Assembly distributor IVAR.CI 557 KS, 5-way

Product detailed description

The IVAR.CI 557 KS 5-way distributor is commonly used in residential and commercial buildings where combined floor and radiator heating systems are required. It is suitable for installations where a single heat source serves both low-temperature floor heating and higher-temperature radiator circuits. The unit is typically installed in mechanical rooms or utility areas, where it can be accessed for maintenance and monitoring. It is essential to ensure that the system is flushed and treated with a suitable inhibitor before commissioning to prevent blockages and corrosion.

Installers working with this distributor must be familiar with the integration of multiple heating circuits and the use of thermostatic and flow control components. The unit is designed for use with conventional boilers and must not be connected to condensing boilers or heat pumps. It is also important to consider the orientation of the circulation pump and its impact on the overall system layout and dimensions.

Technical parameters

Nominal pressure	PN 6
Weight	10.649 kg
Code	557673KS
Brand	IVAR

The rated pressure of PN 6 indicates that the distributor is suitable for low-pressure heating systems. The maximum operating temperature of +90 °C is typical for conventional heating systems and must be considered when selecting compatible components. These parameters are essential for determining the suitability of the distributor for a specific installation and for ensuring compatibility with the heat source and other system components.

Installation and connection

The distributor is connected via internal 3/4 inch female threads, which must be matched with the corresponding supply and return piping. The installation process involves mounting the distributor on the wall using the provided brackets and connecting the individual heating circuits. It is important to ensure that the circulation pump is correctly oriented—either front or side—depending on the available space and the required depth. The pump must be aligned with the flow direction to avoid performance issues. Common installation mistakes include incorrect pump orientation, failure to flush the system before commissioning, and neglecting to check the tightness of all connections to prevent leaks.

Compatibility and accessories

The IVAR.CI 557 KS is designed for use with conventional boilers and is not compatible with condensing boilers or heat pumps. It includes a built-in circulation pump (DAB.EVOSTA 2 40-70/130), thermostatic control, flow meters, shut-off valves and a pressure relief thermostat. Additional components that may be required include a separate control thermostat for the circulation pump (IVAR.AC 614 E) and a system inhibitor such as GEL.LONG LIFE 100. The distributor must be housed in a suitable enclosure, with the recommended length specified in the manufacturer’s distributor table. The thermostatic valve on the inlet can be replaced with a VDS 01 or 02 type valve with a Kv flow coefficient if required.

Technical background for designers

The IVAR.CI 557 KS operates by distributing heated water to multiple floor heating circuits and a radiator circuit. The thermostatic valve regulates the temperature of the inlet water, while the flow meters allow for precise control of the flow rate in each circuit. The distributor is constructed from brass CW617N, a material known for its corrosion resistance and mechanical strength. The integration of the circulation pump allows for continuous flow and temperature regulation. The service life and efficiency of the distributor are influenced by the quality of the water in the system, the presence of debris and the regularity of maintenance. It is important to ensure that the system is properly balanced and that the pump is correctly sized for the required flow rate and pressure.

Service and operation

Regular maintenance of the IVAR.CI 557 KS includes checking the tightness of all connections, inspecting the circulation pump for signs of wear or blockage, and verifying the operation of the thermostatic valve and pressure relief thermostat. The system should be flushed periodically to remove debris and prevent blockages. The manufacturer does not specify service intervals, but it is recommended to inspect the distributor at least once per heating season. Any issues with the circulation pump must be addressed promptly to avoid system downtime. The distributor must not be used in systems with high levels of contamination, as this can lead to functional failures and void the warranty.

Frequently asked questions

Can the IVAR.CI 557 KS be connected to a condensing boiler or heat pump?
No, the distributor is not compatible with condensing boilers or heat pumps. It is designed for use with conventional boilers only.

Can the thermostatic valve on the inlet be replaced with a different type?
Yes, the thermostatic valve can be replaced with a VDS 01 or 02 type valve with a Kv flow coefficient if required.

Is the circulation pump included in the distributor?
Yes, the distributor includes a DAB.EVOSTA 2 40-70/130 circulation pump with electrical installation. However, the pump control is not part of the distributor and must be provided separately.

What is the recommended orientation for the circulation pump?
The pump can be oriented either front (position A = 165 mm, depth = 160 mm) or side (position A = 220 mm, depth = 132 mm), depending on the available space and installation requirements.