Desa FB-10BA installation manual Maintenance

OBSERVED PROBLEM

POSSIBLE CAUSE

REMEDY

Burner does not light after ODS/pilot is lit

1.

Burner orifice is clogged

1.

Clean burner orifice (see Cleaning and

Maintenance, page 13) or replace burner

orifice

2.

Burner orifice diameter is too small

2.

Replace burner orifice

3.

Inlet gas pressure is too low

3.

Contact local propane/LP gas company

Delayed ignition of burner

1.

Manifold pressure is too low

1.

Contact local propane/LP gas company

2.

Burner orifice is clogged

2.

Clean burner orifice (see Cleaning and

Maintenance, page 13) or replace burner

orifice

Burner backfiring during combustion

1.

Burner orifice is clogged or damaged

1.

Clean burner orifice (see Cleaning and

Maintenance, page 13) or replace burner

orifice

2.

Burner damaged

2.

Replace burner

3.

Gas regulator defective

3.

Replace gas regulator

Yellow flame during burner combustion

1.

Not enough air

1.

Check burner for dirt and debris. If

found, clean burner (see Cleaning and

Maintenance, page 13)

2.

Inlet gas pressure is too low

2.

Contact local propane/LP gas company

3.

Gas regulator defective

3.

Replace gas regulator

Slight smoke or odor during initial operation

1.

Residues from manufacturing processes

1.

Problem will stop after a few hours of

operation

Heater produces a whistling noise when

1.

Turning control knob to HIGH position

1.

Turn control knob to LOW position and

burner is lit

when burner is cold

let warm up for a minute

2.

Air in gas line

2.

Operate burner until air is removed from

line. Have gas checked by local propane/

LP gas company

3.

Air passageways on heater blocked

3.

Observe minimum installation clear-

ances (see Figure 4, page 7)

4.

Dirty or partially clogged burner orifice

4.

Clean burner (see Cleaning and Mainte-

nance, page 13) or replace burner orifice

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