Premium Programmable Thermostat Safety & Installation Instructions Model 8570 READ AND SAVE THESE INSTRUCTIONS
TABLE OF CONTENTS PAGE PAGE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 5. WIRE THE THERMOSTAT TO THE HVAC EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . 8 WIRE REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . 2 Diagram 1 – Single-Stage Furnace and AC . . . . . . 9 1. SELECT A MOUNTING LOCATION. . . . . . . . . . . 3 Diagram 2 – Two-Stage Furnace and AC . . . . . . 10 2. OPEN THE THERMOSTAT . . . . . . . . . . . . . . . . .
PAGE PAGE 7. OPTIONAL – INSTALL AN AUTOMATIC HUMIDIFIER CONTROL (AHC) . . . . . . . . . . . . . 19 10. CUSTOMIZE THE APPLICATION SETTINGS . . . . . . . . . . . . . . . 30 8. OPTIONAL – INSTALL AN INDOOR TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . 21 Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 9. THERMOSTAT STARTUP . . . . . . . . . . . . . . . . . 23 Progressive Recovery . . . . . . . . . . . . . . . . . . . . 31 Verify Outdoor Temperature Sensor . . . . . . . .
SAFETY INSTRUCTIONS Read this Installation Manual before beginning installation of the Aprilaire® 8570 Thermostat. For questions call Research Products Corporation at (800) 334-6011. WARNING 1. 120 Volts 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.
MODEL 8570 SPECIFICATIONS Electrical Thermostat Voltage: Total Load Current: Single Output Load Current: Solid State Output Residual Current: Voltage Drop at Solid State Outputs: 24-volts ± 20% AC or DC 2A 1A Less than 5 mA Less than 1-volt Thermal Operating Range: Display Accuracy: Control Accuracy: Control Range Heat: Control Range Cool: Heat/Cool Deadband: 1st Stage Differential: 2nd Stage Differential: Temperature Offset: 32°F – 99°F (0 C – 37 C) ±1°F between 60°F and 80°F, ±2°F outside this range ±1
WIRE REQUIREMENTS 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 Zone System). Figure 1 shows optional connections to both an outdoor temperature sensor and an Aprilaire® Automatic Humidifier Control (AHC), but only one or the other can be used. All wire is standard 18-24 gauge thermostat cable.
(1) SELECT A MOUNTING LOCATION If installing the thermostat alone… • Mount on an interior wall, in a frequently occupied space. • Keep the thermostat 18" from an outside wall. • Mount the thermostat approximately 5 feet above the floor. Height requirements are different for compliance with the Americans with Disabilities Act (ADA) – 48" maximum height for forward reach and 54" maximum height for side reach. • Thermostat can be mounted to a vertical junction box (j-box).
(2) OPEN THE THERMOSTAT 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). CAUTION Figure 3 Loss of internal programs may result from static discharge to thermostat circuit board. Avoid touching the circuit board and touch a grounded metal object before handling the thermostat.
(3) MOUNT THE THERMOSTAT BASE TO THE WALL 1. Place the wire opening in the base over the wire entry hole in the wall. Level the base (for appearance only) and mark the screw locations. See Figure 4. Figure 4 2. Use the supplied screws and wall anchors to mount the thermostat to the wall. It is recommended that wall anchors be used for installation to drywall/sheet rock. • Drill a 3/16" hole for wall anchors. W2 W1 RH • Drill a 3/32" starter hole for screws only. R RC 3.
(4) SET THE CONFIGURATION DIP SWITCHES ON THE THERMOSTAT CIRCUIT BOARD There are four dip switches located on the back of the thermostat (on the circuit board) that must be set to properly configure the thermostat for operation with the equipment it is to control. Figure 5 shows the default position for the four switches.
6504 or AHC – This switch is used to configure the thermostat installation as part of a Model 6504 Intelligent Zone System. • Set to 6504 only if installing as part of a Model 6504 Intelligent Zone System. • Set to AHC if the thermostat is to be wired to the HVAC equipment or standard zone system. GAS or ELEC – When set to ELEC, the fan terminal (G) will be energized on a call for heat. • Set to ELEC when the heat source is electric (such as strip heat).
(5) WIRE THE THERMOSTAT TO THE HVAC EQUIPMENT WARNING 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. 1. Run a cable with the correct number of wires (see table) from the thermostat to the HVAC equipment. 2. Strip 1/4" of insulation from the end of the wires to be connected to the thermostat. 3.
Diagram 1: Single-Stage Furnace and AC -9-
Diagram 2: Two-Stage Furnace and AC - 10 -
Diagram 3: Two-Stage Roof Top Unit - 11 -
Diagram 4: Boiler with AC - 12 -
Diagram 5: Radiant Floor 1st Stage Heat with Furnace 2nd Stage Heat and AC - 13 -
Diagram 6: Single-Stage Heat Pump - 14 -
Diagram 7: Two-Stage Heat Pump - 15 -
(6) OPTIONAL – INSTALL AN APRILAIRE MODEL 8052 OUTDOOR TEMPERATURE SENSOR Note: If an AHC is to be installed, do not wire an outdoor temperature sensor– see Step 7. The AHC uses its own outdoor temperature sensor, which can be read by the thermostat. 1. Mount the outdoor temperature sensor (see Figure 6). • Locate on the North side of the building if possible. East and West are acceptable locations as long as the sensor will not be exposed to direct sunlight. • Mount above anticipated snow line.
2. Run a 2-wire cable from the sensor to the thermostat. CAUTION Do not run the wire along side line voltage (120 VAC) or higher lines as this can cause erratic readings. 3. Take 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 (kΩ) of the sensor. The resistance reading will depend on the outdoor temperature (see table). 4.
Figure 7 IDS ODT CIR GND ZA ZB C - 18 -
(7) OPTIONAL – INSTALL AN AUTOMATIC HUMIDIFIER CONTROL (AHC) Note: The AHC uses its own outdoor temperature sensor, which is read by the thermostat. If an AHC is to be installed, do not wire an outdoor temperature sensor to the ODT terminal of the thermostat. 1. Mount the AHC and its outdoor temperature sensor. • Follow the directions provided with the AHC except do not mount the AHC temperature sensor in a fresh air intake. The temperature sensor must be mounted outside.
NOR MA L Figure 8 6 7 T RE ES S 4 POWER C 3 F B BYPASS A OFF T/ T E 5 O 2 I+ I- R C 24V H ODT 1 AUTOMATIC MODE B2203201 Rev. B AHC must be powered by a continuous supply – do not wire to furnace accessory terminals.
(8) OPTIONAL – INSTALL AN APRILAIRE MODEL 8051 INDOOR FLUSH MOUNT TEMPERATURE SENSOR 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. Take a resistance measurement before connecting to the IDS and CIR GND terminals to verify the sensor is properly installed.
Figure 9 IDS ODT CIR GND ZA ZB C - 22 -
(9) THERMOSTAT STARTUP – STAND ALONE APPLICATIONS EQUIPMENT STATUS MESSAGE CENTER OUTDOOR TEMPERATURE SETPOINTS ROOM TEMPERATURE UP/DOWN BUTTONS MULTI-FUNCTION BUTTONS - 23 -
• If an AHC has been installed, allow the fan to operate for no less than 40 seconds. If an AHC is not part of this installation, you can turn the fan off at any time. A humidity value can be displayed only after at least 40 seconds of blower run-time to ensure the humidity reading is representative of the room air. NOTE: Refer to the Owner’s Manual for thermostat operating instructions. 1. PLACE THE THERMOSTAT ON THE BASE. 2. TURN ON POWER TO THE HVAC SYSTEM.
TROUBLESHOOTING – AHC CONNECTION Symptom Cause Miswiring – Check wire colors to verify I- at AHC is connected to I- at thermostat and I+ is connected to I+. No RH display, no outdoor temperature display AHC power source – When wired to the Model 8570 thermostat, the AHC must be wired to a continuously ON power source. Use voltmeter to verify presence of 24VAC (nominal) at AHC. AHC not operating correctly – check red diagnostic light on AHC.
6. CHECK HEATING OPERATION • Wait for 2nd Stage: Notes: – Furnace, Boiler: Minimum-on time for 1st stage is 2 minutes. 1. To avoid the minimum off times during system checkout, always start and end the check out procedure in the OFF mode. • W1, W2 (and G if GAS/ELEC dip switch set to the ELEC position) will energize. 2. Do not operate heat pumps in the heating mode at high outdoor temperatures for extended periods of time. – Heat pumps: Minimum-on time for 1st stage is 4 minutes.
TROUBLESHOOTING – HEATING OPERATION Symptom Cause Thermostat does not call for heat Minimum-off times. Change the mode to OFF first, then change the mode to HEAT and make a call for heat. Heating does not come on at all Auxiliary Heat does not come on RH terminal not connected – see wiring diagrams. Heating equipment power not on. High Balance point limit – set balance point higher than outdoor temperature or disconnect outdoor temperature sensor during system checkout.
7. CHECK COOLING OPERATION • Set the thermostat to the COOL mode: Notes: – The O terminal will energize when in the Cool mode. 1. To avoid the minimum off times during system checkout, always start the check out procedure in the OFF mode. 2. Do not operate air conditioning at low outdoor temperatures. Refer to equipment manufacturer’s recommendations for safe operating temperatures. • Lower the cool setting to 5° below the room temperature to initiate a 1st stage cool call.
8. CHECK EMERGENCY HEAT OPERATION (Heat Pumps Only) Notes: 1. To avoid the minimum off times during system checkout, always start the check out procedure in the OFF mode. • Raise the heat setting to 5° higher than the room temperature to initiate a 1st stage heat call. The mode display will change from “E-HEAT MODE” to “HEATING”, which will flash when the thermostat is calling for heat: – W1 (and G if GAS/ELEC dip switch is set in the ELEC position) terminals will energize.
(10) CUSTOMIZE THE APPLICATION SETTINGS 1. DIFFERENTIAL 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 also 2°, the second stage would be used to ensure the temperature did not drop below 66°.
2. OFFSET All thermostats are factory calibrated to be accurate to within ±1° of true temperature. An offset is available to allow for agreement with field temperature measuring instruments. The value set will be added to the temperature sensed by the thermostat. The result will be displayed on the thermostat and will be used as the control value. To change the offset: 1. Make sure the thermostat is in the OFF mode. 2. Press and hold both the ▲ and ▼ buttons for 3 seconds. – The display will show the ADV.
4. BALANCE POINTS (HEAT PUMPS ONLY) This feature is only available when the thermostat has been configured to operate heat pumps (see SET THE CONFIGURATION DIP SWITCHES on page 6) and only when an outdoor temperature is available to the thermostat. Outdoor temperature can come from an AHC or from an outdoor temperature sensor. The low balance point is the outdoor temperature at or below which the thermostat will lockout the compressor(s) – only auxiliary heat will be used to satisfy heating demands.
5. INPUT DEALER CONTACT INFORMATION 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 AHC (if an AHC has not been installed the Aprilaire logo screen will appear), then the thermostat will display the thermostat model number and contact information. At installation, the contact information is blank and only the thermostat model number appears.
6. 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. If the fan terminal was on as part of the heat call it will remain on, if it was not on it will be turned on.
7. MONITORS – AIR FILTER, SERVICE HUMIDIFIER, UV LAMP, SERVICE HVAC The thermostat monitors time and can display scheduled reminders for the user to service their humidifier, change their filter and UV lamps, and to remind the user to schedule an HVAC system maintenance check. All monitors are strictly time based, so setting a filter monitor to three months will result in the change reminder being displayed in three months, regardless of how much the HVAC system has run in that period.
DP #10006198 B2203358A P.O. BOX 1467 • MADISON, WI 53701-1467 Printed in U.S.A.
