Aprilaire 8840 Safety & Installation Instructions
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Aprilaire 8840 Safety & Installation Instructions

Touch screen wi-fi automation thermostat with integrated indoor air quality solutions
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See also: Owner's Manual
READ AND SAVE THESE INSTRUCTIONS
Safety &
Installation
Instructions

TABLE OF CONTENTS

Thermostat mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Equipment control module mounting . . . . . . . . . . . . . . 3
Thermostat wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Remote temperature sensor (optional) . . . . . . . . . . . . . 4
Support module wiring (optional) . . . . . . . . . . . . . . . . . 4
Equipment control module wiring . . . . . . . . . . . . . . . . . 5
Outdoor temperature sensor (included) . . . . . . . . . . . . . 6
and humidity sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Conventional heat/cool two transformer . . . . . . . . . . . 8
Heat pump single transformer . . . . . . . . . . . . . . . . . . . . 9
Heat pump two transformer . . . . . . . . . . . . . . . . . . . . . 9
Model 8840 Touch Screen
Wi-Fi Automation Thermostat
with Integrated Indoor
Air Quality Solutions
Power and reset options . . . . . . . . . . . . . . . . . . . . . . . 11
Installer setup wizard . . . . . . . . . . . . . . . . . . . . . . . . . 11
General system settings table . . . . . . . . . . . . . . . . . 11
Thermostat system settings table . . . . . . . . . . . 12-13
Humidifier system settings table . . . . . . . . . . . . . 14-15
Dehumidifier system settings table . . . . . . . . . . . . . 15
Air cleaning system settings table . . . . . . . . . . . . . . 16
Fresh air system settings table . . . . . . . . . . . . . 16-17
Installer system test . . . . . . . . . . . . . . . . . . . . . . . . . . 17
WiFi setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
REFERENCES
Quick reference to controls & display . . . . . . . . . . 19-20
Thermostat features . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

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Summary of Contents for Aprilaire 8840

  • Page 1: Table Of Contents

    Model 8840 Touch Screen Wi-Fi Automation Thermostat with Integrated Indoor Air Quality Solutions READ AND SAVE THESE INSTRUCTIONS Safety & Installation Instructions TABLE OF CONTENTS INSTALLATION INDOOR AIR QUALITY WIRING DIAGRAMS Thermostat installation location recommendations . . . 2 Indoor Air Quality wiring with separate transformers .

  • Page 2: Installation

    INSTALLATION INSTALLATION THERMOSTAT INSTALLATION LOCATION RECOMMENDATIONS EQUIPMENT CONTROL MODULE MOUNTING Thermostat should be mounted: Do not mount thermostat: The equipment control module has the following features to simplify mounting and wiring and provide for a clean and neat installation . •...

  • Page 3: Remote Temperature Sensor (Optional)

    INSTALLATION INSTALLATION REMOTE TEMPERATURE SENSOR (OPTIONAL) EQUIPMENT CONTROL MODULE WIRING A remote temperature sensor can be used for control if the thermostat is to be mounted in a concealed location or a remote sensor can be averaged with the thermostat sensor to control a large space . An 8051 flush mount or 8053 surface mount remote temperature sensor can be attached to the T1 and T2 terminals and mounted in a recommended area .

  • Page 4: Outdoor Temperature Sensor (Included)

    Do not mount the sensor in direct line-of-sight of the heat exchanger, cooling coils, or UV lights as this may cause the sensor to report false temperature readings . 1 . Locate the Aprilaire Model 8052 sensor in the supply trunk, after the heat exchanger and cooling coils . (See shaded areas in figure below .) 2 .

  • Page 5: Hvac Wiring Diagrams

    HVAC WIRING DIAGRAMS HVAC WIRING DIAGRAMS CONVENTIONAL HEAT/COOL SINGLE TRANSFORMER (USE JUMPER) HEAT PUMP SINGLE TRANSFORMER (USE JUMPER WIRE) TRANSFORMER THERMOSTAT HEAT PUMP TRANSFORMER THERMOSTAT HEATING HEATING HEATING HEATING HEATING REVERSING VALVE COMPRESSOR COOLING COMPRESSOR COOLING REVERSING VALVE COOLING FAULT DETECT CONVENTIONAL HEAT/COOL TWO TRANSFORMER (REMOVE JUMPER) HEAT PUMP TWO TRANSFORMER (REMOVE JUMPER WIRE) TRANSFORMER...

  • Page 6: Indoor Air Quality Wiring Diagrams

    Description (bold) and setting range TRANSFORMER Connection Type Selects if the thermostat connects with an automation Automation System system or an Aprilaire account . Aprilaire Cloud Installer Temperature Scale This selection only effects the installer setup menus . Fahrenheit Celsius Contractor Information Input Enter contractor’s contact information .

  • Page 7: Thermostat System Settings Table

    SETUP & TESTING SETUP & TESTING HVAC INSTALLER SYSTEM SETTINGS TABLES HVAC INSTALLER SYSTEM SETTINGS TABLES (CONTINUED) (CONTINUED) Thermostat System Settings Table Thermostat System Settings Table (continued) Factory default setting Factory default setting System setting Description (bold) and setting range System setting Description (bold) and setting range...

  • Page 8: Indoor Air Quality System Settings Tables

    November The use of an outdoor temperature sensor (recommended) enables additional Indoor Air Quality functionality . December Please refer to the Model 8840 Owner’s Manual for further information about thermostat features . January February Note: Refer to manuals for humidifier, dehumidifier, air cleaner, and ventilation products for recommended...

  • Page 9: Air Cleaning System Settings Table

    SETUP & TESTING SETUP & TESTING Air Cleaning System Settings Table Factory default setting (bold) System setting Description and setting range Factory default setting System setting Description (bold) and setting range Enable Low Vent Enables low ventilation temperature lockout limit . (Only Temperature Limit available if Outdoor Sensor is set to Installed or Automation .) Air Cleaner Installed?

  • Page 10: Wifi Setup

    SETUP & TESTING QUICK REFERENCE TO CONTROLS & DISPLAY WI-FI SETUP HOME SCREEN The 8840 can be connected to a Wi-Fi network either at the thermostat or another Wi-Fi device with a web browser . THERMOSTAT NAME HEAT SETTING COOL SETTING...

  • Page 11: Thermostat Features

    QUICK REFERENCE TO CONTROLS & DISPLAY THERMOSTAT FEATURES • Remote access and control over Wi-Fi . • Displays room temperature, room humidity, INSTALLER MENU temperature setting, and optional outdoor temperature . • Indoor air quality control . USB SETTINGS AIR CLEANER –...

  • Page 12: Troubleshooting

    TROUBLESHOOTING SPECIFICATIONS DISPLAY IS BLANK HEAT PUMP ISSUES COOL AIR IN HEAT MODE, Environment OR WARM AIR IN COOL MODE Temperature (shipping) -30° to 150°F (-34° to 65°C) If Power LED is not illuminated at the equipment • Check wiring at the terminal block to confirm the control module check the following: Temperature thermostat (operating) 32°...
  • Page 13 P .O . Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 www.aprilairepartners.com 61001172 2 .17 U .S . Patent Numbers 8,146,376, 8,596,078 and other patents pending . B2206592D © 2017 Aprilaire – A division of Research Products Corporation...

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