6642VT Flame Safeguard, single burner with purge timer by Protectofier
Fixed Timing ProtectofierThis model has a timofier module plug in that sets the purge time
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.