How Does a Flame Safeguard Work on a Boiler? Burner Management System Explained. - The Boiling Point

How Does a Flame Safeguard Work on a Boiler? (Full BMS Startup Sequence Explained)

Every boiler startup must go through a series of critical safety checks — and the Flame Safeguard/Burner Management System (BMS) is the brain behind it all. In this episode of The Boiling Point, Richie Ware and the WARE team break down exactly what a flame safeguard does before, during, and after burner ignition.

📌 What You’ll Learn:

What is a flame safeguard on a boiler?

What is a burner management system (BMS)?

How does the ignition trial and pilot proving work?

How does a boiler purge cycle prevent explosions?

What's the difference between Fireye, Honeywell, and Autoflame systems?

Why does a boiler lock out during startup?

📍 Boiler Flame Safety — Chapter Markers
00:00 — Flame safeguard introduction
00:16 — What the BMS checks before startup
00:45 — Gas valve confirmation / proving closed
01:08 — Pre-purge sequence & airflow proving
01:29 — Ignition trial & pilot proving
01:50 — Main flame validation / flame scanner signals
02:55 — Running interlocks & airflow safety
03:40 — Lockout behavior and alarms
04:21 — Safe shutdown & post-purge
05:52 — Cold start considerations and refractory protection
06:29 — Modern BMS vs legacy systems
07:08 — Flame safeguard jumpers & customization
10:03 — Fireye overview (red box)
14:56 — Honeywell overview (blue box)
15:36 — What a BMS actually controls in the boiler
16:20 — Autoflame flame safeguard benefits
17:02 — Upgrading to parallel positioning
18:44 — Why downloadable data & password protection matter
19:34 — Demonstration of burner modulation control
22:13 — Purge & light-off sequencing with relays
24:17 — Linking flame safeguard with pressure control
26:12 — Unlocking Autoflame for full modulation control
26:40 — Part numbers & installation resources

✅ Need Flame Safeguard Parts or Support?

BoilerWAREhouse can ship Fireye, Honeywell, and Autoflame controls fast:
👉 BoilerWAREhouse.com — Parts You Need. People You Trust.


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