Model 8476 Thermostat with Event-Based™ Air Cleaning Safety & Installation Instructions READ AND SAVE THESE INSTRUCTIONS
Table of contents Installation Installation Installation location recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outdoor temperature sensor (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Installation Outdoor temperature sensor (optional) Thermostat mounting Outdoor temperature can be measured by attaching an 8052 sensor to the S1 and S2 terminals. System setting #05 (Remote sensor) is used to enable sensor. • Install on side of building out of direct sunlight (north side recommended). Heat pump applications can use the outdoor temperature to effectively utilize the heat pump: • Mount at least 3’ away from exhaust vents and condensing lines.
Installation Wiring terminal Wiring – single Transformer (use Jumper Wire) for HEAT/COOL System NOT USED 2nd HEATING G 2nd COOLING Y NOT USED W OUTDOOR TEMP SENSOR COOLING TRANSFORMER 2nd HEATING 2nd COOLING G NOT USED Y C S1 S2 O/B L W2 Y2 RC R 6 W FAN Y G 1st HEATING W 1st COOLING RC R NOT USED * Jumper between RC & R is used in single transformer systems (see wiring diagrams).
Installation Setup & Testing System setup instructions Wiring – TWO TransformerS (REMOVE Jumper Wire) for HEAT Pump System The following instructions show how to enter the system setup menu and change settings. The table on the following pages lists the settings and their details. Default settings are shown in bold. Some settings are only available based on other setting values.
Setup & Testing Setup & Testing System setup instructions (continued) System setup instructions (continued) The Model 8476 thermostat has the option of being used in heat pump or heat/cool systems. Switch SW1 located on the back of the thermostat’s face is used to select this. System setting number 00 will only be shown on these models to display the position of SW1.
Setup & Testing Setup & Testing System setup instructions (continued) System setup instructions (continued) System setting Setting range, default in bold System setting Setting range, default in bold 09 1st stage differential 1°F (0.5°C) 1°F to 4°F (0.5°C to 2°C) 16 Low Balance Pt. (heat pump only) 20°F (–7°C) 1°F to 35°F (–17°C to 1°C) or “OFF” to disable 10 2nd stage differential 1°F (0.5°C) 1°F to 4°F (0.5°C to 2°C) 17 High Balance Pt.
Setup & Testing Setup & Testing System test mode System test mode (continued) The system test mode is used to test a system after installation. The outputs of the thermostat can be manually activated one at a time to test their function. The following instructions show how to enter the test mode and turn outputs on and off. The charts on the following pages show the output status for each test step for Heat/Cool and Heat Pump mode.
Setup & Testing Setup & Testing Test steps for Heat/Cool System Setting Step Key Input 1st [UP] #50 Heat #51 Cool #52 Fan 2nd [UP] [DOWN] 1st [UP] 2nd [UP] [DOWN] [UP] [DOWN] #2 0 : Gas 1 : Elec 0 : Gas 1 : Elec 01 HEATING ON (W) ON ON ON ON 02 HEATING ON (W2) Test steps for Heat Pump Display (Output) 02 01 COOLING COOLING ON (Y2) ON (Y) System Setting 01 FAN ON (G) Step 1st [UP] ON ON ON Key Input #50 Aux ON 2nd [UP] #12 0 : Gas 1 : Elec 0 : Gas 1 : Elec 02 AUX HEATING ON (W2) Display
Quick Reference to controls & Display Current Indoor Temperature Current Time Thermostat Features Outdoor Temperature (OPTIONAL) System Mode Setting Temperature SetTING Equipment Status clean air Setting UP System Mode down clean air Hold Program HEAT PUMP ONLY Includes Event-Based ™ Air Cleaning Emergency heat (RED) System FAULT (YELLOW) • Event-Based™ Air Cleaning. • Large, clear, backlit display is easy to read – even in the dark.
Troubleshooting Display is blank • Check circuit breaker and reset if necessary. • Make sure power switch at heating & cooling system is on. • Make sure furnace door is closed securely. • If thermostat is battery powered, make sure fresh AA alkaline batteries are correctly installed.
Specifications Specifications Environment Temperature Relative humidity Thermal Operating: 32° to 120°F (0° to 48.9°C) Outdoor temperature sensor Maximum distance: 300 feet Shipping: -30° to 140°F (-34.4° to 60°C) Room temperature measurement Display range: 32° to 99°F (0° to 40°C) Operating: 5% to 90% R.H.
P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357 www.aprilairepartners.com 61000893 12.
