Samlex America PR-3030 - Manual (Page 6)

6 739.704 | 11.10
5.2 Connecting the controller
Solar modules generate electricity under incident light. The full
voltage is present, even when the incident light levels are low. You
should therefore work carefully and avoid creating sparks. Observe
the appropriate safety precautions.
Double the normal system voltages can be present during
installation and electrical connection of the DC side of the
photovoltaic system (up to 24 V in a 12 V system and up to 48 V in
a 24 V system). It is always a good idea to cover the solar modules.
When laying cables, ensure that no damage occurs to any of the
constructional fire safety measures present in the building. The
controller must not be installed or operated in wet rooms
(e.g. bathrooms) or in rooms where inflammable gases may
generate, e.g. from gas bottles, paint, varnish, solvents, etc. Do not
store any of the mentioned materials in rooms where solar
controllers are installed!
Connect the individual components to the connection with the correspond-
ing symbols.
Important! The battery can be damaged when the connection
cable is short circuited. Install a fuse in the battery connection
cable to protect the battery.
Observe the following connection sequence when commissioning the
system:
1. Connect the battery to the charge controller – plus and minus.
2. Connect the photovoltaic modules to the charge controller – plus and
minus.
3. Connect the load to the charge controller – plus and minus.
Follow the reverse procedure when uninstalling!
Note: If you do not follow the correct connection sequence, automatic
adjustment for 12 V / 24 V systems will not work correctly and the bat-
tery can be damaged!
5.3 Grounding
When constructing a stand-alone solar energy system, from a technical
point of view the controller does not necessary need to be grounded.
However, be sure to always observe the applicable respective national regu-
lations regarding grounding. All positive connections can be grounded but
with negative grounding only one connection can be grounded.
Caution
Danger of damage to the controller. Make sure that no
common connection exists for the Module Minus, Battery
Minus and Load Minus connections, e.g. via a ground
connection.
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