Bermuda Gas Fired Steam Boiler Installation Manual
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X Wiring
1)120VoltWiring-Theboilershouldbeprovidedwithitsown15Abranchcircuitwithfuseddisconnect.All120voltcon-
nectionsaremadeinsidethejunctionboxontheleftsideoftheboiler.Removethetransformertogainaccesstothisbox
(alsoseeFigures16through17):
• Hot(“black”)-Wirenuttoblacktransformerlead
• Neutral(“white”)-Wirenuttowhitetransformerlead
• Ground(“green”orbare)-Groundscrewinsidejunctionbox.
2)ThermostatWiring-Followthermostatmanufacturerinstructions.Toinsureproperthermostatoperation,avoidinstalla-
tioninareasofpooraircirculation,hotspots(nearanyheatsourceorindirectsunlight),coldspots(outsidewalls,walls
adjacenttounheatedareas,locationssubjecttodrafts).ProvideClassIIcircuitbetweenthermostatandboiler.Connect
thermostatwireleadstothebluetransformerleadandbrownrelayleadinsidethejunctionbox.Settheheatanticipator
to 0.2A.
Feeder Wiring for Boilers Equipped with Hydrolevel CG400A Low Water Cut-offs
1)UsingHydrolevelVXT-24TWO-WIREfeeder-Donotalterfactoryboilerwiring.ConnectVXT-24toCG400Aasfol-
lows:
• ConnecttheBLACKleadonthefeedertoterminalAontheLWCO
• ConnecttheWHITEleadonthefeedertoterminal2ontheLWCO
2)UsingHydrolevelVXT-24THREE-WIREfeeder-Donotalterfactoryboilerwiring.ConnectVXT-24toCG400Aas
follows:
• ConnecttheBLACKleadonthefeedertoterminal1ontheLWCO
• ConnecttheWHITEleadonthefeedertoterminal2ontheLWCO
• ConnecttheREDleadonthefeedertoterminalAontheLWCO
3)UsingMcDonnell&MillerWF2-U-24feeder-Donotalterfactoryboilerwiring.ConnectWF2-U-24toCG400Aasfol-
lows:
• ConnectterminalW onthefeedertoterminalA ontheLWCO
• ConnectterminalNonthefeedertoterminal2ontheLWCO
• ConnectterminalHonthefeedertoterminal1 ontheLWCO
CAUTION
DonotattempttoconnectaMcDonnell&Millermodel#101Afeeder,orotherfeederwithoutadelay,toaBSIboiler
equippedwithaHydrolevelCG400lowwatercutoff.Doingsocoulddestroytheboilertransformerand/oroodthesys-
tem.
WARNING
Allwiringandgroundingmustbedoneinaccordancewiththeauthorityhavingjurisdictionor,intheabsenceofsuch
requirements,withtheNationalElectricalCode(ANSI/NFPA70)