Burner circuit contacts open after 15 second delay in a low water condition. Delay prevents short cycling caused by momentary fluctuations in the boiler water level. Automatically reactivates burner circuit 30 seconds after water reaches the probe, allowing optional water feeder to raise water level above the probe. Intermittent Level Test (ILT) feature provides maximum boiler protection by removing power from the burner circuit at set intervals.
Models ending in “1090” perform the ILT every 10 minutes for 90 seconds.
Models ending in “2060” perform the ILT every 20 minutes for 60 seconds.