Honeywell CT3550- Manuals

Page 2 - MERCURY NOTICE

69-1284—2 2 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...

Page 5 - STEP 1. PREPARE FOR INSTALLATION; Tools Required; System Type

5 69-1284—2 STEP 1. PREPARE FOR INSTALLATION ❑ 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 Relations Center, toll-free, 1-800-468-1502. Table 1. Compatibility Chart. a Compatible with 2-...

Page 6 - STEP 2. REMOVE OLD THERMOSTAT; Special Installations; Clock thermostat with separate wires for the clock.; Replacing a Clock Thermostat that has C or C1 Clock Terminals

69-1284—2 6 STEP 2. REMOVE OLD THERMOSTAT ❑ 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 ...

Page 7 - Replacing a Thermostat that has Three Wires; STEP 3. MOUNT THERMOSTAT WALLPLATE; Tighten mounting screws.

7 69-1284—2 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 y...

Page 8 - STEP 4. WIRE WALLPLATE TERMINALS; IMPORTANT

69-1284—2 8 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 illust...

Page 9 - Table 2. Terminal Designations on Old and New Thermostats; STEP 5. INSTALL THE BATTERIES; Terminal on Old Thermostat

9 69-1284—2 Table 2. Terminal Designations on Old and New Thermostats a If both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc. b Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B. c Tape off end of t...

Page 10 - STEP 6. MOUNT THE THERMOSTAT

69-1284—2 10 ❑ 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...

Page 11 - STEP 7. CUSTOMIZE YOUR THERMOSTAT

11 69-1284—2 STEP 7. CUSTOMIZE YOUR THERMOSTAT Your Honeywell CT3550 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. IMPOR...

Page 12 - Smart ResponseTM Technology (Feature Number 13)

69-1284—2 12 To change your system type: ❑ Press until display shows your furnace or boiler type. ❑ 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 = Smart Response technology on (preset).— 1 = ...

Page 13 - STEP 8. SET THE CLOCK; Set Current Day and Time

13 69-1284—2 Factory Set Function (Feature Number 37) Do not change this setting. STEP 8. SET THE CLOCK Set Current Day and Time NOTE: On initial power-up, the screen flashes 1:00 pm until you press a key. ❑ Press . ❑ Press until screen shows current day. ❑ Press time or until screen shows current t...

Page 14 - Program Weekdays

69-1284—2 14 Table 3 can be helpful when planning your schedule of time and temperature settings. The thermostat default settings are shown in parentheses ( ). Table 3. Personal Programming Table. a Your heating setpoints cannot be higher than 90°F (32°C) or lower than 40°F (4.5°C). b Your cooling s...

Page 16 - STEP 10. OPERATING YOUR THERMOSTAT; Change Temperature Setting Indefinitely (Hold)

69-1284—2 16 STEP 10. OPERATING YOUR THERMOSTAT Change Temperature Setting Until the Next Program Period (Temporary Change) ❑ 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 dis...

Page 17 - STEP 11. SET THE FAN AND SYSTEM KEY; Set the Fan Key

17 69-1284—2 STEP 11. SET THE FAN AND SYSTEM KEY Set the Fan Key Fan On: The fan runs continuously. Use for improved air circulation or more efficient central air cleaning. (In a heat only system, the fan runs continuously only if the fan relay is connected to the G thermostat terminal). Press until...

Page 18 - If You Have a Problem; Then...

69-1284—2 18 If You Have a Problem Table 4. Solution Guide. If... Then… Display does not appear. • Make sure the batteries are 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 w...

Page 19 - Toll-Free Customer Assistance; Location and number of wires connected to the thermostat.

19 69-1284—2 Toll-Free Customer Assistance Please read and follow the provided instructions for this thermostat. For additional information, go to www.honeywell.com/yourhome or call the Honeywell Customer Relations Center at 1-800-468-1502. The Center hours are Monday through Friday, 7:00AM to 5:30P...

Page 20 - SMART RESPONSETM TECHNOLOGY; The time of day when you want the comfort temperature established.

69-1284—2 20 SMART RESPONSE™ TECHNOLOGY Your CT3550 is actually a small computer. The Smart Response technology calculates the correct time of day to turn on your heating or cooling system. Smart Response technology considers the following information.• Air temperature. • Wall temperature. • The tim...

Page 21 - WIRING DIAGRAMS

21 69-1284—2 WIRING DIAGRAMS THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 1 HEATINGRELAY ORVALVE COIL B R RC O W Y G 2-WIRE HEAT-ONLY (JUMPER INTACT) M10616 M10617 THERMOSTAT 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. 1 4...

Page 23 - Limited One-Year Warranty; Honeywell Limited/Honeywell Limitée

23 69-1284—2 Limited One-Year Warranty Honeywell warrants this product, excluding battery, to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If, at any time during the warranty period, the pr...

Page 24 - Home and Building Control Home and Building Control

Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. 69-1284—2 J.H. Rev. 04-01 www.honeywell.com/yourhome Home and Building Control Home and Building Control Honeywell Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 5...