Equipment Type Selection Switch (Sw1); Installer Setup Menu; Change System Settings - Aprilaire 8620 Safety & Installation Instructions

INSTALLATION
INDOOR AIR QUALITY EQUIPMENT WIRING DIAGRAMS
DEHUMIDIFIER WIRING
I2 C I1 O/B Y Y2 G RC R W2 W L S2 S1 T1 T2
VENTILATION WIRING
I2 C I1 O/B Y Y2 G RC R W2 W L S2 S1 T1 T2
Note: The I1/I2 output is a dry contact closure . The humidifier wiring diagram assumes the control is powering a
solenoid valve . The dehumidifier wiring diagram is for a normally open dry contact input . The ventilation diagram
assumes the control is for a normally closed damper . Please see the individual humidifier, dehumidifier or ventilation
installation instructions for product specific wiring details .
6 English
HUMIDIFIER WIRING
I2 C I1 O/B Y Y2 G RC R W2 W L S2 S1 T1 T2
SETUP & TESTING

EQUIPMENT TYPE SELECTION SWITCH (SW1)

This thermostat has the option of being used in heat
pump or heat/cool systems . Switch SW1 located on the
back of the thermostat's face is used to select this option .
This setting is displayed in the Installer System Settings
under Equipment Type .
Note: Thermostat reboots within 10 seconds after switch
position is changed .

INSTALLER SETUP MENU

HOW TO ENTER THE INSTALLER SETUP MENU AND SELECT EQUIPMENT TO SETUP:
In the Installer Setup, HVAC or Indoor Air Quality setup can be selected . If Indoor Air Quality setup is selected, the
user can then select to set up Air Cleaning, Humidification, Dehumidification or Ventilation .
Press [MODE] to set system to OFF .
Press [MENU] to enter main menu .
Press and hold [SETUP] for seven seconds, [INSTALL
SETUP] appears .
Press [INSTALL SETUP] to enter installer setup menu .

CHANGE SYSTEM SETTINGS

SETTING SETTING
DESCRIPTION NUMBER
SETTING
OPTIONS
SW1
HC
HEAT/COOL
HP
HEAT PUMP
HC
HP
Press or to adjust the option .
Press [MENU] to exit .
Press [NEXT] to select option .
If Indoor Air Quality was selected, Press or
adjust the Outdoor Sensor setting or Indoor Air Quality
option .
Press [NEXT] to select Outdoor Sensor setting or
Indoor Air Quality option .
System Settings can now be changed .
Press [NEXT] or [BACK] to page through the settings .
Press or to adjust the setting .
Press [DONE] to save and exit, or [CANCEL] to exit
without saving .
The thermostat will discard changes and exit if nothing is
pressed within 60 seconds .
To reset the installer settings to the default, reset the
thermostat by pressing the [RESET] button for 5 seconds .
Note: The reset button is disabled when the thermostat
is removed from the wall for programming .
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