Carrier 50SZ024 - Page 16

1.Inspectairfilter(s)eachmonth.Cleanorreplacewhen
necessary.
2.Inspectindoorcoil,drainpan,andcondensatedraineach
coolingseasonforcleanliness.(;leanwhennecessary.
3.Inspectblowermotorandwheelforcleanlinesseachcooling
season.(;leanwhennecessary.
4.Checkelectricalconnectionsfortightnessandcontrolsfor
properoperationeachcoolingseason.Servicewhen
necessary.
5.Ensureelectricwiresarenotincontactwithrefrigerant
tubingorsharpmetaledges.
AIRFILTER
IMPORTANT:Neveroperatetheunitwithoutasuitableairfilter
inthereturn-airductsystem.Alwaysreplacethefilterwiththesame
dimensionalsizeandtypeasoriginallyinstalled.SeeTable1for
recommendedfiltersizes.
Inspectairfilter(s)at leastonceeachmonthandreplace
(throwaway-type)orclean(cleanable-type)atleasttwiceduring
eachcoolingseasonandtwiceduringtheheatingseason,or
wheneverthefilterbecomescloggedwithdustandlint.
INDOORBLOWERANDMOTOR
NOTE:Allmotorsarepre-lubricated.Donotattempttolubricate
thesemotors.
Forlongerlife,operatingeconomy,andcontinuingefficiency,clean
accumulateddirtandgreasefromtheblowerwheelandmotor
annually.
ELECTRICALSHOCKHAZARD
Failuretofollowthiswarningcouldresultinpersonalinjury
ordeath.
Disconnectandtagelectricalpowertotheunitbeforecleaning
andlubricatingtheblowermotorandwheel.
Tocleantheblowermotorandwheel:
1.Removeanddisassembleblowerassemblyasfollows:
a.Removeunitaccesspanel.
b.Disconnectmotorleadfromtimedelayrelay(TDR).
DisconnectyellowleadfromterminalL2ofthecontactor.
c.Onallunitsremoveblowerassemblyfromunit.Remove
screwssecuringblowertoblowerpartitionandslide
assemblyout.Becarefulnottotearinsulationinblower
compartment.
d.Ensureproperreassemblybymarkingblowerwheeland
motorinrelationtoblowerhousingbeforedisassembly.
e.Loosensetscrew(s)thatsecureswheeltomotorshaft,
removescrewsthatsecuremotormountbracketsto
housing,andslidemotorandmotormountoutof
housing.
2.Removeandcleanblowerwheelasfollows:
a.Ensureproperreassemblybymarkingwheelorientation.
b.Liftwheelfromhousing.Whenhandlingand/orcleaning
blowerwheel,besurenottodisturbbalanceweights
(clips)onblowerwheelvanes.
c.Removecaked-ondirtfromwheelandhousingwitha
brush.Removelintand/ordirtaccumulationsfromwheel
andhousingwithvacuumcleaner,usingsoftbrush
attachment.Removegreaseandoilwithmildsolvent.
d.Reassemblewheelintohousing.
e.Reassemblemotorintohousing.Besuresetscrewsare
tightenedonmotorshaftflatsandnotonroundpartof
shaft.
f. Reinstallunitaccesspanel.
3.Restoreelectricalpowertounit.Startunitandcheckfor
properblowerrotationandmotorspeedsduringheatingand
coolingcycles.
OUTDOORCOIL,INDOOR(;OIL,ANDCONDENSATE
DRAINPAN
Inspectthecondensercoil,evaporatorcoil.andcondensatedrain
panatleastonceeachyear.
Thecoilsareeasilycleanedwhendry;therefore,inspectandclean
thecoilseitherbeforeoraftereachcoolingseason.Removeall
obstructions,includingweedsandshrubs,thatinterferewiththe
airflowthroughthecondensercoil.
Straightenbentfinswithafincomb.Ifcoatedwithdirtorlint,clean
thecoilswithavacuumcleaner,usingthesoftbrushattachment.Be
carefulnottobendthefins.Ifcoatedwithoilorgrease,cleanthe
coilswithamilddetergentandwatersolution.Rinsecoilswithclear
water,usingagardenhose.Becarefulnottosplashwateronmotors.
insulation,wiring,orairfilter(s).Forbestresults,spraycondenser
coilfinsfrominsidetooutsidetheunit.Onunitswithanouterand
innercondensercoil.besuretocleanbetweenthecoils.Besureto
flushalldirtanddebrisfromtheunitbase.
Inspectthedrainpanandcondensatedrainlinewheninspectingthe
coils.Cleanthedrainpanandcondensatedrainbyremovingall
foreignmatterfromthepan.Flushthepananddraintroughwith
clearwater.Donotsplashwaterontheinsulation,motor,wiring,or
airfilter(s).Ifthedraintroughisrestricted,clearitwitha"plumbers
snake"orsimilarprobedevice.
OUTDOORFAN
UNIT OPERATION HAZARD
Failure to follow this caution may result in damage to unit
components.
Keep the condenser fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of unit.
1. Remove 6 screws holding outdoor grille and motor to top
cover.
2. Turn motor/grille assembly upside down on top cover to
expose fan blade.
3. Inspect the fan blades for cracks or bends.
4. If fan needs to be removed, loosen setscrew and slide fan off
motor shaft.
5. When replacing fan blade, position blade so that the hub is
1/8 in. away from the motor end (1/8 in. of motor shaft will
be visible) (see Fig. 14).
6. Ensure that set screw engages the flat area on the motor shaft
when tightening.
7. Replace grille.
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