Changing The Type Of Hvac System - AMX ENV-VST-C Instruction Manual

Advanced Setup Screen Options
HVAC System
Fossil Fuel
External Temp
Sensor
Internal Temp
Sensor
Humidity Sensor
Month
Day
Year
Hour
Minute
Cycle Rate
AxLink Setup
Thermostat Setup
Diagnostic Mode
Humidification
System
Dehumidification
System
Comfort Recovery
Help Mode
Exit

Changing the Type of HVAC System

The thermostat automatically defaults to One Stage Furnace for the HVAC System setting when you install it. You can change the
type of HVAC system you are using, which activates certain features depending on which type of system you have. This option
should be set when the thermostat is installed for the first time, and should not need to be changed after that. Perform the
following steps to change the type of HVAC system you are using:
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
(FIG. 42).
ENV-VST-C - Instruction Manual
Enables you to set the type of HVAC you are using. The thermostat defaults to One Stg Furnace.
For a list of HVAC System types, refer to the Wiring the Thermostat on page 10 of the ViewStat Color
Communicating Thermostat Operation/Reference Guide.
Enables you to indicate the type of fossil fuel your HVAC system uses. You can choose from Electric or Gas.
Enables you to indicate whether the external sensor is located indoors or outdoors. If you activate both this sensor
and the Onboard Temperature sensor, the thermostat reports an average temperature based on the temperature
readings from each sensor. You can also turn off the external sensor with this option.
Enables you to indicate whether you want to turn on or turn off the onboard temperature sensor. If you activate
both this sensor and the External Temperature sensor, the thermostat reports an average temperature based on the
temperature readings from each sensor.
Enables you to indicate whether you want to turn on or turn off the onboard humidity sensor.
Enables you to set the current month. You can enter a value between 1-12.
Enables you to set the current day. You can enter a value between 1-31.
Enables you to set the current year.
Enables you to set the current hour. You can enter a value between 0-23.
Enables you to set the current minute. You can enter a value between 0-59.
Enables you to set the number of times per hour your HVAC system can turn on and off. You can choose from 3, 4,
5, or 6. The default value is 4.
Enables you to access the AxLink Setup screen. See the AxLink Communications Screen on page 42 for more
information.
Enables you to access the Thermostat Setup screen. See the Thermostat Setup Screen on page 43 for more
information.
Enables you to activate a mode during which you can test the functionality of the thermostat. With Diagnostic Mode
turned on, the cycle rate no longer applies and you can enter the Advanced Settings sections without entering a
security code. Text appears on the Main screen notifying you when Diagnostic Mode is active.
Enables you to activate the humidification system to add humidity to the air. You can set the humidify setpoint on
the Program Mode or Away Mode screens.
See the Program Screen section on page 24 and the Away Mode Screen section on page 26 for more information.
Enables you to activate the dehumidification system to remove humidity from the air. You can set the dehumidify
setpoint on the Program Mode or Away Mode screens.
See the Program Screen section on page 24 and the Away Mode Screen section on page 26 for more information.
Enables you to indicate whether the heating/cooling system recovers gradually from an energy-saving setpoint
temperature to a comfort setpoint temperature. By incrementing the setpoints gradually, the heating/cooling
system activates in advance of the actual set program time so the area is at the desired temperature at the start of
the program time.
If this option is disabled, heating/cooling setpoints are changed at the exact start time of the program period.
Enables a help screen that you can access by pressing Mode/Select on the Main screen. See the Help Screen section
on page 22 for more information.
Returns you to the User Preferences screen.
Advanced Thermostat Operations
38