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Aprilaire 8840 - Thermostat System Settings Table

Aprilaire 8840
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12 13
SETUP & TESTING
Thermostat System Settings Table
System setting Description
Factory default setting
(bold) and setting range
Equipment Type Note: Equipment Type related settings will return to
defaults if this is changed.
Heat/Cool
Heat Pump
Control Setup Used to lockout heating or cooling outputs. (Heat/Cool
mode only.)
Heat & Cool
Heat Only
Cool Only
Heat Pump Auxiliary Type Selects auxiliary type. (Heat Pump mode only.) Gas/Oil Heat
Electric Heat
Fan Control In Heating Selects thermostat or equipment to control the fan in
heating. (Heat/Cool mode only.)
Gas/Oil Heat
Electric Heat
Number of Compressor Stages Select number of compressor stages. (Heat Pump mode
only.)
One
Two
Number of Auxiliary Heat Stages Select number of auxiliary heat stages. (Heat Pump
mode only.)
One
Two
Number of Stages of Heat Select number of heat stages. (Heat/Cool mode only.) One
Two
Three
Number of Stages of Cool Select number of cool stages. (Heat/Cool mode only.) One
Two
Three
Remote Temperature Sensor
Installed?
Select if the remote sensor is attached, and uses backup,
or is averaged with built-in.
No
Yes
Yes (fallback built-in)
Yes (average w/built-in)
Return Air Temperature Sensor
Installed?
Select if return air temperature sensor is attached or not. No
Yes
Outdoor Temperature Sensor
Installed?
Select if outdoor sensor is attached or not. No
Yes
Automation
Display Support Modules Select if support module values are displayed on
Monitored Climate screen under Status.
No
Yes
Number of Controlling Support
Modules Temp
Select number of sensors configured to be controlling
temperature.
0-8
Number of Controlling Support
Modules RH
Select number of sensors configured to be controlling
RH.
0-4
Schedule Enables or disables programmable schedule. Enabled
Disabled
Progressive Recovery Enables or disables progressive recovery. Enabled
Disabled
Display Away Button? Away allows the user to set the thermostat to a
predefined setpoint using a single button press.
The predefined setpoints can be selected in the User
Settings.
No
Yes
Display Heat Blast Button? Select if the Heat Blast button is displayed. No
Yes
Blast Offset Amount of heating when Heat Blast is initiated.
3°F (1.5°C)
4°F (2°C)
5°F (2.5°C)
HVAC INSTALLER SYSTEM SETTINGS TABLES (CONTINUED)
Thermostat System Settings Table (continued)
System setting Description
Factory default setting
(bold) and setting range
Extended Fan – Heat Extends fan operation after heat call ends. Disabled
Enabled
Extended Fan – Cool Extends fan operation after cool call ends. Disabled
Enabled
Auto Changeover Enable or disable Auto Changeover mode. Disabled
Enabled
DeadBand Auto Changeover mode deadband.
3°F (1.5°C)
2 to 9°F (1 to 4.5°C)
Auto Changeover Time Minimum time between heating and cooling calls.
4 Minutes
1 to 5 Minutes
Internal Temperature Sensor
Offset
Field adjustment of controlling temperature sensors.
0°F (0°C)
-4 to 4°F (-2 to +2°C)
Internal RH% Sensor Offset Field adjustment of internal RH sensor.
0
-5 to 5
Equipment Minimum On Time Minimum on time for heating and cooling.
2 Minutes
1 to 5 Minutes
Heating Minimum Off Time Minimum off time for heating.
2 Minutes
1 to 5 Minutes
Compressor Minimum Off Time Minimum off time for compressor protection.
5 Minutes
1 to 5 Minutes
Outdoor Temperature High
Balance Point
Enable or disable high balance point (Available if ODT
is installed.)
Enabled
Disabled
Select High Temperature Balance
Point
If outside temperature is above the high balance point
the aux heat operation is not allowed. (Available if high
balance point is enabled.)
65°F (14.5°C)
0 to 80°F (-18 to 22°C)
Outdoor Temperature Low
Balance Point
Enable or disable low balance point (Available if ODT is
installed.)
Enabled
Disabled
Select Low Temperature Balance
Point
If outside temperature is below the low balance point
the compressor operation is not allowed. (Available if
low balance point is enabled.)
20°F (-8°C)
0 to 60°F (-18 to 12°C)
Stage Rate Accumulation of equipment run time in staging
determination.
Enabled
Disabled
Factor 1 = more rapid staging of equipment (comfort),
5 = slower staging of equipment (economy).
2
1 to 5
First Stage Differential First stage differential.
1°F (0.5°C)
1 to 9°F (0.5 to 4.5°C)
Second Stage Differential Second stage differential.
1°F (0.5°C)
1 to 9°F (0.5 to 4.5°C)
Third Stage Differential Third stage differential.
1°F (0.5°C)
1 to 9°F (0.5 to 4.5°C)
Fourth Stage Differential Fourth stage differential.
1°F (0.5°C)
1 to 9°F (0.5 to 4.5°C)
Service HVAC Reminder The period for displaying the “HVAC Service reminder”
message.
Disabled
Enabled
Number of Months for Recurrence Select number of months for displaying reminder.
12 Months
1 to 12 Months
SETUP & TESTING
HVAC INSTALLER SYSTEM SETTINGS TABLES (CONTINUED)

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