Expansion vessel for Domestic Hot Water IBAIONDO 12L

Product detailed description

Expansion vessels for domestic hot water are essential components in closed systems where thermal expansion of water must be accommodated. These vessels are commonly installed in residential and commercial buildings, particularly in systems where water is heated by boilers, heat pumps, or solar thermal units. Installers working on DHW systems must ensure that expansion vessels are correctly sized and positioned to prevent pressure fluctuations and system damage. This vessel is specifically designed for DHW applications and not for heating systems, due to its higher pre-charge pressure and operating temperature range.

Proper integration of an expansion vessel ensures the system remains stable under varying thermal loads. The vessel must be connected to the DHW circuit upstream of the circulation pump and after the mixing valve, if present. It is important to verify that the vessel is installed in a location accessible for inspection and maintenance, and that it is not subject to freezing conditions.

Technical parameters

Installation and connection

Installation of the IBAIONDO 12L expansion vessel requires a 3/4 inch connection, which must be fitted with a suitable pipe thread and sealing compound. The vessel should be mounted in a vertical position, with the pressure gauge and valve accessible for adjustment. It is important to ensure that the vessel is not over-pressurised during installation and that the pre-charge pressure is verified using a pressure gauge. Common installation errors include incorrect orientation, failure to check the pre-charge pressure, and improper sealing of the connection threads.

Compatibility and accessories

This expansion vessel is compatible with standard DHW systems using copper or plastic piping. It is designed to work with pressure-reducing valves, temperature and pressure relief valves, and DHW circulation pumps. The valve is included in the package, but additional components such as a pressure gauge or isolation valves may need to be ordered separately. No specific related products are required for standard installation.

Technical background for designers

The IBAIONDO 12L expansion vessel operates on the principle of separating the water and air chambers using a fixed EPDM membrane. The membrane ensures that the water does not come into direct contact with the air, preventing contamination and corrosion. The vessel is constructed from steel with a powder-coated finish, providing durability and resistance to corrosion. The 1 mm wall thickness ensures structural integrity under operating pressures. The vessel is integrated into the DHW system to absorb expansion caused by temperature changes. The service life and efficiency of the vessel depend on correct pre-charge pressure, proper installation, and regular maintenance.

Service and operation

Regular checks should be performed to ensure the pre-charge pressure remains at 3 bar. If the pressure drops below this level, the vessel must be recharged using a suitable pump. The membrane should be inspected for signs of wear or damage, and the vessel should be drained and flushed if necessary. No specific service intervals are provided in the brief, but it is recommended to inspect the vessel annually as part of routine system maintenance.

Frequently asked questions

Can the IBAIONDO 12L be connected to a DHW system with a circulation pump?
Yes, the vessel can be connected to a DHW system with a circulation pump. It should be installed upstream of the pump to ensure proper operation and pressure stability.

Is the EPDM membrane suitable for hot water applications?
Yes, the EPDM membrane is suitable for hot water applications. It has a temperature range up to +100°C and provides a reliable seal between the water and air chambers.

Can the vessel be installed in a location exposed to freezing temperatures?
No, the vessel should not be installed in locations exposed to freezing temperatures. The operating temperature range is from -10°C to +100°C, but prolonged exposure to freezing conditions may damage the membrane and internal components.

Is the pre-charge pressure adjustable?
Yes, the pre-charge pressure is adjustable. It should be set to 3 bar using a pressure gauge and a suitable pump before installation. Regular checks are recommended to ensure the pressure remains within the specified range.