B&R ECEP128-0 Logic control module

For direct spark ignited oil burners, substitute the words Main-Oil Valve for Pilot Valve. 1. Constant 120 VAC should be available to the Ll-L2 terminals only on the wiring base. 2. The operating control circuits (Ll-3) will close, signaling the burner to start its firing sequence. Terminal 13, fuel valve end switch must be closed. 3. The burner/blower motor (terminal M) circuit is energized. The running interlock (limit) circuit (3-P) will close (e.g. all limits, interlocks, etc. are proven).

The firing rate motor (Modulator Motor) is driven 

toward the high purge open damper position (10-X circuit made). When the firing rate motor reaches its open damper position, the Hi Purge switch closes (M-8) and the prepurge interval of 30* seconds is initiated. Assuming countdown method, the BLV512 will display:If the M-8 circuit does not close, the program will hold in this position for ten minutes waiting for it to close. If it does not, the control will lockout. If the M-8 circuit is closed at the start of a cycle, the top line of a display will switch to PURGE 20 seconds If the M-8 circuit is not closed at the beginning of a cycle, the top line of a display will switch to PURGE 10 seconds.

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