Dayton Operating Instructions and Parts Manual
Model 3VH22
Troubleshooting Chart
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| Never attempt to service heater while it is connected to propane supply, operating, or hot. Severe burns | |||
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Symptom | Possible Cause(s) | Corrective Action |
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Burner fails to light | 1. Propane supply valve closed on propane | 1. Open propane supply valve slowly | |||
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| tank(s) |
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| 2. Excess flow check valve closed | 2. Close propane supply valve on propane | |
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| tank and reopen slowly | |
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| 3. Blockage in burner orifice | 3. Replace burner orifice | |
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| 4. Piezo ignition system not sparking | 4. Assure ignitor electrode gap is .195". | |
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| Check wire lead for damage. Replace | |
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| piezo ignitor and/or ignitor electrode as | |
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| necessary | |
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Burner lights but goes out when auto- | 1. Not enough | 1. Relight, hold automatic control valve | |||
matic control valve button is released |
| button in 45 seconds | |||
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| 2. Low gas pressure | 2. Check propane tank(s) for proper gas | |
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| supply | |
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| 3. Thermocouple loose or needs to be | 3. Tighten connection or replace thermo- | |
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| replaced | couple | |
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| 4. Automatic control valve needs to be | 4. Replace automatic control valve | |
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| replaced |
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Burn rate is low | 1. Burner control is on Low | 1. Slightly depress control knob and rotate | |||
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| counterclockwise to the Medium or | |
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| High position | |
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| 2. Plugged gas orifice | 2. Replace gas orifice | |
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| 3. Low gas pressure | 3. Check gas supply; check regulator | |
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| output | |
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| 4. Low fuel supply | 4. Consult propane gas supplier | |
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