Main Burner Flame Establishing Period : The length of time fuel is permitted to be delivered to the main burner before the flame-sensing device is required to detect the main burner flame
NFPA 31 Standard for the Installation of Oil-Burning Equipment, 2001 ed. https://www.nfpa.org/Assets/files/AboutTheCodes/31 /LPI-AAA_ROPagenda_06-09.pdf, (Std: Install of Oil-Burn Equip - Amer) {195 NFC}