Expansion tank Cimm ERE CE 200 L

Product detailed description

Expansion tanks are essential components in closed-loop heating systems, particularly in residential and commercial buildings where thermal expansion of water must be safely accommodated. These tanks prevent excessive pressure build-up in the system, ensuring safe and efficient operation. Installers often encounter situations where system expansion must be managed without relying on atmospheric venting. The Cimm ERE CE 200 L is suited for such applications, where controlled pressure regulation is required to avoid damage to pipes, radiators and pumps.

In typical installations, the tank is positioned near the boiler or in a dedicated mechanical room. It connects to the system via a dedicated pipe, usually close to the circulation pump. The tank’s internal diaphragm separates the air chamber from the water chamber, allowing the tank to absorb volume changes due to temperature fluctuations. This ensures the system remains pressurised and avoids airlock issues. For larger systems or multi-zone installations, careful sizing is necessary to match the tank capacity with the system’s thermal expansion requirements.

Technical parameters

Installation and connection

Before installation, verify the tank’s orientation and ensure it is mounted vertically with the inlet at the bottom. The connection thread is M 1" G, which must be compatible with the system piping. Apply a sealing compound or PTFE tape to the thread to prevent leaks. Connect the tank to the system using a dedicated pipe, ideally close to the boiler or pump inlet. Ensure the tank is isolated from direct sunlight and placed in a location accessible for inspection and maintenance. Common installation errors include incorrect orientation, undersized connecting pipes, or failure to purge air from the system after installation.

Compatibility and accessories

The Cimm ERE CE 200 L is designed for use with closed heating systems and is compatible with standard pressure relief valves and expansion vessel fittings. Additional components such as pressure gauges, air valves and isolation valves may be required depending on the system configuration. Accessories should be selected based on the system’s design pressure and flow rate. There are no related products listed for this model.

Technical background for designers

The tank operates on the principle of separating air and water using an internal diaphragm. As the system heats and cools, the diaphragm expands or contracts to accommodate the volume change of the water, maintaining a stable pressure. The tank is constructed using durable materials suitable for long-term exposure to water and thermal cycling. Proper integration into the system requires consideration of the total expansion volume and the system’s pressure dynamics. Factors such as the initial pre-charge pressure and the tank’s internal volume directly affect its performance and service life. The tank must be sized according to the system’s thermal mass and expected temperature variations to avoid frequent pressure fluctuations.

Service and operation

Periodic checks should include verifying the tank’s pressure against the system’s operating pressure and inspecting for signs of corrosion or leakage. The tank should remain dry and free from condensation. If the tank becomes waterlogged or loses its ability to absorb expansion, it should be replaced. No specific service intervals are provided in the brief, so refer to the manufacturer’s technical documentation for detailed maintenance procedures.

Frequently asked questions

Can the Cimm ERE CE 200 L be used in combination with a pressure relief valve?
Yes, the tank is suitable for use with pressure relief valves provided the valve’s set pressure does not exceed the tank’s maximum overpressure rating of 6.0 bar.

Is the tank suitable for outdoor installation?
No, the tank should be installed indoors where it is protected from freezing and direct weather exposure, given its operational temperature range starts at -10°C.

What is the recommended orientation during installation?
The tank must be mounted vertically with the inlet at the bottom to ensure proper function and to prevent mechanical stress on the internal diaphragm.

Does the tank require a separate air valve for maintenance?
It depends on the system configuration. An air valve may be necessary to release trapped air during commissioning or if the tank’s pressure drops significantly over time.

Documents for download

• Dokument na stiahnutie (PDF)
• Dokument na stiahnutie (PDF)
• Dokument na stiahnutie (PDF)