Desert Aire SelectAire Plus SP Series, Installation And Operation Manual

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Desert Aire - SP Manual
• You must tightly seat all joints of the vent. The inside of the vent should be free of all obstructions.
• All vents and vent connections must fit tightly to avoid air leaks.
• All vent connectors connecting the furnace to the vent must be rigidly supported with hangers and
straps, in order to prevent sagging and movement after installation. The vent connector must be
supported every four feet for the design and weight of the material used, to maintain clearances,
and to prevent physical damage. The vent pipe must slope upward 1/4” minimum for each foot of
horizontal run away from the furnace.
• Vent connectors used in connecting the furnace to the vent cannot be channeled through floors,
ceilings, and walls without the proper protective construction. This construction must be in
accordance with the requirements of the National Fuel Gas Code (ANSI Z223.1 latest edition).
• The venting system must be installed to avoid possible contact with concealed plumbing or
electrical wiring.
• In addition to following the requirements outlined by local codes, follow the guidelines below when
locating the vent terminal to help ensure trouble-free operation of your horizontally vented burner.
• Avoid locating the vent terminal on a wall facing the prevailing winds or wideopen areas. When
this is not practical, choose locations that protect the vent from strong wind, such as behind a
fence or hedge. (Note: the vent terminal must be located a sufficient distant from bushes, shrubs
and vegetation so as not to have the flue products restricted or blocked by such vegetation.).
• In areas with considerable snowfall, locate the vent terminal higher than the recommended
minimum 12 inches above the ground as protection from blockage by snow accumulation or
drifting.
• Locating the vent terminal as close as possible to the outside corner of a building rather than
centered on an open wall will also minimize the effect of direct winds. Avoid alcoves and similar
areas that may increase wind loading of the vent termination.
• The gas venting system should be inspected prior to the heating season by a qualified technician.
This inspection should include removal of the cap to confirm an unrestricted vent.
Follow these steps outlined in the National Fuel Gas Code, NFPA 54/ANSI Z223.1 –latest edition to resize
the vent system to approach the minimum size using the appropriate tables in the Appendix of that code. The
National Fuel Gas Code may be obtained by writing to:
American Gas Association Laboratories
8501 East Pleasant Valley Road
Cleveland, OH 44131