Assembly distributor IVAR.CI 557 KS, 3-way

Product detailed description

This 3-way floor heating distributor is commonly used in mixed heating systems where floor heating is combined with radiator circuits. It is typically installed in residential and commercial buildings with underfloor heating in combination with radiators. The unit is designed to manage flow distribution, temperature regulation, and system protection in such hybrid systems. The compact design allows for integration into standard heating layouts, and the inclusion of a circulation pump ensures efficient flow control without the need for additional external components.

When installing this distributor, the technician must consider the system layout, including the location of the floor heating loops and the radiator circuits. The unit is not suitable for condensing boilers or heat pumps, so it should be used in systems with conventional heating sources. The distributor must be installed in a location that allows for easy access to controls and valves, and the system must be flushed thoroughly before commissioning to prevent blockages or damage caused by debris.

Technical parameters

Nominal pressure	PN 6
EAN	8595145900657
Weight	9.415 kg
Code	557671KS
Brand	IVAR

The nominal pressure rating of PN 6 indicates that the distributor is suitable for systems operating at up to 6 bar pressure. The maximum operating temperature of 90°C means it is compatible with standard heating systems using hot water. These parameters are essential for sizing the distributor correctly and ensuring compatibility with the rest of the system components, including the boiler, radiators, and floor heating loops.Installation and connection The distributor is connected via an internal 3/4 inch female thread, which must be matched with compatible pipe fittings. The installation procedure involves securing the distributor to the wall using the provided mounting brackets and connecting the supply and return lines to the appropriate ports. It is important to ensure that the system is fully flushed before commissioning to remove any debris that could block the flow or damage the internal components. A common mistake during installation is incorrect orientation of the circulation pump, which can affect the flow direction and system performance. The pump can be rotated to either a front-facing position (165 mm depth) or a side-facing position (132 mm depth), depending on the available space and layout requirements.Compatibility and accessories This distributor is designed for use with conventional heating systems 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, and pressure relief. Additional components such as a pump controller (IVAR.AC 614 E) may be required for advanced control functions. The unit is not supplied with a switch for the circulation pump, so this must be handled by an external control system or thermostat. Accessories such as mounting brackets, flow meters, and shut-off valves are included in the package.Technical background for designers The distributor operates by regulating the flow of hot water between the floor heating loops and the radiator circuits. The brass body (CW617N) provides good corrosion resistance and durability in hot water environments. The thermostatic valve with a separate temperature sensor allows for precise temperature control, ensuring that the floor heating system maintains a constant temperature. The integration of a circulation pump ensures that the system can maintain the required flow rates without relying on gravity. The efficiency of the system is influenced by the correct sizing of the distributor, the quality of the system flush, and the maintenance of the internal components. The use of a pressure relief thermostat helps protect the system from overheating and potential damage.Service and operation Regular maintenance of the distributor includes checking the operation of the thermostatic valve, the circulation pump, and the pressure relief device. The system should be flushed periodically to remove any debris that could accumulate over time and affect performance. The automatic air vents should be inspected to ensure they are functioning correctly and allowing air to escape from the system. The temperature sensor should be checked for accuracy, and any signs of wear or damage should be addressed promptly. The manufacturer does not specify service intervals, so maintenance should be carried out based on the condition of the system and the requirements of the building.Frequently asked questions

Can the thermostatic valve be replaced with a different type?
Yes, the thermostatic valve on the inlet can be replaced with a VDS 01 or VDS 02 type valve with a flow coefficient (Kv) for alternative control methods.

Is the circulation pump switch included in the package?
No, the pump switch is not included. It must be controlled externally using a thermostat or a dedicated pump controller such as the IVAR.AC 614 E.

Can this distributor be used with a condensing boiler or heat pump?
No, the distributor is not suitable for use with condensing boilers or heat pumps. It is designed for conventional heating systems only.

What should be done before commissioning the system?
Before commissioning, the system must be thoroughly flushed to remove any debris. It is also recommended to treat the system with a preparation such as GEL.LONG LIFE 100 to protect against corrosion and ensure long-term performance.