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NORA Oilheat Technicians Manual

The actual efficiency of an oilheating system is affected by many factors, including: Installation factors: • Selection of burner/boiler or burner/furnace • Chimney design or upgrades • Boiler or furnace sizing • Boiler water or furnace air operating temperatures • Piping or ducting design • Burner adjustment • Isolated combustion air. Service procedures: • Barometric damper setting • Sealing air leaks into the boiler or furnace • Burner adjustment: (excess air and smoke) • Cleaning boiler or furnace heat transfer surfaces • Proper nozzle sizing. Other factors that affect efficiency: • Location of unit • Chimney Draft—height, materials, construction • Source of combustion and draft relief air • Burner design & operating pressure • Zoning of distribution system of the fuel it uses, can operate at 100 percent efficiency. Some heating energy is lost before it ever reaches the radiators, convectors or supply registers in the house. These losses reduce overall system effectiveness and increase fuel use. It is important we understand the many types of heat loss that reduce efficiency. Figure 16-1. Heat can be lost through: • Burner on-cycle • Burner off-cycle • Jacket or Casing • Pipes or Ducts, and • Air infiltration Chapter 16 Energy Conservation Figure 16-1: Flue heat loss (on and off cycles) Flue Heat Loss (on and Off Cycles Fuel Energy Jacket Heat Loss 16-4 Energy Conservation Useful Heat Delivered to Home Piping or Duct Heat Loss Air Infiltration Induced by the Heating System and Chimney


NORA Oilheat Technicians Manual
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