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White Rodgers 1F90-51 manual

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  • Page 1

    OPERA TION GUIDE 5 Day/2 Day Electronic Digital Thermostat 1F90-51 WHITE-RODGERS Operator: Save this booklet for future use![...]

  • Page 2

    2 About Y our New Thermostat . . . Your new White-Rodgers Digital Thermostat uses the technology of a solid-state microcomputer to provide precise time/temperature control. This thermostat offers you the flexibility to design heating and cooling programs that fit your needs. Please read this manual thoroughly before operating or programming your th[...]

  • Page 3

    3 Operator: Save this booklet for future use! PROGRAMMING YOUR THERMOSTAT .................................... 19 PLANNING FOR YOUR NEEDS ENTERING YOUR PROGRAM Set Current Time and Day Enter Heating Program Enter Cooling Program CHECK YOUR PROGRAMMING QUESTIONS AND ANSWERS ................. 29 YOUR NEW THERMOSTAT’S FEATURES ......................[...]

  • Page 4

    4 • Separate 5-day (weekday) and 2-day (week- end) setback programming • Simultaneous heat and cool program storage • Four separate time/temperature settings per 24-hour period • Computed Energy Management Recovery (EMR) • Armchair programming capability • Backlit LCD displays continuous set point, time, and room temperature • 1.5 vol[...]

  • Page 5

    5 OPERA TING YOUR THERMOST A T Before you begin programming your thermo- stat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. The information in this section will help you become familiar with your new thermostat so that you can easily program it. Your thermostat consists of t[...]

  • Page 6

    6 PARTS OF THE THERMOSTAT The Back of The Thermostat Body Turn the thermostat body over. On the back are the 3 “AA” Energizer ® alkaline batteries. The “AA” Energizer ® alkaline batteries provide power to the thermostat when the 24 VAC power is interrupted (for example, when you remove the thermostat from the wall for programming). Fresh [...]

  • Page 7

    7 Other than and , the buttons are located behind the thermostat door. To open the door, put your fingernail in the indentation at the top of the door, then pull the door out from the top and swing it down on its hinges. On the following pages there are brief descrip- tions of the display and the thermostat buttons. BACK OF THERMOSTAT BODY 2-pin co[...]

  • Page 8

    8 5 The word BATTERY flashes on the display when the “AA” alkaline batteries are weak and should be replaced. The word BAT- TERY is displayed continuously (non-flash- ing) when thermostat is running on battery power only. 6 FAN ON is displayed when the blower is operating continuously. FAN AUTO is dis- played during automatic fan operation (whe[...]

  • Page 9

    9 1 3 2 4 SYSTEM SWITCH FAN SWITCH HEAT-OFF-COOL-AUTO TIME FWD TIME BACK SET CLOCK SET DAY VIEW PRGM RUN PRGM HOLD TEMP ADV PRGM 2 DAY 5 DAY FAN AUTO FAN ON ON-AUTO 5 DAY FAN AUTO BATTERY WHITE-RODGERS DIGITAL COMFORT SET II 4 3 6 6 2 5[...]

  • Page 10

    10 12 Used to initiate or review thermostat pro- gramming. 13 Used to start program operation after pro- gramming. Also used to return thermostat to program operation after being in HOLD mode. 14 Used to manually override programming to hold at a selected temperature (when HOLD is displayed). 15 Used to advance thermostat program to the next progra[...]

  • Page 11

    11 17 (Blue arrow) Lowers temperature set- ting (40 ° F or 4 ° C minimum). 18 The red indicator light glows whenever heat- ing, cooling, or fan are in operation. 17 9 10 11 12 13 14 15 8 7 SYSTEM SWITCH FAN SWITCH TIME FWD TIME BACK SET CLOCK SET DAY VIEW PRGM RUN PRGM HOLD TEMP ADV PRGM 16 18 HEAT-OFF-COOL-AUTO ON-AUTO 5 DAY FAN AUTO WHITE-RODGE[...]

  • Page 12

    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 microcomputer can be set to automatically calculate the time it will take to change the temperature to the [...]

  • Page 13

    13 • HOLD TEMPERATURE — The thermostat can hold any temperature within its range for an indefinite period, without reverting to the program. Press HOLD TEMP . HOLD will be dis- played. Then choose the desired hold tem- perature by pressing or . The thermostat will hold the room temperature at the selected setting until you press RUN PRGM to sta[...]

  • Page 14

    14 A cooling anticipation setting of less than 10 may cause decreased compressor life. To adjust heat anticipation, press SET CLOCK and SET DAY at the same time. The display will show HEAT 5 (this is the factory preprogrammed heating anticipation setting). You may se- lect any anticipation setting from 2 to 40 ( note that for hydronic systems, a mi[...]

  • Page 15

    15 • 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. • SYSTEM INDICATOR LIGHT — The red light on the upper right part of the thermostat indicates system operation (see PARTS OF THE THERMOSTAT ). [...]

  • Page 16

    16 Now you are ready to program your thermostat. This section will help you plan your thermostat’s program to meet your needs. For maximum comfort and efficiency, keep the following guidelines in mind when planning your program. • When heating (cooling) your building, pro- gram the temperatures to be cooler (warmer) when the building is vacant [...]

  • Page 17

    17 b. What temperature should the building be at this time? These will be your DAY tempera- ture settings. 3a. What time do the building occupants reach a minimum activity level (limited personnel in building)? b. What temperature should the building be at this time? These will be your EVE (evening) temperature settings. 4a. What time does the buil[...]

  • Page 18

    18 choose start times, heating temperatures, and cooling temperatures independently for both weekday and weekend programs (for example, you may select 5:00 AM and 70 ° as the weekday MOR heating start time and temperature, and choose 7:00 AM and 76 ° as the weekday MOR cooling start time and temperature). Use the following table to plan your prog[...]

  • Page 19

    19 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[...]

  • Page 20

    20 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 5:00 PM 10:30 PM 6:30 AM 2:00 PM 5:00 PM 10:30 PM 7:00 AM 11:00 AM 6:00 PM 11:30 PM 7:00 AM 12:30 PM 6:00 PM 11:30 PM 68 ° F 70 ° F 70 ° F 65[...]

  • Page 21

    21 ENTERING YOUR PROGRAM Follow these steps to enter the heating and cooling programs you have selected. We recommend that you remove the thermostat from the wall for programming (especially for entering cooling programming). Fresh “AA” En- ergizer ® alkaline batteries must be installed to perform off-wall programming. BE SURE TO USE SYSTEM SW[...]

  • Page 22

    22 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[...]

  • Page 23

    23 7. Repeat steps 3 through 5 to select the start time and heating temperature for the week- day DAY program. 8. Repeat steps 3 through 7 for the weekday EVE and NHT heating programs. 9. After entering your weekday heating pro- gram, repeat steps 1 through 8 for your weekend programming (keep in mind that for weekend programming, the display shoul[...]

  • Page 24

    24 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. Fresh “AA” Energizer ® alkaline batteries must be in[...]

  • Page 25

    25 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 subbase. Turn on power[...]

  • Page 26

    26 QUESTIONS AND ANSWERS 1. How can I permanently change a part of my program? Press VIEW PRGM until you reach the time/tempera- ture schedule you want. Then press TIME FWD or TIME BACK and and 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 sam[...]

  • Page 27

    27 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 3 “AA” alkaline batteries, the display will go blank and the program will be lost in approximately one minute. When electricity is r[...]

  • Page 28

    28 tery. The thermostat will revert to the factory 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 PRGM to begin the factory preset program. Or you may reprogram the thermostat, then rep[...]

  • Page 29

    29 use the button to move the tempera- ture below the setpoint temperature. See OPERATING YOUR THERMOSTAT . If the outside temperature is below 50 ° F, DO NOT use the button to move the temperature below the setpoint tempera- ture. Property damage may result due to compressor slugging. 9. Why doesn’t the temperature change at the time I programm[...]

  • Page 30

    30 10. 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 PRO- GRAMMING YOUR THERMOSTAT . • 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[...]

  • Page 31

    31 To change your clock, follow the instruc- tions for setting current time and day. See ENTERING YOUR PROGRAM . Thermo- stat programming is not affected when you change the clock. 14. Do I have to reprogram my thermostat after I change the batteries? When the thermostat is on the wall and the system has power, the thermostat is being powered by a [...]

  • Page 32

    Part No. 37-5099B Replaces 37-5099A 9532 If you need further information on programming or operation, write to: White-Rodgers Division, Emerson Electric Co. 9797 Reavis Road St. Louis, MO 63123-5398 Attn: Technical Service Department R[...]