Desert Aire SA Series, Installation And Operation Manual

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3.4 General Testing
After you balance the airflow and test the refrigeration circuits, verify that the other
equipment and accessories connected to the dehumidifier work properly. Although this
may be difficult, since the dehumidifier is usually interlocked with a variety of equipment
installed by different contractors, you must not skip this step.
Each of these devices (which may include auxiliary air and water heaters, smoke alarms,
circulating pumps, and a building management system) is vital in maintaining the
performance and comfort of the swimming pool environment. Many customer complaints
are caused by improper interlocks between these devices. Make sure you check the
following:
• Check the outdoor air and exhaust devices. The outdoor air and exhaust
dampers must open when they receive an “occupied” signal from the
dehumidifier. If you have installed an exhaust blower, make sure that it is
interlocked with the “occupied” signal or with an end switch on the outdoor air
damper actuator.
• Check the condensate drain to make sure it has been trapped and primed with
water. Verify that it drains freely, with no leaks. If the drain is outside or in an
unconditioned space, make sure it has been heat traced. If you installed a
condensate pump, make sure it operates properly.
• Check the pool water piping to the dehumidifier (on units equipped with optional
pool water heating). Make sure that all air has been bled out of the lines, and
check that an air bleed valve has been installed at any high points in the water
lines. If the circulating pump is not set for continuous operation, make sure it is
properly interlocked with the dehumidifier. Temporarily shut off the water flow to
the unit to verify that the factory-installed water flow proving switch operates
correctly. Verify that the pool water temperature sensor has been installed where
water will flow over it continuously. Verify that the pool water temperature sensor
is on the water inlet of the unit.
• Check the operation of the remote condenser (on units equipped with this
option). Make sure that the pressure transducers are wired to the condenser fan
cycling control, the cut-in and cut-out pressures are correctly set per the remote
condenser installation manual. Verify that the fans are blowing vertically upward
when they run.
• Check the temperature and humidity readings displayed on the controller. If you
think the values are incorrect, check the sensor or its field-installed wiring for
damage. If necessary, check the voltage jumper on the temperature and
humidity sensor. It must be set in the “0-10 VDC” position.
3.5 Routine Maintenance Schedule
3.5.1 Service Every Month
• Check and replace the air filters in the return duct and the outdoor air duct.
• Check for dirty coils in the dehumidifier. Clean them if necessary.
Desert Aire - SA Manual