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| OBSERVED | POSSIBLE |
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| PROBLEM | CAUSE | SOLUTION | ||||
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| Burner does not light after ODS/ | 1. | Burner orifice is clogged | 1. | Clean burner (see Cleaning | ||
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| Pilot is lit |
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| and Maintenance) or replace | ||
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| burner orifice | ||
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| 2. | Inlet gas pressure is too low | 2. | Contact local propane gas | ||
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| company | ||
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| Delayed ignition of burner | 1. | Manifold pressure is too low | 1. | Contact local propane gas | ||
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| company | ||
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| 2. | Burner orifice is clogged | 2. | Clean burner (see Cleaning | ||
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| and Maintenance) or replace | ||
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| burner orifice | ||
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| Burner backfiring during | 1. | Burner orifice is clogged or | 1. | Clean burner (see Cleaning | ||
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| combustion |
| damaged |
| and Maintenance) or replace | ||
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| burner orifice | ||
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| 2. | Burner damaged | 2. | Replace burner | ||
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| 3. | Gas regulator defective | 3. | Replace gas regulator | ||
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| Slight smoke or odor during | 1. | Residues from manufacturing | 1. | Problem will stop after a few | ||
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| initial operation |
| process |
| hours of operation | ||
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| Heater produces a whistling | 1. | Turning control knob to “HI” | 1. | Turn control knob to “LOW” | ||
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| noise when burner is lit |
| position when burner is cold |
| position and allow to warm | ||
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| (if equipped with this type of |
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| valve) |
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| 2. | Air in gas line | 2. | Operate burner until air is | ||
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| removed from line. Call | ||
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| local propane company to | ||
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| check gas line. | ||
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| 3. | Air passageways on heater | 3. | Observe minimum | ||
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| blocked |
| installation clearances | ||
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| 4. | Dirty or partially clogged | 4. | Clean burner or replace | ||
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| burner orifice |
| orifice | ||
Page 39