Carrier CAC User manual

OWNER'S MANUAL
FOR BYPASS AND FAN POWERED HUMIDIFIERS
Includes Safety, Operating and Maintenance Instructions
ata!og:0G-HUM-03

Bypass and Fan Powered Humidifiers
Table of Contents Page
Introduction .................................................... 2
Principle of Operation............................................ 2
Operating Instructions ........................................... 4
Effect of Water Characteristics ................................... 8
Annual Maintenance ............................................. 8
Annual Summer Shutdown ....................................... 8
Periodic Preventative Maintenance ............................... 9
MaintenanceInstructions
Small and Large Bypass Humidifiers ........................... 10
Fan Powered Humidifiers ..................................... 11
Introduction
Thank youfor your recent humidifier purchase. We sincerely appreciate your
business and are pleased to add your nameto our growing list of customers.
Now, please take a few minutes and readthis booklet. Thiswill familiarize you
with the benefits you will receive from the equipment you just purchased and
help you understand the routine maintenance that will be required.
I. Prindple of Operation
You have purchased a humidifier that operates on the evaporative principle.
Itwill providethe proper relative humidity (see operating instructions) all during
the heating season. It is very possible that you have questions concerning what
your new humidifier can dofor you, andwhat you should doto receive maximum
benefits from it. This booklet is intended to answer these questions.

Thehumidifieroperatesin conjunctionwith the furnace blowermotor.When
the humidistatcallsfor humidityandthe blower motorisoperating,water flows
tothe distributionpanlocatedatthetop ofthe unit.Thewater is uniformlydis-
tributedacrossthewidth ofthe panandthroughascientificallydesignedsystem
of outlets.It flows bygravityoverthe humidifierpad.Dry,hot air ismoved
throughthe moisture-ladenhumidifierpadwhereevaporationtakes place.The
now-humidifiedair carriesmoistureinvaporformthroughoutthe home.
Thecorrectwater flow is determinedby an orifice in each unit.When the
unit is operating,therewill be a small, steadystreamofwater to drain,which
flushesaway mostofthe trouble-causingminerals. Donot use the saddle valve
to regulate the water flow. It is designed to be completely opened or closed.
The minerals and solid residue not trapped by the replaceable humidifier pad
are flushed down the drain. The drain also eliminates the problems caused by
stagnant water. This is the most effective and least expensive method to dispose
of trouble-causing minerals.
Trouble-free performance and minimum maintenance are assured by the
design features of the humidifier. All unit housing parts that come in contact with
water are non-metal and will never rust or corrode. Neither heat nor water will
affect them under normal operating conditions.
The humidifier pad, designed especially for uniform, high evaporation, and
the Scale Control Insert also efficiently trap mineral deposits which are often the
cause of damage to working parts in ordinary humidifiers. No "white dust" can
be distributed throughout the living quarters. The humidifier pad must be in good
condition to assure high capacity trouble-free performance. It should be
changed annually.
Older design water distribution trays have a granular coating in the bottom of
the distribution tray to provide equal distribution of water to each of the openings
assuring an even flow over the humidifier pad. Do notcleanthe mineral scale off
the bottomofthe water distributiontray at the end ofthe humidificationseason.
If the granular coating is removed, it is not necessary to purchase a new distri-
bution tray. You can accomplish the same uniform performance by applying a
small amount of liquid dishwashing soap over the entire inside surface of the
water distribution tray. This will allow the water to flow evenly through each of
the openings, provided the unit is level, in order to achieve maximum capacity.
The current distribution tray which incorporates a synthetic fabric liner that
replaces the granular coating, is designed to deliver water uniformly over the
entire top surface of the humidifier pad, provided it is mounted level. It is normal
for some mineral deposits to form in the distribution tray as it dries out between
humidification cycles. These deposits can actually help distribute water in the
tray, but if they form enough to block the openings, they should be removed as
described in the "Periodic Preventative Maintenance" section of this manual.

II. Operating Instructions
Your new humidifier is controlled by a manual humidistat, HumidiTracT"or
ThermidistatTM, installed either in the living area or in the cold air return.
Automatic HumidifierControl:(Manual Humidifier Control -see page 6)
YourHumidiTrac"Control isinstalledinthe coldair return. Duringthe first
heatingseason,yourHumidiTracTM Control needs to be setinitiallyto match
your home'scondition_Pleasefollow these stepswhen adjustingyour control
(referto FigureA).
1.Turnthe dialsettingknobto "5," which iswithinthe normal range. During
the next24-48hoursit may be necessaryto adjustthe dialformore or
lesshumidity,dependingonyour personalcomfortandhome's
requirements. Referto "TABLE1-Operation Guide".
2. Duringthe coldestportionofthe firstheatingseason, minoradjustments
may be necessary. Thisis dependentuponyour individualhome
construction,refer to "TABLE1-Operation Guide".
Condensation on windows
Lack of humidity
Humidifier doesnot operate
Reduce the setting on the control dial
by I increment.
Increase the setting on the control dial
by 1increment.
Turn dial to "Test." Make certain furnace and
blower are operating. If unit still doesn't operate,
consult your air conditioning and heating dealer.
Humidifier won't shut off Turn dial to "Off." If unit continuesto operate,
consult your air conditioning and heating dealer.
Test mode System operation is checked bysetting the knobto
"Test" Make certain furnace andblower are
operating. Humidifier will operate for one minute.
The relative humidity in your home will
now be accurately controlled to meet
your needs and should not need further
adjustment duringfuture heating
seasons. Make note ofthe dial setting
in the event you temporarily move the
knob when performing annual
maintenance ofthe Humidifier.
4
4
7
321
AUTOMATIC MODE
90-1054

YourAutomatic Humidifier, is a high precision system that will accurately
maintain the relative humidity in your home. For every I°F change in outdoor
temperature, the control will automatically adjust the indoor relative humidity
(RH) by 1/2%. If you would like to determine the RHin your home, follow
these steps:
1.Determine the outdoor temperature.
2.Activate the furnace blower by setting your thermostat fan switch to the
"On" position, or setting your thermostat to a higher temperature.
3.Turnthe control dial setting to the "Off" position. Then,slowly turn the
dial clockwise until you hear the solenoid valve "click on." Next, slowly
turn the dial counter-clockwise until you hear the solenoid valve "click
off." At this point, make note of the dial setting.
4. Locateyour dial setting on Table 2.Follow the dial setting to the right
until it intersects with the current outdoor temperature. This isthe
relative humidity in your home under existing conditions.
5. Returnthe thermostat and the Humidifier Controlto their original settings.
Outdoor Temperature (°F)
-I0 0 10 20 30 40
110 10 10 !5 20 25
..... li i
210 10 15 20 25 30
3 10 15 20 30 35
415 20 25 35 40
_ilii__i_i!i!i__i_i_i__i_o
2 _!_ _ 40 45
20 ..........
6 25 30 35 40 45 45
5
730 35 40 45 45 45
As an example, if the outdoor temperature is 20°F,and, following step 3,
the humidifier turns off at "5" onthe dial range, then the RH in your home is35%.
The HumidiTrac" Control will accurately control the humidity inyour home
to a maximum of 45%RHand a minimum of 10%RH.Thevalues of outdoor
temperature and dial settings mayfall in between or outside of the listed
values in Table 2.In these cases, you can only approximate your home'sactual
indoor RH.
5

Tocheck the humidifier's operation, note the current setting and set the
HumidiTracTM Control to the test mode when the furnace blower motor is
operating. Water will flow into the humidifier for 1minute and then it will turn
off.This insures the unit is operating properly. Donot leave the control in the
test mode as it will not operate. Resetthe control to it's original setting.
Manual HumidistatorHumidiTracTM in Manual Mode:(AutomaticHumidifier
Control -see page 4)
Yournew Humidifier is controlled by a humidifier control installedeither in
the living area (typically near the thermostat) or in the cold air return. It is
important to anticipate a drop in outdoor temperature and reduce the setting
accordinglyto avoid excessive condensation. Forexample, with an outdoor
temperature of 20°Fthe correct setting will be 35%relative humidity. If the
temperature is expected to fall to O°F'_hatevening, then merely reduce the
setting to 25%several hours prior to the temperature change.
The recommended settings on the humidifier control are based onyears of
research (seeTable 3) and experience as to what is best for the average
home.These settings represent a compromise between RHlevelsthat would
be most desirable for comfort reasons and humidity levels that are suitable for
protection of your home. For example, awintertime indoor RHof 50%may be
considered ideal by some, but unfortunately, it probably would result in
damageto your home. Observance ofthe recommended RHlevels onyour
humidistat, therefore, is an important safeguard. Condensation of water on
inside windows in the form of fogging or frost is usually an indication of too
high relative humidities. This same condensation can take place in other areas
in your home with the possibility of damage resulting.
+40OF.
+30°F
+20°F
+IO°F
O°F
-lO°F
-20°F
45%
40%
35%
30%
25%
2O%
15%
The Humidifier Control is a precision instrument that can be usedto
determine the RHaccurately in your home duringthe winter. Turnthe dial to the
lower setting, then reverse the dial direction slowly until a "click" is heard. At
this point, read the RHon the dial. This will bevery close to the actual RHin
your home.

Tocheckthe humidifieroperation,setthe humidifiercontrolabovethe
click point,makesurethat thewater saddlevalveis openandthatthereis
electricityto the unit.Generally,the furnaceandblower motormustbeoperat-
ingfor the humidifiercontrolto function.After thehumidifierhasoperatedfor
severalminutesandwater is enteringthe unitandcomingoutatthe drain,
reducethe humidifiercontrolsettingbelowthe click pointandthe unitshould
automaticallyshutoff.Nowsetthehumidistatdialatthe recommendedinside
relativehumidity,dependingonthe outsidetemperature.Followthe suggested
settingspriorto adropinthe outsidetemperature.
Additional Information
Be sure to keep fireplace dampers closed when not in use. They provide
an excellent escape route for heat, as well as humidity. Humidity is lost at an
even faster rate than heat because water vapor tends to seek its own level
and your humidifier would not be ableto replace it even when running atfull
capacity.
Onoccasion, indoor moisture producing activities such as clothes drying,
cooking, showers, etc., mayraise the relative humidity level higher than it
should be,even though the Humidifier is not operating. Telltale indications,
again, are condensation or frost on cold surfaces such as windows, doors,
walls, etc. If such condensation persists for several hours, your home should
be ventilated to dissipate the potentially damaging excess moisture.
7

III. Effectof Water L'haracteristics
Your humidifier will operate effectively using either hard or mechanically
softened water.
Any type of water (hard, soft, hot, or cold) is acceptable for usewith the
drain-type humidifiers. Hot supply water, 140° maximum,is recommended for
all heat pump applications.The useof hotsupplywater will also increasethe
amountof humiditygeneratedin otherapplications.The heat inthe water
increasesevaporationandthe water goingtothe drain is coldto thetouch. For
better performanceit is recommendedthat soft(reducedminerals)orfiltered
water be suppliedtothe humidifierpad. Thiscanhelpreduce the amountof
scale and mineraldepositsthat canaccumulateonthe pad.
IV.Annual Maintenance
Forbestperformance,we recommendthat youreplacethe humidiferpad
in your humidifierannually.
• Callthe installerof your humidifier. This information is often found on your
equipment.
V. Annual Summer Shutdown
FORTHESUMMER HUMIDIFIERSHUTDOWN,SIMPLYTURNTHE
HUMIDISTATCONTROLTOTHE"OFF"SETTINGAND CLOSETHEDAMPERIN
THEBYPASSHUMIDIFIER.(TURNDAMPERHANDLETO"SUMMER" POSITION)
8

VI. PeriodicPreventativeMaintenance
NOTE: Periodic inspection and preventative maintenance of your total heat-
ing system is important for efficient and safe operation. Your dealer will include
humidifier service during a maintenance inspection.
Your humidifier is equipped with an in-line water strainer and orifice as
shown below. These parts should be inspected and cleaned periodically to
assure continued proper unit performance.
- UTLET
COMPRESSION
NUT
ORIFICE
_ OLENOID
VALVE
INLET
INLET
InspectionandServiceInstructions
1. Disconnectelectrical powerto the furnaceandshut off
water supply.
2. Disconnectthe water line atthe inletfitting.
3. Removethe in-line strainerfrom insidethe inletfitting by
usinga smallnail or wire.
4.Flushthe in-line strainerto clean it. If it isnecessary
toreplacethe strainer,contactyour dealerfor a
replacement.
5.Disconnectthewater lineat the outletfitting.
6.Inspectplasticfeedtubeby gentlyflexingit andlooking
for cracks orsignsofwear.Replacetube if it is cracked,
brittle,or hasbeendamaged.
7.Removetheorifice fromthe copperor plastictube and
makesurethis smallopeningis unplugged.
8.Replacetheorifice andreconnectthe outletwater line
(DoubleWrenchToPreventLeakingAndValveDamage).
9.Replacethe inlinestrainerandreconnectthe inletwater line (DoubleWrenchTo
PreventLeakingAndValveDamage),
10.Inspect the drain hose to make sure it has a constant downward slope and is
not flattened or blocked. Flexthe hose to loosen any mineral deposits or
blockage. Flush it with water under pressure to remove any debris.
11.Turnonwater supplyandreconnectelectricalpowerto thefurnace.

90-Bla
1. FrontCover
2. FeedTube
3. Nozzle
4. EvaporativeAssembly
5. DistributionTray
a. "V" Notches
7. HumidifierPad
8. Scale Control Insert
9. DrainHose
10.BypassDamper
CAUTION]Suddenoperationmay cause personalinjuryor property
Turnhumidistatto "OFF"beforeservicing.
1.
,
,
.
damage.
Note humidistat settingandturn
humidistattothe "OFF"position.
Atthe sideofthe unitoppositethe
airflowduct,pull front cover(1)off
holdingwith bothhandsandset aside.
Carefullypullthe feedtube(2)out of
the nozzle(3)atthe topofthe
evaporativeassembly(4).Pullthis
assemblyout bygraspingattop and
tippingout.
Removethe blackdistributiontray(5)
from the evaporativeassemblyby
unsnappingthewhite plasticendsof
the ScaleControl Insert(8),from the
tabsatthe endofthe tray. Followthe
instructions belowdependingupon
thetypeof distributiontrayinyour
humidifier:
Fortrayswith asvntheticfabric liner:
Lightlyscrapeout or brushoffany
mineral deposits,beingcarefulnotto
stretchor loosenthe syntheticfabric
liner.Soakingthetrayinvinegaror a
lime-removingagentishelpfulwhen
tryingtoremovestubbornmineral
deposits,
Fortravswith aranular coatina:Donot
scrapeoffthe granularcoating,but
lightly scrapeout anymineraldeposits
andcleanthe"V"notches (6).This
texturedsurfacehelps ensureeven
waterflow for maximumperformance.
Ifthe granularcoatinghas been
removed,placeseveraldropsofliquid
dishwashingsoapon thedistribution
tray.Thiswillonlyneedto bedone
once ifthere isno granularcoating.
5. Slidethehumidifier pad(7)outfrom the
plasticScaleControl Insert18).Cleanthe insert
frame bytwistingandflexing it toloosenthe
calciumdeposits,or usea putty knife.Replacethe
humidifier pad (PartNo. Pl10-1045for Small
BypassHumidifierand PartNo. Pl10-3545for Large
BypassHumidifier)andslidethe padbackintothe
scalecontrolinsertframewith colormark up.Snap
the blackdistributiontray(5)backintoplace.
6. Inspectplasticfeedtubebygentlyflexing itand
lookingfor cracksor signsofwear. Replacetube if
itis cracked,brittle,or hasbeendamaged.
7. Reinstalltheevaporativeassemblyintothe unitby
fitting its draintubeintothe roundreceptacleatthe
baseof theunit.Pushtheassemblyinat thetop
againstthebeveledtabsthatwill holditinplace.
Pushtheendofthefeed tubebackfirmly intothe
nozzleandreplace thefront cover.
8. Removethedrainhose(9)from thebottomofthe
unitandbendandflex itto loosenthe internal
calciumdeposits.Thenflush itwithwaterunder
pressureandslipit backontotheblackdrainfitting.
Makesurethedrainhosehasa constant
downwardslopeandisnotflattened orblocked.
9. Checksystemoperation:
ManualHumidistat:Withthefurnace blower
operatingandthefurnace callingfor heat,turnup
Humidistatandchecksystemoperation.
HumidiTracTM HumidifierControl:(Automaticor
Manual)ChecksystemoperationandresetChange
HumidifierPadindicatorbysettingthe knobto
"Test/Reset".Withfurnace bloweroperatingand
furnace callingfor heat,humidifierwilloperatefor
one minute.DONOTLEAVEINTESTMODEAS
HUMIDIFIERWILLNOTOPERATE.
10. SetManualHumidistatDrHumid_racTM Humidifier
Controlto its originalposition.
10