Aprilaire 8570 Setup guide

Premium Programmable Thermostat
Safety & Installation
Instructions
Model 8570
READ AND SAVE THESE INSTRUCTIONS

TABLE OF CONTENTS
PAGE
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
WIRE REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . . 2
1. SELECT A MOUNTING LOCATION. . . . . . . . . . . 3
2. OPEN THE THERMOSTAT . . . . . . . . . . . . . . . . . . 4
3. MOUNT THE THERMOSTAT BASE
TO THE WALL . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. SET THE CONFIGURATION DIP SWITCHES
ON THE THERMOSTAT CIRCUIT BOARD . . . . . 6
PAGE
5. WIRE THE THERMOSTAT TO THE
HVAC EQUIPMENT . . . . . . . . . . . . . . . . . . . . . . . . 8
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 OUTDOOR
TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . 16

PAGE
7. OPTIONAL – INSTALL AN AUTOMATIC
HUMIDIFIER CONTROL (AHC) . . . . . . . . . . . . . 19
8. OPTIONAL – INSTALL AN INDOOR
TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . . 21
9. THERMOSTAT STARTUP . . . . . . . . . . . . . . . . . . 23
Verify Outdoor Temperature Sensor . . . . . . . . . . . 24
Check Fan Operation . . . . . . . . . . . . . . . . . . . . . . . 24
Verify AHC Connection . . . . . . . . . . . . . . . . . . . . . 24
Check Heating Operation . . . . . . . . . . . . . . . . . . . 26
Check Cooling Operation . . . . . . . . . . . . . . . . . . . 28
Check Emergency Heat Operation
(Heat Pumps Only) . . . . . . . . . . . . . . . . . . . . . . . . 29
PAGE
10. CUSTOMIZE THE
APPLICATION SETTINGS . . . . . . . . . . . . . . . . 30
Differential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Progressive Recovery . . . . . . . . . . . . . . . . . . . . . 31
Balance Points (Heat Pumps Only) . . . . . . . . . . . 32
Input Dealer Contact Information . . . . . . . . . . . . 33
Blower Extension for Humidity Control . . . . . . . 34
Monitors – Air Filter, Service Humidifier,
UV Lamp, Service HVAC . . . . . . . . . . . . . . . . . . . 35

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. This product must be installed by a qualified
heating and air conditioning contractor in accordance with NEC Standards and applicable local and state codes.
3. 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.
Read this Installation Manual before beginning installation of the Aprilaire®8570 Thermostat. For questions call
Research Products Corporation at [phone].
SAFETY INSTRUCTIONS

- 1 -
MODEL 8570 SPECIFICATIONS
Electrical
Thermostat Voltage: 24-volts ± 20% AC or DC
Total Load Current: 2A
Single Output Load Current: 1A
Solid State Output Residual Current: Less than 5 mA
Voltage Drop at Solid State Outputs: Less than 1-volt
Thermal
Operating Range: 32°F – 99°F (0 C – 37 C)
Display Accuracy: ±1°F between 60°F and 80°F, ±2°F outside this range
Control Accuracy: ±1°F
Control Range Heat: 40°F – 88°F (4 C – 30 C)
Control Range Cool: 42°F – 90°F (6 C – 32 C)
Heat/Cool Deadband: 2°F or C
1st Stage Differential: Adjustable 1°F – 3°F (1°F default)
2nd Stage Differential: Adjustable 1°F – 3°F (1°F default)
Temperature Offset: Adjustable 1°F – 4°F

- 2 -
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.
When this thermostat is connected to a Model 6504 as
shown in Figure 2, only one four-wire cable need be run
from the thermostat to the Model 6504. Use standard
18-24 gauge thermostat cable.
OPTIONAL –
AUTOMATIC
HUMIDIFIER
CONTROL
(AHC)
HVAC
EQUIPMENT
MODEL 8570
THERMOSTAT
SEE
TABLE
2-WIRES
2-WIRES
2-WIRES
OPTIONAL –
OUTDOOR
TEMPERATURE
SENSOR
OPTIONAL –
INDOOR
TEMPERATURE
SENSOR
MODEL 8570
THERMOSTAT MODEL 65044-WIRES
Application # Wires Diagram (Page)
Single-Stage Furnace/AC 5 1 (9)
Two-Stage Furnace/AC 7 2 (10)
Two-Stage Roof Top Unit 7 3 (11)
Boiler w/AC (2-transformer) 6 4 (12)
Radiant 1st Stage Heat, 6 5 (13)
Furnace 2nd Stage and AC
Single-Stage Heat Pump 6 6 (14)
Two-Stage Heat Pump 8 7 (15)
WIRE REQUIREMENTS
Figure 1 – Thermostat Wire
Figure 2 – Model 6504 Wire

- 3 -
(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).
• DO NOT mount the thermostat:
– behind doors, in corners or other dead air spaces.
– in direct sunlight or near lamps, appliances or other
sources of heat.
– on an outside wall or wall exposed to an unconditioned
space (i.e. garage).
– in the flow path of a supply register, in stairways or near
outside doors.
– on a wall where concealed pipes or ductwork could
influence the sensor.
– near sources of electrical interference such as arcing
switch contacts.
If installing an indoor temperature sensor…
• Mount the thermostat where it can be readily accessed.
Note that the backlighting illuminates whenever a button
is pressed.
• Thermostat can be mounted on a vertical junction box (j-box).
• DO NOT mount the thermostat where the operating range
temperatures will be exceeded (i.e. attic or unventilated
equipment room).
• Mount the sensor in the same location as if installing a
thermostat alone.

(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).
- 4 -
CAUTION
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.
INSERT SCREWDRIVER INTO 1 OF
4 SLOTS (2 ARE ON THE TOPSIDE,
2 ARE ON THE BOTTOM SIDE)
USE THE SCREWDRIVER TO SEPARATE THE
HOUSINGS. REPEAT ON THE REMAINING 3 SLOTS.
NOTE: THE HOUSINGS WILL NOT COMPLETELY
SEPARATE. PULL THE HOUSINGS APART WITH
YOUR HANDS TO COMPLETELY SEPARATE.
Figure 3

- 5 -
(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.
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.
• Drill a 3/32" starter hole for screws only.
3. For junction box mounting, screws are field supplied.
The thermostat can be installed on a vertical j-box.
4. Seal the wire entry hole(s) with caulk, drywall putty
or insulation to prevent drafts from inside the wall
cavity from affecting thermostat performance.
CIR
GND
IDS
ODT
ZA
ZB
C
W2
W1
RH
R
RC
G
Y1
Y2
B
O
I+
I
-
CAUTION
Minimize wire entry hole size and seal the hole – drafts from inside the wall could affect temperature readings.
Figure 4

- 6 -
(4) SET THE CONFIGURATION DIP SWITCHES ON THE THERMOSTAT CIRCUIT BOARD
ON
H/C
GAS
MULTI
6504
HP
ELEC
AHC
SINGLE
Figure 5
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.

If installing this thermostat as part of a Model 6504 Intelligent Zone System, refer to the Model 6504
Installation Manual for wiring and checkout procedures. Continue Model 6504 installation with Step 10 (page 30).
If wiring this thermostat directly to the HVAC equipment or standard zone control panel, continue with Step 5.
- 7 -
STOP!
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).
• Set to GAS when the heat source is fossil fuel (oil, propane,
natural gas). For heat pumps, when set to FOSSIL, the
compressor terminal(s) will de-energize before the auxiliary
heat terminal (W1) is energized, thus acting as a fossil fuel kit.
MULTI or SINGLE – When set to single, the second stage
outputs (Y2 and W2) do not energize.
• Set to SINGLE for single-stage furnace/AC applications or
single-stage compressor heat pump systems.
• Set to MULTI if the furnace or air conditioner is two-stage
or if the heat pump has a two-stage compressor.
HEAT/COOL or HEAT PUMP – When set to HP the compressor
terminal (Y1) is the first stage output for both heating and cooling.
• Set to HP when installed with heat pumps.
• Set to H/C when installed with furnace/AC systems,
roof top units or boiler/AC combination systems.

- 8 -
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. Strip no more insulation than is required to make a
sound electrical connection at the HVAC equipment.
4. Wire the thermostat to the HVAC equipment according
to the wiring schematic appropriate for your HVAC
equipment.
(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.
Application # Wires Diagram (Page)
Single-Stage Furnace/AC 5 1 (9)
Two-Stage Furnace/AC 7 2 (10)
Two-Stage Roof Top Unit 7 3 (11)
Boiler w/AC (2-transformer) 6 4 (12)
Radiant 1st Stage Heat, 6 5 (13)
Furnace 2nd Stage and AC
Single-Stage Heat Pump 6 6 (14)
Two-Stage Heat Pump 8 7 (15)

- 9 -
Diagram 1: Single-Stage Furnace and AC

- 10 -
Diagram 2: Two-Stage Furnace and AC

- 11 -
Diagram 3: Two-Stage Roof Top Unit

- 12 -
Diagram 4: Boiler with AC

- 13 -
Diagram 5: Radiant Floor 1st Stage Heat with Furnace 2nd Stage Heat and AC

- 14 -
Diagram 6: Single-Stage Heat Pump

- 15 -
Diagram 7: Two-Stage Heat Pump

- 16 -
(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.
• Mount at least 3 feet away from exhaust
vents and condensing units.
• Maximum wire length from sensor to
thermostat is 300 feet.
• Under a soffit or under a wall overhang are
recommended areas for mounting the sensor.
• Follow any additional location requirements
found on sensor installation instructions.
NORTH, EAST
OR WEST SIDE
OF BUILDING
SENSOR WITH
BRACKET
ABOVE SNOW LINE
Figure 6