Aprilaire Model 8570 Thermostat User Manual

TABLE OF CONTENTS

PAGE

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

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

WIRE REQUIREMENTS. . . . . . . . . . . . . . . . . . . . . . . . 2

. SELECT A MOUNTING LOCATION. . . . . . . . . . . 3

. OPEN THE THERMOSTAT . . . . . . . . . . . . . . . . . 4

. MOUNT THE THERMOSTAT BASE

TO THE WALL . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Diagram 5 – Radiant Floor 1st Stage Heat

with Furnace 2nd Stage Heat and AC . . . . . . . . . 13

. SET THE CONFIGURATION DIP SWITCHES

ON THE THERMOSTAT CIRCUIT BOARD . . . . . 6

Diagram 6 – Single-Stage Heat Pump . . . . . . . . 14

Diagram 7 – Two-Stage Heat Pump . . . . . . . . . . 15

6. OPTIONAL – INSTALL AN OUTDOOR

TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . 16

PAGE

. OPTIONAL – INSTALL AN AUTOMATIC

HUMIDIFIER CONTROL (AHC) . . . . . . . . . . . . . 19

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

. OPTIONAL – INSTALL AN INDOOR

TEMPERATURE SENSOR . . . . . . . . . . . . . . . . . 21

. 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

Monitors – Air Filter, Service Humidifier,

UV Lamp, Service HVAC . . . . . . . . . . . . . . . . . . 35

(Heat Pumps Only) . . . . . . . . . . . . . . . . . . . . . . . 29

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

. 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.

. 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.

. 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.

MODEL 8570 SPECIFICATIONS

Electrical

Thermostat Voltage:

24-volts ± 20% AC or DC

Total Load Current:

Single Output Load Current:

Solid State Output Residual Current:

Voltage Drop at Solid State Outputs:

Less than 5 mA

Less than 1-volt

Thermal

Operating Range:

Display Accuracy:

32°F – 99°F (0 C – 37 C)

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

±1°F

Control Accuracy:

Control Range Heat:

Control Range Cool:

Heat/Cool Deadband:

40°F – 88°F (4 C – 30 C)

42°F – 90°F (6 C – 32 C)

2°F or C

st Stage Differential:

Adjustable 1°F – 3°F (1°F default)

Adjustable 1°F – 4°F

2nd Stage Differential:

Temperature Offset:

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.

Application

# Wires

Diagram (Page)

1 (9)

Figure 1 – Thermostat Wire

Single-Stage Furnace/AC

Two-Stage Furnace/AC

Two-Stage Roof Top Unit

Boiler w/AC (2-transformer)

OPTIONAL –

AUTOMATIC

HUMIDIFIER

CONTROL

2 (10)

HVAC

EQUIPMENT

3 (11)

(

AHC)

4 (12)

SEE

OPTIONAL –

INDOOR

Radiant 1st Stage Heat,

Furnace 2nd Stage and AC

5 (13)

OPTIONAL –

OUTDOOR

2-WIRES

TABLE

TEMPERATURE

SENSOR

TEMPERATURE

SENSOR

Single-Stage Heat Pump

Two-Stage Heat Pump

6 (14)

7 (15)

-WIRES

MODEL 8570

THERMOSTAT

Figure 2 – Model 6504 Wire

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

MODEL 8570

4-WIRES

MODEL 6504

THERMOSTAT

18-24 gauge thermostat cable.

2 -

(1) SELECT A MOUNTING LOCATION

If installing the thermostat alone…

If installing an indoor temperature sensor…

•

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.

• 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).

•

Thermostat can be mounted to a vertical junction box (j-box).

DO NOT mount the thermostat:

•

Mount the sensor in the same location as if installing a

thermostat alone.

–

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.

3 -

(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.

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.

INSERT SCREWDRIVER INTO 1 OF

SLOTS (2 ARE ON THE TOPSIDE,

ARE ON THE BOTTOM SIDE)

4 -

(3) MOUNT THE THERMOSTAT BASE TO THE WALL

. 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

. 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.

. For junction box mounting, screws are field supplied.

The thermostat can be installed on a vertical j-box.

IDS

ODT

CIR

GND

. Seal the wire entry hole(s) with caulk, drywall putty

or insulation to prevent drafts from inside the wall

cavity from affecting thermostat performance.

CAUTION

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

5 -

(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

Figure 5

thermostat for operation

with the equipment it is to

control. Figure 5 shows

the default position for the

four switches.

504

AHC

GAS

MULTI

H/C

ELEC

SINGLE

6 -

6504 or AHC – This switch is used to configure the thermostat

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

installation as part of a Model 6504 Intelligent Zone System.

outputs (Y2 and W2) do not energize.

•

Set to 6504 only if installing as part of a Model 6504

Intelligent Zone System.

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

single-stage compressor heat pump systems.

Set to AHC if the thermostat is to be wired to the

HVAC equipment or standard zone system.

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

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

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

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

be energized on a call for heat.

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

•

Set to ELEC when the heat source is electric

such as strip heat).

• 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 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.

STOP! 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 -

(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.

. Run a cable with the correct number of wires

Application

# Wires

Diagram (Page)

1 (9)

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

Single-Stage Furnace/AC

Two-Stage Furnace/AC

Two-Stage Roof Top Unit

Boiler w/AC (2-transformer)

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

be connected to the thermostat.

2 (10)

3 (11)

. Strip no more insulation than is required to make a

sound electrical connection at the HVAC equipment.

4 (12)

. Wire the thermostat to the HVAC equipment according

to the wiring schematic appropriate for your HVAC

equipment.

Radiant 1st Stage Heat,

Furnace 2nd Stage and AC

5 (13)

Single-Stage Heat Pump

Two-Stage Heat Pump

6 (14)

7 (15)

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 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.

Figure 6

. Mount the outdoor temperature sensor

NORTH, EAST

OR WEST SIDE

OF BUILDING

(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.

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.

Follow any additional location requirements

found on sensor installation instructions.

16 -

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

OUTDOOR TEMPERATURE (°F)

RESISTANCE (kΩ)

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

. 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).

. Wire the sensor to the thermostat (see Figure 7).

•

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

100

5.9

17 -

Figure 7

IDS

ODT

CIR

GND

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.

3. Wire the AHC to the thermostat (see Figure 8).

•

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

Connect the I- terminal of the AHC to the I- terminal of

the thermostat.

1. Mount the AHC and its outdoor temperature sensor.

•

Connect the I+ terminal of the AHC to the I+ terminal of

the thermostat.

•

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.

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

connection. Refer to step 5 of THERMOSTAT START UP

on page 24.

•

Maximum wire length from AHC to thermostat is 300 feet.

The AHC must have constant power. DO NOT power the

. After completing the thermostat installation, you will also

need to verify proper operation of the AHC – see AHC

installation instructions for details on how this is done.

AHC through furnace accessory terminals.

•

DO NOT operate the AHC in Manual Mode – this will result

in the outdoor temperature shown on the thermostat to

always be 20°F.

WARNING

Improper installation may cause serious

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

injury from electrical shock. Do not power up humidifier

before completing the thermostat installation.

CAUTION

Do not run the wire along side line voltage

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

19 -

Figure 8

OFF

AUTOMATIC MODE

I+ I-

₄_VC

ODT

B2203201 Rev. B

AHC must be powered by a

continuous supply – do not wire

to furnace accessory terminals.

20 -

(8) OPTIONAL – INSTALL AN APRILAIRE MODEL 8051 INDOOR FLUSH MOUNT TEMPERATURE SENSOR

. 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

•

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 17).

300 feet.

•

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 9).

•

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.

21 -

Figure 9

IDS

ODT

CIR

GND

22 -

(9) THERMOSTAT STARTUP – STAND ALONE APPLICATIONS

MESSAGE

CENTER

EQUIPMENT

STATUS

OUTDOOR

TEMPERATURE

SETPOINTS

ROOM

TEMPERATURE

MULTI-FUNCTION

BUTTONS

UP/DOWN 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.

. PLACE THE THERMOSTAT ON THE BASE.

. TURN ON POWER TO THE HVAC SYSTEM.

•

The display will show the Aprilaire screen for approximately

seconds (up to 10 seconds if installed as part of a

Model 6504 Intelligent Zone System).

• Turn the fan off (set to AUTO).

5. VERIFY AHC CONNECTION (if optional Automatic

Humidifier Control installed).

•

After this initial screen the thermostat will enter

operational mode.

•

Ensure that the AHC has power (the green status light on

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

functioning properly – see AHC installation procedure for

start up and diagnostics.

3. VERIFY OUTDOOR TEMPERATURE SENSOR CONNECTION

(if optional outdoor temperature sensor installed).

•

If an outdoor temperature sensor has been installed

and is operational, an outdoor temperature will appear

on main display.

• 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 (see page 33 for additional information

on the contact screen).

4. CHECK FAN OPERATION

•

Turn on the fan (set to ON).

•

When the humidifier is operating, the message

The thermostat G terminal will energize and the system

blower will start. The Fan Status on the display will show

“HUMIDIFIER ON” appears at the message center,

alternating with the time and date and any other currently

active messages.

“FAN ON.”

24 -

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.

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

No RH display, outdoor temperature OK

RH display, outdoor temperature @ 20°F

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

or wire an outdoor sensor to the thermostat.

25 -

6. CHECK HEATING OPERATION

• Wait for 2nd Stage:

Notes:

– Furnace, Boiler: Minimum-on time for 1st stage

is 2 minutes.

. 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.

•

Set the thermostat to the OFF mode.

Set the thermostat to the HEAT mode:

• Y1, W1 and G terminals will energize if

SINGLE/MULTI dip switch set to SINGLE and

ELEC/GAS dip switch set to ELEC.

–

The B terminal will energize when in the Heat mode.

•

Y1, Y2 and G terminals will energize if SINGLE/MULTI

dip switch set to MULTI.

•

Raise the heat setting to 5° higher than the room

temperature to initiate a 1st stage heat call. The mode

display will change from "HEAT MODE" to "HEATING",

which will flash when the thermostat is calling for heat:

•

W1 will energize if SINGLE/MULTI set to SINGLE and

ELEC/GAS set to GAS.

•

Wait 4 minutes for 3rd Stage (multi-stage compressor heat

pump systems only):

–

Furnace, Boiler: W1 (and G if GAS/ELEC dip switch is set

in the ELEC position) terminals will energize.

–

Y1, Y2, W1 and G terminals will energize if

–

Heat pumps: Y1 and G terminals will energize.

SINGLE/MULTI set to MULTI and ELEC/GAS set to ELEC.

–

W1 will energize if SINGLE/MULTI set to MULTI and

ELEC/GAS set to GAS.

Set the thermostat to the OFF mode.

26 -

TROUBLESHOOTING – HEATING OPERATION

Symptom

Cause

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

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.

Furnace plenum sensor keeps fan on – normal.

Blower Extension for humidifier operation. Verify that the message

Fan stays on after heat call

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

and date and any other currently active messages.

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

Fan comes on before heat starts, or

Fan does not come on with heat

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

controlled internally by the heating equipment.

Reversing valve wiring.

Cooling comes on instead of heat

Miswiring – check wire colors at thermostat and HVAC equipment.

Takes longer than 4 minutes for auxiliary

heat to come on after compressor heat.

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

compressor systems.

27 -

7. CHECK COOLING OPERATION

• Set the thermostat to the COOL mode:

Notes:

– The O terminal will energize when in the Cool mode.

. To avoid the minimum off times during system

checkout, always start the check out procedure

in the OFF mode.

• Lower the cool setting to 5° below the room temperature

to initiate a 1st stage cool call. The mode display will

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

when the thermostat is calling for cooling:

. Do not operate air conditioning at low outdoor

temperatures. Refer to equipment manufacturer’s

recommendations for safe operating temperatures.

– Y1 and G terminals will energize.

•

Wait 4-minutes for 2nd Stage:

Y1, Y2 and G terminals will energize.

Set the thermostat to the OFF mode.

•

Set the thermostat to the OFF mode.

–

TROUBLESHOOTING – COOLING OPERATION

Symptom

Cause

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

RC terminal not connected – see wiring diagrams.

Cooling equipment power not on.

Reversing valve wiring.

Heat comes on instead of cooling

Miswiring – check wire colors at thermostat and HVAC equipment.

28 -

. CHECK EMERGENCY HEAT OPERATION

Heat Pumps Only)

Notes:

• 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:

(

1. To avoid the minimum off times during system checkout,

–

W1 (and G if GAS/ELEC dip switch is set in the ELEC

position) terminals will energize.

always start the check out procedure in the OFF mode.

•

Set the thermostat to the OFF mode:

•

Wait for 2nd Stage:

Set the thermostat to the EMERGENCY HEAT

–

Minimum-on time for 1st stage is 2 minutes.

(EMERG) mode:

W1, W2 (and G if GAS/ELEC dip switch set to the

ELEC position) will energize.

–

The B terminal will energize when in the

Emergency Heat mode.

Set the thermostat to the OFF mode.

TROUBLESHOOTING – EMERGENCY HEAT OPERATION

Symptom

Cause

Thermostat does not call for heat

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

to EMERGENCY HEAT and make a call for heat.

RH terminal not connected – see wiring diagrams.

Heating equipment power not on.

Emergency Heat does not come on at all

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

Fan comes on before heat starts, or

Fan does not come on with heat

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

controlled internally by the heating equipment.

29 -

(10) CUSTOMIZE THE APPLICATION SETTINGS

1. DIFFERENTIAL

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

and press the SELECT button.

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°.

However, once the second stage is turned on, it will stay on

until the temperature again reaches the 70° setting. 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.

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

to the ADV. SETTINGS MENU.

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

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

To change the differential settings:

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

–

For heat pumps – the auxiliary heat differential is the

same as the first stage differential in single-stage heat

pump applications and is the same as the second stage

differential for two-stage heat pump applications.

2. Press and hold both the ꢀ and ꢁ buttons for 3 seconds.

–

The display will show the ADV. SETTINGS MENU.

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. OFFSET

All thermostats are factory calibrated to be accurate to within

1° of true temperature. An offset is available to allow for

3. 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 temperature to the programmed

value until the start of the event.

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:

To turn Progressive Recovery 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.

–

The display will show the ADV. SETTINGS MENU.

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

press the SELECT button.

3. Use the ꢀ or ꢁ button to highlight “PROGRESSIVE

RECOVERY” and press the SELECT button.

4. To cancel, press the BACK button.

•

To cancel, press the BACK button

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

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

• To change whether Progressive Recovery is on or off,

press the ꢀ or ꢁ button to highlight either ON or OFF.

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

the SELECT button.

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

the SELECT button.

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4. BALANCE POINTS (HEAT PUMPS ONLY)

3. Use the ꢀ or ꢁ button to highlight “SET BALANCE

POINTS” and press the SELECT button.

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.

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

the ADV. SETTINGS MENU.

. To change the low balance point, press the ꢀ or ꢁ

button to raise or lower the temperature value

(range is 0°F to 40°F).

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 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).

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

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

Important time saver: If the thermostat is installed as part

of a Model 6504 Intelligent Zone System, the balance points

only need to be changed at one thermostat. The Model 6504

will share the new settings with all connected thermostats.

To change the balance points:

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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. INPUT DEALER CONTACT INFORMATION

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.

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. You

have the option of inputting this contact information with the

name and number of your company. Twenty (20) characters

are available for your company name. Space for a telephone

number, including area code, is available.

5. To delete a character, press the BACK button.

6. To enter a letter in the name of the company, use the

ꢀ or ꢁ buttons to scroll through the available characters.

Press the SELECT button to enter the character. For spaces,

press SELECT.

. To finish and go to the company number screen,

repeatedly press SELECT until all remaining characters have

been filled with spaces, then press SELECT again.

8. To delete a number, press the BACK button.

To change the contact information:

. To enter a number, use the ꢀ or ꢁ buttons to scroll

between the available characters. Press the SELECT button

to enter the character. The full 10-digit telephone number

must be entered.

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.

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

and press the SELECT button. This enters the company

name screen.

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

10th digit.

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6. BLOWER EXTENSION FOR HUMIDITY CONTROL

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

and press the SELECT button.

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 AHC is part of the installation.

4. To cancel, press the BACK button

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

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

ON or OFF.

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

the SELECT button.

Important: When the thermostat is installed as part of a

Model 6504 Intelligent Zone System, leave this feature

disabled. The Model 6504 performs this function.

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

should be plumbed to hot water.

To enable blower extension:

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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7. MONITORS – AIR FILTER, SERVICE HUMIDIFIER,

3. Use ꢀ or ꢁ button to highlight MONITORS, then press

UV LAMP, SERVICE HVAC

SELECT. Press BACK to cancel.

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.

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.

. Use ꢀ or ꢁ button to highlight the amount of time you

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

button to cancel.

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

takes you back to the MONITORS screen.

•

To set additional reminder schedules return to step 3.

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

normal operation.

Important: When an AHC is installed with the thermostat,

either directly or as part of a Model 6504 Intelligent Zone

System, the service humidifier monitor will automatically be

set to AUTO. AUTO is not a choice unless an AHC is present.

Set to AUTO, the AHC will initiate “service humidifier” based

on humidifier type and run time.

To set humidifier, filter, UV and HVAC service

reminder schedules:

1. Press the MENU button.

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

SELECT button. Press the BACK button to cancel.

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