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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: If you are currently in Daylight Saving Time
(first Sunday in April thru fourth Sunday in October),
press the DSTbutton and “ “ will appear in the
lower right-hand corner of the display.
Step 2: Press the CLOCKbutton 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.
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