Description
Introduction
The ABB Caldion® Room Temperature Controller (SKU: CAR/U4.2.1.1-71, Product ID: 2TAZ741010R2001) is a specialized HVAC control solution engineered for fan coil unit (FCU) systems. Designed for flush-mounting in standard British Standard (BS) flush boxes, this black frameless controller features a capacitive touch interface and a large display for intuitive room climate management. Operating either as a standalone device or integrated into a KNX system via its built-in bus coupling unit, it offers flexible deployment options for commercial and residential automation projects. This device is part of our KNX panel products range.
Compatible with 2-pipe, 2-pipe with electric heater, and 4-pipe fan coil configurations, the CAR/U4.2.1.1-71 provides direct control over 0-10V or on/off valves along with 3-speed fan control. Additionally, the unit features an integrated temperature sensor and two binary inputs designed for monitored parameters such as window contacts, dewpoint sensors, and condensate alarms.
Key Features
- Integrated KNX bus coupling unit for direct network connectivity (ETIM class EC001101).
- Built-in temperature sensor for localized room temperature measurement.
- Supports on/off and 0-10V proportional valve actuator control.
- 3 x fan speed output control for multi-stage fan coil regulation.
- 2 x binary inputs dedicated to window status, dewpoint detection, or condensate alarms.
- Frameless design in black finish with capacitive touch interface and high-contrast display.
- BS standard flush-mounted form factor measuring 86 mm height, 86 mm width, and 16 mm depth.
Benefits
- Flexible Architectural Deployment: Operates as a standalone room controller or integrates seamlessly into KNX automation networks using its integrated bus coupling unit.
- Versatile HVAC System Support: Controls 2-pipe, 2-pipe with electric heater, and 4-pipe fan coil systems with precision.
- Integrated Valve & Fan Control: Offers direct outputs for 0-10V or on/off valve actuators alongside 3-step fan speed management.
- Dedicated Binary Monitoring: Features 2 binary inputs specifically suited for window state contacts, dewpoint monitoring, or condensate overflow alarms.
- Modern User Interface: Features a frameless black design with capacitive touch RTC control buttons and a large clear display for operation mode adjustments.
- Standard Flush-Mount Form Factor: Fits standard BS standard flush-mounting boxes with physical dimensions of 86 mm x 86 mm x 16 mm.
Technical Specifications
Applications
- Commercial HVAC Fan Coil Control: Ideal for managing 2-pipe and 4-pipe FCUs in office buildings, hotels, and commercial developments.
- Integrated KNX Room Automation: Suitable for KNX projects requiring individual room temperature control, window monitoring, and condensate alarm detection.
- Standalone Climate Management: Can be deployed without an active KNX bus infrastructure for independent room temperature regulation.
Installation Notes
- Mounting Requirement: Designed for flush-mount installation in British Standard (BS) flush boxes.
- Bus Coupling: Includes an integrated KNX bus coupling unit; ensure correct bus line connection when deploying in KNX mode.
- Sensor & Safety Wiring: Connect external binary contacts (such as window contacts or condensate alarms) to the two dedicated binary input terminals.
- Physical Dimensions: Confirm enclosure cutout suitability for the 86 mm x 86 mm front panel with a 16 mm depth.
Developer Resources
- Official documentation and technical guides for the ABB Caldion CAR/U4.2.1.1-71 include CE Declaration 9AKK107680A0355 and Instructions/Manuals document 9AKK107492A7829. ETIM 7 and ETIM 8 classification is EC001101 (Room temperature controller for bus system). Technical specifications can be verified using Product ID 2TAZ741010R2001.
FAQ
What fan coil unit configurations does the ABB CAR/U4.2.1.1-71 support?
The CAR/U4.2.1.1-71 supports 2-pipe systems, 2-pipe systems with an electric heater, and 4-pipe fan coil systems. Explore more products from ABB for professional building automation projects.
Does the CAR/U4.2.1.1-71 require a separate KNX bus coupler?
No, the device includes an integrated KNX bus coupling unit for direct KNX connectivity. For certificates and current technical files, refer to the official ABB documentation.
What valve types can be controlled by this unit?
The integrated actuator output supports both on/off valves and 0-10V modulating valves.
What function do the binary inputs serve?
The unit provides 2 binary inputs intended for external monitoring devices such as window contacts, dewpoint sensors, or condensate level alarms.
What is the exact product model?
The order/model code for this page is CAR/U4.2.1.1-71. Match it against project documents before purchase.
Who is the manufacturer?
This product is manufactured by ABB.
Conclusion
The ABB Caldion® CAR/U4.2.1.1-71 Room Temperature Controller (2TAZ741010R2001) offers an elegant, high-performance solution for FCU climate control in modern smart buildings. Installers and system integrators can review our become a KNX dealer options.
Featuring 0-10V/on-off valve regulation, 3-speed fan control, dedicated binary inputs, and native KNX integration, it satisfies both functional and aesthetic requirements for demanding commercial and residential HVAC projects.
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