Boiler set - MIX 4 - mixed with overflow valve - DN 32; DAB.EVOSTA 3 40/180; 230V IVAR.KS MIX 4

Product detailed description

This boiler set is commonly used in residential and commercial heating systems where precise temperature control and overflow protection are required. It is suitable for integration with central heating boilers, heat pumps, and solar thermal systems. The set is designed for use in systems with nominal pressure PN 10 and operating temperatures up to +120 °C. Installers typically work with this unit in applications where a 4-way mixing valve is needed to regulate flow and temperature distribution.

The boiler set is installed in the primary circuit of the heating system, ensuring that the return water is mixed with the supply water to maintain the desired temperature. The overflow valve provides safety by releasing excess pressure when necessary. The unit is designed for use in systems with internal and external pipe connections of 1 1/4 inch, making it compatible with standard piping configurations in European installations.

Technical parameters

The maximum flow rate of 3000 l/h indicates the unit’s capacity to handle high-volume systems, such as those in larger buildings or multi-zone heating applications. The operating temperature of +120 °C defines the upper limit for the system’s thermal performance, ensuring compatibility with high-temperature heat sources. The PN 10 rating specifies the maximum allowable pressure in the system, which is essential for proper sizing and selection in accordance with system requirements.

Installation and connection

Installation involves connecting the boiler set to the heating system’s supply and return lines using 1 1/4 inch internal and external threads. The set includes a circulation pump, 4-way mixing valve, and actuator, which must be aligned with the system’s control logic. The overflow valve must be positioned to allow for proper pressure relief. Common installation errors include incorrect orientation of the mixing valve or improper alignment of the pump, which can affect system performance. It is important to verify that all connections are sealed and that the actuator is correctly wired to the control system.

Compatibility and accessories

This boiler set is compatible with IVAR’s control systems and actuators, including the optional IVAR.ACTUATORS 24S model for 0–10 V control. The set includes a circulation pump, overflow valve, and thermal insulation, but additional components such as control panels or expansion vessels may be required depending on the system design. No alternative or related products are specified for this model.

Technical background for designers

The boiler set operates by mixing return water with supply water to maintain a consistent temperature in the system. The 4-way mixing valve is controlled by the actuator, which adjusts the flow based on temperature feedback. The brass components (CW617N and CB753S) provide corrosion resistance and durability in high-temperature environments. The thermal insulation helps reduce heat loss and improves system efficiency. The service life and efficiency of the unit depend on the quality of installation, correct sizing of the pump and valve, and regular maintenance of the actuator and pump.

Service and operation

Periodic inspection of the overflow valve and actuator is recommended to ensure proper function. The circulation pump should be checked for noise and vibration, which may indicate wear or blockage. The mixing valve should be tested for correct positioning and response to control signals. No specific service intervals are provided in the brief.

Frequently asked questions

Can the boiler set be connected to a solar thermal system?
Yes, the boiler set can be integrated into solar thermal systems as long as the control system is compatible with the actuator and pump.

Is the overflow valve replaceable without removing the entire unit?
The overflow valve is part of the boiler set and is not designed for separate replacement without disassembling the unit.

Can the actuator be upgraded to a different model?
The IVAR.ACTUATORS 24S model is available for order as an upgrade, but it must be compatible with the existing control system.

What materials are used for the internal components?
The internal components are made of CW617N brass, which is suitable for high-temperature and high-pressure applications.