Trane GHND-SVX01A-EN - Manual (Page 36)

36 GHND-SVX01A-EN • High Efficiency Propeller Fan Gas Unit Heater
Trouble Shooting Guide:
A. Flame lifting from burner ports.
POSSIBLE CAUSE(S)
1. Pressure regulator set too high.
2. Defective Regulator.
3. Burner orifice too large.
CORRECTIVE ACTION
• Reset manifold pressure. Refer to "Operation".
• Replace regulator section of combination gas valve or complete valve.
• Check with local gas supplier for proper orifice size and replace. Refer to
“Operation”.
B. Flame pops back.
POSSIBLE CAUSE(S)
1. Excessive primary air.
2. Burner orifice too small.
CORRECTIVE ACTION
• Close air shutter. Refer to “Operation”.
• Check with local gas supplier for proper orifice size and replace. Refer to
“Operation”.
C. Noisy flame.
POSSIBLE CAUSE(S)
1. Too much primary air.
2. Noisy pilot.
3. Irregular orifice causing whistle or resonance.
4. Excessive gas input.
CORRECTIVE ACTION
• Close air shutter.
• Reduce pilot gas. Refer to “Operation”.
• Replace orifice.
Trouble Shooting