UNIMIX - universal assembly, without cabinet - 3/4 "xEK; 6-way; DAB.EVOSTA2 40-70/130; brass IVAR.UNIMIX

Product detailed description

The IVAR UNIMIX 557674UBS is a modular mixing unit designed for use in underfloor heating systems, particularly in residential and commercial buildings where precise temperature control and flow management are essential. It is commonly used in systems that integrate both floor heating and radiators, where a central mixing point is required to regulate the supply temperature and maintain system balance. This unit is installed in mechanical rooms or utility areas, where it serves as the central control point for the heating distribution. It is suitable for use in both new builds and retrofit projects, where the system requires a compact and efficient solution for temperature regulation and flow control.

Installers working with this unit typically deal with the integration of multiple heating zones, balancing of flow rates, and ensuring compatibility with existing control systems. The unit is designed to be installed in a wall or mounted cabinet, depending on the system layout and space constraints. The inclusion of a circulation pump, a three-way mixing valve, and a balancing valve allows for precise control of the heating circuit, ensuring even heat distribution and energy efficiency.

Technical parameters

Material	Brass CW617N
Operating temperature	+90 °C
Nominal pressure	PN 6
Code	557674UBS
Brand	IVAR

The operating temperature of +90°C and a nominal pressure rating of PN 6 are key parameters for system sizing and selection. These values indicate the unit is suitable for standard central heating systems with moderate pressure and temperature requirements. The brass CW617N material ensures corrosion resistance and long-term durability in typical heating environments.Installation and connection The unit is connected via internal 3/4 inch female threads, which must be matched with the corresponding fittings on the supply and return lines. During installation, it is essential to ensure that the flow direction of the circulation pump aligns with the system layout. The balancing valve should be adjusted according to the system's flow requirements, and the bypass must be set to allow for proper flow distribution. A common mistake is incorrect orientation of the three-way mixing valve, which can lead to inefficient temperature regulation. Installers should also verify that the mounting brackets are securely fastened and that the unit is level to prevent vibration and noise.Compatibility and accessories The unit is compatible with standard floor heating systems and can be integrated with radiators in mixed systems. It requires a separate control system for the circulation pump, such as the IVAR.AC 614 E thermostat. Additional components such as expansion vessels and pressure relief valves should be installed according to the system design. The cabinet type must be specified at the time of order, with options including wall-mounted, floor-standing, or no cabinet. No other related products are listed for this model.Technical background for designers The unit operates by mixing return water with heated supply water to maintain a constant temperature in the floor heating circuit. The three-way mixing valve is controlled by a separate thermostat, which adjusts the valve position based on the temperature of the water in the system. The brass CW617N material offers good thermal conductivity and resistance to corrosion, making it suitable for long-term use in heating systems. The unit's efficiency is influenced by the accuracy of the balancing valve settings and the correct sizing of the circulation pump. The presence of a bypass ensures that the system can maintain flow even when the mixing valve is closed.Service and operation Regular maintenance includes checking the circulation pump for proper operation and ensuring that the balancing valve is set correctly. The automatic air vents should be inspected for blockages and the system should be flushed according to the manufacturer's instructions before commissioning. The use of the GEL.LONG LIFE 100 treatment is recommended to prevent sludge and corrosion. No specific service intervals are provided in the brief, but the system should be inspected periodically for signs of wear or blockage.Frequently asked questions

Can the circulation pump be controlled separately from the mixing unit?
Yes, the circulation pump requires an external control system such as the IVAR.AC 614 E thermostat for operation.

Is the cabinet type included in the standard package?
No, the cabinet type must be specified at the time of order with options for wall-mounted, floor-standing, or no cabinet.

Can this unit be used in mixed floor heating and radiator systems?
Yes, the unit is suitable for mixed systems and includes a bypass for flow control between different heating zones.

What should be done before commissioning the system?
The system should be flushed according to the manufacturer's instructions, and the GEL.LONG LIFE 100 treatment is recommended to prevent internal corrosion and sludge buildup.