Aprilaire 8556 owner manual 110-791B 7/12/01 857 AM

Models: 8556

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110-791B 7/12/01 8:57 AM Page 6

Step 2: Press the CLOCK button again and “12:” (hours)

and AM or PM will flash. Use the DECREASE or

INCREASE button to change the flashing symbol to the current hour making sure the hour has the proper AM or PM designation.

Step 3: Press the CLOCK button and “:00” (minutes) will

flash. Use the DECREASE or INCREASE button to change the flashing symbol to the current minute.

Step 4: Press the CLOCK button again. The clock is now set and the current time appears on the display.

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Aprilaire 8556 owner manual 110-791B 7/12/01 857 AM