33
•
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.
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 the
American Gas Association Laboratories, 8501 East Pleasant Valley Road, Cleveland, OH
44131 or the National Fire Protection Association, Batterymarch Park, Quincy, PA 02269.
Refer to the documents located in the heater module for more detail instructions on
installation on your specific terminal unit.
2.11 Electric Heater (Optional)
For Aura™ Products
In order to keep the controls of the electrical heater cool, there are two openings in the panel
adjacent to the heater. The hoods for rain protection of these openings are shipped with the
unit, and the mounting hardware is already in place. Mount the hoods over the heater cooling
openings using this hardware.
2.12 Auxiliary Heat Coil Piping (Optional)
The Desert Aire dehumidifier may be equipped with an optional hot water or steam air heating
coil. This coil, when properly sized, will provide space heating during the winter months. Use
proper practice when designing and installing the coil piping to prevent poor coil performance,
shortened service life, or damage to the coil.
• The supply connections must not be supported by the coil headers.
• The control valve should be sized according to the pressure and flow rate requirements not
by the coil connection size.
• On steam systems, use strainer, dirt pockets, and isolation valves to prevent clogging the
control valve and to simplify service.
• Install swing joints in the connection piping to prevent damage to the coil header from
thermal expansion.
• Use a backup wrench on the pipe stubs when attaching connections to prevent damage to
the header.
Desert Aire - QS/QV Manual
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