Installation Instructions

ACU-150
15A
ACU-200
20A
ACU-300
15A
ACU-400
40A
Grounding—Dedicateddrainwire
required
Thisproductincludesadedicateddrainconductor
(screen)forconnectiontoavessel'sRFground
point.
ItisimportantthataneffectiveRFgroundis
connectedtotheunit.Theunitcanbegrounded
byconnectingthedrainconductor(screen)tothe
vessel'sRFgroundpoint.Onvesselswithoutan
RFgroundsystemthedrainconductor(screen)
shouldbeconnecteddirectlytothenegativebattery
terminal.
Thedcpowersystemshouldbeeither:
•Negativegrounded,withthenegativebattery
terminalconnectedtothevessel'sground;or
•Floating,withneitherbatteryterminalconnected
tothevessel'sground.
Ifseveralitemsrequiregrounding,theymayrst
beconnectedtoasinglelocalpoint(e.g.within
aswitchpanel),withthispointconnectedviaa
single,appropriately-ratedconductor,tothevessel’s
commonRFgroundpoint.
Implementation
Thepreferredminimumrequirementforthepathto
groundisviaaattinnedcopperbraid,witha30A
rating(1/4inch)orgreater.Ifthisisnotpossible,an
equivalentstrandedwireconductormaybeused,
ratedasfollows:
•forrunsof<1m(3ft),use6mm
2
(#10AWG)or
greater.
•forrunsof>1m(3ft),use8mm
2
(#8AWG)or
greater.
Inanygroundingsystem,alwayskeepthelengthof
connectingbraidorwiresasshortaspossible.
References
•ISO10133/13297
•BMEAcodeofpractice
•NMEA0400
Powerdistribution—ACU
Recommendationsandbestpractice.
•TheproductisNOTsuppliedwithapowercable.
PleaserefertothePoweranddrivecables
sectionforpowercablerequirements.
•RefertothePowerconnectionsectionformore
informationonhowtoidentifythewiresinyour
product’spowercable,andwheretoconnectthem.
•Seebelowformoreinformationonimplementation
forsomecommonpowerdistributionscenarios.
Important:
Whenplanningandwiring,takeintoconsideration
otherproductsinyoursystem,someofwhich(e.g.
sonarmodules)mayplacelargepowerdemand
peaksonthevessel’selectricalsystem.
Note:
Theinformationprovidedbelowisforguidance
only,tohelpprotectyourproduct.Itcovers
commonvesselpowerarrangements,butdoes
NOTcovereveryscenario.Ifyouareunsurehow
toprovidethecorrectlevelofprotection,please
consultanauthorizedRaymarinedealerora
suitablyqualiedprofessionalmarineelectrician.
Implementation—directconnectiontobattery
•Theunitmaybeconnecteddirectlytothevessel's
battery,viaasuitablyratedfuseorbreaker.
•IftheunitdoesnotrequireaseparateRFGround
(drain)connection,onlythepowercable’sredand
blackwiresneedtobeconnected.
•YouMUSTtasuitablyratedfuseorbreaker
betweentheredwireandthebattery’spositive
terminal.
•Refertotheinlinefuseratingsprovidedinthe
product’sdocumentation.
A
BatteryconnectionscenarioA:suitableforavessel
withacommonRFgroundpoint.Inthisscenario,if
yourproductrequiresaseparateRFGround(drain)
connectionthenitshouldbeconnectedtothevessel’s
commongroundpoint.
B
BatteryconnectionscenarioB:suitableforavessel
withoutacommongroundingpoint.Inthiscase,if
yourproductrequiresaseparateRFGround(drain)
connectionthenitshouldbeconnecteddirectlytothe
battery’snegativeterminal.
Implementation—connectiontodistribution
panel
30