Aprilaire Thermostat 8570 User Manual

SAFETY INSTRUCTIONS

MODEL 8570 SPECIFICATIONS

Read this Installation Manual before beginning installation of the Aprilaire^®8570 Thermostat. For questions call

Research Products Corporation at (800) 334-6011.

Electrical

Thermostat Voltage:

24-volts 20% AC or DC

WARNING

Total Load Current:

5A

2A

Single Output Load Current:

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.

Thermal

Operating Range:

Display Accuracy:

32°F – 99°F (0 C – 37 C)

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.

1°F between 60°F and 80°F, 2°F outside this range

1°F

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.

Control Accuracy:

Control Range Heat:

Control Range Cool:

Heat/Cool Deadband:

1st Stage Differential:

2nd Stage Differential:

Temperature Offset:

40°F – 88°F (4 C – 30 C)

42°F – 90°F (6 C – 32 C)

Adjustable 2° or 5° F or C

Adjustable 1°F – 4°F (1°F default)

Adjustable 1°F – 4°F

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WIRE REQUIREMENTS

(1) SELECT A MOUNTING LOCATION

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 (ADHC), but only one or the other is

necessary. All wire is standard 18-24 gauge thermostat cable.

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.

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).

Application

# Wires

Diagram (Page)

1 (9)

Figure 1 – Thermostat Wire

• 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.

Single-Stage Furnace/AC

Two-Stage Furnace/AC

Two-Stage Roof Top Unit

Boiler w/AC (2-transformer)

5

7

6

OPTIONAL –

AUTOMATIC

DIGITAL HUMIDIFIER

CONTROL

2 (10)

HVAC

EQUIPMENT

3 (11)

(ADHC)

4 (12)

SEE

OPTIONAL –

INDOOR

TEMPERATURE

SENSOR

Radiant 1st Stage Heat,

Furnace 2nd Stage and AC

5 (13)

OPTIONAL –

OUTDOOR

2-WIRES

TABLE

TEMPERATURE

SENSOR

Single-Stage Heat Pump

6

7

6 (14)

7 (15)

2-WIRES

Single-Stage Heat Pump

w/Two Stages Aux. Heat

MODEL 8570

THERMOSTAT

Two-Stage Heat Pump

8

8 (16)

– on a wall where concealed pipes or ductwork could

influence the sensor.

– near sources of electrical interference such as arcing

switch contacts.

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.

Figure 2 –

Model 6504

Wire

MODEL 8570

THERMOSTAT

4-WIRES

MODEL 6504

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(2) OPEN THE THERMOSTAT

(3) MOUNT THE THERMOSTAT BASE TO THE WALL

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.

1. Place the wire opening in the base over the wire entry

hole in the wall. Level the base (for appearance only)

Figure 4

and mark the screw locations. See Figure 4.

If needed, the thermostat can be pried from the base by inserting a flat-head screwdriver (see Figure 3).

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.

CAUTION

Figure 3

Loss of internal programs

may result from static

discharge to thermostat

circuit board. Avoid

• 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.

touching the circuit board

and touch a grounded

metal object before

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.

handling the thermostat.

90-1027

USE THE SCREWDRIVER TO SEPARATE THE

CAUTION

HOUSINGS. REPEAT ON THE REMAINING 3 SLOTS.

INSERT SCREWDRIVER INTO 1 OF

4 SLOTS (2 ARE ON THE TOPSIDE,

2 ARE ON THE BOTTOM SIDE)

NOTE: THE HOUSINGS WILL NOT COMPLETELY

SEPARATE. PULL THE HOUSINGS APART WITH

YOUR HANDS TO COMPLETELY SEPARATE.

Minimize wire entry hole size and seal the hole – drafts from inside the wall could affect temperature readings.

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MULTI or SINGLE – When set to single, the second stage

GAS or ELECT – When set to ELECT, the fan terminal (G) will

outputs (Y2 and W2) do not energize.

be energized on a call for heat.

(4) SET THE CONFIGURATION DIP SWITCHES ON THE THERMOSTAT CIRCUIT BOARD

• Set to SINGLE for single-stage furnace/AC applications or

single-stage compressor heat pump systems.

• Set to ELECT when the heat source is electric

(such as strip heat).

There are four dip switches

located on the back of the

Figure 5

• Set to MULTI if the furnace or air conditioner is two-stage

or if the heat pump has a two-stage compressor.

• Set to GAS when the heat source is fossil fuel (oil, propane,

natural gas). For heat pumps, the compressor terminal(s)

will de-energize before the auxiliary heat terminal (W1) is

energized, thus acting as a fossil fuel kit.

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.

HEAT/COOL or HEAT PUMP – When set to HP the compressor

terminal (Y1) is the first stage output for both heating and cooling.

O or B – For heat pumps only, this switch sets whether the

O/B reversing valve output is energized during a cooling call

or heating call.

• 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.

• Set to O if heat pump reversing valve is to be energized

in cooling.

• Set to B if heat pump reversing valve is to be energized

in heating.

MULTI

HC

SINGLE

HP

GAS

B

ELECT

O

STOP!

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 HVAC equipment or standard zone control panel, continue with Step 5.

90-1028

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APRILAIRE MODEL

8570 THERMOSTAT

SUPPLIED JUMPER

(5) WIRE THE THERMOSTAT TO THE HVAC EQUIPMENT

W2

W1

RH

R

RC

G

Y1

Y2

B

FURNACE

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

1ST

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.

WARNING

STAGE

HEAT

W1

Y1

1

SINGLE

HP

MULTI

HC

2

3

4

1ST STAGE

COOL

ELECT

O

GAS

B

FAN

1. Run a cable with the correct number of wires

(see table) from the thermostat to the HVAC equipment.

G

C

R

Application

# Wires

Diagram (Page)

1 (9)

RELAY

ELECT/GAS - SET TO

ELECT FOR ELECTRIC

HEAT, SET TO GAS FOR

FOSSIL FUEL HEAT

O

C

Single-Stage Furnace/AC

Two-Stage Furnace/AC

Two-Stage Roof Top Unit

Boiler w/AC (2-transformer)

5

7

6

2. Strip 1/4" of insulation from the end of the wires to

be connected to the thermostat.

24

VAC

2 (10)

I+

I-

AHC

CONNECTION

3 (11)

3. Strip no more insulation than is required to make a

sound electrical connection at the HVAC equipment.

120

VAC

4 (12)

ZB

ZA

6504

CONNECTION

Radiant 1st Stage Heat,

Furnace 2nd Stage and AC

5 (13)

4. Wire the thermostat to the HVAC equipment according

to the wiring schematic appropriate for your HVAC

equipment.

OUTDOOR (ODT)

& INDOOR (IDS)

1ST

STG

COOL

GND

Single-Stage Heat Pump

6

7

6 (14)

7 (15)

Y1

ODT TEMPERATURE

IDS

SENSORS

Single-Stage Heat Pump

w/Two Stages Aux. Heat

C

EVENT

TRIGGERED

OUTPUT

(ETO)

COM

NO

NC

Two-Stage Heat Pump

8

8 (16)

AIR CONDITIONER

Diagram 1: Single-Stage Furnace and AC

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APRILAIRE MODEL

8570 THERMOSTAT

SUPPLIED JUMPER

TWO-STAGE FURNACE

2ND

APRILAIRE MODEL

8570 THERMOSTAT

TWO-STAGE ROOF TOP UNIT

(RTU)

SUPPLIED

JUMPER

W2

W1

RH

R

RC

G

Y1

Y2

B

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

STAGE

HEAT

W2

W1

RH

R

RC

G

Y1

Y2

B

2ND

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

1ST

STAGE

HEAT

STAGE

HEAT

W2

W1

Y1

Y2

1ST

STAGE

HEAT

1

SINGLE

HP

MULTI

HC

1ST STAGE

COOL

2

3

4

1

SINGLE

HP

MULTI

HC

1ST

2ND STAGE

COOL

ELECT

O

GAS

B

2

3

4

STAGE

COOL

Y1

Y2

ELECT

O

GAS

B

2ND

STAGE

COOL

FAN

RELAY

G

C

R

ELECT/GAS - SET TO

ELECT FOR ELECTRIC

HEAT, SET TO GAS FOR

FOSSIL FUEL HEAT

O

C

ELECT/GAS - SET TO

ELECT FOR ELECTRIC

HEAT, SET TO GAS FOR

FOSSIL FUEL HEAT

FAN

RELAY

24

VAC

O

C

G

C

R

I+

I-

AHC

CONNECTION

24

VAC

I+

I-

AHC

CONNECTION

120

VAC

ZB

ZA

6504

CONNECTION

ZB

ZA

6504

CONNECTION

120

VAC

OUTDOOR (ODT)

& INDOOR (IDS)

TEMPERATURE

SENSORS

GND

ODT

IDS

OUTDOOR (ODT)

& INDOOR (IDS)

TEMPERATURE

SENSORS

1ST

STG

GND

ODT

IDS

Y1

COOL

2ND

STG

EVENT

COM

NO

NC

Y2

C

TRIGGERED

OUTPUT

(ETO)

COOL

EVENT

COM

NO

NC

TRIGGERED

OUTPUT

(ETO)

TWO-STAGE AIR CONDITIONER

Diagram 2: Two-Stage Furnace and AC

Diagram 3: Two-Stage Roof Top Unit

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REMOVE RH PRONG

FROM SUPPLIED JUMPER

HEAT

RELAY

W

1

2

3

4

5

6

7

8

9

W

R

24V COM

E/W2

APRILAIRE MODEL

8570 THERMOSTAT

C

R

24

VAC

HEAT

RELAY

W

W2

W1

RH

R

RC

G

Y1

Y2

B

SUPPLIED JUMPER

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

C

R

24

VAC

120

VAC

Y

APRILAIRE MODEL

8570 THERMOSTAT

Y

BOILER

1

SINGLE

HP

MULTI

HC

120

VAC

W2

W1

RH

R

RC

G

Y1

Y2

B

2

3

4

O

ELECT

O

GAS

B

RADIANT FLOOR HEAT

FAN

RELAY

MODEL 8024 24-VOLT

RELAY PACK (not supplied)

G

1ST

STAGE

HEAT

W1

Y1

ELECT/GAS - SET TO

ELECT FOR HOT WATER

COIL HEAT, SET TO GAS

FOR RADIANT HEAT

1ST STAGE

COOL

O

C

1ST STAGE

COOL

Y1

FAN

RELAY

C

R

G

C

R

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

I+

I-

24

VAC

AHC

CONNECTION

O

C

24

VAC

1

SINGLE

HP

MULTI

HC

I+

I-

AHC

CONNECTION

ZB

ZA

6504

CONNECTION

120

VAC

2

3

4

ELECT

O

GAS

B

120

VAC

ZB

ZA

6504

CONNECTION

INDOOR AIR HANDLER

OUTDOOR (ODT)

& INDOOR (IDS)

GND

FURNACE

ELECT/GAS - SET TO

ELECT FOR ELECTRIC

FURNACE, SET TO GAS

FOR FOSSIL FUEL

FURNACE

ODT TEMPERATURE

OUTDOOR (ODT)

& INDOOR (IDS)

1ST

STG

COOL

GND

SENSORS

IDS

1ST

STG

COOL

Y1

ODT TEMPERATURE

Y1

SENSORS

EVENT

TRIGGERED

OUTPUT

IDS

COM

NO

C

COM

NO

NC

EVENT

TRIGGERED

OUTPUT

(ETO)

NC

(ETO)

AIR CONDITIONER

Diagram 4: Boiler with AC

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

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APRILAIRE MODEL

8570 THERMOSTAT

APRILAIRE MODEL

8570 THERMOSTAT

SUPPLIED JUMPER

SUPPLIED

JUMPER

INDOOR UNIT - AIR HANDLER

W2

W1

RH

R

RC

G

Y1

Y2

B

W2

W1

RH

R

RC

G

Y1

Y2

B

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

2ND STAGE

W2

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

1ST STAGE

W1

AUX. HEAT

1ST STAGE

W1

1

SINGLE

HP

MULTI

HC

AUX. HEAT

Y1

COMPRESSOR

1

SINGLE

HP

MULTI

HC

2

3

4

2

3

4

Y1

ELECT

O

GAS

B

COMPRESSOR

ELECT

O

GAS

B

FAN

RELAY

G

C

R

FAN

RELAY

G

C

R

SINGLE/MULTI – SET TO SINGLE

FOR SINGLE STAGE HEAT PUMP

SINGLE/MULTI – SET TO SINGLE

FOR SINGLE STAGE HEAT PUMP

O

C

O

C

24

VAC

24

VAC

ELECT/GAS - SET TO ELECT FOR

ELECTRIC AUXILIARY HEAT, SET

TO GAS FOR FOSSIL FUEL (DUAL

FUEL) AUXILIARY HEAT

ELECT/GAS - SET TO ELECT FOR

ELECTRIC AUXILIARY HEAT, SET

TO GAS FOR FOSSIL FUEL (DUAL

FUEL) AUXILIARY HEAT

I+

I-

AHC

CONNECTION

I+

I-

AHC

CONNECTION

120

VAC

120

VAC

O/B – SET TO “O” IF HEAT PUMP

REVERSING VALVE MUST BE

ENERGIZED WHEN COOLING,

SET TO “B” IF IT IS TO BE

ZB

ZA

6504

CONNECTION

O/B – SET TO “O” IF HEAT PUMP

REVERSING VALVE MUST BE

ENERGIZED WHEN COOLING,

SET TO “B” IF IT IS TO BE

ZB

ZA

6504

CONNECTION

W1

Y1

OUTDOOR (ODT)

& INDOOR (IDS)

W1

Y1

OUTDOOR (ODT)

& INDOOR (IDS)

GND

ENERGIZED IN HEATING

DEFROST

GND

ENERGIZED IN HEATING

ODT TEMPERATURE

IDS

ODT TEMPERATURE

IDS

1ST STAGE

AUXILIARY HEAT SET UP

1. WITH THERMOSTAT IN OFF

MODE, PRESS AND HOLD THE

UP AND DOWN BUTTONS FOR

3 SECONDS TO ENTER THE

ADVANCED SETTINGS MENU.

2. SCROLL DOWN AND

HIGHLIGHT THE “AUXILIARY

HEAT SETUP” OPTION AND

PRESS SELECT.

1ST STAGE

SENSORS

AUXILIARY HEAT SET UP

1. WITH THERMOSTAT IN OFF

MODE, PRESS AND HOLD THE

UP AND DOWN BUTTONS FOR

3 SECONDS TO ENTER THE

ADVANCED SETTINGS MENU.

2. SCROLL DOWN AND

HIGHLIGHT THE “AUXILIARY

HEAT SETUP” OPTION AND

PRESS SELECT.

COMP.

SENSORS

COMP.

EVENT

TRIGGERED

OUTPUT

(ETO)

COM

NO

NC

EVENT

TRIGGERED

OUTPUT

(ETO)

COM

NO

NC

REV.

VALVE

REV.

VALVE

O

L

SERVICE

R

Diagram 6: Single-Stage

Heat Pump with Single-Stage

Back Up Heat

Diagram 7: Single-Stage

Heat Pump with Two-Stage

Back Up Heat

3. HIGHLIGHT “ONE STAGE AUX

HEAT” AND PRESS SELECT

C

3. HIGHLIGHT “TWO STAGE AUX

HEAT” AND PRESS SELECT

C

OUTDOOR UNIT - HEAT PUMP

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INDOOR UNIT - AIR HANDLER

SUPPLIED JUMPER

APRILAIRE MODEL

8570 THERMOSTAT

2ND STAGE

W2

EMER. HEAT

W2

W1

RH

R

THERMOSTAT

CONFIGURATION

SWITCH SETTINGS

(6) OPTIONAL – WIRE THE EVENT TRIGGERED OUTPUT (ETO)

1ST STAGE

W1

AUX. HEAT

Terminals NO, COM and NC are the

Normally Open, Common and Normally

Closed outputs, respectively, of a relay

that can be used to control auxiliary

equipment. When the relay is on, a

circuit is complete between NO and

COM; when the relay is off a circuit is

complete between NC and COM. The

relay is programmed to be on or off,

with each of the programming events.

Examples of where this output might

be used include:

1

Y1

Y2

SINGLE

HP

MULTI

HC

1ST STAGE COMP.

2ND STAGE COMP.

RC

G

Y1

Y2

B

Figure 6

2

3

4

ELECT

O

GAS

B

FAN

RELAY

G

C

R

MODEL 8570 THERMOSTAT

(shown with enclosure face removed)

O

C

SINGLE/MULTI – SET TO

MULTI FOR TWO STAGE

HEAT PUMP

USE ONLY TO

CONTROL 24-VOLT

LOADS

24

VAC

I+

I-

AHC

CONNECTION

ELECT/GAS - SET TO

ELECT FOR ELECTRIC

AUXILIARY HEAT, SET TO

GAS FOR FOSSIL FUEL

(DUAL FUEL) AUXILIARY

HEAT

C

R

NC

COM

NO

ZA

120

VAC

RC

RH

W1

ZB

ZA

6504

CONNECTION

ZB

W1

Y1

OUTDOOR (ODT)

& INDOOR (IDS)

I+

DEFROST

W2

G

GND

O/B – SET TO “O” IF HEAT

PUMP REVERSING VALVE

MUST BE ENERGIZED

WHEN COOLING, SET TO

“B” IF IT IS TO BE

I-

ODT TEMPERATURE

IDS

1ST STAGE

COMP.

IDS

ODT

GND

O/B

Y1

Y2

• Turn on outdoor ventilation for

programming periods of the day

when the building is occupied and

turn it off when unoccupied.

SENSORS

LOAD

EVENT

TRIGGERED

OUTPUT

(ETO)

2ND STAGE

COMP.

COM

NO

NC

Y2

O

ENERGIZED IN HEATING

2A MAX OPERATING CURRENT

3A MAX IN-RUSH CURRENT

REV.

VALVE

• Have an electronic air cleaner turn

on and off only when the building is

occupied to reduce maintenance

time/cost.

L

SERVICE

R

C

Diagram 8: Two-Stage Heat Pump

OUTDOOR UNIT - HEAT PUMP

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To ENABLE and program the relay:

To DISABLE the relay:

(7) OPTIONAL – INSTALL AN APRILAIRE MODEL 8052 OUTDOOR TEMPERATURE SENSOR

1. Make sure the thermostat is in the OFF mode.

2. Press and hold the

display will show the ADV. SETTINGS MENU.

and

buttons for 3 seconds. The

2. Press and hold the

display will show the ADV. SETTINGS MENU.

and

buttons for 3 seconds. The

Note: If an ADHC is to be installed, do not wire

Figure 7

an outdoor temperature sensor– see Step 8.

The ADHC uses its own outdoor temperature

sensor, which can be read by the thermostat.

3. Scroll down through the menu items and select

PROGRAMMABLE OUTPUT.

3. Scroll down through the menu items and select

PROGRAMMABLE OUTPUT.

4. Select ENABLE. The display will then show the program

event names, and whether the output is to be ON or OFF

during that event.

4. Select DISABLE. The display will then return to the ADV.

SETTINGS MENU.

1. Mount the outdoor temperature sensor

(see Figure 7).

NORTH, EAST

OR WEST SIDE

• 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.

OF BUILDING

5. Use the multi-function buttons labeled and to toggle

between events and highlight the ON/OFF item to change.

Use the

and

buttons to change the highlighted item

to ON or OFF.

• Mount above anticipated snow line.

6. Repeatedly press until DONE is highlighted, where the

multi-function buttons are labeled CANCEL and SAVE. Press

SAVE to save the values set, or press CANCEL to return to

the PROGRAMMABLE OUTPUT menu.

SENSOR WITH

BRACKET

• Mount at least 3 feet away from exhaust

vents and condensing units.

• Maximum wire length from sensor to

thermostat is 300 feet.

ABOVE SNOW LINE

• Under a soffit or under a wall overhang

are recommended areas for mounting

the sensor.

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2. Run a 2-wire cable from the sensor to the thermostat.

OUTDOOR TEMPERATURE (°F)

RESISTANCE (kΩ)

Figure 8

-30

-20

-10

0

230.6

163.8

117.6

85.4

62.6

46.3

34.6

26.1

19.9

15.3

11.9

9.4

CAUTION

voltage (120 VAC) or higher lines as this can cause

erratic readings.

Do not run the wire along side line

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.

10

20

30

40

50

60

70

80

90

100

• Use an ohmmeter to measure the resistance (kΩ) of

the sensor. The resistance reading will depend on the

outdoor temperature (see table).

4. Wire the sensor to the thermostat (see Figure 8).

• Strip 1/4" of insulation from the two sensor wires.

• Connect the sensor wires to the ODT and CIR GND

terminals of the thermostat. The wiring is not polarity

sensitive, so either wire can be connected to either

thermostat terminal.

7.4

5.9

90-1025

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Figure 9

(8) OPTIONAL – INSTALL AN AUTOMATIC DIGITAL HUMIDIFIER CONTROL (ADHC)

Automatic Digital Humidifier Control

Note: The ADHC uses its own outdoor temperature sensor,

which is read by the thermostat. If an ADHC is to be installed,

do not wire an outdoor temperature sensor to the ODT

terminal of the thermostat.

2. Run a 2-wire cable from the ADHC to the thermostat.

3. Wire the ADHC to the thermostat (see Figure 9).

• Strip 1/4" of insulation from the ends of the wires.

R

C

A

B

ODT W/G Cf

H

• Connect the A terminal of the ADHC to the ZA terminal

of the thermostat.

1. Mount the ADHC and its outdoor temperature sensor.

• Follow the directions provided with the ADHC except do

not mount the ADHC temperature sensor in a fresh air

intake. The temperature sensor must be mounted

outside to provide a precise temperature reading.

• Connect the B terminal of the ADHC to the ZB terminal

of the thermostat.

4. You will need to power up the thermostat to verify the

connection. Refer to step 7 of THERMOSTAT START UP

on page 28.

Transformer

To Humidifier

• Maximum wire length from ADHC to thermostat is 300 feet.

• The ADHC must have constant power. DO NOT power

the ADHC through furnace accessory terminals.

DO NOT use a Model 50 Current Sensing Relay.

Outdoor

Temperature

Sensor

5. After completing the thermostat installation, you will also

need to verify proper operation of the ADHC – see ADHC

installation instructions for details on how this is done.

• NOTE: Operating the ADHC in Manual Mode will result in

the outdoor temperature shown on the thermostat to

always be 20°F.

WARNING

injury from electrical shock. Do not power up humidifier

before completing the thermostat installation.

Improper installation may cause serious

Note: ADHC must be powered by

a continuous supply - do not wire

to furnace accessory terminals.

Model 8570 Thermostat

CAUTION

Do not run the wire along side line voltage

90-1029A

(120 VAC) or higher lines as this can cause erratic readings.

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Figure 10

(9) OPTIONAL – INSTALL AN APRILAIRE MODEL 8051 FLUSH MOUNT

OR 8053 SURFACE MOUNT TEMPERATURE SENSOR

1. Mount the indoor temperature sensor.

3. Take a resistance measurement before connecting to

the IDS and CIR GND terminals to verify the sensor is

properly installed.

• Locate the sensor as you would locate a thermostat.

• Maximum wire length from sensor to thermostat is

300 feet.

• Use an ohmmeter to measure the resistance (kΩ) of the

sensor. The resistance reading will depend on the indoor

temperature (see table from OUTDOOR SENSOR

installation section on page 20).

• Follow the installation instructions provided with

the sensor.

2. Run a 2-wire cable from the sensor to the thermostat.

4. Wire the sensor to the thermostat (see Figure 10).

• Strip 1/4" of insulation from the two sensor wires.

CAUTION

side line voltage (120 VAC) or higher lines as

this can cause erratic readings.

Do not run the wire along

• Connect the sensor wires to the IDS and CIR GND

terminals of the thermostat. The wiring is not polarity

sensitive, so either wire can be connected to either

thermostat terminal.

90-1026

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4. THERMOSTAT SET UP – SET NUMBER OF AUXILIARY

HEAT STAGES

NOTE: Refer to the Owner’s Manual for

thermostat operating instructions.

(10) THERMOSTAT STARTUP – STAND ALONE APPLICATIONS

Only for single stage heat pump systems. In the Heat

mode, control up to three stages of heat.

1. PLACE THE THERMOSTAT ON THE BASE.

2. TURN ON POWER TO THE HVAC SYSTEM.

1. Make sure the thermostat is in the OFF mode.

2. Press and hold the

and

buttons for 3 seconds.

3. THERMOSTAT SET UP – HEAT ONLY OR COOL ONLY

APPLICATIONS

The display will show the ADV. SETTINGS MENU.

MESSAGE

CENTER

EQUIPMENT

STATUS

3. Scroll down through the menu items and select

AUXILIARY HEAT SETUP.

Skip this step if the thermostat is to control both

heating and cooling.

4. Use the

and

buttons to highlight either

OUTDOOR

TEMPERATURE

1. Make sure the thermostat is in the OFF mode.

ONE STAGE AUX HEAT or TWO STAGE AUX HEAT.

2. Press and hold the

and

buttons for 3 seconds.

SETPOINTS

5. Press BACK to return to the ADV. SETTINGS MENU,

then EXIT to return to the Operating Display.

The display will show the ADV. SETTINGS MENU.

3. Scroll down through the menu items and select

CONTROL SET UP.

ROOM

TEMPERATURE

5. VERIFY OUTDOOR TEMPERATURE SENSOR CONNECTION

(if optional outdoor temperature sensor installed).

4. Use the

and

buttons to highlight either

• If an outdoor temperature sensor has been installed and

is operational, an outdoor temperature will appear on

main display.

HEAT ONLY or COOL ONLY.

5. Press BACK to return to the ADV. SETTINGS MENU,

then EXIT to return to the Operating Display.

UP/DOWN BUTTONS

MULTI-FUNCTION

BUTTONS

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6. CHECK FAN OPERATION

7. VERIFY ADHC CONNECTION (if optional Automatic Digital

Humidifier Control installed).

TROUBLESHOOTING – ADHC CONNECTION

Symptom

1. Turn on the fan (set to ON).

Cause

1. Ensure that the ADHC has power (the green status light

on the ADHC should be on) and make sure the ADHC is

functioning properly – see ADHC installation procedure

for start up and diagnostics.

• The thermostat G terminal will energize and the

system blower will start. The Fan Status on the display

will show “FAN ON.”

Miswiring – Check wire colors to verify A at ADHC is connected to ZA at

thermostat and B is connected to ZB.

2. If an ADHC has been installed, allow the fan to

operate for no less than 40 seconds. If an ADHC 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.

No RH display, no outdoor

temperature display

ADHC power source – When wired to the Model 8570 thermostat, the ADHC

must be wired to a continuously ON power source. Use voltmeter to verify

presence of 24VAC (nominal) at ADHC.

2. From the Main Screen, press the “INFO” button.

• The outdoor temperature and relative humidity will be

displayed for five seconds after which the contact

screen will be displayed.

ADHC not operating correctly – check red diagnostic light on ADHC.

No valid reading available – run fan for at least 40 seconds.

3. Press the BACK button to return to the Main Screen.

No RH display, outdoor temperature OK

RH display, outdoor temperature @ 20°F

3. Turn the fan off (set to AUTO).

• When the humidifier is operating, the message

“HUMIDIFIER ON” appears at the message center,

alternating with the time and date and any other

currently active messages.

ADHC set for manual mode of operation. Wire an outdoor sensor to the

ADHC or wire an outdoor sensor to the thermostat.

No display, weak text in display,

or too dark of a display

Readjust contrast of display to an optimum level. See “Adjust Contrast”

Section 7.8 in the Owner’s Manual.

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8. CHECK HEATING OPERATION

2. Set the thermostat to the HEAT mode.

TROUBLESHOOTING – HEATING OPERATION

Symptom

Notes:

• With the O/B configuration setting in the B position (ON), the

O/B terminal will be on in the Heat mode. In the O position

(OFF), the O/B terminal will not be on in the Heat mode.

Cause

• To avoid the minimum on and off times during system

checkout, always start and end the check out

procedure in the OFF mode.

Minimum-off times. Change the mode to OFF first, then change the mode to

HEAT and make a call for heat.

Thermostat does not call for heat

Heating does not come on at all

3. Raise the temperature setting above the room temperature to

activate the desired stages of heating. The mode display will

change from “HEAT MODE” to “HEATING”, which will flash,

when the thermostat is calling for heat. Fifteen (15) seconds

must elapse between each stage. Verify the correct outputs

are on according to the configuration settings shown below:

RH terminal not connected – see wiring diagrams.

Heating equipment power not on.

• Do not operate heat pumps in the heating mode at high

outdoor temperatures for extended periods of time.

High Balance point limit – set balance point to OFF during system checkout.

1. Set the thermostat to the OFF mode.

Auxiliary Heat does not come on

Fan stays on after heat call

Number of Auxiliary Heat stages not set correctly. See Step 4 of Thermostat

Start Up (page 27).

Single/Multi

HP/HC

Elect/Gas

Multi Multi Single Single Multi Multi

Single

HP

Single

HP

Gas

Furnace plenum sensor keeps fan on – normal.

HC

Elect

HC

Gas

HC

Elect

HC

HP

Configuration

Settings

Blower Extension for humidifier operation. Verify that the message

"HUMIDIFYING" appears at the message center, alternating with the time

and date and any other currently active messages.

Gas

Elect

Gas

Elect

Aux. Ht. Stages

1

2

1

2

W1

G

W1

W2

G

W1

G

W1

W2

G

W1

Y1

G

Y1

Y2

G

Y1

Y2

W1

G

Y1

G

Y1

Y2

G

Y1

G

Y1

W1

G

Y1

G

Y1

W1

G

Y1

W1

W2

G

Y1

G

W1

Y1

G

W1

Change position of ELECT/GAS dip switch – ELECT for electric heat systems

(fan on with heat call) or to GAS for fossil fuel systems where the fan is

controlled internally by the heating equipment.

1st Stage Heat

Fan comes on before heat starts, or

Fan does not come on with heat

W1

W2

W1

W2

2nd Stage Heat

Outputs

Energized

O/B dip switch not set properly. See Step 2, page 30.

Cooling comes on instead of heat

W1

W2

Miswiring – check wire colors at thermostat and HVAC equipment.

3rd Stage Heat

Takes longer than 15 seconds for auxiliary

heat to come on after compressor heat.

SINGLE/MULTI dip switch set incorrectly – set to SINGLE for single-stage

compressor systems.

W1

G

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9. CHECK COOLING OPERATION

2. Set the thermostat to the COOL mode.

TROUBLESHOOTING – COOLING OPERATION

Symptom

Notes:

• With the O/B configuration setting in the O position (OFF),

the O/B terminal will be on in the Cool mode. In the

B position (ON), the O/B terminal will not be on in the

Cool mode.

Cause

• To avoid the minimum on and off times during system

checkout, always start and end the check out

procedure in the OFF mode.

Minimum-off times. Change the mode to OFF first, then change the mode

to COOL and make a call for cooling.

Thermostat does not call for cooling

Cooling does not come on at all

3. Lower the temperature setting below the room temperature to

activate the desired stages of cooling. The mode display will

change from “COOL MODE” to “COOLING”, which will flash,

when the thermostat is calling for cooling. Fifteen (15) seconds

must elapse between each stage. Verify the correct outputs

are on according to the configuration settings shown below:

RC terminal not connected – see wiring diagrams.

Cooling equipment power not on.

• Do not operate air conditioning at low outdoor

temperatures. Refer to equipment manufacturer

recommendations for safe operating temperatures.

O/B dip switch not set properly. See Step 2, page 32.

Miswiring – check wire colors at thermostat and HVAC equipment.

Heat comes on instead of cooling

1. Set the thermostat to the OFF mode.

Single/Multi

Single

Multi

HP/HC

Configuration Settings

The same outputs come on

regardless of how these are set.

Elect/Gas

Aux. Ht. Stages

1st Stage Cool

Outputs Energized

Y1, G

Y1, Y2, G

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2nd Stage Cool

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10. CHECK EMERGENCY HEAT OPERATION (Heat Pumps Only)

2. Set the thermostat to the EMERGENCY HEAT mode.

TROUBLESHOOTING – EMERGENCY HEAT OPERATION

Notes:

• With the O/B configuration setting in the B position (ON),

the O/B terminal will be on in the Emergency Heat mode. In

the O position (OFF), the O/B terminal will not be on in the

Emergency Heat mode.

Symptom

Cause

• To avoid the minimum on and off times during system

checkout, always start and end the check out

procedure in the OFF mode.

Minimum-off times. Change the mode to OFF first, then change the mode

to EMERGENCY HEAT and make a call for heat.

Thermostat does not call for heat

3. Raise the temperature setting above the room temperature to

activate Emergency Heat. The mode display will change from

“EHEAT MODE” to “HEATING”, which will flash, when the

thermostat is calling for heat. Fifteen (15) seconds must

elapse between each stage. Verify the correct outputs are on

according to the configuration settings shown below:

RH terminal not connected – see wiring diagrams.

Heating equipment power not on.

1. Set the thermostat to the OFF mode.

Emergency Heat does not come on at all

Change position of ELECT/GAS dip switch – ELECT for electric heat systems

(fan on with heat call) or to GAS for fossil fuel systems where the fan is

controlled internally by the heating equipment.

Fan comes on before heat starts, or

Fan does not come on with heat

Single/Multi

The same outputs come on

regardless of how these are set.

HP/HC

Configuration Settings

Elect/Gas

Elect

Gas

Aux. Ht. Stages

The same outputs come on regardless of how these are set.

1st Stage Emer. Heat

Outputs Energized

W1, G

W1

2nd Stage Emer. Heat

W1, W2, G

W1, W2

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2. DIFFERENTIALS

3. Use the ▲ or ▼ button to highlight “SET DIFFERENTIAL”

and press the SELECT button.

(11) CUSTOMIZE THE APPLICATION SETTINGS

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°.

The default setting for the first stage and second stage

differential is 1°.

– If the thermostat SINGLE/MULTI dip switch is set for

MULTI, two differentials will appear, if set for SINGLE,

only one will appear.

1. PROGRAMMABLE OR NON-PROGRAMMABLE

0-Non Programmable This setting is best when having the

temperature setting change with the

time of day is not desired. The Program

option in the menu is not available when

this setting is selected. To change the

temperature, simply use the Up and

Down arrow buttons.

This thermostat can be configured as a programmable or

non-programmable thermostat. Four choices are available:

4. To cancel, press the BACK button. This will return you

to the ADV. SETTINGS MENU.

4-Residential This setting is best for homeowners where there

are regularly scheduled, long periods of time

during any day where the house is not occupied,

such as when everyone is at school or work. In

the program, there will be four scheduled

5. To change the first stage differential, press the ▲ and ▼

button to raise or lower the setting. To change the second

stage differential, press the SELECT button.

To change the differential settings:

1. Make sure the thermostat is in the OFF mode.

6. To finish and return to the ADV. SETTINGS MENU, press

the SELECT button after the value(s) have been set.

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. SETTINGS MENU.

temperature changes per day (events) labeled

Wake, Leave, Return and Sleep.

2. Press MENU button to show the MAIN MENU.

3. Scroll down through the menu items and select SETTINGS.

– For heat pumps – the auxiliary heat differential(s) are

set separately after the number of auxiliary heat stages is

selected. See Diagrams 6-8 on pages 14-16 for auxiliary

heat set up instructions.

2-Residential This setting is best for homeowners who have

no long periods of time during the day when the

home is unoccupied. In the program, there will

be only two scheduled temperature changes per

day (events) labeled Day and Night.

4. In the SETTINGS MENU, scroll down through the menu items

and select EVENTS PER DAY.

5. To cancel, press the BACK button. This will return you to the

SETTINGS MENU.

6. To change, use the ▲ or ▼ button to scroll to the

desired setting.

2-Business

This setting is best for businesses that are

occupied during business hours and not occupied

during non-business hours. In the program, there

will be only two scheduled temperature changes

per day (events) labeled Occupied and Unoccupied.

7. To finish and return to the SETTINGS MENU, press the

SELECT button.

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3. OFFSET

4. DEADBAND

5. PROGRESSIVE RECOVERY

To turn Progressive Recovery on or off:

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.

This is the number of degrees (in either °F or °C) that the heat

setting must be lower than the cool setting. The thermostat will

automatically adjust the temperature setting not being changed

to maintain this difference.

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 temperature to the programmed

value until the start of the event.

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. SETTINGS MENU.

3. Use the ▲ or ▼ button to highlight “PROGRESSIVE

RECOVERY” and press the SELECT button.

1. Make sure the thermostat is in the OFF mode.

2. Press and hold both the ▲ and ▼ button for 3 seconds.

– The display will show the ADV. SETTINGS MENU.

3. Scroll down through the menu items and select SETTINGS.

4. To cancel, press the BACK button

To change the offset:

5. To change whether Progressive Recovery is on or off,

press the ▲ or ▼ button to highlight either ON or OFF.

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. SETTINGS MENU.

4. Use the ▲ or ▼ button to highlight “DEADBAND” and press

the SELECT button.

6. To finish and return to the ADV. SETTINGS MENU, press

the SELECT button.

3. Use the ▲ or ▼ button to highlight “SET OFFSET” and

press the SELECT button.

5. To cancel, press the BACK button. This will return you to the

SETTINGS MENU.

4. To cancel, press the BACK button.

6. To change, use the ▲ or ▼ button to scroll to either 2°

5. To change the offset value, press the ▲ or ▼ button to

or 5°.

raise or lower the setting between –4° and +4° (°F or °C).

7. To finish and return to the ADV. SETTINGS MENU, press the

6. To finish and return to the ADV. SETTINGS MENU, press

SELECT button.

the SELECT button.

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6. BALANCE POINTS (HEAT PUMPS ONLY)

3. Use the ▲ or ▼ button to highlight “SET BALANCE

7. INPUT DEALER CONTACT INFORMATION

3. Use the ▲ or ▼ button to highlight “INPUT DEALER INFO”

POINTS” and press the SELECT button.

and press the SELECT button. This enters Line 1.

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 ADHC or from an outdoor

temperature sensor.

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 information. At installation,

the contact information is blank and only the thermostat

model number appears. You have the option of inputting this

contact information with the name and number of your

company. Three twenty (20) character lines are available for

your company name and contact info.

4. To cancel, press the BACK button. This returns to the

ADV. SETTINGS MENU. You must be at the first position

when pressing the BACK button to return to the

ADV. SETTINGS MENU.

4. To cancel, press the BACK button. This will return you to

the ADV. SETTINGS MENU.

5. To change the low balance point, press the ▲ or ▼

button to raise or lower the temperature value

(range is -10°F to 35°F and OFF).

5. To go back a character, press the BACK button.

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. The high

balance point is the outdoor temperature at or above which the

thermostat will lockout the auxiliary heat – only compressor

heat will be used to satisfy heating demands. Emergency heat

operation is unaffected by the high balance point.

6. To enter a character, use the ▲ or ▼ buttons to scroll

through the available characters. Press the SELECT button

to enter the character.

6. To change the high balance point, press the SELECT

button, then press the ▲ or ▼ button to raise or lower the

temperature value (range is 40°F to 80°F and OFF).

7. To finish Line 1 and go to Line 2, repeatedly press

SELECT, filling all remaining characters with spaces,

then press SELECT again.

7. To finish and return to the ADV. SETTINGS MENU, press

the SELECT button after the value(s) have been set.

To change the contact information:

Important time saver: If the thermostat is installed as part

of a Model 6504 Intelligent Zoned Comfort System, the

balance points only need to be changed at one thermostat.

The Model 6504 will share the new settings with all

connected thermostats.

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. SETTINGS MENU.

8. Repeat to fill Line 2 and Line 3.

To change the balance points:

9. To finish, press the SELECT button after entering the

20th character of the third line.

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. SETTINGS MENU.

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8. BLOWER EXTENSION FOR HUMIDITY CONTROL

To enable blower extension:

9. MONITORS – AIR FILTER, SERVICE HUMIDIFIER,

UV LAMP, SERVICE HVAC

4. Use ▲ or ▼ button to highlight the monitor you wish to

set (AIR FILTER, SERVICE HUMIDIFIER, UV LAMP or

SERVICE HVAC) then press the SELECT button. Press the

BACK button to cancel.

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. The thermostat will operate

the blower for no less than 5 minutes after the heat call and

not more than 15 minutes. This will allow the humidifier to

continue to put moisture in the air to satisfy the humidity

demand. This feature can be enabled or disabled and can only

be used when an ADHC is part of the installation.

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. SETTINGS MENU.

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. All monitors can also be turned off for installations

where one or more of the components may not be installed.

When the thermostat has verified that a monitor setting has

been reached, a message is displayed on the thermostat

(at the message center location where date and time are

normally displayed) and the label for the multi-function button

normally labeled INFO changes to CALL DEALER.

5. Use ▲ or ▼ button to highlight the amount of time you

wish to set then press the SELECT button. Press the BACK

button to cancel.

3. Use the ▲ or ▼ button to highlight “BLOWER EXTENSION”

and press the SELECT button.

4. To cancel, press the BACK button

6. Pressing the SELECT button, after setting the schedule,

takes you back to the MONITORS screen.

5. To change whether Blower Extension is enabled (on) or

disabled (off), press the ▲ or ▼ button to highlight either

ON or OFF.

• To set additional reminder schedules return to step 3.

• To finish, press the BACK button three times to return to

normal operation.

6. To finish and return to the ADV. SETTINGS MENU, press

the SELECT button.

To reset an active monitor:

Note: To take full advantage of this feature, the humidifier

must be plumbed to hot water.

1. Press the CALL DEALER button.

2. Press the RESET button.

To set humidifier, filter, UV and HVAC service

reminder schedules:

3. This will reset the monitor and return you to the Main Screen.

Important: When an ADHC is installed with the thermostat,

either directly or as part of a Model 6504 Intelligent Zoned

Comfort System, the service humidifier monitor will

1. Press the MENU button.

2. Use ▲ or ▼ button to highlight SETTINGS, then press the

automatically be set to AUTO. AUTO is not a choice unless an

ADHC is present. Set to AUTO, the ADHC will initiate “service

humidifier” based on humidifier type and run time.

SELECT button. Press the BACK button to cancel.

3. Use ▲ or ▼ button to highlight MONITORS, then press

SELECT. Press BACK to cancel.

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RESEARCH PRODUCTS CORPORATION

10006198 11.07

B2203358D

997-040090-3

Printed in U.S.A.

P.O. BOX 1467 • MADISON,WI 53701-1467

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