Installation Guide

AirHarmony‐4200DC(InternalFilters)InstallationGuide
UGD‐D01196 AirspanCommercialandInternalUse 7
UL Information
‐TheequipmentmustbeproperlygroundedaccordingwithNECandotherlocalsafetycode
requirements.
‐RemindertoalltheBWAsysteminstallers:AttentiontoSection820‐40oftheNECwhichprovides
guidelinesforpropergroundingand, inparticular,specifiesthatthecablegroundshallbeconnected
tothegrounding
systemofthebuilding,asclosetothepointofcableentryasispractical.
‐AirHarmony‐4200DCisdesignedtooperateinenvironmentalconditionscomplyingwithIP66and
relevantstandards.
Lightning Protection
WARNING:Thefollowingnotesaregeneralrecommendationsforthesystem.Thewireless
equipmentshouldbeinstalledbyaqualifiedprofessionalinstallerandmustfollowlocalandnational
codesforelectricalgroundingandsafety.Failuretomeetsafetyrequirementsand/oruseofnon‐
standardpracticesandprocedurescouldresultinpersonalinjury
anddamagetoequipment.Adirect
lightningstrikemaycauseseriousdamageeveniftheseguidelinesarefollowed.
Alloutdoorwirelessequipmentissusceptibletolightningdamagefromadirecthitorinduced
currentfromanearstrike.Lightningprotectionandgroundingpracticesinlocalandnational
electricalcodesserve
tominimizeequipmentdamage,serviceoutages,andseriousinjury.Reasons
forlightningdamagearesummarizedas:
‐Poorlygroundedtower/antennasitesthatcanconducthighlightning strikeenergyintoequipment.
‐Lackofproperlyinstalledlightningprotectionequipmentthatcancauseequipmentfailuresfrom
lightninginducedcurrents.
Alightingprotectionsystemprovides
ameansbywhichtheenergymayenterearthwithoutpassing
throughanddamagingpartsofastructure.Alightningprotectionsystemdoesnotpreventlightning
fromstriking;itprovidesameansforcontrollingitandpreventingdamagebyprovidingalow
resistancepathforthedischargeofenergyto
travelsafelytoground.Improperlygrounded
connectionsarealsoasourceofnoisethatcancausesensitiveequipmenttomalfunction.
Agoodtowergroundingsystemdispersesmostofthesurgeenergyfromatowerstrikeawayfrom
thebuildingandequipment.
Tolimittheequipmentdamageduetoalightningstrike,
thefollowingpracticesarerecommended
forthewirelesssystem:
‐Providedirectgroundingfromtheantennamountingbracket,theradioandantennaand the
lightning/surgeprotectorstothesamegroundpoint atthebaseofthetoweroragroundbusonthe
building.Usethegroundin g screwsontheantenna
bracketandtheradioandantennafor
terminatingthegroundwires.
‐ThecircuitgroundmustbeconnectedtothesamegroundingsystemastheeNodeB.