🔍 Key Concepts

• Boiler safety interlocks on automatic auxiliary boilers • Relationship between water level and risk of overheating furnace or tubes • Difference between alarms (warning) and automatic shutdown trips

💭 Think About

• Which condition would most quickly create a dangerous situation for the furnace or boiler tubes if fuel firing continued? • Which of these are typically monitored for alarms only, and which are used as hard-wired trips that cut off the fuel? • Think about what the burner management system is designed to prevent when nobody is manually watching the boiler all the time.

✅ Before You Answer

• Identify which single condition, if not immediately corrected, can cause serious boiler damage within minutes • Distinguish between what affects efficiency vs. what affects immediate safety of the pressure vessel • Consider what a low‑water cutout device is intended to protect against in marine boiler practice