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Operation
Automatic Operation Sequence
Thegenerator'scontrolpanelhousesalogiccontrolcircuit
board.Thiscontrolboardconstantlymonitorsutilitypower
sourcevoltage.Shouldthatvoltagedropbelowapresetlevel,
controlboardactionwillsignaltheenginetocrankandstart.
Whenutilitysourcevoltageisrestoredaboveapreset
voltagelevel,theengineissignaledtoshutdown.
Theactualsystemoperationisnotadjustableandissequenced
bysensorsandtimersonthecontrolboard,asfollows:
Utility Voltage Dropout Sensor
• Thissensormonitorsutilitysourcevoltage.
• Ifutilitysourcevoltagedropsbelowabout70percent
ofthenominalsupplyvoltage,thesensorenergizesa
10secondtimer.Thetimerisusedto'sense'brown-outs.
• Oncethetimerhasexpired,theenginewillcrankand
start.
Utility Voltage Pickup Sensor
Thissensormonitorsutilitypowersupplyvoltage.Whenthat
voltageisrestoredabove80percentofthenominalsource
voltage,atimedelaystartstimingandtheenginewillgoto
enginecool-down.
Engine Cool-down Timer
• Whentheloadistransferredbacktotheutilitypower
source,theenginecool-downtimerstartstiming.
• Thetimerwillrunforaboutoneminute,thenthe
generatorwillstop.
• Minimumengineruntimeis5minutes.
0
Automatic Operation
Toselectautomaticoperation,dothefollowing:
1. Setthemaindistributionpanelcircuitbreakerthat
sendsutilityvoltagetothetransferswitchtoON.
. Setthegenerator'smaincircuitbreakertoitsON
position.
3. SetthesystemswitchtoAUTO.
CAUTION
WiththesystemswitchsettoAUTO,theengine
maycrankandstartatanytimewithoutwarning.
Suchautomaticstartingnormallyoccurswhen
utilitysourcevoltagedropsbelowapresetlevel
orduringthenormalexercisecycle.
•
Topreventpossibleinjurythatmaybecausedbysuch
suddenstarts,alwayssetthesystemswitchtoOFF.
•
Removethe15Ampfusebeforeworkingonoraround
thegeneratorortransferswitch.
Checking Automatic Operation
Tocheckthesystemforproperautomaticoperation,proceed
asfollows:
1. TurnOFFthemaindistributionpanelcircuitbreaker
sendingpowertotheautomatictransferswitch.
Theenginewillcrankandstartwhentheutilityvoltagedrops
outandthesensorhastimedout.Letthesystemgothrough
itsentireautomaticoperationsequence.
. Withthegeneratoroutputsupplyingitsloads,turnON
themaindistributionpanelcircuitbreakerthatsupplies
utilitypowertotheautomatictransferswitch.
3. Theautomatictransferswitchwilltransferloadsback
totheutilitypowerafter5minuteminimumruntime
andutilityisrestored.
4. Thegeneratorwillrunforanadditionaloneminutefor
enginecooldown,thenshutdown.
NOTE:Ifutilityisrestoredandgeneratordoesnotshutdown
after10minutes,setsystemswitchtoOFFandcontactyour
installerorlocalservicecenter.
Thiscompletesthetestproceduresforautomaticoperation.
Thehomegeneratorwillnowstartautomaticallywhenutility
powerislostandwillsupplypowertothetransferswitch.
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