Marvair S/07846 Controller 320734-701 it features a built-in 1
Baker’s notes & crumb story
Description
Marvair S 07846 Controller 320734 701 it features a built in 1 it features a built in 1 NO (Normally Open) auxiliary contact for status monitoring or interlock circuits it generally requires a minimum pressure differential (typically 5 PSI) to open properly