DUAL-MIX - Combination heating kit - without cabinet - 1 "xEK; 9-way; brass IVAR.CI 557 VP

Product detailed description

This combination heating kit is designed for use in residential and commercial buildings with mixed heating systems, such as those combining underfloor heating with radiators. It is commonly used in new builds and renovations where precise temperature control and zoning are required. The system is installed by heating engineers and service technicians who manage the integration of multiple heating circuits into a single, controllable unit. The kit allows for individual circuit control and balancing, ensuring even heat distribution and energy efficiency.

Installation typically involves mounting the unit in a central location, connecting it to the boiler and heating circuits, and configuring the control components. The unit is suitable for systems where the maximum operating temperature is 90°C and the nominal pressure does not exceed PN 6. The brass construction ensures durability and resistance to corrosion in typical heating environments.

Technical parameters

Material	Brass CW617N
Operating temperature	+90 °C
Nominal pressure	PN 6
Code	557677VPBS
Brand	IVAR

The operating temperature of +90°C and nominal pressure of PN 6 define the conditions under which the unit can safely operate. These parameters are essential for sizing the system and ensuring compatibility with the boiler and other components in the heating network. The material, brass CW617N, is selected for its mechanical strength and resistance to thermal expansion and corrosion.

Installation and connection

The unit is connected via an internal 1” F thread, which must be verified for compatibility with the boiler or heat source. During installation, it is important to ensure that all connections are properly sealed and that the unit is mounted securely using the provided mounting brackets. A common mistake is neglecting to flush the system before commissioning, which can lead to blockages or reduced efficiency. The circulation pump must be wired according to the electrical installation provided in the kit, and the bypass must be correctly configured to allow for system balancing.

Compatibility and accessories

The DUAL-MIX 557677VPBS is compatible with standard floor and radiator heating systems. It includes a thermostat with a separate immersion temperature sensor for constant temperature regulation. However, the pump shut-off function is not part of the kit and must be controlled via an external thermostat or a higher-level control system such as the IVAR.AC 614 E. Additional components such as expansion vessels or balancing valves may be required depending on the system design.

Technical background for designers

The unit operates by distributing heated water through multiple circuits, with individual flow regulation for each. The brass CW617N material provides good thermal conductivity and mechanical stability, making it suitable for long-term use in heating systems. The integration into the overall system depends on the design of the piping and the control strategy. The service life and efficiency are influenced by the quality of the installation, the cleanliness of the system, and the use of appropriate maintenance procedures such as system flushing and treatment with GEL.LONG LIFE 100.

Service and operation

Regular maintenance includes checking for leaks, ensuring the correct operation of the circulation pump, and verifying the function of the shut-off and balancing valves. The system should be flushed before commissioning and periodically during operation to remove debris. The use of a system treatment is recommended to prevent scaling and corrosion. No specific service intervals are provided in the brief, but adherence to the manufacturer’s guidelines is essential for maintaining performance.

Frequently asked questions

Can the circulation pump be controlled externally?
Yes, the pump shut-off function is not included in the kit and must be controlled via an external thermostat or the IVAR.AC 614 E control unit.

Is the unit suitable for mixed floor and radiator heating systems?
Yes, the DUAL-MIX 557677VPBS is specifically designed for use in systems that combine floor heating with radiators.

What is the recommended system preparation before commissioning?
It is recommended to flush the entire system according to the manufacturer’s instructions and treat it with GEL.LONG LIFE 100 to prevent contamination and improve efficiency.

What is the purpose of the bypass in the kit?
The bypass allows for system balancing and ensures that the circulation pump can operate efficiently even when certain circuits are closed or inactive.