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White Rodgers 1F91-71 - page 1
OPERA TION GUIDE Multi-stage Electronic Digital Thermostat 1F91-71 WHITE-RODGERS Operator: Save this booklet for future use! ...
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2 Please read this manual thoroughly before operating or programming your thermostat. If you have questions, you may write to our Technical Service Department at the address shown on the back cover of this booklet. About Y our New Thermostat . . . Your new Digital COMFORT SET II Multi-stage Thermostat uses the technology of a solid-state microcompu ...
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3 In This Guide . . . YOUR NEW THERMOSTAT’S FEATURES ........................................... 4 OPERATING YOUR THERMOSTAT ........ 5 PARTS OF THE THERMOSTAT The Back Of the Thermostat Body The Display The Thermostat Buttons OPERATING FEATURES PROGRAMMING YOUR THERMOSTAT ................................... 17 PLANNING FOR YOUR NEEDS ENTERING YO ...
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4 • Computed Energy Management Recovery (EMR) • Automatic changeover (operator selectable) • Five-day/two-day programming capability • Simultaneous heat and cool program stor- age • Preprogrammed temperature control • Four separate time and temperature set- tings per 24-hour period • Armchair programming capability • Audio and visua ...
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5 Before you begin programming your new ther- mostat, you should be familiar with its fea- tures and with the display and the location and operation of the thermostat buttons. The in- formation in this section will help you become familiar with your thermostat so that you can easily program it. Your thermostat consists of two parts: the ther- mosta ...
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6 If the word BAT is flashing in the display window, the battery is low and should be replaced with a fresh 9 volt Energizer ® alkaline battery. The battery will provide power for all functions except the display PARTS OF THE THERMOSTAT The Back of the Thermostat Body Turn the thermostat body over. On the back are the 9 volt Energizer ® alkaline ...
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7 light and audio prompting, which work only on 24 VAC power. If the word BAT is dis- played continuously (non-flashing), the ther- mostat is not being supplied with 24 VAC power and is being powered by the battery alone. Use SYSTEM SWITCH to turn thermostat OFF be- fore removing thermostat from the wall to replace the battery. 2. You may adjust op ...
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8 Other than and , the buttons are located behind the thermostat door. To open the door, use your fingernail in the indentation at the top center of the door. Pull the door out, then swing the door down on its hinges. Following are brief descriptions of the display and the thermostat buttons. The Display 1 Continuously displays system mode ( HEAT , ...
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9 SYSTEM SWITCH FAN SWITCH HEAT/OFF/COOL/AUTO TIME FWD TIME BACK SET CLOCK SET DAY VIEW PRGM RUN PRGM HOLD TEMP ADV PRGM DIGITAL MULTI-STAGE COMFORT-SET II W H I T E - R O D G E R S 1 2 3 4 6 6 2 DAY 5 DAY 2 3 5 4 FAN FAN BAT ON /AUTO 5 DAY FAN ...
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10 The Thermostat Buttons 7 Sets the system mode ( HEAT ing, OFF , COOL ing, or AUTO matic changeover [user selectable feature]). 8 Selects fan operation (see #6, above). This button is also used to program the fan to run continuously during a program period. 9 Runs display forward or backward through time, day, or anticipation settings during prog ...
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11 18 The red light is on when the 1st stage heating/cooling system is operating. The yellow light is on when the 2nd or 3rd stage heating/cooling system is operating. SYSTEM SWITCH FAN SWITCH TIME FWD TIME BACK SET CLOCK SET DAY VIEW PRGM RUN PRGM HOLD TEMP ADV PRGM II W H I T E - R O D G E R S 10 11 12 13 14 15 16 17 18 9 7 8 HEAT/OFF/COOL/AUTO D ...
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12 OPERATING FEATURES Now that you are familiar with the thermostat display and buttons, read the following informa- tion to learn about the many features of the thermostat. • COMPUTED ENERGY MANAGEMENT RECOVERY (EMR) - The thermostat’s mi- crocomputer automatically calculates the time it will take to change the temperature to the next program ...
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13 Automatic Changeover (ON) Switch #1 set at installation ( DO NOT CHANGE ) Switch #2 set at installation ( DO NOT CHANGE ) Switch #3 set at installation ( DO NOT CHANGE ) Switch #4 ON In the AUTO mode, the thermostat will not allow the temperature separation between the high- est heat setting and the lowest cool setting to be less than 1 ° F. Fo ...
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14 • TWO HOUR TEMPERATURE OVER- RIDE — Press or until the display shows the temperature you want. The thermostat will override current pro- gramming and keep the room temperature at the selected temperature for two hours. After two hours, the thermostat will auto- matically revert to the program. • HOLD TEMPERATURE — The thermostat can hold ...
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White Rodgers 1F91-71 - page 15
15 too often (short cycles) or not often enough (long cycles), you may want to adjust the anticipation setting. A cooling anticipation setting of less than 10 may cause decreased com- pressor life. To adjust anticipation, press SET CLOCK and SET DAY at the same time. The display will show HEAT 8 (this is the factory preprogrammed heating anticipati ...
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16 • AUDIO PROMPTING — Each time you press a button, the thermostat will beep. • BACKLIT DISPLAY — When you press any button on the thermostat, the display is lit for approximately eight seconds (this feature works only when the thermostat is attached to the wall and 24 VAC power is present to the thermostat). • COMPRESSOR SHORT CYCLE PRO ...
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White Rodgers 1F91-71 - page 17
17 FAN is displayed. To override constant fan, press FAN SWITCH until FAN is dis- played. PROGRAMMING YOUR THERMOST A T Now you are ready to program your thermostat. This section will help you plan and program your thermostat to meet your needs. For maximum comfort and efficiency, keep the following guidelines in mind when planning your program. ? ...
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18 First, you should answer the following ques- tions to help you decide what your needs are. If you are using the thermostat for a commercial application (a store, office building, etc.), an- swer questions 1 through 4. If you are using the thermostat in your home, answer questions 5 through 8. Keep in mind that you should plan for both weekday an ...
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19 b. What temperature should the house be at this time? These will be your MOR (morn- ing) temperature settings. 6a. What time does the last person leave the house in the morning? b. What temperature should the house be at this time? These will be your DAY tempera- ture settings. 7a. What time does the first person arrive home in the evening? b. W ...
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20 Determine the time periods and heating and cooling temperatures for your weekday pro- gram. You must program 4 periods for each day ( MOR , DAY , EVE , and NHT ). However, you may use the same heating and cooling tem- peratures for consecutive time periods. You can choose start times, heating temperatures, and cooling temperatures independently ...
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21 WEEKDAY (5 DAY) WEEKEND (2 DAY) Start Time Temperature Start Time Temperature MOR HEAT DAY HEAT EVE HEAT NHT HEAT MOR COOL DAY COOL EVE COOL NHT COOL Heating/Cooling Schedule Plan ...
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22 WEEKDAY (5 DAY) WEEKEND (2 DAY) Start Time Temperature Start Time Temperature MOR HEAT DAY HEAT EVE HEAT NHT HEAT MOR COOL DAY COOL EVE COOL NHT COOL SAMPLE Heating/Cooling Schedule Plan 5:30 AM 8:00 AM 4:30 PM 11:00 PM 8:00 AM 12:00 PM 4:30 PM 11:00 PM 7:30 AM 2:00 PM 6:00 PM 12:00 AM 8:00 AM 2:00 PM 6:00 PM 12:00 AM 68 ° 66 ° 70 ° 66 ° 76 ...
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23 ENTERING YOUR PROGRAM Follow these steps to enter the heating and cooling programs you have selected. We recommend that you remove the thermo- stat from the wall for programming (especially for entering cooling programming). A fresh 9 volt Energizer ® alkaline battery must be in- stalled to perform off-wall programming. BE SURE SYSTEM SWITCH IS ...
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White Rodgers 1F91-71 - page 24
24 5. Press SET DAY once. The display will show the day of the week as an abbreviation ( MO for Monday, TU for Tuesday, etc.). 6. Press and hold either TIME FWD or TIME BACK until you reach the current day of the week. 7. Press RUN PRGM once. The display will show the correct time and room temperature alter- nately. Enter Heating Program During pro ...
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25 This display window shows that for the weekday MOR period, the start time is 5:00 AM, and 70 ° is the programmed tempera- ture (this example reflects factory prepro- gramming). 3. To change the displayed start time to your selected start time for weekday MOR heat program, press TIME FWD or TIME BACK until your se- lected time appears. The time ...
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White Rodgers 1F91-71 - page 26
26 Enter Cooling Program If outside temperature is below 50 ° F, we recommend that you remove the ther- mostat from the wall before proceeding with the following steps to program cool- ing temperatures. Personal injury or property damage may occur due to air conditioner compressor slugging. A fresh 9 volt Energizer ® alkaline battery must be inst ...
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White Rodgers 1F91-71 - page 27
27 3. Press RUN PRGM . 4. Press SYSTEM SWITCH until COOL is displayed. 5. Repeat step 2 to check cooling tempera- tures. 6. Press RUN PRGM to begin program operation. YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATI- CALLY PROVIDE MAXIMUM COMFORT AND EFFICIENCY! Press SYSTEM SWITCH until OFF is displayed. Reattach thermostat to su ...
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28 1. How can I permanently change a part of my program? Press VIEW PRGM until you reach the time/tem- perature schedule you want. Then press or and TIME FWD and TIME BACK to change the program. See PROGRAMMING YOUR THERMOSTAT . 2. How can I have no change in tempera- ture from one time period to another? Simply select the same temperature for each ...
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29 programming at this point, press RUN PRGM to start the normal program function. See PRO- GRAMMING YOUR THERMOSTAT . 4. What happens if the electricity goes off or is manually shut off? If you have not installed a 9 volt alkaline battery, the display will go blank and the program will be lost in approximately one minute. When electricity is resto ...
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White Rodgers 1F91-71 - page 30
30 the wall and disconnect the battery. Wait about one minute, then reconnect the bat- tery. The thermostat will revert to the fac- tory preset program until you reprogram the thermostat. If you don’t want to reprogram the thermostat immediately, press SYSTEM SWITCH until OFF is displayed and replace the ther- mostat on the wall. Then press RUN P ...
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31 8. Why doesn’t the display light come on when I press a button? Why don’t I hear a beep when I press a button? The display light and audio prompting (beep) only work when the thermostat is on the wall and 24 VAC power is present to the ther- mostat. These features will not work on battery power alone. See OPERATING YOUR THERMOSTAT . 9. The d ...
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32 If the outside temperature is below 50 ° F, DO NOT use the button to move the temperature below the setpoint tem- perature. Property damage may result due to compressor slugging. 11. Why doesn’t the temperature change at the time I programmed? There may be a number of causes for this situation. The following are primary reasons. • The EMR f ...
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White Rodgers 1F91-71 - page 33
33 12. Why does the blower fan keep running after the system has turned off? • You have programmed the fan to run continuously during this period. See PROGRAMMING YOUR THERMO- STAT . • The blower delay feature is operating. This energy saving feature continues to blow conditioned air through the ducts after the system has turned off, rather tha ...
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34 15. I live in an area where daylight savings time is observed. How do I change the thermostat clock twice a year without affecting thermostat programming? To change the clock, follow the instructions for setting current time and day (see EN- TERING YOUR PROGRAM ). Thermostat programming is not affected when you change the clock. 16. Do I have to ...
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White Rodgers 1F91-71 - page 35
35 If the thermostat maintains programming, press SYSTEM SWITCH until OFF is displayed, put the thermostat back on the wall, press SYSTEM SWITCH again to select the operating mode you want, then press RUN PRGM to start program operation. If the program is lost, reprogram the thermostat. See PROGRAMMING YOUR THERMOSTAT . ...
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If you need further information on programming or operation, you may write to our Technical Service Department at the address shown below. Part No. 37-4739C Replaces 37-4739B 9606 WHITE-RODGERS DIVISION EMERSON ELECTRIC CO. 9797 REAVIS ROAD ST. LOUIS, MISSOURI 63123-5398 ...
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