Honeywell CT3400, CT3455 User Manual

INSTRUCTIONS

69-0733-3

PROGRAMMING AND INSTALLATION

Honeywell/34

Model CT3400/CT3455

Low Voltage (20 to 30 Vac)Thermostat and Wallplate

Programmable Heat and/or Cool

Weekday/Saturday/Sunday

TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA

Savings for Once-A-Day 10°F (5°C) decrease

30% 28% 26% 24% 22% 20% 18% 16% 14% 12% 10%

8% 6%

Approximate percentage of energy cost savings

4% 2%

Minneapolis St. Paul Montreal Ottawa Toronto

Edmonton Regina Winnipeg

Calgary

Halifax Vancouver Denver Moncton North Bay Quebec St. John's

Buffalo Cleveland Milwaukee

Savings for Twice-A-Day 10°F (5°C) decrease*

Cincinnati Kansas City St. Louis Columbus

New York Philadelphia Seattle

Boston Chicago

Des Moines 

Detroit

Omaha

Pittsburgh

Salt Lake

Indianapolis

City

*Based on 10°F (5°C) decrease—(5°F [3°C] decrease gives approximately 55 percent of these savings).

Savings for 5°F (3°) summer increase 

Louisville

San 

Portland

Francisco

Wash., D C

Dallas Atlanta

Los Angeles

THERMOST AT PROGRAMMABLE

San Diego

M2416A

J.S. Rev. 4-97 ©Honeywell Inc. 1997 Printed in U.S.A. Form Number 69-0733—3

TOTAL COMFORT TEMPERATURE MANAGEMENT WITH ADAPTIVE INTELLIGENT RECOVERY™

Congratulations! You made a smart choice when you purchased your new Honeywell Thermostat. It’s the smart thermostat that:

■

Keeps you comfortable

tioning should go on to have the house at the desired comfort temperature by the time you wake up or return home.

■

Saves the maximum amount of energy and money

the heat or air conditioning when you leave home or go to sleep.

■

Provides the ultimate in comfort and convenience

your choice—use the preprogrammed schedule or set your own.

We invite you to spend a few minutes reading this manual. You’ll find it answers many of the questions that will arise as you become familiar and comfortable with your Honeywell thermostat, the state of the art in home comfort controls.

M3375

Recycling Thermostat

If this thermostat is replacing a control that contains mercury in a sealed tube, do place your old control in the trash. Contact your local waste management authority for instructions regarding recycling and the proper disposal of this control, or of an old control containing mercury in a sealed tube.

by automatically calculating exactly when the furnace or air condi-

by remembering to automatically adjust

. It comes already programmed, so it’s

not

MERCURY SWITCH

If you have questions, call Honeywell Inc. at 1-800-468-1502.

M3701

Fig. 1. Typical location of a mercury

switch in a thermostat.

Table Of Contents

STEP 1 Prepare For Installation.................................................................................................... 2

STEP 2 Remove Old Thermostat .................................................................................................. 4

STEP 3 Before You Program ......................................................................................................... 6

Install the Batteries.................................................................................................................... 6

Adaptive Intelligent Recovery™ Selection ............................................................................. 7

STEP 4 Program The Thermostat ................................................................................................. 9

STEP 5 Mount Thermostat Wallplate.......................................................................................... 16

STEP 6 Adjust System On-Time, Clock Display, as Required ................................................ 18

STEP 7 Adjust Fan Operation Switch, as Required.................................................................. 20

STEP 8 Wire Wallplate Terminals ............................................................................................... 21

STEP 9 Mount The Thermostat ................................................................................................... 24

STEP 10 Check Thermostat Operation After Programming and Installing ........................... 25

STEP 11 Set the Fan and System Switches .............................................................................. 28

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

Index............................................................................................................................................... 34

Limited One-Year Warranty ......................................................................................................... 36

1 69-0733—3

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 Honeywell Customer Assistance, toll-free 1-800-468-1502.

Table 1. Compatibility Chart.

System Type Compatible with CT3400/3455

Gas—Standing Pilot Yes Gas—Electronic Ignition Yes Gas-Fired Boilers Yes

Gas—Millivolt No

Oil-Fired Boilers Yes Oil-Fired Furnace Yes Electric Furnace Yes Electric Air Conditioning Yes

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 and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White Rodgers no. 1361 valves.

2 69-0733—3

■■ Acquire tools and items as needed (below).

WIRES THROUGH WALL OPENING

M5136

CROSS-RECESSED SCREWDRIVER

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

LEVEL, IF NEEDED, TO LEVEL THERMOSTAT FOR APPEARANCE

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

wallplate; save package of screws, instructions

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

3 69-0733—3

■■ Disconnect wires from old thermostat or

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. Wrap wires around pencil to keep them from falling back into the wall, as shown.

and receipt.

■■ Remove the cover from the 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 sub-

base, wallplate or wall, and lift away.

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 Chronotherm

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

Thermostat wiring wallplate. Do

M878B

4 69-0733—3

not allow them to touch, or you can damage your transformer. Disconnect the wires and wrap them separately using electrical tape;

wrap them together

. Place the wires where they

do not

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

STEP 3 Before You Program

which programmable thermostats will work with your system, call Honeywell Customer Assistance at 1-800-468-1502.

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 Honeywell Customer Assistance at 1-800-468-1502.

5 69-0733—3

Install the Batteries

IMPORTANT:

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

■■ Install the batteries in back of the thermostat

as shown, making sure positive (+) terminals all face toward the right.

As the batteries are running low, a REPL BAT 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.

Three AA alkaline batteries are

If you insert new batteries within 20 to 30 seconds of removing the old ones, you will not have to reprogram the thermostat. However, if the display is blank, the batteries are dead or incorrectly installed. In this case, you will have to reprogram. See pages 13 through 15 to reprogram. If you do not reprogram, the factory-preprogrammed

BACK OF THERMOSTAT

settings will be in effect, as shown in chart on pages 11 and 12.

INSTALL 3 AA ALKALINE BATTERIES AS SHOWN,  POSITIVE (+) TERMINALS TOWARD RIGHT. 

6 69-0733—3

M2589

IMPORTANT:



SET PT

TUE

DAYTIME

INDICATES  THERMOSTAT IS SET FOR  CONVENTIONAL RECOVERY

M2483

Although the thermostat has a low battery indicator, replace the batteries once a year to prevent leakage and 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.

Use fresh alkaline batteries; nonalkaline batteries do not last as long, and may leak, causing damage to the thermostat or the wall surface. We recommend Energizer

batteries.

More about Adaptive Intelligent Recovery™…

Adaptive Intelligent Recovery™ Selection

Before you program your thermostat, you must decide if you want to leave the thermostat at the factory-set Adaptive Intelligent Recovery™ setting, or adjust it to conventional recovery. If you choose conventional recovery, adjust screw 3A (on the back of the thermostat) by turning one turn.

With Adaptive Intelligent Recovery™, your home gradually reaches the comfort temperature you set at the exact time programmed into the thermostat to achieve maximum energy savings and comfort.

7 69-0733—3

out

This thermostat is actually a small but powerful computer. When calculating the exact time to turn on your furnace or air conditioner, it considers: (1) air temperature, (2) the temperature of the wall and (3) when you want the comfort temperature established.

During recovery, the thermostat increases the control temperature gradually and turns the equipment on and off several times

before

reaching your comfort time to save energy by avoiding overshooting the comfort temperature. You can see the current control temperature anytime during recovery by pressing the CURRENT SETTING key.

This smart control learns from experience. Each day it checks how closely it hit the target and adjusts the recovery start time accordingly. It normally takes

four to eight days after installation

for the thermostat to adjust to the weather, your lifestyle, home construction and heating/cooling system.

With conventional recovery, the programmed time marks the start of the time your furnace or air conditioner comes on to start recovery; therefore, you should program the start time to be earlier than the desired comfort time. The best starting time varies as the seasons change, but 30 minutes is a good head start time to use.

NOTE: If you adjust screw

3A for conventional recovery, a ■■ indicator appears in the lower right corner of the thermostat display as a reminder that you are no longer using the Adaptive Intelligent Recovery™ feature.

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