User manual HONEYWELL T8631A

[. . . ] Chronotherm III for Comfort and Convenience OWNER'S GUIDE Congratulations!You made a smart choice when you purchased your new Honeywell Communicating Chronotherm III Thermostat. It's the smart thermostat that: s Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning should go on to have the house at the desired comfort temperature by the time you wake up. s Saves the maximum amount of energy and money by remembering to automatically set back the heat or air conditioning when you leave home. [. . . ] How can the T8631A Thermostat save energy when it comes on and off so many times early in the morning hours?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. Sometimes my Chronotherm III Thermostat doesn't allow the house temperature to drop to my SLEEP setting before it starts bringing the furnace on. The whole point of Adaptive Intelligent RecoveryTM is to save energy without sacrificing comfort. If necessary, the Adaptive Intelligent RecoveryTM will override your temperature settings to assure accurate temperature recovery with optimum comfort and energy savings for the current conditions. 34 ANSWERING COMMON QUESTIONS ABOUT THE CHRONOTHERM III THERMOSTAT 9. Can I stop the thermostat from bringing the heat on so early in the morning?T8631A has screws on the back of the thermostat that will allow you to turn off Adaptive Intelligent RecoveryTM. On the T8631R without the screw to override Adaptive Intelligent RecoveryTM, you will only be able to set one completely automatic energy savings period; the second period must be ended manually. Also, since recovery starts at the time you programmed, the comfort temperature may not be reached by the desired time. Here's how to override Adaptive Intelligent Recovery setting: s Set the desired WAKE program temperature. s Set the WAKE program time 30 to 60 minutes before the time you normally get up. If the house reaches the comfort temperature too early, set the time later; if it reaches the comfort temperature too late, set the time earlier, but don't go beyond 90 minutes. ) s Set the desired SLEEP program time and temperature. The SLEEP temperature must not be more than 10 degrees below the comfort setting. s Set the RETURN program time to 10 minutes before your programmed WAKE time. s Set the RETURN program temperature the same as the SLEEP temperature. s The LEAVE program remains blank unless you want a day energy saving period. s The thermostat will think that it doesn't need to start recovery until 10 minutes before your WAKE time. It will run the furnace constantly until the comfort temperature is reached. Do you have a heat pump with auxiliary heat? If so, we don't recommend overriding Adaptive Intelligent RecoveryTM because the amount of expensive auxiliary heat needed for recovery can cost more than the energy saved by lowering the temperature. 35 EXAMPLE: PERIOD WAKE LEAVE SLEEP RETURN TEMPERATURE TIME SETTING SETTING 5:30 AM 70° F -- -- 10:00 PM 60° F 5:20 AM 60° F s The first person home must push the CHANGE TO LAST PERIOD key to start warming the house. The furnace will run constantly until the comfort temperature is reached. Some high efficiency furnaces need the cycle rate set at the Hot Water setting instead of the factory setting of gas/oil warm air. [. . . ] 12-13 System light . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 System switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13 Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]