Setting The Deadband Temperature Difference; Setting The Temperature Offset; Setting The Balance Point For A Heat Pump System - AMX ENV-VST-C Instruction Manual

12. Use the navigation buttons to highlight Second Stage Diff, and press Mode/Select.
13. Press Mode/Select to indicate the second stage differential.

Setting the Deadband Temperature Difference

The Deadband is the temperature difference between the heating and cooling setpoints. The Deadband configuration enforces a
minimum separation between the two setpoints which determine when auto changeover between HVAC heating and cooling mode
will occur.
Perform these steps to set the deadband temperature difference:
1. From the Main screen, press Mode/Select to access the Thermostat Mode screen.
2. Use the navigation buttons to select Settings, and press Mode/Select. The Settings screen appears.
3. Use the navigation buttons to select Advanced Settings. Press Mode/Select to access the Security Code screen.
4. Enter the security code, and select Enter to access the User Preferences screen. See the Entering the Security Code on
page 30 for more information.
5. Use the navigation buttons to highlight More, and press Mode/Select to access the second User Preferences screen.
6. On the second User Preferences screen, use the navigation buttons to highlight More, and press Mode/Select to access the
third User Preferences screen.
7. Use the navigation buttons to highlight Advanced Setup, and press Mode/Select to access the Advanced Setup screen.
8. Use the navigation buttons to highlight More, and press Mode/Select to access the second Advanced Setup screen.
9. Use the navigation buttons to highlight Thermostat Setup, and press Mode/Select to access the Thermostat Setup screen
(FIG. 48).
10. Use the navigation buttons to highlight Deadband, and press Mode/Select.
11. Press Mode/Select to indicate the deadband temperature difference.

Setting the Temperature Offset

The temperature offset enables you to customize the temperature shown on the display. You can set the temperature offset
between 10 and -10 in 1° increments. Selecting a positive increment decreases the displayed value, while selecting a negative
increment increases it.
Perform these steps to set the temperature offset:
1. From the Main screen, press Mode/Select to access the Thermostat Mode screen.
2. Use the navigation buttons to select Settings, and press Mode/Select. The Settings screen appears.
3. Use the navigation buttons to select Advanced Settings. Press Mode/Select to access the Security Code screen.
4. Enter the security code, and select Enter to access the User Preferences screen. See the Entering the Security Code on
page 30 for more information.
5. Use the navigation buttons to highlight More, and press Mode/Select to access the second User Preferences screen.
6. On the second User Preferences screen, use the navigation buttons to highlight More, and press Mode/Select to access the
third User Preferences screen.
7. Use the navigation buttons to highlight Advanced Setup, and press Mode/Select to access the Advanced Setup screen.
8. Use the navigation buttons to highlight More, and press Mode/Select to access the second Advanced Setup screen.
9. Use the navigation buttons to highlight Thermostat Setup, and press Mode/Select to access the Thermostat Setup screen
(FIG. 48).
10. Use the navigation buttons to highlight Temperature Offset, and press Mode/Select.
11. Press Mode/Select to indicate the temperature offset.

Setting the Balance Point for a Heat Pump System

Balance Point configuration enables you to adjust a balance point to limit auxiliary heat pump operation according to the current
outdoor temperature. The balance point establishes the outdoor temperature at which time the heat pump turns off and remains off
until the outdoor temperature exceeds the balance point again. For example, if the balance point is set to 25 degrees and the
outdoor temperature is 25 degrees or less, the heat pump remains off until the temperature exceeds 25 degrees again. The
compressor terminals will not be energized when the outdoor temperature is below the balance point.
This does not affect Emergency Heat operation.

This option is only valid if the thermostat has been configured to operate as a heat pump.

Perform these steps to set the balance point:
1. From the Main screen, press Mode/Select to access the Thermostat Mode screen.
2. Use the navigation buttons to select Settings, and press Mode/Select. The Settings screen appears.
3. Use the navigation buttons to select Advanced Settings. Press Mode/Select to access the Security Code screen.
4. Enter the security code, and select Enter to access the User Preferences screen. See the Entering the Security Code on
page 30 for more information.
5. Use the navigation buttons to highlight More, and press Mode/Select to access the second User Preferences screen.
6. On the second User Preferences screen, use the navigation buttons to highlight More, and press Mode/Select to access the
third User Preferences screen.
ENV-VST-C - Instruction Manual
Advanced Thermostat Operations
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