AMX ENV-VST-C manual Setting First and Second Stage Differentials

Page 54

Advanced Thermostat Operations

Setting First and Second Stage Differentials

Differentials set the tightness of the temperature control to eliminate large temperature swings and prevent the HVAC system from operating too often. Normally the second stage of heat is for auxiliary or emergency heat.

Perform these steps to set the first and second stage differentials:

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. 49).

FIG. 49 Thermostat Setup screen (1 of 2)

10.With First Stage Diff highlighted, press Mode/Select to activate it.

11.Press Mode/Select to indicate the first stage differential.

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.

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ENV-VST-C - Operation / Reference Guide

Page 53 Page 55
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Page 53 Page 55
Contents ENV-VST-C AMX Limited Warranty and Disclaimer Table of Contents Advanced Thermostat Operations Programming AxLink Channels AxLink Levels Weather Duet Module ViewStat Color Thermostat Specifications OverviewSystem Components ENV-VST-TSO Outdoor Temperature Sensor Specifications Communication and HvacSelecting the Thermostat Location Disconnecting Power to All Hvac EquipmentRemote Temperature Sensors Stand-Alone Thermostat Mounting CriteriaWiring the Thermostat Removing the Faceplate from the BaseMounting the Base to a Wall Wiring Terminals Communication and Equipment Terminal Wiring DefinitionsCommunication and Equipment Terminal Wiring Definitions Preparing Captive Wires Wiring GuidelinesWiring for AxLink Wiring Diagrams Single Stage Furnace and Single Stage A/CDual Stage Furnace and Dual Stage A/C wiring Dual Stage Furnace and Dual Stage A/CRoof Top Unit with Dual Stage Heat and Dual Stage Cool Boiler and A/C with Separate Transformers wiring Boiler and A/C with Separate TransformersSingle Stage Heat Pump wiring Single Stage Heat PumpTwo Stage Heat Pump wiring Two Stage Heat PumpInstallation and Wiring Installing a Remote Sensor Installing the Outdoor Temperature SensorInstalling the Indoor Flush Mount Sensor Indoor Flush Mount Temperature Sensor SpecificationsSensor wire connected to cable Front Panel Components Navigating the ViewStat Color Communicating ThermostatChanging the Heating and Cooling Setpoints Main Screen Status IconsHold Mode Options Changing Hold ModeChanging the Heating/Cooling Mode To ProgramTurning Off the Hvac System Changing the Fan ModeHeating/Cooling Mode Options Stops blinkingFan Auto Fan Mode OptionsHelp Screen Or coolingCurrent Weather Screen Day Forecast ScreenThermostat Mode Screen Thermostat Mode Screen OptionsExit Returns to the Main screen Establishing Daytime/Nighttime Temperature Settings Program ScreenProgram Screen Options Copying Programmed Settings Copy To screenAway Mode Screen Establishing Away Mode SettingsAway Mode Screen Options Settings Screen Changing the Fan SettingsSettings Screen Options Changing the Filter Settings Accessing Advanced Setup Options Changing User PreferencesSecurity Code Screen Entering the Security Code Change Security Code ScreenChanging the Security Code User Preferences Screen User Preferences Screen OptionsChanging the Temperature Scale Changing the Date and Time FormatChanging the Backlight Settings Disabling the Filter Change ReminderDisabling the Weather Alert Icon Disabling the Forecast ScreensDisabling the Screen Saver Button Lockout Screen Button Lockout Screen OptionsLocking the Temperature Settings Locking the ButtonsLocking the Fan Settings Locking the Mode SettingsAdvanced Setup Screen Advanced Setup Screen OptionsWhen Diagnostic Mode is active Changing the Type of Hvac SystemChanging the Type of Fossil Fuel Activating the External SensorSetting the Date and Time on the Thermostat Activating the Internal On-board SensorActivating the On-board Humidity Sensor Turning on Diagnostic Mode Advanced Setup screen 2Turning on Comfort Recovery Turning on the Humidification and Dehumidification SystemsAxLink Communications Screen AxLink Communications screenSwitching AxLink Devices Thermostat Setup Thermostat Setup ScreenThermostat Setup Screen Options Setting First and Second Stage Differentials Setting the Deadband Temperature DifferenceSetting the Temperature Offset Setting the Balance Point for a Heat Pump SystemThermostat Setup screen 2 SENDCOMMANDs SENDCOMMANDsDay Forecast Commands Color ViewStat Thermostat CommandsDay Forecast Commands Weather Condition KeywordsAxLink Commands AxLink CommandsDew Point 55F Temperature scaleDisplays the current forecast To Off, the response reports OFFSendcommand ’LK MR1 TR3’ Sets the mode to Program Master requesting the thermostat’s serial number Sets the current barometric pressureRequest the thermostat’s serial number Thermostat returns the serial numberAxLink Channels AxLink ChannelsHeat 224 219Hvac State Emergency 2nd stage heat relay Provides feedback from relay W2 246AxLink Levels Weather Duet ModuleAxLink Levels Weather Setup Pages InConcert windowChanging the Date and Time Weather MainChanging the Humidity Settings Changing the Humidity ModeChanging the Heat and Cool Settings Humidity menuChanging the Hvac Mode Hvac Mode menuChanging the Hold Mode Entering Location by Zip CodeChanging Wind Speed Units Changing Temperature UnitsEntering Location by Station ID Changing Pressure UnitsDay Forecast screen Programming ENV-VST-C Operation / Reference Guide Increase Your Revenue through education + knowledge
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ENV-VST-C specifications

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