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Aprilaire 8620 Installation Instructions

Aprilaire 8620
11 pages
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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

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Aprilaire 8620 Specifications

Operating Environment IconOperating Environment
control range temperature40º to 99ºF (4º to 37ºC)
display range temperature32º to 99ºF (0º to 40ºC)
storage temperature-30º to 140ºF (-34.4º to 60ºC)
operating humidity5% to 90% relative humidity (non-condensing)
operating ambient temperature32º to 120ºF (0º to 48.9ºC)
shipping temperature range-30º to 140ºF (-34.4º to 60ºC)
Power IconPower
ac voltage24 VAC (18-30 VAC)
ac power18-30 Volt AC
dc power3.0 Volts DC (2 “AA” Alkaline batteries included)
maximum load per terminal1 amp
total maximum load2.5 amp
Screen IconScreen
screen size10.3 sq. in.
screen backlightFully back lit w/ constant low intensity light option
Weight and Dimensions IconWeight and Dimensions
height4 15/16”
width6”
depth1 5/16”

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