Desa Comfort Glow CGB3930NRA Owner's Operation And Installation Manual page 20

UNVENTED NATURAL GAS LOG HEATER
TROUBLESHOOTING
Continued
OBSERVED PROBLEM POSSIBLE CAUSE REMEDY
Burner does light after ODS/pilot is lit 1. Burner orifice clogged
1. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
2. Inlet gas pressure is too low 2. Contact local natural gas company
3. Burner orifice diameter is too small 3. Replace burner orifice
4. Thermopile leads disconnected or im- 4. Reconnect leads (see Wiring Diagram,
properly connected page 27)
5. Burners will not come on in remote 5. Replacebatteryintransmitterandreceiver
position
Delayed ignition burner 1. Manifold pressure is too low 1. Contact local natural gas company
2. Burner orifice clogged 2. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
Burner backfiring during combustion 1. Burner orifice is clogged or damaged l. Clean burner (see Cleaning and Mainte-
nance, page 18) or replace burner orifice
2. Damaged burner 2. Replace damaged burner
3. Gas regulator defective 3. Replace gas control
Slight smoke or odor during initial operation 1. Not enough air 1. Check burner for dirt and debris. If
found, clean burner (see Cleaning and
Maintenance, page 18)
2. Gas regulator defective 2. Replace gas control
3. Residues from manufacturing processes 3. Problem will stop after a few hours of
and logs curing operation
Moisture/condensationnoticedonwindows 1. Noteooughcombustion/ventilationair 1. Refer to Air for Combustion and Venti-
lation requirements (page 4)
Heater produces a whistling noise when 1. Turning control knob to HI position 1. Turn control knob to LO 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
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice
line. Have gas line checked by local
natural gas company
3. Observe minimum installation clear-
ances (see pages 7 through 9)
4. Cleanburner(seeCleaningandMainte-
nance, page 18) or replace burner orifice
Whitepowderresidueformingwithinburner 1. When heated, vapors form furniturepol- l. Turn heater off when using furniture
box or on adjacent walls or furniture ish, wax, carpet cleaners, etc. turn into polish, wax, carpet cleaners or similar
white powder residue products
Remote does not function 1. Battery is not installed. Battery power I. Replace 9-volt batteries in receiver and
is low remote control
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