FULTON VMP-W 40 -150 HP Installation And Operation Manual page 41

SECTION 4
VMPW-IOM-2012-1001
Problem
Poor Combustion
Burner back res
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Troubleshooting Gas Fired Boilers
Potential Cause
Refractories
Not Enough Air/Build-Up on Fan
Wheel (Rich; Burner Hums)
Fuel Valve Adjusted Too High
(Rich; Burner Hums)
Too Much Air (Lean; Unstable
Flame)
Gas Valve Adjusted Too Low
(Lean; Unstable Flame)
Draft
Dirty Flue
Negative Room Pressure
Refractories
Ignition Electrodes
UV Scanner
Draft
Negative Room Pressure
Potential Remedy
Check refractories to see if they are cracked or
broken in pieces. Replace as necessary.
Check CO2/O2 levels. If rich, disassemble lter
housing and gas train. Look inside inlet to the
fan. If there is build-up on the fan blades, clean
fan. Recheck the CO2/O2 and adjust gas valve as
necessary for all combustion points.
Check CO2/O2 levels. Check gas pressure at
outlet of valve. If the pressure is too high, make
an adjustment at the valve. Be sure to check all
combustion points.
Check fan discharge pressure. If too high,
adjust damper. Check CO2/O2 levels and adjust
gas valve as necessary. Be sure to check all
combustion points.
Check CO2 and O2 levels. Check pressure at outlet
of the valve. If too negative, adjust gas valve as
necessary.
Check draft with a gauge. Draft should be a -.02
in to -.04 in wc with burner o or -.04 in to -.06 in
when operating. May need to install a barometric
damper.
Check ue for carbon buildup or blockage. Clean
ue passages with brush.
Make sure no exhaust fans are running in the
boiler room.
Check refractories to see if they are cracked or
broken in pieces. Replace as necessary.
Check electrodes for carbon buildup and clean if
necessary. Check for proper adjustment. Readjust
if necessary. Check for cracks in porcelain; if found
replace.
Check for debris on ame scanner and clean as
needed. Check for proper location of detector.
Check draft with a gauge. Draft should be a -.02
in to -.04 in wc with burner o or -.04 in to -.06 in
when operating. May need to install a barometric
damper.
Make sure no exhaust fans are running in the
boiler room.
MAINTENANCE
4-11