Aprilaire 8555 User Manual
O wner’s Manu al
MODEL 8555
7 Day Programmable
Thermostat
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ELE CTR ONIC THERMO S T A T
®
OWNER’S MANUAL – TABLE OF CONTENTS
ENERGY STAR®Program Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Setting Or Changing The Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Setting Or Changing The Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Progressive Recovery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Program Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Setting Or Changing Program Times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting Or Changing Program Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
• Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Reviewing Programmed Time Schedules And Temperature Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
To Start Running The Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
For Best Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
• Temperature Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
• Time Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
• Equipment Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Optional Settings For Additional Thermostat Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting High And Low Balance Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Using Available LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
In Case Of Power Failure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
© Research Products Corporation 2001
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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 8555 has earned the E
NERGY 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 E
NERGY STAR label.
E
NERGY STAR products help you differentiate between standard efficiency and high efficiency products.
By using E
NERGY 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 E
NERGY 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 E
NERGY STAR partner, Research
Products has determined that this product meets the E
NERGY 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 7.
TIME SCHEDULE
THERMOSTAT DESIRED
EVENT SYMBOL TEMPERATURE Mon Tue Wed Thu Fri Sat Sun
SETTING
Morning Heat = 70˚ 6:00 6:00 6:00 6:00 6:00 6:00 6:00
Cool = 78˚
am am am am am am am
Day Heat = 62˚ 8:00 8:00 8:00 8:00 8:00 8:00 8:00
Cool = 85˚
am am am am am am am
Evening Heat = 70˚ 5:00 5:00 5:00 5:00 5:00 5:00 5:00
Cool = 78˚
pm pm pm pm pm pm pm
Night Heat = 62˚ 10:00 10:00 10:00 10:00 10:00 10:00 10:00
Cool = 82˚
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: 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 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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Setting Or Changing The Program
Programming your AprilaireElectronic 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 Dayevent 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 a different program for each day of the week. Complete the chart on
page 7 with your desired temperatures and time schedules before beginning programming.
Progressive Recovery
Your Aprilaire Thermostat is equipped with a programming feature called “Progressive Recovery.”
This feature assures that your house will economically achieve the desired comfort temperature at
the programmed time when returning from an economy or setback temperature. For example, if you
like a wake-up temperature of 68°F at 6:00 AM from a setback of 65°F it is not necessary to set the
morning program for 5:00 AM. The thermostat will automatically start warming your house in advance
so your comfort temperature is reached on time. The progressive recovery feature must be activated
in order to work.
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To activate the progressive recovery
mode simultaneously press the
PROGRAM and FAN buttons. A small
thermostat icon, “ “, will appear
under the clock. Once in this mode
proceed with programming your
thermostat remembering to use exact
times for each event time change.
NOTE: If not using Progressive Recovery, 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.
NOTE: This thermostat can be programmed with either 2 events per day (day and night) or 4 events per day (morning,
day, evening, and night). Before programming the thermostat, decide which setting is best for your personal schedule.
The thermostat is factory preset for 4 events per day. To change to two events per day, refer to page 20 “Optional
Settings for Additional Thermostat Features,” or contact your contractor for assistance.
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PROGRAM SCHEDULE
TIME SCHEDULE
THERMOSTAT DESIRED
EVENT SYMBOL TEMPERATURE Mon Tue Wed Thu Fri Sat Sun
SETTING
Morning Heat =
Cool =
Day Heat =
Cool =
Evening Heat =
Cool =
Night Heat =
Cool =
NOTE: While programming you must press a button at least every 2 minutes or the thermostat will revert back to the
operational mode. If this happens, simply repeatedly press or press and hold 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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Setting Or Changing
Program Times
Step 1: Press and release the PROGRAM button.
“Mo” or the current day of the week will flash and the
Morning “ “ event symbol will appear on the
display. Press the DECREASE button or INCREASE
button to access the day of the week you wish to
start programming or to change the existing program.
Step 2: Press and release the PROGRAM button.
The hours and “AM” or “PM” will flash. Press the
DECREASE button or INCREASE button to
set the start time hours for the Morning “ “
event for Monday (or any other day as set in step 1).
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Step 3: Press and release the PROGRAM button.
The minutes will flash on the display. Press the
DECREASE button or INCREASE button to
set the select time minutes for the Morning “ “
event (program times are set in ten-minute increments).
Step 4: Press and release the program button. The Day
“ ” event symbol, flashing hours, and “AM” or “PM”
will appear on the display. Repeat steps 2 and 3 for the
Day “ ”, Evening “ ”, and Night “ ”.
Step 5: Press and release the PROGRAM button. The word “Copy” and the day just programmed will
appear on the display. If your schedule is the same for consecutive days, press the DECREASE
button or INCREASE button to add days to the display. This prevents from having to program the
same times over and over again or continue on to step 6 to program the next day.
Step 6: Press and release the PROGRAM button to continue to the next day to be programmed.
Repeat steps 2-5 for each day.
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