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Quest
DRY
150 Installation, Operation and Maintenance Instructions
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Asset Protection and IAQ Solutions
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With the fan in the
“AUTO”
mode, the fan will operate only when needed by other functions of the system.
The fan will remain off unless the system is dehumidifying and/or ventilating. The fan always runs during
dehumidification and ventilation and the fan
“
O”
icon will be lit. To completely turn the system off, use the
“ON/OFF”
button as described earlier. To adjust the ventilation mode see Section 3.7.
5.3H Damper Operation and Setting (Ventilation) Manual/Hold Mode
Quest
DRY
150 units can be installed to incorporate optional ventilation. The damper setting controls
the ventilation function of the system. It has no control over the dehumidification function, although the
ventilation function can and should be used to dry the space depending on the climate and the outside air
conditions. Refer to the appropriate Quest
DRY
150 manual for more information.
In order to provide ventilation, the damper must be open (
“ON”
) and the fan must be running. The controller
takes care of these two functions automatically, so that whenever the damper is open (
“ON”
), the fan is
running.
The ventilation indicator
“O”
will be displayed whenever the unit is ventilating. The fan operation indicator
“O”
will also be lit.
There are three damper operation modes,
“OPEN – HOLD,”
“CLOSED – HOLD”
and
“PROGRAM”
(denoted by
“ON TIME” – “OFF TIME.”
Refer to section 3.8). With the damper in the
“OPEN – HOLD”
mode, the damper will be open and the fan of the system will be operating in order to introduce fresh air
into the space. Use this mode for continuous fresh air ventilation. The fan is always on when the damper is
open. When in
“CLOSED – HOLD”
mode, the damper will not open and the system will not ventilate.
When in the
“
PROGRAM”
mode, the control will operate the damper and fan (ventilate) according to the
programmed ventilation schedule (See Section 3.8).
To set the damper operation:
1. Press the
“VENT”
button. The current setting will
begin to flash on the display. Release the button.
2. Press the
“VENT”
button again to toggle between
“open,” “closed” and “program.”
3. Leave the control alone for 10 seconds to select
the indicated damper mode and return to
“
HOME”.
5.3I Intermittent or Programmed Ventilation
The system will operate the ventilation function according to the current ventilation program. The control
needs to be programmed to turn the ventilation function on and off at the desired intervals. This is done by
programming the ventilation timer.
There are two programs available for ventilation Monday
through Friday. There are also two programs for Saturday
and Sunday. No other choice of days is available.
Each program has:
• A
“START”
time of day when the ventilation schedule
begins.
• An
“OPEN FOR”
duration for the amount of time the
damper stays open in 5 minute intervals, from 0 to 60.
• A
“CLOSED FOR”
duration which closes the vent for
a specified time in 5 minute intervals from 0 to 60.
FOR HVAC INSTALLER AND HOMEOWNER
FOR INSTALLER AND HOMEOWNER
FOR HVAC INSTALLER AND OWNER
