Chamberlain HD620EV Manual page 24

Installation
STEP 13 Install the ProtectorSystem® (continued) FLOOR ,NSTALLAT,ON
wALL ..STAL T.O.
Ifadditionalclearanceis neededan extensionbracket(not provided)or woodblockscan be used,Make
sureeach brackethasthe sameamountof clearancesothey willalign correctly,
1, Positionthe sensorbracketagainstthewall withthecurved armsfacingthedoor, Makesure
there is enoughclearancefor the beamto be unobstructed, M arkholes,
2, Drill 3/16inchpilot holesfor each sensorbracketand attachthe sensorbracketstothe wall
usinglagscrews(notprovided),
3, Slidethe carriagebolt intothe sloton each sensor,
4. Inserttheboltthrough the hole inthe sensorbracketand attachwiththe wingnut.The lenses
on bothsensorsshouldpoint towardeach other,Makesurethe lensis not obstructed bythe
sensorbracket,
' _ /Notprov,ded/
°_¢_1 Nomorethan
_! 61nches(15cm)
3
Carriage Bolt
Lens ,_ 1/4"-20xl/2"
Usean extensionbracket(not provided)or woodblockto raisethe sensorbracketif needed,
1, Carefullymeasurethe positionof bothsensorbrackets sothey will bethe same distancefrom
the wall and unobstructed,
2, Attachthesensorbracketstothe floor usingconcreteanchors(notprovided),
3, Slide the carriagebolt into the sloton each sensor,
4, Inserttheboltthrough the hole in thesensorbracketand attachwiththewing nut,The lenses
on bothsensorsshouldpointtoward eachother, Makesurethe lensis notobstructedbythe
sensor bracket,
provided)
Carriage Bolt
1/4"-20xl/2"
Nut
1/4"-20
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