Desert Aire SelectAire Plus SP Series, Installation And Operation Manual

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Desert Aire - SP Manual
In pool applications, it is critical to maintain negative space pressurization relative to adjacent spaces
and the outside ambient. This prevents moisture laden air from being driven into the wall cavities and
condensing. The SelectAire Plus™ unit includes provisions to measure the differential in static pressure
between the space and the outdoors and help to maintain this negative static pressure in the space.
The Desert Aire SP unit contains operational controls that assist in maintaining the
poolroom envelope at a negative static pressure. Proper setup allows these
controls to operate as intended; however, these are not safety controls. It is the
responsibility of the owner/operator to ensure that proper space pressurization of
the envelope occurs. It is recommended that the pressurization be checked on a
regular basis to ensure proper operation of all building systems and any issues
corrected immediately.
Figure 37 – Dehumidifier Side View Showing Direction of Airflow
Supply Airflow Setup
1. Check the condition of the air filters. They should be relatively clean during the setup
procedure. The airflows have been set at the factory based on the information provided
at the time of order. Check the programmed values against the latest schedule
documents.
2. With the unit supply fan and exhaust fan disabled, check the supply airflow reading and
space static pressure readings on the controller display. The room zone static pressure
reading should be indicated as 0.00 +/- 0.02. If out of tolerance, a small offset can be
placed in the control under SERVICE MENU SENSOR OFFSETS SCREEN. Also note
that the wind direction and nearby objects can have an impact on the outdoor pressure
reading. Review the installation guides for proper positioning. Review the tubing running
to each location for kinks or obstructions. Review adjacent spaces for impact on
poolroom pressure. The exhaust airflow should read 0 CFM +/- 100 CFM. If flow rate
shows greater than this, check the exhaust fan pressure transducer and provide an
offset as required.