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This manual will guide the installer through the installation, wiring and checkout of an Aprilaire Model 8870 Communicating
Thermostat System. Instructions for the Aprilaire 8840 Series communicating thermostat system are found in a separate
document (DP 10004345). A portion of the command set is found in Appendix 2 in this manual. For a complete command set
with programming suggestions, see the programming manual (DP 10005756). Contact Research Products Corporation for
these documents at 888-782-8638.
COMMUNICATING THERMOSTAT SYSTEM INSTALLATION MANUAL
WARNING
1. 120 volts may cause serious injury from electrical shock. Disconnect electrical power to the HVAC system before
starting installation. This system is a low-voltage system.
2. Improper installation may cause serious injury from electrical shock. This system must be installed by a qualified
contractor in accordance with NEC Standards and applicable local and state codes.
THERE ARE 14 STEPS INVOLVED IN THE INSTALLATION OF A COMPLETE SYSTEM.
Step 1 GET ALL THE COMPONENTS YOU WILL NEED 1
Step 2 DISCONNECT POWER TO ALL HVAC EQUIPMENT AND/OR ZONE CONTROL PANELS 2
Step 3 RUN THE REQUIRED WIRES 3
Step 4 LOCATE AND MOUNT THE AUTOMATION SYSTEM COMPONENTS 4
Step 5 CONNECT THE CONTROL WIRES TO THE HVAC/ZONE SYSTEM AND THERMOSTATS 6
Step 6 CONNECT THE COMMUNICATION AND POWER WIRES TO THE DISTRIBUTION PANEL AND THERMOSTAT 8
Step 7 CONNECT MULTIPLE DISTRIBUTION PANELS 9
Step 8 CONNECT PROTOCOL ADAPTER TO THE DISTRIBUTION PANEL AND HOST COMPUTER OR AUTOMATION SYSTEM 10
Step 9 PROVIDE POWER TO THE DISTRIBUTION PANEL 11
Step 10 TURN ON POWER TO ALL HVAC EQUIPMENT AND TO THE THERMOSTATS 11
Step 11 CHECK-OUT HVAC SYSTEM OPERATION 11
Step 12 ADDRESS THE THERMOSTATS AND SET HIGHEST ADDRESS 12
Step 13 SETUP COMPUTER FOR COMMUNICATION SYSTEM CHECKOUT 13
Step 14 CHECK-OUT COMMUNICATIONS TO THE THERMOSTAT NETWORK 16
Appendix 1 SPECIAL CONSIDERATIONS FOR INSTALLING THE MODEL 8870 WITH THE 8840 SERIES
COMMUNICATING THERMOSTAT 17
Appendix 2 APRILAIRE COMMAND SET 19
EXTRA NETWORK INTERCONNECTION WORKSHEET 21
© Research Products Corp.