Aprilaire Thermostat 8552 User Manual

®
ELECTRONIC THERMOSTAT  
Owners Manual  
MODEL 8552  
5-2 Day Programmable  
Thermostat  
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®
Energy Star Program Information  
About half of all energy used by households goes to heating and cooling the  
home. By selecting a programmable Aprilaire® Electronic Thermostat, you  
have made a significant step toward conserving energy usage and costs,  
while improving your indoor comfort.  
In fact, the Aprilaire Electronic Thermostat Model 8552 has earned the “Energy Star®” designation  
of the U.S. Environmental Protection Agency (EPA). This means that your Aprilaire Thermostat is a  
highly efficient, cutting edge product that is good for the environment. It saves energy and costs less  
to operate than similar products that do not qualify for the Energy Star label.  
Energy Star products help you differentiate between standard efficiency and high efficiency products.  
By using Energy Star products you are helping to prevent air pollution while saving money on your  
utility bills.  
According to the EPA, taking advantage of the times that a home is unoccupied or the occupants  
are asleep, an Energy Star thermostat can reduce heating and cooling bills by as much as 30%. The  
Aprilaire Thermostat has programmable capabilities that allow you full flexibility to set your heating  
and cooling systems to meet your comfort and energy needs. As an Energy Star partner, Research  
Products has determined that this product meets the Energy Star guidelines for energy efficiency.  
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As part of the Energy Star program, your thermostat has been programmed with the following times and  
temperatures. This has been done to achieve energy efficiency and lower energy bills. If you need to  
modify your program schedule, see page 6.  
TIME SCHEDULE  
THERMOSTAT  
SYMBOL  
DESIRED  
TEMPERATURE  
SETTING  
EVENT  
Mon Tue Wed Thu  
Fri  
Sat Sun  
Morning  
Heat = 70˚  
Cool = 78˚  
6:00 6:00 6:00 6:00 6:00 6:00 6:00  
am am am am am am am  
Day  
Evening  
Night  
Heat = 62˚  
Cool = 85˚  
8:00 8:00 8:00 8:00 8:00 8:00 8:00  
am am am am am am am  
Heat = 70˚  
Cool = 78˚  
5:00 5:00 5:00 5:00 5:00 5:00 5:00  
pm pm pm pm pm pm pm  
Heat = 62˚  
Cool = 82˚  
10:00 10:00 10:00 10:00 10:00 10:00 10:00  
pm pm pm pm pm pm pm  
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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 DST button and “  
“ will appear in the  
lower right-hand corner of the display.  
Step 2: 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.  
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Step 3: 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 4: 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 5: Press the CLOCK button again. The clock is now  
set and the current time appears on the display.  
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Setting Or Changing The  
Weekday Program For Heating Mode  
Programming your Aprilaire Electronic Thermostat involves selecting the temperature you want  
in your home and selecting the time you want it to be that temperature. Your Aprilaire Thermostat  
will allow a maximum of 4 time schedules per day. Each time schedule is known as an “event.The  
Morning event is typically when you wake up and is the first event of the day. The Day event is typically  
set when you leave for work. The Evening event is typically set when you come home from work and  
the Night event is set when you go to bed. Each event will have 2 temperatures, 1 heating temperature  
and 1 cooling temperature. The cooling temperature must be at least 2 degrees higher than the heating  
temperature. Your Aprilaire Thermostat allows 1 program for Monday through Friday and 1 program for  
Saturday and Sunday. Complete the chart on page 6 with your desired temperatures and time schedules  
before beginning programming:  
NOTE: It will take some time for your heating or cooling system to reach the desired temperature  
when returning from a setback. Therefore, it is suggested you set your program time before the actual  
time you want your home to reach the desired temperature. For example, if you get up at 7:00 AM and  
have a 6 degree setback, set your Morning event at 6:00 AM to be sure the desired temperature is  
reached by 7:00 AM.  
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PROGRAM SCHEDULE  
TIME SCHEDULE  
THERMOSTAT  
SYMBOL  
DESIRED  
TEMPERATURE  
SETTING  
MONDAY – SATURDAY &  
FRIDAY SUNDAY  
EVENT  
Morning  
Heat =  
Cool =  
Day  
Evening  
Night  
Heat =  
Cool =  
Heat =  
Cool =  
Heat =  
Cool =  
NOTE: While programming you must press a button at least every 15 seconds or the thermostat will revert back to the  
operational mode. If this happens, simply repeatedly press the PROGRAM button until you get back to where you left  
off. The information you have already entered has been retained.  
NOTE: If consecutive events have the same temperature, you can skip an event by simultaneously pressing the  
PROGRAM and MODE buttons. Press and release the PROGRAM button to advance to the next event.  
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Step 1: Press and release the MODE button until the word  
HEAT” and the “ ” heating symbol appear on the display.  
Step 2: Press and release
PROGRAM button – “Mo T
We Th Fr”; Morning event  
symbol “  
flashing “12:” (or some  
other hour); and flashing “AM” or “PM” will appear on the  
display. You are now setting the time you want your heating  
or cooling equipment to come on in the morning.  
Step 3: Press the DECREASE  
button or INCREASE  
” even
button to set the desired hour for the Morning “  
Step 4: Press and release the PROGRAM button – “:00”  
(or some other minutes) will flash.  
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Step 5: Press the DECREASE  
button or INCREASE  
button to set the desired minutes for the Morning “  
event (program starting times are set in ten-minute  
increments).  
Step 6: Press and release the PROGRAM button – the current  
heating temperature will begin to flash. You are now setting  
the heating temperature you desire in the morning.  
Step 7: Press the DECREASE  
button or INCREASE  
” event.  
button to set the desired heating temperature for the Morning “  
Step 8: Press and release the PROGRAM button – the Day “  
” event symbol will appear. You are  
now setting the time and heating temperature you want throughout the day.  
Step 9: Repeat steps 2-6 to complete programming for the Day “  
Step 10: Press and release the PROGRAM button – the Evening “  
” event.  
” event symbol will appear.  
You are now setting the time and heating temperature you want during the evening.  
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Step 11: Repeat steps 2-6 to complete programming for the Evening “  
” event.  
Step 12: Press and release the PROGRAM button – the Night “ ” event symbol will appear.  
You are now setting the time and heating temperature you want at night.  
Step 13: Repeat steps 2-6 to complete programming for the Night “ ” event.  
Setting Or Changing The  
Weekend Program For Heating Mode  
Step 1: After setting the Night “ ” event Weekday program, press and release the PROGRAM button.  
Sa Su”; the Morning “  
” event symbol; flashing  
12:” (or some other hour); and flashing “AM” or “PM” will  
appear on the display. You are now programming the time  
and temperatures for the weekend.  
Step 2: Repeat steps 2-6 identical to Weekday  
programming for Morning “  
Evening “ ”, and Night “ ” events for  
heating mode as applicable.  
”, Day “  
”,  
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Setting 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.  
NOTE: Your event starting times are the same in the cooling mode program as the heating mode start  
times. Example: