Dayton Operating Instructions and Parts Manual | 3VH19 |
Dayton® Natural Gas
Construction Heater
Troubleshooting Chart
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| Never attempt to service heater while it is connected to gas supply, operating, or hot. Severe burns can |
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| Symptom | Possible Cause(s) | Corrective Action |
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| Pilot fails to light | 1. Natural gas supply valve closed on gas | 1. Open natural gas supply valve slowly |
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| supply |
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| 2. Allow several minutes to purge air with |
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| 2. Air in gas line | automatic control valve button depressed |
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| 3. Blockage in pilot orifice | 3. Replace pilot orifice |
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| 4. Piezo ignition system not sparking | 4. Adjust ignitor electrode gap to .120". |
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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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| Pilot lights but goes out when control | 1. Not enough | 1. Relight, hold automatic control valve |
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| valve knob is released |
| button in 45 seconds |
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| 2. Low gas pressure | 2. Check natural gas for proper gas 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. Control valve needs to be replaced | 4. Replace control valve |
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| Maximum Burn rate is low; | 1. Main burner valve not fully open | 1. Fully open main burner valve by turning |
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| Emitter not glowing |
| the valve handle towards ON position |
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| until it stops |
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| 2. Plugged gas orifices |
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| 2. Replace gas orifice |
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| 3. Low gas pressure |
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| 3. Consult natural gas supplier; check |
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| regulator output |
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| Soot forming inside heater, | 1. Main burner valve not fully open | 1. Adjust main burner valve slowly |
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| flame 100% yellow |
| towards ON position |
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| 2. Low gas pressure | 2. Consult natural gas supplier |
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Flames are extremely high. Coming out of louvers
1.Unit was connected to LP gas instead of natural gas
1.Check gas source, replace with natural gas supply
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