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Ultra-Aire 120V Installation Instructions
CONTROLS
A control must be used with the Ultra-Aire 120V. Ultra-Aire offers the DEH 3000 proprietary control. The DEH 3000
allows homeowners to monitor and control relative humidity and proper ventilation levels in their home. This control is
also available with a remote sensing option.
Note: The DEH 3000 is sold separately and can be purchased online or through your local dealer. Other
thermostats are compatible with the Ultra-Aire 120V.
CAUTION!
DO NOT ALLOW THE 24V TERMINAL FROM THE ULTRA-AIRE 120V TO CONTACT THE COM TERMINAL
ON THE ULTRA-AIRE 120V OR DAMAGE TO THE TRANSFORMER WILL RESULT.
Wiring Controls
Circuit Breaker
To prevent damage to the 24 volt control transformer, the Ultra-Aire 120V comes
with a resettable circuit breaker. Check wiring for any electrical short and repair
before resetting breaker. Resetting the circuit breaker without correcting the
electrical short may result in transformer damage. Be sure to check the electrical
schematic in this manual or inside the access panel of the Ultra-Aire 120V before
making any control connections. The reset button for the circuit breaker can be
found on the side of the unit.
Control Connections
The control and the Ultra-Aire 120V are labeled to prevent confusion. Depending
on the control, some of the screw terminals on the Ultra-Aire 120V may not be
used. Be sure to consult the electrical schematic in this manual or inside the
access panel of the Ultra-Aire 120V before making control connections.
Side View
Circuit Breaker
Reset Button
A low voltage control must be used with the Ultra-Aire 120V.
COM
24VAC Power Transformer Neutral Side
FAN
Fan Control
24V
Transformer High Side
DEHU
Dehumidification (Fan and Compressor) Control
FLOAT
External low voltage float switch or water sensor (two terminals).
Use normally closed switch.
Terminal Block Control Operation:
Compressor ON / Fan ON
Make contact between 24V and DEHU terminals
Compressor OFF / Fan ON Make contact between 24V and FAN terminals
Power HVAC Accessory
Connect the accessory to the COM and 24V terminals
Between the COM lead and the 24V TERMINAL is a 40VA transformer. This low voltage power source
powers the relay coils which control the fan and compressors. This 24VAC transformer can also be
used to power HVAC accessories external to the dehumidifier.
NOTE: 18 gauge wire needed between the Ultra-Aire 120V dehumidifier and the external control.