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Threshold Definitions

Jon Ziebell edited this page Feb 8, 2018 · 11 revisions

Threshold Definitions

To get to these settings, you will need to use the Ecobee itself; they are not available in the app or web portal. Touch the menu icon on the bottom left > Settings (Preferences & Defaults) > Installation settings > Thresholds.

Much of this information was sourced directly from the ecobee user manual.

Allows you to use auto mode on the ecobee; useful in the Spring or Fall when you may want to heat or cool your home without having to manually switch between modes.

Heat/Cool Min Delta

Used in auto mode only, this is the minimum difference in your heat/cool setpoints. When set to 5°F, if you set your heat to 65°F then you must have your cool set to at least 70°F. The lower this value the faster your system will switch modes. For example, if your home is in cool mode during the day in the Spring and the temperature begins to drop in the evening, your system will be able to enter heat mode faster (depending on your setpoints) the lower this value is.

Compressor Min Cycle Off Time

This enforces a minimum time that the compressor must be off between cycles. This ensures the compressor does not short cycle (which could negatively affect the operating life of the system). This time is adjustable from 240–900 seconds.

In general, higher values are better for your system but will give you larger temperature swings. Lower values are worse for your system (and more expensive) but provide more comfort.

Compressor Min Outdoor Temperature

This is the outdoor temperature where your compressor will no longer be allowed to run. Even though a heat pump becomes much less efficient and useful at temperatures below 20°F, it still works. This feature is typically used for air-to-air source heat pumps.

AC Overcool Max

Uses the air conditioning to reduce the humidity by cooling beyond the current set point by the configured amount. Note that cooling is still determined by the set point, and the system will not resume cooling until the temperature rises above the current set point. For example, if your cooling set point is 75°F, and this value is set to 2°F, it will allow the AC to overcool to 73°F if the humidity set point has not been met.

Aux Heat Max Outdoor Temperature

This is the maximum outdoor temperature above which the auxiliary heat will not be engaged.

Heat Differential Temperature

The minimum difference between the current temperature and set temperature before the system calls for heat. If your setpoint is to 72°F and this value is 2°F, then the heat will not engage until the temperature is 70°F.

Heat Dissipation Time

The amount of time the fan will run after the heat set point has been reached and the call for heat has been turned off. Running the fan for a period of time allows for any heated air left in the ducts to circulate throughout the home.

Aux Min On Time

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Cool Differential Temperature

The minimum difference between the current temperature and set temperature before the system calls for cool. If your setpoint is is 72°F and this value is 2°F, then the air conditioning will not engage until the temperature is 74°F.

Cool Dissipation Time

The amount of time the fan will run after the cool has been turned off. Running the fan for a period of time allows for any cooled air left in the ducts to circulate throughout the home.

Compressor Min On Time

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Compressor Reverse Staging

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Compressor Stage 2 Temperature Delta

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Compressor Stage 1 Max Runtime

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Compressor to Aux Temperature Delta

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Compressor to Aux Runtime

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Aux Reverse Staging

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Temperature Correction

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Humidity Correction

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Thermal Protect

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Installer Code

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