For years, maintenance personnel have relied on electro-mechanical devices to control boilers.
Energy efficiency requires boiler control systems to closely match steam supply with steam demand.
Solid-state sensors enable modern boiler control packages to adjust rapidly and accurately to changes in demand. Another efficiency advantage afforded by intelligent control systems is the ability to individually characterize each boiler to establish default operating conditions. Separate checks are performed on the damper motor to ensure proper damper positioning during pre-purge and to correct modulating speed within 60 seconds. Proper rate linearization afforded by modern control systems automatically positions the air inlet damper to ensure required air flow while eliminating excess purging. An inherent program for thermal stress protection slowly increases the burner firing rate in cold starts to limit mechanical stress on the boiler due to thermal differences.