Aprilaire Thermostat 8910 Users Manual

8910 to the manual 0374423f-bce5-4dc7-ba9d-5c4cd63752e0

: Aprilaire Aprilaire-Thermostat-8910-Users-Manual-467308 aprilaire-thermostat-8910-users-manual-467308 aprilaire pdf

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Home Comfort Control™

Model 8910

Thermostat installation location recommendations ...2

Thermostat mounting...........................2

Equipment control module installation location

recommendations..............................2

Equipment control module mounting ..............2

Thermostat wiring .............................3

Remote temperature sensor (optional) .............3

Equipment control module wiring .................4

Outdoor temperature sensor .....................5

Optional wireless outdoor temperature sensor ......5

Return air temperature sensor (optional) ...........6

Leaving air temperature sensor (optional) ..........6

TABLE OF CONTENTS

INSTALLATION POWER & RESET OPTIONS

SETUP & TESTING

REFERENCES

HVAC WIRING DIAGRAMS

INDOOR AIR QUALITY WIRING DIAGRAMS

Power and reset options .......................10

Equipment type selection switch (SW1) ...........11

Installer setup menu ..........................11

Change system settings........................11

HVAC installer system settings table ..........12-13

Indoor Air Quality system settings tables..........14

Air cleaning sytem settings table ..............14

Humidifier system settings table ...............14

Dehumidifier system settings table .............15

Ventilation system settings table...............16

System test menu .........................17-18

System test tables.........................18-20

Quick reference to controls & display..........21-22

Troubleshooting ...........................22-23

Error codes ..................................23

Home Comfort Control features .................23

Specifications................................24

Conventional heat/cool single transformer..........7

Conventional heat/cool two transformer ...........7

Heat pump single transformer....................8

Heat pump two transformer .....................8

Indoor Air Quality wiring with separate transformers ...9

Indoor Air Quality wiring with a single transformer.....9

Safety &

Installation

Instructions

READ AND SAVE THESE INSTRUCTIONS

2 3

INSTALLATION

THERMOSTAT INSTALLATION LOCATION RECOMMENDATIONS

EQUIPMENT CONTROL MODULE INSTALLATION LOCATION RECOMMENDATIONS

Thermostat should be mounted:

 

 

 

 

Equipment control module should be mounted:

 

140°F (60°C) or drop below 32°F (0°C).

Do not mount thermostat:

 

 

appliances that give off heat.

 

 

outside doors.

 

REMOTE TEMPERATURE SENSOR (OPTIONAL)

THERMOSTAT WIRING

A remote temperature sensor can be used if the thermostat is 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



override the thermostat’s internal temperature sensor.

123T1T2

Remote temperature sensor should be

mounted:

 

space.

 

 

 

Do not mount remote sensor:

 

spaces.

 

other appliances that give off heat.

 

 

or near outside doors.

 

 

THERMOSTAT MOUNTING

EQUIPMENT CONTROL MODULE 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.





6. Seal wire entry holes to prevent drafts affecting temperature

readings.

The Equipment Control Module has the following features to simplify mounting and wiring and provide for a clean

and neat installation.

 

be utilized. Mount the Equipment Control Module using 2 to 4 #8 screws appropriate for the mounting surface

substrate. (See Figure 2.)

 



 

to secure wires in 10 places.

Installation Steps

1. Select mounting location.

2. Pull from bottom to remove

front cover. (See Figure 1.)

3. Mount base using 2 to 4 #8

screws (field supplied).

123T1T2

INSTALLATION

Do not mount equipment control module:

 

ductwork. These locations can cause moisture to

condense on the equipment control module.

Wire specifications:

18-24 gauge thermostat wire

Installation notes:

 

 

and re-tighten.

 

1 – Connection to terminal 1 at equipment control module

2 – Connection to terminal 2 at equipment control module

3 – Connection to terminal 3 at equipment control module

T1 & T2 – Remote temperature sensor (optional)

Figure 1 Figure 2

Note:

loss of programs due to electrical discharge.

4 5

INSTALLATION INSTALLATION

EQUIPMENT CONTROL MODULE WIRING

Wire specifications:

18-24 gauge thermostat wire

Installation notes:

 

 

and re-tighten.

 

channels.

1 – Connection to terminal 1 at thermostat

2 – Connection to terminal 2 at thermostat

3 – Connection to terminal 3 at thermostat

RAT – Return air temperature sensor (optional)

LAT – Leaving air temperature sensor (optional)

ODT – Outdoor temperature sensor (optional)

C – 24VAC common

R – 24VAC

RC – 24VAC Cooling

RH – 24VAC Heating

W

W2

pump)

W3/B – Third stage heat (conventional)/reversing valve

(heat pump)

Y – First stage cooling (conventional)/first stage compressor

(heat pump)

Y2 – Second stage cooling (conventional)/second stage

compressor (heat pump).

Y3/0 – Third stage cooling (conventional)/reversing valve

(heat pump)

G – Fan

L – System fault indicator (heat pump only) (optional)

CEQ – 24VAC common from heat pump for system fault

indicator (optional)

HUM – Humidifier

DHno & DHcom

DHnc & DHcom

VENT – Ventilation

EAC – Electronic Air Cleaner

OUTDOOR TEMPERATURE SENSOR

OPTIONAL WIRELESS OUTDOOR TEMPERATURE SENSOR

Outdoor temperature can be measured by installing an 8052 sensor (included) to the ODT terminals and enabling the



In heat pump mode the outdoor temperature sensor can be used to efficiently utilize an air source heat pump:







only the heat pump will be used to provide heating.

Indoor Air Quality functions can use the outdoor temperature sensor to:









Outdoor temperature sensor should

be mounted:



(north side recommended).





condensing lines.











Instructions for detailed directions regarding installation.

Outdoor Sensor

6 7

INSTALLATION HVAC WIRING DIAGRAMS

LEAVING AIR TEMPERATURE SENSOR (OPTIONAL)

CONVENTIONAL HEAT/COOL SINGLE TRANSFORMER (USE JUMPER)

Leaving air temperature can be measured by attaching an 8052 sensor to the LAT terminals. The leaving air

temperature sensor measurement is displayed during the installer test for diagnostic purposes.

IMPORTANT



the sensor to report false temperature readings.



shaded areas in figure below.)

2. Mount the sensor according to the installation instructions provided with the sensor.

3. Wire the sensor to the equipment control module LAT terminals.

W

W2

W3

Y

Y2

Y3

G

HC HP

EQ

3

C

RC

RH

L

G

O

Y2

Y

B

W2

W

R

C

TRANSFORMER

2nd HEATING

1st HEATING

THERMOSTAT

FAN

1st COMPRESSOR

2nd COMPRESSOR

2

1

3rd HEATING

3nd COMPRESSOR

LOCATE





AREA.

CONVENTIONAL HEAT/COOL TWO TRANSFORMER (REMOVE JUMPER)

HEATING TRANSFORMER

COOLING TRANSFORMER

C

R

W

W2

B

Y

Y2

O

G

L

RH

RC

C

3

EQ

HPHC

G

Y3

Y2

Y

W3

W2

W

TRANSFORMER

THERMOSTAT

1

2

2nd COMPRESSOR

1st COMPRESSOR

FAN

1st HEATING

2nd HEATING

3rd COMPRESSOR

1R and C can be

powered from the

HVAC equipment

transformer or any

other constantly

powered 24VAC

source.

1

RETURN AIR TEMPERATURE SENSOR (OPTIONAL)

Return air temperature can be measured by attaching an 8052 sensor to the RAT terminals. The return sensor must

be enabled in the installer set-up menu. The return air temperature sensor provides protection in the event that the



the equipment control module will use the return air temperature sensor to maintain a temperature greater than 40°F

and less than 100°F.

1. Locate the Aprilaire Model 8052 sensor

in the return trunk.

2. Mount the sensor according to the

installation instructions provided with

the sensor.

3. Wire the sensor to the equipment

control module RAT terminals.

8 9

Note: Outputs are 24VAC dry contact. Please see individual product installation instructions for more details.

HVAC WIRING DIAGRAMS

HEAT PUMP SINGLE TRANSFORMER (USE JUMPER WIRE)

C

R

W

W2

B

Y

Y2

O

G

L

RH

RC

C

3

EQ

HPHC

G

Y3

Y2

Y

W3

W2

W

FAULT DETECT

REVERSING VALVE

THERMOSTAT

REVERSING VALVE

1

2

2nd COMPRESSOR

1st COMPRESSOR

FAN

1st HEATING

2nd HEATING

HEAT PUMP TRANSFORMER

HEAT PUMP TWO TRANSFORMER (REMOVE JUMPER WIRE)

THERMOSTAT

TRANSFORMER

W

W2

W3

Y

Y2

Y3

G

HC HP

EQ

3

C

RC

RH

L

G

O

Y2

Y

B

W2

W

R

C

HEAT PUMP TRANSFORMER

HEATING TRANSFORMER

1

FAULT DETECT

REVERSING VALVE

REVERSING VALVE

2nd HEATING

1st HEATING

FAN

1st COMPRESSOR

2nd COMPRESSOR

2

1

1R and C can be

powered from the

HVAC equipment

transformer or any

other constantly

powered 24VAC

source.

INDOOR AIR QUALITY WIRING DIAGRAMS

INDOOR AIR QUALITY WIRING WITH SEPARATE TRANSFORMERS

INDOOR AIR QUALITY WIRING WITH A SINGLE TRANSFORMER

TRANSFORMER

TRANSFORMER

TRANSFORMER

VNT

DH

HUM

EAC

DH

DHno

com

nc

DEHUMIDIFIER

NORMALLY

CLOSED DAMPER

HUMIDIFIER

PILOT RELAY FOR

120 VAC TO EAC

nc

com

no

DH

DH

EAC

HUM

DH

VNT

TRANSFORMER

HUMIDIFIER

8120 DAMPER

DEHUMIDIFIER

PILOT RELAY FOR

120 VAC TO EAC

Note: Outputs are 24VAC dry contact. Please see individual product installation instructions for more details.

10 11

POWER & RESET OPTIONS

The equipment control module is powered from

24VAC. The thermostat is powered from the equipment

interface module and has a battery back-up option for

the clock.

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 equipment

control module 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.

SETUP & TESTING

INSTALLER SETUP MENU

CHANGE SYSTEM SETTINGS

HOW TO ENTER THE INSTALLER SETUP MENU AND SELECT EQUIPMENT TO SETUP:





Press [MODE] to set system to OFF.

Press [MENU] to enter main menu.

Press and hold [SETUP][INSTALL

SETUP] appears.

Press [INSTALL SETUP] to enter installer setup menu.

Press or 

Press [MENU]

Press [NEXT] to select option.

Press or



Air Quality) option.

Press [NEXT] to select Outdoor Sensor setting or IAQ

(Indoor Air Quality) option.

System Settings can now be changed.

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

Press or 

Press [DONE][CANCEL]

without saving.



is pressed within 60 seconds.



the thermostat by pressing the [RESET] button for 5

seconds.













EQUIPMENT TYPE SELECTION SWITCH (SW1)

This Home Comfort Control 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 is displayed in the Installer System

Settings under Equipment Type.

Note: Home Comfort Control reboots within 10 seconds

after switch position is changed. HC

HP

SW1

HEAT/COOL



HC

HP

RESET

BUTTON

12 13

System setting Description

Factory default setting (bold)

and setting range

19. Fourth Stage Differential 4th stage differential. 1°F (0.5°C)

1°F to 9°F (0.5°C to 4.5°C)

  Disable

Enable

  3°F (2°C)

3°F to 5°F (2°C to 3°C)

22. Screen Lockout Screen lockout level. (Override lockout by holding



Off

Part

Full

23. Partial Lockout Type Select lockout type. (Only available when screen

lockout is set to partial.)

Fan/Mode/Setpt

Fan/Setpoints

Setpoints Only



Change In Lockout

Select temperature setpoint limits. (Only available

when screen lockout is set to partial.)

3 degrees

0 to 20 degrees



Change In Lockout

Select dehumidification setpoint limits. (Only

available when screen lockout is set to partial.)

5 Percent RH

0 to 15 Percent RH

25. Stage Rate Accumulation of equipment run time in equipment

staging determination.

1 = more rapid staging of equipment (comfort)

5 = slower staging of equipment (economy)

2



run time.

27. Progressive Recovery Enable or disable progressive recovery. Disable

Enable

 Outdoor temperature low balance point. (This

option is only displayed if the outdoor sensor is

enabled.)

20°F (-6°C)

10°F to 50°F (-12°C to 9°C) or OFF to

ignore

 Outdoor temperature high balance point. (This

option is only displayed if the outdoor sensor is

enabled.)

65°F (18°C)

40°F to 85°F(3°C to 18°C) or OFF to

ignore

30. Program Format Select weekly program format. 7-Day



5/2 Weekdays (weekdays and weekends)



32. Events Per Day  Four

Two

33. Reset Service Reminders Clears the Change Air Filter and HVAC and

Dehumidifier Service reminders if they are active

and resets the start date to the current date.

Clears the Change Water Panel reminder if it is



will be reset.

No

Yes

37. HVAC Service Reminder The period for displaying the “HVAC Service



Off



 

24VAC is present.

Disable

Enable

  100 Percent

0 to 100 Percent

40. Auto Daylight Savings Enable or disable auto daylight savings. Off

March (second Sunday in March to the



April (first Sunday in April to the last

Sunday in October)

SETUP & TESTINGSETUP & TESTING

HVAC INSTALLER SYSTEM SETTINGS TABLE (CONTINUED)

The following table contains the system settings and their details. Default settings are shown in bold. Some settings

are only available dependent upon the value of other settings.

HVAC INSTALLER SYSTEM SETTINGS TABLE

System setting Description

Factory default setting (bold)

and setting range

00. Equipment Type Equipment type set by SW1. Heat /Cool

Heat Pump

01. Control Setup 

available in Heat/Cool mode.)

Heat and Cool

Heat Only

Cool Only

 

available in Heat/Cool mode.)

One

Two

Three

  One

Two

04. Temperature Scale Set the thermostat to Fahrenheit or Celsius mode. Fahrenheit

Celsius

05. Heat/Cool: Fan Control

in Heating



Equipment Type

Heat/Cool: Determines if the thermostat or

equipment controls the fan in heating.



Gas/Oil Heat (equipment controls fan)

Electric Heat (thermostat controls fan)

  Disable



  Disable



08. Internal Temp Sensor

Offset

 0° (no offset applied)

-4°F to +4°F (-2°C to +2°C)

35. Internal RH Sensor Offset  0 (no offset applied)

-5% to +5%

09. Auto Changeover Enable or disable auto changeover mode. Disable

Enable

26. Deadband Auto Changeover mode deadband. 3°F (2°C)

2°F to 9°F (1°C to 5°C)

10. Remote Sensor Select if remote sensor is attached. No

Yes

11. Outdoor Sensor Select if outdoor sensor is attached or not. No

Yes

35. Return Sensor Select if return sensor is attached or not. No

Yes

12. Compressor Min Off Time Minimum off time for compressor protection. 5 minutes

1 to 5 minutes

13. Heating Min Off Time Minimum off time for heating. 2 minutes

1 to 5 minutes

14. Equipment Min 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. First Stage Differential 1st stage differential. 1°F (0.5°C)

1°F to 9°F (0.5°C to 4.5°C)

17. Second Stage Differential 2nd stage differential. 1°F (0.5°C)

1°F to 9°F (0.5°C to 4.5°C)

18. Third Stage Differential 3rd stage differential. 1°F (0.5°C)

1°F to 9°F (0.5°C to 4.5°C)

14 15

SETUP & TESTINGSETUP & TESTING

The following tables contain the Indoor Air Quality system settings and their details. Default settings are shown in

bold. Some settings are only present dependent upon the value of other settings.

The use of an outdoor temperature sensor (recommended) enables additional Indoor Air Quality functionality. If the



will be presented prior to entering the Indoor Air Quality system settings.

Please refer to the Model 8910 Owner’s Manual for further information about Home Comfort Control features.

Air Cleaning System Settings Table

System setting Description

Factory default setting (bold)

and setting range

Air Cleaner Installed 

air cleaning settings will be available.)

No

Yes

Change Air Filter Reminder  Off



Humidifier System Settings Table

System setting Description

Factory default setting (bold)

and setting range

Humidifier Installed 

humidifier settings will be available.)

No

Yes

Humidity Setpoint

Deadband

Select the minimum difference between the humidifier and

dehumidifier setpoints. (Only available if both a humidifier

and dehumidifier are installed. Available in both set-ups.)

10 Percent RH

10 to 20 Percent RH

Humidifier Mode Selects auto or manual mode. Auto mode controls humidity

based on the humidity setting and outdoor temperature.

Manual mode controls humidity based on the %RH setpoint.

(Auto mode is only available if outdoor sensor is set to yes.)

Auto

Manual

Humidifier Operation Selects when humidification is allowed to occur relative to

heating and fan operation.

Heat Only

Heat or Fan

Forces Fan

Change Water Panel

Reminder



displayed.

Off

1 Per Season

2 Per Season

300 Hours

600 Hours

Reminder Month (Change

Water Panel Reminder set

to 1 per Season)

First Reminder Month

(Change Water Panel

Reminder set to 2 per

Season)

Change Water Panel Reminder set to 1 per Season:



is displayed.

Change Water Panel Reminder set to 2 per Season:



message is displayed.

October



December

January

February

March

April

May

June

July

August

September

Second Reminder Start

Month



message is displayed. (Only available when Change Water

Panel Reminder set to 2 per Season.)

October



December

January

February

March

April

May

June

July

August

September

INDOOR AIR QUALITY SYSTEM SETTINGS TABLES Dehumidifier System Settings Table

System setting Description

Factory default setting (bold)

and setting range

Dehumidifier Control 

other dehumidifier settings will be available.)

None (no dehumidification installed)

Whole Home

Air Conditioner

Humidity Setpoint Deadband Select the minimum difference between the humidifier

and dehumidifier setpoints. (Only available if both a

humidifier and dehumidifier are installed. Available in

both set-ups.)

10 Percent RH

10 to 20 Percent RH

Lockout Dehumidifier During

Cooling

Selects if dehumidification is disabled during a cooling

call.



Yes

Dehumidifier Forces Fan Select if dehumidification can turn on the fan. 

Yes

Dehumidifier Service

Reminder

The period for displaying the “Dehum Service



Off



Dehumidifier Overcooling

Limit

Selects the amount of overcooling that can occur for

dehumidification. (Only available if dehum control is

set to air conditioner.)

3°F (1.5°C)

1°F to 3°F (0.5°C to 1.5°C)

Dehumidify in Vacation

Mode

Selects if dehumidification with the air conditioner

is done in Vacation Mode. (Only available if dehum

control is set to air conditioner.

No

Yes

Vacation Dehumidifier Low

Temp Limit

Sets the lowest temperature the air conditioner will

cool to meet RH setpoint in Vacation Mode. (Only

available if dehum control is set to air conditioner.)

75°F (24°C)

70°F to 85°F (21°C to 29°C)

Note:

installation and operation.

16 17

SETUP & TESTING

Ventilation System Settings Table

System setting Description

Factory default setting (bold)

and setting range

Fresh Air Vent Installed Selects if ventilation is installed.



No

Yes

Fresh Air Forces Fan Selects if ventilation forces the fan on. 

Yes

Fresh Air Setup Selects if ventilation is configured through the ASHRAE setup



time will be calculated using the ASHRAE recommendations.



determined based on the Fresh Air Time value.

Timed

ASHRAE

Fresh Air Time Selects how many minutes per hour that ventilation will be

active. (Only available if fresh air setup is set to timed.)

30 MIN/HR



High Limit Outdoor

Temp

Selects if ventilation is disabled if the outdoor temperature



is set to timed and an outdoor temperature sensor is installed.)

No

Yes

Outdoor High Limit Sets the high temperature limit for ventilation. (Only available if

high limit outdoor temp set to yes.)

100°F (38°C)

90°F to 100°F (32°C to 44°C)

Low Limit Outdoor Temp Selects if ventilation is disabled if the outdoor temperature



is set to timed and an outdoor temperature sensor is installed.)

No

Yes

Outdoor Low Limit Sets the low temperature limit for ventilation. (Only available if

low limit outdoor temp set to yes.)

10°F (-7°C)

-10°F to 30°F (-29°C to -1°C)

High Limit Indoor RH 

the indoor RH limit. (Only available if fresh air setup is set to

timed.)

No

Yes

Indoor RH Limit Sets the high indoor RH limit for ventilation. (Only available if

high limit indoor RH is set to yes.)

60%

50% to 70%

 Selects the number of bedrooms to be used for the ASHRAE

calculation. (Only available if fresh air setup is set to ASHRAE.)

3 Bedrooms



 Selects the number of occupants to be used for the ASHRAE

calculation. (Only available if fresh air setup is set to ASHRAE.)

4 Occupants

1 to 10 Occupants

Home Size Selects the home size to be used for the ASHRAE calculation.

(Only available if fresh air setup is set to ASHRAE.)

2500 SQ FT

1000 to 5000 SQ FT

Fresh Air CFM Selects the ventilation CFM to be used for the ASHRAE

calculation. (Only available if fresh air setup is set to ASHRAE.)

60 CFM

30 to 200 CFM

Select Climate Selects the climate to be used for the ASHRAE calculation.

(Only available if fresh air setup is set to ASHRAE.)

Normal

Very Hot/Humid

Very Cold

ASHRAE Cycle Time Displays the Fresh Air Time calculated by the ASHRAE

standard. (Only displayed if fresh air setup is set to ASHRAE.)

Minutes/Hour

Note: In ASHRAE set-up temperature and humidity limits are disabled.

SETUP & TESTING

SYSTEM TEST MENU

The system test menu is used to test a system after installation. The outputs of the Home Comfort Control can be

manually activated to test their function. The instructions below show how to enter the test mode and turn outputs

on and off.

Each equipment test will begin with the selection of turning on the output or stage as shown below.

Press or to change the selection.

Press [NEXT]

If YESNO



SYSTEM TEST STEPS

Heating equipment test

Cooling equipment test

Fan equipment test

Humidification equipment test

Dehumidification equipment test

Ventilation equipment test

Air Cleaning equipment test

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 first screen of the installer test displays the

equipment configuration.

Press [NEXT] to enter the first installation test or

[CANCEL]



























18 19

SETUP & TESTING SETUP & TESTING

SYSTEM TEST MENU (CONTINUED) SYSTEM TEST TABLES (CONTINUED)

SYSTEM TEST TABLES

While the equipment test is active the corresponding test information will be shown.

Press [NEXT]



















TEST THAT

IS ACTIVE

Heat / Cool Heating Equipment Test

Heat Type W W2 W3 Y Y2 Y3 G

 1st Stage Test 

 2nd Stage Test  

 3rd Stage Test   

Electric 1st Stage Test  

Electric 2nd Stage Test   

Electric 3rd Stage Test    

Heat Pump Heating Equipment Test (Electric Heat)

Compressor

Stages

Aux

Stages W W2 B Y Y2 O G

1 1 1st Stage Test   

1 1 2nd Stage Test    

2 1 1st Stage Test   

2 1 2nd Stage Test    

2 1 3rd Stage Test     

1 2 1st Stage Test   

1 2 2nd Stage Test    

1 2 3rd Stage Test     

2 2 1st Stage Test   

2 2 2nd Stage Test    

2 2 3rd Stage Test     

2 2 4th Stage Test      

Heat Pump Heating Equipment Test (Gas Heat)

Compressor

Stages

Aux

Stages W W2 B Y Y2 O G

1 1 1st Stage Test   

1 1 2nd Stage Test  

2 1 1st Stage Test   

2 1 2nd Stage Test    

2 1 3rd Stage Test  

1 2 1st Stage Test   

1 2 2nd Stage Test  

1 2 3rd Stage Test   

2 2 1st Stage Test   

2 2 2nd Stage Test    

2 2 3rd Stage Test  

2 2 4th Stage Test   

20 21

Heat / Cool Cooling Equipment Test

W W2 W3 Y Y2 Y3 G

1st Stage Test  

2nd Stage Test   

3rd Stage Test    

Heat Pump Cooling Equipment Test

W W2 B Y Y2 O G

1st Stage Test   

2nd Stage Test    

Fan Equipment Test

W W2 W3/B Y Y2 Y3/O G



Humidification Equipment Test

HUM DHNO/DHCOM VENT EAC G

 

Dehumidification Equipment Test

HUM DHNO/DHCOM VENT EAC G

 

Ventilation Equipment Test

HUM DHNO/DHCOM VENT EAC G

 

Ventilation Equipment Test

HUM DHNO/DHCOM VENT EAC G

 

SETUP & TESTING

SYSTEM TEST TABLES (CONTINUED)

QUICK REFERENCE TO CONTROLS & DISPLAY

HOME SCREEN

MAIN MENU



























NOTE:









SYSTEM MODE



SYSTEM MODE





  





™ AIR















(SETS OR CLEARS HOLD)

HEAT PUMP ONLY























   

22 23

TROUBLESHOOTING

TROUBLESHOOTINGQUICK REFERENCE TO CONTROLS & DISPLAY

DISPLAY IS BLANK

If Power LED not illuminated at the equipment control

module check the following.





system is on.



POWER/STATUS – On solid during normal operation. Flashes

when connection to the thermostat is lost and at power-up while

the thermostat connection is being established.

HEATING – On when heating outputs are active.

COOLING – On when cooling outputs are active.

FAN – On when fan output is active.

HUMIDIFIER – On when humidifier output is active.

DEHUMIDIFIER – On when dehumidifier output is active.

VENTILATION – On when ventilation output is active.

AIR CLEANING – On when air cleaner output is active.

HEATING SYSTEM DOES NOT RESPOND

(“HEATING” APPEARS ON SCREEN)



side of the transformer between power and



equipment to find the cause of the problem.





the Home Comfort Control is functional. Check the

heating equipment to find the cause of the problem.



Comfort Control and the heating equipment.

COOLING SYSTEM DOES NOT RESPOND

(“COOLING” APPEARS ON SCREEN)



side of the transformer between power and



equipment to find the cause of the problem





the Home Comfort Control is functional. Check the

cooling system to find the cause of the problem.



Comfort Control and the cooling equipment.

FAN DOES NOT TURN ON IN A CALL FOR HEAT



the fan control is properly set to match the type of

system.

HEAT PUMP ISSUES COOL AIR IN HEAT MODE,

OR WARM AIR IN COOL MODE



reversing valve is connected to the proper terminal.



HEAT/COOL BOTH ON AT SAME TIMEEQUIPMENT CONTROL MODULE LEDs



to match the installed heating/cooling equipment.



not shorted together.

HEATING EQUIPMENT IS RUNNING IN

COOL MODE



to match the installed heating/cooling equipment

(see page 11).

“HEATING” IS NOT DISPLAYED



(Control Setup) is set correctly.



the temperature level above the current room

temperature.

“COOLING” IS NOT DISPLAYED



(Control Setup) is set correctly.



the temperature level below the current room

temperature.

ERROR CODES





Error code Message Error Description

01  Open temperature sensor circuit

02 Shorted temperature sensor circuit

03  Error in permanent memory

05  Thermostat lost connection to equipment interface module

HOME COMFORT CONTROL™ FEATURES



– Humidification automatic or manual control.

– Dehumidification.

™ air cleaning.

– Ventilation with temperature and humidity limits.



™ raises the room temperature 3°F to 5°F.



sensor.



constant backlight option available.





weekday/weekend schedules.



programming (batteries must be installed).









reminders.





schedule at any time.



the start of a program event.



your equipment.



24

 

www.aprilairepartners.com

61000850 12.11



Patent Pending

© 2011 Aprilaire – A division of Research Products Corporation

Control

 

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

Return and Leaving temperature measurement Display range: -20° to 160°F (-30° to 71°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)

Setpoint humidity range Humidification: 10% to 50% R.H.

Dehumidification: 50% to 90% R.H.

SPECIFICATIONS

Electrical

Operating voltage 24VAC (18 – 30VAC)

Current 



 

Environment

Temperature (Shipping) -30° to 150°F (-34° to 65°C)

Temperature Thermostat (Operating) 32° to 120°F (0° to 48°C)

Temperature Equipment Control Module (Operating) 32° to 158°F (0° to 70°C)

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