Frischwasser-Modul FriWa für die Trinkwasser-Erwärmung nach ...

Carry on the filling and purging until it can be guaranteed that the system is completely deaerated!
Any audible flow sounds during the operation of the circulation pump(s) are evidence to that fact that
there still remains air in the system.
Setting up the wanted potable water temperature
The wanted (max.) hot water temperature is set up on the controller (see user’s manual for the
controller, menu „EINSTELLWERTE“).
In order to rule out the danger of scalds on the water tap, the maximum water temperature should
never exeed 60°C. Already at 52°C a steadily germfree water preparation is warranted. The
necessary temperature on the primary side (inside the buffer storage) depends on the wanted (max.)
hot water temperature as well as on the quantity needed. The temperature inside the buffer storage
has to be at least 5K higher that the wanted hot water temperature! The coefficients mentioned in
the following chart can serve as indications.
Tap potential / max. tap quantity / extraction power
The tap potential [l/min] depends on the hot water temperature set up on the controller and the
temperature available in the storage.
The maximum volume flow of potable water for the FriwWa module is 40 l/min!
The max. tap quantities mentioned below can be extractesd at once if the upper 200 l of the buffer
storage are entirely heated to the required temperature. A further (post-) heating of the storage
during the extraction was not taken into consideration.
The extraction power is necessary in order to heat up the water quantity of the tap potential
[l/min] from 10°C to 45°C.
storage
temperature
50 °C
60 °C
70 °C
80 °C
hot water
temperature
set up on
the
controller
tap potential at 45°C
(on the water tap)
max. tap quantity
(on the water tap)
at 200 l inside the
storage with storage
temperature
extraction
power
45 °C 20,5 l/min 155 l 50 kW
55 °C - / - - / - - / -
45 °C 31,7 l/min 240 l 77 kW
55 °C 23,7 l/min 180 l 61 kW
45 °C 40,0 l/min 310 l 99 kW
55 °C 35,4 l/min 265 l 90 kW
45 °C 40,0 l/min 370 l 99 kW
55 °C 44,7 l/min 335 l 114 kW
Circulation operation (optional)
The fresh water module is (optionally) provided with a circulation pump. The circulation pump can be
retrofitted (while doing this, the paragraphs “Wall fastening, Connexion Diagram, Electrotechnical
Connexion and Commissioning” have to be taken into consideration in particular).
For the operatoin of the circulation pump, 3 possible modes of operation can be chosen on the
controller (see also the user’s manual for the controller, menu “OPTIONEN”):
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