Aprilaire 8551 - Manual (Page 11)

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.
Thermostat Operation
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:
TEMPERATURE CONTROL
• 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 or INCREASE
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.
– 9 –
110-904 7/11/01 4:29 PM Page 11