Honeywell CT3451 Owner's Manual
  1. Manuals
  2. Brands
  3. Honeywell Manuals
  4. Thermostat
  5. CT3451
  6. Owner's manual

Honeywell CT3451 Owner's Manual

Owner's manual
Hide thumbs
Table of Contents

Advertisement

Quick Links

Programmable Heat and/or Cool
Low Voltage (20 to 30 Vac) Thermostat and Wallplate
Congratulations on the purchase of your new thermostat!
More than 100 years of Honeywell engineering produced
this thermostat that can provide you with a more
comfortable and convenient living environment.
Your new thermostat automatically controls the
temperature in your home, keeping you comfortable
while saving energy when programmed according to
these instructions.
Direct questions about this thermostat to our Web site at
www.honeywell.com/yourhome or call the customer
information line at 1-800-468-1502.
TYPICAL LOCATION OF A MERCURY
SWITCH IN A THERMOSTAT
® U.S. Registered Trademark
Copyright © 2003 Honeywell •

Programmable Thermostat

MERCURY
SWITCH
M10614
•All Rights Reserved
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash. Dispose of it properly.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of an old control.

1 PREPARE FOR INSTALLATION

Check Table 1 to make sure this thermostat is
compatible with your system. If not, return it to the
retailer.
Acquire tools and items, as needed. See Fig. 1.
SCREWDRIVER
WIRE CUTTER/STRIPPER IF NEEDED TO STRIP WIRES
LEVEL, IF NEEDED TO LEVEL
THERMOSTAT FOR APPEARANCE
Fig. 1. Required installation tools/supplies.
CT3451
OWNER'S GUIDE
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL
M20551
69-1620-1

Advertisement

Table of Contents
loading

Related Manuals for Honeywell CT3451

Summary of Contents for Honeywell CT3451

  • Page 1: Programmable Thermostat

    Low Voltage (20 to 30 Vac) Thermostat and Wallplate Acquire tools and items, as needed. See Fig. 1. Congratulations on the purchase of your new thermostat! More than 100 years of Honeywell engineering produced this thermostat that can provide you with a more comfortable and convenient living environment.

  • Page 2: Remove Old Thermostat

    Baseboard electric (120/240 line volt) Multistage heat pumps/multistage equipment Not compatible with any 120/240 volt circuit. Compatible with 2-wire Honeywell zone valves. Isolating relay required for zone valves that have a 3-wire thermostat connection. Replacing Clock WIth C or C1 Clock...

  • Page 3: Mount Wallplate

    Refer to the labels you placed on wires when you removed your old thermostat. The CT3451 Thermostat is powered with 3AA alkaline Match the letter of your old thermostat wire with the batteries and is adaptable to most 18 to 30 Vac heating- terminal of the corresponding letter on your new cooling systems.
  • Page 4 CT3451 PROGRAMMABLE THERMOSTAT THERMOSTAT THERMOSTAT COIL HEAT COOL RELAY DAMPER COOLIING CONTRACTOR COMPRESSOR HEAT COIL CONTACTOR RELAY DAMPER (HOT) (HOT) TRANSFORMER POWER SUPPLY. PROVIDE DISCONNECT MEANS POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD AND OVERLOAD PROTECTION AS REQUIRED. PROTECTION AS REQUIRED.

  • Page 5: Adjust Fan Operation Switch

    CT3451 PROGRAMMABLE THERMOSTAT Swing down the thermostat and press the lower edge of the thermostat onto the wallplate to latch. See Fig. T8002 THERMOSTAT DASHED LINES INDICATE TABS ON BACK OF THERMOSTAT RELAY COOL CHANGEOVER VALVE COMPRESSOR CONTACTOR HEAT CHANGEOVER...

  • Page 6: Customize Your Thermostat

    Setting Heat Cycle Rate (see Table 2 for the cycle rate options and equipment). — Press the key to display the current heat cycle Your Honeywell thermostat comes preset to the most rate setting of 1, 3, 4, 5, 9, or 12 cph. commonly used settings: — Temperature (°F).

  • Page 7: Setting Weekday Program

    CT3451 PROGRAMMABLE THERMOSTAT — Press the key. Current configuration (CC) is NOTE: The heating and cooling program times are the displayed. A typical example is shown, but CC same. Changing your cooling Wake time also varies by model. (This information is for factory changes your heating Wake time.
  • Page 8 CT3451 PROGRAMMABLE THERMOSTAT Setting Saturday and Sunday Programs To set the Saturday program: 1. Wake a. Press Select. Press key to set Wake time. M12625C 2. Leave. a. Press Select. Press key to set Leave time. M20558 b. Press Select. Press key to set Wake temperature.

  • Page 9: Set Fan And System Switches

    CT3451 PROGRAMMABLE THERMOSTAT Setting Indefinite Temperature Hold 4. Sleep a. Press Select. Press key to set Sleep The Hold key allows you to indefinitely hold a time. temperature. When Hold is active, the letters Hld are displayed continuously. Hold can be canceled by pressing the Hold key again.

  • Page 10: System Switch

    CT3451 PROGRAMMABLE THERMOSTAT System Switch with the Fuel switch set to the E position for electric heat, the fan starts immediately. The System switch settings control thermostat Press the key to lower the temperature setting operation as follows: below the room temperature. The heating equipment Cool: The thermostat controls the cooling should shut down.

  • Page 11: Troubleshooting

    CT3451 PROGRAMMABLE THERMOSTAT TROUBLESHOOTING Table 4. Frequently Asked Questions. If ... Then ... Display does not come on. Make sure the batteries are fresh and installed correctly. Temperature display does not go lower than Your thermostat has reached the temperature limit. Be sure the 40°F (4°C) or higher than 99°F (37°C during...

  • Page 12: 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 product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywell’s option) within a reasonable period of time.

Table of Contents