TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | |||
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Pilot lights but flame goes out | 1. Gas control knob not fully | 1. | Press in gas control knob | ||
when control knob is released | 2. | pressed in | 2. | fully | |
| Gas control knob not pressed | After pilot lights, keep gas | |||
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| in long enough |
| control knob pressed in 30 | |
| 3. | Equipment shutoff valve not | 3. | seconds | |
| Fully open equipment shutoff | ||||
| 4. | fully open | 4. | valve | |
| Pilot flame not touching | A) Contact local natural or | |||
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| thermocouple, which allows |
| propane/LP gas company | |
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| thermocouple to cool, caus- |
| B) Clean pilot (see Cleaning | |
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| ing pilot flame to go out. This |
| and Maintenance, page 33) | |
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| problem could be caused by |
| or replace pilot assembly | |
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| one or both of the following: |
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| A) Low gas pressure |
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| B) Dirty or partially clogged |
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| 5. | pilot | 5. | Hand tighten until snug, then | |
| Thermocouple connection | ||||
| 6. | loose at control valve | 6. | tighten 1/4 turn more | |
| Thermocouple damaged | Replace pilot assembly | |||
| 7. | Control valve damaged | 7. | Replace control valve | |
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Burner does not light after pilot | 1. Burner orifice clogged | 1. | Clean burner (see Cleaning | ||
is lit |
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| and Maintenance, page 33) or | |
| 2. | Inlet gas pressure is too low | 2. | replace burner orifice | |
| Contact local propane/LP or | ||||
| 3. | Thermopile leads disconnect- | 3. | natural gas company | |
| Reconnect leads to TP & TPTH | ||||
| 4. | ed or improperly connected | 4. | terminals on control valve | |
| Thermopile is defective | Replace thermopile | |||
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Delayed ignition burner | 1. Manifold pressure is too low | 1. | Contact local propane/LP or | ||
| 2. | Burner porting or orifice | 2. | natural gas company | |
| Clean burner (see Cleaning | ||||
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| clogged |
| and Maintenance, page 33) or | |
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| replace burner orifice | |
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Burner backfiring during com- | 1. Burner orifice is clogged or | 1. | Clean burner (see Cleaning | ||
bustion |
| damaged |
| and Maintenance, page 33) or | |
| 2. | Damaged burner | 2. | replace burner orifice | |
| Replace damaged burner | ||||
| 3. | Gas regulator defective | 3. | Replace gas control |
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Slight smoke or odor during initial | 1. Residues from manufacturing | 1. | Problem will stop after a few | ||
operation |
| processes and logs curing |
| hours of operation | |
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Heater produces a whistling noise | 1. Turning gas control knob to | 1. | Turn gas control knob to LO | ||
when burner is lit |
| HI position when burner is |
| position and let warm up for a | |
| 2. | cold | 2. | minute | |
| Air in gas line | Operate burner until air is | |||
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| removed from line. Have gas | |
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| line checked by local propane/ | |
| 3. | Dirty or partially clogged | 3. | LP or natural gas company | |
| Clean burner (see Cleaning | ||||
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| burner orifice |
| and Maintenance, page 33) or | |
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| replace burner orifice | |
36 | www.desatech.com |