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Profire E/LNE Series Manual
3-7
Operation
1.
The fuel valve(s) de-energize and the flame extinguishes. The blower motor continues running during post-purge.
2.
At the end of post-purge, the blower motor is de-energized.
3.
The programmer returns to its starting position and stops. The unit is ready to restart.
Abnormal shutdown might result from motor overload, flame outage, low water, current or fuel supply interruption,
combustion or atomizing air pressure below minimum level, tripped circuit breakers, blown fuses, or other interlock
devices. Check for the cause and make the necessary corrections before restarting the burner.
Safety shutdown caused by ignition or flame failure will actuate a red indicator light and energize an audible alarm (if
so equipped). If the programmer has a non-recycling interlock circuit, any interruption in this circuit during the pre-
purge or firing cycle will cause a safety shutdown. This type of shutdown requires manual reset of the programming
control and must be corrected before operation can be resumed.
An ultraviolet flame sensor electrical spark interference test must be performed after final adjustment. See Section 3.2 in
this chapter for additional information.
!
Warning