Quest Engineering DEH 3000R Manual
Installation, Operation and Maintenance Instructions
– Read and Save These Instructions –
This manual is provided to acquaint you with
the Quest DEH 3000R so that installation,
operation, and maintenance can proceed
successfully. Ultimate satisfaction depends
on the quality of installation and a thorough
understanding of this equipment.
Quest DRY150
Installation, Operation and Maintenance Instructions
4201 Lien Rd
Madison, WI 53704 1-800-533-7533
www.QuestProtect.com sales@thermastor.com
– Read and Save These Instructions –
Specications subject to change without notice.
TS-721
12/12
1
Quest DEH 3000R Digital Control
Quest DEH 3000R Digital Control:
• Digitalcontrolofrelativehumidity
(DigitalSet-Point)
• Fan/Filteroperation
• Programmableventilationtimer
• Sleekdesign
• Large,easy-to-readbacklitLCDdisplay
• Hightemperaturecut-out
• Dryoutcycletimer
• Autoreboot
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Quest DEH 3000R Installation, Operation and Maintenance Instructions
Table of Contents
1.Specications.................................................................. 3
2.Installation...................................................................... 3
2.1 ControlPanelInstallInstructions............................. 3
2.2 RemoteSensorInstallInstructions........................... 4
2.3 RemoteSensorUsage............................................. 4
2.4 RemoteSensorWiringInstructions.......................... 4
2.5 ControlPanelWiringInstructions............................ 5
2.6 AuxiliaryRelayOperation....................................... 6
2.7 Dehumidierlock-OFForlock-ON........................ 7
2.8 Testing.................................................................... 8
3.Operation........................................................................ 9
3.1 Display................................................................... 9
3.2 Setting.................................................................. 10
3.3 PersonalSettingsReferenceList............................ 10
3.4 On/OffandDisplaySettings.................................. 10
3.5 SettingClock........................................................ 10
3.6 AdjustingtheRelativeHumidity............................ 11
3.7 FanSettingandOperation.................................... 11
3.8 DamperOperationandSetting(Ventilation)......... 12
3.9 TemperatureCutoutProgramming........................ 14
Warranty............................................................... 15
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24VACYellowWire 24VACRedWire
Damper
WhiteWire
(Optional.See
warningbelow)
Dehumidier
BlueWire
Fan
GreenWire
ON-Detect
Common
OFF-Detect
NormallyOpen
Common
NormallyClosed
Optional
Use
Optional
Use
1. Specications
Part#(P/N) 4028531
Model: QuestDEH3000RDigitalControl
Electrical: 24VAC
MaxCurrent–
DMP,COMP,FAN: 1Ampeach
HumidityOperatingRange: 10–95%
HumidityControlRange: 35–70%
HumidityAccuracy:
±
5%
Output: 3Amps24VAC
Aux.RelayCapacity 5Amps
TempRange/ 30°-90°F,2%
Accuracy
Size 4.95"Lx1.06"Wx4.19"H
FOR HVAC INSTALLER ONLY:
2. Installation
InstalltheQuestDEH3000Rremotesensorinacentralarea
ofthestructurewhereitwillsensetherelativehumidityofthe
structureaccurately.Donotinstalltheremotesensorwhere
itmaynotaccuratelysensetherelativehumiditysuchasnear
HVACsupplyregisters,nearexteriordoorsandwindows,ornear
apoolorspa.Installinaccordancewithallapplicablecodesand
standards.
2.1 Control Panel Install Instruc-
tions
1. Separatethefrontpanelfromtheback
panelbydepressingthemiddlesections
ofthetopandbottomofthefrontpanel.
2. Locatethewiringaccessholeinthe
wallorotheratmountingsurface.
Placethebackpanelintopositionand
drilltheappropriatemountingholes.
3. Insertthescrewsandtighten.Levelas
necessary.
4. Maketheelectricalconnectionstothe
terminalsonthebackpanelasshownin
theapplicablewiringdiagram(seeSections2.2-2.4).
5. Testtheinstallation(seeSection2.5).
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2.2 Remote Sensor Install Instructions
This section is applicable only to customers who have purchased a remote
sensor package. The standard DEH 3000 controller does not offer remote
functionality.
2.3 Remote Sensor Usage
IMPORTANT!
•Theuseofspraypaintonthesensorhousingmaydamagethesensorandisnotcoveredbytheproduct
warranty.
Theremotesensingoptionisusedwhenaninstallationrequiresmountingthehumidityandtemperaturesensor
outoftheconditionedspaceorwhenitisdesiredtospecicallymonitorandcontroltheconditionsataparticular
locationinalargerconditionedspace.
Boththeneedforandlocationoftheremotesensorshouldbedeterminedbyaheating/coolingprofessional.
2.4 Remote Sensor Wiring Instructions
1.Routingsignalwires:
Youwillberequiredtosupplyandroute24gauge,4conductorsolidwire(2-linetelephonewire)betweenthe
DEH3000Rcontrollerandtheremotesensorlocation.•Donotrunwireslongerthan100ft.
•Theuseof24gaugewireisoptimal.Thinnergaugewiremaylimitsensordistance.Thickergaugeswillnotwork
withspliceconnectorsprovided.
•Avoidroutingparalleltohighvoltagewiring.
•Maintainadistanceof2ft.ormorefromhighvoltagelines.
2.Sensorconnection:
Thesensorcanbemountedtoawallorceilingsurface.Idealsensorlocationis5ft.abovetheoor.Wires
shouldexitthrougha½”diameterholeinthemountingsurfaceatthemountinglocation.Usetheprovidedsplice
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connectorstoconnectthe4wiresfromtheremotesensortotheuser-suppliedinterconnectwire.Besuretokeep
propercolorsattachedtoeachother.
3.Sensormounting:
Youwillneedtwoscrewstomountthesensor.Usethetwoslottedholestomountthebaseofthesensortothe
wallandthensnapthecoverintoplace.
4.Controllerconnection:
Usetheprovidedspliceconnectorstoconnectthe4wiresfromtheDEH3000Rtotheuser-suppliedinterconnect
wire.Besuretokeepthepropercolorsattachedtoeachother.
Continuewiththeinstallationasdescribedintherestofthismanual.
2.5 Control Panel Wiring Instructions
WARNING! DO NOT ALLOW THE YELLOW WIRE FROM THE QUEST DEHUMIDIFIER
TO CONTACT THE RED OR WHITE WIRES FROM THE QUEST DEHUMIDIFIER, DAMAGE TO THE 24-VOLT
TRANSFORMER WILL RESULT.
WARNING! THE QUEST DEH 3000R DIGITAL CONTROL OPERATES ON A LOW
VOLTAGE CIRCUIT (24 VAC) AND MUST NEVER CONTACT OR BE CONNECTED TO A HIGH VOLTAGE
CIRCUIT.
WARNING! UNPLUG THE QUEST DEHUMIDIFIER BEFORE WIRING THE DEH 3000R.
Theinstallermustsupplyalleldwiring,includingthewiringbetweentheQUESTdehumidierand
theQuestDEH3000R.SomeofthecontrolwiresleavingtheQUESTdehumidiermaynotbeused
insomecontrolsituationsandshouldbeleftdisconnectedwithwirenutstapedontothestripped
ends.
BesuretoconsulttheelectricalschematicinthismanualortheinternalelectricalboxoftheQuest
dehumidierbeforemakinganycontrolconnections.
WARNING! ONLY CONNECT THE WHITE WIRE TO THE CONTROL IF IT IS WIRED IN A
CIRCUIT THROUGH AN ELECTRIC DAMPER, OTHERWISE TRANSFORMER DAMAGE MAY RESULT.
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TheWhitewirecontrolstheoptionalmotorizeddamperthatcanbeinstalledintoafreshair
duct.Thisdamperprovidestheabilitytocontrolfreshairventilationusingtheventilation
timerfunctionoftheQuestDEH3000Randtheterminal
labeled“DMP” (SeeSection3.8).Leavethe“DMP”
terminalunusedifamotorizeddamperisnotused,and
capofftheWhitewirefromtheQuestdehumidier.
Standard wire colors for thermostats are as follows:
Description Color Terminal code
24VAC Red R
CallforHeat White WorW1
ForceFanOn Green G
Compressor
CallforCooling Yellow YorY1
2.6 Auxiliary Relay Operation
Itmaybedesirabletocoordinatefanoperationofthecentral
heating/coolingsystemwithdehumidierfanoperation.The
QuestDEH3000Rcontainsarelaythatprovidesthisability.
TherelayterminalslabeledNC,COMandNOoperate
accordingtothefollowingchart:
FAN COM to NO COM to NC
ON CONNECTED OPEN
OFF OPEN CONNECTED
Commonuses(assumingstandardthermostatwiringcolorsas
noted):
NO
COM
NC
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Lock-out the A/C during dehumidier fan operation
ThiswillturnofftheA/Cwheneverthedehumidierfanruns.
1.WiretheYellowthermostatterminaltotheNCterminalontheQuestDEH3000R.Theinstaller
mustsupplythewiringbetweentheQuestdehumidierandthecontrolpanel.Besuretosafelyroutethe
controlwirestopreventdamageduringinstallation.Be
carefulnottocrossthewireswhenconnectingtheQuest
dehumidierandtheremotecontrolpanelordamageto
thetransformermayresult.
2.RuntheYellowwirefromtheA/CunittotheCOM
terminalontheQuestDEH3000R.
Energize the A/C central fan during dehumidier fan
operation
ToautomaticallyruntheA/CFANwhenthedehumidier
fanruns.
1.AttachasecondGreenwiretotheGreenfanwire
terminalonthethermostat.
2.ConnectthenewGreenwiretotheCOMterminalonthe
QuestDEH3000R.
3.RunawirefromtheRedterminalonthethermostatto
theNO(NormallyOpen)terminalontheQuestDEH
3000R.
2.7 Dehumidier lock-OFF or lock-ON:
A/C sensor feature
Toautomaticallyactivateordeactivatethedehumidierwhentheairconditionerruns.
Activate dehumidication when the air-conditioner is running.
A voltmeter is required for the next steps to ensure the correct wiring from
the A/C transformer is used to set up the Lock-in dehumidier function.
1.ThecommonwirefromtheexistingA/Ctransformer(usuallyBlack)
mustbeattachedtothe“COM”sensorterminalbetween“ON-D”
and“OFF-D”ontheDEH3000R.
TIP: The common wire can be identied as the wire from the A/C
transformer that reads 0 volts between it and the Yellow air conditioning call
for cooling wire.The incorrect wire will give a 20 to 28 volt reading.
2.AnotherYellowwiremustbeaddedtothe
thermostatYellowterminalandruntothe“ON-D”
sensorterminalontheQuestDEH3000R.
A/C
Unit
Red
Green
Yellow
A/C
Unit
Red
Green
Yellow
A/C
Unit
Red
Green
Yellow
A/C
Unit
Red
Green
Yellow
ON-D
COM
OFF-D
TO A/C
TO A/C
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Deactivate dehumidication when the air-conditioner is running.
Avoltmeterisrequiredforthenextstepstoensurethe
correctwiringfromtheA/Ctransformerisusedtosetup
theLock-outdehumidierfunction.
1. ThecommonwirefromtheexistingA/C
transformer(usuallyBlack)mustbeattachedto
the“COM”sensorterminalbetween“ON-D”
and“OFF-D”ontheDEH3000R.
TIP: The common wire can be identied as the wire
from the A/C transformer that reads 0 volts between
it and the Yellow air conditioning call for cooling wire.
The incorrect wire will give a 20 to 28 volt reading.
2.AnotherYellowwiremustbeaddedtothethermostatYellowterminalandruntothe“OFF-D”
sensorterminalontheDEH3000R.
2.8 Testing
Verifythewiringconnections.
WARNING! ONLY CONNECT THE WHITE WIRE TO THE CONTROL IF IT IS WIRED IN
A CIRCUIT THROUGH AN ELECTRIC DAMPER, OTHERWISE TRANSFORMER DAMAGE MAY RESULT.
Aftercheckingthewiring,thisshorttestwillconrmproperhook-up.
1. InstallfrontcoveroftheQuestDEH3000R;connectthetoprst,thenthebottom.
2.PlugintheQUESTdehumidier.TheQuestDEH3000Rshouldpowerup.
3.TurntheQuestDEH3000RONbypressingthe“ON/OFF”button.
4.VerifydehumidicationoperationbyadjustingtheRH“SETPOINT”tobelowthe“%RH”
readingonthedisplay.Usethedown“RH”button.ConrmQuestfanandcompressor
operation.BothshouldbeONnow.
IncreasetheRH“SETPOINT”onthedisplaytowellabovethe“%RH”readingonthedisplay.Pressthe“RH”
uparrowtoincreasetheRH“SETPOINT”.
AfterrunningthedehumidiercompressortheQuestDEH3000Rappliesa10minuterestartlockoutonall
functions.Youwillhavetowaitfortherestartlockouttoexpire.
5.VerifyFAN-onlyoperation:
a.Checkthe“VENT”modeonthedisplay,itwilleitherbe“CLOSED”or“OPEN”.Ifitis“CLOSED”goto
thenextstep.Ifitis“OPEN”,pressandholdthe“VENT”keyuntil“OPEN”ashesonthedisplay,release
thekeyandthenpressitonemoretime.“OPEN”willchangeto“CLOSED”.Don’ttouchthekeysfor
severalsecondsuntilitstopsashing.
b.Pressandholdthe“FAN”buttonuntil“AUTO”beginsashingonthedisplay,releaseit,andthenpressit
againtoswitchthefantothe“ON”setting.
c.ConrmthattheQUESTfanisON.QuestcompressormustbeOFF.Ventilationdamper(ifused)should
beCLOSED.
6.VerifyoptionalVENToperation(ifelectricdamperisinstalled):
a.Pressandholdthe“FAN”buttonuntil“ON”ashesonthedisplay.
b.Releasethe“FAN”button,thenpressitagaintoswitchfanoperationto“AUTO”.
TO A/C
TO A/C
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c.Pressandholdthe“VENT”buttonuntil“CLOSED”ashesonthedisplay.
d.Releasethe“VENT”button,thenpressitagaintoswitchventmodeto“OPEN”.
e.ConrmthattheQuestfanisON.VentilationdamperisOPEN.QUESTcompressormustbeOFF.
f.Pressandholdthe“VENT”buttonuntilthe“OPEN”ashesonthedisplay.
g.Releasethe“VENT”button,thenpressitagaintoswitchventmodeto“CLOSED”.
Troubleshooting:
Ifanyfunctionsarenotworkingproperly,checkthewiringandconnections.Avoltmetermaybeusedacross
terminalstoverifyvoltage.Ifthereisconcernaboutthedehumidiernotoperatingproperly,theleadsexitingthe
QUESTdehumidiermaybeconnectedaccordingtothefollowingchart:
Wire connections Operation
Yellow&Blue Fan&Compressor
Yellow&Green FanOnly
WARNING!DO NOT MAKE ANY OTHER CONNECTIONS OR TRANSFORMER DAMAGE
MAY RESULT.
7.VerifyanyadditionaloptionalcontroloperationssuchasfaninterlockorA/Clockout.
8.ProceedtotheOperationsection.
FOR INSTALLER & OWNER:
3. Operation
Onthedisplayscreen,asolid“O”infrontofanyofthe3functions(SETPOINT,VENT,FAN)indicatesthefunction
isoperating.Aashing“O”indicatesitisinawaitmodeandnotavailableatthemoment.No“O”indicatesthe
functioniscurrentlyOFF.
Solid“O”before Indicates
SETPOINT Dehumidieron
VENT Freshairventilationcycleinprogress
FAN Fanon
Waitmodeisafactory-programmedtimeperiodmeanttopreventshortcycles.Thisextendsthelifeofthe
dehumidier.Whenaashing“O”isencountered,theunitisinwaitmodeandIT COULD BE UP TO 10
MINUTES BEFORE OPERATION RESUMES.
3.1 Display
•Wheneverthereispowertothecontrol,itwilldisplaythetime,theday,%relativehumidity,andtemperature.
•WhenthecontrolisactuallyswitchedON,the%RHsetpoint,fanstatus,runmode(programorhold),andfresh
airventilationstatusisdisplayed.
•Whenakeyispressedthedisplaywilllightforapproximately½aminute.
•TheTimeandDayisdisplayedatthetopofthescreen.
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•RHandTemperaturearedisplayedinrealtime.
•Asolid“O”beforetheSETPOINT,VENT,ORFANindicatesthefunctionis
operating.
•Aashing“O”beforetheSETPOINT,VENT,ORFANindicatestheunitis
inwaitmode.
3.2 Setting
Duringtheset-upprocess,ifyoumakeamistake,simplycontinue.Youcanalwaysgobacktoadjustthesettings.
Ifyouleavethecontrolaloneanddon’ttouchanybuttonsfor10seconds,thecontrolwillrememberany
changesmadeandreturntothenormaldisplayscreen,allowingyoutoproceedtothenextstep.
3.3 Personal Settings reference list
Please record your settings here.
Function Factory setting My Setting
SETPOINT(%RH) 50%
VENT Closed
FAN Auto
TEMPCUTOUT 99°
3.4 On/Off and display items
Pressthe“ON/OFF”buttontoturnthesystemONorOFF.
WhenthesystemisON,thesetpoint,fanstatus,operationmode(RUNor
HOLD),andfreshairventstatusisdisplayed.
WhenthesystemisOFF,thecontrolwilldisplaythetime,day,%RH,and
temperature.
Whentheunitisshipped,itisinmanual(hold)mode.
3.5 Setting Clock Time
1.Pressandholdthe“CLOCK”button.Thehourdisplaywillash.Release
thebutton.
2.Usetheup/down“RH”buttonstochangethevalue.
3.Pressthe“CLOCK”buttonagainandtheminutedisplaywillash.Use
the“RH”buttonstochangethevalue.
4.Pressthe“CLOCK”buttonagainandAMorPMwillash.Usethe“RH”buttonstochangethevalue.
5.Pressthe“CLOCK”buttonagainandthedaydisplaywillash.Usethe“RH”buttonstochangethevalue.
6.Don’ttouchanybuttonsforseveralsecondsuntilthedisplaystopsashing,thiswillsaveyoursettings.Ifyou
needtochangeanythinggobacktostep#1.
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