Burnham LE L7248 - Manual (Page 10)

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Figure 11B: Wiring Diagram for LE Boilers with Beckett AFG Burner, EC000 Control,
and Honeywell L4080B High Limit
SEQUENCE OF OPERATION
Refer to EC5000 Manual for wiring and operation details.
SEQUENCE OF OPERATION
A call for heat by the thermostat energizes the L7248C control which in turn energizes the R7184B primary control. The burner
will initiate ignition after completing a 10 second pre-purge cycle. If burner ignites within approximately 45 seconds and the cad
cell sees flame, the burner will continue to operate until the call for heat is satisfied or the setting of the high limit is reached. The
circulator will operate as long as the thermostat is calling for heat. If the thermostat is not satisfied and the high limit is reached, the
circulator will continue to operate, and the burner will stop until the high limit is closed by a drop in boiler water temperature.
Figure 11A: Wiring Diagram for LE Boilers with Beckett AFG Burner and Split Controls