An emergency shutdown control circuit is wired with a push-pull illuminated emergency pushbutton housed in a NEMA 1 enclosure with a clear Lexan cover and an engraved nameplate reading "BOILER EMERGENCY SHUT-OFF PUSH BUTTON". The control line interfaces with a 120-volt electrically held contactor to interrupt power to boiler B-1. Circuiting information is coordinated via floor plans and mechanical schedules.
N C TO BOILER B-1 R PROVIDE PUSH-PULL ILLUMINATED EMERGENCY PUSHBUTTON WITH CLEAR LEXAN COVER (TYPICAL) OUT IN INSTALL IN NEMA 1 ENCLOSURE BOILER EMERGENCY SHUT-OFF PUSH BUTTON DIAGRAMMATIC 1 BOILER EMERGENCY SHUT-OFF CONTROL WIRING DETAIL PROVIDE NAMEPLATE TO SAY "BOILER EMERGENCY SHUT-OFF PUSH BUTTON" SEE FLOOR PLAN FOR CIRCUITING INFORMATION SEE MECHANICAL SCHEDULE FOR CIRCUITING INFORMATION 120V ELECTRICALLY HELD CONTACTOR
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