Dialing in a burner means working through low, mid and high fire, adjusting gas pressure, air damper, cam screws or servo curve points while reading the analyzer. The target is the least excess air that still gives low CO and a stable flame at every rate, with margin for changes in weather and fuel. A burner that was dialed in on a hot day often runs lean in winter.
New burner's in, I'll dial it in tomorrow with the analyzer once the building's pulling a real load.
Also heard as
- tune
- set up the burner
Related terms
Combustion analysis
Testing a burner's flue gas for oxygen, CO, CO2 and temperature to set it up safely and efficiently.
Excess air
Combustion air supplied beyond the exact amount needed to burn all the fuel, expressed as a percentage.
Jackshaft
The shaft and linkage system that lets one motor move a burner's fuel valve and air damper together.
O2 trim
A control that measures flue gas oxygen and continuously adjusts the air-fuel ratio to hold it at target.