Setting or changing the clock, Important: read all instructions thoroughly – Aprilaire 8553 User Manual
Page 5
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IMPORTANT: READ ALL INSTRUCTIONS THOROUGHLY
Programming your Aprilaire Thermostat is done in three easy steps: setting the clock, setting the event
times, and setting your desired temperatures.
Setting Or Changing The Clock
Step 1: Press the CLOCK button and “Mo”
(or another day of the week) will flash. Use the
DECREASE
or INCREASE
button to
change the flashing symbol to the current day
of week.
110-790B 7/11/01 3:11 PM Page 5
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