Aprilaire 8556 owner manual Time Control

110-791B 7/12/01 8:58 AM Page 19

•Returning to Programmed Operation: At any time, press the RESUME button to return the thermostat to operate as programmed.

•Change Between °C and °F : The thermostat has the capability of displaying either Celsius or Fahrenheit temperatures. If the displayed temperature seems abnormally high or low

(ie: 70˚F = 21˚C) you may need to switch to ˚C or ˚F by simultaneously pressing the

DECREASE button and the INCREASE button.

•Checking the Outdoor Temperature: If your thermostat was installed with the optional Aprilaire Outdoor Temperature Sensor, simply press the OUTDOOR button and the thermostat will display the outdoor temperature for 5 seconds before automatically returning to the actual room temperature display.

TIME CONTROL

•Change From 12- to 24-Hour Clock: Press and release the CLOCK button, then press the MODE button. To return to a standard clock, repeat the process.

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