Aprilaire 8870 Thermostat User Manual
Contents
1. FA TI Derby P THE weinen FIGURE 8 Cont TEMPERATUAE SET LIP SUBMENU LiF el ALL DH m rame M H augu BATES aes im SCROLL UP ani eo sro mag Dar 707 Feen het Decora 0 2 ETER abusi ire BALANCE PONTE SET UP BLIB MEHLI DARAY BET LIP 15 16 DIAGRAM 1 SINGLE STAGE FURNACE AND AC ONE STAGE FURNACE REMOTE SENSOR S 15 5 COOL TERMINALS gt d O COMMUNICATION ONE STAGE AIR CONDITIONER entrara IM PORTANT The B terminal is for reversing valve heat NOTE HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation If the automation system is to be installed after the DO NOT connect the HVAC installation leave the R and C terminals connected B terminal to to ensure the HVAC system operates If the automation common side of system is installed before the HVAC wiring then DO NOT transformer connect HVAC wires to R and C 24V FIELD WIRING FACTORY WIRING DS OPTIONAL 24V FIELD WIRING SEE NOTE DIAGRAM 2 TWO STAGE FURNACE AND TWO STAGE AC TWO STAGE FURNACE 120 E wej TWO ST2. NOTES 25 rilaire THE BEST IN INDOOR AIR COMFORT The Aprilaire Indoor Air Comfort System is an integrated group of air quality enhancement products designed to work with heating and cooling systems to make homes more comfortable For the best in indoor air quality install Aprilaire brand products to solve your customers Indoor Air Comfort needs Aprilaire Aprilaire Aprilaire Automatic Humidifiers High Efficiency Air Cleaners Energy Recovery Ventilators The world s first computer equipped Delivers the cleanest Your best value for a constant completely automatic humidifiers healthiest air ever available from controlled supply of fresh air with a whole house air cleaner energy recovery Aprilaire Aprilaire Zone Control Systems Electronic Thermostats The most reliable way to Ultra thin easy to use digital achieve temperature control in programmable and communicating controls every area of your home featuring pinpoint accuracy RESEARCH PRODUCTS corporation BOX 1467 MADISON WI 53701 1467 B2202660 REV 011 01
3. HEAT appears on display Repeat step 7 to verify Emergency Heat operation 12 10 OPTIONAL HVAC SET UP FEATURES There are a number of HVAC features that can be configured for the particular application These include temperature control options display options and high low balance points heat pumps only A TEM PERATURE CONTROL OPTIONS 1 OFFSET allows the user to offset the displayed room temperature 3 F from true temperature This thermostat is calibrated to be within 1 F of true temperature 1ST STAGE DIFFERENTIAL determines the level of control and consequently the cycle rate Adjustable between 0 5 F and 2 0 F this is the value above below the set point that the temperature must rise fall to start the cooling heating It is also the value below above the set point that the temperature must fall rise for the cooling heating to stop For example if the temperature setting was 70 F and the Ist stage differential was Set at 0 5 F in the heat mode the heat would come on at 69 5 F and stay until the temperature was 70 5 F A small differential will result in a tighter control but more heating cooling cycles 2ND STAGE DIFFERENTIAL again adjustable between 0 5 F and 2 0 F this also determines the level of control by determining when to use the 2nd stage of heating or cooling It can also be used to keep 2nd stage cooling from coming on too soon when Ist stage is acting to control temperature
4. Two Stage Heat amp Two Stage Cool 3 18 Boiler with AC Two Transformers 4 19 Single Stage Heat Pump 5 20 Two Stage Heat Pump 6 21 First Stage Radiant Floor Heat Second Stage Furnace One Stage of Cooling 7 22 FIGURE 5 COMMUNICATION TERMINAL DEFINITIONS refer lo Aprila HVAC Aulormalion Eyaberm install aras for communication wiring deines Bam RECEIVE raference automation shami ANA TRANSAT altars ya REF GAOUND REFERENCE A THERMOSTAT WOLTAGE hol THERMOSTAT VOLTAGE cammon SENSOR TERMINAL DEFIMNITIGNS refer lo sensor lierature for wiring datas ASARSE SENSOR COMMUNICATION hall duplex RSR THERMOSTAT VOLTAGE hati RSC THERMOSTAT VOLTAGE EQUIPMENT TERMINAL DEFINITICHIE AH SWITCHED VOLTAGE HEAT SWITCHED VOLTAGE COOL Ev COOL REVERSINS VALVE COOL nergized in COOL made BV HEAT VALVE HEAT Energies eller indes G DEH si STAGE COOLING pump OR ial ETAGE COMPRESSOR hal pume OR DEAD FICA TOO with humidkby control siri 2nd STAGE COOLING rerheal pure OF and STAGE COMPRESSOR Peal pump HUMAN 151 STAGE HEAT ran heal pump OA Jad STAGE HEAT AMD 1 STAGE EMERG HEAT heal pomp ORI Pra IF ICCATIDH humidity control sensor Wa 2nd ETAGE HEAT jnceehaat pump OR Jad ETAGE EMERGENCY HEAT heal pume 7 WIRING THE THERM OSTAT Cont Check each wire to ensure it is securely fastened not broken and exposed wires a
5. levels or to keep costly auxiliary heat from coming on too soon when the heat pump is sufficient B BALANCE POINTS These values are adjustable but are only used by the thermostat when it has been configured to operate as a heat pump and when a remote outdoor temperature sensor with address 1 is wired to the thermostat BALANCE POINTS Cont 1 LOW BALANCE POINT the outdoor temperature below which compressor terminals will not be energized HIGH BALANCE POINT the outdoor temperature above which the auxiliary heat terminal will not be energized in the HEAT mode does not effect Emergency Heat operation C DISPLAY OPTIONS 1 TEMPERATURE SCALE all temperatures displayed including room temperatures set points can be F or C SHOW TEMPERATURE SET POINTS ALWAYS keeps the temperature settings visible on the display at all times SHOW TEMPERATURE SET POINTS ONLY IF CHANGED displays the temperature settings heat and or cool only when the user changes them The first press of either the up or down adjust buttons will display the settings SHOW DATE AND TIME the message display will by default scroll three messages showing the status of the mode fan and equipment outputs A fourth date and time can be added to this list However the automation system must transmit the time and date to the thermostat at least once a day If the automation system is not capable of doing this the date and t
6. AGE AIR CONDITIONER r T 1 APRILAIRE MODEL T 8870 THERMOSTAT REMOTE SENSOR S COMMUNICATION TERMINALS Cor SEE NOTE IMPORTANT The B terminal is for reversing valve heat DO NOT connect the B terminal to common side of transformer OPTIONAL 24V FIELD WIRING SEE NOTE 24V FIELD WIRING FACTORY WIRING NOTE HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation If the automation system is to be installed after the HVAC installation leave the R and C terminals connected to ensure the HVAC system operates If the automation system is installed before the HVAC wiring then DO NOT connect HVAC wires to R and C 17 DIAGRAM 3 ROOF TOP UNIT TWO STAGE HEAT AND TWO STAGE COOL 18 ROOF TOP UNIT m 8870 THERMOSTAT COOL APRILAIRE MODEL 24V FIELD WIRING FACTORY WIRING C OPTIONAL 24V FIELD WIRING SEE NOTE REMOTE SENSOR S IMPORTANT The B terminal is for reversing valve heat DO NOT connect the B terminal to common side of transformer COMMUNICATION TERMINALS NOTE HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation If the automation system is to be installed after the HVAC installation leave the R and C terminals connected to ensure the HVAC system operates If the automati
7. COMMUNICATING THERMOSTATS Installation Instructions MODEL 8870 These instructions are for connecting the Thermostat to the HVAC equipment To connect communication features please reference the Communicating Thermostat System Installation M anual INSTALLATION INSTRUCTIONS MANUAL TABLE OF CONTENTS Model 8870 Thermostat Specifications 1 HVAC System Pre Installation Check List 2 What s The BOX c ed 3 Select The Thermostat 4 Disassembly canon op a it 5 Mount Base 6 Setting The Dip Switches 7 Wiring The Thermostat 8 Reassemble The 5 9 HVAC System 0 2 10 Optional HVAC Set Up Features 11 To Access The HVAC Set Up Features Wiring Didgrams rat ee nee a ner Research Products Corporation 2001 READ COMPLETE SAFETY amp INSTALLATION INSTRUCTIONS BEFORE STARTING WARNING 120 volts may cause serious injury from electrical shock Disconnect electrical power to the furnace and air conditioner before starting i
8. IC rossi c ci SINGL 6 SETTING THE DIP SWITCHES Set the dip switches located on the thermostat circuit board Figure 4 according to the application needs Table 2 Figure 4 shows what each switch corresponds to depending on posi tion Switch one should be set in the OFF Servant position unless you plan to broadcast readings from remote temperature sensors to other thermostats in the system when there is no communication system in place TABLE 2 APPLICATION SWITCH 1 SWITCH 2 SWITCH 3 SWITCH 4 Single Stage Furnace amp AC Servant Fossil Single H C Two Stage Furnace amp Two Stage AC Servant Fossil Multi Roof Top Unit Two Stage Heat Two Stage Cool Servant Fossil Multi H C Boiler with AC Two Transformers Servant Fossil Single H C Single Stage Heat Pump Servant Electric Single HT Pump Two Multi stage Heat Pump Servant Electric Multi HT Pump First Stage Radiant Floor Heat Second Stage Furnace One Stage of Cooling Servant Fossil Multi H C 7 WIRING THE THERM OSTAT a Strip 1 4 of insulation from each wire to be used Figure 5 shows all wiring terminal definitions b Secure wires into the terminals on the base according to the appropriate wiring diagram Table 3 Use color coding practices i e white wire to W terminal whenever possible TABLE 3 APPLICATION DIAGRAM PAGE Single Stage Furnace amp AC 1 16 Two Stage Furnace amp Two Stage AC 2 1 Roof Top Unit
9. ature for additional details 4 DISASSEMBLY No tools required use hands to pull the front panel off of the base Figure 2 While holding the base of the thermostat apply pressure to the base of the latch with your thumb Figure 3 Both sides have a latch but itis easiest to unlatch one side at a time FIGURE 2 CAUTION Loss of internal programs may result from static discharge to thermostat circuit board Installer must touch a grounded metal object before handling the circuit board FIGURE 3 Press base here 5 MOUNT BASE TO WALL There are four screw holes located on the base of the thermostat two are for a junction box mounting along with two for alternate mounting spacing Use one of the holes on the top and one on the bottom a Place the base over the wire hole opening in the wall level the base and mark the screw hole mounting locations leveling required for appearance only b If using supplied wall anchors drill 3 16 hole in the center of the marked locations and tap in the wall anchors If using the supplied screws only drill a 3 32 hole in the center of the marked locations c Fasten the base to the wall with the supplied screws d Seal wire entry using caulk drywall putty or insulation CAUTION M inimize wire entry hole size and seal drafts from inside the wall could affect temperature readings MULTI H FIGURE 4 OF SERVANT MASTER 8 e sene L BW P ELECTR
10. es If the automation system is installed before the HVAC wiring then DO NOT connect HVAC wires to R and C OUTDOOR HEAT PUMP UNIT pc uc HE 7 APRILAIRE MODEL 8870 THERMOSTAT J SEE NOTE REMOTE SENSOR S 20 Uu TERMINALS COMMUNICATION IMPORTANT The thermostat B terminal is for reversing valve heat DO NOT connect the B terminal to common side of transformer 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING SEE NOTE DIAGRAM 6 TWO STAGE HEAT PUMP INDOOR HEAT PUMP UNIT 120 1ST STAGE COMPRESSOR 2ND 2ND STAGE COMPRESSOR NOTE HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation If the automation system is to be installed after the HVAC installation leave the R and C terminals connected to ensure the HVAC system operates If the automation system is installed before the HVAC wiring then DO NOT connect HVAC wires to R and C APRILAIRE MODEL TN BSJOTHERMOSTAT _ SEE RSCO NOTE 2 RSBO RSAO COMMUNICATION TERMINALS gt DEFROST OUTDOOR HEAT PUMP UNIT IMPORTANT The thermostat B terminal is for reversing valve heat DO NOT connect the B terminal to commo
11. ime can be configured not to show 11 TO ACCESS THESE HVAC SET UP FEATURES When first powered up the message display will scroll through the current mode status fan status and heating cooling output status This is referred to as Passive Display because you do not interact with it To get into the Set Up Menu press the Enter button and M ode button at the same time This is referred to as User Interactive Display as the user navigates through various menu and sub menu selections to change variables 13 11 TO ACCESS THESE HVAC SET UP FEATURES Cont Set Up is menu driven but only one menu item is visible at a time Figure 8 shows the entire Main Menu Selecting any one of the Main Menu items by pressing the Enter button will enter a corresponding Sub M enu Figure 8 also shows the Temperature Set Up Balance Points Set Up and Display Set Up sub menus expanded The Scroll Up and Scroll Down qw buttons are used to move between menu items or change values The Enter 4 button is used to select a menu item or enter a value When in Thermostat Set Up if none of the three navigation buttons are pressed in 5 min utes the display will return to Passive Display Again you will only see one menu item at a time 14 uz ere CE c e ETAC ER HIER AnD CHAHSE ALLES USE THE ENTER BUT TOR TO SELECT FIGURE 8 SELECT ExIT PENES Ti 1 TIE
12. manufacturer specifications for safe operating temperatures STEP PRESS LOOK FOR NOTES AND REACTION 1 Press the Mode button repeatedly untill OFF appears on the display FAN ON Press the Fan button System blower should start and FAN ON appears on display Press again to stop r1 HU Press the Mode button until COOL appears along with the current cool setting 2 3 4 ap 11 COOL Use the down arrow to lower the set point 3 F below room temp In 5 10 seconds the first stage of cooling begins and the COOL icon begins to flash If there is a second stage it will begin in 4 minutes OFF Press the Mode button until OFF appears on the display You must change the mode to override the Minimum On time delays qo BB Press the Mode button until HEAT appears along with the current heat setting HEAT A Use the up arrow to raise the set point 3 F above room temp In 5 10 7 CA seconds the first stage of heating begins and the HEAT begins to flash HEAT If there is a second stage it will begin in 4 minutes 7A HEAT AUX AUX comes on when the auxiliary heat terminal W1 is energized HEAT PUMP ONLY The LED on top of thermostat will illuminate 8 Press the Mode button until OFF appears the display During Check out change the mode to override the Minimum On time delays 9 EM HEAT HEAT PUMP ONLY Press Mode button until EM
13. n side of transformer 24V FIELD WIRING FACTORY WIRING OPTIONAL 24V FIELD WIRING SEE NOTE 21 DIAGRAM 7 FIRST STAGE RADIANT FLOOR HEAT SECOND STAGE FURNACE ONE STAGE OF COOLING 22 ONE STAGE FURNACE 120 VAC 15 STAGE HEAT 1ST STAGE COOL COOLING EQUIPMENT 1sT Aprilaire Model 8024 24 volt Relay Pack 1 777 0 APRILAIRE MODEL 3 8870 THERMOSTAT 1 oH ROL RSRO SEE Eg Rsco NOTE 22 RSBO 8 RSAO REFO O0 55 B O OW 22 OY 35 8 not supplied STG COOL 2 IMPORTANT RADIANT FLOOR 3 R The thermostat B 9 terminal is for reversing He valve heat DO NOT HEAT Ls connect the B terminal to common side of transformer 24V FIELD WIRING UH FACTORY WIRING dee OPTIONAL 24V FIELD WIRING SEE NOTE NOTE HVAC installer may need to connect 24V AC to the R C terminals to check the HVAC operation If the Automation system is to be installed after the HVAC installation leave the R and C terminals connected to ensure the HVAC system operates If the automation system is installed before the HVAC wiring then DO NOT connect HVAC wires to R and C NOTES 23 24 NOTES
14. nace One Stage of Cooling 6 1 2 2 WHAT S IN THE BOX Thermostat Figure 1 front panel cover and base Installation M anual Owners Manual Cover Hardware bag screws and wall anchors 3 SELECT THE THERM OSTAT LOCATION Determine if the thermostat will be operating alone or with remote temperature sensors If the unit is stand alone there are certain measures that must be taken to ensure accurate temperature control STAND ALONE THERM OSTAT M OUNTING CRITERIA Mounton an interior wall In aroom frequently occupied Atleast 18 inches from any outside wall Approximately 5 feet above the floor Check with local building codes for height requirements in commercial requirements DO NOT locate the thermostat Behind doors in corners or other dead air spaces In direct sunlight or near lamps appliances or other sources of radiant heat an outside wall or wall exposed to an unconditioned space i e garage etc Inthe flow path of a supply register in stairways or near outside doors e Ona wall where concealed pipes and or ductwork will affect the thermostat Near sources of electrical interference such as arcing relay contacts WITH REMOTE TEM PERATURE SENSORS Follow the guidelines for placement of the sensors and locate the thermostat indoors where operating range see specs will not be violated i e do not install in a cold garage or hot equipment room See the sensor installation liter
15. nstallation This thermostat is not a 120 volt line voltage device Improper installation may cause serious injury from electrical shock This product must be installed by a qualified heating and air conditioning contractor inaccordance with NEC Standards and applicable local and state codes Mercury is toxic and may be hazardous to health Any replaced thermostats containing mercury must be disposed of properly Contact local authorities for disposal information MODEL 8870 THERMOSTAT SPECIFICATIONS Control Voltage 24V AC 320 Switched Voltage 18 30V Maximum Operating Current 2 0 total at rated voltage through all outputs 1 0A through any one output Maximum Surge Current 2 0 Control Accuracy 5 09 Control Range 40 90 F Operating Range 32 99 F 1 HVAC SYSTEM PRE INSTALLATION CHECK LIST Before getting started determine what type of heating system is will be installed in the house Then use Table 1 to determine if the proper numbers of wires are available depending on the HVAC System Additional wires will be required for communication system TABLE 1 APPLICATION HVAC WIRES DIAGRAM PAGE Single Stage Furnace amp AC 5 1 16 Two Stage Furnace amp Two Stage AC 7 2 17 Roof Top Unit Two Stage Heat amp Two Stage Cool 7 3 18 Boiler with AC Two Transformers 5 4 19 Single Stage Heat Pump 7 5 20 Two Stage Heat Pump 9 6 21 First Stage Radiant Floor Heat Second Stage Fur
16. on system is installed before the HVAC wiring then DO NOT connect HVAC wires to R and C DIAGRAM 4 BOILER WITH TWO TRANSFORMERS orum ng APRILAIRE MODEL AIR HANDLER 8870 THERMOSTAT 120 E jj m Lu 4 Toma RSRO SEE Der wa Rsco NOTE ban 28 RSBO zo RSAO FAN REFO RELAY 1ST STAGE 5 B COOL 52 Bro 5 AIR CONDITIONER 25 8 1ST SIG fae COOL IMPORTANT The thermostat B terminal is for reversing valve heat DO NOT connect the B terminal to common side of transformer NOTE HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation If the Automation system is to be installed after the HVAC installation leave the R and C terminals connected to 24V FIELD WIRING Hit ine utr FACTORY WIRING ensure the HVAC system operates If the CES OPTIONAL 24V automation system is installed before the FIELD WIRING SEE NOTE HVAC wiring then DO NOT connect HVAC 19 wires to R and C 20 DIAGRAM 5 SINGLE STAGE HEAT PUMP INDOOR HEAT PUMP UNIT NOTE HVAC installer may need to connect 24V AC to the R and C terminals to check the HVAC operation If the automation system is to be installed after the HVAC installation leave the R and C terminals connected to ensure the HVAC system operat
17. re not touching 8 REASSEMBLE THE THERMOSTAT No tools required line up pins on circuit board with the corresponding terminal blocks Use your hands to push the front panel securely to the mounted base CAUTION Loss of internal programs may result from static discharge to thermostat circuit board Installer must touch a grounded metal object before handling the circuit board 9 HVAC SYSTEM CHECK OUT HVAC installer may need to connect 24V AC to the R and C terminals to check HVAC operation If the automation system is to be installed after the HVAC installation leave the R and C terminals connected to ensure the HVAC system operates If the automation system is installed before the HVAC wiring then do not connect HVAC wires to R and C When the thermostat is first turned on all of the graphics of the main LCD are momentarily displayed this will look like Figure 6 FIGURE 6 MESSAGE DISPLAY SCROLL SET UP BUTTONS DIFI ROON 682 DIF2 KD or NETW n ILI M HM 58 n or EM HEAT AUX COOL MAIN DISPLAY ADJ UST _ Use the Check Out Procedure Figure 7 on the next page to determine ifthe thermostat is controlling the HVAC equipment 10 FIGURE 7 CHECK OUT PROCEDURE CAUTION The following check out procedure will turn the heating and cooling equipment on and off Do not operate cooling at low outdoor temperatures Do not operate heating at high outdoor temperatures Refer to equipment
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