Aprilaire 8553 - Manual (Page 13)

Step 4: Repeat steps 2 and 3 for the Day “ ”, Evening “ ”, and Night “ ” events.
NOTE: If thermostat is set for 2 events per day, only the Day “ ” and Night “ ” events can be programmed.
Setting Or Changing Cooling Temperatures
NOTE: Cooling temperatures must be set at least 2 degrees
higher than heating temperatures. (Example: If heating
temperature is set at 70˚F, cooling temperature must be set to at
least 72˚F or higher.) If not set at least 2 degrees higher, the
thermostat will automatically lower the previously programmed
heating temperature to maintain the 2 degree separation.
– 11 –
110-790B 7/11/01 3:11 PM Page 13