Two-stage boiler gas burner operation tutorial

Two-stage boiler gas burner operation tutorial:

1. How to adjust the flame with one click

2. How to adjust the gas intake

3. How to adjust the fan air volume

4. How to troubleshoot common burner problems

What is a Two-Stage Boiler Gas Burner?

A two-stage gas burner is a burner that can operate at two distinct firing rates: Low Fire and High Fire. Unlike a single-stage burner that is simply on or off, a two-stage burner can modulate its output to better match the heating demand of the building.

This is typically managed by the boiler's control system, which opens or closes a second gas valve and adjusts the combustion air (via a variable-speed blower) based on signals from an outdoor temperature sensor or the boiler's own aquastat.