Protectofier 7256 - Combustion Safeguards Operate with Flame Rod and/or P-C II Scanner 7256 Features Compact Design - Single Burner Time Proven Plug-in Solid State FLAME-PAK Amplifier Plug-in, Interchangeable Relays Plug-in Power Transformer Flame Rod and/or Ultra-Violet Sensing. Independent or simultaneously using same FLAME-PAK Amplifier. FORM 7256-AH/AHE Basic manual model "E" indicates enclosed model FORM 7256-B/BE Manual or automatic operation Recycle on flame failure automatic. Select ignition trial timing cycle: 15 sec.(standard), 5 sec. or 10 sec. "E" indicates enclosed model FORM 7256-BH/BHE "H" indicates flame failure alarm Recycle on flame failure automatic. Select ignition trial timing cycle: 15 sec.(standard), 5 sec. or 10 sec. "E" indicates enclosed model FORM 7256-BNRE/BNRHE "NR" indicates automatic models with additional relay to prevent relight attempt on flame failure. Select ignition trial timing cycle: 15 sec.(standard), 5 sec. or 10 sec. "E" indicates enclosed model FORM 7256-BTNRE/BTNRHE "T" indicates plug-in "SST" purge timer provided for fixed pre-purged cycle. Select purge cycle: 15, 30, 60 or 90 sec. Select ignition trial timing cycle: 15 sec.(standard), 5 sec. or 10 sec. "E" indicates enclosed model