Trouble - Shooting General - FireLake 155 Owner's Manual

Multi-oil furnaces single pass/3-pass units
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For your safety switch off power supply before servicing.
Only qualified persons should service equipment.
TROUBLE – SHOOTING GENERAL
A flame requires three components: 1. fuel 2. spark 3. air .
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.
sure igniter is receiving power and creating voltage for a arc.
of carbon and ash buildup.
6. Check air pressure and volume in supply line. Starting pressure should be be about 13 PSI
but not fluctuate wildly or drift up and down.
to higher pressure can indicate inadequate volume of air supply.
7. Check for condensation in compressed air line. Air solenoid could be sticking or air
proving switch stuck in open position.
motor, and oil valve.
1. Vacuum leaks in oil pump or suction line. A dancing gauge pressure is good indicator.
2. Excessive combustion air or damaged, abnormal shaped retention head.
3. Dirty or plugged fuel filter. Dancing or low vacuum pressure is good indicator.
4. Nozzle or adapter o-rings in nozzle assembly defective, allowing bypass.
burner's air regulator pressure up and down between 0 and 15 psi will cause oil pressure to
change with it the o-rings may not be sealing.
5. Water or antifreeze in the fuel. Confirm the fuel is combustible and consistent.
6. Condensation in the compressed air supply not delivering consistent air volume.
1. Obstruction in nozzle, air or oil solenoid, or air or oil regulator - clean or replace. Having
to operate at higher than normal pressures is indication.
Burner Fails To Ignite
Tips should diverge to fan the arc over the nozzle.
This would keep power from igniter, burner
Indicator would be green light does not come on.
Fluttering Or Pulsating Flame
Flame Failure
Page 44 of 44
Electrode tips should be free
A falling air pressure or inability to adjust
Be
If adjusting

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