Desert Aire SelectAire Plus SP Series, Installation And Operation Manual

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Desert Aire - SP Manual
Factory Installed Return Air Temperature / Humidity Sensor
If selected at the time of order, the sensor is already factory installed in the return air section
downstream of the filter rack. When the controller is powered you will be able to immediately read
the return air condition.
It should be noted that airflow must be present at all times to accurately read the zone condition
with this configuration; therefore, fan cycling control is not to be used with this sensor option. Most
commercial facilities require constant fan operation regardless of the occupancy.
Wall Mounted Return Air Temperature / Humidity Sensor
If your dehumidifier was ordered with a field-installed wall-mount humidity and temperature sensor,
mount the sensor about five feet above the pool deck on an interior wall with natural air circulation.
Avoid the following locations:
• Hot spots near concealed heating pipes, warm air ducts, supply register outlets, or solar
radiation.
• Cold spots due to a cold wall or drafts from stairwells, doors, windows, or supply register
outlets.
• Dead spots such as behind doors or in corners where room air cannot circulate freely.
A supply air temperature sensor and duct holder is also provided to be installed downstream of any
field provided heaters. Mount this in the supply duct and seal the penetration. Install at least 5 ft.
downstream of all heaters and not in the “line of sight” of the heater elements as the radiant
heat produced by the heater may affect the reading.
Outdoor Air Temperature / Humidity Sensor
The outdoor air temperature and humidity sensor is used to determine if the conditions of the
outdoor air are suitable for utilizing the economizer function. This sensor and a connector are
included inside the unit in the electrical compartment of the unit. A radiation shield is shipped
separately from the unit.
It should be noted that the return sensors and the outdoor air sensors are digitally communicating
devices that are physically the same, but are programmed with unique addresses. The outdoor air
sensor will have a label indicating “ADDR 191”.