Owner's Manual
Page 2
... temperature setting. • Large digital display. Batteries are held permanently in an effort to provide you to use. Over 100 years of Honeywell engineering expertise went into the making of your temperature settings are not required because your new thermostat! The ▲ and ▼ ...keys make it easy for batteries. Congratulations on the purchase of this thermostat in memory. 69-1490 2
... temperature setting. • Large digital display. Batteries are held permanently in an effort to provide you to use. Over 100 years of Honeywell engineering expertise went into the making of your temperature settings are not required because your new thermostat! The ▲ and ▼ ...keys make it easy for batteries. Congratulations on the purchase of this thermostat in memory. 69-1490 2
Installation Instructions
Page 4
... If cool is displayed in the Off position. if heat is 40° to 99°F (5° to 37°C). Press the st keys simultaneously for approxi-mately five seconds as follows: Cool: The thermostat controls the cooling system. T8400C AND T8401C ELECTRONIC THERMOSTATS Slide the FAN .... Off: Both heating and cooling are released, a two-digit software revision code is off , t turns it on display and to enter installer setup mode. Heat: The thermostat controls the heating system. To increase the temperature setpoint press the s key. To decrease the temperature setpoint press the t...
... If cool is displayed in the Off position. if heat is 40° to 99°F (5° to 37°C). Press the st keys simultaneously for approxi-mately five seconds as follows: Cool: The thermostat controls the cooling system. T8400C AND T8401C ELECTRONIC THERMOSTATS Slide the FAN .... Off: Both heating and cooling are released, a two-digit software revision code is off , t turns it on display and to enter installer setup mode. Heat: The thermostat controls the heating system. To increase the temperature setpoint press the s key. To decrease the temperature setpoint press the t...
Installation Instructions
Page 5
... damage. If the desired cycle is displayed. Heating Cycle Rates. bRefer to manufacturer's recommendations. 1. Press the s key again to change the setpoint to normal operation. When using an electric heat thermostat, the fan starts and stops with the...display cooling algorithm configuration default. M14690 Table 1. Press and hold the s key to lower the temperature setting several degrees above the room temperature. Press the t key to raise the temperature setting several degrees below the room temperature. Press the s key. T8400C AND T8401C ELECTRONIC THERMOSTATS...
... damage. If the desired cycle is displayed. Heating Cycle Rates. bRefer to manufacturer's recommendations. 1. Press the s key again to change the setpoint to normal operation. When using an electric heat thermostat, the fan starts and stops with the...display cooling algorithm configuration default. M14690 Table 1. Press and hold the s key to lower the temperature setting several degrees above the room temperature. Press the t key to raise the temperature setting several degrees below the room temperature. Press the s key. T8400C AND T8401C ELECTRONIC THERMOSTATS...
