Desa Tech CGD3924P - Manual (Page 27)

27
102991
TROUBLE-
SHOOTING
Continued
OBSERVED
PROBLEM
Burner does light
after ODS/pilot is lit
Delayed ignition of
burner
Burner backfiring
during combustion
Slight smoke or
odor during initial
operation
Moisture/condensa-
tion noticed on
windows
Heater produces a
whistling noise
when burner is lit
REMEDY
1. Clean burner (see
Cleaning and Mainte-
nance, page 25) or
replace burner orifice
2. Contact local propane
gas company
3. Replace burner orifice
1. Contact local natural gas
company
2. Clean burner (see
Cleaning and Mainte-
nance, page 25) or
replace burner orifice
1. Clean burner (see
Cleaning and Mainte-
nance, page 25) or
replace burner orifice
2. Replace damaged burner
3. Replace gas regulator
1. Check burner for dirt
and debris. If found,
clean burner (see
Cleaning and Mainte-
nance, page 25)
2. Replace gas regulator
3. Problem will stop after a
few hours of operation
1. Refer to Air for Com-
bustion and Ventilation
requirements (page 5)
1. Turn control knob to LO
position and let warm up
for a minute
2. Operate burner until air
is removed from line.
Have gas line checked
by local natural gas
company
3. Observe minimum
installation clearances
(see pages 9-12)
4. Clean burner (see
Cleaning and Maintenance,
page 25) or replace
burner orifice
POSSIBLE
CAUSE
1. Burner orifice clogged
2. Inlet gas pressure is
too low
3. Burner orifice diameter
is too small
1. Manifold pressure is
too low
2. Burner orifice clogged
1. Burner orifice is
clogged or damaged
2. Damaged burner
3. Gas regulator defective
1. Not enough air
2. Gas regulator defective
3. Residues from manu-
facturing processes
and logs curing
1. Not enough combus-
tion/ventilation air
1. Turning control knob
to HI position when
burner is cold
2. Air in gas line
3. Air passageways on
heater blocked
4. Dirty or partially
clogged burner orifice