DUCT CONNECTION (Dependent Operation)
In this arrangement, the dehumidifier is connected
either upstream or downstream of the air
conditioner air handler. Both the discharge and
the return of the dehumidifier are connected to
the same side of the air handler. When the
dehumidifier is connected for dependent
operation, the central air conditioner fan and the
dehumidifier fan MUST operate simultaneously.
CONTROLS CONNECTION
(Dependent Operation)—Illustration on page 8
The dehumidifier controls must interface with the
main air conditioning unit. This interface is
required to do the following:
•
Ensure that the air handler/furnace fan is on
when the dehumidifier is operating
Two wires run from the air conditioner to the
dehumidifier to accomplish this interface, per Unit
DAMPER CONNECTION
If an optional damper(s) is used in the discharge/
return duct, this may be controlled by the
dehumidifier. See Unit Connection Diagram
(Independent Operation) for connection details.
When connected as shown in the Unit Connection
Diagram, the dehumidifier provides only the
switching interface for the damper(s). Power for
these devices must be provided with a separate
transformer, not from the transformer located in
the dehumidifier.
The damper control wiring must meet national
and local electrical codes. Entry into the
dehumidifier unit is through the control wire entry
located on the air-entering end of the unit. Note
that this is separate from the power entry.
DEPENDENT OPERATION
• Dehumidifier installed on floor
• Piped return/return
• Dependent operation (furnace blower and
dehumidifier must operate at the same time)
Dehumidifier Connected for Dependent Operation
with Vertical Air Handler/Furnace
Connection Diagram (Dependent Operation) and
per the following:
•
Connect the D terminals on the dehumidifier
unit to the R terminal on the air handler/
furnace. Do not disconnect any of the existing
wires from the air conditioning unit.
•
Connect the DH terminal on the dehumidifier
to the G terminal on the air handler/furnace.
Do not disconnect any of the existing wires
from the air conditioning unit.
All controls wiring, including connection to a
remote dehumidistat, must be 18-22 gauge and
must meet national and local electrical codes.
Entry into the dehumidifier unit is through a 7/8"
diameter hole located on the air entry end of the
unit, adjacent to the unit mounted dehumidistat.
Note that this is separate from the power entry.
DAMPER CONNECTION (Dependent
Operation)
Although not necessary, if an optional damper(s)
is utilized in the discharge/return duct, this may be
controlled by the dehumidifier. See Unit
Connection Diagram (Dependent Operation) for
connection details. When connected as shown in
the Unit Connection Diagram, the dehumidifier
provides the switching interface for the damper(s)
as well as the line voltage power to the
transformer (by others). Power for the damper(s)
is provided by the dehumidifier.
The damper control wiring must meet national
and local electrical codes. Entry into the
dehumidifier unit is through the control wire entry
located on the air-entering end of the unit. Note
that this is separate from the power entry.
See Illustration on page 8
7
DEHUMIDIFIER
