PROGRAMMABLE THERMOSTAT Weekday/Saturday/Sunday Programmable Heat and/or Cool Thermostat and Wallplate Model CT3400 Honeywell/34 PROGRAMMING AND INSTALLATION INSTRUCTIONS Rev. 5-94 Printed in U.S. 69-0733B--1 TOTAL COMFORT TEMPERATURE MANAGEMENT WITH ADAPTIVE INTELLIGENT RECOVERYTM Congratulations! You made a smart choice when you purchased your new Honeywell Thermostat. It's the smart thermostat that: Keeps you comfortable by automatically calculating exactly when the furnace or air conditioning 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 by remembering to automatically adjust the heat or air conditioning when you leave home or go to sleep. Provides the ultimate in comfort and convenience. It comes already programmed, so it's 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. 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 RecoveryTM Selection .............................................................................. 7 STEP 4 Program The Thermostat .................................................................................................. 9 STEP 5 Mount Thermostat Wallplate ........................................................................................... 16 STEP 6 Adjust System On-Length, 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 .................................................................................................... 25 STEP 10 Check Thermostat Operation After Programming and Installing ............................. 26 STEP 11 Set the Fan and System Switches ................................................................................ 29 Troubleshooting Guide ................................................................................................................. 30 Index ............................................................................................................................................... 34 Limited One-Year Warranty .......................................................................................................... 36 1 69-0733B--1 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 Gas--Standing Pilot Yes Gas--Electronic Ignition Yes 1 Gas-Fired Boilers Yes Gas--Millivolt No 1 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. 1 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 69-0733B--1 Acquire tools and items as needed (below). 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 MASKING TAPE, IF NEEDED, TO LABEL WIRES AS DISCONNECTED FROM OLD THERMOSTAT LEVEL, IF NEEDED, TO LEVEL THERMOSTAT FOR APPEARANCE M878B 3 69-0733B--1 STEP 2 Remove Old Thermostat 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 WIRES THROUGH from falling back into WALL OPENING the wall, as shown. One or two extra wires? M5136 If you are replacing a ® Honeywell Chronotherm Thermostat, you may find one or two wires that go to the clock terminals on the Chronotherm thermostat wiring wallplate. Do not allow them to touch, or you can damage your transformer. Disconnect the wires 4 69-0733B--1 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 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 subbase, wallplate or wall, and lift away. 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. 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. 5 69-0733B--1 STEP 3 Before You Program 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-preproBACK OF THERMOSTAT grammed settings will be in effect, as shown in chart on pages 11 and 12. M8388 Install the Batteries IMPORTANT: Three AA alkaline batteries are 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. INSTALL 3 AA ALKALINE BATTERIES AS SHOWN, POSITIVE (+) TERMINALS TOWARD RIGHT. 6 69-0733B--1 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. When leaving home for longer than a month, as a precaution, change batteries before you leave to prevent system from shutting down due to lack of battery power. Use fresh alkaline batteries; nonalkaline batteries will not last as long. We recommend Energizer® batteries. the factory-set Adaptive Intelligent RecoveryTM setting, or adjust it to conventional recovery. If you choose conventional recovery, adjust screw 3A (on the back of the thermostat) by turning OUT one turn. With Adaptive Intelligent RecoveryTM, your home will reach the comfort temperature gradually to be at the temperature you set at the exact time programmed into the thermostat. Maximum energy savings and comfort will be achieved. More about Adaptive Intelligent RecoveryTM... 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. 7 69-0733B--1 Adaptive Intelligent RecoveryTM Selection Before you program your thermostat, you must decide if you want to leave the thermostat at 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 will mark 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 will vary 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 will appear in the lower right corner of the thermostat display as a reminder that you are no longer using the PM TUE Adaptive Intelligent DAYTIME RecoveryTM feature. SET PT INDICATES THERMOSTAT IS SET FOR CONVENTIONAL RECOVERY M2483 8 69-0733B--1 STEP 4 Program The Thermostat MORNING is the time period you want the house at a comfortable temperature, after you get up, while you get ready for work or school. (This will be a higher temperature during heating season, or a lower temperature during cooling season.) DAYTIME 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.) EVENING is the time period you want the house at a comfortable temperature for activities before bedtime. (Again, higher heat or lower cool.) 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 16, and return later to this programming section. The following personal programming chart (pages 11 and 12) may be helpful when planning your program schedule of time and temperature settings for various times of the day. Four time periods are available--MORNING, DAYTIME, EVENING and NIGHT. Each period has its own setting key. 9 69-0733B--1 NIGHT is the time period you can set for an energy-saving temperature while you are sleeping. (Again, lower heat or higher cool. Although for more comfortable sleeping, some people choose not to raise the cool temperature during the night.) You will set one schedule for weekdays, one for Saturday, and another for Sunday, because your requirements will probably be different for each. Fill in the times and temperatures you desire for weekdays, Saturday, Sunday. The factory-preprogrammed time and temperature settings are shown in parentheses. If you decide not to program the thermostat, it will automatically control to these settings. The thermostat requires a time and temperature program for the MORNING period. You can program DAYTIME and EVENING, or leave them blank. You can also change NIGHT or cancel it (see page 15), as you please. 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. Use of sharp fingernails or pencil points may damage the keypad. If at any time during programming you make an error, just press the RUN PROGRAM key, and continue again at the step where you left off. PROGRAMMING 10 69-0733B--1 Personal Programming Chart Weekday Program START TIME (6:00 AM) _____________________ PERIOD MORNING DAYTIME EVENING NIGHT HEATING 1 TEMPERATURE (70° F [21° C]) _____________________ COOLING 1 TEMPERATURE (78° F [26° C]) _____________________ ______________ ______________ (10:00 PM) ____________ ...