DIAGRAM 7 – FIRST STAGE RADIANT FLOOR HEAT

SECOND STAGE FURNACE ONE STAGE OF COOLING

ONE STAGE FURNACE

 

 

 

APRILAIRE MODEL

 

 

 

 

8870 THERMOSTAT

 

 

120

 

 

 

 

 

 

 

 

 

 

 

 

 

C

 

L2

VAC

L1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R

 

 

 

 

 

 

 

 

RC

 

 

 

 

R

 

 

 

RSR

SEE

 

24

 

 

 

 

RH

 

 

 

 

 

 

 

VAC

 

 

 

 

 

RSC

NOTE

 

 

C

 

 

 

 

 

 

 

 

 

 

 

RSB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REMOTE SENSOR(S)

 

FAN

 

 

G

 

 

 

 

RSA

 

 

 

 

 

 

 

 

 

RELAY

 

 

 

 

 

 

REF

 

 

 

 

 

 

 

 

 

 

1ST

 

 

 

 

 

O

 

 

 

 

 

 

 

B-

 

 

STAGE

W1

 

 

 

G

 

 

HEAT

 

 

 

 

B+

 

 

 

 

 

 

 

 

 

1ST STAGE

Y1

 

 

 

W1

 

 

 

 

 

A-

 

 

 

COOL

 

 

 

 

Y1

 

 

 

 

 

 

 

 

COMMUNICATION TERMINALS A+

 

COOLING EQUIPMENT

Aprilaire Model 8024

W2

 

 

 

Y2

B

 

 

 

 

 

24-volt Relay Pack

 

 

1ST

 

 

 

 

 

 

 

STG

 

 

Y1

 

(not supplied)

 

 

 

 

COOL

 

 

 

 

 

 

 

 

 

 

 

 

C

24V

1 W

 

IMPORTANT!

 

 

 

 

COM

 

 

 

 

 

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

RADIANT FLOOR HEAT

E/W2

3

R

 

The thermostat B

 

 

 

terminal is for reversing

 

 

 

 

 

4

 

 

1ST

 

 

 

 

 

valve-heat. DO NOT

 

 

 

 

 

 

 

 

STAGE

W

 

5

 

 

 

 

 

 

connect the B terminal

 

HEAT

 

 

Y

6

 

 

 

 

 

C

 

 

 

to common side of

 

24

 

 

 

 

 

 

 

 

 

7

Y

 

transformer.

 

 

VAC

 

R

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

L2

120

L1

 

O

9

 

 

 

 

 

 

 

 

 

 

 

VAC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24V FIELD WIRING

FACTORY WIRING

OPTIONAL 24V

FIELD WIRING (SEE NOTE)

NOTE: HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation. If the Automation system is to be installed after the HVAC installation, leave the R and C terminals connected to ensure the HVAC system operates. If the automation system is installed before the HVAC wiring, then DO NOT connect HVAC wires to R and C.

22

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Image 24
Aprilaire 8870 installation instructions Connect the B terminal

8870 specifications

The Aprilaire 8870 is an advanced smart thermostat that is designed to provide homeowners with precise temperature control, energy efficiency, and ease of use. As an integral part of any modern HVAC system, the 8870 stands out with its sleek design and innovative features that enhance comfort and convenience in everyday living.

One of the most notable features of the Aprilaire 8870 is its Wi-Fi connectivity, which allows users to control their home environment remotely via a smartphone or tablet. This means that homeowners can adjust the temperature, set schedules, and monitor energy usage even when they are away from home. The user-friendly mobile application makes it easy to manage heating and cooling preferences effortlessly.

The touchscreen interface on the 8870 is intuitive, providing a clear display of temperature settings, humidity levels, and system status. The thermostat’s large, easy-to-read screen is backlit, making it convenient for users to operate even in low-light conditions. Additionally, the customizable settings enable users to create personalized schedules based on their lifestyle, promoting energy savings and comfort.

One of the standout technologies integrated into the Aprilaire 8870 is its programmable humidity control. This feature helps maintain optimal humidity levels, enhancing indoor air quality and preventing potential issues such as mold growth and discomfort caused by dry air. By monitoring both temperature and humidity, the thermostat ensures a balanced and healthy indoor environment.

Moreover, the Aprilaire 8870 incorporates energy-saving features such as adaptive scheduling and smart alerts. Adaptive scheduling learns from the homeowner's behavior and adjusts the heating and cooling cycles accordingly. Smart alerts inform users of maintenance needs, filter changes, and extreme temperatures, ensuring that the HVAC system runs efficiently and reliably.

In summary, the Aprilaire 8870 is not just a conventional thermostat; it is a smart home device that optimizes comfort and energy efficiency. With its remote access, programmable settings, humidity control, and user-friendly technology, the 8870 exemplifies how modern thermostats can significantly enhance the home experience. Whether controlling the climate from afar or simply enjoying the ease of a customizable schedule, users can expect improved comfort and lower energy costs with this intelligent thermostat.