COMMUNICATING THERMOSTAT SYSTEM INSTALLATION MANUAL
This manual will guide the installer through the installation, wiring and checkout of an Aprilaire
System. For a complete command set with programming suggestions, see the programming manual (Part No. 10009414). Please visit
www.aprilairepartners.com/docs/literature for this document.
TABLE OF CONTENTS
Collect the components needed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Connect multiple distribution panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Check-out HVAC system operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Appendix 2 - Sensor averaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
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.
2
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WARNING
Model 8800 Communicating Thermostat