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Summary of Contents for White Rodgers 1F90-51
- Page 1 1F90-51 OPERATION GUIDE 5 Day/2 Day Electronic Digital Thermostat WHITE-RODGERS Operator: Save this booklet for future use!
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Page 2: About Your New Thermostat
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. - Page 3 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 In This Guide . . . PROGRAMMING YOUR THERMOSTAT ... 19 PLANNING FOR YOUR NEEDS ENTERING YOUR PROGRAM Set Current Time and Day Enter Heating Program...
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Page 4: Your New Thermostat's Features
YOUR NEW THERMOSTAT’S FEATURES • 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 •... -
Page 5: Operating Your Thermostat
OPERATING YOUR THERMOSTAT 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. -
Page 6: Parts Of The Thermostat
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). - Page 7 Other than , the buttons are Batteries 6-pin connector 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.
- Page 8 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 de- notes AM time and P denotes PM time).
- Page 9 5 DAY FAN AUTO DIGITAL COMFORT SET WHITE-RODGERS SYSTEM TIME SWITCH HEAT-OFF-COOL-AUTO TIME BACK SWITCH ON-AUTO 2 DAY FAN AUTO 5 DAY VIEW HOLD CLOCK PRGM TEMP PRGM PRGM FAN ON BATTERY...
- Page 10 The Thermostat Buttons 7 Sets the system mode (HEATing, OFF, or COOLing). 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 programming.
- Page 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. 5 DAY FAN AUTO DIGITAL COMFORT SET WHITE-RODGERS SYSTEM TIME CLOCK SWITCH HEAT-OFF-COOL-AUTO TIME BACK...
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Page 12: Operating Features
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 next program setting. - Page 13 • HOLD TEMPERATURE — The thermostat can hold any temperature within its range for an indefinite period, without reverting to the program. Press HOLD . HOLD will be dis- TEMP played. Then choose the desired hold tem- perature by pressing thermostat will hold the room temperature at the selected setting until you press start program operation again.
- Page 14 CAUTION A cooling anticipation setting of less than 10 may cause decreased compressor life. To adjust heat anticipation, press 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 mini- mum anticipation setting of 15 is recom-...
- Page 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).
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Page 16: Programming Your Thermostat
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. 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 or during peri- ods of low activity. - Page 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.
- Page 18 Now look at the factory preprogrammed times and temperatures shown below. If this program will suit your needs, simply press running the factory preset program. If you want to change the preprogrammed times and temperatures, do the following. Determine the time periods and heating and cooling temperatures for your weekday pro- gram.
- Page 19 Heating/Cooling Schedule Plan WEEKEND (2 DAY) WEEKDAY (5 DAY) Start Start Time Temperature Time Temperature MOR HEAT DAY HEAT EVE HEAT NHT HEAT MOR COOL DAY COOL EVE COOL NHT COOL...
- Page 20 MOR HEAT DAY HEAT EVE HEAT NHT HEAT MOR COOL DAY COOL EVE COOL NHT COOL SAMPLE Heating/Cooling Schedule Plan WEEKEND (2 DAY) WEEKDAY (5 DAY) Start Start Time Temperature Time 5:30 AM 68 F 7:00 AM 8:00 AM 65 F 11:00 AM 5:00 PM 70 F...
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Page 21: Entering Your Program
ENTERING YOUR PROGRAM Follow these steps to enter the heating and cooling programs you have selected. NOTE 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. - Page 22 5. Press 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 reach the current day of the week. 7. Press once. The display will show the PRGM correct time and room temperature alter- nately.
- Page 23 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 TIME program, press lected time appears. The time will change in 15 minute increments.
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Page 24: Check Your Programming
Enter Cooling Program CAUTION 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. - Page 25 SYSTEM 4. Press until COOL is displayed. SWITCH 5. Repeat step 2 to check cooling tempera- tures. 6. Press to begin program operation. PRGM YOUR THERMOSTAT IS NOW COMPLETELY PROGRAMMED AND READY TO AUTOMATI- CALLY PROVIDE MAXIMUM COMFORT AND EFFICIENCY! SYSTEM Press until OFF is displayed.
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Page 26: Questions And Answers
QUESTIONS AND ANSWERS 1. How can I permanently change a part of my program? VIEW Press until you reach the time/tempera- PRGM ture schedule you want. Then press TIME BACK 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 consecutive time period. - Page 27 programming at this point, press 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.
- Page 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 until OFF is displayed and replace the ther- mostat on the wall. Then press the factory preset program. Or you may reprogram the thermostat, then replace it on the wall.
- Page 29 use the button to move the tempera- ture below the setpoint temperature. See OPERATING YOUR THERMOSTAT. CAUTION 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.
- Page 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 than letting the air dissipate.
- Page 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 24 VAC source.
- Page 32 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 Part No. 37-5099B Replaces 37-5099A 9532...