Strasshofer GmbH

fresh water station


Item number 40501

01.01.1970

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Fresh water station - Drinking water station

Application
The fresh water station is used for domestic hot water heating in connection with a buffer tank. This control regulates the set tapping temperature (e.g. 46°) independently of the buffer storage temperature, which can be up to 95°C. The temperature of the buffer storage tank can also be adjusted.

Hot water preparation:
The drinking water is only heated in the flow-through principle via a stainless steel plate heat exchanger when it is needed, e.g. when you let it run out of the tap. The electronic control ensures a constant hot water temperature, regardless of the buffer temperature, the quantities withdrawn or the tapping intervals.

Sensors:

  • Fast and very accurate control processes are made possible by the use of state-of-the-art sensors.
  • A flow sensor based on the vortex principle determines the flow rate.
  • Accurate and fast reacting temperature sensors detect the temperatures of: Hot water, cold water and buffer flow.

The recorded signals are processed by the control system and the circulation pump is controlled accordingly (speed control).

Additional module:

A circulation pump can be controlled by the electronic control (according to pulse, time and temperature): We offer these to you at the price of 249,--€.

Advantages of heating the water with this method:

  • Only as much water as is needed is heated. The remaining solar energy from the buffer tank is used to support the heating system.
  • In this system, no Legionella can form in the water, as no warm water is heated up for storage.
  • With the fresh water station a very good temperature stratification is achieved, as the warmest water is taken from the highest point in the buffer tank - see picture below. The fresh water station takes e.g. 65° C warm water, the tap temperature is set to 46°. No matter how different the tapping capacities (= quantity of water taken e.g. via tap) are, e.g. 10l, 20l, 30l and 40l, the control regulates that the tapping temperature remains constant at approx. 46° C. The tapping temperature is controlled by the control unit. The return temperature to the buffer tank is approx. 18-20° C with a cold water inlet of approx. 10°, whereby a very good stratification is achieved.
  • Compared to a combination cylinder, up to 30% less energy is required for hot water preparation if no solar energy is available.
  • When solar energy is available, the storage tank can be heated up to 95°C without it calcifying quickly, as with a combination storage tank, because dead water remains in the storage tank. This means that 30 % more solar energy can also be absorbed here.

Guy: FW-E 40
Order no. 1610001
primary
buffer
Secondary
drinking water
pressure stage PN 6 PN 10
Max. Temperature: 110°C 75°C
Connection dimensions: DN25 DN20
Thread: 1" IG 1" AG
Size (WxHxD): 485x685x200 mm

Performance data:
primary
buffer
Secondary
drinking water
Hot water output: 100 KW 100 KW
Flow Primary: 1743 l/h
Flow temperature: 75°C 65°C
Return flow temperature: 20°C 20°C
KW / WW Temperature: 10°C/60°C 10°C/45°C
Loading capacity: 32.4 l/min 39.2 l/min