Aprilaire 8620 Installation Instructions

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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
Air cleaning sytem settings table ..............10
Humidifier system settings table ...............10
Dehumidifier system settings table .............11
Ventilation system settings table............11-12
Climate map for ASHRAE fresh air setup ..........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

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”