Thermo Dynamics CWL - Flame Loss During Operation

20
Poor Fire Inspect flame for stability.
Oil Supply If burner loses flame prior to the
primary control locking out, fault
is in fuel system.
Combustion Reduce combustion air supply.
Air
Pump Install pressure gauge in gauge
port of fuel pump. Pressure
should be according to installer/
serviceman labels starting on
page 24.
Excessive Take a draft reading. Draft should
Draft be according to installer/service-
man labels starting on page 24
in stack.
Poor Flue Insert CO2 probe into heat
Gas Sample exchanger tube. If reading is
greater by 1/2% or more, sample
was being diluted near flue box.
Testing Using a chemical absorption type
Method device, let instrument set after a
test before venting. If CO2
reading increases 1/2% fluid is
weak.
Nozzle Check for faulty nozzle.
Unbalanced fire.
Excessive draft.
Insufficient draft.
Insufficient combustion air sources.
Air leak in fuel system.
Water in oil tank.
Fuel supply valve closed.
Restriction in oil line.
Plugged fuel filter.
Plugged pump strainer.
Cold oil.
Too much combustion air.
Pump discharge pressure
incorrectly set.
Coupling worn or broken.
Pump worn - low pressure
motor overloads.
Incorrect draft setting.
Leak in flue system.
Weak fluid.
Plugged orifice or distributor.
Plugged nozzle strainer.
Poor spray pattern.
Replace nozzle with specified
nozzle.
Reduce draft setting.
Increase draft.
Increase combustion air sources.
Repair leak - use only flare
fittings.
Strip tank of water exceeding
2" in depth.
Open valve.
Clear oil line restriction.
Replace filter cartridge.
Clean Strainer.
Use #1 heating oil.
Close air band and air to raise
CO2. Check with instruments.
Set pressure according to
installer/serviceman labels
starting on page 24.
Replace coupling.
Replace pump.
Reduce setting. Install second
draft regulator if necessary.
Sample CO2 in heat exchanger.
Seal flue system leak.
Replace fluid in testing device.
Replace nozzle with specified
nozzle.
SOURCE PROCEDURE CAUSES REMEDY
TROUBLE: BURNER FIRES, BUT THEN LOSES FLAME
When checking burner adjustments always use instruments.