Avansa 25/4/130

Product detailed description

This circulation pump is designed for installation in residential and commercial buildings where controlled water circulation is required. It is commonly used in central heating systems, domestic hot and cold water distribution, and industrial circulating systems. The pump provides three distinct flow rates through its speed settings, enabling precise system adjustment. It operates within a temperature range of -10°C to +110°C, making it suitable for both heating and cooling applications.

The compact design allows for installation in tight spaces such as mechanical rooms, under sinks, or within wall cavities. The pump is intended for use with clean water containing no significant particulate matter. The IP44 rating ensures protection against dust and splashing water, but not submersion or high-pressure jets. The 130mm spacing between inlet and outlet simplifies alignment with existing pipework in retrofit or new installations.

Technical parameters

The pump's performance is defined by its maximum head of 4m and a maximum flow rate of 48 l/min. These values are critical for system sizing and determining whether the pump can meet the hydraulic demand of the application. The three speed options allow for flexibility in matching the pump to the system curve. The 230V single-phase supply makes it compatible with standard European electrical infrastructure.

Installation and connection

Install the pump in a location that allows access to the terminal block and speed control switch. Ensure the mounting surface is level and rigid to prevent vibration transfer. Connect the pump using DN40 or 6/4" pipe fittings. The inlet and outlet ports are both 25mm DN, requiring appropriate pipe reducers or adapters if connecting to different sizes. Verify that the pipework is fully supported and that the pump is not subject to excessive stress from misalignment or thermal expansion.

Before energising the pump, confirm that the electrical connections match the motor's 230V rating and that the phase sequence is correct. The speed control switch should be set according to the system requirements, typically determined during commissioning. Common installation errors include incorrect orientation (e.g., vertical instead of horizontal mounting), failure to bleed the system before starting, and neglecting to secure the pump to a stable base, which can lead to premature wear or vibration-induced damage.

Compatibility and accessories

This pump is compatible with standard copper, PVC, or PPR piping systems and can be integrated with thermostatic controls or programmable controllers for automated operation. For secure electrical connections, use a dedicated circuit with appropriate fuse protection. A mounting bracket may be required for overhead or vertical installation. Accessories such as pressure gauges, non-return valves, and isolation valves should be installed according to system design requirements.

Technical background for designers

The pump operates on a single-phase asynchronous motor with a bipolar design that eliminates the need for overload protection devices. The motor's insulation class FH ensures reliable operation under elevated temperatures. The pump casing is constructed from cast iron and plastic components, providing durability and resistance to corrosion in water-based environments. The three-speed functionality is achieved through internal switching that adjusts the motor's load characteristics. When integrating the pump into a system, consider the total dynamic head, including friction losses and elevation changes, to ensure the selected speed setting matches the required flow rate. The pump's efficiency is maximised when operating near the design point of the system curve.

Service and operation

Regular inspection should focus on the integrity of electrical connections, the condition of seals and gaskets, and the absence of unusual noise or vibration during operation. Check the speed control switch periodically to confirm it remains in the desired position. The pump does not require scheduled servicing such as lubrication or bearing replacement, but any signs of leakage or overheating should prompt immediate investigation. If the pump fails to operate, verify the power supply, check for blown fuses, and ensure the speed switch is correctly set. In the event of persistent issues, refer to the manufacturer's technical documentation for further guidance.

Frequently asked questions

Can the pump be used in a closed-loop geothermal system?
Yes, provided the system contains clean water and the temperature range remains within -10°C to +110°C. The pump is suitable for closed-loop applications where fluid recirculation is required.

Is it possible to wire the pump for remote speed control?
No, the speed control is fixed via a switch mounted on the terminal block and cannot be adjusted remotely. Manual adjustment is required at the pump location.

Can the pump be installed in a vertical position?
Yes, but ensure the mounting surface is stable and the pump is aligned to prevent stress on the inlet and outlet ports. A mounting bracket may be necessary for secure installation.

What type of protection is available for electrical faults?
The pump does not have built-in overload protection, so it should be connected to a circuit with appropriate fuse or circuit breaker protection to prevent damage from overcurrent conditions.