9
 Thecirculatorinstalledbetweenthetwoboilersmaybehookeduptoruncontinuouslyduring
theheatingseasonor,anadditionalS350control(notsupplied)couldbeinstalledtoturnitonandoff
automatically.Thiscontrolmustbeusedasa“closeonriseoftemperature”(jumperincoolingposi-
tion).
 HarmanStoveCompanyrecommendsthat1-1/4in.pipebeusedbetweenthetwoboilers.Also
recommendedisthattherstsectionofpipeoffofthetopoftheTridentBoilerbethreadedgalvanized
orthreadedblack-steelpipe.
 TheHarmanTridentBoilerissuppliedwithadualfunctionaquastat.TheA350isusedto
controltheautomaticdraftcontrolwhetheropen,toincreaseheat,orclosed,todecreaseheat.The
S350isusedasoverheatprotection.Sinceawoodorcoalreisstillproducingheatwhenthedraftis
closed,thisoverheatprotectionisrequired.YoucouldhavetheS350energizeacirculatingpumpor
azonevalveseparatefromtheheatingsystem,oritcouldbehookedupsothatitowstheheated
waterthroughoutthesystem.Eitherway,itmustbeabletoowawayfromtheboiler.
 Figure7showsatypicalschematicoftheTridentboilerasa“standalone”system.Note;the
crossoverpipe(#12)isnottotallynecessarybutisrecommendedtoprovidecirculationwithinthe
boilerwhiletheheatingsystemissatised.Thiswillensureaneventemperaturewithintheboiler.The
temperingvalveshown(#10)istopreventexcessivetemperatureofthedomesticwater.
FIG.7
Installation