Circulation pump group Afriso PrimoTherm K 180-1 DN25, no mixing, Wilo pump (MPN 77819)

Afriso PrimoTherm K 180-1 DN25 circulation pump group with integrated Wilo pump is a connection-ready assembly designed for hydraulic circulation in heating systems that do not require mixing. The compact DN25 unit combines piping, shut-off valves and a factory-fitted pump to provide a straightforward solution for boiler circuits, radiator return loops and domestic hot-water recirculation. The assembly is intended to improve installation efficiency and ensure consistent flow control and pump operation in central heating applications.

Advantages

The preassembled pump group reduces installation time by combining necessary hydraulic components into a single unit and eliminates the need for separate pump mounting. The integrated Wilo pump ensures reliable circulation performance and is matched to the hydraulic layout of the DN25 piping. Durable construction and standard threaded connections support straightforward integration into existing systems while minimizing leak points and alignment work.

Suitable for

• Hydraulic circulation in central heating systems without mixing
• Boiler circulation loops and radiator return lines
• Hot-water recirculation in residential and light commercial buildings

Key specifications

• Nominal pipe size: DN25
• Preassembled pump group with integrated circulation pump
• Threaded connections for straightforward installation
• Designed for non-mixing hydraulic circuits
• Compact, space-saving assembly suitable for boiler rooms and service cupboards

How to use

Install the pump group inline with the system piping using the specified DN25 connections and ensure all valves are accessible for service. Connect the electrical supply to the integrated pump following the pump manufacturer's wiring instructions and local electrical codes. Flush and fill the hydraulic circuit, then vent air from the pump and system at appropriate points. Start the pump and verify correct flow direction, pressure and temperature parameters before regular operation.

Usage recommendations

For reliable long-term operation, follow the pump manufacturer's maintenance schedule, check for correct electrical connections and protect the assembly from freezing. Use appropriate isolation valves to allow pump replacement without draining the entire system and perform periodic system flushing to prevent debris accumulation.