DUAL-MIX - Combination heating kit - without cabinet - 1 "xEK; 7-way; brass IVAR.CI 557 VP

Product detailed description

This 7-way combination heating kit is designed for use in mixed heating systems that integrate underfloor heating with radiators. It is commonly used in residential and commercial buildings where a balanced distribution of heat is required. The system is installed by heating engineers and service technicians who manage the integration of multiple heating circuits. The kit allows for individual circuit control and ensures even heat distribution across different zones. It is suitable for both new installations and system upgrades.

Technical parameters

Installation and connection

Installation begins with securing the manifold and collector to the wall or floor using the provided mounting brackets. The inlet and outlet connections are internal 1” F threads, which must be checked for compatibility with the system pipework. The circulation pump is connected to the electrical supply, and the control wiring must be verified for correct polarity and insulation. A common mistake is incorrect alignment of the bypass, which can lead to inefficient circulation. The system must be flushed before commissioning to remove debris and ensure smooth operation.

Compatibility and accessories

This kit is compatible with standard underfloor heating systems and radiator circuits. Additional components such as a boiler, expansion vessel and external control thermostat may be required for full system operation. The circulation pump control can be integrated with an IVAR.AC 614 E thermostat if automatic pump shut-off is needed. The cabinet must be ordered separately using the code suffixes: without cabinet (BS), built-in (standard code), or wall-mounted (code + N).

Technical background for designers

The system operates by distributing heated water through multiple circuits, each controlled by a flow meter and shut-off valve. The CW617N brass construction ensures long-term resistance to corrosion and thermal expansion. The 7-way configuration allows for individual circuit balancing, which is essential for maintaining even heat output. The integration of a bypass ensures that the pump continues to circulate water even when some circuits are closed. The system's efficiency depends on proper insulation of the manifold and correct balancing of the flow rates.

Service and operation

Regular maintenance includes checking the pump for vibration and noise, verifying the operation of the shut-off and balancing valves, and inspecting the manifold for leaks. The system should be flushed periodically to remove sediment and debris. The pressure relief valve and thermostat should be tested annually. The system must be flushed before commissioning, especially when combining underfloor and radiator heating, to prevent blockages and inefficiencies.

Frequently asked questions

Can the circulation pump be controlled externally?
Yes, the pump can be controlled using an external thermostat such as the IVAR.AC 614 E for automatic shut-off.

Is the cabinet included in the kit?
No, the cabinet must be ordered separately using the code suffixes: BS for no cabinet, standard code for built-in, or code + N for wall-mounted.

What is the maximum operating temperature?
The system is rated for a maximum operating temperature of +90°C, which is suitable for standard central heating applications.

Can this kit be used with both underfloor and radiator heating?
Yes, the 7-way configuration allows for the integration of both underfloor heating loops and radiator circuits in a single system.