Aprilaire 8620 Safety & Installation Instructions

TABLE OF CONTENTS
Installation location recommendations.............2
Outdoor temperature sensor (included).............2
Remote temperature sensor (optional) .............3
Thermostat mounting...........................3
Power & reset options..........................4
Wiring terminal ...............................4
INSTALLATION
SETUP & TESTING
REFERENCES
WIRING DIAGRAMS
Equipment type selection switch (SW1) ............7
Installer setup menu ...........................7
Change system settings.........................7
HVAC installer system settings table ............8-9
Indoor Air Quality system settings tables.......10-12
Air cleaning sytem settings table ..............10
Humidifier system settings table............10-11
Dehumidifier system settings table.............11
Ventilation system settings table...............12
Removal of Indoor Air Quality control buttons ......13
System test menu .........................13-14
System test tables.........................15-16
Quick reference to controls & display.............17
Troubleshooting ..............................18
Error codes ..................................19
Thermostat features ..........................19
Specifications................................20
Conventional heat/cool single transformer..........5
Conventional heat/cool two transformer ...........5
Heat pump single transformer....................5
Heat pump two transformer .....................5
Indoor Air Quality equipment – dehumidifier . . . . . . . .6
Indoor Air Quality equipment – humidifier . . . . . . . . . .6
Indoor Air Quality equipment – ventilation..........6
Model 8620 Thermostat with
Event-Based
™
Air Cleaning and
Humidity or Ventilation Control
Safety & Installation
Instructions
READ AND SAVE THESE INSTRUCTIONS
10009857 B2205748D 2.17
English 1

Aprilaire 8620 Specifications

Operating Environment

control range temperature	40º to 99ºF (4º to 37ºC)
display range temperature	32º to 99ºF (0º to 40ºC)
storage temperature	-30º to 140ºF (-34.4º to 60ºC)
operating humidity	5% to 90% relative humidity (non-condensing)
operating ambient temperature	32º to 120ºF (0º to 48.9ºC)
shipping temperature range	-30º to 140ºF (-34.4º to 60ºC)

Power

ac voltage	24 VAC (18-30 VAC)
ac power	18-30 Volt AC
dc power	3.0 Volts DC (2 “AA” Alkaline batteries included)
maximum load per terminal	1 amp
total maximum load	2.5 amp

Screen

screen size	10.3 sq. in.
screen backlight	Fully back lit w/ constant low intensity light option

Weight and Dimensions

height	4 15/16”
width	6”
depth	1 5/16”