What is the procedure for flame guard circuit calibration?
Adjusting P1: This procedure is done at the factory, but may need to be re-done after replacing the restrictors, and after re-calibration. This procedure applies for both types of fuel. Set the flame guard circuit after calibration has been completed. Trim-pot P1 is located on the back of the flame-guard / anode power supply, PC board assembly. It is used to adjust the sensitivity of the flame guard circuit. When properly adjusted, the flame-out light should come on within 10 to 20 seconds after a flame out. 1) Turn the pot clockwise about 75% of its turns. Then ignite. 2) Turn the pot counter-clockwise until the flameout light just comes on. 3) Turn the pot gradually clockwise again (while repeating the ignition procedure) until the light remains off. 4) Check the flame guard circuit calibration by closing off the fuel at the tank, and observe that the light comes on when the fuel pressure drops. Note: This procedure for the set-up of the potentiometer P1 can also be found in the Flam
