80,000 BTU/HR
PROPANE CONSTRUCTION HEATER
TROUBLESHOOTING
Note: For additional help, call DESA International’s Technical Service Department at
WARNING: Never attempt to service heater while it is connected to propane supply, operating, or hot. Severe burns can occur.
SYMPTOM | POSSIBLE CAUSE | REMEDY | ||
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 |
| 3. | Blockage in burner orifice | 3. | Replace burner orifice |
| 4. | Piezo ignition system not sparking | 4. | Check to assure ignitor electrode gap is |
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| .195" Check wire lead for damage. Re- |
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| place piezo ignitor and/or ignitor elec- |
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| trode as necessary |
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Burner lights but goes out when automatic | 1. | Not enough warm up time | 1. | Relight, hold automatic control valve |
control valve button is released |
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| button in 45 seconds |
| 2. | Low gas pressure | 2. | Check propane tank(s) for proper gas |
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| supply |
| 3. | Thermocouple loose or needs to be | 3. | Tighten connection or replace thermo- |
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| replaced |
| couple |
| 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. | Control valve is on LOW | 1. | Push and turn valve counter clockwise |
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| to MED or HIGH |
| 2. | Plugged gas orifice | 2. | Replace gas orifice |
| 3. | Low gas pressure | 3. Check gas supply; check regulator | |
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|
|
| output |
| 4. | Low fuel supply | 4. | Consult propane gas supplier |
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6 | 103385 |
