Glossary

Thermostats

Thermostats

  • Armchair Programming:

    This feature gives you the ability to pull the thermostat off the wall easily and schedule or program it in comfort.

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  • Auto-Season Changeover (Deadband):

    This feature allows the thermostat to switch between heat and cool modes automatically based on the room temperature. The auto season span will also limit how close your heat and cool set temperatures can be set to prevent both systems running simultaneously.

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  • Back or Wall Plate:

    This is usually a separate plate that may or may not have the thermostats terminals on it. Usually the back or mounting plate is attached to the wall first, then the thermostat will connect to it.

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  • Backlight:

    Refers to the light in the thermostat that illuminates the screen.

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  • Compressor:

    The part of any split system responsible for air conditioning, or cooling. This unit is usually placed outside to avoid added noise inside the home.

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  • Cool Runtime:

    When your system is running in cool mode, and the compressor shuts down, your fan will continue to run for a short period to force the remaining cold air in your ducts out into the home.

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  • Cycling:

    Is a term used to describe the way your system turns on and off. If a system is continually turning itself on and off rapidly, it said to be cycling rapidly. May also be used to describe delays in cycling, such as “has a 1 minute cycle delay.”

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  • Energy Monitor:

    Tracks the running hours of your system.

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  • Energy Saver Bar:

    This bar adds a visual aid to see how efficient you may be running your system. By providing bars on a scale of “Good” to “Best”, it lets you know if you could be doing more to save energy.

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  • Filter:

    This refers to the filters in your air handler(fan) or furnace. They should be checked frequently for replacement. Many thermostats have a filter warning on them to indicate when you should check these filters.

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  • Furnace:

    The part of a split system responsible for providing heat. This part of the system is usually inside the home near the fan unit.

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  • Heat Pump:

    A heat pump has both the heating and cooling unit located outside in the compressor. The compressor reverses the flow of Freon to provide heat or cooling inside.

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  • Home Today:

    A temporary temperature change on a programmable thermostat that allows you to set the temperature to the most comfortable setting for the day before returning to programmed schedules.

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  • HVAC:

    Stands for “Heating, Ventilating, and Air Conditioning” and is used many times to refer to your heating and cooling system as a whole.

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  • Package Systems:

    Refers to a separate heating and air conditioning system, where both units are housed in a casing outside.

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  • Permanent Override:

    This mode effectively turns off a programmable thermostat’s ability to change temperatures automatically and allows it to be set to one temperature and stay there.

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  • Recovery:

    A thermostat mode that will turn on your heat or cooling early before a scheduled temperature change. This feature will try and reach the next scheduled temperature change by the set time of the change, versus reaching the set time of the temperature change, and then start heating or cooling.

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  • Refresh Fan:

    Allows the fan to cycle on when the heating or air system has not been on for a set amount of time. The fan will come on, run for a set amount of time, then shut back off to keep the air in the home circulated and fresh.

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  • Relays:

    Small circuits inside the thermostat that turn on or off to control how the thermostat operates your furnace or compressor. The thermostat will “click” when these open or close.

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  • Save Away:

    A temperature override feature that allows you to set back the temperature setting quickly when you need to leave home and want to save energy. It will return back to normal scheduled operation after the set time expires.

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  • Second Stage Cool:

    A conventional or heat pump system that has a two stage compressor. The second stage will activate when the first stage is unable to cool the home in a timely manner.

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  • Second Stage Heat:

    May be used on a heat pump or conventional system. Second stage heat is an actual second heating source that will turn on to assist heating the home until the set temperature is reached.

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  • Set Temperature:

    The temperature you want your system to reach during heating or cooling.

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  • Span (Swing):

    Span or swing adjusts the cycle time of your system by running a set amount of degrees under and over your set temperature. Setting a higher SPAN number increases your cycle time by allowing the system to run longer. A lower number will decrease your cycle time by causing the system to run for a shorter length of time.

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  • Split System:

    This refers to the typical American heat and air system. Called a split system as the heating portion is located inside the home, and the cooling is outside. Thus the unit is split or “separated.”

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  • Stage Timer:

    If you have a multi-stage heat pump, the stage timer works in conjunction with your second stage span to determine when your second stage heat will turn on. If your primary heat runs for a set amount of time without reaching the set temperature, the stage timer will activate your second stage heat.

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  • System Protection:

    A safety precaution built into most Hunter thermostats that protects your system from short cycling to prevent system damage. After the system has shut down, this will prevent it from coming back on for a certain amount of time.

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  • Temporary Override:

    On programmable thermostats, this is a temporary change to your programmed set temperature. Most Hunter thermostats will resume normal operation from temporary override once a new program starts.

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  • Terminals:

    Terminals are located on the back of the thermostat or the back/mounting plate and are what the wires from the wall are connected to.

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  • Thermostat Lock:

    Refers to the ability to lock the thermostat’s keys or touch screen from unwanted key presses or changes. Usually a key, code, or series of button pushes is required to unlock the thermostat.

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  • Vacation Mode:

    Another programmable thermostat function that allows you to set one temperature for a certain amount of days while you will be away from the home. After the timer has run down, the thermostat will resume running its normally scheduled programs.

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