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The Schneider Electric (Viconics) VT8650U5500B Indoor Air Quality controller is an advanced design for HVAC systems in commercial settings. This programmable room controller is designed to work with rooftop units and heat pumps for control of heating, cooling, and ventilation. The part has a customizable color touchscreen interface, BACnet MS/TP communication protocol, and built in sensors for relative humidity, temperature and motion detection. It improves energy efficiency through the use of occupancy based controls and economizer operations to provide better indoor air quality at the lowest operational maintenance. It is compatible with building management systems for centralized monitoring and control.
VT8650U5500B Schneider Electric Progammable Thermostat
The Schneider Electric (Viconics) VT8650U5500B is a programmable and application-specific room controller with customizable screen colors. It's a versatile controller suitable for rooftops, heat pumps, and indoor air quality applications in commercial and high-end hospitality markets. The VT8650U5500B Schneider Electric progammable thermostat offers security features such as a PIR cover to prevent unauthorized access. With permanent program retention, settings remain intact even during power losses. Additional functionalities include mixed-air control outputs (0-10V), mixed-air sensor input for outdoor air quality consideration, and mixed-air setpoint economizer changeover for automatic switching to economizer mode in favorable outdoor conditions.
The thermostat allows customization with two or four configurable events per day, progressive recovery options, and a choice between 12-hour or 24-hour clock formats, maintaining time settings for up to six hours without power. The Occ/Unocc auxiliary contact out provides a signal for controlling other equipment based on occupancy, and BACnet MS/TP support facilitates communication with BACnet building automation systems. For wireless connectivity, an optional Zigbee Pro/Wireless communication module is available, enabling seamless communication with other compatible devices.
Key features:
2H/2C (3H/2C heat pump) Fan switching (on/auto/smart) System switching (O/A/C/H): This allows for flexible control of various HVAC systems.
Backlit LCD touchscreen Display: Provides a clear and easy-to-use interface for programming and monitoring.
Remote and OSA sensors (optional): Enables remote monitoring and control of the HVAC system, as well as optimization based on occupancy and outdoor air quality.
Adjustable deadband: Helps to improve comfort and energy efficiency by reducing the frequency of system cycling.
Signs of a Faulty Schneider Electric Progammable Thermostat
Physical Issues:
Cracked or damaged display: Look for visible cracks, chips, or scratches on the touchscreen.
Unresponsive buttons: The buttons on the controller may not respond to touch or may feel unresponsive.
Loose or damaged wiring: Check for any loose or damaged wires connected to the controller.
Power supply problems: Ensure the controller is plugged in properly and the outlet is functioning.
System and Functionality Issues:
Incorrect temperature readings: The displayed temperature may not match the actual room temperature.
HVAC system not working properly: The heating or cooling system may not turn on or off as expected, even when the desired temperature is set.
Fan malfunction: The fan may not turn on or off properly, or it may run continuously.
Economizer not functioning: The economizer mode may not activate when outdoor conditions are favorable.
Error messages: The controller may display error messages on the screen, indicating specific issues.
Schedule not working: The controller may not follow the programmed schedule for temperature adjustments.
BACnet communication failure: If connected to a BACnet system, communication issues may arise.
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