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Honeywell CT3451 manual

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Table of contents for the manual

  • Page 1

    ® U.S. Regi stered T rademar k Copyright © 2003 Honeywe ll • •All Rights Reserved OWNER’S GUIDE 69-1620-1 CT3451 Programmable Thermostat Programmable Heat and/or C ool Low V oltage (20 to 30 Vac) Thermostat and Wallplate Congrat ulation s on the pur chase of your new t hermost at! More than 100 years of Honeyw ell engin eering pr oduced thi[...]

  • Page 2

    CT3451 PROGRAMMABLE THERMOSTAT 69-1620—1 2 2 REMOVE OLD THERMOSTAT ❑ T est to be sure your heating and a ir conditioning systems (where applicable) are wor king correctly . If not, cont act your local heat ing/air conditi oning deal er . T o avoid comp ressor d amage, do not o perate the cooling system wh en outdoor tempera ture is below 50°F [...]

  • Page 3

    CT3451 PROGRAMMABLE THERMOST AT 3 69-1620—1 3 MOUNT WALLPLATE IMPORTANT Level for appeara nce only . The thermostat func- tions norm ally eve n when not mo unted level . ❑ Position the wallplate o n the wall. Level th e wallplate for appear ance, i f desire d. Use a pe ncil to mar k the two mounting hole s that best fit th e application. See Fi[...]

  • Page 4

    CT3451 PROGRAMMABLE THERMOSTAT 69-1620—1 4 Fig. 6. T ypical heat -cool syste m hookup with single transfor mer . Fig. 7. T ypical heat system hookup w ith 2-wire, he at- only system . Fig. 8. T y pical cool system hookup with 3-wire , cool-only s ystem. Fig. 9. T ypical heat-cool sys tem hookup wit h two transform ers. L1 (HOT) L2 M20510 FAN RELA[...]

  • Page 5

    CT3451 PROGRAMMABLE THERMOST AT 5 69-1620—1 Fig. 10. T ypical single-s tage heat pump syst em hookup. 5 ADJUST FAN OPERATION SWITCH The thermostat fan operation sw itch, labeled fuel switch in Fig. 1 1 , is set at the fa ctory in the F (ga s/oil fuel) position. This is the correct setting for m ost systems. If you have an electr ic heat system, s[...]

  • Page 6

    CT3451 PROGRAMMABLE THERMOSTAT 69-1620—1 6 Fig. 13. Installing batt eries. ❑ Restore power to the heati ng/cool ing syst em. 8 CUSTOMIZE YOUR THERMOSTAT Y our Honeywell t hermostat comes pres et to the most commonly used sett ings: — T emp erature (°F). — Gas or oil forced ai r furnace . — Aggress ive algo rithm cont rol. Y ou can chan g[...]

  • Page 7

    CT3451 PROGRAMMABLE THERMOST AT 7 69-1620—1 — Press the ▲ ke y . Curren t configuration (CC) is displayed. A ty pical example is shown , but CC varies by mode l. (This information is for factor y use only .) ❑ Exit Installer Setup. — Press the ▲ key to save all changes and return to normal op eration. a High e ffici ency furn ace (9 0+)[...]

  • Page 8

    CT3451 PROGRAMMABLE THERMOSTAT 69-1620—1 8 2. Leave. a. P ress Select. Pr ess ▼ or ▲ key to set Leave time. b. P ress Select. Pr ess ▼ or ▲ key to set Leave temperatu re. 3. Return a. Press Select. Press ▼ or ▲ key to set Return time. b. Press Select. Press ▼ or ▲ key to set Return temperatu re. 4. Sleep a. P ress Select. Pr ess ?[...]

  • Page 9

    CT3451 PROGRAMMABLE THERMOST AT 9 69-1620—1 4. Sleep a. P ress Select. Pr ess ▼ or ▲ key to set Sleep time. b. P ress Select. Pr ess ▼ or ▲ key to set Sleep temperatu re. 5. Repeat steps 1-4 in Setting Saturd ay and Sunday Program section to set the Sund ay program. 6. Press Select. End is displayed. Programm ing is complete. The th ermos[...]

  • Page 10

    CT3451 PROGRAMMABLE THERMOSTAT 69-1620—1 1 0 System Switch ❑ The System switch settings contro l thermostat operation as follows: Cool: The ther mostat controls the cooling system. Off: Both heating and cooling are off. Heat: T he thermo stat control s the h eating system. ❑ Slide the System swit ch on the thermo stat to the desired system se[...]

  • Page 11

    CT3451 PROGRAMMABLE THERMOST AT 1 1 69 -1620—1 TROUBLESHOOTING T able 4. Freque ntly Asked Questions . If ... Then ... Display does not co me on. Make sure t he batteri es are fre sh and ins tall ed correct ly . T emperature di splay doe s not go low er than 40°F (4°C) or higher than 99°F (37°C duri ng programming . Y our thermo stat h as rea[...]

  • Page 12

    69-1620—1 J. S. 05-03 www .honeywell.com/yourhome CT3451 PROGRAMMABLE THERMOSTAT Printed in U.S.A. on recycled paper containing at least 10% post-consumer paper fibers. Automation and Control Solu tions Honeywell Honeywell Limit ed-Honeywell Limi tée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55 422 Scarborough, Ont ario M1V 4Z9[...]