ISU#: 120

Scheduling Options

0 = Non-Programmable

2 = 5-2 Programmable

3 = 5-1-1 Programmable

4 = 7-Day Programmable

ISU#: 125

Temperature Indication Scale

0 = Fahrenheit

1 = Celsius

ISU#: 130

Outdoor Sensor (TH6320U / TH6220U only)

0 = None

1 = Wired Outdoor Sensor

ISU#: 200

Heating System Type

1 = Conventional Forced Air Heat

2 = Heat Pump

3 = Radiant Heat

5 = None (Cool Only)

ISU#: 205

Heating Equipment Type

Conventional Forced Air Heat:

1 = Standard Efficiency Gas Forced Air

2 = High Efficiency Gas Forced Air

3 = Oil Forced Air

4 = Electric Forced Air

5 = Hot Water Fan Coil

Heat Pump:

7 = Air to Air Heat Pump

8 = Geothermal Heat Pump

Radiant Heat:

9 = Hot Water Radiant Heat

12 = Steam

ISU#: 218

Reversing Valve O/B

0 = O (O/B in Cool)

1 = B (O/B in Heat)

ISU#: 220

Cool Stages / Compressor Stages 200=Conv / 200=HP

0, 1, 2

Note: Only 1 compressor stage available on TH6210U model. Only 1 compressor stage available on TH6220U model if configured for heat pump.

ISU#: 221

Heat Stages / Backup Heat Stages

Heat Stages: 1, 2

Backup Heat Stages: 0, 1

ISU#: 230

Fan Control in Heat

1 = Equipment Controls Fan

2 = Thermostat Controls Fan

ISU#: 253

Aux/E terminal control (Fixed to “0” setting on all models except TH6320U)

0 = Drive both Aux & E together

1 = Aux and E independent

ISU#: 255

Backup Heat Source (Heat Pump Only) (TH6320U / TH6220U only)

1 = Electric Forced Air

2 = Gas/Oil Forced Air (or Fossil Forced Air)

ISU#: 256

Emergency Heat Source (TH6320U only)

1 = Electric Forced Air

2 = Gas/Oil Forced Air (or Fossil Forced Air)

ISU#: 260

External Fossil Fuel Kit (TH6320U / TH6220U only)

0 = Thermostat Controls Backup Heat

1 = External Fossil Fuel Kit Controls Backup Heat

ISU#: 300

System Changeover

0 = Manual

1 = Automatic

ISU#: 303

Auto Changeover Differential

0 °F to 5 °F

0.0 °C to 2.5 °C

Note: Differential is NOT deadband. Resideo uses an advanced algorithm that fixes deadband at 0 °F. The differential setting is the minimum number of degrees from set-point needed to switch from the last mode running (heat or cool) to the opposite mode when the thermostat is in auto-changeover. This is more advanced than previous thermostats.

ISU#: 340

Backup Heat Droop

0 = Comfort

2 = 2 °F

3 = 3 °F

4 = 4 °F

5 = 5 °F

6 = 6 °F

7 = 7 °F

8 = 8 °F

9 = 9 °F

10 = 10 °F

11 = 11 °F

12 = 12 °F

13 = 13 °F

14 = 14 °F

15 = 15 °F

Note: 0 (comfort) setting only available if backup heat (ISU 255) is set to Electric.

ISU#: 350

Upstage Timer for Backup Heat

0 = Off

1 = 30 minutes

2 = 45 minutes

3 = 60 minutes

4 = 75 minutes

5 = 90 minutes

6 = 2 hours

7 = 3 hours

8 = 4 hours

9 = 5 hours

10 = 6 hours

11 = 8 hours

12 = 10 hours

13 = 12 hours

14 = 14 hours

16 = 16 hours

ISU#: 355

Compressor Lockout / Balance Point

-- = Off

5 °F to 60 °F (in 5 °F increments)

-15.0 °C to 15.5 °C (in 2.5 °C or 3.0 °C increments)

Note: Use a wired sensor to set compressor lockout / balance point on TH6320U / TH6220U.

ISU#: 356

Outdoor Lockout Backup Heat

-- = Off

5 °F to 65 °F (in 5 °F increments)

-15.0 °C to 18.5 °C (in 2.5 °C or 3.0 °C increments)

ISU#: 365

Compressor Cycle Rate (Stage 1)

1 - 6

ISU#: 366

Compressor Cycle Rate (Stage 2)

1 - 6

ISU#: 370

Heating Cycle Rate (Stage 1)

1 - 12

ISU#: 371

Heating Cycle Rate (Stage 2)

1 - 12

ISU#: 375

Heating Cycle Rate Auxiliary Heat

1 - 12

ISU#: 378

Heating Cycle Rate Emergency Heat (TH6320U only)

1 - 12

ISU#: 387

Compressor Protection

0 = Off

1 - 5 minutes

ISU#: 425

Adaptive Intelligent Recovery

0 = No

1 = Yes

Note: Adaptive Intelligent Recovery (AIR) is a comfort setting. Heating or cooling equipment will turn on earlier, ensuring the indoor temperature will match the setpoint at the scheduled time.

ISU#: 430

Minimum Cool Setpoint

50 °F to 99 °F (50 °F)

10.0 °C to 37.0 °C (10.0 °C)

ISU#: 431

Maximum Heat Setpoint

40 °F to 90 °F (90 °F)

4.5 °C to 32.0 °C (32.0 °C)

ISU#: 435

Keypad Lockout

Series 0-6 (setting on original T6 models):

0 = None

1 = Partial

2 = Full Series

7 (setting current T6 models):

0 = Disabled

1 = Enabled

Note: This feature has been changed in response to customer feedback. On Series 0-6 thermostats, you can lock out the thermostat from the ISU, the same as you can from menu Lockout. For Series 7 or later, this setting allows the contractor to enable or disable the Lockout feature. When disabled, there is no Lockout option under Menu.

ISU#: 500

Is Indoor Temperature Sensor WIRED to your system? (TH6320U / TH6220U only)

0 = No

1 = Yes

ISU#: 515

Indoor Sensor type (TH6320U/TH6220U only)

0 = 10k

1 = 20k

ISU#: 520

Which Sensors will be used for TEMPERATURE Control? (Multiple Sensors are Averaged) (TH6320U / TH6220U only)

1 = Thermostat Only

2 = Wired Only

3 = Average

ISU#: 702

Number of Air Filters

0 - 2

ISU#: 711

Air Filter 1 Replacement Reminder

0 = Off

1 = 10 Run Time Days

2 = 20 Run Time Days

3 = 30 Run Time Days

4 = 45 Run Time Days

5 = 60 Run Time Days

6 = 90 Run Time Days

7 = 120 Run Time Days

8 = 150 Run Time Days

9 = 30 Calendar Days

10 = 45 Calendar Days

11 = 60 Calendar Days

12 = 75 Calendar Days

13 = 3 Calendar Months

14 = 4 Calendar Months

15 = 5 Calendar Months

16 = 6 Calendar Months

17 = 9 Calendar Months

18 = 12 Calendar Months

19 = 15 Calendar Months

ISU#: 712

Air Filter 2 Replacement Reminder

0 = Off

1 = 10 Run Time Days

2 = 20 Run Time Days

3 = 30 Run Time Days

4 = 45 Run Time Days

5 = 60 Run Time Days

6 = 90 Run Time Days

7 = 120 Run Time Days

8 = 150 Run Time Days

9 = 30 Calendar Days

10 = 45 Calendar Days

11 = 60 Calendar Days

12 = 75 Calendar Days

13 = 3 Calendar Months

14 = 4 Calendar Months

15 = 5 Calendar Months

16 = 6 Calendar Months

17 = 9 Calendar Months

18 = 12 Calendar Months

19 = 15 Calendar Months

ISU#: 1400

Backlighting

0 = On Demand

1 = Continuous

Note: Common wire needed for continuous.

ISU#: 1401

Backlighting Brightness

1 - 5

Note: Only displayed if continuous backlight selected.

ISU#: 1410

Clock Format

12 / 24

ISU#: 1415

Daylight Saving Time

0 = Off

1 = On

ISU#: 1420

Temperature Display Offset

-3 to 3F (0)

-1.5 to 1.5C (0)