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drops below the setpoint, the dry contact will close to energize the auxiliary heater.
See the dehumidifier wiring diagram for details.
2.8.2 Auxiliary Heating – Proportional Signal
Desert Aire provides 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 or steam coils be set properly for freeze protection.
See controller manual for details on the settings and outputs.
Most proportional valves have either three or four terminals for field-installed wiring.
•
Four-terminal valves have two terminals for 24 VAC power and two terminals
for the signal input.
•
Three-terminal valves have one terminal for the “hot” 24 VAC input, a second
terminal for the “positive” signal input, and a third, common terminal for the
“neutral” 24 VAC input and the “negative” signal input.
You must follow the instructions included from the valve manufacturer. Observe the
proper polarity, or you may damage both the valve and the Desert Aire controller. See
the unit wiring schematic for information on signal wire connection points.
2.9
Smoke Alarm Interlock
Desert Aire LC/LV dehumidifiers are equipped with a set of terminal blocks for interlocking with a
smoke alarm (alarm provided and installed by others). The contacts must break when smoke is
present. This will shut off the blower and compressors. See the dehumidification
wiring diagram for connection details.
Desert Aire - LC/LV Manual
Summary of Contents for ExpertAire LC Series
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