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3. Functional description
The electronically controlled fresh water station provides several residential units with fresh domestic hot water. The energy is supplied by a heating water
buffer tank. Drawing domestic hot water from the tank triggers the heating pump. The domestic water is heated by a stainless steel heat exchanger
according to the continuous flow principle. The speed regulation on the primary pump keeps the set hot water outlet temperature constant. The primary
mixer reduces very high heating medium temperatures, thus shifting them into the normal control range of the primary pump. Low heating medium tem-
peratures also prevent the accumulation of limescale in the plate heat exchanger. The circulation pump makes it possible to recirculate the domestic water
constantly or according to an automatic timer.
The benefits:
•
Hot water preparation on demand
•
Low return temperature of the heating water (depending on the design)
•
No hot water storage, which considerably reduces the growth of legionella
3.1 Installation example
Hydraulic integration based on an example with a heating water buffer tank and solar system: No feeder pump may be installed unless it has been
hydraulically decoupled. The primary pump takes the heating medium from the buffer.
Residential unit 4
Solar
Boiler
Buffer tank
Supply line buffer
LogoFresh
XL-Line
station
Return line buffer
Domestic hot wat
er
Z
Cold wat
er
Residential unit 1
Residential unit 2
Residential unit 3
Cold
water
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EN
