Thermostat Installation location recommendations
Thermostat should be mounted
Do not mount thermostat
Thermostat mounting
Equipment Control Module Installation Location Recommendations
Note: Installer must touch a grounded metal object before handling the Equipment Control Module to avoid potential loss of programs due to electrical discharge.
Equipment control module should be mounted
Do not mount equipment control module
Equipment Control Module Mounting
The Equipment Control Module has the following features to simplify mounting and wiring and provide for a clean and neat installation.
Installation notes
Remote temperature sensor (optional)
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 in a recommended area. The remote sensor must be enabled in the installer set-up menu, and once enabled will override the thermostat’s internal temperature sensor.
A remote temperature sensor should be mounted
Do not mount the remote sensor
Equipment Control Module Wiring
Installation notes
Outdoor temperature sensor
Outdoor temperature can be measured by installing an 8052 sensor (included) to the ODT terminals and enabling the outdoor sensor in the installer set-up menu. When an outdoor sensor is installed, the features below will be enabled
In heat pump mode the outdoor temperature sensor can be used to efficiently utilize an air source heat pump
Indoor Air Quality functions can use the outdoor temperature sensor to
The outdoor temperature sensor should be mounted
optional wireless Outdoor temperature sensor
For installations where it is difficult to wire the included 8052 outdoor temperature sensor, a Model 8056 wireless outdoor temperature module can be used. The Model 8056 module has two radio units, one that is placed on the equipment control module as shown below, and a second radio that is placed outside. See the Model 8056 Installation Instructions for detailed directions regarding installation.
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 equipment control module loses connection with the thermostat. In the event that the thermostat connection is lost, the equipment control module will use the return air temperature sensor to maintain a temperature greater than 40°F and less than 100°F.
Leaving Air Temperature Sensor (Optional)
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
Do not mount the sensor in direct line of sight of the heat exchanger, cooling coils, or UV lights as this may cause the sensor to report false temperature readings.
Conventional Heat/Cool Single Transformer (Use Jumper)
Conventional Heat/Cool Two Transformer (remove Jumper)
Heat Pump Single Transformer (Use Jumper Wire)
Heat Pump Two Transformer (Remove Jumper Wire)
Indoor Air Quality wiring with separate transformers
Note: Outputs are 24VAC dry contact. Please see individual product installation instructions for more details.
Indoor Air Quality wiring with a single transformer
Note: Outputs are 24VAC dry contact. Please see individual product installation instructions for more details.
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.
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.
How to enter the installer setup menu AND SELECT EQUIPMENT TO SETUP
In the Installer Setup, HVAC or Indoor Air Quality setup can be selected. If Indoor Air Quality setup is selected, the user can then select to set up Air Cleaning, Humidification, Dehumidification or Ventilation.
Change System Settings
HVAC INSTALLER SYSTEM SETTINGS TABLE
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.
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 | Used to lockout heating or cooling outputs. (Only available in Heat/Cool mode .) | Heat and Cool Heat Only Cool Only |
02. Number of Stages | Number of equipment stages. (Three is only available in Heat/Cool mode .) | one Two Three |
03. Aux Heat Stages | Number of auxiliary heat equipment stages. | one Two |
04 . Temperature Scale | Set the thermostat to Fahrenheit or Celsius mode . | fahrenheit Celsius |
05 . Heat/Cool: Fan Control in Heating Heat Pump: Auxiliary Equipment Type | Heat/Cool: Determines if the thermostat or equipment controls the fan in heating . Heat Pump: Auxiliary Equipment type. | gas/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 Temp Sensor Offset | Field adjustment of internal temperature sensor. | 0° (no offset applied) -4°F to +4°F (-2°C to +2°C) |
35 . Internal RH Sensor Offset | Field adjustment of internal RH sensor. | 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) |
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) |
20. Heat Blast | Enables the Heat Blast feature. | Disable Enable |
21. Blast Offset | Amount of heating when Heat Blast is initiated. | 3°f (2°C) 3°F to 5°F (2°C to 3°C) |
22 . Screen Lockout | Screen lockout level . (Override lockout by holding [MENU] for 7 seconds.) | 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 |
24. Max Temp Setpoint Change In Lockout | Select temperature setpoint limits . (Only available when screen lockout is set to partial .) | 3 degrees 0 to 20 degrees |
41. Max Dehum Setpoint 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 1 to 5 or “OFF” to ignore accumulated run time . |
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 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 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 (Mon, Tue, Wed, Thu, Fri, Sat, Sun) 5/1/1 (weekdays, Saturday and Sunday) 5/2 Weekdays (weekdays and weekends) Non-Prog |
32 . Events Per Day | Number of program 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 active. If the reminder is set to timed, the clock will be reset . | no Yes |
37 . HVAC Service Reminder | The period for displaying the “HVAC Service Reminder” 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 Percent 0 to 100 Percent |
40 . Auto 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) |
Indoor Air Quality System SettingS Tables
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 outdoor temperature sensor was not enabled in the HVAC system settings, HVAC system setting 11, outdoor sensor, 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 | Selects if an air cleaner is installed. (If set to no, no other air cleaning settings will be available .) | no Yes |
Change Air Filter Reminder | The period for displaying the “Change Air Filter” message. | off 1 to 12 months or “Off” to disable |
Humidifier System Settings Table
system setting | Description | factory default setting (bold) and setting range |
Humidifier Installed | Selects if a humidifier is installed. (If set to no, no other 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 | Selects the when the “Change Water Panel” message is 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: Determines the month the “Change Water Panel” message is displayed .
Change Water Panel Reminder set to 2 per Season: Determines the first month the “Change Water Panel” message is displayed . | october November December January February March April May June July August September |
Second Reminder Start Month | Determines the second month the “Change Water Panel” message is displayed . (Only available when Change Water Panel Reminder set to 2 per Season .) | October November December January February March April May June July August September |
Dehumidifier System Settings Table
system setting | Description | factory default setting (bold) and setting range |
Dehumidifier Control | Selects method of dehumidification.(If set to none, no 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 . | No yes |
Dehumidifier Forces Fan | Select if dehumidification can turn on the fan . | No yes |
Dehumidifier Service Reminder | The period for displaying the “Dehum Service Reminder” message. | off 1 to 12 months or “Off” to disable |
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) |
Ventilation System Settings Table
system setting | Description | factory default setting (bold) and setting range |
Fresh Air Vent Installed | Selects if ventilation is installed . (If set to no, no other ventilation settings will be available.) | no Yes |
Fresh Air Forces Fan | Selects if ventilation forces the fan on . | No yes |
Fresh Air Setup | Selects if ventilation is configured through the ASHRAE setup or Timed. If ASHRAE setup is selected, the hourly ventilation time will be calculated using the ASHRAE recommendations . If Timed set-up is selected, the hourly ventilation time will be 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 0 to 60 MIN/HR |
High Limit Outdoor Temp | Selects if ventilation is disabled if the outdoor temperature exceeds the outdoor high limit. (Only available if fresh air setup 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 exceeds the outdoor low limit. (Only available if fresh air setup 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 | Selects if ventilation is disabled if the indoor RH exceeds 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% |
Number of Bedrooms | Selects the number of bedrooms to be used for the ASHRAE calculation . (Only available if fresh air setup is set to ASHRAE .) | 3 bedrooms 1 to 6 Bedrooms |
Number of Occupants | 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.
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.
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] to exit.
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
Each equipment test will begin with the selection of turning on the output or stage as shown below.
While the equipment test is active the corresponding test information will be shown.
Press [NEXT] to accept the selection and proceed to the next test selection.
System test TABLES
Heat / Cool Heating equipment Test | ||||||||
Heat Type | W | W2 | W3 | y | y2 | y3 | g | |
Gas | 1st Stage Test | ON | ||||||
Gas | 2nd Stage Test | ON | ON | |||||
Gas | 3rd Stage Test | ON | ON | ON | ||||
Electric | 1st Stage Test | ON | ON | |||||
Electric | 2nd Stage Test | ON | ON | ON | ||||
Electric | 3rd Stage Test | ON | ON | ON | ON |
Heat Pump Heating equipment Test (electric Heat) | |||||||||
Compressor stages | aux stages | W | W2 | b | y | y2 | o | g | |
1 | 1 | 1st Stage Test | ON | ON | ON | ||||
1 | 1 | 2nd Stage Test | ON | ON | ON | ON | |||
2 | 1 | 1st Stage Test | ON | ON | ON | ||||
2 | 1 | 2nd Stage Test | ON | ON | ON | ON | |||
2 | 1 | 3rd Stage Test | ON | ON | ON | ON | ON | ||
1 | 2 | 1st Stage Test | ON | ON | ON | ||||
1 | 2 | 2nd Stage Test | ON | ON | ON | ON | |||
1 | 2 | 3rd Stage Test | ON | ON | ON | ON | ON | ||
2 | 2 | 1st Stage Test | ON | ON | ON | ||||
2 | 2 | 2nd Stage Test | ON | ON | ON | ON | |||
2 | 2 | 3rd Stage Test | ON | ON | ON | ON | ON | ||
2 | 2 | 4th Stage Test | ON | ON | ON | ON | ON | ON |
Heat Pump Heating equipment Test (gas Heat) | |||||||||
Compressor stages | aux stages | W | W2 | b | y | y2 | o | g | |
1 | 1 | 1st Stage Test | ON | ON | ON | ||||
1 | 1 | 2nd Stage Test | ON | ON | |||||
2 | 1 | 1st Stage Test | ON | ON | ON | ||||
2 | 1 | 2nd Stage Test | ON | ON | ON | ON | |||
2 | 1 | 3rd Stage Test | ON | ON | |||||
1 | 2 | 1st Stage Test | ON | ON | ON | ||||
1 | 2 | 2nd Stage Test | ON | ON | |||||
1 | 2 | 3rd Stage Test | ON | ON | ON | ||||
2 | 2 | 1st Stage Test | ON | ON | ON | ||||
2 | 2 | 2nd Stage Test | ON | ON | ON | ON | |||
2 | 2 | 3rd Stage Test | ON | ON | |||||
2 | 2 | 4th Stage Test | ON | ON | ON |
Heat / Cool Cooling Equipment Test
W | W2 | W3 | y | y2 | y3 | g | |
1st Stage Test | ON | ON | |||||
2nd Stage Test | ON | ON | ON | ||||
3rd Stage Test | ON | ON | ON | ON |
Heat Pump Cooling Equipment Test
W | W2 | b | y | y2 | o | g | |
1st Stage Test | ON | ON | ON | ||||
2nd Stage Test | ON | ON | ON | ON |
fan equipment Test | ||||||
W | W2 | W3/b | y | y2 | y3/o | g |
ON |
Humidification equipment Test | ||||
HuM | DHno/DHCoM | VenT | eaC | g |
ON | ON |
Dehumidification equipment Test | ||||
HuM | DHno/DHCoM | VenT | eaC | g |
ON | ON |
Ventilation equipment Test | ||||
HuM | DHno/DHCoM | VenT | eaC | g |
ON | ON |
Ventilation equipment Test | ||||
HuM | DHno/DHCoM | VenT | eaC | g |
ON | ON |
Home Screen
NOTE: BACKLIGHT IS ACTIVATED WITH FIRST BUTTON PRESS AND AUTOMATICALLY TURNS OFF
MAIN MENU
Equipment Control Module LEDs
Display is blank
If Power LED not illuminated at the equipment control module check the following.
The heating system does not respond (“HEATING” appears on the screen)
The cooling system does not respond (“COOLING” appears on the screen)
Fan does not turn on in a call for heat
Heat pump issues cool air in heat mode, or warm air in cool mode
Heat/cool both on at same time
Heating equipment is running in cool mode
“HEATING” is not displayed
“COOLING” is not displayed
Error Codes
error code | Message | error Description |
01 | “SENSOR ERROR” | Open temperature sensor circuit |
02 | Shorted temperature sensor circuit | |
03 | “EEPROM ERROR” | Error in permanent memory |
05 | “LOST SySTEM CONNECTION” | Thermostat lost connection to equipment interface module |
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) |
electrical | |
Operating voltage | 24VAC (18 – 30VAC) |
Current | Maximum: 2.5A (total), 1.0A (single output) Maximum surge current: 5A |
Battery back-up | AA size alkaline battery x 2 |
Control | |
Outdoor, Remote, Leaving and Return temperature sensor | Maximum distance: 300 feet |
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 . |
© 2011 Aprilaire – A division of Research Products Corporation
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