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NORA Oilheat Technicians Manual

• If air is found, perform pump tests to determine why. (Chapter 3) 4. Check air settings—adjust as necessary. E. Motor does not start 1. The motor might be off on thermal overload—if there is a reset, press it. If there is no reset, check to see if the motor feels hot; if it does, give it a few minutes to cool down. 2. If the motor still does not start, the trouble is in the motor or motor circuit. 3. If the motor has a capacitor, check it before you condemn the motor. #2 No heat—the unit is warm but no heat is circulating. If the oilburner operates properly but no heat comes from the radiation or ductwork, the problem is with the delivery system. Make sure that all thermostats are set to call for heat, verify that heat anticipators are properly set and: Hot water system 1. Check for closed hand or motorized valves. 2. Check that there is sufficient pressure in the system. 3. Check that the circulator is operating properly. 4. Check the flow control valve. 5. Check that the system is not air bound. 6. Check that the high limit is set properly. 7. Check that the reverse aquastat is set properly. Warm air system 1. Check that the fan-limit control is set properly. 2. Check that all dampers are open. 3. Check that air filters are clean. 4. Check to see if the blower is operating: • If it is, check the drive belt. • If it is not, check the motor. Steam system 1. Check the water level—too much water in the system will prevent steam from rising. 2. Check for closed hand or motorized valves. 3. Check the electrical circuits for motorized valves. 4. Check the main vents. 5. Check the pressuretrol setting. #3 Insufficient heat—the burner is operating but the house is much cooler than the thermostat setting Sometimes this occurs because it is much colder than normal and the house just cannot “keep up” with the outside temperature and/or the system (boiler, furnace, piping, radiation, ductwork) might be undersized. Chapter 15 Service Procedures The best Service Technicians develop standard troubleshooting routines. They go from step to step until they find and correct the cause of the problem. Chapter 15—Service Procedures 15-9


NORA Oilheat Technicians Manual
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