9
PROBLEM
POSSIBLE CAUSE
SOLUTION
BURNER SMOKES
(continued)
Low fuel pressure
Increase fuel pressure to manufacturer's specifications. See
Figure 25 on page 36 for pump features.
Air bubble in fuel lines
Check fuel lines for leaks or air bubbles. Tighten or replace
as needed.
Plugged or dirty burner nozzle
Replace burner nozzle. See page 23 for instructions.
Improper nozzle size installed, nozzle
size too big
Contact equipment manufacturer for proper nozzle size, and
replace. See page 23 for instructions.
Heavy accumulation of soot on heat
exchanger and burner assembly
Remove burner assembly from heat exchanger. Clean
thoroughly.
Faulty oil nozzle spray pattern
Replace. See page 23 for instructions.
Misaligned or damaged electrode
Realign electrodes according to Figure 15 or Figure 16 on
page 28, and the oil gun depth according to Figure 17 or
Figure 18 on pages 29.
Obstruction in smoke stack
Check for blockage or other foreign objects.
Scratch along surface of nozzle adapter
sealing surface, causing oil to leak and
loss of pressure to oil nozzle
See Table 2 on page 15 for replacement part number and
replace.
BURNER RUNS
CONTINOUSLY WITHOUT
SATISFYING CALL FOR
HEAT
Improper fuel or water in fuel
Drain fuel tank and fill with proper fuel.
Reduced fuel pressure
Check fuel pump pressure. Check that fuel filter is not
clogged, replace as necessary. Increase fuel pressure to
manufacturer's specifications. See Figure 25 on page 36 for
pump features. Replace pump if needed.
Soot build-up on heat exchanger.
Clean heat exchanger with soot remover.
Improper burner nozzle installed, nozzle
size too small.
Contact equipment manufacturer for proper nozzle size, and
replace. See page 23 for instructions.
BURNER RUNS BUT
EQUIPMENT IS
OVERHEATING
Fuel pump pressure too high
Readjust fuel pressure to equipment manufacturer's specs.
See Figure 25 on page 36 for pump features.
Oil primary control keeps energizing
burner past “call for heat”. (Applicable
only if burner comes with oil primary
control).
Identify control model. Replace Control, and wire accordingly
to Figure 3 on page 16.
Faulty fuel pump shut-off valve
Replace fuel pump shut-off valve.
Defective flow switch or
Thermostat
Replace.
Incorrect fuel nozzle size, nozzle size
too big
Contact equipment manufacturer for proper nozzle size, and
replace. See page 23 for instructions.
BURNER MOTOR WILL
NOT RUN
Faulty oil primary control. (Applicable
only if burner comes with oil primary
control).
Observe burner sequence of operations. Check voltage going
to the burner motor if it does not run during the 15 second
trial for ignition, replace control.
Fuel pump seized
Replace fuel pump. See Figure 1 on page 13 for replacement
parts
Burner fan loose or misaligned
Identify fan part number by measuring the outside diameter of
the fan. Then reference Table 1 on page 14 and position the
fan spacing according to Figure 26 on page 36 and tighten
set screw.
Defective control switch
Replace switch.
Loose wire
Check and replace or tighten wiring.
