The main flame trial-for-ignition period shall not exceed 30 seconds when the burner has a low firing rate start under 16 gallons per hour and shall not exceed 15 seconds when the burner does not have such a low firing rate start. The main flame shall be supervised continually while the burner is firing. The electrical circuit to the main fuel valve shall be automatically de-energized within four seconds after flame failure and the de-energized valve shall automatically close within the next five seconds. The burner may make one attempt to relight automatically during this flame failure reaction time before the valve closes.
N.Y. Comp. Codes R. & Regs. Tit. 12 §§ 4-11.6