Vitosolic 200 SD4 Solar Control Unit

Description

Viessmann Vitosolic 200 SD4 Electronic temperature differential control unit

for up to 4 energy consumers for systems with dual mode DHW heating or dual mode DHW and swimming pool water heating or space heating backup using solar panels and oil-/gas-fired boilers.

With digital temperature display, energy meter, reloading suppression for the boiler, heating-up of the pre-heat stage and diagnostic system.

For wall mounting.

With optional connection of solar cell.

Construction

The control unit comprises:
■ PCB
■ LCD
■ Selector keys
■ Terminals:
– Sensors
– Solar cell
– Pumps
– Pulse counter input for connection of flow meters
– KM BUS
– Central fault message facility
– V BUS for large display
– Power supply (on-site ON/OFF switch)
■ PWM outputs for controlling the solar circuit pumps
■ Relay for actuating the pumps and valves

The standard delivery includes collector temperature sensor, cylinder temperature sensor and temperature sensor (swimming pool water/heating water buffer cylinder).

Functions

■ Switching the solar circuit pumps for DHW and/or swimming pool heating or other consumers
■ Electronic limiter for the temperature in the DHW cylinder (safety shutdown at 90 °C)
■ Collector safety shutdown
■ DHW and swimming pool heating:
DHW heating can be set as a priority. When the swimming pool water is heated (consumer with the lower set temperature), the circulation pump will be switched OFF in accordance with a timer, to establish whether the DHW cylinder (consumer with the higher set temperature) can be reheated. The system continues to heat the swimming pool water, if the DHW cylinder is being heated or if the temperature of the heat transfer medium is insufficient to heat it up.
■ DHW heating and central heating with a heating water buffer cylinder:
The buffer cylinder water is heated by solar energy. The DHW water is heated by the buffer cylinder water. When the temperature inside the heating water buffer cylinder exceeds the heating return temperature by the set value, a 3-way valve is actuated and the heating return water is routed via the heating water buffer cylinder to the boiler to raise the return temperature.

Rated voltage 230 V ~. Rated frequency 50 Hz
Rated current 6 A
Power consumption 6 W (in standby mode 0.9 W)
Safety category II
IP rating IP 20 to EN 60529, ensure through design/installation
Mode of operation Type 1B to EN 60730-1.

Permissible ambient temperature
– During operation 0 to +40°C use in the living space or boiler room (standard
ambient conditions)
– During storage and transport −20 to +65°C
Rated relay output breaking capacity
– Semi-conductor relay 1 to 6 0.8 A
– Relay 7 4(2) A, 230 V~
– Total max. 6 A