Installation Sequence Information On The Modules; Information On The Mounting Frame; Electrical Connection; General Information - Viessmann Vitovolt 300 Installation And Service Instructions Manual

Installation sequence
Information on the modules
Inappropriate handling can damage the modules.
■
Never lift the modules by their sockets or connecting
cables (at the back of the module).
■ Treat the modules like a product made of glass:
Never bend, stand on or place objects on the mod-
ules.
Never use paint, adhesive or sharp objects on the
■
back of the modules.
■ Never dismantle modules or remove labels. Prior to
installation, check the connection components for
possible damage.
Failure to observe these instructions will void the
guarantee and warranty.
Modules with damaged glass (e.g. scratches or
■
paint) or a damaged back panel should not be
repaired and must not be installed.
The surface of the frame may only be scratched
where the earth connection is made.

Information on the mounting frame

■ The correct selection is the responsibility of the
design engineer.
■ Use only fixing materials and connecting cables that
are suitable for use with photovoltaic systems.
■ The mounting frame must be made from corrosion
and UV-resistant material.
When selecting materials, take their electrochemical
potential series into account.
■ The roof structure must be suitable for the installa-
tion.
To prevent any risk of water intrusion, seal roof pene-
trations.

Electrical connection

General information

■ Observe VDEW guidelines and the technical connec-
tion requirements of the grid operator.
■ Under operating conditions, a PV module may
deliver a higher current and/or a higher voltage than
stated for the standardised test conditions. The val-
ues of Isc and Uoc specified on the module should
therefore be multiplied by a factor of 1.25 to deter-
mine the rated voltage of components, the rated cur-
rent of conductors, the size of fuses and the ratings
of control units that are connected to the output of
PV modules.
Danger
■
Contact with live module parts, e.g. terminals,
can lead to burns and electric shock, even if
the modules are not connected.
Cover modules with an opaque material during
installation.
6
Modules that are not installed:
■
Store modules with the glass facing up and cover
them.
■ Never use anything to amplify the sunlight, e.g. mir-
rors, in order to affect insolation.
Fixing clamps must not come into contact with the
■
glass, bend the frame or create shade over the cells.
For ventilating and cooling the modules, maintain a
■
clearance of 50 to 100 mm between the modules
and the installation surface.
■ To compensate for the minor thermal module expan-
sion, maintain a clearance of approx. 5 mm between
the modules.
All contacts and tools used must be clean and dry.
■
■ The modules must not be subjected to stress due to
thermal expansion of the mounting frame/module
frame or due to high snow and wind loads.
■ Fit the mounting frame so that the modules will not
be shaded.
■ Do not subject connecting cables to direct insolation.
Ensure that cable connections are waterproof. Route
connecting cables along the mounting frame below
the modules (tie up).
To prevent bimetallic corrosion, the fixing elements
■
must be compatible with the materials used in the
mounting frame.
■ Never use modules with different electrical parame-
ters in a single system.
■ Series connection:
Modules can be connected in series to increase the
voltage. To do this, the positive terminal of one mod-
ule is connected to the negative terminal of the next
module. With series connection, the total voltage is
the sum of the individual module voltages. The total
open circuit voltage of the system must not exceed
the specified maximum system voltage of the mod-
ule.