Troubleshooting - State Water Heaters GPO 86-199 Installation & Operation Instruction

TROUBLE CAUSE
Oil level below intake line in supply tank.
Clogged strainer or filter.
Clogged nozzle.
Air leak in intake line.
Restricted intake line. (High vacuum reading).
No Oil Flow A two line pipe system that becomes air bound.
at Nozzle
A single line pipe system that becomes air bound.
Slopping or broken coupling.
Rotation of motor and fuel unit pump is not the
same as indicated by arrow on the pad at top of unit.
Frozen fuel pump shaft.
Loosen plugs and fittings.
Leak at pressure adjusting screw or nozzle plug.
Oil Leak Blown seal (single-pipe system)
Seal leaking.
Cover.
Bad coupling alignment.
Noisy
Operation
Air in inlet line.
Tank turn on two line pipe system and inside tank.
Partially clogged strainer or filter.
Air leak in intake line.
Air leaking around cover.
Low Oil
Defective gauge
Pressure Nozzle capacity is greater than fuel pump capacity.
To determine the cause of improper cut-off, insert
a pressure gauge in the nozzle port of the fuel pump.
After a minute of operation, shut burner down. If the
pressure drops from normal operating pressure and
stabilizes, the fuel pump is operating properly and air
is the cause of improper cut-off. If, however, the
pressure drops to 0 psi, fuel unit should be replaced.
Improper
NOTE: Never use the amount of pressure drop as an
Nozzle indication of the quality or speed of cut-off.
Cut-Off Filter leaks.
Strainer cover loose.
Air pocket between cut-off valve and nozzle.
Air leak in intake line.
Partially clogged nozzle strainer.
Leak at nozzle adaptor.

TROUBLESHOOTING

TABLE 10 - OIL BURNER TROUBLESHOOTING
22
REMEDY
Fill tank with oil.
Remove and clean strainer. Replace filter element.
Replace nozzle.
Tighten all fittings in intake line. Tighten unused intake
port plug. Check filter cover and gasket.
Replace any kinked tubing and check any valves in
intake line.
Check for and insert by-pass plug. Make sure return
line is below oil level in tank.
Loosen gauge port plug or air bleed valve and bleed oil
for 15 seconds after foam is gone in bleed hose, Check
intake line fittings for tightness. Check all fuel pump plugs
for tightness.
Replace coupling.
Install fuel pump with correct rotation.
Replace fuel pump. Check for water and dirt in tank.
Tighten with good quality thread sealer.
Replace fuel pump.
Check to see if by-pass plug has been left in fuel pump.
Replace fuel pump.
Replace fuel pump.
Tighten cover screws.
Loosen fuel pump mounting screws slightly and shift
fuel pump in different positions until noise is eliminated.
Retighten mounting screws.
Check all connections. Use only good flare fittings.
Install return line hum eliminator.
Remove and clean strainer.
Tighten all fittings.
Be sure strainer cover screws are tightened securely.
Check for damaged cover gasket.
Check gauge against master gauge or other gauge.
Replace fuel unit with unit of correct capacity.
Check face of cover and gasket for damage.
Tighten 4 screws on cover.
Run burner, stopping and starting unit, until smoke
and after-fire disappears.
Tighten intake fittings. Tighten unused intake port and
return plug.
Clean strainer or change nozzle.
Change nozzle and adaptor.