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Cause
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Remedy
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NO
OIL FLOW AT NOZZLE
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Oil level
below intake line in supply tank
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Fill tank
with oil.
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Clogged strainer
or filter
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Remove and
clean strainer. Replace filter element.
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Clogged nozzle
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Replace nozzle.
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Air leak
in intake line
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Tighten all
fitting in intake line. Tighten unused intake port plug. Check
filter cover and gasket.
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- Restricted
intake line
-
(High
vacuum reading)
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Replace any
kinked tubing and check any valves in intake line. Check Form
440100 for line sizes.
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A two-pipe
system that becomes airbound
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Check for
and insert by-pass plug. Make sure return line is below oil
level in tank.
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A single-pipe
system that becomes airbound
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Loosen gage
port plug or easy flow valve and bleed oil for 15 seconds
after foam is gone in bleed hose. Check intake line fittings
for tightness. Check all pump plugs for tightness.
|
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Slipping
or broken coupling
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Tighten or
replace coupling.
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Rotation
of motor and fuel unit is not the same as indicated by arrow
on pad at top of unit
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Install fuel
unit with correct rotation. See Form No. 440100.
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Frozen pump
shaft
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Return unit
to approved service station or Suntec factory for repair.
Check for water and dirt in tank.
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OIL
LEAK
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Loose plugs
or fittings
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Dope with
good quality thread sealer. Retighten.
|
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Leak at pressure
adj. screw or nozzle plug
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Washer may
be damaged. Replace the washer or O-Ring.
|
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Blown seal
(single-pipe system)
|
Check to
see if by-pass plug has been left in unit. Replace fuel unit.
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Blown seal
(two-pipe system)
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Check for
kinked tubing or other obstructions in return line. Replace
fuel unit
|
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Seal leaking
|
Replace fuel
unit.
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Cover
|
Tighten cover
screws or replace damaged gasket.
|
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NOISY
OPERATION
|
Bad coupling
alignment
|
Loosen fuel
unit mounting screws slightly and shift fuel unit in different
positions until noise is eliminated. Retighten mounting screws.
|
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Air in inlet
line
|
Check all
connections. Use only good flare fittings.
|
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Tank hum
on two-pipe system and inside tank
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Install return
line hum eliminator, in return line.
|
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PULSATING
PRESSURE
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Partially
clogged strainer or filter
|
Remove and
clean strainer. Replace filter element.
|
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Air leak
in intake line
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Tighten all
fittings.
|
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Air leaking
around cover
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Be sure strainer
cover screws are tightened securely. Check for damaged cover
gasket.
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LOW
OIL PRESSURE
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Defective
gage
|
Check gage
against master gage, or other gage.
|
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Nozzle capacity
is greater than fuel unit capacity
|
Replace fuel
unit with unit of correct capacity. See Form No. 440100
for GPH, P.S.I., and R.P.M.
|
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IMPROPER
NOZZLE CUT-OFF
|
To determine
the cause of improper cut-off, insert a pressure gage in the
nozzle port of the fuel unit. After a minute of operation
shut burner down. If the pressure drops from normal operating
pressure and stabilizes, the fuel unit is operating properly
and air is the cause of improper cut-off. If, however, the
pressure drops to 0 P.S.I., fuel unit should be replaced.
NOTE: The
A-70 pump circuitry is designed to give a high cut-off of
superb quality. Never use the amount of pressure drop as an
indication of the quality or speed of cut-off.
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Filter leaks
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Check face
of cover and gasket for damage.
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Strainer
cover loose
|
Tighten 4
screws on cover.
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Air pocket
between cut-off valve and nozzle
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Run burner,
stopping and starting unit, until smoke and after-fire disappears.
|
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Air leak
in intake line
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Tighten intake
fittings. Tighten unused intake port and return plug.
|
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Partially
clogged nozzle strainer
|
Clean strainer
or change nozzle.
|
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Leak at nozzle
adapter
|
Change nozzle
and adapter.
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