Aprilaire 8400 owner manual Operation ALL Models, Change temperature setTING, Press

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Operation – ALL MODELS

Select system mode (OFF/HEAT/EM-HEAT/COOL/AUTO)

Press to select:

AUTO: Thermostat automatically selects heating or cooling depending on the indoor temperature.

OFF: Heating and cooling systems are off.

HEAT: Thermostat controls only the heating system.

COOL: Thermostat controls only the cooling system.

EM-HEAT:Thermostat controls emergency/auxiliary heat. Heat pump will not operate. (only for heat pumps with auxiliary heat on models 8446, 8465, and 8466)

Change temperature setTING

Applies to programmable versions (8463, 8465, 8466) when in HOLD mode.

Press

or

to adjust the current setting.

In AUTO use to switch between the HEAT and COOL setting.

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Contents Series Thermostats Table of contents Thermostat Features All 8400 series thermostats How to identify your thermostat’s model numberAbout 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, 8465Change temperature setTING Operation ALL ModelsPress Select fan setting ON/AUTO/CIRC Reset service reminder messagesBattery 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
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