Aprilaire 8551 Thermostat User Manual
Contents
1. Press to sot Day Pross to display Hour and Minas cuidoor temperatura Pross lo change beteean Hh plenos Standard Time and Outdoor Sensor any Daylight Saving Time active event morning toa las day evening righ during cooling call Press do program lemmperatunes are siari mas Press to overde Press lo select program indelinialy Coolio Rasume to rebum bo progam Press for continuous tan Press again to Time amd day ol the resuma do anto dan week Time does not display during Hold r Prasa bo raturn to Of Mode program trom Presa to krwar and raina tamparary or Fan icon displays during ae poinL Press both al permanant hold orto continuous tan only 10 e same time to swilch Bri programming beteeen F and C sequence a 110 904 7 11 01 4 29 PM Page 13 F Tenporarily Ovenide the Set Temperature Press and hold the DECREASE g button or increase GY button to change the roomset point temperature in 1 degree increments The new set point temperature will be held for 3 hours then the thenmostat will automatically retum to the program Holda New Temperature Set Point Press and hold the Decrease button or increase 4 button to change the roomset point temperature in 1 degree increments The new set point temperature can be maintained indefinitely by pressing and releasing the HOLD button The word HOLD will be displayed The thenmostat will maintain this new set point temperature until the RESUME button2. PROGRAM button the Night C event symbol will appear You are now setting the time and cooling temperature you want at night Step 12 Repeat steps 2 6to complete progranming for the noe event Setting Or Changing The Weekend Program Step 1 A E event Weekday program press and release the PROGRAM button Sa Su the Moming Wa jz event symbol flashing IZ or sorre other hour and flashing AM or PIM will appear on the display You are now programming the time and temperatures for the weekend Step2 Repeat steps 2 Once to Weekday ey programing for Moming 1 Ya ae Dey AA g Bening andani gt events for RESUME cooling mode as applicable 110 904 7 11 01 4 29 PM Page 10 gt Reviewing Programmed Time Schedules And Tenperature 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 prograntred press and release the RESUME button to start running programs If no button is pressed the thenvostat will resume automatically in approximately 15 seconds For Best Perfomance The Aprilaire Model 8551 thenmostat is designed for accurate tenperature control and easy operation The following guidelines sh
3. are now setting the time you want your cooling equipment to corre on in the moming Steps Press the Decrease O button or increase GS button to set the desired hour for the Moringa y N event Step 4 Press and release the PROGRAM button 100 or sorre other minutes will flash 110 904 7 11 01 4 29 PM Page 8 F Step A Press the pecrease J button or increase GY a button to set the desired minutes for the Moming ye event programstarting times are set in ten ninute increments RESUME E Step Gi Press and release the PROGRAM button the current cooling temperature will begin to flash You are now setting the cooling tenperature you desire in the moming Step7 Press the Decrease QJ button or increase QS E ta button to set the desired cooling temperature for the Moming event MM Step amp Press and release the PROGRAM button the Day _ event symbol will appear You are now setting the time and cooling temperature you want throughout the day Step2 Repeat steps 2 6to complete progranming for the Day event Step 10 Press and release the PROGRAM button the Evening 3 eventsyrrbol will appear You are now setting the time and cooling temperature you want during the evening 6 Ea 110 904 7 11 01 4 29 PM Page 9 Step 11 Repeat steps 2 6to complete programming for the Evening as 3 event Step 12 Press and release the
4. tenperature Your Aprilaire Thenmostat allows 1 programfor Monday through Friday and 1 programfor Saturday and Sunday Complete the chart on page 4 with your desired temperatures and time schedules before beginning programming NOTE It will take some time for your cooling systemto reach the desired temperature when retuming froma setback Therefore it is suggested you set your programtime before the actual time you want your horre to reach the desired temperature For example if you get up at 7 00 AM and have a 6 degree setback set your Mioming event at 6 00 AM to be sure the desired temperature is reached by 7 00AM 110 904 7 11 01 4 29 PM Page 6 F NOTE While programming you must press a button at least every 15 seconds or the themostat 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 infonmation you have already entered has been retained NOTE If consecutive events have the sane 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 4 Ea 110 904 7 11 01 4 29 PM Page 7 F Step I Press and release the MODE button until the word COOL and the ae cooling symbol appear on the display PRESS OUTDOOR flashing 12 or some other hour and flashing AIM or PIM will appear on the display You
5. ELECTRONIC THERMOSTAT 110 904 7 11 01 4 29 PM Page 2 F OWNER S MANUAL TABLE OF CONTENTS Setting Or Changing The COCK ooooooocccccc cee ee ee ee ene ee rnnr nnn 1 Setting Or Changing The Weekday Program 2 ccc cece ce cece ce cen eee e eee rnnr nnn 3 ProgramScMneguie seg il tees A Sarees ud Bee dees Ade cd 4 Setting Or Changing The Weekend Program 6 ccc ccc ce cece eee eee eee e eens 7 Reviewing Prograntred Tine Schedules And Temperature SettingS 0 eee eee 8 To Start Running The Program occ 8 For Best Performance esc 05 a ei a i A Diab iam Fades ot ae eh 8 Thermostat OSONA aa 9 e Ternperature CONO vice dele ia hd a dade laa caca pac 9 TIS CONO is AE a ieee eae 12 s Equipment Control iat wai eden a a dE 13 Optional Settings For Additional Thenmostat Features o oooococccooco eee eee 14 Ir Gase OF Power EQU ui eee isa 20 Gleanings iea a Se iad ea Rie ee as ENS Se A tage 20 Lit Warranty o 2605 nbd a had a eRe Ot aN de 21 Research Products Corporation 2000 110 904 7 11 01 4 29 PM Page 3 F IMPORTANT READ ALL INSTRUCTIONS THOROUGHLY Programing your Aprilaire Themostat is done in three easy steps setting the clock setting the event times and setting your desired temperatures Setting Or Changing The dock 0 Step I If you are currently in Daylight Saving Time first Sunday in April thru fourth Sunday in October press the DST button and ee 1H will appear in the lo
6. Ea
7. atch tab you should feel or hear a click see Figure 2 e After the latch releases grip the thenvostat panel at the bottomcomers and swing it up and away from the base to completely separate See Figure 3 17 110 904 7 11 01 4 29 PM Page 20 F Once the thenmostat panel has been opened and removed fromthe base tum the thenrostat 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 reasserrble the thenrostat a Place the cover on the base by lining up the 2 round pegs on the bottomof the cover with the half circle cutouts on weed the top of the base a Note that the LB 2 txtomorthe re mW cover when fully open slides in behind the top Corro of the base Swing j the cover fully open The cover will stay in place 110 904 7 11 01 4 29 PM Page 21 F ALIGN HINGE TABS DS b Align the hinge tabs on the base and thenmostat panel Swing the panel to the base and snap in place at bottomof thenmostat panel see Figure 4 Figure 4 c Tum the thenmostat power back on PRESS IN CENTER OF THERMOSTAT PANEL UNTIL LOCK TAB SNAPS IN PLACE 19 110 904 7 11 01 4 29 PM Page 22 F In Case Of Power Failure The Model 8551 thenmostat does not require a b
8. attery If the power goes out the letters AC appear on the display indicating power is not being supplied to the thenmostat AC will remain on the display for up to approximately 30 minutes after the power goes out During the period that the power is off the cooling systemwill not operate This thenrostat is equipped with a continuous memory feature which does not require a battery The thenmostat will never lose what has been programmed regardless of the length of the power outage If the thermostat has been set to Hold a particular temperature and the power fails the thermostat will resume that temperature when the power is restored After a period of 30 minutes without power the clock will need to be reset The clock will default to 12 00 AM Refer to the Programming Instructions to reset the clock Geaning If the surface of the thenrostat becorres dirty it can be cleaned with plain water or many non abrasive household cleaners such as glass cleaner When using any cleaner be careful not to get any into the interior of the thenmostat Do not spray any cleaner directly onto the thenmostat Spray the cleaner onto a soft cloth and wipe the surface of the thenrostat 20 Es 110 904 7 11 01 4 29 PM Page 23 F Linited 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 Pr
9. e press the FAN button again which will remove the icon fromthe display In the normal operating mode the fan will only run when the air conditioning is operating Gontinuous fan operation is beneficial if your systemis equipped with a high efficiency air cleaner or to circulate air in the home when the air conditioning is not needed Selecting Cooling Mode Press the MODE button until the word GOOL appears on the display In this mode the air conditioning systemwill maintain temperature according to the progranming previously completed unless an override temperature has been entered Note that a Snowflake icon E pal is on the display which flashes when the air conditioning is running Turing the SystemoOfF Press the MODE button until the word ORF appears on the display In this mode the air conditioning systemwill not operate regardless of the temperature The thenmostat can still be prograntred the optional outdoor tenperature sensor will work and the fan will tum on if the FAN button is pressed NOTE After selecting a new mode the thenrostat initiates a delay of up to 4 ninutes to protect the cooling equipment 13 Ea 110 904 7 11 01 4 29 PM Page 16 gt Optional Settings For Additional Thermostat Features The Model 8551 thenmostat is equipped with 2 DIP switches located inside the thenmostat on the printed circuit board These switches are preset by the factory to typical home air conditioning system requirement
10. e above exclusion or limitations may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state 21 Ea 110 904 7 11 01 4 29 PM Page 24 F THE BEST IN INDOOR AIR COMFORT The Aprilaire Total Indoor Air Comfort System is an integrated group of air quality enhancement products designed to work with your heating and cooling system to make your home more comfortable 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 High Efficiency Air Cleaner Fresh Air Exchanger The Best Cure For Dryness Nobody Makes Clean Air Easier Only The Freshest Homes Have April Air The world s first computer equipped The economical trouble free high Your best value for a constant controlled completely automatic humidifier efficiency air cleaner for your home supply of fresh air with energy recovery Zone Control System Hectronic Thermostat Custom Comfort Throughout Your Home Energy Efficiency Never Looked So Good The most reliable way to achieve temperature Ultra thin easy to use programable or digital control in every area of your horre controls featuring pinpoint accuracy RESEARCH PRODUCTS corporation P O BOX 1467 MADISON WI 53701 1467 Products For Better Indoor Air Quality B2202104 REV 11 99 110 904
11. is pressed retuming the thenmostat to the original program This procedure is typically used during extended vacant periods vacations business trips etc to hold an econonical set point until you retum Retumingto Programnred Operation At any tine press the RESUME button to retum the thenmostat to operate as prograntred 11 110 904 7 11 01 4 29 PM Page 14 F Change Between C and F The thenmostat has the capability of displaying either Celsius or Fahrenheit temperatures If the displayed temperature seems abnormally high or low ie 7OF 21 0 you may need to switch to Cor F by simultaneously pressing the pecrense Q button and the mcrense Gy button Checking the Ouicbor Tenperature If your trenvostat was installed with the optional Aprilaire Outdoor Temperature Sensor simply press the OUTDOOR button and the thenmostat will display the outdoor temperature for 3 seconds before automatically retuming to the actual roomtemperature display TIME CONTROL Change From12 to 24 Hour Clock Press and release the LOCK button then press the MODE button To retum to a standard clock repeat the process 12 110 904 7 11 01 4 29 PM Page 15 F EQUIPMENT CONTROL Turing onthe Fan At any time the systemfan can run continuously by pressing the FAN button The Fanicon RE will appear in the lower part of the display indicating that the fan is operating continuously To retum the fan to the normal operating mod
12. nus 3 degrees for a period of 1 hour before the thenmostat automatically retums to the original program If the thenmostat does not respond when a button is pushed it may be because the keypad has been locked A Lock icon A will appear when pushing any buttons other than the buttons outlined above 15 110 904 7 11 01 4 29 PM Page 18 F To change the DIP switch settings the thenmostat must be removed fromthe base which is attached to the wall The power to the thermostat must be tumed off before disasserrbling or the thermostat can be permanently damaged H you do not know where the switch is that controls the power to your themostat do not attempt tp access the GONER DIP switches The following procedure must be carefully followed a Tum off power to THERMOSTAT PANEL the thermostat b Conpletely open the thenmostat cover The cover will snap into this position BASE rere C Carefully insert a Lf mediun sized TEMPERATURE LATCH ACCESS SLOT flathead screwdriver into the latch access CAUTION TO PREVENT DAMAGE AVOID CONTACT WITH BLUE TEMPERATURE SENSOR ON BOTTOM RIGHT slot see Figure 1 HAND CORNER OF THERMOSTAT CIRCUIT BOARD 110 904 7 11 01 4 29 PM Page 19 F CATCH TAB N Figure 2 Fidure 3 g WAL LB Lock TAB A Sei d Gently push in and pry up on the handle of the screwdriver until the lock tab disengages fromthe c
13. oducts Corporation s exclusive obligation under this warranty shall be to supply without charge a replacement for any thermostat which is found to be defective within a two 2 year period and which is returned together with the date of installation no later than thirty 30 days after said two 2 year period by you to either your original supplier or to Research Products Corporation Madison Wisconsin 53701 THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPORATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CONTRASTED TO DEFECTS IN THE THERMOSTAT ITSELF IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID TWO YEAR PERIOD RESEARCH PRODUCTS CORPORATION S LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES OTHER THAN DAMAGES FOR PERSONAL INJURIES RESULTING FROM ANY BREACH OF THE AFORESAID IMPLIED WARRANTIES OR THE ABOVE LIMITED WARRANTY IS EXPRESSLY EXCLUDED THIS LIMITED WARRANTY IS VOID IF DEFECT S RESULT FROM FAILURE TO HAVE THIS THERMOSTAT INSTALLED BY A QUALIFIED COOLING AND AIR CONDITIONING CONTRACTOR IF THE LIMITED WARRANTY IS VOID DUE TO FAILURE TO USE A QUALIFIED CONTRACTOR ALL DISCLAIMERS OF IMPLIED WARRANTIES SHALL BE EFFECTIVE UPON INSTALLATION Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental or consequential damages so th
14. ould be followed to ensure proper operation of the themostat 1 When the thenrostat is operating close the cover to allow for proper air circulation over the temperature sensor 8 Ea 110 904 7 11 01 4 29 PM Page 11 F 2 Do not place anything which can give off warmor cool air such as candles lamps or portable humidifiers near the thenrostat 3 Although the thenmostat is internally equipped to prevent short cycling of the air conditioner itis possible to inadvertently override this protection Do not start stop and restart the equipment without allowing a minimumof 2 minutes between cooling cycles Thermostat Operation The Model 8551 is a full featured thenmostat which allows for additional control and operations after basic time and temperature programming is completed In addition to the programming buttons used to set up all event times and temperatures additional buttons control the following functions TEMPERATURE CONTROL Reading the Actual RoomTenperature The Model 8551 normally displays the roomtemperature not the set point tenperature Check the SetPoint Temperature Press and release the Decrease J button or mcrease f button The thenrostat will display the prograntred set point temperature and a thenvorreter for 5 seconds before automatically retuming to the actual roomten perature display 9 Ea 110 904 7 11 01 4 29 PM Page 12 F Aprilaire Model 8551 5 2 Day Programmable Thermostat
15. s The installing contractor also reviewed the settings during installation to be sure the thenmostat will operate properly with your air conditioning system The DIP switches can however be changed to customize the thenrostat s operation to your particular needs This should only be done after consulting with your contractor The Model 8551 DIP switches control the following functions No 1 4nin 2nin MinimumeEquipiment On Off Times This switch is factory preset at 2 minutes This switch provides short cycle protection for the air conditioning unit If you feel that the air conditioning systemtums on and off too many times per hour ask your contractor about changing the switch to a 4 minute ninimumon tine Keep in mind however that this may increase the overall temperature variation in the house due to longer run and off times DONOT change the position of this switch without first consulting with your contractor 14 Ea 110 904 7 11 01 4 29 PM Page 17 F No 2 Keypad Lock If tampering with the thenrostat is expected and unwanted the keypad can be locked by moving this switch fromthe factory set OFF position to the ON position This should not be done until all progranming is finalized In the locked position only the following functions Can be done The outdoor temperature button will display the outdoor temperature The Decrease 0 button or increase QS button will ten porarily change the set point a maximumof plus or mi
16. wer right hand comer of the display Step2 Press the CLOCK button and Mio or another day of the week will flash Use the pecrease Y or ncrease Gp button to change the flashing symbol to the current day of week Zi Ea 110 904 7 11 01 4 29 PM Page 4 F Step Press the LOCK button again and I2 hours and AM or PIM will flash Use the pecene or creas GS 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 Chock button and 200 minutes will flash Use the pecrease 0 or crease GS button to change the flashing symbol to the current minute Step A Press the Chock button again The clock is now set and the current tine appears on the display PROGRAM ee HOLD Ss 110 904 7 11 01 4 29 PM Page 5 Setting Or Changing The Weekcdhy Program Programming your Aprilaire Hectronic Thenmostat involves selecting the temperature you want in your horre and selecting the time you want it to be that temperature Your Aprilaire Thenrostat will allow a maximumof 4 time schedules per day Each time schedule is known as an event The Moming event is typically when you wake up and is the first event of the day The Dery event is typically set when you leave for work The Evening event is typically set when you corre horre from work and the Night event is set when you go to bed Each event will have 1 cooling
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