Programmable Load Controller USER’S GUIDE TM Honeywell Scientific Atlanta Weekday/Weekend (5-day/Saturday/ Sunday) Programmable Heat and/or Cool Conventional and Heat Pump T7512A,B,C 1 69-0989-1 69-0989—1
Welcome to the world of comfort and energy savings with your new Scientific Atlanta/ Honeywell SuperStat thermostat. to take advantage of special programs you can subscribe to that can increase your energy savings further. This thermostat allows full weekday/weekend programming so that you can set the thermostat to control the temperature in your home according to your personal schedule and preferences.
word SAVING is displayed on the thermostat. See Fig. 2. You must subscribe to these programs before your utility company can communicate with your thermostat. If you have any questions concerning the application of this thermostat or these special programs and features, please contact your local utility. during the cooling season and a lower temperature during the heating season. AM COOL AUTO HR TUE 1 INDICATOR FOR TIME-OF USE PRICING 2 3 4 M7904 AM Fig. 1. Time-of-Use Pricing indicator.
Table of Contents Recovery From Setback ................................................................................................................. Programming Your Thermostat ....................................................................................................... Personal Programming Charts ........................................................................................................ Step 1—Set the Current Time/Day .............................................................
and begin warming the house to 72°F. If you want the temperature in the house to be 72°F at 6:00 AM, you should program the thermostat to an earlier time; for example, 5:30. (The exact amount of time it takes your home to warm or cool to the temperature you want depends on many factors such as the size of your heating/ cooling equipment and the outdoor temperature.
Programming Charts. There are four time periods available for weekdays, Saturday, and Sunday—WAKE, LEAVE, RETURN, and SLEEP. These periods can be displayed individually on the thermostat as you press the WEEKDAY SCHEDULE or WEEKEND SCHEDULE keys. You may want to enter a different schedule for both the cooling and heating seasons. PROGRAMMING YOUR THERMOSTAT IMPORTANT Batteries must be installed to maintain time and date in the event of power loss.
LEAVE is the time you leave for work or school. Generally, once you leave the house, you want the temperature higher or lower (depending on the season) so that you can save energy while you are away. RETURN is the time you return from work or school. Once again, you want the house at a comfortable temperature when you return and go about the normal activities of your day before bedtime.
Personal Programming Charts You do not need to enter a time and temperature program for every period if your schedule does not require it. For example, if your house is occupied during the day on weekdays, you can program only the WAKE and SLEEP times. Cooling Schedule (for Summer Use): Time Cooling Temperature Weekday WAKE LEAVE RETURN SLEEP Saturday WAKE LEAVE RETURN SLEEP Sunday WAKE LEAVE RETURN SLEEP NOTE: Temperatures cannot be set any higher than 88°F or any lower than 45°F.
Heating Schedule (for Winter Use): If you subscribe to Time-of-Use Pricing, use the following table to plan the offsets you will enter for each Time-of-Use Pricing rate. You should enter different offsets for the heating and cooling seasons. You do not need to enter an offset for rate 1.
Before programming the thermostat, remove the clear plastic overlay that covers the display. When pressing the keys, use the ball of your finger or a soft pencil eraser; using sharp fingernails or pencil points can damage the keypad. If you make a mistake during programming, press the RUN PROGRAM key and reprogram the time, temperature, or offset with the error. BACK keys until the current day is displayed. After you have set the time and day, press the RUN PROGRAM key.
Press the AHEAD or BACK keys to set the weekday WAKE time from your Personal Programming Charts. Press the WARMER or COOLER keys to set the weekday WAKE temperature from your Personal Programming Charts. Press the WEEKEND SCHEDULE key again so that SUN, WAKE and SET appear on the display. Set the WAKE, LEAVE, RETURN and SLEEP schedules for Sunday just as you did for the weekdays and Saturday. Repeat the above sequence for the other weekday schedules: LEAVE, RETURN, and SLEEP.
normal operation to change so you can save money at each rate. For example, if you normally want your home heated to 72° when rate 1 is in effect, but are willing to let your home cool to 70° when rate 2 is in effect, your heating offset for rate 2 is -2 (72° -2° = 70°). If you do not enter an offset, the offset is 0°. The first time you press the OFFSET key, the offset for rate 1 is displayed (note the indicator on the thermostat display as shown in Fig. 1).
Step 3—Set the System and Fan Controls The status of the system is as follows when the associated indicator is displayed: After programming the thermostat, set the system and fan controls as follows: HEAT: System Control If you have a conventional heating/cooling system, the system can be set to: HEAT, COOL or OFF. If you have a heat pump system, the system can be set to: HEAT, EM. HEAT, COOL or OFF.
No status Both the heating and air conditioning displayed: systems are off (heat pump off). Fan Control There are two fan settings: AUTO and ON. Set the fan at the setting you want by pressing the FAN key. Each time you press the key, the fan status changes to the next setting. When FAN is displayed, the fan is on continuously. Use this setting for improved air circulation during special occasions or for more efficient electronic air cleaning.
OPERATING YOUR THERMOSTAT temporary setting stays in effect only until the next scheduled program change. (If you subscribe to Time-of-Use Pricing, it stays in effect only until the next rate change takes effect.) To cancel the temperature change, press the RUN PROGRAM key. When a temporary temperature is in effect, the display alternates between the time/temperature and the temporary setting.
press the RUN PROGRAM key or the PRESENT SETTING key. Cancel a Program You can cancel a program by pressing the WEEKDAY or WEEKEND key until the program you want to cancel is displayed; then press the CLEAR key. Check the Current Temperature Setting To check the current (programmed) temperature setting, press the PRESENT SETTING key. NOTE: You cannot cancel the WEEKDAY WAKE program. Check the Programs You Entered Press the WEEKDAY SCHEDULE or WEEKEND SCHEDULE key.
subscribe to Time-of-Use Pricing, the thermostat records usage for each rate. The first time you press the USAGE key, the thermostat displays the current usage value for rate 1. Each time you press the USAGE key again, usage values for rates 2, 3 and 4 are then displayed. If you continue to press the USAGE key, accumulated usage values are displayed for rates 1 through 4. To view heating or cooling equipment usage, press the SYSTEM key to display HEAT or COOL, then press the USAGE key.
your utility can also clear the accumulators by sending a message to the thermostat. pressing the RUN PROGRAM key will cancel your change. Permanently Change a Program Change Fan or System Control Settings To permanently change a program, repeat the appropriate steps in Programming Your Thermostat. Change the fan setting by pressing the FAN key. Each time you press the key, the fan status changes to the next setting. When FAN is displayed, the fan is on continuously.
cooling system can operate is controlled by radio signal from your utility company. If you notice the temperature in your home is higher or lower than the setting you programmed into the thermostat, check the thermostat display. To indicate the equipment is under Direct Load Control, the thermostat displays the word SAVING. You cannot control the heating/cooling equipment when it is under Direct Load Control.
Load Control on-line effectively, your thermostat automatically calculates and initiates a time delay before the heating or cooling equipment comes on. You cannot override this time delay. change will be occurring, the Time-of-Use indicator on the thermostat begins blinking onehalf hour before the rate change takes effect. When a rate change message is received by the thermostat, your heating/cooling system automatically operates at the temperature and offset you programmed.
As the batteries run low, the display shows bAt Lo. This low battery indication flashes for one to two months before the batteries run out completely. Replace the batteries as soon as possible after the indicator starts flashing. REPLACING THE THERMOSTAT BATTERIES IMPORTANT Batteries must be installed to maintain the time and date in the event of a power loss.
• Install the fresh batteries as shown. Make sure positive and negative terminals are oriented correctly. • Replace the battery door.
TROUBLESHOOTING GUIDE IF... Display will not come on. THEN… • There is no power applied to the thermostat. Check fuse or circuit breaker. Temperature display will not go lower than 45°F or higher than 88°F during programming. • You have reached the temperature setting limit. The setting range is 45°F to 88°F. Temperature change occurs at the wrong times. • Check the program times for the period in question. Be sure that AM and PM indications are correct. Make sure the current day and time are correct.
Heating will not come on. • Check that the system control on the thermostat is set to HEAT. • Check the display. If SAVING is displayed, you are in Direct Load Control mode and your thermostat is under control of the utility. Heating may not come on until Direct Load Control period ends. • If the temperature setting is higher than current temperature, and the display says HEAT, contact your utility company. Cooling will not come on. • Check that the system control on the thermostat is set to COOL.
• Check the display. If SAVING is displayed, you are in Direct Load Control mode and your thermostat is under control of the utility. Cooling may not come on until the Direct Load Control period ends. • The thermostat has a built-in time delay on cooling. Allow five to ten minutes after changing the setting before the air conditioner starts to prevent equipment damage.
The house is too warm or too cool. • Press PRESENT SETTING key to check the current temp erature setting. • If desired, change the temperature setting. See Operating Your Thermostat section. • If you subscribe to Real-time Pricing, you may need to adjust your offset temperatures to provide a more comfortable temperature. • Check the display. If SAVING is displayed, you are in Direct Load Control mode and your thermostat is under control of the utility.
The thermostat’s current setting does not match the display temperature. • Be aware that it is normal for the current setting and display temperature to differ on occasion. • During recovery from setback or setup, setting and display temperatures may differ to within ±1° for up to 30 minutes after the recovery period. Incorrect room temperature showing on thermostat display. • The thermostat is factory-calibrated, and cannot be adjusted. Thermostat is flashing CALL .
TYPICAL ENERGY SAVINGS PERCENTAGE OF HEATING ENERGY YOU CAN SAVE o ONE 10 F ENERGY SAVINGS PERIOD* o 70 TO 60oF; 8 HRS/DAY 9% TO 11% 12% TO 13% 14% TO 15% DODGE CITY, KS CHICAGO, IL 12% - 23% NEW YORK, NY 11% - 21% 12% - 23% BILLINGS, MT MPLS.
PERCENTAGE OF COOLING ENERGY YOU CAN SAVE o ONE 5 F ENERGY SAVINGS PERIOD* o 75 TO 80oF; 8 HRS/DAY 7% TO 9% 10% TO 11% 12% TO 14% DODGE CITY, KS CHICAGO, IL NEW YORK, NY 9% - 15% 13% - 20% 13% - 20% BILLINGS, MT MPLS.
Toll-free Customer Assistance For all questions concerning this thermostat, please read and follow the instructions. If additional assistance is needed, call your utility’s Customer Assistance number. Before you call, please have the following information available—thermostat model number and date code, type of heating/cooling system (hot water, warm air, oil, gas, heat pump, etc).
WARRANTY CONDITIONS 31 69-0989—1
TM Honeywell Scientific Atlanta 32 Printed in U.S.A 69-0989—1 J.S.
