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Ultra Aire XT105H / XT155H / XT205H Installation Instructions
Ultra-Aire.com | (800) 533-7533
CONTROLS
A control must be used with the Ultra Aire Dehumidifier. 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 seperately and can be purchased online or through your local dealer. Other
thermostats are compatible with the Ultra Aire Dehumidifier.
CAUTION!
DO NOT ALLOW THE 24V TERMINAL FROM THE ULTRA AIRE DEHUMIDIFIER TO CONTACT THE COM
TERMINAL ON THE ULTRA AIRE DEHUMIDIFIER OR DAMAGE TO THE TRANSFORMER WILL RESULT.
Wiring Controls
Circuit Breaker
To prevent damage to the 24 volt control transformer, the Ultra Aire Dehumidifier 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 Dehumidifier before making any control
connections. The reset button for the circuit breaker can be found on the back
of the unit.
Control Connections
The control and the Ultra Aire Dehumidifier are labeled to prevent confusion. Depending
on the control, some of the screw terminals on the Ultra Aire Dehumidifier may not be
used. Be sure to consult the electrical schematic in this manual or inside the access panel
of the Ultra Aire Dehumidifier before making control connections.
FRONT VIEW
20 1/4”
21 3/4”
21 3/4”
41 1/2”
37 3/4”
21 3/4”
21 3/4”
BACK VIEW
20 1/4”
SIDE VIEW
Rear View
Circuit Breaker
Reset Button
A low voltage control must be used with the Ultra Aire Dehumidifier.
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 Dehumidifier and the external control.