Troubleshooting Fuel System
SECTION
SECTION
16
16
Troubleshooting Fuel System
Is oil flow steady and without air bubbles or foam?
YES
• Remove nozzle assembly; check gap between electrode rods; adjust as necessary. • Check electrode rods–they should be clean with no carbon build up–and check porcelain insulator for cracks; clean and remove any carbon build up. • Reassemble nozzle assembly onto nozzle supply line and direct spray into a container.
• Does oil supply tank have enough oil in it? If not, fill with at least 10 gallons of fuel if tank is 275 gallons. • Are all oil supply line valves open? • Are all oil supply line fittings tight, not to allow air leakage?
Is blast tube free of any obstruction?
A
YES
• Run for a cycle to be sure flame doesn’t cut out.
YES
If any problem repeats itself, start over.
Does unit continue to run without shutting off on safety?
NO
NO
Clean out using a brush.
16
NO
• If noisy, open inspection door. • Nozzle may be too large or unit may need to be vacuumed out.
• Clean or replace CAD CELL eye.
Does unit continue to run without shutting off on safety?
Replace nozzle.
YES
NO YES
Go to Box A.
Is oil flow steady and without air bubbles or foam? YES
Close valve before filter. Place a container under oil filter. Remove can. Remove and check oil filter element.
Is canister full of oil?
See Electrical Troubleshooting.
YES
Remove pump cover. Is pump strainer clean?
NO
NO
With can off and a container under filter assembly, open valve.
Is oil filter element clean?
Does oil flow?
NO
Replace oil filter and gasket. The pump stainer may need to be cleaned or replaced as well.
• Reassemble nozzle line. • Restart burner.
Is flame uniform and relatively quiet?
NO
NO
• • • •
YES
technical information
Is oil flow steady and without air bubbles or foam?
NO
• Check blast tube for any obstructions or carbon build-up on end cone.
Is spray a fine mist with no restriction or dripping?
Repair as needed.
Place a container under pump bleeder and bleed pump.
troubleshooting
Always turn off electrical power when removing or replacing controls and be alert and careful when troubleshooting controls with power on.
YES
• Clean or replace. • Nozzle may also need to be replaced.
YES
• Check coupling between pump and motor.
Is it turning? NO
• Remove motor from burner housing. • Turn pump shaft by hand.
YES
• Check tube for any obstructions or carbon build-up on end cone.
YES
Replace pump. Go back to Box A.
Is blast tube free of any obstruction? NO
Replace coupling.
Does shaft turn freely in direction of arrow on pump cover?
NO YES
• Oil line must be restricted or clogged. • Use a pressure vacuum pump to remove blockage in the oil lines until oil flows unrestricted.
NO
Clean out using a brush.
Go to Box A.
236 16_Troubleshooting_p295.indd 236-237
F.W. Webb Company
www.fwwebb.com
The F.W. Webb Heating Catalog
F.W. Webb Company
237 3/24/08 4:29:58 PM