Honeywell T8631A Owner's Manual - Page 20

ANSWERING COMMON QUESTIONS ABOUT THE CHRONOTHERM III THERMOSTAT 1. The temperature displayed on the Chronotherm III Thermostat doesn't always match the room temperature on another thermometer located right next to it. Why? The Chronotherm III Thermostat is a very accurate instrument designed to sense both air temperature and wall temperature, like your body does. It gives an average reading over a period of time. Because it adjusts itself, it will take a few days after installation to adjust to your home. 2. A v triangle symbol is on the display sometimes. What does it mean? The T8631 Communicating Chronotherm III Thermostat can be connected to a Honeywell TotalHome system for external access and control. Whenever the thermostat is controlling to TotalHome system settings, a v appears under the room temperature display. 3. Why does the T8631 follow a schedule not programmed into the thermostat? When the v is displayed, the thermostat is controlling to the setting in your TotalHome system. 4. How many hours in advance of my WAKE time should the furnace come on? The time will vary, up to 24 minutes per degree Fahrenheit difference between the energy saving and comfort temperatures, depending on outside temperature and performance during the past 24 hours. A microchip computer with Adaptive Intelligent Recovery™ allows the thermostat to think for itself and adjust the furnace or air conditioning recovery time to reach your desired comfort temperature at the programmed time. Whenever the temperature is more than one degree hotter or colder than the comfort temperature at the programmed time, the system turns on earlier the next day. This approach ensures the temperature won't over- or under-shoot the set point and allows the proper amount of time for recovery. 33 5. What does the HOLD key do? It bypasses all program settings and holds the temperature at the present setting. To increase or decrease the temperature while on HOLD, use the WARMER-COOLER keys. Pressing the thermostat's RUN PROGRAM key or entering a change at the external system will return the device to programmed operations. 6. How long does the HOLD key hold? Forever! The HOLD key will hold the temperature indefinitely. The only way to release it is to press the RUN PROGRAM key or enter a change at the TotalHome system. 7. How can the T8631A Thermostat save energy when it comes on and off so many times early in the morning hours? Two ways. First, it saves energy (and money) by setting back the temperature for blocks of time during the day or night. Second, it conserves energy by recovering gradually to the desired temperature. This prevents overshooting your comfort set point (and wasting energy) or under-shooting the comfort set point (and forcing you to change the thermostat setting, also wasting energy). Honeywell experts have invested years of engineering and in-home testing to assure that this is the most effective way to set back and save energy while optimizing your comfort. 8. Sometimes my Chronotherm III Thermostat doesn't allow the house temperature to drop to my SLEEP setting before it starts bringing the furnace on. Why? Many factors affect your comfort and energy savings. If those factors, such as weather, humidity, etc. were always consistent, an unchanging program would work just fine. But factors change. The whole point of Adaptive Intelligent Recovery™ is to save energy without sacrificing comfort. If necessary, the Adaptive Intelligent Recovery™ will override your temperature settings to assure accurate temperature recovery with optimum comfort and energy savings for the current conditions. 34