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Summary of Contents for Aprilaire 8551
- Page 1 110-904 7/11/01 4:29 PM Page 1 ® ELECTRONIC THERMOSTAT Owner’ s Manual MODEL 8551 5-2 Day Programmable Thermostat...
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Page 2: Table Of Contents
110-904 7/11/01 4:29 PM OWNER’S MANUAL – TABLE OF CONTENTS Setting Or Changing The Clock ............1 Setting Or Changing The Weekday Program . -
Page 3: Setting Or Changing The Clock
110-904 7/11/01 4:29 PM 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 Page 3 Step 1: If you are currently in Daylight Saving Time (first Sunday in April thru fourth Sunday in October), press the DST button and “... - Page 4 110-904 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 INCREASE button to change the flashing symbol to the current hour making sure the hour has the proper AM or PM designation.
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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. ”... -
Page 6: Program Schedule
110-904 7/11/01 4:29 PM THERMOSTAT EVENT SYMBOL Morning 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. - Page 7 110-904 7/11/01 4:29 PM 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 to set the desired hour for the Morning “ event.
- Page 8 110-904 7/11/01 4:29 PM button to set the desired cooling temperature for the Morning “ Step 8: Press and release the PROGRAM button – the Day “ now setting the time and cooling 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 –...
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Page 9: Setting Or Changing The Weekend Program
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 “... -
Page 10: Reviewing Programmed Time Schedules And Temperature Settings
15 seconds. For Best Performance The Aprilaire Model 8551 thermostat is designed for accurate temperature control and easy operation. The following guidelines should be followed to ensure proper operation of the thermostat: 1. When the thermostat is operating, close the cover to allow for proper air circulation over the temperature sensor. -
Page 11: Thermostat Operation
2 minutes between cooling cycles. The Model 8551 is a full-featured thermostat which allows for additional control and operations after basic time and temperature programming is completed. In addition to the programming buttons used... - Page 12 110-904 7/11/01 4:29 PM Page 12 – 10 –...
- Page 13 110-904 7/11/01 4:29 PM • Temporarily Override the Set Temperature: Press and hold the DECREASE 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.
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Page 14: Time Control
DECREASE button and the INCREASE • Checking the Outdoor Temperature: If your thermostat was installed with the optional Aprilaire ® Outdoor Temperature Sensor, simply press the OUTDOOR button and the thermostat will display the outdoor temperature for 3 seconds before automatically returning to the actual room temperature display. -
Page 15: Equipment Control
110-904 7/11/01 4:29 PM 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. -
Page 16: Optional Settings For Additional Thermostat Features
4:29 PM 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. - Page 17 110-904 7/11/01 4:29 PM 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: •...
- Page 18 110-904 7/11/01 4:29 PM 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.
- Page 19 110-904 7/11/01 4:29 PM 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).
- Page 20 110-904 7/11/01 4:29 PM 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: Page 20 Be careful to change only the intended DIP switches per the explanation given at the beginning of this section.
- Page 21 110-904 7/11/01 4:29 PM Figure 4 Page 21 Align the hinge tabs on the base and thermostat panel. Swing the panel to the base and snap in place at bottom of thermostat panel (see Figure 4). Turn the thermostat power back on. CAUTION: DAMAGE, AVOID CONTACT WITH BLUE TEMPERATURE SENSOR ON BOTTOM...
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Page 22: In Case Of Power Failure
In Case Of Power Failure The Model 8551 thermostat does not require a battery. If the power goes out the letters “AC” appear on the display indicating power is not being supplied to the thermostat. “AC” will remain on the display for up to approximately 30 minutes after the power goes out. -
Page 23: Research Products Corporation
7/11/01 4:29 PM Page 23 Limited Warranty Your Research Products Corporation Aprilaire ® Thermostat unit is expressly warranted for two (2) years from date of installation to be free from defects in materials and workmanship. Research Products Corporation’s exclusive obligation under this warranty shall be to supply, without charge, a... - Page 24 For the best in indoor air quality, ask your heating and cooling contractor about these fine Aprilaire products, or visit us at www.aprilaire.com for your Indoor Air Solutions. Automatic Humidifier ®...
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