Model 8910 Home Comfort Control ™ Or Third-Party Control; System Setup - Aprilaire 1750A Installation Instructions Manual

MODEl 8910 HOME COMfORT CONTROl
When used as an external control, the Model 8910 Home Comfort Control
the dehumidifier on and off when the relative humidity goes above or below the setting . The Model 8910 Home Comfort Control
Third-Party Control must be installed in the space that is being served by the dehumidifier. One example of this would be to install the
Model 8910 Home Comfort Control
to the HVAC system . The Model 8910 Home Comfort Control
on-board control knob setting . Refer to the Model 8910 Home Comfort Control
mounting, and operating instructions . The dehumidifier control knob can only be used to initiate Test Mode when a Model 8910 Home Comfort
Control or other third-party control is connected .
™
WIRING & DIP SWITCH CONfIGURATION
fIGURE 31 – Model 8910
Home Comfort Control
™
MODEL 8910
HOME COMFORT CONTROL
™
EQUIPMENT CONTROL
HVAC EQUIPMENT
MODULE
C
R
RC
RH
HC HP
W W
W2 W2
W3 B
Y Y
Y2 Y2
Y3 O
G G
L
C
EQ
HUM
DH nc
DH com
DH no
VENT
EAC
SEQUENCE Of OPERATION
• W hen the measured humidity is greater than the humidity setting on the Model 8910 Home Comfort Control
dehumidifier damper output turns on, the dehumidifier blower turns on, and the green Status LED on the dehumidifier flashes .
• T hree seconds after the dehumidifier blower turns on, the compressor turns on and the green Status LED switches to solid illumination.
• W hen the measured humidity falls below the setting on the Model 8910 Home Comfort Control
damper output turns off and the dehumidifier blower and compressor turn off along with the green Status LED .
in the home's living space and wire it to the dehumidifier which is located in the basement and is ducted
™
™
DEHUMIDIFIER
CONTROL BOARD
Wiring
R
C
G
W
Y
™
OR THIRD-PARTy CONTROl
or other third-party control acts like a dehumidistat and will turn
™
or other third-party control will override the dehumidifier control sensors and
or other third-party control Installation Instructions for location,
™
fIGURE 32 – Third-Party DIP Switch Configuration
HVAC FAN OFF
PRIMARY
VENT-AUTO
90-1538
Wiring Notes:
• D EH output(s) on control must be normally open.
IMPORTANT: The dehumidifier Rf and Cf terminals must be
powered from the transformer that powers the Model 8910 Home
Comfort Control
Third-Party Control with 2 Dehumidifier Connections
1 . Connect one thermostat dehumidifier terminal to the Rf terminal on
the dehumidifier control board .
2 . Connect the other thermostat dehumidifier terminal to the DH
terminal on the dehumidifier control board .
Third-Party Control with 1 Dehumidifier Connection
Connect the thermostat dehumidifier terminal to the DH terminal on
the dehumidifier control board .
90-1537

SYSTEM SETUP

LOCAL EXTERNAL
HVAC FAN ON
PRIMARY/SECONDARY
VENT-TIMED
or third-party control .
™
or other Third-Party Control, the
™
or other Third-Party Control, the dehumidifier
™
or other
™
21