Aprilaire 8400 owner manual About your new thermostat Non-programmable models

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About your new thermostat – Non-programmable models

Controls & display overview – models 8444, 8446, 8448

Current Indoor Temperature	Outdoor Temperature (OPTIONAL)
System Mode
Setting	Temperature SetTING
	Temperature SetTING
	Equipment Status

System Mode (page 6)

Fan Setting (page 7)

Fan Setting

UP

down

Heat pump models only

Emergency heat (RED) System FAULT (YELLOW)

Indicator shows through housing

Quick Reference Card

Battery Door

Message CenterLow Battery Warning (page 7)

Note: Backlight is activated with first button press and automatically turns off.

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61000651B 8400 Tstat Owners.indd 4

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Contents Series Thermostats Table of contents How to identify your thermostat’s model number Thermostat Features All 8400 series thermostatsAbout your new thermostat About your new thermostat Non-programmable models Controls & display overview models 8444, 8446About your new thermostat Programmable Models Controls & display overview models 8463, 8465Operation ALL Models Change temperature setTINGPress Reset service reminder messages Select fan setting ON/AUTO/CIRCBattery installation and reset button Set time and day Understanding program schedulesProgressive recovery ExampleChanging program schedules To cancel the permanent override press Electronic Thermostat Five Year Limited Warranty Warranty Registration