Honeywell TD2400 User Manual

Programmable Thermostat

by Duracraft

OWNER’S GUIDE

Weekday/Weekend (5-day/ 2-day)

Programmable Heat and/or Cool

Low Voltage (20 to 30 Vac)

Thermostat and Mounting Plate

Model TD2400

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M3701

MERCURY SWITCH

Welcome to the world of comfort and energy savings with your new Duracraft Programmable Thermostat. Your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy when programmed according to the instructions in this manual.

Direct any questions concerning the application of this thermostat to Duracraft Consumer Services at 1-800-554-4558, Monday-Friday 7:00 a.m.-5:30 p.m., Eastern time.

RECYCLING THERMOSTAT

If this thermostat is replacing a thermostat that contains mercury in a sealed tube, do not place your old thermostat in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of your old thermostat.

If you have questions, call Duracraft at 1-800-554-4558.

Fig. 1. Typical location of a mercury switch in a thermostat.

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Table Of Contents

Step 1. Prepare For Installation ..................................................................................................... 4

Step 2. Remove Old Thermostat .................................................................................................... 6

Step 3. Install The Batteries ........................................................................................................... 7

Step 4. Program The Thermostat ................................................................................................ 10

Step 5. Adjust Fan Operation Switch, as Required.................................................................... 18

Step 6. Adjust System On-Time,

Step 7. Mount Thermostat Mounting Plate ................................................................................. 20

Step 8. Wire Thermostat Terminals ............................................................................................. 21

Step 9. Mount The Thermostat..................................................................................................... 25

Step 10. Check Thermostat Operation After Programming and Installing .............................. 26

Step 11. Set The Fan and System Switches ............................................................................... 28

Troubleshooting Guide................................................................................................................. 30

Limited One-Year Warranty ............................................................................... Inside Back Cover

°F/°C, as Required .................................................................. 18

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Step 1. Prepare for Installation

❑ Check Table 1 to make sure this thermostat is compatible with your system. If not, return to

retailer. For more information, call Duracraft Consumer Services, toll-free 1-800-554-4558.

System Type Compatible With TD2400

Gas—Standing Pilot Yes Gas—Electronic Ignition Ye s Gas-Fired Boilers Yes Gas—Millivolt No Oil-Fired Boilers Yes Oil-Fired Furnace Yes Electric Furnace Yes Electric Air Conditioning Ye s Baseboard Electric (120/240 Line Volt) No Heat Pumps/Multistage Equipment No

Not compatible with any 120/240 volt circuit.

Compatible with 2-wire Honeywell zone valves. Isolating relay required for 3-wire thermostats for zone valves.

Not compatible with 2-wire White-Rodgers no. 1361 valves.

Compatible with hot water baseboard systems. Will not work efficiently on steam or gravity systems.

Table 1. Compatibility Chart.

a,b

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❑ Acquire tools and items as needed (below). Also purchase two AA alkaline batteries; we

recommend Energizer

batteries.

CROSS-RECESSED SCREWDRIVER

HAND OR POWER DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED TO DRILL HOLES IN WALL

WIRE CUTTER/STRIPPER OR SHARP KNIFE, IF NEEDED TO STRIP WIRES

LEVEL, IF NEEDED TO LEVEL THERMOSTAT FOR APPEARANCE

MASKING TAPE, IF NEEDED TO LABEL WIRES AS DISCONNECTED FROM OLD THERMOSTAT

M878B

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WIRES THROUGH WALL OPENING

M5136

Step 2. Remove Old Thermostat

❑ Test to make certain that your heating and

cooling systems are working properly. If either does not work, contact your local heating/air conditioning dealer. To avoid compressor damage, do not operate the cooling system when outdoor temperature is below 50°F (10°C).

❑ TURN OFF POWER to system at the

furnace, or at the fuse/circuit breaker panel.

❑ Carefully unpack your new thermostat and

mounting plate; save package of screws, instructions and receipt.

❑ Remove cover from old thermostat. If it

does not snap off when pulled firmly from the bottom, check for a screw used to lock on the cover.

❑ Loosen screws holding thermostat to ❑ Disconnect wires from old thermostat or

subbase, wallplate or wall, and lift away.

subbase. As you disconnect each wire, use

masking tape to label it with the old terminal designation. If there are only two wires, they do not need to be labeled. If there is an extra wire that is not connected to your old thermostat, you will also not be connecting it to your new thermostat. Keep the wires from falling back into the wall by wrapping them around a pencil as shown.

Replacing a Clock Thermostat that has C or C1 Clock Terminals?

If you are replacing a Honeywell Chronotherm Thermostat, you may find one or two wires that go to the C or C1 clock terminals on the

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Chronotherm® Thermostat wiring wallplate. Do not allow them to touch, or you may damage your transformer. Disconnect the wires and wrap them separately, using electrical tape. Do not wrap them together. Place the wires where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation labels of the remaining wires.

Six or more wires?

If there are six or more wires (excluding clock wires attached to terminals), you most likely have a variation of a heat pump or multistage system. The thermostat is not compatible with such systems so return the product to the place of purchase. If you would like information about which programmable thermostats will work with your system, call Duracraft Consumer Services at 1-800-554-4558.

Three thermostat wires?

If you have three wires for heating only and can operate the fan using the fan ON switch, this thermostat will work with your system. However, some hot water (zoned) heating systems have three thermostat wires. The thermostat will not work without installing an isolating relay on these systems. For details, call Duracraft Consumer Services at 1-800554-4558.

Step 3. Install the Batteries

IMPORTANT

Batteries must be installed for programming and operation of the thermostat and heating/cooling system.

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❑ Purchase two AA alkaline batteries; non-

M12492

REMOVING BATTERY DOOR

BATTERY DOOR COVER

alkaline batteries will not last as long, and may leak, causing damage to the thermostat or the wall surface. We recommend Energizer® batteries.

❑ Open the top cover of thermostat to access

control panel and battery compartment.

❑ Make sure the thermostat is set in the OFF

position.

❑ Use a coin to remove battery cover. ❑ Install the fresh batteries as shown, making

sure positive and negative terminals are oriented correctly.

❑ Replace battery cover.

As the batteries are running low, a bAt Lo indicator will flash for 1 to 2 months before batteries run out completely. Replace the batteries as soon as possible after the indicator starts flashing. If you do not replace the batteries sometime during the flashing bAt Lo,

the indicator will eventually stop flashing. bAtLo will stay on without flashing, indicating the thermostat and heating/cooling system have stopped working when the batteries are almost completely dead.

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After the batteries are completely dead, the bAt-Lo indicator will disappear, leaving a completely blank display.

the display is blank, the batteries are dead or incorrectly installed and you will have to reprogram. See pages 14 to 17 to reprogram.

Press down on left ends of batteries to remove. If you insert the new batteries within 20 to 30 seconds of removing the old ones, you will not have to reprogram the thermostat. However, if

INSTALL TWO AA ALKALINE BATTERIES AS SHOWN

M1713

IMPORTANT

Although the thermostat has a low battery indicator, replace the batteries once a year to prevent the thermostat and heating/cooling system from shutting down due to lack of battery power.

As a precaution, when leaving home for longer than a month, change batteries before you leave to prevent system from shutting down due to lack of battery power.

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Step 4. Program the Thermostat

After the batteries are installed, the thermostat can be easily programmed in your hand before it is installed on the wall.

If you would prefer to program the thermostat after it is installed on the wall, skip to page 20, and return later to this programming section.

The personal programming chart on pages 12 and 13 may be helpful for planning your program schedule of time and temperature settings for various times of the day.

Four time periods are available during weekdays — WAKE, LEAVE, RETURN, and SLEEP; these periods can be seen individually on the display as you press the Weekday key.

• WAKE is the time period you want the house at a comfortable temperature when you get up and while you get ready for work or school. (This will be a higher temperature during heating season, or a lower temperature during cooling season.)

• LEAVE is the time period you can set for an energy-saving temperature while you are away at work or school. (This will be a lower temperature during heating season, or a higher temperature during cooling season.)

• RETURN is the time period you want the house at a comfortable temperature for activities before bedtime. (Again, higher heat or lower cool.)

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• SLEEP is the time period you can set for an energy-saving temperature while you are sleeping. (Again, lower heat or higher cool. For more comfortable sleeping, some people choose not to raise the cool temperature during the night.)

You will set one schedule for weekdays and another for weekends, because your requirements will probably be different for each. Also, during weekends, only the WAKE and SLEEP time periods are available.

Fill in the times and temperatures you desire for weekdays and weekends. If you decide not to program the thermostat, it will automatically control heating at 68°F (20°C), and cooling at 78°F (26°C), 24 hours a day. Also, you do not need to enter a time and temperature program for all periods if your schedule does not require

it. For example, a house that is occupied during weekdays would only require programs for WAKE and SLEEP.

If no program is entered for the weekends, the thermostat will operate on the weekday SLEEP program all weekend. Before programming, remove the clear plastic overlay covering 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 an error at any time during programming, just press the Run Program key, and continue again at the step where you left off.

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+ 25 hidden pages