Boiler module HEAT BLOC - 3-way shut-off valve - DN 25; without pump; 230V drive PAW.HEAT BLOC D31-DN25

Product detailed description

This boiler module is commonly used in residential and commercial heating systems where precise temperature control and flow management are required. Installers typically integrate it into systems with horizontal distribution manifolds, ensuring efficient heat distribution. The module is designed for use in systems operating under moderate pressure and temperature conditions, making it suitable for a wide range of building types, including multi-family dwellings and small commercial facilities.

The module is installed between the boiler and the heating circuit, acting as a central component in the system’s hydraulic balance. It allows for the mixing of supply and return water to maintain stable operating temperatures. The 3-way valve ensures that the correct proportions of hot and return water are blended, which is essential for maintaining system efficiency and preventing thermal stress on components.

Technical parameters

The operating temperature of +110°C indicates that the module is suitable for systems with high-temperature water, such as those using condensing boilers. The nominal pressure rating of PN 6 means it is designed for low-pressure environments, typical of most residential and small commercial heating systems. The DN 25 nominal diameter is a key factor in determining the module’s flow capacity and compatibility with other system components.

Installation and connection

Installation requires careful alignment with the boiler and distribution manifold. The DN 25 port uses an internal 1 inch thread, while the DN 32 port uses an internal 5/4 inch thread. Installers should verify that all connections are properly sealed and that the flow direction matches the manufacturer’s specifications. A common mistake is incorrect orientation of the 3-way valve, which can lead to inefficient mixing and reduced system performance. The module should be mounted in a location that allows for easy access to valves and the circulation pump for maintenance.

Compatibility and accessories

This module is compatible with the PAW.HEAT BLOC V23-DN 25 horizontal distribution manifold. To complete the system, the installer must also provide a boiler, circulation pump, and any necessary piping. Additional components such as pressure relief valves and expansion vessels may be required depending on the system configuration.

Technical background for designers

The module operates by directing flow through a 3-way valve, which allows for the controlled mixing of supply and return water. The brass construction ensures durability and resistance to corrosion, while the EPP insulation minimizes heat loss. The module integrates into the system by connecting to the boiler’s primary circuit and the secondary heating circuit. The efficiency of the system depends on correct sizing of the module to match the required heat output and temperature differential. Long-term performance is influenced by the quality of installation, the cleanliness of the water, and the stability of the system pressure.

Service and operation

Regular inspection of the 3-way valve and circulation pump is recommended to ensure continued performance. Installers should check for signs of leakage, corrosion, or blockages in the flow paths. The circulation pump should be tested periodically to confirm it is operating within its specified range. No specific service intervals are provided in the technical data, but maintenance should be carried out as part of routine system checks.

Frequently asked questions

Can the module be connected to a horizontal manifold?
Yes, the DN 25 port allows for direct connection to the PAW.HEAT BLOC V23-DN 25 horizontal distribution manifold.

Is the module suitable for high-temperature systems?
Yes, the operating temperature of +110°C makes it compatible with systems using high-temperature water.

What is the maximum heat output for DN 25?
The module can handle up to 46 kW at a temperature differential of 20K.

Can the module be used with a circulation pump?
Yes, the module includes a circulation pump as part of its standard configuration.