quest
Asset Protection and IAQ Solutions
quest
1-800-533-7533
Quest
DRY
150 Installation, Operation and Maintenance Instructions
www.thermastor.com
5.3F Operation
The initial dead band setting (the range that the dehumidifier cycles
on and off) is 3%. With a setpoint of 50%, the dehumidifier turns
on when the reading reaches 53%. The dehumidifier continues
to remove water from the air until the reading is 47%. The
dehumidifier remains off until the reading is 53%.
If the setpoint is equal to or greater than the current ambient
condition, the space does not need to be dried so the dehumidifier
function will be off.
Example: Setpoint: 50% RH
Current condition: 45% RH = Dehumidifier off, the
“
O”
indicator
will not be shown.
If the setpoint is less than the ambient condition, the dehumidifier will be on and the red
“DEHU”
indicator
will be lit. Since the space is more humid than the set point, the controller operates the dehumidifier to dry
the space.
Example: Setpoint: 50% RH
Current condition: 55% RH = Dehumidifier on, the
“
O”
indicator will be shown.
To set the relative humidity setpoint, press up or down
“RH”
buttons to adjust the relative humidity setpoint
as desired. Therma-Stor recommends relative humidity levels not exceed 50% in the summer, and 25-35% in
the winter if you live in a cold climate. It is not recommended that the humidity setpoint be set below 35%.
In order to dry the structure in the winter in a cold climate, use the ventilation function of the system rather
than the dehumidifier function. Call the factory or refer to the owner’s manual for more information.
5.3G Fan Setting and Operation
Use the
“FAN”
button to adjust the fan operation. There are
2 choices for fan operation:
“ON”
or
“AUTO.”
“ON”
– indicates the fan of the Quest
DRY
150 will run
continuously. This does not affect either the dehumidification or
ventilation functions of the system. In other words, the system
may or may not be ventilating or dehumidifying while the fan is
running. Common reasons for operating the fan continuously are
filtration and air recirculation.
“AUTO”
– indicates the fan will run when the control calls for
dehumidification or ventilation. If the control has not called for
dehumidification for 3 hours, the control will automatically run the fan for 10 minutes. The fan must run a
specific amount of time per day. This helps to keep the dehumidifier dry.
After dehumidification cycle, fan automatically shuts off for 10 minutes.
To set the operation:
1. Press and hold the
“FAN”
button. The current fan setting will begin to flash. Release the button.
2. Press the
“FAN”
button to toggle between the
“ON”
and
“AUTO”
modes.
An
“
O”
indicator indicates the fan is operating. A flashing
“
O”
indicator indicates the fan is in a wait mode
and will operate shortly. No
“
O”
indicates the fan is off.
FOR HVAC INSTALLER AND HOMEOWNER
FOR INSTALLER AND HOMEOWNER
FOR HVAC INSTALLER AND OWNER
