VIAIR VMS 444DB User manual

IMPORTANT SAFETY INSTRUCTIONS
CAUTION - To reduce risk of electrical shock:
- Donotdisassemble.Donotattemptrepairsormodications.Refertoqualiedservice
agenciesforallserviceandrepairs.
- Donotusethisproductinanareawhereitcanfallorbepulledintowaterorotherliquids.
- Donotreachforthisproductifithasfallenintoliquid.
- Use compressors with 12-Volt DC systems only.
- Thisproductshouldneverbeleftunattendedduringuse.
WARNING - To prevent injury:
- Neverallowchildrentooperatecompressors.Closesupervisionisnecessarywhenthis
compressor is being used near children.
- CompressorswillbecomeveryHOTduringandimmediatelyafteruse.Donottouchanypartof
the compressor with bare hands during and immediately after use.
- Donotusethisproductnearamesorexplosivematerialsorwhereaerosolproducts
are being used.
- Donotoperatethisproductwhereoxygenisbeingadministered.
- Do not pump anything other than atmospheric air.
- Neverusethisproductwhilesleepyordrowsy.
- Donotuseanytoolsorattachmentswithoutrstdeterminingmaximumairpressurefor
that tool or attachment.
- Neverpointanyairnozzleorairsprayertowardanotherpersonoranypartofthebody.
- Each444CaircompressorisequippedwithanAutomaticResetThermalProtector,andcan
automaticallyrestartafterthethermalprotectorresets.Alwayscutopowersourcewhen
thermalprotectorbecomesactivated.
- Wear safety glasses or goggles when installing this product.
- Useonlyinwellventilatedareas.
INSTALLATION
Pleasereadandfollowtheinstallationinstructionscarefullytoavoidinjuryordamagetothe
compressorandyourvehicle.
Eachofouraircompressorsandpartshavebeencarefullyproducedandpackaged.Beforeyou
begininstallation,pleasefamiliarizeyourselfwithInstallationPartsList(Fig.1)ofthismanual.
Guidelines for Selecting Mounting Location:
The selection of proper mounting location for your air compressor will help ensure a long and trouble
freecompressorservicelife.Pleasepaycloseattentiontothefollowingguidelines:
1. SelectaFLATANDSECURElocationwherethecompressorscanbemounted.
2. Tomaximizeaircompressorperformance,locatecompressorasCLOSETOTHEBATTERYas
possiblesothatthelengthofthepositiveleadwirerequiredisataminimum.
3. ChoosemountinglocationthatisascoolaspossibleandAWAYFROMHEATSOURCES.
 Thecoolertheambienttemperature,thelesschancethecompressorwilloverheat.
4. Thesecompressorsaremoisture&splashresistant,butNOTWATERPROOF.
Do not mount compressor in locations where the unit is likely to come in contact with water.
5. Forremoteltermounting(soldseparately),selectcompressormountinglocationwhereairline
canberoutedfromcompressorairinlettoremoteinletairlter.MakesureRemoteInletAirFilter
islocatedinadrylocation,awayfromtheelements.
7. Ifitisnecessarytomountaircompressorsfurtherawayfromthebattery,suchasinside
 yourvehicleoronthechassisofapickup,useaminimum8AWGpositiveleadwirefor
remote installation.
8. Donotmountcompressornearareaswhereammableliquidsarestored.
9. VIAIR®suggeststheuseofa40-Ampratedrelaywitheachcompressor(notincludedwiththiskit).
10.VIAIR®alsosuggeststheuseofa200PSImaximumpressureswitchtoregulateon&o
pressures.Pressureswitchisnotincludedwiththiskit.
USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS

MOUNTING AND WIRING
1. Disconnectgroundcablefromvehicle'sbattery.
2. Temporarily position the air compressor in the location where it will be mounted.
3. Routegroundwiretothenegativepostofthebatteryortoanappropriategroundingpoint
and cut ground wire to length as needed.
4. Mounteachaircompressorwiththefoursetsofbolts,nuts,washers,andlockingwashers
provided.(SeeFig.2forMountingInstructions).Useofthreadsealantisrecommended.
5. Youraircompressorscomewithheavydutyheat-resistant
 leaderhosewith1/4"NPTttings.Thisleaderhoseisdesignedtoprolongthelifeof
 yourairline.Donotremovetheleaderhosesfromtheaircompressors.
6. IMPORTANT:Pleasenote,theleaderhosethatcomeswithyourcompressorhasabuilt-in
 inlinecheckvalve.DoNotremoveinlinecheckvalvefromleaderhose.
7. Connectcompressorpositiveleadwiretooneoftheleadsofyourpressureswitch.
8. Makesurethatyourcompressorsetupisproperlyfused.Both444Ccompressorswillpull
 46-Ampsatpeakdraw.
9. Alwayslocatefuseascloseaspossibletopowersource.
10.Beforeconnectingtopowersource,re-checktomakesurethatallconnections
are made properly.
11. Connect and test compressor system by running the
compressor for a short time to build up pressure in your air tank.
12.Onceairpressurereachespresetcutoutpressureofyourpressureswitch(pressureswitchnot
included)thecompressorwillshuto.Inspectallairlineconnectionsforleakswithsoapand
watersolution.Ifaleakisdetected,theairlinemaynotbecutsquarelyorpushedallthewayin.
Repairconnectionsasneeded.
(Fig. 1) 444C Compressor Installation Parts List:
A. MountingBolts(4pcs)x2
B. FlatWashers(8pcs)x2
C. LockingWasher(4pcs)x2
D. Nuts(4pcs)x2
E. DirectInletAirFilter(1pc)x2
F. ReplacementFilterElement(1pc)x2
(Fig. 2) Compressor
Mounting Hardware
B. MountingBolt
C. FlatWasher
D. LockingWasher
E. Nut
K. VibrationIsolator
USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS
B
C
C
D
E
K
B
AC D EF

OPERATING INSTRUCTIONS
1. IMPORTANT:AlwaysoperatethecompressorsatorbelowtheMAXIMUMPRESSURERATING
ofthecompressor(200PSI).
2. AlwaysobservetheMAXIMUMDUTYCYCLEoftheaircompressor.RefertoCompressor
ApplicationsandSpecicationsSectionsofthismanualfordetails.Operationexceeding
maximumpressureratingsand/ordutycyclewillresultindamagetotheaircompressor.
3. YouraircompressorsareequippedwithAUTOMATICTHERMALOVERLOADPROTECTORS.
Thisfeatureisdesignedtoprotecttheaircompressorfromoverheatingandcausingpermanent
damage.Thethermaloverloadprotectorwillautomaticallycutpowertoyouraircompressor
shouldtheinternaloperatingtemperatureoftheaircompressorriseabovesafelevelsduring
excessiveuse.
4. Shouldatanytimeduringuse,youraircompressorsautomaticallyshuto,donotattempt
torestartthem.Cutpowertotheaircompressor.Theautomaticthermaloverloadprotector
willautomaticallyresetwheninternaltemperatureoftheaircompressordropsbelowsafelevels.
Afterallowingaircompressortocooloforabout30minutes,youcansafelyresumeuseofthe
air compressor.
5. Topreventdischargeofyourvehicle'sbattery,werecommendthatyoukeepthevehicle'sengine
running while operating air compressors.
6. ONLYOPERATEAIRCOMPRESSORSINWELL-VENTILATEDAREAS.
7. Compressorperformanceisenhancedwhenoperatingcompressorwithvehicle'senginerunning.
8. INSTALLATIONTIP:
Alwaysplumbyoursystemusingaseparatetankportforeachcompressorleaderhose.
 Thiscanimproveowperformance.
MAINTENANCE & REPAIRS
1. Periodicallycheckallelectrical,ttingsconnections.Cleanandtightenasneeded.
2. Periodicallycheckallmountingscrews.Tightenasneeded.
3. ReplaceAirFilterElementperiodically.Replacementfrequencydependsonoperatingfrequency
andoperatingenvironment.Forfrequentuseindustyenvironments,werecommendthatyou
replaceairlterelementonceamonth.
4. Regularlycleandustanddirtfromcompressorcoolingnsandmotorhousing.
5. Youraircompressorisequippedwithapermanentlylubricated,maintenance-freemotor.
 Nevertrytolubricatethecompressor.
6. AllrepairsshouldbeperformedbyManufacturerorManufacturer'sAuthorized
 ServiceAgenciesonly.
CAUTION:
Nevertouchtheaircompressororttingsconnectedtotheaircompressorwithbarehandsduring
orimmediatelyafteruse.Theleaderhoseandttingsconnectedtoleaderhosewillbecomevery
HOTduringandafteruse.Ifnecessary,wearheatresistantglovestohandlettings,airline,and
leader hose.
SPECIFICATIONS
•PartNo.444DB/Dual444CHighPerformanceCompressors/StealthBlack(CECertied)
•PartNo.444DC/Dual444CHighPerformanceCompressors/Chrome(CECertied)
MotorVoltage: 12-Volts
Max.-Amperage-Single: 23-Amps
Max.-Amperage-Combined: 46-Amps
MotorType: PermanentMagnetic
Horsepower: 1/4
Max.WorkingPressure: 200PSI
Max.DutyCycle(@72°F&100PSI): 100%
MinutesOn/O(@72°F&100PSI): 1HourRunTime
Max.DutyCycle(@72°F&200PSI): 50%
Max.RestartPressure: 200PSI
Max.AmbientTemperature: 158°F
Min.AmbientTemperature: -40°F
Auto.ResetThermalProtection: Yes
IngressProtectionRating: IP67
USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS

COMPRESSOR APPLICATION GUIDE
Toensurethatyougetthehighestlevelofsatisfactionfromyourcompressor'sperformance,referto
information below:
VIAIR®COMPRESSOR REFERENCE CHART
COMPRESSORSERIES MAX.WORKINGPRESSURE DUTYCYCLE
(100PSI@72°F)
090SERIES 120PSI 9% 
092SERIES 120PSI 9%
095SERIES 120PSI 9%
097SERIES 130PSI 10%
098SERIES 130PSI 10%
100SERIES 130PSI 15%
250IGSERIES 150PSI 100%
275SERIES 150PSI 25%
280SERIES 150PSI 30%
310SERIES 200PSI 100% 
  55%@200PSI
325SERIES 150PSI 33%
330IGSERIES 150PSI 100%
350SERIES 150PSI 100%
380SERIES 200PSI 100% 
  55%@200PSI
400SERIES 150PSI 33%
420SERIES 150PSI 33%
425SERIES 175PSI 33%@175PSI 
  50%
444SERIES 200PSI 100% 
  50%@200PSI
450SERIES 150PSI 100%
450IGSERIES 150PSI 100%
460SERIES 150PSI 100%
480SERIES 200PSI 100% 
  50%@200PSI
485SERIES 200PSI 100% 
      100%@200PSI
ABOUT COMPRESSOR DUTY CYCLE:
Dutycyclereferstotheamountoftimeacompressorcanbeoperatedinagiventimeperiodat100
PSI,andastandardambienttemperatureof72°F.Itiscommonlyexpressedinpercentageformat:
Compressorontime÷(ontime+otime)=DutyCycle%.
ONE-HOUR DUTY CYCLE MINUTES ON /
(100PSI@72°F) MINUTES OFF
 9% 5Min.On/55Min.O
 10% 6Min.On/54Min.O
 15% 9Min.On/51Min.O
 20% 12Min.On/48Min.O
 25% 15Min.On/45Min.O
 30% 18Min.On/42Min.O
 33% 20Min.On/40Min.O
 50% 30Min.On/30Min.O
100% 1HourRunTime
NOTE:Allcompressors,regardlessofrateddutycycle,requiresucientresttimeinbetweencycles
toallowforpartialorcompleteheatdissipation.Heatdissipationratesmayvarydependingon
ambient temperatures and operating conditions.
ABOUT RATED WORKING PRESSURE:
Toensuretroublefreeservicelifeofyourcompressor,alwaysoperatecompressorwithinrated
workingpressureofthecompressor.Neveruseapressureswitchwithahighercut-opressurethan
compressor'sratedworkingpressure.
USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS

TROUBLESHOOTING GUIDE:
CAUTION: NEVER DISASSEMBLE COMPRESSOR WHILE
COMPRESSOR IS PRESSURIZED.
USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS
POSSIBLECAUSE(S)PROBLEM CORRECTIVEACTION
Tank pressure drops when
compressor(s)shuto
1.Loosedraincock
2.Checkvalveleaking
3.Looseconnections
1. Tighten drain cock
2.Replacecheckvalveor
compressor(s)
3. Check all connections with
soap and water solution and
tighten
Compressor runs
continuouslyandairow
lower than normal
1.Excessiveairusage
2.Looseconnections
3. Worn piston ring or inlet
valve.
4.Cloggedairlterelement
1. Decrease air usage
2. Check all connections with
soap and water solution and
tighten.
3.Repairorreplacecompressor
4.Replaceairlterelement
Compressor runs
continuously causing safety
valve(ifequipped)toopen
1.Badpressureswitch
2.Defectivesafetyvalve
1.Replacepressureswitch
2.Replacesafetyvalve
Excessivemoisturein
discharge
1.Excessivewaterinairtank
2.Highhumidity
1.Draintank,tilttanktodrain.
Draintankmorefrequently
2.Movecompressortoarea
withlesshumidity,oruseair
linelter.
Compressor will not run 1.Nopower,orpowerswitch
inOFFposition
2.Blownfuse
3.Motoroverheats
4.Faultypressureswitch.
1.Makesurecompressor
switchisON
2. Disconnect compressors
frompowersource,replace
fuse.(RefertoSpecications
section for correct fuse-
Amperage.)
3.Letcompressorscoolofor
about 30 minutes to allow
thermaloverloadswitchreset.
4.Replacepressureswitch
Thermaloverloadprotector
cuts out repeatedly
1.Lackofproperventilationor
ambient temperature too high
2.Compressorvalvesfailed
1.Movecompressortowell
ventilatedarea,orareawith
lower ambient temperature
2.Repairorreplacecompressor
Excessiveknockingor
rattling
1.Loosemountingbolts
2. Worn bearing on eccentric or
motor shaft
3. Cylinder or piston ring is worn
1. Tighten mounting bolts
2.Repairorreplace
compressor
3.Repairorreplace
compressor

USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS
Wiring Diagram:
(Relays, Pressure Switch & Fuse Not Included)
DUAL “C” MODEL
COMPRESSOR WIRING DIAGRAM
15 Edelman Irvine, CA 92618 949-585-0011 www.viaircorp.com
87
86
30
85 To Keyed
Power Source
12V 40A
Relay
Pressure
Switch
87
86
30
85
+-
Battery
12V 40A
Relay
Fuse
Rev.1
@60A

USER MANUAL
DUAL 444C HIGH PERFORMANCE COMPRESSORS
LIMITED WARRANTY:
VIAIR®Corporationwarrantsthisproduct,whenproperlyinstalledandundernormalconditionsofuse,tobefreefromdefectsin
workmanshipandmaterialsforaperiodofoneyearfromitsoriginaldateofpurchase.Toreceivewarrantyserviceorrepair,please
contactVIAIR®Corporation.
Returnsshouldbemadewithinoneyearofthedateofpurchase,afteraReturnGoodsAuthorization(RGA)numberhasbeen
assignedbyVIAIR®Corporation.ToobtainRGA,faxacopyofyourreceiptto(949)585-0188.Forcompletewarrantydetails,please
visit:www.viaircorp.com/warranty
PLEASE NOTE:
THISWARRANTYCOVERSPRODUCTDEFECTSONLY;ITDOESNOTCOVERINCIDENTALORCONSEQUENTIALDAMAGES
ASRESULTOFMISUSEORABUSE.
ThisManualisproprietarytoVIAIR®Corporationandnoownershiprightsareherebytransferred.NopartoftheManualshallbe
used,reproduced,translated,converted,adapted,storedinaretrievalsystem,communicatedortransmittedbyanymeans,forany
commercialpurpose,includingwithoutlimitation,sale,resale,license,rentalorlease,withoutthepriorexpresswrittenconsentofVIAIR®.
VIAIR®doesnotmakeanyrepresentations,warrantiesorguarantees,expressorimplied,astotheaccuracyorcompletenessofthe
Manual.UsersmustbeawarethatupdatesandamendmentswillbemadefromtimetotimetotheManual.Itistheuser'sresponsibility
todeterminewhethertherehavebeenanysuchupdatesoramendments.NeitherVIAIR®noranyofitsdirectors,ocers,employees
oragentsshallbeliableincontract,tortorinanyothermannerwhatsoevertoanypersonforanyloss,damage,injury,liability,costor
expenseofanynature,includingwithoutlimitationincidental,special,directorconsequentialdamagesarisingoutoforinconnection
withtheuseoftheManual.
15EDELMAN•IRVINE,CA92618
TEL:(949)585-0011•FAX:(949)585-0188
www.viaircorp.com
R1-030823
©VIAIR®Corporation