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Aprilaire 8870 manual

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Table of contents for the manual

  • Page 1

    Installation Instructions MODEL 8870 These instructions are for connecting the Thermostat to the HV AC equipment. T o connect communication features, please reference the Communicating Thermostat System Installation Manual.[...]

  • Page 2

    INST ALLA TION INSTRUCTIONS MANUAL T ABLE OF CONTENTS W arning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Model 8870 Thermostat Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1. HV AC System Pre-[...]

  • Page 3

    1 READ COMPLETE SAFETY & INST ALLA TION INSTRUCTIONS BEFORE ST ARTING W ARNING 1. 120-volts may cause serious injury from electrical shock. Disconnect electrical power to the furnace and air conditioner before starting installation. This thermostat is not a 120-volt (line voltage) device. 2. Improper installation may cause serious injury from e[...]

  • Page 4

    MODEL 8870 THERMOST A T SPECIFICA TIONS: Control V oltage 24V AC ± 20% Switched V oltage 18 – 30V AC Maximum Operating Current 2.0A total at rated voltage, through all outputs. 1.0A through any one output. Maximum Surge Current 2.0A Control Accuracy ± 1.0°F Control Range 40° – 90°F Operating Range 32° – 99°F 1. HV AC SYSTEM PRE-INST AL[...]

  • Page 5

    2. WHA T’S IN THE BOX • Thermostat ( Figure 1 ): front panel, cover , and base • Installation Manual • Owners Manual • Hardware bag: screws and wall anchors FIGURE 1 3. SELECT THE THERMOST A T LOCA TION Determine if the thermostat will be operating alone, or with remote temperature sensors. If the unit is stand-alone there are certain mea[...]

  • Page 6

    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. • On an outside wall or wall exposed to an unconditioned space (i.e. garage, etc.). • In the flow path of a supply register , in stairways or near outside doors. • On a wall wh[...]

  • Page 7

    FIGURE 3 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 location[...]

  • Page 8

    6 6. SETTING THE DIP SWITCHES Set the dip switches located on the thermostat circuit board ( Figure 4 ) according to the application needs ( T able 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 sens[...]

  • Page 9

    T ABLE 2 APPLICA TION SWITCH #1 SWITCH # 2 SWITCH # 3 SWITCH # 4 Single Stage Furnace & AC Servant Fossil Single H / C T wo Stage Furnace & T wo Stage AC Servant Fossil Multi H / C Roof T op Unit (T wo Stage Heat & T wo Stage Cool) Servant Fossil Multi H / C Boiler with AC (T wo T ransformers) Servant Fossil Single H / C Single Stage He[...]

  • Page 10

    8 FIGURE 5[...]

  • Page 11

    9 7. WIRING THE THERMOST A T (Cont.) c) Check each wire to ensure it is securely fastened, not broken, and exposed wires are not touching. 8. REASSEMBLE THE THERMOST A T 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 in[...]

  • Page 12

    10 Mode Fan Enter SCROLL / SET-UP BUTTONS ADJUST BUTTONS MESSAGE DISPLAY MAIN DISPLAY REMOTE NETWORK OVERRIDE COOL HEAT EM. -AUX DEHUM HUMIDIFY BIAS DIF1 DIF2 C FAN RH ON ROOM F C F R O FIGURE 6 Use the Check Out Procedure ( Figure 7 , on the next page) to determine if the thermostat is controlling the HV AC equipment.[...]

  • Page 13

    11 CHECK-OUT PROCEDURE CAUTION: The following check-out procedure will turn the heating and cooling equipment on and off. Do not operate in cooling at low outdoor temperatures. Do not operate in heating at high outdoor temperatures. Refer to equipment manufacturer specifications for safe operating temperatures. STEP LOOK FOR... PRESS 2 3 NOTES AND [...]

  • Page 14

    10. OPTIONAL HV AC SET -UP FEA TURES There are a number of HV AC 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) TEMPERA TURE CONTROL OPTIONS 1. OFFSET – allows the user to offset the displayed room temperature ± 3 ° F [...]

  • Page 15

    B) BALANCE POINTS (Cont.) 1. LOW BALANCE POINT – the outdoor temperature below which compressor terminals will not be energized. 2. HIGH BALANCE POINT – the outdoor temperature above which the auxiliary heat terminal will not be energized in the HEA T mode (does not ef fect Emergency Heat operation). C) DISPLA Y OPTIONS 1. TEMPERA TURE SCALE ?[...]

  • Page 16

    14 FIGURE 8 11. TO ACCESS THESE HV AC SET -UP FEA TURES (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-Menu. Figure 8 also shows the T emperature Set-Up, Balance Points Set-Up and Di[...]

  • Page 17

    15 FIGURE 8 (Cont.)[...]

  • Page 18

    IMPORTANT! The 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 th e 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 s[...]

  • Page 19

    FAN RELAY 2ND STAGE HEAT 1ST STAGE HEAT R TWO-STAGE FURNACE C G W1 Y1 W2 Y2 1ST STAGE COOL 2ND STAGE COOL L1 L2 120 VAC 24 VAC 1ST STG COOL 2ND STG COOL TWO-STAGE AIR CONDITIONER Y1 C Y2 IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to common side of transformer. G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THER[...]

  • Page 20

    18 FAN RELAY 2ND STAGE HEAT 1ST STAGE HEAT R ROOF TOP UNIT C G W1 W2 Y2 Y1 L1 L2 120 VAC 24 VAC IMPORTANT! The B terminal is for reversing valve-heat. DO NOT connect the B terminal to common side of transformer. 1ST STG COOL 2ND STG COOL G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THERMOSTAT COMMUNICATION TERMINALS B C RSB RSR RSC R RSA B+ A- A+ B- [...]

  • Page 21

    FAN RELAY R AIR HANDLER C G Y1 1ST STAGE COOL L1 L2 120 VAC 24 VAC IMPORTANT! The thermostat B terminal is for reversing valve-heat. DO NOT connect the B terminal to common side of transformer. G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THERMOSTAT COMMUNICATION TERMINALS B C RSB RSR RSC R RSA B+ A- A+ B- REF REMOTE SENSOR(S) NOTE: HVAC installer ma[...]

  • Page 22

    FAN RELAY AUX HEAT R INDOOR HEAT PUMP UNIT C G W1 Y1 COMPRESSOR L1 L2 120 VAC 24 VAC IMPORTANT! The thermostat B terminal is for reversing valve-heat. DO NOT connect the B terminal to common side of transformer. G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THERMOSTAT COMMUNICATION TERMINALS B C RSB RSR RSC R RSA B+ A- A+ B- REF REMOTE SENSOR(S) NOTE:[...]

  • Page 23

    FAN RELAY 2ND STAGE HEAT 1ST STAGE HEAT R INDOOR HEAT PUMP UNIT C G W1 Y1 W2 Y2 1ST STAGE COMPRESSOR 2ND STAGE COMPRESSOR L1 L2 120 VAC 24 VAC G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THERMOSTAT COMMUNICATION TERMINALS B C RSB RSR RSC R RSA B+ A- A+ B- REF REMOTE SENSOR(S) Y1 O B W1 C 1ST STG COMP. REV VALVE COOL REV VALVE HEAT DEFROST OUTDOOR HE[...]

  • Page 24

    G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THERMOSTAT COMMUNICATION TERMINALS B C RSB RSR RSC R RSA B+ A- A+ B- REF REMOTE SENSOR(S) FAN RELAY 1ST STAGE HEAT R ONE STAGE FURNACE C G W1 Y1 1ST STAGE COOL L1 L2 120 VAC 24 VAC 1ST STG COOL COOLING EQUIPMENT Y1 C Aprilaire Model 8024 24-volt Relay Pack (not supplied) 1 2 3 4 5 6 7 8 9 W R Y 24V COM E/W[...]

  • Page 25

    23 NOTES:[...]

  • Page 26

    24 NOTES:[...]

  • Page 27

    25 NOTES:[...]

  • Page 28

    B2202660 REV . 011/01 P .O . BO X 1467 • MADISON, WI 53701-1467 THE BE ST IN IN DOOR AIR CO M FORT ® The Aprilaire ® Indoor Air Comfort System is an integr ated group of air quality enhancement products designed to work with heating and cooling systems to make homes more comfortable. F or the best in indoor air quality , install Aprilaire brand[...]