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Desert Aire - SP Manual
Figure 19 – VOC Monitoring Sensor
2.9 Auxiliary Heating Control Wiring
Note: You must use the Desert Aire control system to control the interlock with the room heating system.
This prevents wide fluctuations in room air temperature. It also prevents the heater from trying to heat the
room while the dehumidifier is running in cooling.
Desert Aire will provide a signal to operate the auxiliary pool room heating system. The signal can either
be a binary dry contact closure or a proportional voltage with an optional dry contact closure to operate an
interlock or pump. The heating output type is pre-set from the factory based on the request at the time
of order.
2.9.1 Auxiliary Heating – Dry Contact Closure
Desert Aire will provide a dry contact closure to interlock with the building heating system. This
contact closure is normally used to interlock with a gas or electric duct heater which has its own
power supply transformer. When the room air temperature drops below the set point, the dry contact
will close to energize the auxiliary heater. See the dehumidifier wiring diagram for details.
2.9.2 Auxiliary Heating – Proportional Signal
Desert Aire will provide a proportional signal to modulate a heating coil control valve on units
equipped with an integral heating coil.
This signal is reverse acting or direct acting depending on the settings in the controller. It is critical
that units with hot water and steam coils be set properly for freeze protection. See controller manual
for details on the settings and outputs.
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