Manifold - fitted with shut-off valves - 1 "xEK; 3-way; brass IVAR.CS 553

Product detailed description

This manifold is commonly used in residential and commercial buildings with underfloor heating systems. It enables precise control over the return water flow in radiant heating circuits, particularly when zoning or balancing is required. Installers typically use it in conjunction with thermostatic heads or actuators to manage individual loop temperatures. The device is suited for systems where a combination of floor heating and radiator circuits is present, ensuring compatibility with both types of heat emitters.

The brass construction provides robustness and resistance to corrosion, making it suitable for long-term use in closed heating systems. The operating temperature limit of 120°C ensures safe operation within standard heating system parameters. The 50 mm spacing between outlets simplifies layout planning and minimises the need for additional fittings during installation.

Technical parameters

Installation and connection

Installers should connect the main inlet using a 1 inch female thread and route the three 3/4 inch EK outlets to individual heating loops. All connections should be tightened to the manufacturer’s recommended torque to prevent leakage. A thorough system flush is required before commissioning, especially when integrating floor heating with other types of circuits. Common mistakes include incorrect thread sealing, misalignment of the outlets, and failure to flush the system prior to operation.

Compatibility and accessories

This manifold is compatible with a range of actuators and thermostatic heads. The manual shut-off valves can be replaced with electric heads such as IVAR.TE 3040, IVAR.TE 4040, IVAR.TE 3041, and IVAR.TE 4041. When designing the system, ensure that the selected actuators match the thread type and that the control wiring is correctly integrated with the building's HVAC system.

Technical background for designers

The manifold operates by distributing return water from the heating system to multiple circuits. The CW617N brass body provides good thermal conductivity and mechanical strength, while also resisting corrosion in closed systems. The design allows for individual circuit isolation via the shut-off valves, which is useful for maintenance and system balancing. The efficiency of the manifold depends on correct sizing of the connected circuits and proper insulation of the piping to avoid thermal losses.

Service and operation

Regular visual inspections are recommended to check for signs of leakage or corrosion at the connections. The system should be flushed according to the manufacturer’s instructions before initial operation and periodically thereafter, especially when system performance declines. No specific service intervals are defined, but the system should be checked after any major modifications or if unusual noise or flow irregularities occur.

Frequently asked questions

Can this manifold be used with electric actuators?
Yes, the manual shut-off valves can be replaced with compatible electric heads such as IVAR.TE 3040, IVAR.TE 4040, IVAR.TE 3041 and IVAR.TE 4041.

What is the recommended procedure for system flushing?
A complete system flush is required before commissioning, particularly when combining floor heating with radiator circuits. Follow the manufacturer’s guidelines to ensure all debris is removed.

Is this manifold suitable for high-temperature applications?
No, the maximum operating temperature is 120°C. Exceeding this could affect the integrity of the seals and internal components.

How many circuits can be controlled with this manifold?
The 3-way design allows for control of three separate heating circuits, each connected to a dedicated outlet.