Heating cartridges EJK maxi MR ST – The perfect addition to heating and photovoltaic systems

The EJK maxi MR ST series of cartridge heaters combines functionality, efficiency, and flexibility. These innovative devices consist of a powerful heating element and an electrical distributor that includes both a modular contactor and a practical 3-stage cam switch. This makes them an ideal solution for various heating systems, especially in combination with photovoltaic systems and heat pumps.

Modular contactor for flexible energy supply

A key feature of the cartridge heaters is the integrated modular contactor. This enables direct connection to external energy sources, such as heat pumps. The heat pump's automation ensures optimal control of the cartridge heater to maximize efficiency and energy consumption. This innovative solution enables seamless operation throughout the entire heating installation, without the need for additional manual intervention.

3-stage cam switch for individual power control

The integrated 3-stage cam switch allows for easy and flexible regulation of the heating cartridge's power output. This is particularly useful for changing requirements, such as those that may arise when using a photovoltaic system. The user can manually adjust the power output to reduce power consumption, thereby improving efficiency during periods of limited solar energy, such as on cloudy days.

Using the cam switch, it is possible to set the heating cartridge to a fraction of its maximum power, which not only saves energy but also takes into account the power consumption of other household appliances.

Perfect complement to photovoltaic systems

The EJK maxi MR ST heating cartridges were specifically designed to complement existing photovoltaic systems. Manual power adjustment allows users to optimally balance the consumption of generated solar energy and ensure that excess electricity is used wisely. The system's flexibility makes it possible to make the entire heating system more efficient while reducing dependence on external power sources.

Versatile applications

These heating cartridges are suitable for water heating in both open and closed metal tanks, as well as in enameled domestic hot water storage tanks. They can also be easily used in buffer tanks without an internal coating. A corrosion-protected design with magnesium or impressed current anodes ensures that the heating element withstands electrical potential differences, thus guaranteeing a long service life.

Thanks to their versatility, the heating cartridges of the EJK maxi MR ST series are also used in MDC heating modules from ZUG Elektromet and can be easily integrated into central heating systems.

Robust materials and durable construction

The heating elements of the cartridge heaters are housed in a specially designed metal head and are made of robust stainless steel alloys. These materials offer high resistance to corrosion and wear, even in contact with feed or buffer tank water. A grounding concept also ensures compatibility with cathodic protection systems, providing long-term protection for both the cartridge heater and the tank.

The innovative design of these heating cartridges is characterized by careful engineering that ensures the electrochemical protection of the system. This increases both corrosion resistance and extends the service life of the installed magnesium anodes.

Technical data of the heating cartridge

• Power: 6 kW
• Connection voltage: 400 V
• Non-heated area: 100 mm
• Immersion length to seal: 520 mm
• Threaded connection: 1 1/2"
• Minimum storage volume: 100 dm³

Technical data of the modular contactor

• Rated current: 25 A
• Rated voltage: 234/400 V
• Insulation voltage: 500 V
• Number of current paths: 4
• Coil supply: 230 V
• Width: 2 modules

Technical data of the 3-stage cam switch

• Pitch angle: 45°/90°
• Rated current: 16 A
• Insulation voltage: 690 V
• Frequency: 50 Hz
• Surge voltage: 6 kV
• Making capacity: 0.7 kA
• Rated short-time current: 0.5 kA
• Protection class: IP65

Conclusion: Efficiency meets flexibility

The EJK maxi MR ST series of cartridge heaters offers a reliable, versatile, and efficient solution for water heating in a wide variety of applications. Combined with photovoltaic systems and heat pumps, they enable optimal use of renewable energy. Thanks to robust materials, innovative features such as power regulation, and their sophisticated design, these cartridge heaters are an investment in sustainability and long-term efficiency.

Scope of delivery

• 1 x 6 kW modular heating element
• Assembly instructions

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• Operating instructions