Model 70 Living Space Control - Aprilaire 1750A Installation Instructions Manual

MODEl 70 lIVING SPACE CONTROl

The Model 70 Living Space Control contains its own sensors that override the main control sensors on the dehumidifier. The purpose of utilizing
the Model 70 is to have the dehumidifier control located in a living area, where the homeowner can monitor and control humidity levels . Once
connected and powered, the Model 70 is automatically recognized by the dehumidifier and will continuously communicate the air conditions
and the dew point setting to the dehumidifier control . No sampling is needed when using a Model 70 because the control is located in the
space to be conditioned and is measuring the dew point in that space . Refer to the Model 70 Installation Instructions for location and mounting
instructions . The Convertible configuration is not available with the Model 70 Living Space Control .
WIRING & DIP SWITCH CONfIGURATION
fIGURE 25 – Model 70 Wiring
MODEL 70
A
B
+
-
90-1537
SEQUENCE Of OPERATION
Whole-Home
• T here is a 6 minute delay upon power up or after cycling power.
• I f the dew point of the air is above the dew point setting on the Model 70, the dehumidifier damper output turns on, the dehumidifier blower
turns on, and the green Status LED 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 dew point falls below the dew point setting on the Model 70, the dehumidifier damper output turns off and the dehumidifier
compressor and blower turn off along with the green Status LED .
16
DEHUMIDIFIER
CONTROL BOARD
fIGURE 26 – Model 70 DIP Switch Configuration
SYSTEM SETUP
LOCAL
HVAC FAN OFF
WHL HOUSE
VENT-AUTO
90-1538
EXTERNAL
HVAC FAN ON
CONVERTIBLE
VENT-TIMED