DualLite LSN - 106. AC Connections; 106.1 AC Wiring Preparations

18
106. AC Connections
CAUTION
A. AllLSNinvertersystemunitscontainhazardousACandDCvoltages.Becauseofthesevoltages,aqualied
electrician must install the LSN inverter system, AC line service, and batteries. The electrician must install the AC
line service according to local, state and NEC codes and must be familiar with batteries and battery installation.
B. Before installing, maintaining, or servicing the unit, always remove or shut off all sources of AC and DC power and
shut off the LSN inverter system. Disconnect AC line input at the service panel and turn off the Main DC Switch,
the Main AC Switch, and the Master Switch to make sure the unit will not supply output voltage.
C. WheneverACand/orDCvoltageisapplied,therewillbeACvoltageinsidetheLSNinvertersystemunit;the
unitcansupplypowerfromAClineorfromitsbatteries.Toavoidequipmentdamageorpersonalinjury,always
assume that there may be voltage inside the LSN inverter system.
D. Removerings,watches,andotherjewelrybeforeinstallingtheACwiring.Alwayswearprotectiveclothingandeye
protectionanduseinsulatedtoolswhenworkingnearbatteries.Wheneverservicinganenergizedunitwiththe
insidepanelopen,electricshockispossible;followalllocalsafetycodes.TESTBEFORETOUCHING!
E. Before installing an external bypass switch, make sure that both the bypass switch and the AC disconnect switch
are off.
F. Toreducetheriskofreorelectricshock,installtheLSNinvertersystemandthebatteriesinatemperature-
controlled and humidity-controlled indoor area free of conductive contaminants. See Section 103 for operating
environmentspecications.
Preparations
1. Open the circuit breaker access door. Make sure all breakers are in the off position.
2. Make sure the LSN inverter system input and output voltages are correct for the particular application. Remember
that the LSN system provides single-phase power only.
3. The input circuit breaker in the input service panel provides the means for disconnecting AC to the LSN inverter
system. If using a bypass switch, the bypass enclosure also includes a separate AC Disconnect switch. Only
authorizedpersonsshallbeabletodisconnectACtotheunit.(SeeNEC700-20and700-21.)Bypassswitches
withACDisconnecthavehandlesthatcanacceptalocktorestrictcontroltoauthorizedpersons.Ifusingtheinput
circuitbreakertodisconnectAC,makesurethatonlyauthorizedpersonshavecontrolofthecircuitbreakerpanel
tomeettherequirementsofNEC700-20.
4. If installing a bypass switch, use the installation and wiring instructions supplied with the bypass switch.
NOTE: Systemsnotusingabypassswitchmayhaveoptionaloutputcircuitbreakersand/oranormallyoffrelay.
CAUTION
 Topreventelectricalshockorequipmentdamage,forallunits,withandwithoutabypassswitch,makesurethe
MasterSwitch,theMainACSwitch,theMainDCSwitchontheinverterandthebypassswitch(ifapplicable),all
output circuit breakers, and the AC input at the service panel are all off before making AC connections to the LSN
inverter system.