Desert Aire LW, Installation And Operation Manual

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Desert Aire - LW Manual
Figure 3 - Typical Ice Rink Installation
2.2 Duct Installation
Duct design and installations should conform to the latest ASHRAE and SMACNA low
velocity duct standards (see section 5.2 for details). Undersized, restrictive ductwork with
abrupt turns or transition can decrease the efficiency and the moisture removal capacity of
your dehumidifier. Size the ductwork for an acceptable air pressure drop at the airflow
volume of your dehumidifier. Use neoprene flex connectors when you attach ductwork to the
dehumidifier to prevent transmission of excess vibration and noise.
Figure 4 - Standard Unit Airflow Specifications
Install the return air grilles or openings as high as possible in the room. In most cases one
centrally-located return air grille will be adequate. To prevent air short-cycling, do not install
the return air grille too close to a supply grille. Grille sizing is also important.
Select the grilles, registers and diffusers for low static pressure loss, required throw distance
and the specified CFM rating. You can find this information in most grille manufacturers’
catalogs. If you are installing the grilles in a corrosive environment, such as an indoor
03
05
08
10 / 12 / 15
1700
2750
4300
6900
External Static Pressure
(Resistance of Ductwork
and Grilles)
0.0” - 1.0” W.C.
0.0” - 1.0” W.C.
0.0” - 1.0” W.C.
0.0” - 1.0” W.C.
LW Model Size Airflow Rate
(CFM)