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Quest DRY 180 Installation, Operation and Maintenance Instructions
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Approximate Humidity Levels Per Setting
“Drier”
35% to 45% Relative Humidity
“Normal” 45% to 55% Relative Humidity
(Recommended for most applications)
“Humid” 55% to 65% Relative Humidity
The dehumidifier will run continuously until the relative humidity (RH) is reduced to the humidity control
dial setting. There is no benefit to setting the humidity control to “dry” in rooms under 65°; doing so will
result in long periods of ineffective dehumidifier run time.
Quality humidity meters are available from your dealer are recommended to accurately monitor humidity
levels.
Once the dial has been set to the desired level of humidity control, the Quest Dry 180 will maintain the same
percentage of relative humidity regardless of room temperature.
To turn the unit off, position the humidity dial to the far left and set fan control to “auto.”
6.2 Defrost Cycle
An automatic defrost thermostat is attached to the refrigerant tubes inside the unit. It will automatically shut
the compressor off if excessive frost forms on the evaporator coil. The blower 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 thermostat will automatically restart the compressor. During this process, cool air may be
coming out of the unit.
6.3 Blower (Fan) Switch
Turning the fan switch “FAN ON” will cause the unit’s internal blower to run continuously, whether the unit
is dehumidifying or not. This function is desirable if the unit is used for air circulation or filtration. Turning the
fan switch to “FAN AUTO” will cause the unit’s internal blower to run only while the unit is dehumidifying.
7. Maintenance
NOTE: Do not operate the unit without the proper filter or with a less effective filter. The
heat exchange coils inside the unit could become clogged, resulting in a loss of effective-
ness and/or efficiency and may require disassembly to clean.
7.1 Air Filter
The Quest Dry 180 ships with a standard MERV-11 65% 1” pleated fabric filter and a 1/4” aluminum framed
pre-filter installed. Operating the unit with a dirty or obstructed filter will reduce dehumidifier capacity and
efficiency and may cause the compressor to cycle on and off unnecessarily.
CAUTION!
