User guide
Maintenance
36-O 4/00
Problem Cause Remedy
Burner Cut-Off 10. Dirty Scanner/Cad Cell Check scanner/cad cell and clean as necessary.
(cont.)
11. Low Water Cut Off Make sure relay is plugged in tightly. If so, and still
Relay failure inoperative, replace.
Poor Combustion 1. Refractories Check refractories to see if they are plugged with soot or
broken in pieces. Clean or replace as necessary.
2. S.S. Ring Check to be sure ring is present and fits tight against the
furnace wall.
3. Oil Nozzle Check for clogged nozzle. Clean or replace.
4. Primary Air Check air adjustment. Air may be blowing fire
Adjustment away from flame sensor.
5. Secondary Air Check main air adjustment to see if it is loosened up.
Adjustment Adjust as necessary and tighten in position.
Check CO
2
and O
2
level.
6. Oil Pump Check for clogged strainer or filter. Remove and clean.
Check for slipping or broken coupling. Tighten or replace.
Check for frozen pump shaft. Replace.
7. Draft 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.
8. Dirty Flue Check flue for carbon buildup or blockage. Clean flue
passages with brush.
9. Negative Room Pressure Make sure no exhaust fans are running in the boiler room.
Burner back fires 1. Refractories Check refractories to see if they are cracked or
broken in pieces. Replace as necessary.
2. Ignition Electrodes Check electrodes for carbon buildup and clean if
necessary. Check for proper adjustment Readjust if
necessary. Check for cracks in porcelain; if found replace.
3. Primary Air Adjustment Check air adjustment. Air may be blowing fire away from
flame sensor.
4. Oil Valve(s) Check for leaking oil valve(s) and replace.
5. Draft 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.
6. Negative Room Pressure Make sure no exhaust fans are running in the boiler room.
7. Loss of Prime Check all lines for possible air leak in intake line and
tighten. Check for possible restricted intake line. Replace.