Aprilaire 8553 owner manual For Best Performance, Thermostat Operation

110-790B 7/11/01 3:11 PM Page 16

For Best Performance

The Aprilaire Model 8553 thermostat is designed for accurate temperature control and easy operation. The following guidelines should be followed to ensure proper operation of the thermostat:

1.When the thermostat is operating, close the cover to allow for proper air circulation over the temperature sensor.

2.Do not place anything which can give off warm or cool air, such as candles or portable humidifiers, near the thermostat.

3.Although the thermostat is internally equipped to prevent short cycling of the furnace and air conditioner, it is possible to inadvertently override this protection. Do not start, stop, and restart the equipment without allowing a minimum of 2 minutes between heating or cooling cycles.

Thermostat Operation

The Model 8553 is a full-featured thermostat which allows for additional control and operations after basic time and temperature programming is completed. In addition to the programming buttons used to set up all event times and temperatures, additional buttons control the following functions:

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