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Combustion Setup
e1. _____ Check incoming fuel pressure using the Dwyer 477AV-3 (0” to 200”) Manometer. In most cases, pressure needs to be between 50”w.c. and 62”w.c.. Check AMU name plate to confirm. If pressure is zero – ensure all ball valves/meters upstream of the unit are turned on If pressure is between 1” and 50”, contact gas supplier/plumber to see if pressure can be increased. If pressure is above 62”, contact gas supplier/plumber to have regulator installed/adjusted. e2. _____ Remove the red cover from the FireEye controller. Locate the “run/check” toggle switch and ensure it is set for “run”. e3. _____ With the fans running, connect Dwyer 477AV-0 (0” to 10”) Manometer to the burner manifold pressure test port. Note the pressure reading (should be negative at this time, typically -1” to -2”). e3a. Burner off, fan running - Manifold Pressure: ______________ e4. _____ At the AMU control panel, with the fans running, turn on SW6. The burner should attempt to ignite. When the ignition sequence begins, put the run/check toggle switch on “check” – this will allow the pilot to ignite, but not the main flame.
e4a. igniter will energize creating a spark within the burner e4b. pilot solenoid will energize allowing fuel to flow into burner e4c. FireEye controller will check for flame signal from flame rod
e5c. If the flame fails to ignite and a “Burner Enable Interlock” fault occurs, see i6 e5d. If the flame fails to ignite and a “Flame Safeguard” fault occurs, see i5 e5. _____ Visually inspect the pilot flame through the sight glass. The pilot should be about the size of a golf ball. e6. _____ Check the DC flame signal at the test ports on the FireEye flame controller. Voltage should be between 7vdc and 10vdc. e7. _____ Turn off SW6 and put the run/check toggle switch on the FireEye to “run”. e8. _____ Turn on SW6. The burner should attempt to ignite. e8a. igniter will energize creating a spark within the burner e8b. pilot solenoid will energize allowing fuel to flow into burner e8c. FireEye controller will check for flame signal from flame rod e8d. if flame is proven, FireEye will energize main gas valves e9. _____ Visually inspect the main flame through the sight glass. The low fire flame should be as small as possible while still propagating all the way across the burner (no flickering). e10. _____ Engage the clutch on the gas actuator so that it can be turned manually. e11. _____ After the gas valves energize, force the gas actuator to the high fire position and record the burner manifold pressure. (NOTE: Don’t leave the actuator at high fire for too long, or the high temp limit may fault.) e11a. Burner Manifold Pressure Reading at High Fire:__________ e12. _____ Force the gas actuator to low fire position. Add the “burner off” reading ( e3a. ) to the high fire reading ( e11a. ) to determine the total manifold pressure.
e3a. __________ + e11a. __________ = e12a. ___________ (burner off) (burner hi fire) (total pressure) Example: burner off: -2” burner at high fire: +6” total pressure = +4”
e13. _____ Compare total manifold pressure reading ( e12a. ) to nameplate on the door of the control panel. Adjust the main gas regulator as needed to achieve design manifold pressure (screw in for more gas pressure, screw out for less gas pressure).
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