Electric servo drives are essential components in hydronic systems where precise control of mixing valves is required. They are commonly used in residential and commercial heating systems, particularly in boiler applications where temperature regulation is critical. Installers and service technicians often encounter these drives in systems requiring automated flow control for optimal efficiency. The IVAR servo drive is specifically engineered for integration with PAW mixing valves, ensuring accurate and reliable operation in a range of boiler and heating configurations.

In such systems, the drive is responsible for actuating the valve in response to control signals, typically from a thermostat or building management system. The response time and torque are key factors in ensuring the system maintains the desired temperature without overshooting or undershooting. The drive must be correctly sized to match the valve and system requirements to avoid performance issues such as slow response or insufficient actuation force.

Technical parameters

Power supply	230 V
Code	705001
Brand	IVAR

The 230 V ensures compatibility with standard electrical systems in Europe, while the 5 Nm torque is suitable for medium-sized mixing valves. The 90° rotation angle corresponds to the full stroke of the valve, and the 140 s time constant indicates the speed at which the drive reaches its target position. These parameters are crucial for proper sizing and selection, ensuring the drive can respond effectively to control inputs without causing instability in the system.Installation and connection The installation of the IVAR servo drive involves securing it to the mixing valve and connecting the electrical supply. The drive is typically mounted using standard fasteners, and the electrical connections are made via . It is important to verify the voltage rating (230 V) and ensure that the wiring is compatible with the system's electrical infrastructure. Common installation mistakes include incorrect polarity or loose connections, which can lead to erratic operation or failure. Technicians should also check that the drive is aligned correctly with the valve stem to prevent binding or misalignment during operation.Compatibility and accessories This servo drive is specifically designed for use with IVAR PAW mixing valves. It is compatible with the PAW.SR2, PAW.SR5, and PAW.SR10 variants, which offer different torque ratings (2 Nm, 5 Nm, and 10 Nm respectively). When installing the drive, it is necessary to ensure that the selected valve model matches the system's hydraulic and mechanical requirements. No additional accessories are required for standard operation, but installers should verify the presence of all necessary components before commissioning the system.Technical background for designers The IVAR servo drive operates on an that converts electrical energy into rotational motion. The motor is controlled by an internal circuit that regulates the speed and direction of rotation based on input signals. The housing is typically made of durable materials to withstand the operating conditions in heating systems. The drive integrates into the system via mechanical coupling with the valve stem and electrical connections to the control system. The service life and efficiency of the drive are influenced by factors such as the quality of the electrical supply, the alignment with the valve, and the of operation. Proper integration ensures that the drive can respond accurately to control signals without causing wear or mechanical stress.Service and operation The IVAR servo drive requires minimal maintenance under normal operating conditions. However, periodic checks should be performed to ensure that the electrical connections are secure and that the drive is free from dust or debris that could affect performance. Technicians should also verify that the drive is operating within its specified parameters and that there are no signs of mechanical wear or binding. If the drive exhibits erratic behavior or fails to respond to control signals, it may indicate an issue with the electrical supply or internal components that require further investigation.Frequently asked questions

Can the IVAR servo drive be used with 24 V control systems?
Yes, the drive is compatible with both 230 V and 24 V supply voltages, making it suitable for a range of control systems.

What is the maximum torque available from the IVAR servo drive?
The maximum torque available is 5 Nm, which is suitable for medium-sized mixing valves in boiler applications.

Is the IVAR servo drive suitable for use with PAW.SR10 mixing valves?
No, the 5 Nm torque of this drive is not sufficient for the PAW.SR10 variant, which requires a higher torque rating.

How long does it take for the IVAR servo drive to reach its full rotation?
The drive has a time constant of 140 seconds, meaning it takes approximately this time to complete a full 90° rotation.