tekmar's Multiple Boiler Control
tekmar's Multiple Boiler Control 268 can operate up to nine boiler stages (one-, two-, three- or four-stage boilers). The 268 uses outdoor reset to improve the seasonal fuel efficiency by operating the boilers at the lowest practical temperature. It provides equal run time rotation of each boiler to increase the system's service life. Outputs are included for primary pump control and boiler pump control, as well as combustion air or alarm.