Auto Changeover Deadband. Automatic Changeover Switches Generator Power Solutions Honeywell uses an advanced algorithm that fixes deadband at 0 °F I would not go lower than a 2° deadband If there is a thermostat out there I think the lowest is.
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If you look on Page 8 of your manual you'll notice the following as it concersn Auto changeover differential You can select anywhere between 2-9 degrees Fahrenheit
The differential is there because there will always be overshoot with unitary systems An advanced algorithm fixes the deadband at 0 °F. So apparently deadband only applies to auto changeover (from heating to cooling and vice versa) for this stat but maybe it is used or implemented differently for different features/functions on other devices.
Automatic Changeover Switches Change Over Auto ExpertElectrical.co.uk. Heat pumps are Trane single stage heat with electric backup and single stage cool. You won't find a deadband on a manual thermostat that controls only a furnace or an air conditioner, and you definitely won't find it on an older electromechanical thermostat or any thermostat that you have to set manually
Complete schematic diagram of Automatic Changeover Device Download. There is a menu item for "auto changeover mode deadband" from 2F to 9F and no further explanations Installer function 0310 is auto-changeover deadband