Trouble Shooting Guide - Columbia WL-60 Owner's Manual

1. Turn off power to boiler and set aquastat or thermostat to "off."
2. Clean boiler and chimney thoroughly. See previous sections for details.
3. Spray interior of combustion chamber with light oil to protect against corrosion.
4. Separate electrical disconnect cord. Remove oil and air lines. Take burner to work bench. Clean burner
nozzle, electrodes, head and other burner parts. Replace any worn parts as needed. Replace burner on
boiler so it will be ready for next season.
5. Service oil tank screens and filters and screen in head of pump. Pump gaskets are fragile so have a spare
gasket available.
6. Flush oil pump with #2 fuel oil or kerosene. Reassemble pump.
7. Drain water and sludge from fuel tank.
Start up procedures for the new heating season are the same as a initial start up.
Following these tips will help assure a longer life of the boiler, and will be ready for the next heating season.
For your safety switch off power supply before servicing.
Success will come from determining which are not present and how to fix them.
1. Check oil pressure, it should hold constant and not fluctuate or drift up and down.
2. Be sure a spray of oil is going into chamber, if not, find obstruction. Cleaning the nozzle, oil solenoid, or
regulator may be required. A fine mist can look like adequate oil is being sprayed but there may be
inadequate volume to establish a flame. Determine whether the fuel supply is combustible. Antifreeze,
paint, or water may have entered the oil lines.
3. Check oil filters in line. All filters in the oil line need to be checked and cleaned periodically. They will
become blocked with continued use and slowly restrict oil flow.
4. Inspect check valve to see if they open as expected and in the proper direction. Check strainer in the oil
tank for dirt. Check strainer in pump head for blockage but have replacement head gasket available as the
gaskets are fragile.
5. Check for spark at electrodes. Check for proper gap, for shorting to nozzle or head. Be sure igniter is
receiving power and creating voltage for a arc. Electrode tips should be free of carbon and ash buildup.
Tips should diverge to fan the arc over the nozzle.
6. Check air pressure and volume in supply line. Starting pressure should be be about 13-15 PSI but not f
luctuate wildly or drift up and down. A falling air pressure or inability to adjust to 25 psi at the burner
regulator can indicate inadequate volume of air supply.
END OF HEATING SEASON/SUMMER STORAGE
TROUBLE – SHOOTING GENERAL
Burner Fails To Ignite
A flame requires three components: 1. fuel 2. spark 3. air .
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