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A. 6.5 inches B. 5.0 inches C. 4.5 inches D. 5.5 inches 4. The condensate drain trap on the Daikin 90 Plus furnace must be primed prior to furnace start up. A. True B. False 5. In a “horizontal right side down” drain trap conversion, hose number 5 is cut at line ___.
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7. When venting a Daikin 90 Plus furnace, it’s ok to connect to an existing type B, BW, or L metal flue pipe as long as the first 10 feet of flue pipe is PVC. A. True B. False (Never connect PVC to metal when constructing a 90 Plus flue) 8.
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A. Less than 2 ohms B. 10 ohms or less C. 5 ohms D. 2 ohms 13. When grounding a Daikin 90 Plus furnace in a basement, it’s ok to use a section of gas pipe as a ground. A. True B. False (Ground from the furnace ground screw all the way back to electrical panel;...
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19. The gas manifold pressure should be measured and adjusted with the burners firing. A. True B. False 20. The temperature rise on a Daikin 90 Plus furnace can be adjusted by the blower speed. Decrease the blower speed to _____ temperature rise.
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24. The first step when checking total external static pressure would be to _________________________. A. Install inclined manometer, magnehelic, or digital manometer. B. Turn the furnace on to “fan on.” C. Inspect/ replace filter in the furnace. D. Turn the furnace to the highest heat setting. 25.