Programmable Commercial Load Management Thermostat Weekday/Weekend (5-day/Saturday/Sunday) Programmable T7518A,D USER’S GUIDE 69-1623
Welcome to the world of comfort and energy savings with your new Honeywell Programmable Load Management Thermostat. advantage of special programs you can subscribe to that can further increase your energy savings. This thermostat allows full weekday/weekend programming so you can set the thermostat to control the temperature in your home according to your personal schedule and preferences.
ling your home at a higher temperature during the cooling season and a lower temperature during the heating season. under DLC, the 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.
Table Of Contents Recovery From Setback ........................................................................................................ Programming Your Thermostat .............................................................................................. Programming Charts .............................................................................................................. Step 1—Set the Current Time/Day ..................................................................................
RECOVERY FROM SETBACK The term recovery refers to the process the thermostat uses to operate the heating or cooling equipment to transition from the energy savings setting you selected for when you are away to the temperature you prefer when you are present. AM and begin warming to 72°F. If you want the temperature to be 72°F at 6:00 AM, you should program the thermostat to an earlier time; for example, 5:30.
the T7518A,D Thermostats. 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 the cooling and the heating seasons. PROGRAMMING YOUR THERMOSTAT IMPORTANT Batteries must be installed to maintain time and date in the event of power loss.
NOTE: Temperatures cannot be set any higher than 88°F or any lower than 45°F.
If you make a mistake during programming, press the Run Program key and reprogram the time, temperature, or offset value with the error. If you subscribe to Time-of-Use Pricing, use the following table to plan the offset values you will enter for each Time-of-Use Pricing rate, use a numerical value as described in Enter Offset Values. You should enter a different offset value for the heating and cooling seasons, see chart. You do not need to enter an offset for rate 1.
Repeat the above sequence for the UNOCCUPIED weekday schedules. Press the Weekend Schedule key until SAT, OCCUPIED and SET appear on the display. Set the UNOCCUPIED schedule for Saturday just as you did for the weekdays. Press the Weekend Schedule key again so that SUN, OCCUPIED and UNOCCUPIED and SET appear on the display. Set the OCCUPIED and UNOCCUPIED schedules for Sunday just as you did for the weekdays and Saturday.
the offset for rate 1 is displayed (note the indicator on the thermostat display as shown in Fig. 1). Use the Warmer and Cooler keys to set the offset value. Repeat the procedure for each rate. After you have entered the last offset value, press the Run Program key. Enter Offset Values Enter the offset value for each Time-of-Use Pricing rate using the Offset key. You can enter offset numbers only if you are a subscriber to Time-of-Use Pricing.
Step 3—Set the System and Fan Controls After programming the thermostat, set the system and fan controls as follows: System Control The system can be set to: HEAT, COOL or OFF. You can change the system setting by pressing the System key. Each time you press the key, the system status changes to the next setting. COOL: The thermostat will control your air conditioning system according to the schedule you programmed (heat pump in cooling mode).
When nothing is displayed, the fan is in AUTO mode (it comes on with the heating or cooling equipment, as needed). AUTO is the normal setting and allows a single-speed fan to turn on automatically with the air conditioner or furnace. If you have a two-speed fan, it usually runs on high with the air conditioner and on low with the furnace.
subscribe to Time-of-Use Pricing, it stays in effect only until the next rate change.) 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. Check the Programs You Entered Press the Weekday Schedule or Weekend Schedule key. Each time you press the key, the next program schedule is displayed.
rate 1. Each time you press the Usage key again, usage values for rates 2, 3 and 4 , respectively, are then incrementally displayed. If you continue to press the Usage key, accumulated usage values are repeated 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. Each time you press the Usage key, the thermostat displays the next usage value.
Permanently Change a Program To permanently change a program, repeat the appropriate steps in Programming Your Thermostat. Change Fan or System Control Settings 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. When nothing is displayed, the fan is in AUTO mode (it comes on with the heating or cooling equipment, as needed).
temperature is higher or lower than the setting you programmed into the thermostat, check the thermostat display. To indicate the equipment is under DLC, the thermostat displays the word SAVING. You cannot control the heating/ cooling equipment when it is under DLC. THERMOSTAT OPERATION WHEN SPECIAL PROGRAMS ARE IN EFFECT Normally your thermostat operates as you programmed it. If you subscribe to either of the following special programs, there may be times when it does not operate as you expect.
Time-of-Use Pricing If you subscribe to Time-of-Use Pricing, the thermostat displays the rate in effect, see Fig. 1. You cannot adjust which rate is in effect; you can only adjust the temperature offset value for each rate. Refer to Programming Your Thermostat section for information on setting the offset value for Time-of-Use Pricing. To notify you a rate change will be occurring, the Time-of-Use indicator on the thermostat begins blinking onehalf hour before the rate change takes effect.
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 TWO AA ALKALINE BATTERIES AS SHOWN M7905 Fig. 3. Battery replacement.
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 incorrectly. • 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, the system is in in DLC mode and the thermostat is utility controlled. Heating cannot come on until the DLC 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.
Cooling will not come on. (cont.) • The thermostat has a built-in time delay on cooling. To prevent equipment damage, allow five to ten minutes after changing the setting before the air conditioner starts. • If temperature setting is lower than the current temperature, and the display shows COOL, set the system control to the OFF setting for ten minutes. After ten minutes, return the system control to the COOL setting.
The room is too warm or too cool. (cont.) • If you subscribe to Real-time Pricing, you may need to adjust your offset values to provide a more comfortable temperature. • Check the display. If SAVING is displayed, the system is in DLC mode and your thermostat is utility controlled. Cooling or heating cannot come on until the DLC period ends. System ON indicator is lit, but no heat is coming from the registers.
Incorrect room temperature showing on thermostat display. • The thermostat is factory-calibrated, and cannot be adjusted. Thermostat is flashing CALL . • You are a subscriber to one of the special pricing programs and your thermostat has lost communication with the utility company. Call the number displayed on the thermostat or the number on the thermostat label for information. TOLL-FREE CUSTOMER ASSISTANCE For all questions concerning this thermostat, please read and follow the instructions.
WARRANTY CONDITIONS Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer. Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state. If you have any questions concerning this warranty, please write Honeywell Customer Relations, 1985 Douglas Drive North, MN10-1461, Golden Valley, MN 55422. In Canada, write Retail Products ON15, Honeywell Limited/Honeywell Limitée, 35 Dynamic Drive, Scarborough, Ontario M1V 4Z9.
Automation and Control Solutions Honeywell Limited-Honeywell Limitée Honeywell 35 Dynamic Drive 1985 Douglas Drive North Scarborough, Ontario Golden Valley, MN 55422 M1V 4Z9 69-1623 G.H. 5-02 Copyright © 2002 Honeywell All Rights Reserved ® U.S. Registered Trademark Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. 28 www.honeywellcannon.
