Description
Introduction
The ABB Caldion CAR/U4.2.1.1-84 (Product ID: 2TAZ741010R0001) is a flush-mounted room temperature controller designed for room climate control applications within KNX building automation networks. Engineered for BS standard mounting, this white unit features a frameless design with a large display and dedicated capacitive touch RTC buttons for intuitive operational control. This device is part of our KNX panel range.
Configurable for standalone operation or as a KNX device via its integrated bus coupling unit, the controller manages fan coil units with 2-pipe, 2-pipe with electric heater, or 4-pipe systems. Technical specifications and project procurement verification can be confirmed using official ABB document numbers 9AKK107492A7728 for technical data and 9AKK107492A7829 for manuals.
Key Features
- Model SKU CAR/U4.2.1.1-84 with ABB Product ID 2TAZ741010R0001 and EAN 6941195435045.
- Designed for 2-pipe, 2-pipe with electric heater, and 4-pipe fan coil climate control.
- Integrated actuator outputs for on/off or 0-10V valve control plus 3-speed fan control.
- Built-in internal room temperature sensor.
- Two binary inputs for window position, dewpoint monitoring, or condensate alarm functions.
- BS standard flush-mounted (FM) construction in White finish.
- Frameless design featuring capacitive touch RTC buttons and a large display.
- ETIM 8 and ETIM 9 classification EC001101 (Room temperature controller for bus system).
Benefits
- Supports multiple HVAC fan coil system types, including 2-pipe, 2-pipe with electric heater, and 4-pipe configurations.
- Features a frameless white body with a large display and capacitive touch buttons for intuitive climate adjustments.
- Includes a built-in temperature sensor and output control for either 0-10V or on/off valve actuators.
- Provides flexible implementation as a standalone unit or connected directly to KNX via an integrated bus coupling unit.
- Offers 3-speed fan control alongside 2 binary inputs for status alarms such as window position, dewpoint, or condensate level.
- Fits standard BS flush-mounted installations to match modern room architecture specifications.
Technical Specifications
Applications
- Room climate control for fan coil unit systems in commercial buildings, hotels, and residential KNX projects.
- HVAC regulation requiring 0-10V or on/off valve outputs across 2-pipe or 4-pipe system setups.
- Auxiliary status monitoring for window positions, dewpoint conditions, or condensate alarms via binary inputs.
Installation Notes
- Mount the device in a BS standard flush-mounting enclosure according to installation instructions 9AKK107492A7829.
- Verify proper connection of 0-10V or on/off valve outputs, 3-stage fan wiring, and binary input lines before powering the unit.
- Integrate into KNX bus topology using the integrated bus coupling unit or set up for standalone operation as required by project specifications.
- Cross-check exact model number CAR/U4.2.1.1-84 and Product ID 2TAZ741010R0001 against project BOQ to ensure correct procurement.
Developer Resources
- Technical Data Sheet: Document 9AKK107492A7728
- Installation Instructions and Manuals: Document 9AKK107492A7829
- Declaration of Conformity – CE: Document 9AKK107680A0356
- Official Manufacturer Product Page: https://new.abb.com/products/en/2TAZ741010R0001/car-u4-2-1-1-84
FAQ
Which fan coil configurations are compatible with the ABB CAR/U4.2.1.1-84?
The CAR/U4.2.1.1-84 supports 2-pipe, 2-pipe with electric heater, and 4-pipe fan coil unit configurations. Explore more ABB building automation products for professional building automation projects.
What type of valve outputs does this controller support?
It provides integrated actuator outputs capable of controlling either on/off or 0-10V valves, along with 3 fan speed control outputs. For certificates and current technical files, refer to the manufacturer technical documentation.
Does this controller require a separate bus coupling unit for KNX integration?
No, the CAR/U4.2.1.1-84 features an integrated bus coupling unit for direct KNX deployment, and can also run in standalone mode.
What function do the binary inputs serve?
The 2 binary inputs can be used to monitor external signals such as window status, dewpoint detection, or condensate alarms.
How can system integrators ensure correct product verification during procurement?
Verify the exact Product ID 2TAZ741010R0001, EAN 6941195435045, and technical data sheet 9AKK107492A7728 against your project BOQ.
What is the exact product model?
The order/model code for this page is CAR/U4.2.1.1-84. Match it against project documents before purchase.
Conclusion
The ABB Caldion CAR/U4.2.1.1-84 (Product ID: 2TAZ741010R0001) delivers structured climate control for 2/4 pipe fan coil systems within KNX networks or standalone setups. With its white frameless display, built-in temperature sensor, binary inputs, and 0-10V/on-off valve options, it meets strict commercial HVAC specifications. Installers and system integrators can review our KNX dealer program options.
To prevent procurement mismatches and avoid incorrect orders, verify your technical specification against official ABB manual 9AKK107492A7829 and data sheet 9AKK107492A7728.
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