Electrical Connection - fothermo PVB-10 Montage-, Betriebs- Und Wartungsanleitung

• Warning! The running water can be hot – risk of
scalding. These steps do not ensure complete
drainage of the water tank.
IMPORTANT! When emptying the water tank, consider
all necessary precautions to avoid damage caused by
the drained water.
IMPORTANT! In Denmark, Sweden, Norway and
Finland, the connection of the water heater to the
public water supply may only be performed using a
suitable pressure reducing valve. The local regulations
must be observed.

ELECTRICAL CONNECTION

WARNING! The electrical connection may only be
performed when the water heater is filled with water.
IMPORTANT! The water heater is powered by direct
current. The water heater is protected against electric
shock "class ІII" and may only be supplied with safety
extra-low voltage (SELV). Only power sources recom-
mended by the manufacturer may be connected. A
faulty and/or unsuitable power supply involves a high
risk and is likely to cause an accident.
cables of the device must be replaced if they are
damaged.
IMPORTANT! Photovoltaic modules may ONLY be
connected in parallel. When connecting more than one
photovoltaic module, always use a suitable connector
for parallel connection. For more information, refer to
the illustration "Parallel PV-Connector". Connecting
photovoltaic modules in series will damage the water
heater.
Parallel PV-Connector
Connection of PV-modules in parallel configuration only!
Serial connection will damage the unit!
The electrical connection of the water heaters is
performed using the factory supplied MC4 plugs. Check
the functionality of the appliance after the electrical
6
The connection
Pay attention to correct polar-
ity when connecting!
PVB-10, PVB-30, PVB-80
EN
connection has been performed. When all supply
connections are removed, the water heater is com-
pletely disconnected from the power sources.
CONNECTION OF PV-MODULES:
IMPORTANT! The installation and electrical parallel
connection of PV modules may only be carried out by a
qualified person and may not endanger third parties.
When installing the photovoltaic modules, the locally
prevailing rules and laws must be complied with.
IMPORTANT! Keep cables out of the way to avoid
tripping over them or getting caught. There is a risk of
injury. The cables must be fastened in such a way that
no tensile load is applied to the connectors.
Furthermore, it must be ruled out that the cables and
connectors rub against surfaces and edges (e.g. in
wind). The cables must not lie in water permanently.
IMPORTANT! Only photovoltaic modules with a
maximum of 60 cells and an open-circuit voltage of
42.4 V may be connected.
• Photovoltaic modules must be connected
correctly using the factory supplied MC4 plugs.
• You may connect up to 5x 60-cell modules in
parallel. Depending on the module, this corres-
ponds to an MPP output of approximately
1500 W .
p
Dimensioning of the required photovoltaic power:
• The higher the number of hours of sunshine per
day, the smaller the required PV power.
• The warmer the water taken from the pipeline,
the lower the required PV power.
• Dimension the required photovoltaic power
according to the months with the lowest solar
radiation in which the photovoltaic water heater
will be in operation.
• The greater the amount of hot water consumed
per day, the larger the PV power required.
The following table serves as a guideline for dimen-
sioning the photovoltaic power needed depending on
the climatic conditions:
Climatic conditions
Countries with low
sunshine e.g. Northern
and Central Europe
Sunny countries
e.g. Southern Europe
and Africa
These values given are guidelines. Depending on the conditions
prevailing on site and the specific conditions of consumption, the
appropriate design of the photovoltaic output may vary from the
values described.
PVB-10 PVB-30 PVB-80
300 W 600 W 1200 W
p p p
150 W 300 W 600 W
p p p
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