Assembly distributor IVAR.CI 557 KS, 9-way

Product detailed description

This 9-way floor heating distributor is commonly used in residential and commercial buildings where a hybrid system of floor and radiator heating is required. It is typically installed in mechanical rooms or utility areas where space allows for the integration of a circulation pump and control components. The unit is designed to manage both low-temperature floor heating loops and higher-temperature radiator circuits, ensuring balanced heat distribution and system efficiency. Installers should be aware of the need for thorough system flushing and chemical treatment prior to commissioning, especially in mixed systems where different pipe materials may be used.

Correct installation of this distributor requires careful planning to accommodate the pump orientation and overall unit dimensions. The distributor must be positioned to allow for proper air venting and access to control components. It is not suitable for use with condensing boilers or heat pumps, and the system must be chemically treated to prevent internal corrosion and fouling. The unit is supplied with mounting brackets and a range of control components, but external pump control or a dedicated thermostat may be required for full system automation.

Technical parameters

The rated pressure of PN 6 indicates the maximum allowable pressure for continuous operation, which is important for sizing the system and selecting compatible components. The maximum operating temperature of +90 °C defines the upper limit for the system’s thermal performance, ensuring compatibility with standard heating systems. These parameters are essential for determining the suitability of the distributor in mixed heating applications and for ensuring long-term reliability.

Installation and connection

The distributor is connected using internal 3/4 inch female threads, which must be matched with compatible fittings on the supply and return lines. The unit includes mounting brackets for secure installation on walls or in cabinets. During installation, it is important to ensure that the pump is oriented correctly—either front or side-mounted—according to the available space and system layout. The front-mounted position has a depth of 160 mm, while the side-mounted position has a depth of 132 mm. Incorrect pump orientation can affect system performance and may lead to premature wear.

Before commissioning, the system must be thoroughly flushed to remove any debris or contaminants that could damage the internal components. The presence of flow meters and thermostatic controls requires careful alignment and calibration to ensure accurate readings and proper operation. Installers should also verify that the electrical connections for the circulation pump are correctly made and that the pump is not part of the distributor’s standard configuration—external control may be required.

Compatibility and accessories

This distributor is designed for use in mixed floor and radiator 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), two automatic air vents, a thermometer, and a range of shut-off and drain valves. Additional components such as an external thermostat (IVAR.AC 614 E) may be required for full system control. The unit is not supplied with a pump switch, which must be integrated separately into the system’s control strategy.

Technical background for designers

The distributor operates by dividing the incoming hot water supply into multiple circuits, each of which can be individually controlled using the integrated thermostatic valve and flow meters. The brass CW617N construction provides good corrosion resistance and mechanical strength, making it suitable for use in closed heating systems. The thermostatic valve includes a separate temperature sensor for maintaining a constant temperature, which is essential for ensuring even heat distribution and system efficiency. The integration of a circulation pump allows for active flow control, which is particularly important in mixed systems where different heat emitters have varying thermal demands.

The system’s efficiency and service life are influenced by the quality of the installation, the presence of chemical treatment, and the regularity of maintenance. The use of a separate pump control or thermostat can further enhance system performance by allowing for more precise temperature regulation and energy management. Designers should also consider the need for proper air venting and system balancing to prevent issues such as airlocks or uneven heat distribution.

Service and operation

Regular maintenance is essential to ensure the continued performance of the distributor and its components. The system should be inspected for leaks, blockages, and signs of corrosion, particularly around the pump and valve connections. The automatic air vents should be checked for proper operation, and the flow meters should be verified for accuracy. The system should be chemically treated with a preparation such as GEL.LONG LIFE 100 to prevent internal fouling and corrosion. If the system is not used for extended periods, it should be drained and stored dry to prevent damage from freezing or condensation.

Frequently asked questions

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

Is the circulation pump included in the distributor?
The circulation pump is included as part of the distributor, but the pump switch is not and must be added separately.

Can this distributor be used with a condensing boiler?
No, the distributor is not suitable for use with condensing boilers or heat pumps due to the system’s operating parameters and design limitations.

What is the maximum operating temperature of the distributor?
The distributor is rated for a maximum operating temperature of +90 °C, which is suitable for standard heating systems but not for low-temperature applications.