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QUEST 100
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
QUESTCLIMATE.COM
(877) 420-1330
7.7 REMOTE CONTROLS
The Quest 100 Dehumidifier is controlled by devices mounted on a panel that is remote from the unit. You may
or may not have the devices listed below depending on the model of the remote hygrostat you purchased. If
the Quest 100 Dehumidifier fails to operate as desired, always check the settings of the controls to ensure that
they are correct. Check that the controls are receiving 24VAC from the Quest 100 Dehumidifier. Check the
connections between the Quest 100 Dehumidifier, the hygrostat, and the field control wiring.
7.7A HUMIDITY CONTROL
The humidity control is an adjustable switch that closes when the relative humidity of the air in which it
is located rises to the set point. It opens when the RH drops 4 to 6% below the set point. If the Quest 100
Dehumidifier does not run, try turning the humidity control Down using arrow on control pad. If it then runs, the
humidity control is out of calibration or the RH is below setpoint.
7.8 DEFROST SYSTEM
The Quest 100 Dehumidifier is equipped with an automatic defrost mechanism. If the Quest 100 Dehumidifier
operates in conditions that develop frost on the evaporator, it will sense the frost build-up and automatically
defrost the evaporator. The Quest 100 Dehumidifier may not appear to be operating correctly during the defrost
sequence, but once the defrost sequence is completed, the Quest 100 Dehumidifier will resume dehumidifying.
The evaporator temperature sensor is installed into the center of the evaporator coil. It will automatically
shut the compressor off if the temperature drops due to excessive frost formation on the evaporator coil. The
impeller fan will continue to run, causing air to flow through the evaporator coil and melt the ice. When the ice
has melted, the evaporator temperature will rise, and the control will restart the compressor.
7.9 CONDENSATE PUMP KIT
An optional condensate pump kit is available from the factory for use with the Quest 100 Dehumidifier.
Condensate is automatically pumped to a remote location when the water level in the pump’s reservoir rises to
close the float switch.
The pump also contains a safety float switch. The white leads from this switch extend from beneath the
pump cover. These leads should be extended to the FLOAT terminals on the terminal block and the factory
float jumper removed. If the pump fails, the safety switch opens causing the compressor to stop and water
production to cease before the reservoir overflows. E4 will be displayed on the control panel. The Quest 100
Dehumidifier will not dehumidify until this switch closes.
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