SPX FLOW Hankison HPR Series - Maintenance Procedures; General Maintenance Recommendations; Drain Valve Disassembly and Servicing

5
MAINTENANCE
The dryers require little maintenance for satisfactory opera-
tion.Gooddryerperformancecanbeexpectedifthefollowing
routinemaintenancestepsaretaken.
Disconnectpowersupplyanddepressurizedryer
beforeperforminganymaintenance.
General
Forcontinuedgoodperformanceofyourrefrigerateddryer,
allrefrigerationsystemmaintenanceshouldbeperformedby
acompetentrefrigerationmechanic.
NOTE:Beforecorrectivemaintenanceisdoneduringthewar-
rantyperiod,callyourlocaldistributorandproceedaccordingto
instructions.Refertothewarrantyforlimitsofyourcoverage.
Daily Maintenance
Checktheseparatorforcondensatedischarge.Ifnodischarge
isevident,depressurizeandperformthefollowing:
1. ElectricDrain-Cleanstrainerand/orclean/replacesolenoid
valve.
Monthly Maintenance
Inspectthecondensercoils.Removeaccumulateddustanddirt
withasoftbrushorwithairfromanOSHAapprovedcompressed
airnozzlethatlimitsthedischargepressureto30psig.
Electronic Drain Valve Disassembly and Servicing
Donotdisassembledrainvalvetimerorattempt
torepairelectricalparts.Replacetimerifdefective.
Thedrainvalvedischargecondensatethroughafull-portdrain
opening. The valve body may need to be cleaned under condi-
tionsofgrossparticulatecontamination.
To disassemble the drain valve body for cleaning and other
maintenance:
1. Turnpowerswitchoff.
2. Disconnectmainpowersupplytodryer.
3. Depressurizeunit.
4. LockoutandtagpowersupplyinaccordancewithOSHA
requirements.
Ifpowersupplyisnotconnectedandunitisnot
depressurizedbeforedisassembly,seriouspersonalinjuryand
valve damage may result.
5. Removescrewandwasherfromfrontofthedrainvalve.
6. Removethepowersupplyconnectorandgasket(withthe
timerassemblyifattached)fromthesolenoidcoilhousing.
Donotdamageorlosethegasket.
7. Remove coil xing nut and spring washer from top of
solenoid coil housing.
8. Liftsolenoidcoilhousingoffsolenoidcoreinvalvebody.
9. Unscrewsolenoidcorefromvalvebody.
Oncethedrainvalveisdisassembled,thefollowingmaintenance
canbeperformed.
1. Inspect internal parts of valve body; clean or replace as
required.
 NOTE:  Replace solenoid valve if component damage is
observed.
2. Removedebrisfromvalvebody.
3. Wipesolenoidcorecomponentswithacleanclothorblow
outdebriswithcompressedairfromanOSHA-approvedair
nozzlethatlimitsitsdischargepressureto30psig.
4. Checkthattheplungerassemblyiscleanandmovesfreely
in housing.
5. Iftimerisattachedtovalvebody,checkelectricalcontinuity
across timer assembly.
To reassemble the drain valve, reverse the sequence of
theprecedingsteps.Afterthedrainvalveisreassembled,
connectthemainpowersupplytothedryer.Whenthe
dryerisreturnedtoservice,checkthedrainvalveforairor
condensateleaks;tightenconnectionsasrequiredtocor-
rectleaks.Checkthedraincycle;adjustthetimeraccording
totheprocedureinthedrainvalveadjustmentsection.
Returns to Manufacturer
Ifthedryeroracomponentofthedryermustbereturnedto
themanufacturer,rstcallyourlocaldistributorforareturn
authorizationnumberandshippingaddress.Yourdistributor
willinformyouwhetherthedryeroronlyacomponentmustbe
returned.Markthepackagewiththereturnauthorizationnum-
berandshipfreightprepaidasdirectedbyyourlocaldistributor.