Figure 3.4-4: 25% Air/Fuel Valve Ignition Position
6. Up to 7 seconds will be allowed for ignition to be detected. The igniter-injector relay will be
turned off one second after flame is detected.
7. After 2 seconds of continuous flame, FLAME PROVEN will be displayed and the flame
strength will be indicated. After 5 seconds, the current date and time will be displayed in
place of the flame strength.
8. With the unit firing properly, it will be controlled by the temperature controller circuitry. The
heater’s VALVE POSITION will be continuously displayed on the front panel bar-graph.
Once the demand for hot water has been satisfied, the Edge Controller will turn off the SSOV
gas valve, the blower relay will be deactivated, the Air/Fuel Valve will be closed and the
Controller will display Standby.
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