Protectofier 6642 - Combustion Safeguards Operate with Flame Rod and/or P-C II Scanner 6642 Features Modularized Multi-Burner Control 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 6642VA Basic combustion safeguard model FORM 6642VB Breaker - lockout switch model Required for automatic lighted installations. System "latches out" after failure to light within ignition trial time and cannot attempt restart until switch is manually reset. Standard ignition trial time is 15 seconds. Also available in 10-second and 5-second trial time. Form 6642VBNR - Automatic only and Non-relight. FORM 6642VL Load relay - included for all multi-burner models FORM 6642VT Timofier model plugin, fixed time assembly. The timofier provides purge time and ignition trial time. The ignition trial time is deducted from the motor time cycle (1/2, 1, 1-1/4, 2, 3, 4, and 6 minutes available for manual and automatic models; 10 minutes for manual model only) to purge the time. Standard ignition trial time is 15 seconds. Also available in 10-second and 5-second trial time. Specify both purge and ignition times. Purge time shall allow system to have a minimum of four fresh air changes. FORM 6642VBL Combines features of Breaker and Load relay models described above. Form 6642VBLNR - Automatic only and Non-relight. FORM 6642VBT Combines features of Breaker and Timofier models described above. Form 6642VBTNR - Automatic only and Non-relight. FORM 6642VLT Combines features of Load relay and Timofier models described above. FORM 6642VBLT Combines features of Breaker, Load relay, and Timofier models described above. Form 6642VBLTNR - Automatic only and Non-relight. FORM 6642FF Full Feature Combustion Safeguard including: Proof of Closure Proof of High Fire Purge Purge Timing (In 15 sec. increments, 7 min. 45 sec. max) Proof of Low Fire Start Ignition Trial Timing (Pilot) 10 sec. Pilot Interrupt Timing (Main burner ignition trial) 10 or 15 sec. Alarm output if the safety interlocks (limit switches) or flame failure causes shutdown. Relay contacts available to drive actuator to high fire for purge, low fire for ignition trial, and control when main burner is proven. Eight status lights