Trane GHND-SVX01A-EN L. Rapid burner cycling.

40 High Efficiency Propeller Fan Gas Unit Heater • GHND-SVX01A-EN

Trouble Shooting

• Check operation at valve. Look for short (such as staples piercing thermostat

wiring), and correct.

• Replace gas valve.

• Refer to “Operation”.

L. Rapid burner cycling.

POSSIBLE CAUSE(S)

1. Loose electrical connections at gas valve or thermostat.

2. Excessive thermostat heat anticipator.

3. Unit cycling on high limit.

4. Poor thermostat location.

5. Draft on Pilot.

6. Defective ignitor control (if applicable).

7. Unit cycling on high limit.

8. Defective high limit switch.

CORRECTIVE ACTION

• Tighten all electrical connections.

• Adjust thermostat heat anticipator for longer cycles. Refer to “Operation”.

Contents

Main Preface and Warnings and Cautions Contents Model Number Description Model Number Description Description General Information General Safety Information General Safety Information Hazardous Service Procedures! Altering Unit! Hazardous Voltage and Gas! General Information General Safety Information Ground Wire! Flammable Vapors! Note 1. Ratings shown are for unit installations Page Installation Page Page Clearances: Page Flammable Vapors! Pipe Sizing Hazard of Explosion and Fire! Gas Supply Piping Gas Pipe Size Table 3. Gas Supply Piping Pipe Installation Pipe Installation Hazard of Explosion of Fire! Hazard of Explosion! Pipe Installation Electrical Connections Hazardous Voltage! Ground Wire! Thermostat Wiring and Location Electrical Connections Thermostat wiring and location THERMOSTAT HEAT ANTICIPATOR ADJUSTMENTS: FAN TIME DELAY CONTROL Carbon Monoxide Poisoning! Venting for Power Vented Unit Heaters Page Equipment Damage! Carbon Monoxide Poisoning! Page Page Page Operation POWER VENTED PROPELLER UNITS INTERMITTENT (SPARK) PILOT IGNITION Page Page Gas Input Rate GAS INPUT RATE Gas Pressure Adjustments Table 6. Main burner orifice schedule PRIMARY AIR SHUTTER ADJUSTMENT PILOT ADJUSTMENT MANIFOLD PRESSURE ADJUSTMENT Maintenance Hazardous Service Procedures! Periodic Service Combustible Materials! Hazardous Voltage and Gas! Trouble Shooting Trouble Shooting Guide: A. Flame lifting from burner ports. B. Flame pops back. C. Noisy flame. D. Yellow tip flame (some yellow tipping on propane gas is permissible). E. Floating flame. F. Gas Odor. G. Delayed ignition. H. Failure to Ignite. J. Condensation of water vapor. K. Burner won't turn off. L. Rapid burner cycling. Page P. Fan motor turns on and off while burner is operating. Q. Fan motor will not stop. R. Not enough heat. T. Too much heat. U. Cold air is delivered on start up. V. Cold air is delivered during heater operation. W. No Spark. X. Spark present but pilot does not light. Y. Pilot lights Main valve does not energize. Z. Hi-Limit switch tripping. AA. Noisy power venter. BB. Power venter will not run. CC. Power venter motor turns on and off while burner is operating. DD. Power ventor motor will not stop. Part Identification Page Figure 24. Power vent assembly Part Identification Installation of Power Vented Motor INSTALLATION INSTRUCTIONS FOR FIELD REPLACEMENT OF POWER VENTER MOTOR Hazardous Voltage and Gas! Page Gas Equipment Start-Up PRE-INSPECTION INFORMATION GENERAL (with power and gas off) Gas Equipment Start-Up BLOWER (with power on and gas off) Remarks: GAS HEATING (with power and gas on)