24
TROUBLE- SHOOTING
Continued
OBSERVED | POSSIBLE |
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PROBLEM | CAUSE | REMEDY | |||
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Burner does not light | 1. | Burner orifice is | 1. | Clean burner (see Clean- | |
after ODS/pilot is lit |
| clogged |
| ing and Maintenance, | |
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| page 22) or replace burner | |
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| orifice | |
| 2. | Burner orifice diameter | 2. | Replace burner orifice | |
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| is too small |
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| 3. | Inlet gas pressure is | 3. | Contact local natural gas | |
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| too low |
| company | |
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Delayed ignition of | 1. | Manifold pressure is | 1. | Contact local natural gas | |
burner |
| too low |
| company | |
| 2. | Burner orifice is | 2. | Clean burner (see Clean- | |
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| clogged |
| ing and Maintenance, | |
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| page 22) or replace burner | |
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| orifice | |
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Burner backfiring | 1. | Burner orifice is | 1. | Clean burner (see Clean- | |
during combustion |
| clogged or damaged |
| ing and Maintenance, | |
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| page 22) or replace burner | |
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| orifice | |
| 2. | Burner damaged | 2. | Replace burner | |
| 3. | Gas regulator defective | 3. | Replace gas regulator | |
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Yellow flame during | 1. Not enough air | 1. | Check burner for dirt and | ||
burner combustion |
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| debris. If found, clean | |
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| burner (see Cleaning and | |
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| Maintenance, page 22) | |
| 2. | Gas regulator defective | 2. | Replace gas regulator | |
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Slight smoke or odor | 1. Residues from manu- | 1. | Problem will stop after a | ||
during initial opera- |
| facturing processes |
| few hours of operation | |
tion |
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Heater produces a | 1. Turning control knob | 1. | Turn control knob to LO | ||
whistling noise when |
| to HI position when |
| position and let warm up | |
burner is lit |
| burner is cold |
| for a minute | |
| 2. | Air in gas line | 2. | Operate burner until air is | |
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| removed from line. Have | |
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| gas line checked by local | |
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| natural gas company | |
| 3. | Air passageways on | 3. | Observe minimum installa- | |
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| heater blocked |
| tion clearances (see Figure | |
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| 4, page 10) | |
| 4. | Dirty or partially | 4. | Clean burner (see Clean- | |
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| clogged burner orifice |
| ing and Maintenance, | |
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| page 22) or replace burner | |
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| orifice | |
103873