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Aprilaire 8570 - page 1
Premium Pro grammab le The rmostat Safety & Installation Instructions Model 85 70 READ AND SA VE THESE INSTRUCTIONS ...
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Aprilaire 8570 - page 2
T ABLE OF CONTENTS P AGE SPECIFICA TIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 WIRE REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 2 1. SELECT A MOUNTING LOCA TION . . . . . . . . . . . 3 2. OPEN THE THERMOST A T . . . . . . . . . . . . . . . . . . 4 3. MOUNT THE THERMOST A T BASE TO THE WALL . . . . . . . . . . ...
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Aprilaire 8570 - page 3
- 1 - WARNING 1. 120 V olts may cause serious injury from electrical shock. Disconnect electrical power to the HVAC equipment before starting installation. This thermostat is not a 120-volt (line voltage) device. 2. Improper installation may cause serious injury from electrical shock. This product must be installed by a qualified heating and air co ...
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Aprilaire 8570 - page 4
- 2 - - 3 - Figure 1 and the table show the number of wires that must be available at the thermostat in stand-alone thermostat systems (i.e. not as part of an Aprilaire ® Model 6504 Intelligent Zoned Comfort System). Figure 1 shows optional connections to both an outdoor temperature sensor and an Aprilaire ® Automatic Digital Humidifier Control ( ...
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Aprilaire 8570 - page 5
(2) OPEN THE THERMOST A T Use your hands to pull the thermostat face off of the base. Separate one side at a time. There are latches on either side of the thermostat. If needed, the thermostat can be pried from the base by inserting a flat-head screwdriver (see Figure 3 ). - 4 - - 5 - CAUTION Loss of internal programs may result from static dischar ...
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Aprilaire 8570 - page 6
If installing this thermostat as part of a Model 6504 Intelligent Zoned Comfort System, refer to the Model 6504 Installation Manual for wiring and checkout procedures. Continue Model 6504 installation with Step 11 (page 36). If wiring this thermostat directly to the HV AC equipment or standard zone control panel, continue with Step 5. - 6 - - 7 - ( ...
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Aprilaire 8570 - page 7
IDS ODT APRILAIRE MODEL 8570 THERMOST A T 1ST STG COOL AIR CONDITIONER Y1 C FA N RELA Y 1ST ST AGE HEA T R FURNACE C G Y1 W1 1ST ST AGE COOL L1 L2 120 VA C 24 VA C GND ZA ZB I+ I- 6504 CONNECTION B O Y2 Y1 G RC R RH W1 W2 C AHC CONNECTION ELECT/GAS - SET TO ELECT FOR ELECTRIC HEA T , SET TO GAS FOR FOSSIL FUEL HEA T THERMOST A T CONFIGURA TION SWIT ...
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Aprilaire 8570 - page 8
APRILAIRE MODEL 8570 THERMOST A T 2ND STG COOL 1ST STG COOL TWO-ST A GE AIR CONDITIONER Y2 C Y1 FA N RELA Y 1ST ST AGE HEA T R TWO-ST A GE FURNACE C G Y2 Y1 W1 W2 2ND ST AGE COOL 1ST ST AGE COOL L1 L2 120 VA C 24 VA C 2ND ST AGE HEA T SUPPLIED JUMPER ZA ZB I+ I- 6504 CONNECTION B O Y2 Y1 G RC R RH W1 W2 C AHC CONNECTION ELECT/GAS - SET TO ELECT FOR ...
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Aprilaire 8570 - page 9
APRILAIRE MODEL 8570 THERMOST A T 1ST STG COOL AIR CONDITIONER Y1 C FA N RELA Y 1ST ST AGE HEA T R FURNACE C G Y1 W1 1ST ST AGE COOL L1 L2 120 VAC 24 VAC HEA T RELA Y R RADIANT FLOOR HEA T C W L1 L2 120 VAC 24 VAC 1 2 4 5 7 8 W R Y 24V COM E/W2 Y O 3 6 9 MODEL 8024 24-VOL T RELA Y P ACK (not supplied) SUPPLIED JUMPER ZA ZB I+ I- 6504 CONNECTION B O ...
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Aprilaire 8570 - page 10
APRILAIRE MODEL 8570 THERMOST A T FA N RELA Y 1ST ST AGE AUX . H EAT R INDOOR UNIT - AIR HANDLER C G Y1 W1 W2 L1 L2 120 VAC 24 VAC 2ND ST AGE AUX . H EAT L O Y1 W1 C R 1ST ST AGE COMP. REV . VA L V E DEFROST SERVICE OUTDOOR UNIT - HEA T PUMP SUPPLIED JUMPER COMPRESSOR ZA ZB I+ I- 6504 CONNECTION B O Y2 Y1 G RC R RH W1 W2 C AHC CONNECTION SINGLE/MUL ...
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Aprilaire 8570 - page 11
APRILAIRE MODEL 8570 THERMOST A T FA N RELA Y 1ST ST AGE AUX . H EAT R INDOOR UNIT - AIR HANDLER C G Y2 Y1 W1 W2 L1 L2 120 VAC 24 VAC 2ND ST AGE EMER. HEA T L O Y2 Y1 W1 C R 1ST ST AGE COMP. 2ND ST AGE COMP. REV . VA L V E DEFROST SERVICE OUTDOOR UNIT - HEA T PUMP SUPPLIED JUMPER 1ST ST AGE COMP . 2ND ST AGE COMP . ZA ZB I+ I- 6504 CONNECTION B O Y ...
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Aprilaire 8570 - page 12
- 19 - - 18 - (7) OPTIONAL – INST ALL AN APRILAIRE MODEL 8052 OUTDOOR TEMPERA TURE SENSOR Note: If an ADHC is to be installed, do not wire an outdoor temperature sensor– see Step 8. The ADHC uses its own outdoor temperature sensor , which can be read by the thermostat. 1. Mount the outdoor temperature sensor (see Figure 7 ). • Locate on the N ...
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Aprilaire 8570 - page 13
Figure 8 - 21 - - 20 - 2. Run a 2-wire cable from the sensor to the thermostat. 3. T ake a resistance measurement before connecting to the ODT and CIR GND terminals to verify the sensor is properly installed. Measure the wires at the thermostat to account for wire splices. • Use an ohmmeter to measure the resistance (k Ω ) of the sensor . The r ...
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Aprilaire 8570 - page 14
T o Humidifier Automatic Digital Humidifier Control Outdoor T emperature Sensor Note: ADHC must be powered by a continuous supply - do not wire to furnace accessory terminals. T ransformer Model 8570 Thermostat R C A B ODT Cf W/G H Figure 9 - 23 - Note: The ADHC uses its own outdoor temperature sensor , which is read by the thermostat. If an ADHC i ...
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Aprilaire 8570 - page 15
- 25 - Figure 10 1. Mount the indoor temperature sensor . • Locate the sensor as you would locate a thermostat. • Maximum wire length from sensor to thermostat is 300 feet. • Follow the installation instructions provided with the sensor . 2. Run a 2-wire cable from the sensor to the thermostat. 3. T ake a resistance measurement before connect ...
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Aprilaire 8570 - page 16
NOTE: Refer to the Owner’ s Manual for thermostat operating instructions. 1. PLACE THE THERMOST A T ON THE BASE. 2. TURN ON POWER TO THE HV AC SYSTEM. 3. THERMOST A T SET UP – HEA T ONL Y OR COOL ONL Y APPLICA TIONS Skip this step if the thermostat is to control both heating and cooling. 1. Make sure the thermostat is in the OFF mode. 2. Press ...
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Aprilaire 8570 - page 17
Symptom Cause Miswiring – Check wire colors to verify A at ADHC is connected to ZA at thermostat and B is connected to ZB. No RH display , no outdoor ADHC power source – When wired to the Model 8570 thermostat, the ADHC temperature display must be wired to a continuously ON power source. Use voltmeter to verify presence of 24V AC (nominal) at A ...
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Aprilaire 8570 - page 18
Symptom Cause Thermostat does not call for heat Minimum-off times. Change the mode to OFF first, then change the mode to HEA T and make a call for heat. Heating does not come on at all RH terminal not connected – see wiring diagrams. Heating equipment power not on. High Balance point limit – set balance point to OFF during system checkout. Auxi ...
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Aprilaire 8570 - page 19
- 32 - - 33 - Symptom Cause Thermostat does not call for cooling Minimum-off times. Change the mode to OFF first, then change the mode to COOL and make a call for cooling. Cooling does not come on at all RC terminal not connected – see wiring diagrams. Cooling equipment power not on. Heat comes on instead of cooling O/B dip switch not set properl ...
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Aprilaire 8570 - page 20
- 34 - - 35 - Symptom Cause Thermostat does not call for heat Minimum-off times. Change the mode to OFF first, then change the mode to EMERGENCY HEA T and make a call for heat. Emergency Heat does not come on at all RH terminal not connected – see wiring diagrams. Heating equipment power not on. Fan comes on before heat starts, or Change position ...
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Aprilaire 8570 - page 21
2. DIFFERENTIALS Determines the temperature above/below the temperature setting at which the heating or cooling equipment will turn on. For example, a heat temperature setting of 70°F with a differential of 2° will result in the equipment turning on and off to maintain the temperature between 68°F and 70°F . If the second stage differential is ...
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Aprilaire 8570 - page 22
5. PROGRESSIVE RECOVERY Progressive Recovery causes the thermostat to bring on the heating/cooling equipment before the programmed event start time, in order for the temperature to be at the programmed value by the programmed time. The feature can be turned on or off. When turned off, the heating/cooling equipment will not begin bringing the space ...
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Aprilaire 8570 - page 23
7. INPUT DEALER CONT ACT INFORMA TION During thermostat operation, the two multi-function buttons are labeled INFO and MENU. When the INFO button is pressed, the thermostat will display the humidity and temperature sensed by the ADHC (if an ADHC has been installed), then the thermostat will display any monitor messages and dealer contact informatio ...
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Aprilaire 8570 - page 24
- 43 - - 42 - 8. BLOWER EXTENSION FOR HUMIDITY CONTROL If the heating equipment has not run long enough to allow the humidifier to meet the humidity demand, the thermostat will continue the blower after a heat call. One second before the thermostat turns off the heating terminal(s), the fan terminal will be energized thus extending blower operation ...
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Aprilaire 8570 - page 25
10006198 11.07 997-040090-3 B2203358D Printed in U.S.A. RESEARCH PRODUCTS CORPORA TION P .O. BOX 1467 • MADISON,WI 53701-1467 ...
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