Expansion vessel for central heating CIMM ERE 12 L, pre-charge 1.5/4 bar, temperature -10 to +100 °C

Membrane expansion vessel CIMM ERE 12 L is designed for central heating systems to absorb volume changes of the heating medium and stabilize system pressure. With a nominal volume of 12 liters and a factory pre-charge of 1.5/4 bar, this vessel supports continuous operation in a temperature range from -10 to +100 °C. The diaphragm separates the pressurized air chamber from the liquid side, reducing the risk of corrosion and preserving system components by accommodating thermal expansion and pressure fluctuations.

Advantages

The CIMM ERE 12 L provides consistent pressure compensation thanks to its pre-charged diaphragm design, enabling quick response to pressure increases during heating cycles. Its wide operating temperature range makes it suitable for diverse climates and system conditions. The compact volume and standardized connections simplify installation in residential and small commercial systems while protecting pumps, valves and heat exchangers from pressure shocks.

Suitable for

• Residential central heating systems
• Small commercial heating installations
• Boilers and heat generator circuits requiring pressure stabilization
• Systems where thermal expansion compensation is required

Key specifications

• Nominal volume: 12 liters
• Factory pre-charge pressure: dual 1.5/4 bar
• Operating temperature range: -10 °C to +100 °C
• Diaphragm (membrane) type separation
• Intended medium: closed central heating fluid

How to use

Install the expansion vessel on the return line or at a location recommended by the heating system designer, ensuring the vessel is mounted vertically and securely. Verify and, if necessary, adjust the pre-charge pressure to match the static system pressure before filling. After installation, perform a system fill and venting procedure to remove air pockets, then check the vessel and system pressure during a heating cycle to confirm correct operation.

Usage recommendations

Regularly inspect the vessel for external damage and monitor system pressure periodically. Before maintenance, isolate and depressurize the section of the system containing the vessel. Match the pre-charge to the installed system’s static pressure and consult the heating system documentation or a qualified technician if adjustments are required.