AprilAire 8870 - Manuals

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 stairway...

FIGURE 3 5. MOUNT BASE TO WALL There are four screw holes located on the base of the thermostat; two are for a junction boxmounting, along with two for alternate mounting spacing. Use one of the holes on the topand one on the bottom. a) Place the base over the wire hole opening in the wall; level th...

6 6. SETTING THE DIP SWITCHES Set the dip switches located on the thermostat circuitboard ( 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 tobroa...

TABLE 2 APPLICATION SWITCH #1 SWITCH #2 SWITCH #3 SWITCH #4 Single Stage Furnace & AC Servant Fossil Single H/C Two Stage Furnace & Two Stage AC Servant Fossil Multi H/C Roof Top Unit (Two Stage Heat & Two Stage Cool) Servant Fossil Multi H/C Boiler with AC (Two Transformers) Servant Fos...

9 7. WIRING THE THERMOSTAT (Cont.) c) Check each wire to ensure it is securely fastened, not broken, and exposed wires are 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 secur...

10 Mode Fan Enter SCROLL /SET-UP BUTTONS ADJUST BUTTONS MESSAGE DISPLAY MAIN DISPLAY REMOTE NETWORKOVERRIDE 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 th...

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 t...

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) TEMPERATURE CONTROL OPTIONS 1. OFFSET – allows the user to offset...

14 FIGURE 8 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-Menu. Figure 8 also shows the Te...

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 the R and C terminals to check the HVAC operation. If the automation system is to be installed after the HVAC installation, leave the...

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 2NDSTG 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...

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 2NDSTG COOL G Y1 W1 Y2 W2 RH RC O APRILAIRE MODEL 8870 THERMOSTAT COMMUNICA...

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- ...

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 RS...

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...

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 ...

B2202660 REV. 011/01 P.O. BOX 1467 • MADISON, WI 53701-1467 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 a...