Aprilaire Thermostat 8600 Users Manual

86001 bf63092e-e7e6-45eb-b0d1-fc8934404b57 Aprilaire Thermostat 8600 User Guide |

2015-02-03

: Aprilaire Aprilaire-Thermostat-8600-Users-Manual-467302 aprilaire-thermostat-8600-users-manual-467302 aprilaire pdf

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Model 8600 Universal
Touch Screen Thermostat

Safety &
Installation
Instructions
READ AND SAVE THESE INSTRUCTIONS

Table of contents
Installation
Installation location recommendations  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2
Outdoor temperature sensor (optional)  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 2
Remote temperature sensor (optional) . .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 3
Thermostat mounting .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 3
Power & reset options .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 3
Wiring terminal . .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 4
Wiring diagrams .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 4-5
Setup & Testing
Equipment type selection switch (SW1)  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 5
Installer setup menu .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 5
System test menu .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 8
References
Quick reference to controls & display  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
Troubleshooting . .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
Error codes  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
Thermostat features .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .
Specifications .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .

61000729A 8600 Tstat Install.indd 1

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Installation
Installation location recommendations
Thermostat should be mounted:

Do not mount thermostat:

• On an interior wall, in a frequently occupied space.

• Behind doors, in corners or other dead air spaces.

• Approximately 5‘ above floor.
• At least 18” from outside wall.

• In direct sunlight, near lighting fixtures, or other
appliances that give off heat.

• Thermostat can be mounted to a vertical junction box.

• On an outside or unconditioned area wall.
• In the flow of a supply register, in stairwells, or near
outside doors.
• On a wall with concealed pipes or ductwork.

Outdoor temperature sensor (optional)
Outdoor temperature can be measured by attaching an 8052 sensor to the S1 and S2 terminals. The outdoor sensor
must be enabled in the installer setup menu.
Heat pump models can use the outdoor
temperature to effectively utilize the heat pump:
• When the outdoor temperature is less than the Low
Balance Point, the heat pump will be locked out and
only auxiliary heating will be used.
• When the outdoor temperature is higher than the
High Balance Point, the auxiliary heating will be
locked out and only the heat pump will be used to
provide heating.

Outdoor temperature sensor should be mounted:
• On side of building out of direct sunlight (north side
recommended).
• Above snow line.
• At least 3’ away from exhaust vents and condensing
lines.
• Using less than 300’ of wire.
• Do not route wires along 120 VAC lines.

C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

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Installation
Remote temperature sensor (optional)
A remote temperature sensor can be used if the thermostat has to be mounted in a concealed location. A 8051 flush
mount or 8053 surface mount remote temperature sensor can be attached to the T1 and T2 terminals and mounted
in a recommended area. The remote sensor must be enabled in the installer setup menu. When the remote sensor is
installed it overrides the internal sensor.
Remote temperature sensor should be mounted:

Do not mount remote sensor:

• On an interior wall, in a frequently occupied space.

• Behind doors, in corners or other dead air spaces.

• Approximately 5‘ above floor.
• At least 18” from outside wall.

• In direct sunlight, near lighting fixtures, or other
appliances that give off heat.

• Using less than 300’ of wire.

• On an outside or unconditioned area wall.
• In the flow of a supply register, in stairwells, or near
outside doors.
• On a wall with concealed pipes or ductwork.
• Near 120 VAC lines.

C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

Thermostat mounting
1. Remove the rear mounting plate from the thermostat.
2. Pull wires through the opening on the back of the
thermostat.
3. Position and level the mounting plate of the thermostat
on wall and mark the hole locations with a pencil.
4. Drill 1/4” holes and insert supplied anchors
(drywall only).
5. Place mounting plate over anchors, insert and tighten
screws.
6. Seal wire entry holes to prevent drafts affecting
temperature readings.

Power & Reset options
The thermostat is dual power. It can either be AC or battery powered, or both (to provide backup power for the clock).
Batteries are optional if your thermostat was wired to run on AC power when installed.
For heat pump systems the C terminal must be connected to the common of the 24VAC transformer in order for the
system fault and emergency heat indicators to operate.
The thermostat has a memory backup that saves the thermostat settings in case of a power interruption. The system
settings will be retained but the clock will reset after 90 seconds with no battery or AC power.
The reset button located under the battery cover can be used to reset the thermostat to factory defaults. The system
settings will also be reset to default.
3

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Installation
Wiring terminal
C – Common (optional when powered by batteries)
B – Reversing valve1
C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

O – Reversing valve1
Y – 1st stage cooling / compressor
Y2 – 2nd stage cooling / compressor
G – Fan
RC – 24VAC supply cooling2
R – 24VAC supply heating2

Wire specifications:

W2 – 2nd stage heat / auxiliary

18-24 gauge thermostat wire

W – 1st stage heat / auxiliary
L – System fault indicator (optional) (heat pump only)

Installation notes:

S1 & S2 – outdoor temperature sensor (optional)

• Ensure power at the HVAC equipment is off.
• Loosen screw terminals, insert stripped wire and
re-tighten.
• Push the excess wire back into the opening and plug
the wall opening to prevent drafts.

T1 & T2 – remote temperature sensor (optional)
1

 and B terminals are both de-energized when system mode is
O
OFF or in AUTO when the heating and cooling equipment is idle.

2

J umper between RC & R is used in single transformer systems
(see wiring diagrams).

CONVENTIONAL HEAT/COOL

REMOTE TEMP
SENSOR

OUTDOOR TEMP
SENSOR

1st HEATING
NOT USED

2nd HEATING

COOLING
TRANSFORMER

FAN

1st COOLING
NOT USED

NOT USED

2nd COOLING

REMOTE TEMP
SENSOR

OUTDOOR TEMP
SENSOR

1st HEATING
NOT USED

2nd HEATING

JUMPER

FAN

2nd COOLING

1st COOLING
NOT USED

NOT USED

C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

HEATING
TRANSFORMER

Two transformers (Remove Jumper Wire)

TRANSFORMER

Single transformer (use Jumper wire)

C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

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Installation
HEAT PUMP
Two transformers (Remove Jumper Wire)

OR

REMOTE TEMP
SENSOR

OUTDOOR TEMP
SENSOR

FAULT DETECT

1st AUX HEATING

2nd AUX HEATING

HEAT PUMP
TRANSFORMER

FAN

1st COMPRESSOR

2nd COMPRESSOR

REVERSING VALVE

REMOTE TEMP
SENSOR

OUTDOOR TEMP
SENSOR

FAULT DETECT

1st AUX HEATING

2nd AUX HEATING

HEAT PUMP
TRANSFORMER

JUMPER

FAN

1st COMPRESSOR

2nd COMPRESSOR

REVERSING VALVE

HEATING
TRANSFORMER

Single transformer (use Jumper wire)

OR

C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

C B O Y Y2 G RC R W2 W L S2 S1 T1 T2

NOTE: “O” is active in cooling and “B” is active in heating.

Setup & Testing
EQUIPMENT TYPE SELECTION SWITCH (SW1)
This thermostat has the option of being used in heat
pump or heat/cool systems. Switch SW1 located on the
back of the thermostat’s face is used to select this option.
This setting can also be checked in the Installer System
Settings under Equipment Type.

SW1
HEAT/COOL
HEAT PUMP

HC
HP

Note: Thermostat reboots within 10 seconds after switch
position is changed.

HC
HP

Installer setup menu
How to enter the installer setup menu to change system settings:
Press [MODE] to set system to OFF.

Press [NEXT] or [BACK] to page through the settings.

Press [MENU] to enter main menu.

Press

Press and hold [SETUP] for seven seconds, [INSTALL
SETUP] appears.

Press [DONE] to save and exit, Or [CANCEL] to exit
without saving.

Press [INSTALL SETUP] to enter installer setup menu.

The thermostat will discard changes and exit if nothing
is pressed within 60 seconds.

SETTING
DESCRIPTION
SETTING
OPTIONS

SETTING
NUMBER

or

to adjust the setting.

To reset the installer settings to the default, reset the
thermostat by pressing the [RESET] key.

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Setup & Testing
INSTALLER SYSTEM SETTINGS TABLE
The following table is the list of the settings and their details. Default settings are shown in bold. Some settings are
only available to thermostats set to heat pump mode.

1

System setting

Description

Factory default setting (bold) and setting range

00. Equipment type

Equipment type is set by SW1

Heat/Cool
Heat Pump

01. Heat/Cool control
setup

Used to lockout heating or
cooling outputs (only available in
Heat/Cool mode)

Heat and Cool
Heat Only
Cool Only

02. Equipment stages

Number of stages of equipment

Single Stage
Multi Stage

03. Auxiliary heat
stages

Number of stages of auxiliary heat
equipment

1 Stage
2 Stages

04. Temperature scale

Set the thermostat to Fahrenheit or
Celsius mode

Fahrenheit
Celsius

05. Fan control in
Heating/Aux heat
selection

Determines if thermostat or
equipment controls fan in heating.
In heat pump applications, this is
also auxiliary heat selection.1

Gas or oil heat (equipment controls fan)
Electric heat (thermostat controls fan)

06. Extended fan –
Heat

Extends fan operation after heat
call ends

Disable
Enable (90 second extension)

07. Extended fan –
Cool

Extends fan operation after cool
call ends

Disable
Enable (90 second extension)

08. Internal sensor
offset

Field adjustment of internal
temperature sensor

0° : No offset applied
–4°F to +4°F (–2°C to +2°C)

09. Auto changeover

Enable or disable Auto changeover
mode

Disable
Enable

10. Remote sensor

Select if remote sensor is attached
or not

No
Yes

11. Outdoor sensor

Select if outdoor sensor is
attached or not

No
Yes

12. Compressor
minimum off time

Minimum off time for compressor
protection

5 minutes
1 to 5 minutes

13. Heating minimum
off time

Minimum off time for heating

2 minutes
1 to 5 minutes

14. Equipment
minimum on time

Minimum on time for heating and
cooling

2 minutes
1 to 5 minutes

15. Auto changeover
time

Minimum time between heating
and cooling calls

4 minutes
1 to 5 minutes

16. 1st stage
differential

1st stage differential

1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)

17. 2nd stage
differential

2nd stage differential

1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)

18. 3rd stage
differential

3rd stage differential

1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)

19. 4th stage
differential

4th stage differential

1°F (0.5°C)
1°F to 4°F (0.5°C to 2°C)

22. Screen lockout

Screen lockout level. (Override
lockout by holding [MENU] for 7
seconds)

OFF : No lockout
Partial lockout
Full lockout

In heat pump mode, this system setting is also the auxiliary heat setting. If utilizing a fossil fuel auxiliary heat system, set to Gas or Oil Furnace.
In this setting, the heat pump will lock out before the fossil fuel auxiliary heat comes on; eliminating the need for a dual fuel kit. If utilizing
electric auxiliary heat, set to Electric. In this setting, the heat pump and electric auxiliary heat are allowed to run simultaneously.

6

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Setup & Testing
INSTALLER SYSTEM SETTINGS TABLE (continued)
System setting

Description

Factory default setting (bold) and setting range

23. Partial lockout type

Select lockout type (only available
when screen lockout is set to
partial lockout)

Allow changes to Fan Mode, System Mode and Setpoints
Allow changes to Fan Mode and Setpoints only
Allow changes to Setpoints only

24. Max setpoint change
in lockout

Select setpoint limits (only
available when screen lockout is
set to partial lockout)

±3° F or C (from current setpoint)
±1° to 20° OFF indicates no setpoint changes

25. Integral factor period
(P+I control)

Short period = more cycles per
hour (comfort) Long period = less
cycles per hour (economical)

2 minutes
1 to 5 minutes or “OFF” for proportional control only

26. Deadband

Auto changeover mode dead band

3°F (2°C)
2°F to 9°F (1°C to 5°C)

27. Progressive recovery

Enable or disable Progressive
recovery

Disable
Enable

28. Low balance point

Outdoor temperature low balance
point (This option is only displayed
if the outdoor temperature sensor
is enabled)

20°F (–6°C)
10°F to 50°F (-12°C to 9°C) or OFF to ignore

29. High balance point

Outdoor temperature high balance
point (This option is only displayed
if the outdoor temperature sensor
is enabled)

65°F (18°C)
40°F to 65°F (3°C to 18°C) or OFF to ignore

30. Program format

Select weekly program format

7-day (Mon, Tue, Wed, Thu, Fri, Sat, Sun)
5/1/1 (weekdays, Saturday and Sunday)
5/2 (weekdays and weekends)
non-programmable

31. Event configuration

Setting for event naming

Residential
Commercial

32. Events per day

Number of program events per
day.

Selects 4 events per day
Selects 2 events per day

33. Change air filter
alarm

The period for displaying the
“Change Air Filter” message

OFF
1, 3, 6, 12 months or “OFF” to disable

34. Change water panel
alarm

Set number of months until the
first reminder is required. The
following reminders will occur
every 12 months for a flow through
humidifier, and 3/9 months for a
drainless humidifier

OFF
1 to 12 months or “OFF” to disable

35. Humidifier type

Select humidifier type. Flow
through type gives a 12 month
reminder, and drainless gives a
3/9 month reminder.

Flow through type humidifier (1 reminder per season)
Drain-less type humidifier (2 reminders per season)

36. Service dehumidifier
alarm

The period for displaying the
“Service Dehumidifier” message

OFF
1 to 12 months or “OFF” to disable

37. Service HVAC alarm

The period for displaying the
“Service HVAC” message

OFF
1 to 12 months or “OFF” to disable

38. Constant backlight

Enable constant, low intensity,
backlight when 24VAC is present.

Disable
Enable

39. Backlight intensity

Backlight intensity as a
percentage of full on

100
0 – 100%

40. Daylight savings

Enable or disable auto daylight
savings

OFF
March (second Sunday in March to the first Sunday
in November)
April (first Sunday in April to the last Sunday in October)

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Setup & Testing
System test menu
The system test menu is used to test a system after installation. The outputs of the thermostat can be manually
activated to test their function. The instructions below show how to enter the test mode and turn outputs on and off.
How to enter the system test menu:
Press [MODE] to set system to off.
Press and hold [FAN] and [MODE] for three seconds
to enter system test mode.
The screen of the first test step #60 is displayed:
TEST NUMBER

MODEL
(SW1 SETTING)

FLASHES
IF 24VAC
IS NOT
PRESENT

The test number is displayed on the upper left, and the
output state is displayed in the message center.
Press
to turn on the output (01). For multi stage
output, press
again to turn on the 2nd stage (02).
Press

to turn off all the output (00).

Press [BACK] or [NEXT] to change to the next test
step.
When the last step (63) is done, press [NEXT]. The
message “installer test complete“ will display.
All minimum on and off timers will be reset after
returning from system test mode.

OUTPUT
STATE

Note: Second stage will only be displayed when the
thermostat is set to multi-stage mode.

STAGE

Test Number

System test

60

Heating equipment test

61

Cooling equipment test

62

Auxiliary equipment test (HP only)

63

Fan equipment test

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Setup & Testing
SYSTEM TEST TABLES
Test 60: Heating Equipment Test
Button
Press

Equipment
Type

Stages

1st UP
press

Heat Cool

NA

Heat Pump

NA
1

2nd UP
press

Heat Cool

2

Heat Pump

Heat
Type

W

Gas

ON

Electric

ON

W2

Y

Y2

G

O

B
ON

NA

ON

NA

ON

Gas

ON

ON

Electric

ON

ON

ON

ON

ON

ON
ON
ON

ON

ON

ON

ON
ON

1

NA

ON

2

NA

ON

ON

ON

Y

Y2

G

O
ON

Test 61: Cooling Equipment Test
Button
Press

Equipment
Type

Stages

1st UP
press

Heat Cool

NA

ON

ON

Heat Pump

NA

ON

ON

ON

1

ON

ON

ON

2

ON

1

ON

2

ON

Y

2nd UP
press

Heat Cool
Heat Pump

W

W2

ON

ON

ON

ON

ON

ON

ON

ON

Y2

G

O

B

Test 62: Auxiliary Equipment Test (HP only)
Button
Press

Equipment
Type

1st UP
press

Heat Pump

2nd UP
press

Heat Pump

Heat
Type

W

W2

Gas

ON

Electric

ON

Gas

ON

ON

Electric

ON

ON

W

W2

B
ON

ON

ON
ON

ON

ON

Test 63: Fan Equipment Test
Button
Press
1st UP
press

Y

Y2

G

O

B

ON

9

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Quick Reference to controls & Display
Home Screen
Current DAY

ROOM TEMPERATURE

OUTDOOR TEMPERATURE

TEMPERATURE SETTING

FAN MODE
BUTTON
Temperature
ADJUSTMENT

FAN MODE
SETTING
SYSTEM MODE
BUTTON

HOLD BUTTON
(SETS OR CLEARS HOLD)

SYSTEM MODE
SETTING

Heat pump mode only
Emergency heat (RED)
System FAULT (YELLOW)

EQUIPMENT
STATUS

Indicator shows through housing

MESSAGE
CENTER
(SCROLLING TEXT)

LOW BATTERY
INDICATOR

CURRENT TIME & DATE

MAIN MENU BUTTON

Note: Backlight is activated with first button press and automatically turns off.

MAIN MENU
CLEAN SCREEN
(LOCKOUT TOUCH SCREEN
FOR 30 SECONDS)
SET VACATION HOLD
(HOLD–TO TIME AND DATE)
SET CURRENT TIME

SET SCHEDULE
BUTTON

SET CURRENT DATE

DONE BUTTON
(EXIT MENU)

USER SYSTEM SETTINGS

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Troubleshooting
Display is blank

Fan does not turn on in a call for heat

• Check circuit breaker and reset if necessary.
• Make sure power switch at heating & cooling
system is on.
• Make sure furnace door is closed securely.
• If thermostat is battery powered, make sure fresh AA
alkaline batteries are correctly installed.
Temperature settings do not change
Make sure heating and cooling temperatures are set to
acceptable ranges:
• Heat: 40° to 90°F (4° to 32°C).
• Cool: 50° to 99°F (10° to 37°C).
Heating system does not respond
(“HEATING” appears on screen)
• Check for 24VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the heating
equipment to find the cause of the problem.
• Check for 24VAC between the heat terminal (W)
and the transformer common. If 24VAC is present,
the thermostat is functional. Check the heating
equipment to find the cause of the problem.
• Check for loose or broken wires between the
thermostat and the heating equipment.
Cooling system does not respond
(“COOLING” appears on screen)
• Check for 24VAC at the equipment on the secondary
side of the transformer between power and
common. If voltage is not present, check the cooling
equipment to find the cause of the problem
• Check for 24VAC between the cooling terminal (Y)
and the transformer common. If 24VAC is present,
the thermostat is functional. Check the cooling
system to find the cause of the problem.
• Check for loose or broken wires between the
thermostat and the cooling equipment.

• Check System Setting 05 (Fan Control), to make sure
the fan control is properly set to match the type of
system (see page 6).
Heat pump issues cool air in heat mode,
or warm air in cool mode
• Check wiring at the terminal block to confirm the
reversing valve is connected to the proper terminal.
O is active in cooling and B is active in heating.
Heat/cool both on at same time
• Check SW1 (Equipment Type), to make sure it is set
to match the installed heating/cooling equipment
(see page 5).
• Check to make sure heating and cooling wires are
not shorted together.
Heating equipment is running in cool
mode
• Check SW1 (Equipment Type), to make sure it is set
to match the installed heating/cooling equipment
(see page 5).
“HEATING” is not displayed
• Check Installer System Setting number 01
(Control Setup) is set correctly.
• Change the System Mode to Heat, and set
the temperature level above the current room
temperature.
“COOLING” is not displayed
• Check Installer System Setting number 01
(Control Setup) is set correctly.
• Change the System Mode to Cool, and set
the temperature level below the current room
temperature.

Error Codes
If the thermostat enters an error mode, all outputs are turned off. The thermostat attempts to recover every 10 minutes.
If the error does not clear, use the reset button. This will return all settings back to factory default.
Error code
01
02
04

Message
“SENSOR ERROR”
“EEPROM ERROR”

Error Description
Open temperature sensor circuit
Shorted temperature sensor circuit
Error in permanent memory
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Thermostat Features
• Large touch screen with adjustable backlight –
constant backlight option available with 24VAC.

• Air filter, humidifier, dehumidifier, and HVAC service
indicators.

• Message center provides feedback and instructions.

• Programmable fan control with fan circulation mode.

• 7 day programmability or separately programmable
weekday/weekend schedules.

• Easy to use temperature control can override program
schedule at any time.

• Thermostat can be removed from the wall for easy
programming (batteries must be installed).

• Progressive recovery ensures proper temperature at
the start of a program event.

• Front battery door access for fast, easy replacement.

• Built in compressor protection prevents damage to
your equipment.

• Displays room temperature, temperature setting, and
optional outdoor temperature.

• Dual power option (battery or 24VAC).
• System test mode.

Specifications
Environment
Temperature

Operating: 32° to 120°F (0° to 48.9°C)
Shipping: -30° to 150°F (-34.4° to 65.5°C)

Relative humidity

Operating: 5% to 90% R.H. (non-condensing)

Operating voltage

24VAC (18 – 30VAC)

Current

Maximum: 2.5A (total), 1.0A (single output)
Maximum surge current: 5A

Electrical

Dual power. Can be battery or 24VAC powered.
Power supply

Battery power

When both the sources are available, battery will be used as
back up power.
Battery power: AA size alkaline battery x 2
Battery life: Approximately 1 year
Thermal

Outdoor & Remote temperature sensor

Maximum distance: 300 feet

Room temperature measurement

Display range: 32° to 99°F (0° to 40°C)

Outdoor temperature measurement

Display range: -20° to 130°F (-30° to 55°C)

Setpoint temperature range

Heat: 40° to 90°F (4° to 32°C)
Cool: 50° to 99°F (10° to 37°C)

P.O. Box 1467 • Madison, WI 53701-1467 • Phone: 800/334-6011 • Fax: 608/257-4357
www.aprilairepartners.com
61000729 10.10
B2205243A

© 2010 Aprilaire – A division of Research Products Corporation

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