Assembly distributor IVAR.CI 557 VP, 5-way

Product detailed description

Underfloor heating systems in residential and commercial buildings require precise flow distribution to maintain thermal comfort across multiple zones. This pre-assembled distributor unit combines manifold functionality with integrated pumping capability for direct installation in mechanical rooms or utility spaces. The compact design suits both new constructions and retrofit projects requiring zoned temperature control.

The unit connects directly to a boiler or heat pump circuit and distributes heated water to individual loop circuits via separate supply and return connections. Each zone can be independently balanced using manual balancing valves built into the manifold body. The integrated circulation pump ensures consistent flow rates even during partial load conditions.

Technical parameters

Material	Brass CW617N. Assembly includes
Operating temperature	+90 °C
Nominal pressure	PN 6
EAN	8595145905966
Weight	23.32 kg
Code	557673VP
Brand	IVAR

The operating temperature limit of 90°C determines suitability for conventional hot water heating systems. The PN6 pressure rating indicates compatibility with standard domestic heating pressures. Brass CW617N offers corrosion resistance in closed heating systems containing glycol mixtures or standard water-based media.

Installation and connection

Mount the unit horizontally on a stable surface near the heat source. Connect the inlet to the boiler or heat pump circuit using 2" male threads. The five outlet ports connect to individual loop circuits via 1" female threads. Ensure all pipe connections are fully tightened and tested for leaks before insulation. Common installation errors include incorrect orientation of the pump housing and reversed cold/hot side connections. Always verify the direction of flow indicated on the pump casing before securing electrical connections.

Compatibility and accessories

This unit requires connection to standard 230V single-phase power supply. For system balancing, add differential pressure regulators and flow meters to each circuit. Additional components such as expansion vessels and safety valves should be installed according to local regulations. The unit integrates with IVAR.CI 557 VP pump control systems for automated operation.

Technical background for designers

The unit functions as both a flow distributor and active circulation device. The brass CW617N construction resists dezincification in closed systems with proper pH levels. Thermal expansion compensation is achieved through flexible hose connections between the unit and adjacent pipework. Proper sizing depends on total circuit length, pipe diameters and required flow rates per zone. The pump performance curve should intersect with the system resistance curve for optimal efficiency.

Service and operation

Periodically inspect the pump for abnormal noise or vibration. Check all threaded connections annually for signs of leakage. Clean the pump impeller if reduced flow performance is observed. The system should be drained and flushed every five years according to manufacturer guidelines. Monitor pressure fluctuations during operation to detect potential blockages in individual circuits.

Frequently asked questions

Can this unit be connected to a condensing boiler system?
Yes, provided the system water quality meets the manufacturer's specifications for pH and oxygen content.

What pipe size should be used for the main supply line?
A 2" diameter pipe is recommended for the main supply connection to minimize pressure loss.

How are the individual circuits balanced?
Each port contains a manual balancing valve that adjusts flow based on circuit length and heat demand calculations.