Aprilaire 8840 - Add Thermostat to User Account

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Note: Outputs are 24VAC dry contact. Refer to individual product installation instructions for more details.
INDOOR AIR QUALITY WIRING DIAGRAMS
INDOOR AIR QUALITY WIRING WITH SEPARATE TRANSFORMERS
INDOOR AIR QUALITY WIRING WITH A SINGLE TRANSFORMER
TRANSFORMER
TRANSFORMER
TRANSFORMER
VNT
DH
HUM
EAC
DH
DH
nc
com
no
DEHUMIDIFIER
NORMALLY
CLOSED DAMPER
HUMIDIFIER
PILOT RELAY FOR
120 VAC TO EAC
Note: Outputs are 24VAC dry contact. Refer to individual product installation instructions for more details.
no
com
nc
DH
DH
EAC
HUM
DH
VNT
TRANSFORMER
HUMIDIFIER
NORMALLY
CLOSED DAMPER
DEHUMIDIFIER
PILOT RELAY FOR
120 VAC TO EAC
POWER & RESET OPTIONS
The equipment control module is powered from 24VAC. The thermostat is powered from the equipment control
module. In the case of power loss the thermostat will maintain the clock for 24 hours. The thermostat has a memory
backup that saves the thermostat settings in case of power interruption.
The factory reset is located in the Installer Tools option of the Installer Menu. See Installer System Settings section
for details.
SETUP & TESTING
INSTALLER SETUP WIZARD
The first time the thermostat is powered up (or after a factory reset) it will enter the Installer Setup Wizard. All
installer settings can be set in this process. The installer settings are also accessible in the MENU by pressing the
Contractor Info button for 10 seconds.
Import USB settings will be the first screen
that you see (the button will be grayed out
until a USB drive is inserted).
• If you have a USB drive with installer setup
files on it, insert it into the USB connector
(on the lower left corner) to import a file.
• Or press skip to proceed with the Installer
Setup Wizard.
Note: Installer setup files can be created from
the Export Setup option found under Installer
Menu > Installer Tools > Export Setup.
The following tables contain the system settings and their details. Default settings are shown in bold. Some settings
are only available dependent upon the value of other settings.
General System Settings Table
System setting Description
Factory default setting
(bold) and setting range
Connection Type Selects if the thermostat connects with an automation
system or an Aprilaire account.
Automation System
Aprilaire Cloud
Installer Temperature Scale This selection only effects the installer setup menus. Fahrenheit
Celsius
Contractor Information Input Enter contractor’s contact information. Company, Phone, Email, Web
HVAC INSTALLER SYSTEM SETTINGS TABLES