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UNVENTED NATURAL GAS FIREPLACE
TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
One or both burners do not light after ODS/ | 1. | Burner orifice(s) clogged | 1. | Clean burner(s) (see Cleaning and Main- |
pilot is lit |
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| tenance, page 18) or replace burner |
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| orifice(s) |
| 2. | Burner orifice(s) diameter is too small | 2. | Replace burner orifice(s) |
| 3. | Inlet gas pressure is too low | 3. | Contact local natural gas company |
| 4. | Mislocated crossover tube | 4. | Contact qualified service person |
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Delayed ignition of one or both burners | 1. | Manifold pressure is too low | 1. | Contact local natural gas company |
| 2. | Burner orifice(s) clogged | 2. | Clean burner(s) (see Cleaning and Main- |
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| tenance, page 18) or replace burner |
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| orifice(s) |
| 3. | Mislocated crossover tube | 3. | Contact qualified service person |
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Burner backfiring during combustion | 1. | Burner orifice is clogged or damaged | 1. | Clean burner (see Cleaning and Mainte- |
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| nance, page 18) or replace burner orifice |
| 2. | Damaged burner | 2. | Replace damaged burner |
| 3. | Gas regulator defective | 3. | Replace gas regulator |
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Yellow flame in front burner during burner | 1. | Not enough air | 1. | Check burner(s) for dirt and debris. If |
combustion |
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| found, clean burner(s) (see Cleaning and |
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| Maintenance, page 18) |
| 2. | Gas regulator defective | 2. | Replace gas regulator |
Slight smoke or odor during initial operation 1. Residues from manufacturing processes and logs curing
1.Problem will stop after a few hours of operation
Fireplace produces a whistling noise when 1. | Turning control knob to HI position | 1. | Turn control knob to LO position and |
burners are lit | when burners are cold |
| let warm up for a minute |
2. | Air in gas line | 2. | Operate burners until air is removed |
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| from line. Have gas line checked by lo- |
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| cal natural gas company |
3. | Air passageways on fireplace blocked | 3. | Observe minimum installation clear- |
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| ances (see pages 8 through 10) |
4. | Dirty or partially clogged burner | 4. | Clean burners (see Cleaning and Main- |
| orifice(s) |
| tenance, page 18) or replace burner |
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| orifice(s) |
White powder residue forming within burner box or on adjacent walls or furniture
1.When heated, vapors from furniture pol- ish, wax, carpet cleaners, etc. turn into white powder residue
1.Turn heater off when using furniture polish, wax, carpet cleaners, or similar products
Dark residue on logs or inside of fireplace | 1. | Improper log placement | 1. | Properly locate logs (see Installing Logs, |
Note: After removing all causes of residue |
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| page 13) |
deposits, completely clean fireplace and ap- | 2. | Drafts or other air currents affecting | 2. | Eliminate source of drafts around heater |
pliance of all residue before reusing appliance. |
| flame pattern |
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| 3. | Air holes at burner inlet blocked | 3. | Clean out air holes at burner inlet. Peri- |
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| odically repeat as needed |
| 4. | Burner flame holes blocked | 4. | Remove blockage or replace burner |
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| Continued |
For more information, visit www.desatech.com | 20 | 107157 |
