OPERATION GUIDE 1F90W-51 5 Day/2 Day Electronic Digital Thermostat WHITE-RODGERS WHIT E-RO DGER S Operator: Save this booklet for future use!
About Your 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 thermostat. If you have questions, write to us at the address shown on the back cover of this manual.
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 .................................... 16 PLANNING FOR YOUR NEEDS ENTERING YOUR PROGRAM Set Current Time and Day Enter Heating Program Enter Cooling Program CHECK YOUR PROGRAMMING QUESTIONS AND ANSWERS .................
YOUR NEW THERMOSTAT’S FEATURES • Separate 5-day (weekday) and 2-day (weekend) 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.
OPERATING YOUR THERMOSTAT Before you begin programming your thermostat, 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 two parts: thermostat body and the subbase. The subbase is attached to the wall, but you can remove the thermostat body for easy programming.
these, then gently pivot the thermostat body down to connect the three pin connectors on the lower portion of the thermostat back. Gently push until the snap connectors engage. DO NOT FORCE OR PRY THE THERMOSTAT, as this may damage the unit. 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.
6-pin Connector Batteries W14 and , the buttons are Other than located behind the thermostat door. To open the door, pull the door out from the top, then swing it down on its hinges. On the following pages there are brief descriptions of the display and the thermostat buttons.
The Display 1 Continuously displays system mode (HEAT, OFF, COOL, HOLD). During programming, the program period is displayed (MOR, DAY, EVE, or NHT). 2 Alternately displays room temperature (F denotes degrees Fahrenheit and C denotes degrees Celsius) and time of day (A denotes AM time and P denotes PM time). 3 Displays the setpoint temperature. 4 5 DAY indicates that the displayed program is the weekday program. 2 DAY indicates that the displayed program is the weekend program.
5 DAY FAN AUTO SYSTEM HEAT-OFF-COOL FAN ON 1 2 DAY 4 - AUTO 2 FAN AUTO 6 TIME FWD SET CLOCK VIEW PRGM HOLD TEMP TIME BACK SET DAY RUN PRGM ADV PRGM 3 3 5 DAY 4 FAN ON 6 BATTERY 2 5 9
The Thermostat Buttons 12 Used to initiate or review thermostat programming. 7 Sets the system mode (HEATing, OFF, or COOLing). 13 Used to start program operation after programming. 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). 8 Selects fan operation (see #6, above). This button is also used to program the fan to run continuously during a program period.
17 16 5 DAY 18 FAN AUTO SYSTEM 7 HEAT-OFF-COOL 8 ON FAN - AUTO 9 TIME FWD SET CLOCK VIEW PRGM HOLD TEMP TIME BACK SET DAY RUN PRGM ADV PRGM 10 11 12 13 14 15 11
OPERATING FEATURES Now that you are familiar with the thermostat display and buttons, read the following information to learn about the many features of the thermostat. • COMPUTED ENERGY MANAGEMENT RECOVERY (EMR) — At installation, the thermostat can be set to automatically calculate the time it will take to change the temperature to the next program setting.
thermostat will automatically revert to the program. • 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 displayed. Then choose the desired hold or . temperature by pressing The thermostat will hold the room temperature at the selected setting until you press RUN PRGM to start program operation again.
! CAUTION cycles are too short, press A cooling anticipation setting of less than 10 may cause decreased compressor life. TIME FWD the cycle time. If the heat cycles are too long, press TIME BACK to decrease the cycle time. To set cooling anticipation, press To adjust heat anticipation, press and SET DAY SET CLOCK at the same time. The display will show HEAT 5 (this is the factory preprogrammed heating anticipation setting).
• COMPRESSOR SHORT CYCLE PROTECTION — To protect your compressor from potential damage due to rapid cycling, this thermostat has a built-in delay of 5 minutes between cooling cycles. The following may cause a time delay in COOL: a) Return of power after a power outage. b) Pressing SYSTEM HEAT-OFF-COOL to change operating modes. c) Pressing , creating a call for COOL too soon after a previous call. 15 PROGRAMMING thermostat and the thermostat is operating on battery power only.
PROGRAMMING YOUR THERMOSTAT Now you are ready to program your thermostat. This section will help you plan your thermostat's program to meet your needs. PROGRAMMING For maximum comfort and efficiency, keep the following guidelines in mind when planning your program. • When heating (cooling) your building, program the temperatures to be cooler (warmer) when the building is vacant or during periods of low activity. • During early morning hours, the need for cooling is usually minimal.
2a. What time do the building occupants reach a maximum activity level (using lights, equipment, meeting rooms, etc.)? b. What temperature should the building be at this time? These will be your DAY temperature 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 building become vacant? b.
8a. What time does the last person go to bed at night? b. What temperature should the house be at this time? These will be your NHT (night) temperature settings. Now look at the factory preprogrammed times and temperatures shown below. If this program will suit your needs, simply press RUN PRGM to begin running the factory preset program.
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 program time periods, and the temperatures you want during each period. You may also want to look at the sample program table to get an idea of how the thermostat can be programmed.
Heating/Cooling Schedule Plan WEEKDAY (5 DAY) Start Time MOR HEAT DAY HEAT EVE HEAT NHT HEAT MOR COOL DAY COOL EVE COOL NHT COOL 20 Temperature WEEKEND (2 DAY) Start Time Temperature
SAMPLE Heating/Cooling Schedule Plan WEEKDAY (5 DAY) WEEKEND (2 DAY) Start Time Temperature Start Time Temperature MOR HEAT 5:30 AM 68°F 7:00 AM 68°F DAY HEAT 8:00 AM 65°F 11:00 AM 70°F EVE HEAT 5:00 PM 70°F 6:00 PM 70°F NHT HEAT 10:30 PM 65°F 11:30 PM 65°F MOR COOL 6:30 AM 76°F 7:00 AM 76°F DAY COOL 2:00 PM 78°F 12:30 PM 74°F EVE COOL 5:00 PM 72°F 6:00 PM 72°F NHT COOL 10:30 PM 78°F 11:30 PM 78°F 21
2. Press and hold either TIME FWD or TIME BACK until you reach the correct minutes. 3. Press SET CLOCK once. The display window will 7. Press Enter Heating Program TIME FWD or TIME BACK until you reach the correct hour and AM/PM designation (AM begins at midnight; PM begins at noon). 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.
1. Press 2. Press SYSTEM HEAT-OFF-COOL VIEW PRGM until HEAT is displayed. once. 5 DAY (indicating week- day program), and MOR, representing the morning heating period, will appear in the display. Also displayed are the currently programmed start time for the MOR period and the currently programmed temperature. EXAMPLE: program, press TIME FWD TIME BACK or until your selected time appears. The time will change in 15 minute increments. or until you reach your 4.
9. After entering your weekday heating program, repeat steps 1 through 8 for your weekend programming (keep in mind that for weekend programming, the display should be changed from 5 DAY to 2 DAY). 10. When you have completed entering your heating program, press RUN PRGM . Enter Cooling Program ! CAUTION If outside temperature is below 50°F, we recommend that you remove the thermostat from the wall before proceeding with the following steps to program cooling temperatures.
1. Press SYSTEM until HEAT is displayed. HEAT-OFF-COOL 2. Press and hold VIEW PRGM to view the heating period times and temperatures in sequence for weekday, then weekend MOR, DAY, EVE, and NHT program periods. 3. Press RUN PRGM 4. Press SYSTEM YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATICALLY PROVIDE MAXIMUM COMFORT AND EFFICIENCY! Press SYSTEM HEAT-OFF-COOL until OFF is displayed. Reattach thermostat to subbase. Turn on power to the . system.
QUESTIONS AND ANSWERS 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 TIME FWD or TIME BACK and and to change the program. See PROGRAMMING YOUR THERMOSTAT. 2. How can I have no change in temperature from one time period to another? Simply select the same temperature for each consecutive time period.
start the normal program function. See PROGRAMMING 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 restored, the clock will reset itself to 12:00 PM (noon) and the thermostat will maintain a heating temperature of 64°F and a cooling temperature of 82°F until you reenter your program.
the thermostat immediately, press SYSTEM HEAT-OFF-COOL until OFF is displayed and replace the thermostat on the wall. Then press RUN PRGM to begin the factory preset program. Or you may reprogram the thermostat, then replace it on the wall. To prevent further static discharge problems, touch another object to release static build-up before touching the thermostat. See OPERATING YOUR THERMOSTAT. 6. The display is flashing BATTERY.
! CAUTION If the outside temperature is below 50°F, DO NOT use the button to move the temperature below the setpoint temperature. Property damage may result due to compressor slugging. 9. 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 function is operating.
continuously during this period. See PROGRAMMING 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 than letting the air dissipate. 11. Why is the system turning on and off so frequently (seldom)? The anticipation setting is too low (high). To change anticipation settings, see OPERATING YOUR THERMOSTAT. 30 12. Between heating and cooling seasons, I want to turn my system off.
13. 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 your clock, follow the instructions for setting current time and day. See ENTERING YOUR PROGRAM. Thermostat programming is not affected when you change the clock. after seeing a flashing BATTERY on the display, the installed batteries may be dead.
If you need further information on programming or operation, write to us at: White-Rodgers Division, Emerson Electric Co. 9797 Reavis Road St. Louis, MO 63123 Attn: Technical Service Department Part No.
