Aprilaire 8620 Installation Instructions Manual

Safety & Installation Instructions Table of contents Installation location recommendations . . . . . . . . . . . . 2 Outdoor temperature sensor (included) . . . . . . . . . . . . 2 Remote temperature sensor (optional) . . . . . . . . . . . . . 3 Thermostat mounting . . . . . . . . . ...

Thermostat should be mounted: • On an interior wall, in a frequently occupied space. • Approximately 5‘ above floor. • At least 18” from outside wall. • Thermostat can be mounted to a vertical junction box. Do not mount thermostat: • Behind doors, in corners or other dead air spaces. • ...

Installation notes: • Ensure power at the HVAC equipment is off. • Loosen screw terminals, insert stripped wire and re-tighten. • Push the excess wire back into the opening and plug the wall opening to prevent drafts. Installation I1 & I2 – Indoor Air Quality control output C – C ...

Installer setup menu Change System Settings 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 ...

and setting range 19. Fourth Stage Differential 4th stage differential. 1°F (0.5°C) 1°F to 9°F (0.5°C to 4.5°C) 20. Heat Blast Enables the Heat Blast feature. Disable Enable 21. Blast Offset Amount of heating when Heat Blast is initiated. 3°F (2°C) 3°F to 5°F (2°C to 3°C) 22. Screen ...

Dehumidifier System Settings Table Note: Dehumidifier control can only be set to whole home if ventilation and humidification are not installed. System setting Description Factory default setting (bold) and setting range Dehumidifier Control Selects method of dehumidification.(If set to none, no other dehumidifier settings will be availabl ...

Ventilation System Settings Table (continued) System setting Description Factory default setting (bold) and setting range Number of Bedrooms Selects the number of bedrooms to be used for the ASHRAE calculation. (Only available if fresh air setup is set to ASHRAE.) 3 Bedrooms 1 to 6 Bedrooms Number of Occupants Selects the number of occupan ...

While the equipment test is active the corresponding test information will be shown. Press [NEXT] to accept the selection and proceed to the next test selection. Temperature Equipment Test Selection Humidity Outdoor Temperature Output StatuS Test that is active Setup & Testing Each equipment test will begin with the selection ...

W W2 Y Y2 G 1st Stage Test ON ON 2nd Stage Test ON ON ON Heat Pump Cooling Equipment Test W W2 Y Y2 O/B set to G O B 1st Stage Test ON ON ON 2nd Stage Test ON ON ON ON Note: System Variable 31, O/B operation selects O or B. Fan Equipment Test W W2 Y Y2 G ON Humidification Equipment Test I1/I2 G ON ON Dehumidification Equ ...

• Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If thermostat is battery powered, make sure fresh AA alkaline batteries are correctly installed. Heating system does not respond (“HEATING” appears on sc ...