Thermostat Operation; Temperature Control - Aprilaire 8551 Owner's Manual

5-2 day programmable thermostat

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110-904

7/11/01

2. Do not place anything which can give off warm or cool air, such as candles, lamps, or portable

humidifiers, near the thermostat.

3. Although the thermostat is internally equipped to prevent short cycling of the 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 cooling cycles.

The Model 8551 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:

• Reading the Actual Room Temperature: The Model 8551 normally displays the room temperature,

not the set-point temperature.

• Check the Set-Point Temperature: Press and release the DECREASE

button. The thermostat will display the programmed set-point temperature and a thermometer for

5 seconds before automatically returning to the actual room temperature display.

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Thermostat Operation

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button or INCREASE

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