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Reclaiming fuel tax [Germany]
In Germany, it is possible to reclaim the energy tax for
gas used to operate the fuel cell module. This is done
by submitting a request for an energy tax refund to the
customs office. The previously paid energy tax will
then be refunded in part.
Mixer
Hot heating water from the heat generator is mixed
with cooled heating water from the heating circuit. The
heating water, thus brought to the required tempera-
ture, is pumped to the heating circuit by the heating cir-
cuit pump. The control unit adjusts the flow tempera-
ture via the mixer to suit different conditions, e.g.
changing outside temperatures.
Mains monitor (ENS)
Mains monitoring facility with associated switching
devices. This is used to disconnect generating sys-
tems from the grid in case of a power failure or mains
fault.
This both protects the system and prevents undesired
export to the grid (e.g. to protect individuals and prop-
erty when a fuse/MCB responds).
Ecological operation
See "Energy manager".
Economical operation
See "Energy manager".
Open flue operation
The combustion air is drawn from the room where the
heat generator is installed. Open flue operation is not
permissible with Vitovalor PA2.
Room sealed operation
The combustion air is drawn from outside the building.
Safety valve
Safety equipment that must be installed in the cold
water pipe by your contractor. The safety valve opens
automatically to prevent excess pressure in the DHW
cylinder.
Cylinder loading pump
Circulation pump for heating the water inside the DHW
cylinder
Appendix
Terminology (cont.)
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38


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