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NORA Oilheat Technicians Manual

Figure 6-9: Water heater stack connections Figure 6-10: Water heater stack connections 10' or Less ¼" Rise/Running foot Chapter 6—Draft and Venting 6-13 inspection. If any chimney damage or deterioration that would inhibit the safe operation of the heating appliance is found, the owner of the building should be notified immediately. A qualified chimney professional should be called-in for a follow-up inspection. See Figure 6-11 on following page. The chimney check should include the following: • If there is one, visually inspect the clean-out at the base of the chimney for excessive or abnormal debris. Be sure the clean out door is shut tight and sealed when you are finished. • Remove the flue pipe from the chimney breech and inspect the inside of the chimney with a light and a flame mirror for signs of damage or deterioration. Debris, mortar, brick, and pieces of liner material at the base of the chimney are signs of trouble. • Go outside, walk around the building, and observe the exterior of the chimney. If you observe damage, deterioration, or that the chimney is leaning to one side; further inspection by a chimney professional is required. Chimney caps and draft inducers Chimneys may suffer variable draft due to changes in wind or air turbulence A Figure 6-12: Chimney cap simple and inexpensive solution to this problem is to install a cap (Figure 6-12) or hood over the top of the chimney. However, these caps can rust and discolor roofs, so ensure that a high grade stainless steel is used. Chapter 6 Draft and Venting Each section sized to handle combination of all appliances attached The larger appliance firing rate enters the chimney below the smaller appliance firing rate Draft Regulators “Y” Connector Heating Plant Water Heater Water Heater (Lower gph) Boiler/Furnace (Higher gph)


NORA Oilheat Technicians Manual
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