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USER’S GUIDE

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Energy Management Thermostat

Weekday/Weekend (5-day/

Saturday/Sunday)Programmable

Heat and/or CoolConventional

and Heat PumpT7512A,B,C,D

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Welcome to the world of comfort and energysavings with your new Honeywell EnergyManagement Thermostat.

This thermostat allows full weekday/weekendprogramming so you can set the thermostat tocontrol the temperature in your home accordingto your personal schedule and preferences.When programmed according to the instructionsin this guide, the features available with thisthermostat will not only keep you comfortable,but will also save you energy.

In addition to being programmable, this thermo-stat also contains a communications module.This module allows your utility company tocommunicate with your thermostat to take

advantage of special programs you can sub-scribe to that can further increase your energysavings.

These special programs can include one or bothof the following:

Time-of-Use Pricing. If your utility offersTime-of-Use Pricing rates, this thermostatwill communicate with the utility to informyou of the rate in effect at any given time.The rate that is in effect is indicated on thethermostat display as shown in Fig. 1. Aspecial feature of this thermostat allowsyou to set an offset temperature thatautomatically adjusts your energy use foreach rate. This typically involves control-

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ling your home at a higher temperatureduring the cooling season and a lowertemperature during the heating season.

Fig. 1. Time-of-use pricing indicator.

Direct Load Control. If your utility offersDirect Load Control (DLC), this thermostatcan be controlled by your utility to limityour cooling and heating use during peakdemand times. When your thermostat is

AM

HR TUE

COOLAUTO

1 2 3 4

M7904INDICATOR FOR TIME-OF USE PRICING

under DLC, the word SAVING is displayedon the thermostat. See Fig. 2.

You must subscribe to these programsbefore your utility company can communi-cate with your thermostat. If you have anyquestions concerning the application of thisthermostat or these special programs andfeatures, please contact your local utility.

AM

HR TUE SAVING

COOLAUTO

M7903SAVINGS INDICATOR

Fig. 2. Savings indicator.

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Table Of Contents

Recovery From Setback ................................................................................................................ 5Programming Your Thermostat ...................................................................................................... 6Personal Programming Charts ...................................................................................................... 8

Step 1—Set the Current Time/Day ...................................................................................... 10Step 2—Enter the Program Schedules ............................................................................... 10Step 3—Set the System and Fan Controls .......................................................................... 12Step 4—Start the Thermostat Program ............................................................................... 14

Operating Your Thermostat ........................................................................................................... 14Thermostat Operation When Special Programs are in Effect ....................................................... 18Replacing the Thermostat Batteries .............................................................................................. 20Troubleshooting Guide .................................................................................................................. 22Toll-Free Customer Assistance ..................................................................................................... 27Warranty Conditions ...................................................................................................................... 28

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RECOVERY FROM SETBACK

The term recovery refers to the process thethermostat uses to operate the heating orcooling equipment to return the house from theenergy savings setting you selected for whenyou are away or asleep to the temperature youprefer when you are home and awake.

This thermostat uses a recovery process thatturns your heating/cooling equipment on or off atthe time you program the temperature tochange. For example, if you program thethermostat’s heating program to 72°F at 6:00AM, the heating equipment will come on at 6:00AM and begin warming the house to 72°F. If you

want the temperature in the house to be 72°F at6:00 AM, you should program the thermostat toan earlier time; for example, 5:30. (The exactamount of time it takes your home to warm orcool to the temperature you want depends onmany factors such as the size of your heating/cooling equipment and the outdoor tempera-ture.)

If this thermostat is for a heat pump system, thethermostat uses an algorithm when recoveringfrom setback that helps reduce the use ofauxiliary heat.

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PROGRAMMINGYOUR THERMOSTAT

IMPORTANTBatteries must be installed to maintaintime and date in the event of power loss.

You will find it helpful to complete the PersonalProgramming Charts on the following pagesbefore you begin programming the thermostat.

Plan your program schedule of time andtemperature settings for various times of the dayby filling in the boxes in the Personal Program-ming Charts. There are four time periodsavailable for weekdays, Saturday, and Sunday—

WAKE, LEAVE, RETURN, and SLEEP on theT7512A,B,C,D Thermostats. These periods canbe displayed individually on the thermostat asyou press the WEEKDAY SCHEDULE orWEEKEND SCHEDULE keys. You may want toenter a different schedule for the cooling and theheating seasons.

WAKE is the time you get up. Generally youwant the house at a comfortable tempera-ture when you wake up and get ready togo to work or school. Set the WAKE timeearlier than your alarm clock so the house

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has time to warm up or cool down beforeyou get up.

LEAVE is the time you leave for work orschool. Generally, once you leave thehouse, you want the temperature higher orlower (depending on the season) so thatyou can save energy while you are away.

RETURN is the time you return from work orschool. Once again, you want the house ata comfortable temperature when youreturn and go about the normal activitiesof your day before bedtime. Set theRETURN time earlier than the time youactually get home so the house has timeto warm up or cool down before you getthere.

SLEEP is the time you usually go to sleep.While you are sleeping, you can saveenergy by setting the thermostat to controlthe temperature higher or lower (depend-ing on the season). For more comfortablesleeping, some people choose not to raisethe cooling temperature at night.

If you decide not to program the thermostat, itautomatically controls heating and coolingtemperatures as follows:

Starting at 6:00 AM every day, the thermostatsets the heating temperature to 68° and thecooling temperature to 76°F.

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At 10:00 PM every night, the thermostat sets theheating temperature back to 60°F; the coolingtemperature remains at 76°F.

You do not need to enter a time and temperatureprogram for every period if your schedule doesnot require it. For example, if your house isoccupied during the day on weekdays, you canprogram only the WAKE and SLEEP times.

NOTE: Temperatures cannot be set any higherthan 88°F or any lower than 45°F.

Personal Programming ChartsCooling Schedule (for Summer Use):

ScheduleTime

Period TimeCooling

TemperatureWeekday WAKE

LEAVERETURNSLEEP

Saturday WAKELEAVERETURNSLEEP

Sunday WAKELEAVERETURNSLEEP

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Heating Schedule (for Winter Use): If you subscribe to Time-of-Use Pricing, use thefollowing table to plan the offset values you willenter for each Time-of-Use Pricing rate, use anumerical value as described in Enter OffsetValues. You should enter a different offset valuefor the heating and cooling seasons, see chart.You do not need to enter an offset for rate 1.

ScheduleTime

Period TimeHeating

TemperatureWeekday WAKE

LEAVERETURNSLEEP

Saturday WAKELEAVERETURNSLEEP

Sunday WAKELEAVERETURNSLEEP

Offsets for Cooling Season (+)

Offsets for Heating Season (-)

Rate 2 Rate 3 Rate 4 Rate 2 Rate 3 Rate 4

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Before programming the thermostat, remove theclear plastic overlay that covers the display.When pressing the keys, use the ball of yourfinger or a soft pencil eraser; using sharpfingernails or pencil points can damage thekeypad. If you make a mistake during program-ming, press the Run Program key and repro-gram the time, temperature, or offset value withthe error.

Step 1—Set the Current Time/DayTo set the time, press and release the SetClock/Day key once. Press Ahead or Backkeys until the current time is displayed. To setthe day, press and release the Set Clock/Daykey again. Press Ahead or Back keys until the

current day is displayed. After you have set thetime and day, press the Run Program key.

Step 2—Enter the Program SchedulesEntering a Heating ScheduleRefer to your Personal Programming Charts andproceed as follows:

Press the System key until the thermostatdisplays the word HEAT to indicate youare in the heating mode. Press andrelease the Weekday Schedule key once.The words WAKE, MON...FRI and SETappear on the display.

Press the Ahead or Back keys to set theweekday WAKE time from your PersonalProgramming Charts. Press the Warmer

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or Cooler keys to set the weekday WAKEtemperature from your Personal Program-ming Charts.

Repeat the above sequence for the otherweekday schedules: LEAVE, RETURN, andSLEEP.

Press the Weekend Schedule key until SAT,WAKE and SET appear on the display. Setthe WAKE, LEAVE, RETURN and SLEEPschedules for Saturday just as you did forthe weekdays.

Press the Weekend Schedule key again sothat SUN, WAKE and SET appear on thedisplay. Set the WAKE, LEAVE, RETURNand SLEEP schedules for Sunday just asyou did for the weekdays and Saturday.

Enter Offset ValuesEnter the offset value for each Time-of-UsePricing rate using the Offset key. You can enteroffset numbers only if you are a subscriber toTime-of-Use Pricing.

The offset value you enter is the number ofdegrees you are willing to allow the heating orcooling temperature you have already pro-grammed for normal operation to change so youcan save money at each rate. For example, ifyou normally want your home heated to 72°when rate 1 is in effect, but are willing to let yourhome cool to 70° when rate 2 is in effect, yourheating offset value 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

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for rate 1 is displayed (note the indicator on thethermostat display as shown in Fig. 1). Use theWarmer and Cooler keys to set the offset value.Repeat the procedure for each rate. After youhave entered the last offset value, press theRun Program key.

Entering a Cooling SchedulePress the System key until the thermostatdisplays the word COOL to indicate you are inthe cooling mode.

Enter cooling temperatures for the WAKE,LEAVE, RETURN and SLEEP times byfollowing the same instructions as for Entering aHeating Schedule above. If you subscribe to

Time-of-Use Pricing, enter offset values for thecooling season as you did for the heatingseason.

Step 3—Set the Systemand Fan ControlsAfter programming the thermostat, set thesystem and fan controls as follows:

System ControlIf you have a conventional heating/coolingsystem, the system can be set to: HEAT, COOLor OFF. If you have a heat pump system, thesystem can be set to: HEAT, EM. HEAT, COOLor OFF.

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You can change the system setting by pressingthe System key. Each time you press the key,the system status changes to the next setting.

The status of the system is as follows when theassociated indicator is displayed:

HEAT: The thermostat will control yourheating system according to the scheduleyou programmed (heat pump in heatingmode).

EM. HEAT: The thermostat will disable theheat pump and control the emergencyheater element according to the scheduleyou programmed.

COOL: The thermostat will control your airconditioning system according to the

schedule you programmed (heat pump incooling mode).

No status: Both the heating and air condition-ing systems are off (heat pump off)displayed.

Fan ControlThere are two fan settings: AUTO and ON.

Set the fan at the setting you want by pressing theFan key. Each time you press the key, the fanstatus changes to the next setting.

When FAN is displayed, the fan is on continu-ously. Use this setting for improved air circulationduring special occasions or for more efficientelectronic air cleaning.

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When nothing is displayed, the fan is in AUTOmode (it comes on with the heating or coolingequipment, as needed). AUTO is the normalsetting for most homes and allows a single-speed fan to turn on automatically with the airconditioner or furnace. If you have a two-speedfan, it usually runs on high with the air condi-tioner and on low with the furnace.

Step 4—Start the Thermostat ProgramTo start the thermostat using the program youhave just entered, press the Run Program key.

OPERATING YOUR THERMOSTAT

Normally you want your thermostat to runaccording to the program you entered; however,you can also change your program to performthe following operations.

NOTE: The system control must be set toHEAT or COOL to perform the followingoperations.

Temporarily Change Temperature Settingfor the Current Period OnlyPress the Warmer or Cooler key until thetemperature you want is displayed. The tempo-rary setting stays in effect only until the next

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scheduled program change. (If you subscribe toTime-of-Use Pricing, it stays in effect only untilthe next rate change.) To cancel the temperaturechange, press the Run Program key. When atemporary temperature is in effect, the displayalternates between the time/temperature and thetemporary setting.

Hold a Temperature IndefinitelyYou could find this operation useful when you goout of town on business or on vacation.Press the Hold Temp key and then set thetemperature using the Warmer or Cooler keys.This temperature stays in effect until you pressthe Run Program key.

Check the Current Temperature SettingTo check the current (programmed) temperaturesetting, press the Present Setting key. Thenverify the setting you selected.

Check the Programs You EnteredPress the Weekday Schedule or WeekendSchedule key. Each time you press the key, thenext program schedule is displayed. You can usethis feature to verify that you correctly enteredthe program as shown in your Personal Pro-gramming Charts.

Cancel a ProgramYou can cancel a program by pressing theWeekday Schedule or Weekend Schedule key

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until the program you want to cancel is dis-played; then press the Clear key.

NOTE: You cannot cancel the WEEKDAYWAKE program.

Check UsageThis thermostat keeps a record of the currentand accumulated on-time of your heating andcooling equipment. It tracks current day usage(since midnight) and accumulated usage (sincethe accumulator was last cleared). If yousubscribe to Time-of-Use Pricing, the thermostatrecords usage for each rate.

To view heating or cooling equipment usage,press the System key to display HEAT or

COOL, then press the Usage key. Each time youpress the Usage key, the thermostat displays thenext usage value. The HR and MIN segmentsare lit and the display shows the numerical valuefor each.

If you do not subscribe to Time-of-Use Pricing,the thermostat displays current usage the firsttime you press the Usage key and accumulatedusage the next time you press the Usage key.

If you subscribe to Time-of-Use Pricing, thereare eight usage values that can be displayed.The first time you press the Usage key, thethermostat displays the current usage value forrate 1. Each time you press the Usage keyagain, usage values for rates 2, 3 and 4 ,

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respectively,are then incrementally displayed. Ifyou continue to press the Usage key, accumu-lated usage values are repeated for rates 1through 4.

Press the Run Program key to stop viewingusage.

Current day usage is automatically cleared atmidnight. To clear an accumulated value, pressthe Usage key until the value you want to clearis displayed and then press the Clear key. If yousubscribe to Time-of-Use Pricing, your utility canalso clear the accumulators by sending amessage to the thermostat.

Permanently Change a ProgramTo permanently change a program, repeat theappropriate steps in Programming Your Thermo-stat.

Return to Normal Program or Start ProgramAny time you want to return to the normalprogram or start the program, press the RunProgram key. If you temporarily changed thetemperature or you used the Hold Temp key,pressing the Run Program key will cancel yourchange.

Change Fan or System Control SettingsChange the fan setting by pressing the Fan key.Each time you press the key, the fan status

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changes to the next setting. When FAN isdisplayed, the fan is on continuously. Whennothing is displayed, the fan is in AUTO mode (itcomes on with the heating or cooling equipment,as needed).

Change the system setting by pressing theSystem key. Each time you press the key, thesystem status changes to the next setting.

THERMOSTAT OPERATIONWHEN SPECIAL PROGRAMSARE IN EFFECT

Normally your thermostat operates as youprogrammed it. If you subscribe to either of thefollowing special programs, there may be timeswhen it does not operate as you expect. Beforecalling for service, read the following information.

Direct Load Control (DLC)When the thermostat is operating under DLC,the amount of time your heating/cooling systemcan operate is controlled by radio signal from

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your utility company. If you notice the tempera-ture in your home is higher or lower than thesetting you programmed into the thermostat,check the thermostat display. To indicate theequipment is under DLC, the thermostat displaysthe word SAVING. You cannot control theheating/cooling equipment when it is under DLC.

When the utility releases your thermostat fromDLC, your heating or cooling equipment may notbe immediately available. To prevent damage toyour heating and cooling equipment and to allowthe utility to bring the equipment on-line effec-tively of all homes that subscribe to DLC, yourthermostat automatically calculates and initiatesa time delay before the heating or cooling

equipment comes on. You cannot override thistime delay.

Time-of-Use PricingIf you subscribe to Time-of-Use Pricing, thethermostat displays the rate in effect, see Fig. 1.You cannot adjust which rate is in effect; you canonly adjust the temperature offset value for eachrate. Refer to Programming Your Thermostatsection for information on setting the offset valuefor Time-of-Use Pricing. To notify you a ratechange will be occurring, the Time-of-Useindicator on the thermostat begins blinking one-half hour before the rate change takes effect.

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When a rate change message is received by thethermostat, your heating/cooling systemautomatically operates at the temperature andoffset value you programmed. You cannottemporarily override the offset. If you need tochange the offset, refer to Programming YourThermostat.

For additional information about either of theseprograms, contact your utility company.

REPLACING THETHERMOSTAT BATTERIES

IMPORTANTBatteries must be installed to maintainthe time and date in the event of apower loss. Although the thermostathas a low battery indicator, replace thebatteries once every two years toprevent the thermostat from losing itstime/date information in the event of amomentary power loss.

As the batteries run low, the display shows bAtLo. This low battery indication flashes for one to

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two months before the batteries run out com-pletely. Replace the batteries as soon aspossible after the indicator starts flashing.

You will need two AA alkaline batteries; non-alkaline batteries will not last as long, and canleak, causing damage to the thermostat or thewall surface. We recommend Energizer®batteries.• Use a coin to carefully remove the battery

door.• Press down on the left ends of the batteries

to remove them.• Install the fresh batteries as shown in Fig. 3.

Make sure positive and negative terminalsare oriented correctly.

• Replace the battery door.

INSTALL TWO AA ALKALINE BATTERIES AS SHOWN

M7905

Fig. 3. Battery replacement

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TROUBLESHOOTING GUIDE

IF... THEN…Display will not come on. • There is no power applied to the thermostat. Check fuse or

circuit breaker.

Temperature display will not • You have reached the temperature setting limit. The settinggo lower than 45°F or higher range is 45°F to 88°F.than 88°F during programming.

Temperature change occurs • Check the program times for the period in question. Be sureincorrectly. that AM and PM indications are correct. Make sure the current

day and time are correct. Reprogram if necessary.• Remember that it takes time for the system to recover. Refer

to Recovery from Setback section.

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Heating will not come on. • Check that the system control on the thermostat is set toHEAT.

• Check the display. If SAVING is displayed, the system is in inDLC mode and the thermostat is utility controlled. Heatingcannot 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 toCOOL.

• Check the system fuse or circuit breaker and replace or reset,if necessary.

• Check the display. If SAVING is displayed, the system is inDLC mode and the thermostat is utility controlled. Coolingcannot come on until the DLC period ends.

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Cooling will not come on. (cont.) • The thermostat has a built-in time delay on cooling. To preventequipment damage, allow five to ten minutes after changingthe 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 theOFF setting for ten minutes. After ten minutes, return thesystem control to the COOL setting. If the air conditionercomes on, the compressor may have reached its high limittemperature protection and shut down. If the air conditionerdoes not come on after ten minutes and the display showsCOOL, contact your utility.

The house is too warm or • Press Present Setting key to check the current temperaturetoo cool. setting.

• If desired, change the temperature setting. See OperatingYour Thermostat section.

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The house is too warm or • If you subscribe to Real-time Pricing, you may need to adjusttoo cool. (cont.) your offset values to provide a more comfortable temperature.

• Check the display. If SAVING is displayed, the system is inDLC mode and your thermostat is utility controlled. Cooling orheating cannot come on until the DLC period ends.

System ON indicator is lit, • Allow time for the furnace or heat pump to heat up and thebut no heat is coming from fan to come on before checking for heat at the register.the registers.

The thermostat’s current • Be aware that it is normal for the current setting andsetting does not match display temperature to differ occasionally.the display temperature. • During recovery from setback or setup, setting and display

temperatures may differ to within ±1° for up to 30 minutesafter the recovery period.

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Incorrect room temperature • The thermostat is factory-calibrated, and cannot be adjusted.showing on thermostat display. • You are a subscriber to one of the special pricing programsThermostat is flashing and your thermostat has lost communication with the utilityCALL <xxx-xxxx>. company. Call the number displayed on the thermostat or the

number on the thermostat label for information.

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TOLL-FREE CUSTOMER ASSISTANCE

For all questions concerning this thermostat, please read and follow the instructions. If additionalassistance is needed, call your utility’s Customer Assistance number.

Before you call, please have the following information available—thermostat model number anddate code, type of heating/cooling system (hot water, warm air, oil, gas, heat pump, etc).

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WARRANTY CONDITIONS.C.WARRANTY CONDITIONS;Honeywell warrants this product, excluding battery, to be free from defects in the workmanship ormaterials, under normal use and service, for a period of one (1) year from the date of purchase bythe 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.

If the product is defective,(i) return it, with a bill of sale or other dated proof of purchase, to the retailer from which you

purchased it, or(ii) package it carefully, along with proof of purchase (including date of purchase) and a short

description of the malfunction, and mail it, postage prepaid, to the following address:Honeywell Inc.Return Goods Department1050 Berkshire LanePlymouth, MN 55441-4437

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This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it isshown by Honeywell that the defect or malfunction was caused by damage which occurred whilethe product was in the possession of a consumer.

Honeywell’s sole responsibility shall be to repair or replace the product within the terms statedabove. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND,INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY ORINDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANYOTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limitation ofincidental or consequential damages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THISPRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIESOF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITEDTO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow limitations onhow long an implied warranty lasts, so the above limitation may not apply to you.

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This warranty gives you specific legal rights, and you may have other rights which vary from stateto state.

If you have any questions concerning this warranty, please write our Customer Assistance Center,Honeywell Inc., P.O. Box 524, Minneapolis, MN 55440-0524. In Canada, write Retail ProductsON15-02H, Honeywell Limited/Honeywell Limitée, 155 Gordon Baker Road, North York, OntarioM2H 2C9.

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32 69-115369-1153 R.L. 9-97Copyright © 1997 Honeywell Inc. All Rights Reserved ® U.S. Registered Trademark www.honeywell.com/yourhome

Home and Building ControlHoneywell Limited-Honeywell Limitée155 Gordon Baker RoadNorth York, OntarioM2H 3N7

Home and Building ControlHoneywell Inc.Honeywell PlazaP.O. Box 524Minneapolis, MN 55408-0524

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