Aprilaire 8556 owner manual 110-791B 7/12/01 858 AM

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110-791B 7/12/01 8:58 AM Page 21

display, which flickers when the furnace is running. Your thermostat will automatically turn on and

off any additional stages of heating as required.

•Automatic Heating and Cooling: This mode can be useful during times of the year and in climates when it is cool at night requiring heating but warm in the afternoon requiring cooling. Press and release the MODE button until the word "AUTO" appears on the display. In this mode the furnace/air conditioner will maintain temperature according to the programming previously completed unless

an override temperature has been entered. The furnace/air conditioner will operate in either the

heating or cooling mode depending on which programmed set point is closest to the room

temperature. Note that both the Snowflake “

“ and Flame “ “ icons are on the display. The

Snowflake will flash or the Flame will flicker depending on which mode the furnace/air conditioner

is operating in.

•Turning the System Off: Press the MODE button until the word "OFF" appears on the display. In this mode the furnace/air conditioner will not operate regardless of the temperature. The thermostat can still be programmed, the optional outdoor temperature sensor will work and the fan will turn on if the FAN button is pressed. To avoid frozen water pipes, DO NOT use the OFF mode for long periods of time during sub-freezing temperatures.

NOTE: After selecting a new mode, the thermostat initiates a delay of up to 4 minutes to protect the heating and cooling equipment.

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Contents Model Temperature Control CoolingEquipment Control Energy Star Program Information Cool = 78˚ Heat = 70˚Heat = 62˚ Cool = 85˚Change the flashing symbol to the current day Week Setting Or Changing The Clock110-791B 7/12/01 857 AM Progressive Recovery Setting Or Changing The Program110-791B 7/12/01 857 AM Heat = Cool = Program ScheduleSetting Or Changing Program Times Night Press and release the program button. The DaySetting Or Changing Heating Temperatures Setting Or Changing Cooling Temperatures Press and release the Mode button until the word To Start Running The Program Reviewing Programmed Time Schedules Temperature SettingsThermostat Operation For Best Performance110-791B 7/12/01 858 AM Return to the program Temperature ControlTime Control Equipment Control 110-791B 7/12/01 858 AM Optional Settings For Additional Thermostat Features 110-791B 7/12/01 858 AM 110-791B 7/12/01 858 AM Following procedure must beFigure 1 carefully followed See Figure Place ThermostatTurn the thermostat power back on Case Of Power Failure Using The Available LED IndicatorsCleaning Limited Warranty BOX 1467 MADISON, WI
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