User manual HONEYWELL T87F

[. . . ] Heating is off. OFF: If you have a Fan Switch, set this first: AUTO: ON: The fan starts a few minutes after the heating equipment comes on. The fan runs continuously for improved air circulation and air quality. 3 69-1181 PROGRAMMING The thermostat is already programmed for your convenience with time and temperature settings. Preprogrammed Time and Temperature Settings. [. . . ] To use the preprogrammed Time and Temperature setting you must first set the current time. To set the current time: a. PM Press the key once. c. WAKE is the time period you want your house at a comfortable temperature during the day. SLEEP is the time period you can set an energy-saving temperature while you sleep. 4 key until End is The preprogrammed Temperature settings can now be used. 69-1181 To change the preprogrammed Time and Temperature settings follow steps 1 through 6. a. b. Use the or keys to set your desired WAKE time. The WAKE time is now set. SET AM PM 3. Use the or keys to set the current time. The clock is now set. Press the key once. The TEMPORARY change is TEMPORARY AM in effect until the next program period. To cancel your TEMPORARY change, press until End is displayed. Hold Function To hold the thermostat at one temperature indefinitely, program both WAKE and SLEEP to the same temperature. Temporary Change a. Press SET or until desired temperature is displayed. PM 7 69-1181 ENERGY SAVINGS You can save energy with this thermostat during the heating season by automatically lowering the temperature setting 5°F (3°C) to 10°F (5°C) at night. PERCENT OF HEATING COSTS YOU CAN SAVE SAVINGS FOR ONCE-A-DAY 10°F (5°C) DECREASE* 6 9 12 14 16 TO TO TO TO TO 8% 11% 13% 15% 18% HEAT YOUR SAVINGS DEPENDS ON HOME SIZE AND ACTUAL HEAT LOSS OR GAIN, GEOGRAPHIC LOCATION, FREQUENCY OF TEMPERATURES CHANGE, AND RANGE IN DEGREES OF CHANGE. M11972 8 69-1181 Symptom Heating does not come on. Corrective Action Check that the heat setpoint is above room temperature. Check that the system switch on the thermostat is set to HEAT. Check the system fuse or circuit breaker and replace or reset if necessary. Check power to the heating equipment. Temperature setting is too warm or too cool. Displays only time and not temperature. Adjust the temperature by pressing either the Check that switch to furnace is on. or key. Check that the thermostat is properly latched on wallplate. The current time is maintained up to 20 minutes after power interruption. Power was interrupted longer than 20 minutes. [. . . ] Power was interrupted longer than 20 minutes. Reset clock. 9 69-1181 If you have any questions concerning this thermostat, call Honeywell Customer Assistance at 1-800-468-1502, Monday - Friday, 7:00 am - 5:30 pm, Central time. For service, contact your local heating and cooling contractor: 10 69-1181 11 69-1181 Home and Building Control Honeywell Inc. [. . . ]