Aprilaire E100 - Wiring to External or Remote Controls; Wiring to a Float Switch

WIRING TO EXTERNAL OR REMOTE CONTROLS
The dehumidier can be wired to an external control that
senses the humidity in the living space, such as an AprilAire
Thermostat or the Model 76 Dehumidier Control. This is most
often done when the dehumidier is ducted to the HVAC
system and is located in a hard-to-reach location such as an
attic or basement.
The Model 76, when used as a remote control, allows the user
to see the humidity sensed by the dehumidier and adjust the
dehumidier setting from a remote location. This is most often
used when the dehumidier is not ducted to the HVAC system
and serves a hard-to-reach location such as a crawl space or
basement.
If using an external control, wire to the DH terminals of the
dehumidier (see FIGURE 21). Most external controls use a
normally open switch that closes with a dehumidication
demand, in which case leave the NC/NO switch in the NO
position. For controls that use a normally closed switch, put the
NC/NO switch in the NC position. If using the AprilAire Model 76
as a remote control, wire to the (+ - A B) terminals. Refer to the
installation instructions for the control being used for wiring
details.
+ - A B ODT VENT DEH
Sensor DampersRemote
NC NO
FLOAT
Switch
DH DH
Gh Rf Cf Gs YW
HVAC EQUIP.
A
B
NORMALLY CLOSED
FLOAT SWITCH
FLOAT
Switch
DH DH
FIGURE 21: WIRING TO AN EXTERNAL OR REMOTE CONTROL
FIGURE 22: FLOAT SWITCH WIRING
90-2694
90-1857
A. USE FOR EXTERNAL CONTROL APPLICATIONS
B. USE FOR REMOTE CONTROL APPLICATIONS
WIRING TO A FLOAT SWITCH
Use only if the installation includes a oat switch or a
condensate pump. The dehumidier leaves the factory with a
jumper wire installed in the oat switch terminals. Remove the
jumper and wire the oat switch terminals to the oat switch or
condensate pump overow switch as shown in FIGURE 22.
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