Honeywell CT3451 Owner's Manual - Page 6

CT3451 PROGRAMMABLE THERMOSTAT AA BATTERIES (3) PM TUE AuFtoANOn Hold Select CoolSOYfSf THEeMat - Release the keys to display the three-digit software revision code. (Information displayed varies by model). M12583 - Press the ▲ key. FC (factory configuration) displays. (A typical example is shown, but information displayed varies by model. This information is for factory use only.) M20514 Fig. 13. Installing batteries. ❑ Restore power to the heating/cooling system. 8 CUSTOMIZE YOUR THERMOSTAT Your Honeywell thermostat comes preset to the most commonly used settings: - Temperature (°F). - Gas or oil forced air furnace. - Aggressive algorithm control. M12584A ❑ Setting °C or °F. - Press the ▲ key again to display the current setting. - Press the ▼ key to change the °C or °F indication. ❑ Setting Heat Cycle Rate (see Table 2 for the cycle rate options and equipment). - Press the ▲ key to display the current heat cycle rate setting of 1, 3, 4, 5, 9, or 12 cph. You can change these settings using the instructions that follow. To exit at any time, press the ▲ key until End displays. Setting °F/°C Indication, Heat Cycle Rate, Heating/Cooling Temperature Control The following instructions provide information to change the heating cycle rate to match the heating equipment and to choose either the Fahrenheit (°F) or Celsius (°C) display. NOTE: All four steps must be completed to save changes to the °F/°C indication and the heat cycle rate. ❑ Enter Installer Setup. - Use ▼ or ▲ keys to set the temperature setpoint to 52°F (11°C). M12589A - If the desired cycle rate is displayed, press the ▲ key to display heating and cooling algorithm default. M12588A - To change the heat cycle rate, press the ▼ key until your choice of 1, 3, 4, 5, 6, 9, or 12 is displayed. - Press the ▲ key to display the heating and cooling temperature control algorithm configuration default. SET HT. M12582A - Press ▼ and ▲ keys simultaneously for more than two seconds to enter Installer Setup. M14691 - Press the ▼ key to change the heating and cooling control algorithm to C1 or C3. C1 = Standard control algorithm. C3 = Aggressive control algorithm (Default. Can cause overshooting.) 69-1620-1 6