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NORA Oilheat Technicians Manual

15-8 Service Procedures D. Burner fires but shuts off on safety 1. If a stack relay is installed: • Check the helix, clean and/or reposition as necessary. • Check that there is sufficient temperature in the flue. 2. If a cad cell control is installed: • Check the cell, clean and re-position as necessary. • Check the air tube and end cone, clean/replace as necessary. 3. Check for water or air in the nozzle line: • If water is found, drain it from the tank and lines 3. If there is no flow, check the oil solenoid valve and bleed the pump. 4. If the pump cannot be primed, make sure all valves are open and check for oil (Stick the tank, the gauge may be wrong). 5. If there is sufficient oil, check the oil filter and perform a vacuum test (see Chapter 4), the oil line or tank vent may be clogged. 6. If the vacuum is high, clean the oil line with a push-pull pump. 7. If the vacuum is low, check the coupling. 8. If the coupling is good, check the pump strainer. 9. If everything checks OK, perform a complete pump test (see Chapter 4.) B. Motor runs with oil flow but no ignition 1. Check the electrodes/porcelains/ ignition cables for defects. 2. Check the electrode setting and nozzle position. 3. Check the transformer connections. 4. Verify that correct primary voltage is supplied to ignition transformer/igniter. C. Motor runs with oil pressure and ignition but no flame 1. Check the nozzle and replace if plugged. 2. Check the oil pressure, set to manufacturer specs. 3. Check the air settings—adjust as necessary (too much air can “blow out” the flame.) Chapter 15 Service Procedures Nozzle gauge Checking oil pressure


NORA Oilheat Technicians Manual
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