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Quest 150 Dual
Installation, Operation and Maintenance Instructions
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5. Ducting
5.1 Duct Kit
Factory designed duct kits can be purchased to accept 10” ducting to all outlets of the Quest 150 Dual. Contact your
dealer or order online.
6. Operation
6.1 Humidity Control Adjustment
The humidity control is an adjustable switch that closes when the relative humidity of the air in which it is located rises to
the dial set point. It opens when the RH drops 4 to 6% below the set point.
Approximate Humidity Levels Per Setting:
“Drier”
20% to 30% Relative Humidity
“Normal”
45% to 55% Relative Humidity
(Recommended)
“Humid”
80% to 90% Relative Humidity
The dehumidifier will run until the relative humidity (RH) is reduced to the humidity control dial setting.
Quality humidity meters are available from the factory and are recommended to accurately monitor humidity levels.
Refer to the options and accessories table in this document.
6.2 Fan Switch
Turning the impeller switch to
“FAN ON” will cause the unit’s internal impeller to run continuously, whether the unit is
dehumidifying or not. This function is desirable if the unit is used for air circulation.
Turning the fan switch to
“FAN AUTO” will cause the unit’s internal blower to run only while the unit is dehumidifying.
7. Maintenance
CAUTION! NOTE: Do not operate the unit without the filter or with a less effective filter. The
heat exchange coils inside the unit could become clogged and require disassembly to clean.
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