providing a reliable normally-closed contact configuration

it cannot generate the vacuum needed to close the pressure switch

ensuring the burner circuit is interrupted if levels drop below safe thresholds

ensuring the solenoid valve maintains its MOPD performance

Siemens Industrial Controls 14BUB32BA Starter 321894-709 providing a reliable normally-closed contactThe Siemens 14BUB32BA is a heavy duty NEMA Size 00 motor starter designed for reliable control of three phase industrial motors. Built on a Frame Size A platform, this across the line magnetic starter features a versatile 110 120 220 240Vac dual voltage coil, making it compatible with standard 50 60Hz control circuits. This 3 pole unit is housed in a rugged NEMA 1 general purpose enclosure, providing essential protection for indoor applications. The