Chapter 15 Service Procedures Chapter 15—Service Procedures 15-13 cycles and raise all the thermostats to get it to start. Some heating system noises originate in the area near the heating system, but can only be heard in the living area. Noises can come from: • Worn pump gears • High vacuum • Air in oil line • Oil lines in contact with each other, boiler/furnace jacket, beams, or other items • Air in a hot water heating system • Electrical circuit—hum from relays, transformers, motors, etc • Improper control settings (too much pressure or temperature) • Circulators • Blowers • Zone valves • Loose covers on controls • Water pipes • Heating pipes and baseboard • Chimneys Conclusion Much of what you learn about troubleshooting will be due to your on-the-job experiences. We hope that you will remember the “5 Whys” and always look beyond the symptoms for the cause. A final piece of troubleshooting advice: “Listen, look and think before you rip, tear and destroy.” The following Troubleshooting charts were provided by Beckett Corp. and Riello. We thank them for allowing . us to share them with you.
NORA Oilheat Technicians Manual
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