Dayton 3VH19 - Manual (Page 8)

Dayton Operating Instructions and Parts Manual
8
Dayton Natural Gas
Construction Heater ®
3VH19
Troubleshooting Chart
Symptom Possible Cause(s) Corrective Action
Pilot fails to light
Pilot lights but goes out when control
valve knob is released
Maximum Burn rate is low;
Emitter not glowing
Soot forming inside heater,
flame 100% yellow
Flames are extremely high. Coming out of
louvers
1. Natural gas supply valve closed on gas
supply
2. Air in gas line
3. Blockage in pilot orifice
4. Piezo ignition system not sparking
1. Not enough warm-up time
2. Low gas pressure
3. Thermocouple loose or needs to be
replaced
4. Control valve needs to be replaced
1. Main burner valve not fully open
2. Plugged gas orifices
3. Low gas pressure
1. Main burner valve not fully open
2. Low gas pressure
1. Unit was connected to LP gas instead of
natural gas
1. Open natural gas supply valve slowly
2. Allow several minutes to purge air with
automatic control valve button depressed
3. Replace pilot orifice
4. Adjust ignitor electrode gap to .120".
Check wire lead for damage. Replace
piezo ignitor and/or ignitor electrode as
necessary
1. Relight, hold automatic control valve
button in 45 seconds
2. Check natural gas for proper gas supply
3. Tighten connection or replace thermo-
couple
4. Replace control valve
1. Fully open main burner valve by turning
the valve handle towards ON position
until it stops
2. Replace gas orifice
3. Consult natural gas supplier; check
regulator output
1. Adjust main burner valve slowly
towards ON position
2. Consult natural gas supplier
1. Check gas source, replace with natural
gas supply
Never attempt to service heater while it is connected to gas supply, operating, or hot. Severe burns can
occur.