOO DRY:
Check dial seffing. Indicatorshouldpoint to the lowest24 hour
temperature.If settingdoes not agree, readjustknobto proper
i numberandwait24 hoursforsweatingtostop. Ifdialsettingwas
correctand conditions havenot changed, rotateknobbeckand
forthfromTEST toMINIMUM HUMIDITY SETTING. Ifhumidifier
goesON and OFF,control isoperatingproperly.
[] 9 Tum offelectricityat fusebox.Using(two)wire nuts
and conduit nutsupplied, install24 VAC transformerto 120 VAC
supplyjunctionbox followingthe controlcircuitselected sothe
transformer will bepowered onlywhen the fumaceblowerisrun-
ning.Donot useexistingtransformer on fumace.
8
[] 10 Connect spade terminals of low voltage wire to
spadeterminalsoftransformer.
[] 11 Tumonalectridtyandtastoparationbyobasrvinglf
water isflowingtodrain while fumace isrunning and humidistat
dialIsset to "toet"position.
AIR CONDmONING - IMPORTANT:
If yourfurnacehasair conditioning (cooling),dose the damper
completely duringsummermonths andtumthe humidistattothe
MinimumHumiditysetting.BESURE TO OPEN DAMPER DUR-
ING HEATING SEASON ANDRESETTHE HUMIDISTAT.
WATER FLOW RATE:
At standardwater linepreseureof50-60 PSI(poundsper square
inch),waterwillflowthrough humidifierat approximatelyfour(4)
gallonsper hour.About0.7 gallonspar hourof the fourwill be
evaporated,leaving3.3gallons tobedrainedaway.Sincethe fur-
nsoeonlyrunsan estimated30-40% ofthe beating season,and
the_umldifter is wired to operateonly withthe fumase blower,
and onlywhen humidityIsrequired,the actual amountof water
drainedper dayismuchlessthan wouldbe expected.