44 PNEG-308 Purafire
12. Troubleshooting Guide
Possible Cause Corrective Action
13. Low gas flow/low operating pressure (two (2) or three (3) flashes).
1. Air in gas line. 1. Purge gas line.
2. High-pressure regulator (malfunction). 2. Check regulator output setting, relief vent blockage, water or
ice accumulation, regulator seat sticking or
undersized regulator.
3. Closed or partially closed gas supply cock(s). 3. Check gas supply line to ensure all gas cocks are fully open.
4. Gas supply piping undersized. 4. Analyze gas supply distribution system for proper sizing.
5. Improper fuel. 5. Check heater nameplate for gas type (LP or NG).
6. Improper manifold pressure. 6. Check automatic gas valve regulator setting for compliance
with heater nameplate.
7. Blockage between automatic gas valve and orifice. 7. Check gas way between automatic gas valve and orifice
outlet and clean, as required.
8. Burner flow restriction. 8. Clean burner passageway.
9. Orifice alignment. 9. Check for proper orifice alignment.
10. Dirt or sediment in automatic gas valve. 10. Clean and replace all gas supply lines and install a sediment
trap at the heater’s gas inlet. ALL AUTOMATIC GAS
VALVES INSTALLED ON CONTAMINATED SUPPLY
LINES WITHOUT SEDIMENT TRAPS MUST
BE REPLACED.
14. Burner does not shut off.
1. Dirt or sediment in automatic gas valve. 1. Clean or replace all gas supply lines and install a sediment
trap at the heater’s gas inlet. ALL AUTOMATIC GAS VALVES
INSTALLED ON CONTAMINATED SUPPLY LINES
WITHOUT SEDIMENT TRAPS MUST BE REPLACED.
2. Defective automatic gas valve. 2. Replace automatic gas valve but check supply pressure to
insure gas pressure is below 14" W.C. (1/2 PSI).
To Next Page
Loading...
