TROUBLESHOOTING
Continued
OBSERVED PROBLEM | POSSIBLE CAUSE | REMEDY | ||
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ODS/pilot lights but flame | 1. Pilot knob not fully pressed in | 1. | Press in pilot knob fully | |
goes out when control knob is | 2. Pilot knob not pressed in long | 2. After ODS/pilot lights, keep pi- | ||
released |
| enough |
| lot knob pressed in 30 seconds |
| 3. | Equipment shutoff valve not | 3. | Fully open equipment shutoff |
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| fully open |
| valve |
| 4. | Thermocouple connection | 4. | Hand tighten until snug, then |
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| loose at control valve |
| tighten 1/4 turn more |
| 5. | Pilot flame not touching ther- | 5. | A) Contact local natural or |
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| mocouple, which allows ther- |
| propane/LP gas company |
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| mocouple to cool, causing |
| B) Clean ODS/pilot (see |
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| pilot flame to go out. This |
| Cleaning and Maintenance, |
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| problem could be caused by |
| page 16) or replace ODS/pilot |
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| one or both of the following: |
| assembly |
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| A) Low gas pressure |
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| B) Dirty or partially clogged |
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| ODS/pilot |
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| 6. | Thermocouple damaged | 6. | Replace pilot assembly |
| 7. | Valve damaged | 7. | Replace valve |
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Burner(s) does not light after | 1. Burner orifice(s) is clogged | 1. | Clean burner orifice(s) (see | |
ODS/pilot is lit |
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| Cleaning and Maintenance, page |
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| 16) or replace burner orifice(s) |
| 2. | Inlet gas pressure is too low | 2. | Contact local natural or pro- |
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| pane/LP gas company |
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Delayed ignition of burner(s) | 1. Manifold pressure is too low | 1. | Contact local natural or pro- | |
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| pane/LP gas company |
| 2. | Burner orifice(s) is clogged | 2. | Clean burner orifice(s) (see |
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| Cleaning and Maintenance, page |
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| 16) or replace burner orifice(s) |
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Burner backfiring during com- | 1. Burner orifice(s) is clogged or | 1. | Clean burner orifice(s) (see | |
bustion |
| damaged |
| Cleaning and Maintenance, page |
| 2. | Burner damaged |
| 16) or replace burner orifice(s) |
| 2. | Replace burner | ||
| 3. | Gas regulator defective | 3. | Replace gas regulator |
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Burner plaque(s) does not glow | 1. Plaque damaged | 1. | Replace burner | |
| 2. | Inlet gas pressure is too low | 2. | Contact local natural or pro- |
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| pane/LP gas company |
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Slight smoke or odor during | 1. Residues from manufacturing | 1. | Problem will stop after a few | |
initial operation |
| processes |
| hours of operation |
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Heater produces a clicking/tick- | 1. Metal expanding while heating | 1. | This is common with most heat- | |
ing noise just after burner is lit |
| or contracting while cooling |
| ers. If noise is excessive, contact |
or shut off |
|
|
| qualified service person |
18 | www.desatech.com |
