Aprilaire 8870 Installation Instructions Manual
  1. Manuals
  2. Brands
  3. Aprilaire Manuals
  4. Thermostat
  5. 8870
  6. Installation instructions manual
Aprilaire 8870 Installation Instructions Manual

Aprilaire 8870 Installation Instructions Manual

Hide thumbs Also See for 8870:
Table of Contents

Advertisement

Quick Links

Download this manual See also: System Installation Manual, Instruction and Installation Manual

Installation Instructions

MODEL 8870
These instructions are for connecting
the Thermostat to the HVAC equipment.
To connect communication features,
please reference the Communicating Thermostat
System Installation Manual.

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 8870 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Aprilaire 8870

Summary of Contents for Aprilaire 8870

  • Page 1: Installation Instructions

    Installation Instructions MODEL 8870 These instructions are for connecting the Thermostat to the HVAC equipment. To connect communication features, please reference the Communicating Thermostat System Installation Manual.

  • Page 2: Table Of Contents

    Model 8870 Thermostat Specifications ........

  • Page 3: Model 8870 Thermostat Specifications

    MODEL 8870 THERMOSTAT SPECIFICATIONS: 2. WHAT’S IN THE BOX • Thermostat ( Figure 1 ): front panel, cover, and base 24V AC ± 20% Control Voltage • Installation Manual Switched Voltage 18 – 30V AC Cover • Owners Manual Maximum Operating Current 2.0A total at rated voltage, through all outputs.

  • Page 4: Disassembly

    DO NOT locate the thermostat: • Behind doors, in corners or other dead air spaces. FIGURE 3 • In direct sunlight or near lamps, appliances or other sources of radiant heat. • On an outside wall or wall exposed to an unconditioned space (i.e. garage, etc.). •...

  • Page 5: Setting The Dip Switches

    TABLE 2 APPLICATION SWITCH #1 SWITCH #2 SWITCH #3 SWITCH #4 Single Stage Furnace & AC Servant Fossil Single Two Stage Furnace & Two Stage AC Servant Fossil Multi Roof Top Unit (Two Stage Heat & Two Stage Cool) Servant Fossil Multi FIGURE 4...

  • Page 6: Reassemble The Thermostat

    FIGURE 5 7. WIRING THE THERMOSTAT (Cont.) c) Check each wire to ensure it is securely fastened, not broken, and exposed wires are not touching. 8. REASSEMBLE THE THERMOSTAT No tools required – line up pins on circuit board with the corresponding terminal blocks. Use your hands to push the front panel securely to the mounted base.
  • Page 7 FIGURE 7 FIGURE 6 CHECK-OUT PROCEDURE MESSAGE DISPLAY CAUTION: The following check-out procedure will turn the heating and cooling equipment on and off. Do not operate in cooling at low outdoor temperatures. Do not operate in heating at high outdoor temperatures. SCROLL/ Refer to equipment manufacturer specifications for safe operating temperatures.

  • Page 8: Optional Hvac Set-Up Features

    10. OPTIONAL HVAC SET-UP FEATURES B) BALANCE POINTS (Cont.) 1. LOW BALANCE POINT – the outdoor temperature below which compressor terminals There are a number of HVAC features that can be configured for the particular application. will not be energized. These include temperature control options, display options and high/low balance points (heat pumps only).
  • Page 9 FIGURE 8 (Cont.) 11. TO ACCESS THESE HVAC SET-UP FEATURES (Cont.) Set-Up is menu driven but only one menu item is visible at a time. Figure 8 shows the entire Main Menu. Selecting any one of the Main Menu items (by pressing the Enter button) will enter a corresponding Use SCROLL UP Sub-Menu.
  • Page 10 DIAGRAM 1 – SINGLE STAGE FURNACE AND AC DIAGRAM 2 – TWO STAGE FURNACE AND TWO STAGE AC APRILAIRE MODEL TWO-STAGE FURNACE APRILAIRE MODEL 8870 THERMOSTAT ONE-STAGE FURNACE 8870 THERMOSTAT NOTE NOTE IMPORTANT! RELAY The B terminal is for RELAY STAGE reversing valve-heat.
  • Page 11 DIAGRAM 3 – ROOF TOP UNIT (TWO STAGE HEAT AND TWO STAGE COOL) DIAGRAM 4 – BOILER WITH AC (TWO TRANSFORMERS) APRILAIRE MODEL 8870 THERMOSTAT AIR HANDLER ROOF TOP UNIT APRILAIRE MODEL 8870 THERMOSTAT NOTE NOTE RELAY IMPORTANT! 1ST STAGE...
  • Page 12 DIAGRAM 5 – SINGLE STAGE HEAT PUMP DIAGRAM 6 – TWO STAGE HEAT PUMP APRILAIRE MODEL APRILAIRE MODEL 8870 THERMOSTAT 8870 THERMOSTAT INDOOR HEAT PUMP UNIT INDOOR HEAT PUMP UNIT NOTE NOTE RELAY RELAY STAGE HEAT HEAT 1ST STAGE COMPRESSOR...

  • Page 13: Notes

    DIAGRAM 7 – FIRST STAGE RADIANT FLOOR HEAT NOTES: SECOND STAGE FURNACE ONE STAGE OF COOLING APRILAIRE MODEL ONE STAGE FURNACE 8870 THERMOSTAT NOTE RELAY STAGE HEAT 1ST STAGE COOL COOLING EQUIPMENT Aprilaire Model 8024 24-volt Relay Pack (not supplied)
  • Page 14 NOTES: NOTES:...

  • Page 15: Research Products Corporation

    Indoor Air Comfort System is an integrated group of air quality enhancement products designed to work with heating and cooling systems to make homes more comfortable. For the best in indoor air quality, install Aprilaire brand products, to solve your customers’ Indoor Air Comfort needs. Aprilaire...

Table of Contents