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110-904 7/11/01 4:29 PM Page 1
®
ELECTRONIC THERMOSTAT
Owner’s Manual
MODEL 8551
5-2 Day Programmable
Thermostat
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110-904 7/11/01 4:29 PM Page 2 OWNER’S MANUAL – TABLE OF CONTENTS Setting Or Changing The Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Setting Or Changing The Weekday Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Program Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Setting Or Chan
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110-904 7/11/01 4:29 PM Page 3 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 “
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110-904 7/11/01 4:29 PM Page 4 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 a
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110-904 7/11/01 4:29 PM Page 5 Setting Or Changing The Weekday Program 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.
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110-904 7/11/01 4:29 PM Page 6 PROGRAM SCHEDULE TIME SCHEDULE THERMOSTAT DESIRED MONDAY – SATURDAY & EVENT SYMBOL TEMPERATURE FRIDAY SUNDAY SETTING Morning Day Evening Night 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 even
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110-904 7/11/01 4:29 PM Page 7 Step 1: Press and release the MODE button until the word “COOL” and the “ ” cooling symbol appear on the display. Step 2: Press and release the PROGRAM button – “Mo Tu 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 cooling equipment to come on in the morning. Step 3: Press the DECREASE button or INCREASE button to set the desi
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110-904 7/11/01 4:29 PM Page 8 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 cooling temperature will begin to flash. You are now setting the cooling temperature you desire in the morning. Step 7: Press the DECREASE button or INCREASE button to set the desired cooling temperature for the Morning “
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110-904 7/11/01 4:29 PM Page 9 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 cooling temperature you want at night. Step 13: Repeat steps 2-6 to complete programming for the Night “ ” event. Setting Or Changing The Weekend Program Step 1: After setting the Night “ ” event Weekday program, press and release the PROGRAM button. “Sa S
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110-904 7/11/01 4:29 PM Page 10 Reviewing Programmed Time Schedules And Temperature Settings Press and release the PROGRAM button repeatedly to advance to “Mo Tu We Th Fr”, or “Sa Su” and specific event. Continue pressing the PROGRAM button to review the time schedules and temperature settings for each desired event. To Start Running The Program After all temperatures and start times have been programmed, press and release the RESUME button to start running programs. If no button is pressed
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110-904 7/11/01 4:29 PM Page 11 2. Do not place anything which can give off warm or cool air, such as candles, lamps, or portable humidifiers, near the thermostat. 3. Although the thermostat is internally equipped to prevent short cycling of the air conditioner, it is possible to inadvertently override this protection. Do not start, stop, and restart the equipment without allowing a minimum of 2 minutes between cooling cycles. Thermostat Operation The Model 8551 is a full-featured thermosta
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110-904 7/11/01 4:29 PM Page 13 • Temporarily Override the Set Temperature: Press and hold the DECREASE button or INCREASE button to change the room set-point temperature in 1 degree increments. The new set-point temperature will be held for 3 hours, then the thermostat will automatically return to the program. • Hold a New Temperature Set Point: Press and hold the DECREASE button or INCREASE button to change the room set-point temperature in 1 degree increments. The new set-poin
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110-904 7/11/01 4:29 PM Page 14 • Change Between °C and °F : The thermostat has the capability of displaying either Celsius or Fahrenheit temperatures. If the displayed temperature seems abnormally high or low (ie: 70˚F = 21˚C) you may need to switch to ˚C or ˚F by simultaneously pressing the DECREASE button and the INCREASE button. • Checking the Outdoor Temperature: If your thermostat was installed with the optional ® Aprilaire Outdoor Temperature Sensor, simply press the OUTDO
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110-904 7/11/01 4:29 PM Page 15 EQUIPMENT CONTROL • Turning on the Fan: At any time the system fan can run continuously by pressing the FAN button. The Fan icon, “ “, will appear in the lower part of the display indicating that the fan is operating continuously. To return the fan to the normal operating mode, press the FAN button again which will remove the icon from the display. In the normal operating mode the fan will only run when the air conditioning is operating. Cont
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110-904 7/11/01 4:29 PM Page 16 Optional Settings For Additional Thermostat Features The Model 8551 thermostat is equipped with 2 DIP switches located inside the thermostat on the printed circuit board. These switches are preset by the factory to typical home air conditioning system requirements. The installing contractor also reviewed the settings during installation to be sure the thermostat will operate properly with your air conditioning system. The DIP switches can however be changed to
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110-904 7/11/01 4:29 PM Page 17 No. 2 – Keypad Lock. If tampering with the thermostat is expected and unwanted, the keypad can be locked by moving this switch from the factory set OFF position to the ON position. This should not be done until all programming is finalized. In the locked position only the following functions can be done: • The outdoor temperature button will display the outdoor temperature. • The DECREASE button or INCREASE button will temporarily change the set poi
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110-904 7/11/01 4:29 PM Page 18 To change the DIP switch settings, the thermostat must be removed from the base which is attached to the wall. The power to the thermostat must be turned off before disassembling or the thermostat can be permanently damaged. If you do not know where the switch is that controls the power to your thermostat, do not attempt to access the DIP switches. The following procedure must be carefully followed: a) Turn off power to the thermostat. b) Completely open the t
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110-904 7/11/01 4:29 PM Page 19 Figure 3 Figure 2 d) Gently push in and pry up on the handle of the screwdriver until the lock tab disengages from the catch tab (you should feel or hear a click – see Figure 2). e) After the latch releases, grip the thermostat panel at the bottom corners and swing it up and away from the base to completely separate (See Figure 3). – 17 –
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110-904 7/11/01 4:29 PM Page 20 Once the thermostat panel has been opened and removed from the base, turn the thermostat over and locate the DIP switches found on the circuit board according to the following drawing: Be careful to change only the intended DIP switches per the explanation given at the beginning of this section. After the DIP switches have been set to the desired position, carefully reassemble the thermostat. a) Place the cover on the base by lining up the 2 round pegs on t
