Desa DVFE34 - Manual (Page 28)

28 107205
DIRECT-VENT FIREPLACE
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TROUBLESHOOTING
Continued
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OBSERVED PROBLEM
Delayed ignition burner
Burner backfiring during combustion
Slight smoke or odor during initial operation
Heater produces a whistling noise when
burner is lit
Glass soots
Fireplace produces a clicking/ticking noise
just after burners are lit or shut off
REMEDY
1. Contact local natural gas company
2. Clean burner (see Cleaning and Main-
tenance, page 26) or replace burner orifice
1. Clean burner (see Cleaning and
Maintenance, page 26) or replace burner
orifice
2. Replace damaged burner
3. Replace gas control
1. Problem will stop after a few hours of
operation
1. Operate burner until air is removed from
line. Have gas line checked by local
natural gas company
2. Clean burner (see Cleaning and
Maintenance, page 26) or replace burner
orifice
1. Adjust the log set so that the flame does
not excessively impinge on it
2. Inspect the opening at the base of the
burner to see that it is NOT packed with
any type of material
1. This is common. If noise is excessive,
contact qualified service person
POSSIBLE CAUSE
1. Manifold pressure is too low
2. Burner porting or orifice clogged
1. Burner orifice is clogged or damaged
2. Damaged burner
3. Gas regulator defective
1. Residues from manufacturing processes
and logs curing
1. Air in gas line
2. Dirty or partially clogged burner orifice
1. Flame impingement on logs
2. Debris around burner air mixer
1. Metal expanding while heating or con-
tracting while cooling