Quest Engineering PowerDry 385D Pro Manual

Installation, Operation and Maintenance Instructions
– Read and Save These Instructions –
This manual is provided to acquaint you with
the desiccant dehumidier so that installation,
operation and maintenance can proceed suc-
cessfully. Ultimate satisfaction depends on the
quality of installation and a thorough under-
standing of this equipment. The dehumidier
is built around tested engineering principles
and has passed a thorough inspection for
quality of workmanship and function.
Quest DRY150
Installation, Operation and Maintenance Instructions
4201 Lien Rd Phone [phone]
Madison, WI 53704 Toll-Free 1-866-933-7486
www.QuestProtect.com [e-mail]
– Read and Save These Instructions –
Specications subject to change without notice. TS-739
06/14
1
Quest PowerDry 385D Pro
Quest PowerDry 385D Pro:
• Lowdewpointoperation
• 115Pints/Day@AHAM
• Wideoperatingrange
• 22Ampstotalpowerconsumption
• Factoryinstalled115VACpowercords
(2required@15Ampseach)
• Verticalorhorizontaloperation
• Multipleductingoptions Water Removal Rates (Pints/Day)
56 Pints 100°F, 20%
160 Pints 90° F, 90%
135 Pints 80° F, 80%
115 Pints 80° F, 60% (AHAM)
115 Pints 70° F, 80%
105 Pints 70° F, 60%
105 Pints 60° F, 80%
100 Pints 60° F, 60%
110 Pints 50° F, 80%
90 Pints 50° F, 60%
25 Pints 10° F, 80%
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Table of Contents
SafetyPrecautions......................................................3
1. Specications.......................................................4
2. Operation.............................................................5
 2.1HowtheQuestPowerDry385DProWorks....5
 2.2AvoidingOverdrying......................................5
 2.3UniversalUseSet-Up.....................................6
 2.4Location.........................................................6
 2.5ElectricalRequirements..................................6
 2.6ControlPanel.................................................7
  2.6aPowerSwitch.........................................7
  2.6bPilotLight...............................................7
  2.6cHourMeter............................................7
 2.7DuctingConnections......................................7
 2.8StorageandTransportation.............................8
3. Maintanence........................................................8
 3.1AirFilterReplacement....................................8
4. Service.................................................................8
 4.1WarrantyInformation.....................................9
5. WiringDiagram...................................................9
6. ServicePartsList.................................................10
 Warranty............................................................11
SerialNo.______________________________________
PurchaseDate______/______/_____
Dealer’sName___________________________________

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Safety Precautions
Readtheinstallation,operationandmaintenanceinstructionscarefullybeforeinstallingandoperating
thisdevice.Properadherencetotheseinstructionsisessentialtoobtainmaximumbenetfromyour
QuestPowerDry385DPro.
READ AND SAVE THESE INSTRUCTIONS
TheQuestPowerDry385DProcanbeinstalledinavarietyof
locationstomeettheowner’sneedsaslistedbelow.Inallcases,
keepthefollowingcautionsinmind:
• TheQuestPowerDry385DProisdesignedtobeinstalled
INDOORS ONLY.
• Ifusednearwater,theunitshouldbepluggedintoGFCIcircuits
• DO NOTusetheQuestPowerDry385DProasabenchortable
• Avoiddischargingtheprocessairdirectlyatpeople
• ReactivationoutletairMUSTbedischargedintoalocationthat
cantoleratehightemperature,moistair.
• Ifthereactivationoutletductworkpassesthroughacoldspace,
theductmustbeinsulatedtopreventcondensationfromforming
insidetheduct.
TheQuestPowerDry385DProsupportsmulti-positionoperation
andmultipleductingoptions.InEVERYcasetheReactivation
OutletairMUSTbeductedoutofthedryingspaceandtoa
locationtolerantofhightemperaturemoistair(usuallyoutside).

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1. Specications
Part Number: 4029110
Power: 2Circuits;11Amps,115VACeach
 22Ampstotalpowerconsumption
Kilowatts: 2.5(63KWh/Day)
Capacity
per Day: 115Pints(80°F60%RH)
Blower: 385CFMProcessAriow@0”ESP
 75CFMReactivationAirow@0”ESP
Temperature 
Range: -10°Fto140°F*
Filters: ProcessFilterSize:16”X20”X2”
 ReactivationFilterSize:12”X12”X1”
Duct ProcessInlet:12”Flex-Duct(optional)
Connections ProcessOutlet:10”LayFlatcollar(optional)
 ReactivationInlet:6”Flex-Duct(optional)
 ReactivationOutlet:6”Flex-Duct(required)

Range: -10°Fto140°F*
Warranty: 1YearPartsandLabor
*Low temperature performance is dependent on reactivation air source. Supplying warmer reactivation
air will signicantly increase water removal.
Dimensions:
  Unit  Shipping
Width  24.25”  27.5”
Height  40”  45.5”
Depth  21.375” 22”
Weight  105Lb  130Lb
Accessories:
4026859 6”MetalizedPolyesterFlex-Duct25’(Standard)
4020128 6”InsulatedFlex-Duct25’
4024750 12”MetalizedPolyesterFlexDuct25’
4022537 10”LayFlatDuct500’
4024935 10”LayFlatDuct250’
Process Air Fiter Replacement:
4021475 16”x20”x2”MERV11Filter(Standard)
4024969 16”x20”x2”MERV6Filter(Optional)
4022164 16”x20”x2”MERV14Filter(Optional)
Reactivation Air Filter Replacement:
4026860 12”x12”x1”MERV7Filter(Standard)
4026315 12”x12”x1”MERV8Filter(Optional)

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2. Operation
2.1 How the Quest PowerDry 385D Pro works
Your Quest PowerDry 385D Pro has two separate air streams that run through it – Process (Fig. 1) and Reactiva-
tion (Fig. 2).
Note: Check for airow at all inlets and outlets. DO NOT run unit if no airow is detected.
Process Air Stream:
P1 – 385CFMofairenters(12”ex)thetopofthe
machineand...
P2 – ...watervaporfromincomingairisdepositedon
thedesiccantwheel.
P3 –385CFMofdryairexits(10”layat)themachine.
Reactivation Air Stream:
R1 –75CFMofairenters(6”ex)thelower-sideof
themachineand...
R2 – passesovertheheatercoils.
R3 –Watervaporispickedupfromthedesiccant
wheelbythehotairand...
R4 –...75CFMofwetairexits(6”ex)themachine.
2.2 Avoiding Over-drying
ThePowerDry385DProisapowerfultool
capableofremovingagreatdealofwaterfrom
mostenvironments.Caremustbetakentoavoid
secondarydamagesofover-dryingandorunexpected
condensation.YourQuestPowerDry385DPro
removesvaporwaterfromtheincomingprocessairstream
(Fig.1)andtransfersittotheoutgoingreactivationairstream(Fig.2).
Thereactivationexhaustairishotandwet.
Take care to prevent the reactivation exhaust air stream from causing secondary damage due to
condensation.
Ifthereactivationexhaustairstreamcoolsbelowitsdewpointliquidwaterwillcondenseinsidetheductwork
creatingpuddles.Ifthereactivationexhaustairstreamisnotexhaustedcompletelyfromthestructureitcan
alsocausesecondarywaterdamage.
YourQuestPowerDry385DProdoesnotproduceliquidwaterinternaltothemachine.Thereisno
condensatepumpandnodrainhose.
ThePowerDry385DProdesiccantdehumidierwillcontinuetoremovewaterfromalreadydry,coldair.Itis
possibletoover-dryobjectsandorstructures.
Figure 1: Desiccant process air stream.
Figure 2: Desiccant reactivation air stream.
P1
P2
P3

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Care must be taken to avoid secondary damage due to over-
drying.
2.3 Universal Use Set-Up
Whenconditionswarranttheuseofadesiccantdehumidier,
usetheset-upshownbelow(Fig.3).Thisuniversalset-upwill
produceefcientdrying,whileavoidingsecondarydamage.
TheQuestPowerDry385DProhasbeendesignedwiththe
goalofbeingeasytouseeverytime.
TheQuestPowerDry385DProcomescompleteandcanbe
pluggedinandturnedon.Connectedthisway,theQuest
PowerDry385DProwillruncontinuously.
Note: Check for airow at all inlets and outlets. DO NOT run unit if no airow is
detected.
2.4 Location
Note the following precautions when locating the Quest PowerDry 385D Pro:
• ItisdesignedtobeusedINDOORS ONLY.
• Ifusedonawaterlossworksite,plugitintoGROUND FAULT CIRCUIT INTERRUPT (GFCI) OUTLETS
• Theairinletontopandthesideoutletmustbeatleast
1footfromwallsandotherairowobstructions.
• Ifthehumidareaisverylarge,dehumidicationcanbeimprovedbyaddinganoutletducttocirculateprocessairto
stagnantareas.
• DO NOTusetheQuestPowerDry385DProasabenchortable.
2.5 Electrical Requirements
Whenusedonawaterlossworksite,groundfaultcircuitinterrupter(GFCI)outletsarerequired.
YourQuestPowerDry385DProrequiresatotalof22amps,115VAC.Inordertorunatall,thismachinemustbe
pluggedintotwoseparatecircuitseachwithaminimumof11ampsdedicatedcapacityavailable.
ThePowerDry385DProhastwoseparatepowercords,eachcordmustbepluggedintoitsown15ampcircuit.Ifboth
cordsarepluggedintothesame15ampcircuitthiscircuitwilltripwhentheunitisturnedon.
AnothersituationtoavoidisthatoneorbothofthecircuitswhichthePowerDry385DProisusingcanbetrippedby
otherappliancesdrawingpowerfromeithercircuit.Thiscanhappenwellafterajobsitehasbeenset-upasinthecase
withafreezercompressorturningon.
CaremustbetakentoinsurethatthePowerDry385DProalwayshassufcientpoweravailabletorunwithouttripping
breakersorblowingfuses.
Figure 3: Universal PowerDry 385D
Pro Set-up

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Ifyourlocationrequirestheuseofanextensioncord,usesafetechniquesinselectionandconnection.Suchcords
mustbegroundedandratedforcarrying11amps:14gaugeminimumforoneextensionlessthan25ftinlengthor
12gaugeforoneextensionlessthan50ftinlength.
2.6 Control Panel
2.6A Power Switch
ThePowerDry385DProhasonecontroldevice,thepowerswitch.Whenthepowerswitchismovedtothe“on”
positionyourportabledesiccantisdehumidifying.Themachinewillcontinuetodehumidifyinallconditionsuntil
thepoweristurnedoff:Thereisnodehumidistat(seeover-drywarningsection2.2).
2.6B Pilot Light
ThepowerindicatorlampilluminatestoindicatethatthePowerDry385DProisfunctioningproperly.This
indicatorishelpfulwhenajobsiteistoonoisytoknowwhatequipmentisrunningproperly.Ataglancefrom
acrosstheroomtheoperatorcanverifythatthePowerDry385DProisoperatingasitshould.
2.6C Hour Meter
ThehourmeterwillrunwheneveryourPowerDry385DProison.Thisdigitalhourmetermeasuresthecumulative
timeofoperationinone-tenthhourincrements.Thisnon-resettabletimeisoftenusedtoverifyhoursonajoborto
schedulemaintenance.WhenthePowerDry385DProisun-pluggedthetimerwillcontinuetoholdanddisplay
thecumulativehoursrun.
2.7 Ducting Connections
Usingexcessductlengthsignicantlyreducesairowvolumethroughduct.Thisistrueinanyapplication.Ifthe
jobathandneedsashortlengthofduct,cutasectiontotheappropriatelength.Ifairowisrestrictedbyexcess
length,performancewillsuffer.Thesamecanbesaidofexcessbendsintheducting.
ThreedifferentductsizesareusedonthePowerDry385DPro.AllductingmaterialsareavailablefromTherma-
StorLLC(seeaccessorieslistsection1).
Process in: 12” ex duct.
Toattachexducttotheprocessairintake,pushthewireoftherstcoupleofloopsdownbelowthefourtabsin
thetopcover.
Process out: 10” diameter lay at plastic duct.
Wheninatedthisductingformsa10”circle.10”layatductingattachestothePowerDry385DProbymeansof
a12”x6”wirerectangle.Toattachlayatductingtotheprocessexhaustair(Fig.1,P5),puttheplasticductend
throughthecollarcenterandrolltheplasticducting’sendoutwardsothatitoverlapstheoutsideofthecollar.The
ductandcollarquicklyattachtothePowerDry385DProbysnappingoverthefourscrewpostssurroundingthe
processairexhaust(Fig.1,P5).
Reactivation in & out: 6” ex duct.
Bothreactivationairstreamsusethesametypeofductconnections.
The6”exductingconnectionsonthePowerDry385DProconsistofadetachable6”startingcollar.Slide6”ex
ductingoverthestartingcollarandzip-tieorducttapeinplace.Toremovethestartingcollar(anditsattached
ductinglength)depressthesnapbuttonandrotatetheductcollar15°clockwise.Afterrotatingpulltheductcollar
straightoutfromthecabinet.Flexductandcollarmaybestoredbeneathtopcover.

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2.8 Storage and Transportation
TheQuestPowerDry385DProcanbetransportedandstoredineitheruprightorhorizontalpositions.
Thereisastoragecompartmentunderthetopcoverofyourdehumidier.Thiscompartmentislargeenoughtostore
reactivationcollars,powercords,lter(asused),aswellasadditionalsmallitemsthatyoumayrequireonyourjob
site.
3 Maintenance
3.1 Air Filter Replacement
TheQuestPowerDry385DProisequippedwithtwopleated
fabricairltersthatmustbecheckedregularly.
Process air stream lter:
This16”x20”x2”lterislocatedinthetopofyourPowerDry
385DProunderneaththetopcover.Thestockltersupplied
carriesaMERV-11ltrationefciencyrating.Thislterprevents
loadingthedesiccantwheelwithforeignmatter.
Reactivation air stream lter:
This12”x12x1”lterislocatedinthebottomofyourPowerDry
385DPro.Tochangethereactivationairlter,laythePowerDry
385DProdowninahorizontalposition.Thelteraccessslotislocatedonthebottomofthemachine(Fig.4).Open
retainmentclip,removeoldlter,andreplacewithfreshlter.
ThestockltersuppliedcarriesaMERV-7ltrationefciencyrating.Thisltrationpreventspluggingtheheateror
loadingthedesiccantwheelwithforeignmatter.
Operatingtheunitwithadirtylterwillreducethedehumidier’scapacityandefciencyandmaycausetheheater
coiltocutoutonthermaloverload.
Theltercangenerallybevacuumedcleanseveraltimesbeforeneedingreplacement.Replacementlterscanbe
orderedfromthefactoryorpurchasedlocallyifavailable.
DO NOToperatetheunitwithouttheltersorwithless
effectiveltersasthedesiccantwheelinsidetheunitwillbecomecloggedandrequiredisassemblytoclean.
4 Service
CAUTION: Servicing the Quest PowerDry 385D Pro with its high voltage circuitry presents a health hazard which
could result in death, serious bodily injury, and/or property damage. Only qualied service people should service
this unit.
CAUTION-ELECTRICAL SHOCK HAZARD: Electrical power must be present to perform some tests; these tests
should be performed only by a qualied service person.
Note: Check for airow at all inlets and outlets. Do not run unit if no airow is detected.
Retainment
Clip

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4.1 Warranty
Awarrantycerticatehasbeenenclosedwiththisunit;readitbeforeanyrepairisinitiated.Ifawarrantyrepairis
required,callthefactoryrstat1-800-533-7533Ext.8459forwarrantyclaimauthorizationandtechnicalassistance.
5 Wiring Diagram
Figure 5: Electrical schematic of Quest PowerDry 385D Pro
LABEL PART NO. REV.
4035447 A
Step 1: Remove three #10 screws holding reactivation duct in place
(1A, 1B, 1C). Push duct section in toward wheel (1D).
Step 2: Unplug wheel drive motor wires (2).
Step 3: Remove four ¼” screws holding cassette in place (3A, 3B, 3C, 3D).
Step 4: Lift cassette up and out of cabinet to avoid tearing
lower reactivation gasket.
Step 5: Installation is reverse of removal.
Cassette Removal Instructions
1B
1C
2
3A
3B
3C
3D
1D
1A
HOUR
METER
POWER LIGHT
PROCESS BLOWER
MAIN
POWER
SWITCH
REACT
BLOWER
WHEEL DRIVE MOTOR
WIRING
BLOCK
RELAY 1
4
6
0
1
PROCESS
CAPACITOR
RELAY 2
4
6
0
1
REACT
CAPACITOR
200°F
CUTOUT
140°F
CUTOUT
BLK BLK
BLK
BLU
BLU
BLU
BLU
BRN BRN
WHT
ORG
RED
WHT
RED
BLU BLU
BLU BLU
ORGORG
BLK
BRN
BLU
WHT
GRN
BLK BLK
GRN
WHTWHT
YEL YEL
BLK
WHT
BLK
BLK
WHT WHT
BLK
BLK
BLK
BLK
BRN
BLK
YEL
BLU
BLU
ORG
BLK
HEATER 2
12 OHMS
HEATER 1
12 OHMS

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6 Service Parts List
Specifications subject to change without notice.
Item Part No. Description
1 4025076 FAN,MOTORIZEDIMPELLER,PROCESSAIR
2 4033031-07 CAPACITOR,RUN,15MFD,370V,DRY,PROCESSAIR
3 4026784 COLLAR,SHORT6”REACTIVATIONDUCT(2PLACES)
4 4026860 FILTER,AIR,12X12X1,REACTIVATIONAIR
5 4026798 FAN,MOTORIZEDIMPELLER,REACTIVATIONAIR
6 4026799 HEATERCORE,PHXPOWERDRY385DPRO
7 4026777 TOPCOVER,DESICCANT385
8 4026898 THERMALOVERLOADCUT-OUTSWITCH,PROCESSAIR
9 4026830 CAPACITOR,RUN,8MFD,DRY,REACTIVATIONAIR
10 1970010 CONTROLRELAYSPST110VACCOIL25AMPCONTACTS
11 4026773 MOTOR,DESICCANTWHEEL
12 4026795 BELT,DRIVE,QUESTDESICCANT
13 4026772 WHEEL,DESICCANT
14 4028077 THERMALOVERLOADCUT-OUTSWITCH,REACTIVATIONAIR
15 4021475 FILTER,AIR,16X20X2,PROCESSAIR
16 4026194 SWITCH,ROCKER,DPST,ON-OFF
17 4025043 PLATE,SKID
18 4026304 WHEEL,PU12.00,GRAY(2PLACES)
19 4024078 COLLAR,DUCT,WIRE,5.75X12.00
1
2
3
4
9
10
11
12
5
6
14
13
7
8
15
16
17
19
18
Item Part No. Description
Not 4032315 CORD
Shown  
Not 4026922 GASKETANDBELT 
Shown  REPLACEMENTKIT

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Quest PowerDry 385D Pro Installation, Operation and Maintenance Instructions
Quest PowerDry 385D Pro Desiccant Dehumidier Limited Warranty
Warrantor:
Therma-StorLLC
4201LienRd
Madison,WI53704
Telephone:1-866-933-7486
Who Is Covered:Thiswarrantyextendsonlytotheoriginalend-useroftheQuestPowerDry385DPro
desiccantdehumidier,andmaynotbeassignedortransferred.
One Year Warranty:Therma-StorLLCwarrantsthat,forone(1)yeartheQuestPowerDry385DProdesiccant
dehumidierwilloperatefreefromanydefectsinmaterialsandworkmanship,orTherma-StorLLCwill,atits
option,repairorreplacethedefectivepart(s),freeofanycharge.
End-User Responsibilities:WarrantyservicemustbeperformedbyaServicerauthorizedbyTherma-Stor
LLC.Iftheend-userisunabletolocateorobtainwarrantyservicefromanauthorizedServicer,theend-user
shouldcallTherma-StorLLCattheabovenumberandaskfortheTherma-StorServiceDepartment.,which
willthenarrangeforcoveredwarrantyservice.Warrantyservicewillbeperformedduringnormalworking
hours.
Theend-usermustpresentproofofpurchase(lease)uponreQuest,byuseofthewarrantycardorother
reasonableandreliablemeans.Theend-userisresponsiblefornormalcare.Thiswarrantydoesnotcoverany
defect,malfunction,etc.resultingfrommisuse,abuse,lackofnormalcare,corrosion,freezing,tampering,
modication,unauthorizedorimproperrepairorinstallation,accident,actsofnatureoranyothercause
beyondTherma-StorLLC’reasonablecontrol.
Limitations and Exclusions:IfanyQuestPowerDry385DProDesiccantDehumidierpartisrepairedor
replaced,thenewpartshallbewarrantedforonlytheremainderoftheoriginalwarrantyperiodapplicable
thereto(butallwarrantyperiodswillbeextendedbytheperiodoftime,ifany,thattheQuestPowerDry
385DProDesiccantDehumidierisoutofservicewhileawaitingcoveredwarrantyservice).
UPONTHEEXPIRATIONOFTHEWRITTENWARRANTYAPPLICABLETOTHEQUESTPOWERDRY385D
PRODESICCANTDEHUMIDIFIERORANYPARTTHEREOF,ALLOTHERWARRANTIESIMPLIEDBYLAW,
INCLUDINGMERCHANTABILITYANDFITNESSFORAPARTICULARPURPOSE,SHALLALSOEXPIRE.
ALLWARRANTIESMADEBYTHERMA-STORLLCARESETFORTHHEREIN,ANDNOCLAIMMAYBE
MADEAGAINSTTHERMA-STORLLCBASEDONANYORALWARRANTY.INNOEVENTSHALLTHERMA-
STORLLC,INCONNECTIONWITHTHESALE,INSTALLATION,USE,REPAIRORREPLACEMENTOFANY
QUESTPOWERDRY385DPRODESICCANTDEHUMIDIFIERORPARTTHEREOFBELIABLEUNDERANY
LEGALTHEORYFORANYSPECIAL,INDIRECTORCONSEQUENTIALDAMAGESINCLUDINGWITHOUT
LIMITATIONWATERDAMAGE(THEEND-USERSHOULDTAKEPRECAUTIONSAGAINSTSAME),LOST
PROFITS,DELAY,ORLOSSOFUSEORDAMAGETOANYREALORPERSONALPROPERTY.
Somestatesdonotallowlimitationsonhowlonganimpliedwarrantylasts,andsomedonotallowthe
exclusionorlimitationofincidentalorconsequentialdamages,sooneorbothoftheselimitationmaynot
applytoyou.
Legal Rights:Thiswarrantygivesyouspeciclegalrights,andyoumayalsohaveotherrightswhichvary
fromstatetostate.