Procom FBNSD400T Series Owner's Operation And Installation Manual page 25

Problem
Burner does not light after
ODS/pilot is lit.
Delayed ignition of
burner.
Burner backfiring during
combustion.
High yellow flame during
burner combustion.
Gas odor during com-
bustion.
Slight smoke or odor
during initial operation.
Heater produces a whis-
tling noise when burner
is lit.
200246-01A
TROUBLESHOOTING
Possible Cause
1. Burner orifice is clogged.
2. Burner orifice diameter is too
small.
3. Inlet gas pressure is too low.
1. Manifold pressure is too low.
2. Burner orifice is clogged.
1. Burner orifice is clogged or
damaged.
2. Burner is damaged.
3. Gas regulator is damaged.
1. Not enough air.
2. Gas regulator is defective.
3. Inlet gas pressure is too low.
1. Foreign matter between
control valve and burner.
2. Gas leak. (See Warning
Statement at top of page 23).
1. Residues from manufactur-
ing process.
1. Turning control knob to high
position when burner is cold.
2. Air in gas line.
3. Air passageways on heater
are blocked.
4. Dirty or partially clogged
burner orifice.
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Corrective Action
1. Clean burner orifice (see
Care and Maintenance,
page 21) or replace burner
orifice.
2. Replace burner orifice.
3. Contact local gas supplier.
1. Contact local gas supplier.
2. Clean burner (see Care and
Maintenance, page 21) or
replace burner orifice.
1. Clean burner orifice (see
Care and Maintenance,
page 21) or replace burner
orifice.
2. Replace burner.
3. Replace gas regulator.
1. Check burner for dirt and
debris. If found, clean burner
(see Care and Maintenance,
page 21).
2. Replace gas regulator.
3. Contact local gas supplier.
1. Contact a qualified service
technician to remove foreign
matter.
2. Locate and correct all leaks
(see Checking Gas Connec-
tions, page 15).
1. Problem will stop after a few
hours of operation.
1. Turn control knob to low
position and let warm up for
a minute.
2. Operate burner until air is
removed from line. Have gas
line checked by local gas
supplier.
3 Observe minimum installa-
tion clearances (Figure 6,
page 12).
4 Clean burner (see Care and
Maintenance, page 21) or
replace burner orifice.
25