Honeywell T7518D, T7518A User Manual

Programmable Commercial Load Management

Thermostat

Weekday/Weekend

(5-day/Saturday/Sunday)

Programmable

T7518A,D

USER’S GUIDE

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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. 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 thermostat also contains a communications module. This module allows your utility company to communicate with your thermostat to take

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-

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ling your home at a higher temperature

SAVINGS INDICATOR

during the cooling season and a lower temperature during the heating season.

TUE

INDICATOR FOR TIME-OF USE PRICING

COOL AUTO

1 2 3 4

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

M7904

under DLC, the word SA VING 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 .

TUE SAVING

COOL AUTO

M7903

Fig. 2. Savings indicator.

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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 Y our 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

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RECOVERY FROM SETBACK

The term 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

recovery

refers to the process the

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.)

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PROGRAMMING YOUR THERMOSTAT

IMPORTANT

Batteries must be installed to maintain time and date in the event of pow er 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

Weekday OCCUPIED

Saturday OCCUPIED

Sunday OCCUPIED

Time Period Time

UNOCCUPIED

Cooling

Temperature

Schedule

Weekday OCCUPIED

Saturday OCCUPIED

Sunday OCCUPIED

Time Period Time

UNOCCUPIED

Heating

Temperature

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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 (+)

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

Offsets for

Heating Season (-)

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 .

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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.

Repeat the above sequence for the UNOCCUPIED weekday schedules.

Press the Weekend Schedule key until

SA T, 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 .

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