User manual HONEYWELL T8621

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Manual abstract: user guide HONEYWELL T8621

Detailed instructions for use are in the User's Guide.

[. . . ] Your new Honeywell Chronotherm III Fuel Saver Thermostat is a precision instrument that's quality-built to give you many years of satisfactory service. Each day of the week can be programmed independently so that, regardless of your schedule, you'll save fuel while automatically maintaining the standard of comfort you require. This User's Guide will show you how to get the most benefit from your new thermostat. Programming Your Thermostat . . . . . . . . . . . . . . . l-1 8 Enter the day and time . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] time and the WARMER/COOLER keys to set the heating temperature for each time period. Press and release so COOL shows on the display. Press and release the PERIOD key to step through the time periods, and use the WARMER/ COOLER keys to set the cooling temperature for each period. 14 You have completed the time and temperature program for another day. Now you can copy it into additional days if you wish. l' -a I!H Press and release to enter the copy mode. Press and release the Copy To key to select the day that's flashing, or the Day key to bypass it. Continue, using the Copy To key to bring up the next day, followed by Copy To to select, or Day to bypass the day, until all desired days are selected. Repeat Step 4 as needed until all days are programmed. 15 l0 H , ' H NOTE: The display will show 32" F until the thermostat is mounted on the subbase and the system is powered. [-yx""`l 16 TEMPORARILY CHANGING THE PROGRAM These features let you customtailor the program for those times when someone comes home early, or you or a colleague is working late, or you plan to be out for the evening. Changes made with these keys are active for one program period and then are cancelled. To keep the current temperature through the next program period: Press and release. The name of the period to be skipped will flash in the display until the start time of the skipped period. During the skipped period the display will flash "temporary" to show that the programmed temperature for this period is not being used. 19 To go back to the temperature of the previous program period: 0 CHANGE TO LAST PERIOD Press and release. The display will show the name of the previous period and flash "temporary" until the next regularly scheduled period starts. To temporarily raise or lower the temperature for the current period only: Press and hold until the desired temperature is reached. The display will flash "temporary" until the next programmed time period starts. If you change your mind: Press and release to cancel any of the temporary settings. [, , . . I PERMANENTLY CHANGING THE PROGRAM If your schedule changes or you want a different temperature, you can update any setting without affecting the rest of the program. Press and hold until the desired time period shows on the display. Press and hold until the desired schedule day shows on the display. Press and hold the Time or Temperature keys until the display shows the desired new program. 21 - S You can copy the new program into other days if you wish. When you copy a program, all the times and temperatures for that day are copied. Press and release. Continue until the program has been copied into all desired days. . m IwtOR&bAI Press and release to return to normal operation. I _ 22 OPERATING THE THERMOSTAT MANUALLY This feature is particularly useful when you go on vacation or other extended absence. It does not cancel your program. Press and release. Press and hold to change the temperature setting. After a few seconds the display will show the current temperature. Press and release to check the temperature setting. IPR%AMi Press and release to cancel manual control. 23 CANCELING PROGRAM SETTINGS The thermostat requires time and temperature settings in the MORNING time period for each day, but any of the others can be canceled. Each time period for each day must be canceled separately. - -. . Ea Press and hold until the desired time period shows on the display. m . ' Press and hold until the desired day shows on the display. Press and release to cancel the time and temperature settings for that time period. Both the heating and cooling temperatures will be canceled. You can use the copy function to cancel the program from other days, but remember: all the programs will be copied, not just the cancellation. Press and release to return to normal operation. 24 CHECKING THE PROGRAM TIMES AND TEMPERATURES You can check all the stored settings without affecting the permanent program. Press and hold until the desired period shows on the display. C$Klight (heat pump models Consult your heat pump equipment literature to determine whether this light is used and its meaning. Comfort temperature The temperature you want when you're active and occupying the building. EM HT light (beat pump models only) This light glows whenever the thermostat system switch is in the EM HT~ position. [. . . ] w Press PRESENT SETrING to check the current temperature setting. If desired, change the time or temperature setting. Allowtimefortheheating equipmenttoheatupand thefan to come on before checking for heat at the register. n IF. Display will not come on. s, Cooling will not come on. The building is too warm or too cool. [. . . ]

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