Aprilaire 8553 owner manual Automatically returns to the original program

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110-790B 7/11/01 3:11 PM Page 23

Day, and Evening events. During the Night event, the fan will automatically revert to cycling on

and off with the heating and cooling equipment.

No. 3 – 4 Minute / 2 Minute Minimum Equipment On/Off Times. This switch is factory preset at

2 minutes. This switch provides short cycle protection for the furnace/air conditioner. If you feel that the furnace/air conditioner turns on and off too many times per hour, ask your contractor about changing the switch to a 4 minute minimum on time. Keep in mind, however, that this may increase the overall temperature variation in the house due to longer run and off times. Do not change the position of the switch without first consulting with your contractor.

No. 4 – Keypad Lock. If tampering with the thermostat is expected and unwanted, the keypad can be locked by moving this switch from the factory-preset OFF position to ON. This should not be done until all programming is finalized. In the locked position only the following functions can be done:

•The outdoor temperature button will display the outdoor temperature.

•The DECREASE button or INCREASE button will temporarily change the set point a maximum of ±6°F (±3°C) for a period of 3 hours, before the thermostat

automatically returns to the original program.

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Contents Model Equipment Control Temperature ControlCooling Energy Star Program Information Cool = 85˚ Heat = 70˚Cool = 78˚ Heat = 62˚Change the flashing symbol to the current day Week Setting Or Changing The Clock110-790B 7/11/01 311 PM Progressive Recovery Setting Or Changing The Program110-790B 7/11/01 311 PM Heat = Cool = Program ScheduleSetting Or Changing Program Times Night Press and release the program button. The DaySetting Or Changing Heating Temperatures Night events Setting Or Changing Cooling TemperaturesRepeat steps 2 and 3 for the Day Evening , and Night events Press and release the Mode button until the wordTo Start Running The Program Reviewing Programmed Time Schedules Temperature SettingsThermostat Operation For Best PerformanceAprilaire Model Day Programmable Thermostat Return to the program Temperature ControlTime Control Equipment Control Time during sub-freezing temperatures Optional Settings For Additional Thermostat Features Automatically returns to the original program Installing contractor Following procedure must beFigure 1 carefully followed See Figure Place the cover On the base by lining up Turn the thermostat power back on Case Of Power Failure Cleaning Limited Warranty BOX 1467 MADISON, WI
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