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USER’S GUIDE

Programmable Commercial Load Management

Thermostat

Weekday/Weekend

(5-day/Saturday/Sunday)

Programmable

T7518A,D

69-1623

Welcome to the world of comfort and energy

savings with your new Honeywell Programmable

Load Management Thermostat.

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.

When programmed according to the instructions

in this guide, the features available with this

thermostat 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 to

communicate with your thermostat to take

advantage of special programs you can sub-

scribe to that can further increase your energy

savings.

These special programs can include one or both

of the following:

Time-of-Use Pricing. If your utility offers

Time-of-Use Pricing rates, this thermostat

will communicate with the utility to inform

you of the rate in effect at any given time.

The rate that is in effect is indicated on the

thermostat display as shown in Fig. 1. A

special feature of this thermostat allows

you to set an offset temperature that

automatically adjusts your energy use for

each rate. This typically involves control-

69-1623

ling your home at a higher temperature

during the cooling season and a lower

temperature during the heating season.

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

Direct Load Control. If your utility offers

Direct Load Control (DLC), this thermostat

can be controlled by your utility to limit

your cooling and heating use during peak

demand times. When your thermostat is

TUE

COOL

AUTO

1 2 3 4

M7904

INDICATOR FOR TIME-OF USE PRICING

under DLC, the word SAVING is displayed

on the thermostat. See Fig. 2.

You must subscribe to these programs

before your utility company can communi-

cate 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.

TUE

SAVING

COOL

AUTO

M7903

SAVINGS INDICATOR

Fig. 2. Savings indicator.

69-1623

Table Of Contents

Recovery From Setback ........................................................................................................ 5

Programming Your Thermostat .............................................................................................. 6

Programming Charts..............................................................................................................7

Step 1—Set the Current Time/Day ........................................................................................ 8

Step 2—Enter the Program Schedules.................................................................................. 9

Step 3—Set the System and Fan Controls ............................................................................ 11

Step 4—Start the Thermostat Program ................................................................................. 12

Operating Your Thermostat .................................................................................................... 12

Thermostat Operation When Special Programs are in Effect ................................................ 16

Replacing the Thermostat Batteries....................................................................................... 18

Troubleshooting Guide...........................................................................................................20

Toll-Free Customer Assistance .............................................................................................. 24

Warranty Conditions .............................................................................................................. 25

69-1623

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.

This thermostat uses a recovery process that

turns your heating/cooling equipment on or off at

the time you program the temperature to

change. For example, if you program the

thermostat’s heating program to 72°F at 6:00

AM, the heating equipment will come on at 6:00

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 exact amount of time it

takes 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.)

69-1623

PROGRAMMING

YOUR THERMOSTAT

IMPORTANT

Batteries must be installed to maintain

time and date in the event of power loss.

You will find it helpful to complete the Personal

Programming Charts on the following pages

before you begin programming the thermostat.

Plan your program schedule of time and

temperature settings for various times of the

day by filling in the boxes in the Personal

Programming Charts. There are two time

periods available for weekdays, Saturday, and

Sunday—OCCUPIED and UNOCCUPIED on

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.

If you decide not to program the thermostat, it

automatically controls heating and cooling

temperatures as follows:

Starting at 6:00 AM every day, the thermostat

sets the heating temperature to 68° and the

cooling temperature to 76°F.

At 10:00 PM every night, the thermostat sets

the heating temperature back to 60°F; the

cooling temperature remains at 76°F.

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NOTE: Temperatures cannot be set any

higher than 88°F or any lower than

45°F.

Programming Charts

Cooling Schedule (for Summer Use):

Heating Schedule (for Winter Use):

Schedule

Time Period Time

Cooling

Temperature

Weekday OCCUPIED

UNOCCUPIED

Saturday OCCUPIED

UNOCCUPIED

Sunday OCCUPIED

UNOCCUPIED

Schedule

Time Period Time

Heating

Temperature

Weekday OCCUPIED

UNOCCUPIED

Saturday OCCUPIED

UNOCCUPIED

Sunday OCCUPIED

UNOCCUPIED

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If you make a mistake during programming,

press the Run Program key and reprogram

the time, temperature, or offset value with the

error.

Step 1—Set the Current Time/Day

To set the time, press and release the Set

Clock/Day key once. Press Ahead or Back

keys until the current time is displayed. To set

the day, press and release the Set Clock/Day

key again. Press Ahead or Back keys until the

current day is displayed. After you have set

the time and day, press the Run Program key.

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.

Offsets for

Cooling Season (+)

Offsets for

Heating Season (-)

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

69-1623

Repeat the above sequence for the UNOCCU-

PIED 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 UNOCCU-

PIED and SET appear on the display.

Set the OCCUPIED and UNOCCUPIED

schedules for Sunday just as you did for

the weekdays and Saturday.

Step 2—Enter the Program Schedules

Entering a Heating Schedule

Refer to your Programming Charts and

proceed as follows:

Press the System key until the thermostat

displays the word HEAT to indicate you

are in the heating mode. Press and

release the Weekday Schedule key

once. The words WAKE, MON...FRI and

SET appear on the display.

Press the Ahead or Back key to set the

weekday OCCUPIED time from your

Programming Charts. Press the

Warmer or Cooler key to set the

weekday OCCUPIED temperature from

your Programming Charts.

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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.

The offset value you enter is the number of

degrees you are willing to allow the heating or

cooling temperature you have already pro-

grammed for normal operation to change so

you can save money at each rate. For ex-

ample, if you normally want the room heated to

72° when rate 1 is in effect, but are willing to let

the room cool to 70° when rate 2 is in effect,

your heating 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 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.

Entering a Cooling Schedule

Press the System key until the thermostat

displays the word COOL to indicate you are in

the cooling mode.

Enter cooling temperatures for the OCCUPIED

and UNOCCUPIED times by following the

same instructions as for Entering a Heating

Schedule above. If you subscribe to Time-of-

Use Pricing, enter offset values for the cooling

season as you did for the heating season.

69-1623

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.

The status of the system is as follows when the

associated indicator is displayed:

HEAT: The thermostat will control your

heating system according to the schedule

you programmed (heat pump in heating

mode).

COOL: The thermostat will control your air

conditioning system according to the

schedule you programmed (heat pump

in cooling mode).

No status: Both the heating and air condi-

tioning systems are off displayed.

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 continu-

ously. Use this setting for improved air circula-

tion.

69-1623

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.

Step 4—Start the Thermostat Program

To start the thermostat using the program you

have just entered, press the Run Program key.

OPERATING YOUR THERMOSTAT

Normally you want your thermostat to run

according to the program you entered;

however, you can also change your program to

perform the following operations.

NOTE: The system control must be set to

HEAT or COOL to perform the

following operations.

Temporarily Change Temperature Setting

for the Current Period Only

Press the Warmer or Cooler key until the

temperature you want is displayed. The

temporary setting stays in effect only until the

next scheduled program change. (If you

69-1623

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.

Hold a Temperature Indefinitely

Press the Hold Temp key and then set the

temperature using the Warmer or Cooler keys.

This temperature stays in effect until you press

the Run Program key.

Check the Current Temperature Setting

To check the current (programmed) tempera-

ture setting, press the Present Setting key.

Then verify the setting you selected.

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. You

can use this feature to verify that you correctly

entered the program as shown in your Per-

sonal Programming Charts.

Check Usage

This thermostat keeps a record of the current

and accumulated on-time of your heating and

cooling equipment. It tracks

current day

usage

(since midnight) and

accumulated

usage (since

the accumulator was last cleared). If you

subscribe to Time-of-Use Pricing, the thermo-

stat records usage for each rate.

69-1623

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. The HR and

MIN segments are lit and the display shows the

numerical value for each.

If you do not subscribe to Time-of-Use Pricing,

the thermostat displays current usage the first

time you press the Usage key and accumu-

lated usage the next time you press the Usage

key.

If you subscribe to Time-of-Use Pricing, there

are eight usage values that can be displayed.

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 ,

respectively, are then incrementally displayed.

If you continue to press the Usage key,

accumulated usage values are repeated for

rates 1 through 4.

Press the Run Program key to stop viewing

usage.

Current day usage is automatically cleared at

midnight. To clear an accumulated value, press

the Usage key until the value you want to clear

is displayed and then press the Clear key. If

you subscribe to Time-of-Use Pricing, your

utility can also clear the accumulators by

sending a message to the thermostat.

69-1623

Permanently Change a Program

To permanently change a program, repeat the

appropriate steps in Programming Your

Thermostat.

Return to Normal Program or Start Program

Any time you want to return to the normal

program or start the program, press the Run

Program key. If you temporarily changed the

temperature or you used the Hold Temp key,

pressing the Run Program key will cancel

your change.

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).

Change the system setting by pressing the

System key. Each time you press the key, the

system status changes to the next setting.

69-1623

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. Before

calling for service, read the following informa-

tion.

Direct Load Control (DLC)

When the thermostat is operating under DLC,

the amount of time your heating/cooling system

can operate is controlled by radio signal from

your utility company. If you notice the 10 AM

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.

When the utility releases your thermostat from

DLC, your heating or cooling equipment may

not be immediately available. To prevent

damage to your heating and cooling equipment

and to allow the utility to bring the equipment

on-line effectively, your thermostat automati-

cally calculates and initiates a time delay

before the heating or cooling equipment comes

on. You cannot override this time delay.

69-1623

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 one-

half 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 value you programmed. You cannot

temporarily override the offset. If you need to

change the offset, refer to Programming Your

Thermostat.

For additional information about either of these

programs, contact your utility company.

69-1623

REPLACING THE

THERMOSTAT BATTERIES

IMPORTANT

Batteries must be installed to

maintain the time and date in the

event of a power loss. Although the

thermostat has a low battery

indicator, replace the batteries once

every two years to prevent the

thermostat from losing its time/date

information in the event of a momen-

tary power loss.

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.

You will need two AA alkaline batteries; non-

alkaline batteries will not last as long, and can

leak, causing damage to the thermostat or the

wall surface.

• 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 terminals

are oriented correctly.

• Replace the battery door.

69-1623

Fig. 3. Battery replacement.

INSTALL TWO AA ALKALINE

BATTERIES AS SHOWN

M7905

69-1623

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 setting

go 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

incorrectly. sure 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.

69-1623

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 tempera-

ture, 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 system fuse or circuit breaker and replace or

reset, if necessary.

• Check the display. If SAVING is displayed, the system is in

DLC mode and the thermostat is utility controlled. Cooling

cannot come on until the DLC period ends.

69-1623

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 tempera-

ture, 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. If the air

conditioner comes on, the compressor may have reached

its high limit temperature protection and shut down. If the

air conditioner does not come on after ten minutes and the

display shows COOL, contact your utility.

The room is too warm or • Press Present Setting key to check the current tempera-

too cool. ture setting.

• If desired, change the temperature setting. See Operating

Your Thermostat section.

69-1623

The room is too warm or • If you subscribe to Real-time Pricing, you may need to

too cool. (cont. ) 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, • Allow time for the furnace to heat up and the

but 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 and

setting 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 minutes

after the recovery period.

69-1623

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, etc).

Incorrect room temperature • The thermostat is factory-calibrated, and cannot be

showing on thermostat display. adjusted.

Thermostat is flashing •You are a subscriber to one of the special pricing pro-

CALL <xxx-xxxx>. grams 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.

69-1623

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 pur-

chase 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.

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 Return Goods

Dock 4, MN10-3860

Douglas Drive North

Golden Valley, MN 55422

69-1623

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. HONEYWELL SHALL NOT BE LIABLE FOR ANY LOSS OR DAMAGE OF ANY KIND,

INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY

OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR

ANY OTHER FAILURE OF THIS PRODUCT. Some states do not allow the exclusion or limita-

tion of incidental or consequential damages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS

PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRAN-

TIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY

LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow

limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

69-1623

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.

69-1623

69-1623 G.H. 5-02

Honeywell Limited-Honeywell Limitée

35 Dynamic Drive

Scarborough, Ontario

M1V 4Z9

Automation and Control Solutions

Honeywell

1985 Douglas Drive North

Golden Valley, MN 55422

Printed in U.S.A. on recycled

paper containing at least 10%

post-consumer paper fibers.

www.honeywellcannon.com

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