Product Overview & Application Area
The GEMA MDC PLUS 400 Bundle Module + Heating Element WEHP9 9.0 kW 400 V is an electric auxiliary heating module for central heating systems and is integrated into the heating circuit as an additional heat source. It is suitable for supporting the heating of heating water when an existing primary heat source is to be supplemented, frost protection is to be supported, or electrical energy is to be specifically converted into heat.
The bundle combines the MDC PLUS 400 heating module with the matching WEHP9 electric heating cartridge with 9.0 kW output for operation at 400 V. This version is the most powerful variant within the documented MDC series and is suitable for applications where high electrical auxiliary output is required in the heating circuit.
Technology & Equipment
The MDC PLUS 400 is designed as an electric heating module for central heating systems. The steel tank is made of raw steel on the inside, powder-coated on the outside, and provided with 50 mm thick polyurethane foam thermal insulation. The outer cladding is made of plastic, and the lid is made of ABS plastic.
The WEHP9 heating cartridge included in the bundle operates with 3~400 V three-phase current. It features stepless temperature adjustment, indicator lights for power connection and heating operation, as well as a non-self-resetting safety temperature limiter. The heating module is intended for use with water or a suitable glycol mixture up to a maximum concentration of 50 percent.
Everyday Benefits
The bundle offers a compact way to introduce additional electric heat directly into the heating circuit. This allows an existing heating system to be flexibly supported without requiring a separate heat generator with fuel storage.
The 9.0 kW version is suitable for systems where high electrical auxiliary output is required. In conjunction with proper hydraulic integration and suitable control, the heating module can be used for auxiliary heating, frost protection, or excess electricity concepts.
System Integration & Compatibility
The MDC PLUS 400 is integrated into a parallel heating circuit on the flow or return line of the main heat source. For proper operation, an additional circulation pump is required to ensure the necessary minimum flow through the heating module.
Integration can be carried out in open or closed central heating systems, provided the appropriate safety devices are in place. A safety valve with a suitable opening pressure as well as proper electrical protection and control connection must be provided on-site.
Technical data at a glance
The following information refers to the bundle consisting of the MDC PLUS 400 heating module and the WEHP9 electric heating cartridge.
| Nominal power | 9.0 kW |
| Energy source | Electricity |
| Voltage | 400 V |
| Phases | 3-phase |
| Power consumption | 9,000 W |
| Minimum flow rate | 514 l/h |
| Control current heating cartridge | 13.0 A |
| Max. operating pressure | 10 bar / 1.0 MPa |
| Max. operating temperature MDC | 90 °C |
| Max. temperature setting heating cartridge | approx. 70 °C |
| Connection size heating module | Female thread G 1 1/4 inch |
| Connection thread heating cartridge | 1 1/2 inch |
| Installation length heating cartridge | 720 mm |
| Unheated area | 100 mm |
| Device length MDC PLUS 400 | 850 mm |
| Heating module material | Steel tank, raw steel inside, powder-coated outside |
| Insulation | 50 mm polyurethane foam |
Installation
Installation of the heating module, hydraulic connection, and electrical testing must be carried out by qualified professionals. The MDC PLUS 400 is integrated into the heating circuit and may only be operated after the system has been completely filled, vented, and checked for leaks.
For the 9.0 kW version, a minimum flow rate of 514 l/h must be ensured in the central heating system. The additional circulation pump must be designed so that it works together with the heating cartridge and reliably dissipates the heat from the module.
Notes
The heating module must not be operated dry. The safety valve, venting, minimum flow rate, electrical protection, and control connection must be checked before commissioning. No shut-off valves may be installed between the safety valve and the heating module.
When using photovoltaic surplus, a suitable external controller or switching logic is required. The heating module itself does not replace system planning, heat load calculation, or professional electrical sizing.
Scope of delivery
- 1 x GEMA MDC PLUS 400 heating module
- 1 x WEHP9 electric heating cartridge 9.0 kW 400 V according to bundle version
