Servo drive ESBE ARA

Product detailed description

The ESBE ARA servo drive is commonly used in heating, ventilation, and sanitary systems where precise control of mixing valves is required. It is installed in residential, commercial, and industrial buildings to regulate flow in three- or four-way mixing systems. Installers typically integrate it into central heating circuits, domestic hot water systems, and underfloor heating applications. The device ensures accurate positioning of the valve to maintain desired temperature and flow conditions.

Its compact design and low weight make it suitable for tight spaces and retrofitting. The IP41 rating ensures protection against dust and dripping water, making it suitable for indoor environments. The operating temperature limit of +55°C must be considered when selecting installation locations to avoid overheating.

Technical parameters

Cable length	1.5 m
Protection rating	IP 41
Ambient temperature	max +55°C
Weight	0.4 kg
Code	12100200
Brand	ESBE

The cable length of 1.5 m provides flexibility in positioning the drive relative to the control unit. The IP41 rating means it is not suitable for outdoor or high-moisture environments. The maximum ambient temperature of +55°C is a critical factor in determining the suitability of the drive for specific applications, especially in boiler rooms or near heat sources.

Installation and connection

The ARA servo drive is mounted directly onto the valve stem using a standard coupling. The installation requires a clean, dry surface and secure fastening to prevent vibration-induced misalignment. The 1.5 m cable should be routed away from heat sources and sharp edges to prevent damage. Installers must verify that the valve is fully compatible with the selected ARA variant and that the drive is correctly aligned with the valve stem before tightening the coupling. A common mistake is failing to engage the manual override fully after installation, which can lead to operational issues during commissioning.

Compatibility and accessories

The ARA drive is compatible with three-way (VRG 131) and four-way (VRG 141) mixing valves from ESBE. It supports 24V or 230V control signals and is available in variants with different stroke times and control types (3-point or 0–10V). When ordering, ensure that the selected drive matches the valve type, control system, and power supply. Additional components such as control panels or sensors may be required for full system integration, depending on the application.

Technical background for designers

The ARA drive operates using an electric motor that rotates the valve stem through a 90° arc. The drive is constructed from durable materials to withstand the mechanical stress of repeated actuation. The torque of 6 Nm is sufficient for most mixing valves in the specified DN range. The control input (24V, 230V, or 0–10V) determines how the drive responds to signals from a thermostat or building management system. The IP41 rating and temperature limit are important for ensuring long-term reliability in the intended operating environment.

Service and operation

The ARA drive requires minimal maintenance due to its sealed design. However, regular visual inspections should be carried out to check for signs of mechanical wear or cable damage. The manual override function should be tested periodically to ensure it operates smoothly. No specific service intervals are provided in the technical documentation, but any unusual noise or failure to respond to control signals should be investigated immediately.

Frequently asked questions

Can the ARA drive be used with a 0–10V control signal?
Yes, certain variants such as ARA 639 and ARA 659 support 0–10V control in addition to 24V operation.

Is the ARA drive compatible with three-way and four-way valves?
Yes, it is specifically designed for use with three-way (VRG 131) and four-way (VRG 141) mixing valves.

Can the drive be operated manually?
Yes, a pull-out button on the front allows for manual operation of the valve in case of power failure or maintenance.

What is the maximum ambient temperature for the ARA drive?
The maximum ambient temperature is +55°C, beyond which the drive may not function correctly.

Documents for download

• ARA_pohony_11.pdf - User Manual