FRESH WATER STATION
FW-D 40

Characteristics

• High-efficiency pump: PWM-controlled for demand-based heating.
• Sanitary circuit control valves: High-quality valves for precise control of water flow.
• Outlets at the top: All drinking water outlets are located at the top for easy installation.
• Sturdy construction: Installation frame made of galvanized sheet steel for durability and stability.
• Fitting piece for meter: For easy integration of a water meter.
• Variable return stratification: Optimizes buffer storage stratification and return temperatures.
• Cascade capable: To enable higher performance, it can be operated in cascade mode.
• Incl. safety valve (cold water connection)

Application: The FW-D 40 fresh water station heats drinking water centrally and distributes it to the tapping points via the hot water pipe. Operation based on the flow principle means that the hot drinking water is heated "just in time" only when needed, so there is no need for storage. A buffer tank is required to provide a sufficient volume flow of heating water.

Hot water preparation: The drinking water is only heated when needed via a stainless steel plate heat exchanger. The design of the heat exchanger enables high tap capacities and a low return temperature to the buffer tank.

High-efficiency pump: The integrated PWM-controlled high-efficiency pump ensures precise and demand-based control of the heating water flow rate. It operates quietly and energy-efficiently, ensuring a constant hot water temperature.

Control: The central control unit is the electronic control system. This ensures a constant domestic hot water temperature.

Sensors: Modern sensors enable fast and precise control processes. A flow sensor based on the vortex principle determines the flow rate and hot water temperature. Accurate and fast-responding PT-1000 temperature sensors measure the temperatures of the heating return, cold water, buffer tank flow and circulation return.

Variable return stratification: The heating return flow to the buffer tank is variably stratified by an integrated 3-way switching valve. At higher return temperatures, e.g. due to prolonged circulation operation without tapping, stratification takes place in the middle of the buffer tank. In normal operation, for example during tapping with very low return temperatures, the return is stratified in the lower part of the buffer tank. This maintains the temperature stratification in the buffer tank and preserves the low return temperatures in the lower part, which are necessary for solar yield.

Circulation: A high-efficiency drinking water circulation pump is intelligently controlled (by pulse, time, and temperature) and speed-controlled by the electronic control system.