Internal Extension H1

PCB for installation in the control unit. Using the extension allows the following functions to be achieved:

• Connection of an external safety solenoid valve (LPG) or, alternatively, one of the following functions:
• Connection of a DHW circulation pump (only with Vitotronic 200)
• Connection of a heating circuit pump (stepped) for a directly connected heating circuit
• Connection of a central fault message facility
• Connection of a circulation pump for cylinder heating

Note: Not compatible with Vitodens 200-W EM Plusbus