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

WIRING ACCESS COVER
FIGURE 19: WIRING ACCESS COVER LOCATION
90-1884
WIRING
No additional wiring is needed unless:
• the dehumidier is ducted to the HVAC system
• a separate, external control such as a thermostat or
dehumidistat is to be used
• a oat switch, either integral to a condensate pump or
mounted to the condensate pan, is used
Use 18-22 AWG wire for any needed wiring. Access the
dehumidier wiring terminals by pulling off the wiring access
cover near the dehumidier control display (see FIGURE 19).
Snap the wiring access cover back into place after completing
all wiring.
WIRING TO THE HVAC SYSTEM
When the dehumidier is ducted to the HVAC system, it is
recommended that it also be wired to the HVAC system as
shown in FIGURE 20. If ducted to the HVAC system in a
return-to-return conguration, the dehumidier must be wired
to the HVAC system to prevent short-circuiting dehumidied
air directly back to the dehumidier inlet. In a return-to-
supply ducting conguration, running the HVAC fan with the
dehumidier ensures the warm dry air is mixed with room air
before being discharged to the home.
OPTIONAL W & Y WIRING
• Wire the W and/or Y terminal to the HVAC system when using
the ventilation feature of the dehumidier. See VENTILATION
on page 14.
• Wire the dehumidier Y terminal to the HVAC system to
disable the dehumidier compressor from operating when
the air conditioning is running. See ENABLING DEH W/AC on
page 17 for additional setup steps required to access this
feature.
+ - A B ODT VENT DEH
Sensor DampersRemote
FLOAT
Switch
DH DH
Gh Rf Cf Gs YW
HVAC EQUIP.
G
R
C
W
Y
R
C
G
W
Y
OPTIONAL
WIRES
EXISTING WIRE
NEW WIRE
THERMOSTAT
OR ZONE
CONTROL BOARD
HVAC
EQUIPMENT
FIGURE 20: WIRING TO HVAC SYSTEM
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