DUAL-MIX - Combination heating kit - N-MAX 3 - 1 "xEK cabinet; 8-way; brass IVAR.CI 557 VP

Product detailed description

This combination heating kit is suitable for installations involving both floor heating and radiator systems in residential and commercial buildings. It supports the integration of multiple heating circuits into a single control unit, allowing for balanced heat distribution and efficient system management. The kit is commonly used in underfloor heating systems with radiators, where precise temperature control and flow regulation are essential. Installers typically handle the mounting, piping, and commissioning of the unit within a dedicated housing.

Technical parameters

Material	Brass CW617N
Operating temperature	+90 °C
Nominal pressure	PN 6
Code	557676VPN
Brand	IVAR

These parameters are crucial for selecting the correct unit for a specific application. The operating temperature of +90 °C indicates the maximum sustained temperature of the system fluid. The nominal pressure rating of PN 6 defines the maximum allowable working pressure. The material, brass CW617N, ensures good mechanical strength and corrosion resistance in heating environments.

Installation and connection

Installers should begin by positioning the unit within the designated housing, ensuring sufficient space for maintenance and pipe connections. The internal thread size is 1 inch female (1” F), which must be matched with corresponding supply and return piping. All components should be mounted level and aligned to prevent stress on the connections. Check that all valves are in the closed position before connecting to the system. Common installation errors include incorrect orientation of the bypass, misalignment of flow meters, and improper sealing of threaded joints. Always follow the manufacturer’s instructions for securing the unit and routing the electrical connections for the pump.

Compatibility and accessories

The unit is compatible with standard floor heating and radiator systems. Additional components such as an external thermostat (e.g., IVAR.AC 614 E) may be required to control the circulation pump. The housing must be specified at the time of ordering—choose between built-in, wall-mounted, or without a housing. Accessories such as insulation, pipe fittings, and expansion vessels should be ordered separately based on the system design.

Technical background for designers

This heating kit operates by distributing heated water through multiple circuits using a central manifold. The brass construction provides durability and thermal conductivity, while the integrated thermostat maintains a constant temperature by modulating the pump speed. The CW617N grade is selected for its resistance to dezincification and pitting corrosion in hot water environments. Proper sizing of the unit depends on the total heat load, circuit lengths, and flow rates. System efficiency is influenced by the quality of insulation, the accuracy of flow meter readings, and the responsiveness of the control system.

Service and operation

Periodic checks should be carried out to ensure all valves operate smoothly and the pump runs without vibration or noise. The system should be flushed before commissioning and at regular intervals to remove debris. The bypass function allows for system balancing and maintenance without interrupting operation. If the pump fails to start or the temperature control is inconsistent, check the electrical connections and the condition of the thermostat head.

Frequently asked questions

Can the circulation pump be controlled externally?
Yes, the pump can be controlled via an external thermostat or a higher-level control system, such as IVAR.AC 614 E.

Is the housing included in the standard package?
No, the housing must be specified at the time of ordering—options include built-in, wall-mounted, or without a housing.

Can this unit be used with a condensing boiler?
Yes, provided the system is compatible with the operating temperature and pressure ratings of the unit.

What should be done before starting the system for the first time?
The entire system should be flushed according to the manufacturer’s instructions, and it is recommended to treat the system with GEL.LONG LIFE 100 to prevent corrosion.