quest
Asset Protection and IAQ Solutions
quest
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Quest
DRY
150 Installation, Operation and Maintenance Instructions
www.thermastor.com
WARNING: TO AVOID TRANSFORMER DAMAGE
ONLY CONNECT THE WHITE WIRE TO THE
CONTROL IF A DAMPER IS USED.
The white wire controls the optional motorized
damper that can be installed into a fresh air duct.
This provides the ability to control when fresh air is
introduced into the building by using the ventilation
timer function labeled “DMP” on the control (See
Section 3.7).
IF THE MOTORIZED DAMPER IS
NOT USED, DO NOT CONNECT THE WHITE
WIRE TO THE CONTROL OR DAMAGE TO THE
TRANSFORMER MAY RESULT.
Simply leave the
(DMP) terminal unused if the damper is not used,
and cap off the white lead from the Quest
DRY
150
dehumidifier.
5.2C Auxiliary relay operation
At times it may be desirable to coordinate fan operation of the central heating/cooling system with
dehumidifier operation. The DEH 3000 features a relay that provides this ability. The relay terminals labeled
NC, COM and NO operate according to the following chart:
Dehumidification
Operation
COM/NO
COM/NC
ON
CLOSED
OPEN
OFF
OPEN
CLOSED
Common uses (assuming standard thermostat wiring
color schemes as noted):
Disengage A/C during dehumidification
Redirect the yellow thermostat wire to the NC
terminal. Wire the yellow wire from the A/C to the
COM terminal.
Engage the A/C central fan during dehumidification
1. Disconnect the green wire that runs to the fan
relay from the screw on the thermostat.
2. Connect the green wire that runs to the fan relay to the COM screw on the DEH3000 board.
3. Run a wire from the red wire screw on the thermostat to the NO (Normally Open) screw on the DEH3000
board.
4. Run a wire from the green wire screw on the thermostat to the NC (Normally Closed) screw on the
DEH3000 board.
The central fan should run when the Thermostat fan switch is turned to ON and when the dehumidifier is
operating.
FOR INSTALLER AND HOMEOWNER
FOR HVAC INSTALLER AND OWNER
