Boiler module HEAT BLOC - 3-way mixing valve - DN 25; DAB.EVOSTA2 40-70/180; drive 230V PAW.HEAT BLOC M34-MIX3-DN25

Product detailed description

The boiler module HEAT BLOC with a 3-way mixing valve is commonly used in residential and commercial heating applications. It allows precise control of flow distribution in systems requiring temperature regulation. Installers often integrate it with horizontal distribution manifolds or central heating units. The system requires careful alignment of flow and return lines to ensure optimal performance.

Typical installations include underfloor heating, radiator circuits, and combined systems. The module supports both primary and secondary circuit connections, ensuring compatibility with various boiler types. The inclusion of a circulation pump and integrated valves simplifies the setup for technicians working with closed-loop systems. The brass construction and thermal insulation contribute to long-term reliability in high-temperature environments.

Technical parameters

Material	Brass
Operating temperature	+110 °C
Nominal diameter	DN 25
Nominal pressure	PN 6
Code	443606070
Brand	IVAR

The operating temperature limit of +110°C and pressure rating of PN 6 determine the conditions under which the module can function safely. The DN 25 nominal diameter ensures compatibility with standard pipe sizes in heating systems. These parameters are essential for selecting the correct module size and verifying system compatibility during design and installation.

Installation and connection

To install the module, align the inlet and return ports with the system’s piping. The DN 25 ports feature internal 1” female threads, while the DN 32 ports have 5/4” female threads. Ensure all connections are tightened to the recommended torque to prevent leaks. Verify the orientation of the three-way valve to match the intended flow direction. Common errors include misaligned valve settings and incorrect pump wiring. Always check the electrical connections for the 230V drive before commissioning.

Compatibility and accessories

This module is compatible with horizontal distribution manifolds such as the PAW.HEAT BLOC V23-DN 25. For complete system integration, ensure the supporting infrastructure includes appropriate piping, insulation, and control devices. Additional components such as expansion vessels and balancing valves may be required depending on the system configuration. Related products should be verified for compatibility with the DN 25 and DN 32 port sizes.

Technical background for designers

The module operates by regulating the flow through the three-way mixing valve, allowing controlled blending of hot and return water. The brass material provides resistance to corrosion and thermal stress, making it suitable for high-temperature environments. The EPP thermal insulation minimises heat loss and prevents condensation. System efficiency depends on accurate sizing of the module relative to the required heat output and temperature differential. The 230V actuator ensures reliable operation with standard electrical supplies.

Service and operation

Regular inspection of the pump and valve seals is recommended to maintain system integrity. Check for signs of wear or leakage around the threaded connections and replace seals if necessary. The pump should be tested for flow consistency, and the valve should be manually operated periodically to ensure smooth movement. No specific service intervals are provided in the brief, but routine checks are advised in accordance with the manufacturer’s guidelines.

Frequently asked questions

Can the module be connected to a horizontal manifold?
Yes, it is designed for integration with the PAW.HEAT BLOC V23-DN 25 manifold via the DN 25 port.

Is the 230V drive compatible with standard electrical systems?
Yes, the 230V supply is suitable for standard single-phase electrical installations.

What is the maximum heat output for the DN 25 port?
It supports up to 44 kW at a temperature difference of 20K.

Are the ball valves equipped with built-in thermometers?
Yes, the two ball valves include integrated thermometers for monitoring system temperatures.