Installation

Installation location recommendations

Thermostat should be mounted:

• On an interior wall, in a frequently occupied space.

• Approximately 5‘ above floor.

• At least 18” from outside wall.

Do not mount thermostat:

• Behind doors, in corners or other dead air spaces.

• In direct sunlight, near lighting fixtures, or other

appliances that give off heat..

Remote temperature sensor (optional)

A remote temperature sensor can be used if the thermostat has to be mounted in a concealed location.. A 8051 flush mount or 8053 surface mount remote temperature sensor can be attached to the T1 and T2 terminals and mounted in a recommended area.. The remote sensor must be enabled in the installer setup menu.. When the remote sensor is installed it overrides the internal sensor..

• Thermostat can be mounted to a vertical junction box.

Outdoor temperature sensor (INCLUDED)

• On an outside or unconditioned area wall.

• In the flow of a supply register, in stairwells, or near

outside doors..

• On a wall with concealed pipes or ductwork.

Remote temperature sensor should be mounted:

•On an interior wall, in a frequently occupied space.

•Approximately 5‘ above floor.

•At least 18” from outside wall.

•Using less than 300’ of wire.

Do not mount remote sensor:

• Behind doors, in corners or other dead air spaces.

• In direct sunlight, near lighting fixtures, or other

appliances that give off heat..

• On an outside or unconditioned area wall.

• In the flow of a supply register, in stairwells, or near

outside doors..

Outdoor temperature can be measured by attaching the included 8052 sensor to the S1 and S2 terminals.. The outdoor sensor must be enabled in the installer setup menu..

Heat pump models can use the outdoor temperature to effectively utilize the heat pump:

•When the outdoor temperature is less than the Low Balance Point, the heat pump will be locked out and only auxiliary heating will be used.

•When the outdoor temperature is higher than the High Balance Point, the auxiliary heating will be locked out and only the heat pump will be used to provide heating..

Indoor Air Quality functions can use the outdoor temperature sensor to:

•Control humidification setpoint based on outdoor temperature to prevent condensation

•Lock out humidification for temperatures over 60°F or below -30°F.

•Lock out ventilation based on high and/or low outdoor temperatures.

•Display outdoor temperature on thermostat.

Outdoor temperature sensor should be mounted:

•On side of building out of direct sunlight (north side recommended).

•Above snow line.

•At least 3’ away from exhaust vents and condensing lines.

•Using less than 300’ of wire.

•Do not route wires along 120 VAC lines.

I1 O/B Y Y2 G RC R W2 W

L S2 S1 T1 T2

• On a wall with concealed pipes or ductwork.

• Near 120 VAC lines.

I1 O/B Y Y2 G RC R W2 W

L S2 S1 T1 T2

Thermostat mounting

1..Remove the rear mounting plate from the thermostat..

2..Pull wires through the opening on the back of the thermostat..

3..Position and level the mounting plate of the thermostat on wall and mark the hole locations with a pencil..

4.Drill 1/4” holes and insert supplied anchors

(drywall only)..

5.Place mounting plate over anchors, insert and tighten screws..

6..Seal wire entry holes to prevent drafts affecting temperature readings..

8620 specifications

The Aprilaire 8620 is a cutting-edge thermostat designed to enhance home comfort while promoting energy efficiency. This advanced device combines innovative features and smart technology, making it an ideal choice for homeowners seeking to optimize their HVAC systems.

One of the standout features of the Aprilaire 8620 is its user-friendly interface. The thermostat boasts a large, easy-to-read display that allows users to quickly navigate through its settings. This intuitive design ensures that adjusting temperature settings or changing modes is a hassle-free experience. The backlit screen is especially beneficial in low-light situations, providing visibility for users at any time of day.

The Aprilaire 8620 is equipped with a programmable scheduling feature that enables users to create tailored heating and cooling schedules. This functionality allows homeowners to set specific temperatures for different times of the day, ensuring maximum comfort when they are home while minimizing energy use when away. The advanced programming capability promotes energy savings by automatically adjusting the temperature settings based on user preferences and daily routines.

Furthermore, the thermostat incorporates Wi-Fi connectivity, allowing for remote access through a smartphone application. This feature enables users to monitor and adjust their home’s temperature from anywhere, providing ultimate control and flexibility. Notifications and alerts can also be sent to the user’s mobile device, ensuring they are always informed about their HVAC system's performance.

Another key characteristic of the Aprilaire 8620 is its compatibility with multiple heating and cooling systems. Whether a home utilizes a single-stage or multi-stage system, the thermostat can seamlessly integrate, providing a versatile solution for various HVAC setups. This compatibility ensures that users can make the most of their existing equipment without costly upgrades.

Additionally, the thermostat offers advanced humidity control features, which work in conjunction with Aprilaire's whole-home humidifiers and dehumidifiers. This technology not only improves overall indoor air quality but also enhances comfort levels by managing humidity effectively, preventing issues like mold growth and allergens.

In summary, the Aprilaire 8620 stands out as a premium thermostat option that combines user-friendly design, programmable scheduling, Wi-Fi connectivity, compatibility with multiple systems, and advanced humidity control. With its suite of features and smart technology, it represents a significant investment in home comfort and energy efficiency for any homeowner.