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Honeywell CT3500/CT3595
PROGRAMMABLE THERMOSTAT
OWNER’S GUIDE
Weekday, Saturday and Sunday
Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac) Thermostat and Wallplate
Model CT3500/CT3595
Para pedir estas instrucciones en español, llame al 1-800-468-1502.
Pour obtenir ce ode demploi en français, composer le 1-800-468-1502.
Table of Contents
Step 1. Prepare for Installation........................................................................................................................
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Total comfort temperature management with Smart Response™ Technology. Congratulations! You made a smart choice by purchasing your new Honeywell thermostat 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 automatically remembering to adjust the temperature when you l
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DIGITAL DISPLAY RAISES TEMPERATURE SETTING SET CURRENT LOWERS TEMPERATURE DAY/TIME SETTING SETS CURRENT TIME AND DAY DISPLAYS CURRENT HEAT/COOL TEMPERATURE SETTING RUN PROGRAM RETURNS THERMOSTAT Time Set Program PROGRAM PERIODS TO NORMAL Run Set Current Wake Leave Return Sleep WAKE/LEAVE/RETURN/SLEEP: Day/Time Program OPERATING MODE ENTERS PROGRAMMING MODE Heat Off Cool Heat/Cool Hold Temp Day System Settings HOLD TEMP On Auto SETS A HOLD SYSTEM SWITCH Fan SELECTS HEAT/
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DISPLAYS EITHER CURRENT TIME OF DAY OR PROGRAM TIMES SHOWS THERMOSTAT IS IN THE SET DAY/TIME MODE SHOWS WHEN THERMOSTAT IS IN THE PROGRAMMING MODE SHOWS TEMPERATURE SETTING CHANGED FOR THIS PROGRAM PERIOD SHOWS VACATION SHOWS THE TEMPERATURE HOLD DURATION DISPLAYED IS THE CURRENT Set Program Set Day/Time Temporary Setting SET TEMPERATURE Hold for SHOWS CURRENT AM DAY OR DAYS BEING Em Ht Room SHOWS THE TEMPERATURE PROGRAMMED Humid Aux Ht DISPLAYED IS THE CURRENT ROOM TEMPERATURE MonTueWe
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STEP 1. PREPARE FOR INSTALLATION q Check Table 1, the compatibility chart, to make sure the thermostat is compatible with your system. If your system is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502. Table 1. Compatibility Chart. System Type Compatibility with CT3500/CT3595 Gas — Standing Pilot Yes Gas — Electronic Ignition Yes a Gas-fired Boilers Yes b Yes Gas — 750 Millivolt Heat Only a Oil-Fired Boilers Yes Oil-Fired Furnace Yes Electric Furnace Yes Electric Air Con
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STEP 2. REMOVE OLD THERMOSTAT q Test your heating and cooling systems to make sure they work properly. If either system 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). q Turn off power to the system at the furnace or the fuse/circuit breaker panel. q Carefully unpack your new thermostat and wallplate. Save package of screws, instructions, and receipt. q Remove the cov
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Replacing a Thermostat that has Three Wires If you have three wires for a heating only system and can operate the fan using the fan ON switch this thermostat works with your system. However, some hot water (zoned) heating systems also have three wires. Your thermostat will work only if you install an isolating relay on these systems. For details, call your local heating and/or cooling contractor. STEP 3. MOUNT THERMOSTAT WALLPLATE q Separate the wallplate from the thermostat by placing your th
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G Y W R STEP 4. WIRE WALLPLATE TERMINALS IMPORTANT All wiring must comply with local codes and ordinances. If unsure about household wiring procedures, call your local heating/air-conditioning contractor. Refer to the labels you placed on the wires when you removed the old thermostat (see illustration). q Match the letter of your old thermostat wire with the corresponding terminal letter on your new thermostat. Refer to Table 2. q Remove the factory-installed jumper connecting terminals R an
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Table 2. Terminal Designations on Old and New Thermostats. Terminal on Old Thermostat Connect To Description a RPower R, RH , 4, V a Rc Power for cooling Rc, R W, W , H W Heat 1 Y, Y , M Y Cooling 1 G, F G Fan O O Changeover in cool. (Single stage heat pump only). b b Changeover in heat. (Single stage heat pump only). B B c c b Do not connect. Transformer common C , X , B W , H Do not continue installation. Second stage heat. 2 2 Call 1-800-468-1502. Y Second stage cool. 2 a If both RH and R ter
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90 60 80 70 q If the thermostat is already mounted on the wall, remove the thermostat by placing your thumb between the thermostat and wallplate and pulling the thermostat up and away as shown. When the batteries are running low, a REPL BAT message flashes for one to two months before the batteries run out completely. Replace the batteries as soon as possible once the message flashes. IMPORTANT Although the thermostat has a low battery indicator, replace the batteries once per year to prev
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STEP 7. MOUNT THE THERMOSTAT A. ENGAGE TABS AT TOP B. PRESS LOWER OF THERMOSTAT EDGE OF CASE AND WALLPLATE. TO LATCH. M12703A STEP 8. CUSTOMIZE YOUR THERMOSTAT Your Honeywell thermostat comes preset to the most commonly used settings. The settings are: — Gas or oil forced air furnace. — Smart Response technology on. — Temperature °F. — 12-hour clock format. You can change any or all of these settings. IMPORTANT Always press the keys with your fingertip or a similar blunt tool. Sharp instrume
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System Type (Feature Number 4) System type options are: — 1 = Gravity or steam system. — 3 = Hot water, high efficiency furnace (90% or better), or single stage heat pump. — 6 = Gas or oil forced air furnace (preset). — 9 = Electric furnace. To change your system type: q Press until display shows your furnace or boiler type. Run Program q Press Time to move to next feature or to return to main display. Smart Response™ Technology (Feature Number 13) Smart Response technology options are: — 0 =
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Time Format (Feature Number 16) Time format options are: — 0 = 12-hour clock (preset). — 1 = 24-hour clock. M13345 To change time format: q Press once. Run Program q Press to return to main display. Factory Set Function (Feature Number 37) Do not change this setting. M13346 STEP 9. SET THE CLOCK Set Current Day and Time NOTE: On initial power-up, the screen flashes 1:00 pm until you press a key. Set Curent Day/Time qPress . Day q Press until screen shows current day. Set Curent Day/Time q Pre
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STEP 10. PROGRAMMING The keyboard is located behind the thermostat cover. The three most frequently used keys are near the display. Pressing displays the current temperature settings. Pressing the and keys change the temperature. The thermostat displays day, time, program period, temperature and system settings. There is an individual key for each of the four program periods: Wake —The program period when you want the house at a comfortable temperature when you get up and while you get rea
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Table 3. Personal Programming Table. Period Default Setting Weekday (Mon-Fri) Saturday (Sat) Sunday (Sun) Wake Time (6:00AM) a Heat (70°F/21°C) b Cool (78°F/25.5°C) Leave Time (8:00AM) a Heat (62°F/16.5°C) b Cool (85°F/29.5°C) Return Time (6:00PM) a Heat (70°F/21°C) b Cool (78°F/25.5°C) Sleep Time (10:00PM) a Heat (62°F/16.5°C) b Cool (82°F/28°C) a Your heating setpoints cannot be higher than 90°F (32°C) or lower than 40°F (4.5°C). b Your cooling setpoints cannot be higher than 99°F (35°C) or l
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The setpoint temperature range is 40°F to 90°F (5°C to 2°C) for heating and 45°F to 99°F (7°C to 37°C) for cooling. Heat/Cool Settings q Press to switch between heating and cooling setpoints. NOTE: Program times are the same for heating and cooling. q Press or until the display shows the desired temperature setpoint. Leave Return Sleep q Press , or and repeat these steps for each time period. Your weekday is now programmed. Program Saturday and Sunday Repeat each step in Program Weekdays fo
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STEP 11. OPERATING YOUR THERMOSTAT Change Temperature Setting Until the Next Program Period (Temporary Change) q Press or until the screen shows the desired temperature setting. NOTE: The temporary temperature setting is displayed for about 3 seconds and then the room temperature is displayed. Temporary appears in the display. The setting cancels when the next program period starts or Run Program when you press . Change Temperature Setting Indefinitely (Hold) q Move the System switch to the
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STEP 12. SET THE FAN AND SYSTEM SWITCHES First set the fan switch. Fan On: The fan runs continuously. Use for improved air On Auto circulation or for more efficient central air cleaning. (In a heat-only system, fan runs continuously only if fan relay is Fan connected to the G thermostat terminal). Fan Auto: Normal setting for most homes. The equipment On Auto controls the fan operation. Fan Then set the system Heat: The thermostat controls your heating system. Cool Heat Off switch. System Of
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IF YOU HAVE A PROBLEM Table 4. Solution Guide. If... Then… Display does not appear. • Make sure the batteries are fresh and installed correctly. • Make sure the thermostat is mounted and latched on the wallplate. Mount and latch the thermostat on the wallplate if it is not. Temperature settings will not change • Make sure the temperature setpoints are: (example; cannot set the heating higher —40°F to 90°F (4.5°C to 32°C) for heating. or the cooling lower). —45°F to 99°F (7°C to 35°C) for coolin
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Table 4. Solution Guide. If... Then… Cooling does not come on. • Make sure the cooling setpoint is below the room temperature. • Make sure the circuit breaker is not tripped, and reset it if necessary. • Make sure the system switch at the air conditioner is in the On position, and set it to On if it is in the Off position. • Wait five minutes for the system to respond. • Set the system switch to Cool. System on indicator ( = heat, = Wait five minutes after seeing the flame or snowflake and che
