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READ AND SAVE THESE INSTRUCTIONS
The Model 75 is for use with any dehumidifier requiring a normally
open control, including Aprilaire Models 1710A, 1730A, 1750A, 1770A.
SAfETy INSTRUCTIONS
1. Improper installation may cause property damage or injury. Installation, service,
and maintenance must be performed by a qualified service technician.
2. 120 Volts may cause serious injury from electric shock. Disconnect electrical
power before starting installation or servicing. Leave power disconnected until
Installation/service is completed. This control is not a 120 Volt (line voltage)
device.
1. Read all instructions before beginning installation.
2. Do not use in pool applications. Pool chemicals can damage the control.
3. Do not use solvents or cleaners on or near the display and circuit board.
Chemicals can damage components.
Model 75 Dehumidifier Control
Installation Instructions
WARNING
CAUTION
1
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Summary of Contents for Aprilaire 75
- Page 1 Model 75 Dehumidifier Control Installation Instructions READ AND SAVE THESE INSTRUCTIONS The Model 75 is for use with any dehumidifier requiring a normally open control, including Aprilaire Models 1710A, 1730A, 1750A, 1770A. SAfETy INSTRUCTIONS WARNING 1. Improper installation may cause property damage or injury. Installation, service, and maintenance must be performed by a qualified service technician.
- Page 2 . The control allows the homeowner to set and adjust the humidity setting and turn dehumidification on or off from a convenient location . The Model 75 uses an onboard sensor to monitor the relative humidity in the space in which it is located and displays the measured relative humidity on the digital display .
- Page 3 5 . Remove dehumidistat leads . ANCHOR 6 . The existing 2-wire cable can remain . The Model 75 wiring requires 4 wires . Install more wires as needed . 7 . Mount the Model 75 control following steps 1-5 in the MOUNT CONTROl section above .
- Page 4 7-13 . 6. I nstall the insulated cover plate (Service Part 4927) and gasket over the opening, using the 3 . Connect the wires from the C and R terminals on the Model 75 to the HVAC or thermostat screws removed in step 3 . See figure 5 .
- Page 5 3 . Turn on/off switch on dehumidifier ON . After a 4 second start up sequence all buttons on the Model 75 will be functional . 5 . Connect the wires from the C and R terminals on the Model 75 to the HVAC or thermostat C and R terminals .
- Page 6 TEST MODE TURNING ON AND SETTING CONTROl 1 . Press and hold the ON button for 5 seconds to enter Test Mode . 1 . Press the ON button . a. V erify all LCD segments blink every second. 2 . Use the buttons to set the control at 59% . b .
- Page 7 Relocate the control . sunlight, above a heat or humidity source, or in the path of a supply register . P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 www.aprilairepartners.com 10009383 4 .11 Printed in U .S .A . B2205372A © 2011 Aprilaire – A division of Research Products Corporation...
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