Installation Guide

To connect the strings to the DC Safety Unit:
1. Equipmentgrounding:ConnecttheDCequipmentgroundconductortotheequipmentgrounding
terminalblockintheDCSafetyUnit.
NOTE
FunctionalElectricalEarthingofDC-sidenegativeorpositiveisprohibitedbecausetheinverter
hasnotransformer.Equipmentgroundingofexposedconductivesurfacesinthearrayisrequired
pertheNEC.
2. InserttheDCconduitintotheDC-sideopeningontheDCSafetyUnit(leftsideatthebottomofthe
DCSafetyUnit).
3.
ConnecttheDCwirestotheDC+andDC-terminalblocks,accordingtothelabelsontheterminals,
connecttwowires(DC+andDC-)perstring:
a. Useastandardflat-bladescrewdrivertoconnectthewirestothespring-clampterminals.The
screwdriverbladeshouldfitfreelyintheterminalopening.Toolargeabladecancracktheplastic
housing.
b. Insertthescrewdriverandfirmlytiltittopressthereleasemechanismandopentheclamp.
c. Insertthewireintothetopopening.
d. Removethescrewdriver–thewireisautomaticallyclamped.
CAUTION!
EnsurethatthePlus(+)wireisconnectedtothe+terminalandthattheMinus(-)wireisconnectedto
theMinus(-)terminalconnector.
ATTENTION!
Veillez à ce que le câble Plus (+) soit connecté au terminal + et que le câble - soit connecté au
connecteur terminal.
NOTE
ForsystemswithfourPVstringsperunitormore,fusesmayneedtobeinstalledin
boththepositiveandnegativeconductorsasrequiredbyNECArticle690.9.Formore
information,refertotheTechnicalNote“StringFusingRequirementsinSolarEdge
Systems”athttp://www.solaredge.com/files/pdfs/string_fusing_requirements.pdf.
NOTE
SolarEdge'sfixedinputvoltagearchitectureenablestheparallelstringstobeofdifferentlengths.
Therefore,theydonotneedtohavethesamenumberofpoweroptimizers,aslongasthelengthof
eachstringiswithinthepermittedrange.
5. ClosetheDCSafetyUnitcover:Attachtheswitchcoverandsecureitbytighteningthefourscrews
withatorqueof1.20.9ft.*lb.
6. Ensureproperconduitsealing;inspecttheentireconduitrunandusestandardconduitsealantsto
avoidwaterpenetration.
Chapter 4: Connecting the AC and the Strings to the Safety Switch
Single Phase Inverter with HD-Wave Technology Installation MAN-01-00306-1.1
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