Aprilaire 8539 Thermostat User Manual
Contents
1. SIUS FAHRENHEIT Simultaneously press VW and A to switch between Celsius and Fahrenheit temperature display NOTES This page intentionally left blank Model 8539 111 172B 97185 USER CONTROLS Cont d FAN The fan will come on automatically when the system is operating but there is no indication of this on the display To select continuous fan operation press the FAN button and the display will show This is recommended for electronic air cleaners or con tinuous ventilation requirements NOTE For fan coil applications in which the O and B output terminals control valve position DO NOT use continuous fan REMOTE SENSOR OPTION RS1 RS2 RS V The thermostat is designed to accept the electronic remote sensor which will allow you to locate your thermostat in an area away from view Indoor and outdoor sensors are available separately ELECTRONIC PROGRAMMABLE THERMOSTAT TWO YEAR LIMITED WARRANTY Your Research Products Corporation Aprilaire Thermostat unit is expressly warranted for two 2 years from the date of installation to be free from defects Research Products Corporation s exclusive obligation under this war ranty shall be to supply without charge a replacement for any thermo stat which is found to be defective within a two 2 year period and which is returned no later than thirty 30 days after said two 2 year period by you to either your original supplier or to Research Products Corporation Madison2. Wisconsin 53701 together with the model num ber manufacturing code number and installation date of the thermostat THIS WARRANTY SHALL NOT OBLIGATE RESEARCH PRODUCTS CORPO RATION FOR ANY LABOR COSTS AND SHALL NOT APPLY TO DEFECTS IN WORKMANSHIP OR MATERIALS FURNISHED BY YOUR INSTALLER AS CON TRASTED TO DEFECTS IN THE THERMOSTAT ITSELF IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTIC ULAR PURPOSE SHALL BE LIMITED IN DURATION TO THE AFORESAID TWO 2 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 UNIT INSTALLED BY A QUALIFIED HEATING 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 dam ages so the 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 This equipment if installed in strict accordance with the manufacturers instructions complies with the limits for a Class B compu
3. imum ON 2 Keypad locked 3 Fan on with plenum switch 1 4 minute minimum ON 2 Keypad unlocked 3 Fan immediate with call for heat NOTE The BLACK rectangle denotes factory setting OUTPUT TERMINAL FUNCTIONS WLI Energizes on a call for first stage heat Nlinuwinii Energizes on a call for first stage cool Grioisisrys Energizes with a call for heating or cooling or selected by the FAN button Rocriwiami Independent switching voltage 24V 24 VAC 24 V C 24 VAC common o Energizes the reversing valve continuously in cooling mode gt Energizes the reversing valve continuously in heating and off modes RS2 For outdoor temperature sensor RS1 and or indoor remote sensor options Refer to the instructions included with the sensors ep RESEARCH PRODUCTS corporation P O BOX 1467 MADISON WI 53701 1467 CALL 608 257 8801 FAX 608 257 4357 Products For Better Indoor Air Quality
4. ing the setpoint is as simple as push ing a button In addition you may choose to display the temperature in F or C The thermostat also allows you to select continuous fan operation useful when using an air cleaner or have the fan come on with the equipment POWER FAILURES Your thermostat employs the latest developments in solid state electronic technology One of the unique features of your thermostat is that no battery is required to maintain your selected set points in the event of a power loss as the memory is unaffected by power failures of any duration When power is restored the thermostat will continue operating as if the power had never been off TEMPERATURE ACCURACY Full temperature accuracy will be realized only after the thermostat has been installed and powered for at least one hour The model 8539 is a single setpoint heat cool ther mostat It features a narrow fixed deadband between intemal heat and cool setpoints USER CONTROLS COOLER To lower the temperature in the zone press and hold the V button until the desired temperature is dis played then release WARMER To raise the temperature in the zone press and hold the A button until the desired temperature is dis played then release The number that is displayed when the button is released is the new setpoint or control temperature for the zone The display will return to the normal room temperature display after a few seconds CEL
5. refully dress the wires so that any excess is pushed back into the wall cavity or junction box Ensure that the wires are flush to the plastic subbase The access hole should be sealed or stuffed to prevent drafts from affecting the thermostat 1 i T igi gt 8539 wi Y1 G R 24V Note 2 24V c M o i B O 7 Before the thermostat is reinstalled on the subbase install the optional indoor remote sensor model 8002 if used Refer to the installation instructions supplied with the model 8002 REPLACING THE THERMOSTAT ON THE SUBBASE 1 Position the thermostat on the hinged tabs located at the top of the subbase 2 Gently swing the thermostat down and press on the bottom center edge until it snaps in place Note 1 If jumper is removed a dedicated transformer is required at the R terminal to power the loads Note 2 This thermostat may be used with 24 Volt DC The negative side of the DC supply must be wired to the 24V c terminal Note 1 Line Transformer Voltage SLIDE SWITCH SETTINGS Thermostat Body Rear View DIP Switch in the ON position DIP Switch in the OFF position 1 2 minute min
6. rilaire 8539 Single Setpoint Heating amp Cooling Auto Changeover with Reversing Valve OPERATING INSTRUCTIONS azZT TTl SEE REVERSE FOR INSTALLATION INSTRUCTIONS USER CONTROLS Cont d HEAT amp COOL INDICATION ON DISPLAY When the equipment is off both flame and snowflake are on steadily When the thermostat is calling for heat the flame flickers and the snowflake goes off When cooling the snowflake flickers and the flame goes off LIMITED OVERRIDE When the keyboard is locked DIP switch 2 ON the user may override the temperature setpoint for 1 hour by pressing either the V or A button The range of temperature override is 6 F or 43 C from the programmed daytime setpoint Your new digital thermostat has been designed to provide accurate control and display of room temper ature In addition it also will display all relevant infor mation pertaining to your system The clearly marked buttons and informative display make it extremely easy to understand and simple to use Please take a few moments to read the brief instruc tions and familiarize yourself with the various func tions in order to obtain maximum benefit from this truly unique electronic control GENERAL INFORMATION The thermostat normally displays room temperature mode of operation and whether cooling or heating is currently on The two buttons on the front of the unit allow complete control of the equipment Raising or lower
7. ting device pur suant to Subpart J of Part 15 of FCC rules INSTALLATION INSTRUCTIONS LOCATION To ensure proper operation the thermostat should be mounted on an inside wall in a frequently occupied area of the building In addition its position must be at least 18 46cm from any outside wall and approx imately 5 1 5m above the floor in a location with freely circulating air of an average temperature BE SURE TO AVOID THE FOLLOWING LOCATIONS behind doors or in comers where freely circulating air is unavailable where direct sunlight or radiant heat from appli ances might affect control operation onan outside wall adjacent to or in line with conditioned air dis charge grilles stairwells or outside doors where its operation may be affected by steam or water pipes or warm air stacks in an adjacent parti tion space or by an unheated uncooled area behind the thermostat where its operation will be affected by the supply air of an adjacent unit near sources of electrical interference such as arc ing relay contacts SPECIFICATIONS Rated Voltage 20 30 VAC 24 nominal Rated A C 0 05 Amps to 0 75 Amps continuous Current per output with surges to 3 Amps Max Rated D C 0 Amps to 0 75 Amps continuous Current per output with surges to 3 Amps Max Control Heating 38 to 88 F in 1 Steps Range 5 to 30 C in 1 Steps Cooling 60 to 108 F in 1 Steps 16 to 40 C in 1 Steps Thermostat Meas
8. urement 28 to 124 F or 0 to 48 C Range O D T Displayed Range 50 to 124 F or 48 to 48 C Control 5 C at 20 C Accuracy 1 F at 68 F Minimum between heating and Deadband cooling 2 F or 1 C NOTE This thermostat contains electronic circuitry replacing the conventional mechanical anticipator Ww THERMOSTAT INSTALLATION Insert a flat blade screwdriver or coin 1 8 into the slot located in the bottom center of the thermostat case and twist 1 4 tum When you feel or hear a click grasp the case from the bottom two comers and sep arate from the subbase as shown in the diagram at the right Some models require more force than oth ers when separating due to the number of terminals on the subbase Swing the thermostat out from the bottom Lift the thermostat up and off the subbase Place the rectangular opening in the subbase over the equipment control wires protruding from the wall and using the subbase as a template mark the location of the two mounting holes exact vertical mounting is necessary only for appearance Use the supplied anchors and screws for mounting on drywall or plaster drill two 3 16 5mm diameter holes at the marked locations use a hammer to tap the nylon anchors in flush to the wall surface and fas ten subbase using the supplied screws Do not over tighten Connect the wires from your system to the thermostat terminals as shown in the wiring diagrams Ca
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