Honeywell CT3500 - Manuals

7 69-1199—4 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...

69-1199—4 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...

9 69-1199—4 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 ...

69-1199—4 10 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...

69-1199—4 12 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...

13 69-1199—4 Time Format (Feature Number 16) Time format options are:— 0 = 12-hour clock (preset).— 1 = 24-hour clock. To change time format: q Press once. q Press to return to main display. Factory Set Function (Feature Number 37) Do not change this setting. STEP 9. SET THE CLOCK Set Current Day an...

15 69-1199—4 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 setpoints cannot be higher than 99°F (35°C) or lower than 45°F (7°C). Program Weekdays Start by programming the wake time and temperature for weekda...

17 69-1199—4 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 dis...

69-1199—4 18 STEP 12. SET THE FAN AND SYSTEM SWITCHES First set the fan switch. Fan On: The fan runs continuously. Use for improved air circulation or for more efficient central air cleaning. (In a heat-only system, fan runs continuously only if fan relay is connected to the G thermostat terminal).F...

19 69-1199—4 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 ...

69-1199—4 20 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 Honeywell Customer Care at 1-800-468-1502. Before calling, please have the following information available:• Thermosta...

21 69-1199—4 SMART RESPONSE™ TECHNOLOGY Your thermostat 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...

69-1199—4 22 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...

69-1199—4 J.S. Rev. 10-04 www.honeywell.com/yourhome Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Scarborough, OntarioM1V 4Z9 Limited One-Year Warranty Honeywell warrants this produ...