Cleaver-Brooks Packaged Boiler FLX-550

Make visual inspection of the igniter

Make audible and visual check of valves

Check valve position indicators

Ensure the fuel supply is shut off before starting maintenance.

Disconnect the pilot gas supply line.

Remove the screws on the pilot access plate.

Disconnect the high voltage ignition cable by pulling it straight back, away from the pilot assembly.

Slide the pilot gun assembly back away from the flame side of the burner.

Retract the pilot assembly through the access hole after clearing the burner head bracket.

Ensure low and high-fire adjustments are complete

Prepare a 3/32” hex key, cut to approximately 3/8” for low-fire position adjustment

Adjust the metering cam using the 14 adjusting screws

Record flue gas readings at various points of the cam profile

Was the automatic modulating cycle operated to assure satisfactory results?

Manually adjust until switch opens

High and Low Gas Pressure Interlocks

Manually adjust until switch opens

Ensure the pilot gas regulator is accessible

Verify that the flame safeguard system information is available

Measure the flame signal using a microamp or voltage reading

Is the flame size sufficient to ignite the main flame and visible to the flame detector?

Is the flame size not overly large to avoid sooting or carbon buildup?

Verify the following conditions after adjustment