Fresh Hydro Unit


The Series FSK100 are designed for potable water applications. Equipped with unique hydro block, quick mixing actuator, two pass plate heat exchangers and intelligent controller the FSK100 series are one of a kind. These high sophisticated appliances provide outstanding potable water performance and temperature stability. The FSK100 series set a new standard on fresh hydro units market.

  • All time fresh, vital and hygienic hot water in the demanded volume
  • High tap rates
  • Fast reaction times
  • Lowest calcification risk
  • Legionella flushing function

Product range

FSK101 front_B-01
FSK101 side_B-01
Series FSK101
Art.no.ReferencePumpConnection AConnection BConnection CConnection DConnection EConnection FG mmH mmI mmWeight kgNoteNTCNTC = National Trade Code
64000100FSK101Wilo 25/7.0G 1"G 1"G 1"G 1"G ½"G ½"60040030420,0  

Installation support

Installation examples
Fresh Hydro Unit
Fresh Hydro Unit with accessories

Technical data

Suitable application area
  • Potable water
Technical data
FHU in general Tap performance:  40 l/min - at 70°C primary 
Tap performance:  40 l/min - at 45°C outlet secondary 
Plate heat exchanger (plates): 41 
Insulation: EPP 
Weight: 20.0 kg
Connection - Cold water (A): Internal thread G1", ISO 228/1 
Connection - Warm water (B): Internal thread G1", ISO 228/1 
Connection - Storage tank (C): External thread G1", ISO 228/1 
Connection - Storage tank (D): External thread G1", ISO 228/1 
Connection - Circulation (E): External thread G½", ISO 228/1 
Connection - Flush connection (F): External thread G½", ISO 228/1 
Media temperature: max. 95°C 
Media temperature: min. 2°C 
Media,  Heating water (in accordance with VDI2035) 
Media - Water/Glycol mixtures, max. 50 %
(above 20% admixture, the pump data must be checked)  
Media - Water/Ethanol mixtures, max. 28 %
Working pressure, Potable water: 1 MPa
Working pressure, Heating: 300 kPa
Primary pump Type: Wilo-PARA HU25/7-50 iPWM 
Power supply: 1∼230 V +10%/-15%, 50/60 Hz 
Speed: 700 - 4700 rpm
Power consumption: 1,8 - 50 W
Current, nominal: 0,02 - 0,43 A
EEI (Energy Efficiency Index): ≤0,20 
3-way mixing valve SLB239 Type: ESBE SLB239 
Power supply: 12 ± 15% V DC
Power consumption, standby: 0,6 W
Current, peak: 0,8 A
optional Circulation pump Type: Xylem E3‒00‒3/000 BRU 
Power supply: 230 V, 50Hz 
Power consumption: 8 W
Current, nominal: < 0.1 A
Conformity CE_A-01
LVD 2014/35/EU
EMC 2014/30/EU
RoHS 2011/65/EU
Dimensioning $name
Dimensioning guide - Please see data sheet

Accessories and spare parts

ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual


ESBE Circulation pump FSK803 for Fresh Hydro Unit FSK101
64020100FSK803Circulation pump  
Spare parts
ImageArt.no.ReferenceDesignationNational trade codeNoteData sheetInstructions manual


ESBE FSK908 Plate heat exchanger PBU11/41.
64040100FSK908Plate heat exchanger PBU11/41    


ESBE FSK901 Pump Wilo Yonos PARA HU 25/7.0.
64040200FSK901Pump Wilo Yonos PARA HU 25/7.0    


ESBE FSK907 Controller, Hydro Control.
64040300FSK907Controller, Hydro Control    


ESBE FSK904 Sealing set.
64040400FSK904Sealing set    


ESBE FSK905 Sensor Grundfos.
64040500FSK905Sensor Grundfos    


ESBE FSK906 Exchange kit.
64040600FSK906Exchange kit   


ESBE FSK909 PT1000 sensor.
64040700FSK909PT1000 sensor    

Download area

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Data sheet FSK100
Installation instruction FSK100
2D Image FSK100
3D drawing (stp file) FSK101