Power & Reset Options; Setup & Testing; Installer Setup Wizard; Hvac Installer System Settings Tables - Aprilaire 8920W Safety & Installation Instructions

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 .

HVAC INSTALLER SYSTEM SETTINGS TABLES

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
Installer Temperature Scale This selection only effects the installer setup menus .
Contractor Information Input Enter contractor's contact information .
10 English
SETUP & TESTING
HVAC INSTALLER SYSTEM SETTINGS TABLES
Thermostat System Settings Table
System setting
Equipment Type
Control Setup
Heat Pump Auxiliary Type
Fan Control In Heating
Number of Compressor Stages
Number of Auxiliary Heat Stages
Number of Stages of Heat
Number of Stages of Cool
Remote Temperature Sensor
Installed?
Return Air Temperature Sensor
Installed?
Outdoor Temperature Sensor
Installed?
Schedule
Factory default setting
(bold) and setting range
Progressive Recovery
Fahrenheit
Celsius
Display Away Button?
Company, Phone, Email, Web
Display Heat Blast Button?
Blast Offset
Extended Fan – Heat
Extended Fan – Cool
Auto Changeover
(CONTINUED)
Description
Note: Equipment Type related settings will return to
defaults if this is changed .
Used to lockout heating or cooling outputs . (Heat/Cool
mode only .)
Selects auxiliary type . (Heat Pump mode only .)
Selects thermostat or equipment to control the fan in
heating . (Heat/Cool mode only .)
Select number of compressor stages . (Heat Pump mode
only .)
Select number of auxiliary heat stages . (Heat Pump
mode only .)
Select number of heat stages . (Heat/Cool mode only .)
Select number of cool stages . (Heat/Cool mode only .)
Select if the remote sensor is attached, and uses backup,
or is averaged with built-in .
Select if return air temperature sensor is attached or not .
Select if outdoor sensor is attached or not .
Enables or disables programmable schedule .
Enables or disables progressive recovery .
Away allows the user to set the thermostat to a
predefined setpoint using a single button press .
The predefined setpoints can be selected in the User
Settings .
Select if the Heat Blast button is displayed .
Amount of heating when Heat Blast is initiated .
Extends fan operation after heat call ends .
Extends fan operation after cool call ends .
Enable or disable Auto Changeover mode .
Factory default setting
(bold) and setting range
Heat/Cool
Heat Pump
Heat & Cool
Heat Only
Cool Only
Gas/Oil Heat
Electric Heat
Gas/Oil Heat
Electric Heat
One
Two
One
Two
One
Two
Three
One
Two
Three
No
Yes
Yes (fallback built-in)
Yes (average w/built-in)
No
Yes
No
Yes
Enabled
Disabled
Enabled
Disabled
No
Yes
No
Yes
3°F (1.5°C)
4°F (2°C)
5°F (2 .5°C)
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
English 11