FULTON VMP40 Installation, Operation And Maintenance Manual page 55

Maintenance
PROBLEM
Flame Failure
Burner Cut-Off
Poor Combustion
Burner back fires
44
VMP IOM
CAUSE
1. Power Supply
2. Gas Supply
3. Ignition Electrodes
4. Primary Air Adjustment
5. Scanner
6. Flame Safeguard Control
7. Loose wire at fuel valve circuit
8. Contact open on air safety switch Adjust to proper setting.
9. Scanner wiring reversed
at panel box
1. Power Supply
2. Gas Supply
3. Ignition Electrodes
4. Scanner
5. Air Switch
6. Gas Valve Sticking (Pilot)
7. Weak Amplifier
8. Weak Pilot
9. Faulty Liquid Level Control
10. Dirty or defective UV Scanner
1. Refractories
2. Air Adjustment
3. Draft
4. Dirty Flue
5. Negative Room Pressure
6. Gas Servo Malset
7. Air Servo Malset
1. Refractories
2. Ignition Electrodes
3. UV Scanner
4. Draft
5. Negative Room Pressure
REMEDY
Check fuse or circuit breaker. Reset or replace, as necessary.
Check for gas pressure and for intermittent supply problems.
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 air adjustment. Air may be blowing flame away from burner head.
Check for dirt on flame scanner and clean. Check for proper location
of detector.
Check voltage at terminal leading to main gas valve. If no power,
replace the control.
Tighten wiring connections.
Change to correct terminals.
Check fuse or circuit; reset or replace, as necessary.
Check to be sure main gas cock is not closed.
Check coil in gas valve with OHM meter. Replace if faulty.
Check gas regulator setting and readjust as necessary.
Check inlet gas pressure and increase or decrease 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 dirt on flame scanner and clean.
Check for proper location of detector.
Check for bad air switch by jumpering the two air switch leads as the
terminal block. If the boiler starts and runs with these terminals
jumpered, the air switch should be replaced.
Check for dirt in valve or orifice and clean if necessary.
Check for faulty actuator or valve and replace if necessary.
Replace.
Adjust to larger pilot by adjusting pilot gas pressure regulator.
Check to see if there is power to terminal number 10 when the sight
glass shows the proper water level. If there is no power at this terminal,
the control is bad and must be replaced.
Clean or replace.
Check refractories to see if they are plugged with soot or broken in
pieces. Clean or replace as necessary.
Check CO and O levels. Adjust Gas/Air Ratio.
2 2
Check draft with a gauge. Draft should be a -.02" to -.04" W.C. with
burner off or -.04" to -.06" when operating. May need to install a
barometric damper.
Check flue for carbon buildup or blockage. Clean flue passages with brush.
Make sure no exhaust fans are running in the boiler room.
Adjust gas servo setting.
Adjust air servo setting.
Check refractories to see if they are plugged with soot 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 i nporcelain; if found, replace.
Check for dirt on flame scanner and clean.
Check for proper location of detector.
Check draft with a gauge. Draft should be a -.02" to -.04" W.C. with
burner off or -.04" to -.06" when operating. May need to install a
barometric damper.
Make sure no exhaust fans are running in the boiler room.