KYOCERA Assembly and Maintenance Instructions, November 2014
4.4
Mounting the solar module
Please observe the following during assembly:
•
A clearance of at least 50 mm needs to be kept be-
tween the module frame and the attachment surface.
This allows the cool ambient air to circulate below the
solar module. This is necessary for optimum perfor-
mance in all application ranges.
•
There should be a clearance of at least 3.2 mm be-
tween the individual module frames to allow heat-
related expansion.
•
The solar modules can be installed in either portrait or
landscape position.
•
If high accumulations of snow on the module array oc-
cur on site, the lower part of the module frames could
be damaged when slipping snow is piled up there.
This kind of damage needs to be avoided by an ap-
propriate countermeasure e. g. attaching support parts
at the lower side frames of the modules.
•
When selecting the material for the support structure,
pay attention to the electrochemical series in order to
avoid galvanic corrosion between different kinds of
metal.
•
Fasten modules firmly to a support structure designed
to withstand the local wind and snow loads
•
The glass surface may have color variations depend-
ing on the viewing angle or installation circumstance.
This is a normal characteristic of the glass and doesn't
affect the quality of the solar module. Do not touch the
glass surface with bare hand to avoid contamination.
Clean the glass surface with a soft wet cloth without
detergent if it is contaminated with oil or fingerprints.
Do not rub the glass surface with something hard like
a metal or sharp edge.
4.4.1
Bolting
Assembly material
•
Stainless steel screws, diameter 8 mm (4 units)
•
Screw body length is 25.4mm or less.
•
Nuts with locking teeth (4 units)
NOTE
No holes may be drilled into the module frame.
Procedure
Please see the drawing in Appendix 1 of these
instructions for the positions of the mounting holes.
Drill the required assembly holes to the support struc-
ture.
Tighten the screws with adequate torque (usually 12.5
Nm) to securely attach the solar module to the sup-
porting frame. As adequate torque figure depends on
selected bolt nuts, follow the manufacturers' recom-
mended numbers.
4.4.2
Clamps
Assembly material
•
Rustproof module clamps (at least 4 units).
•
Please observe the information provided by the
manufacturer when selecting the clamps.
Installation with long side of frame
-must be at least 24mm long respectively.
-must overlap the module frame by at least 5mm.
NOTE
The module clamps or insertion system
- must not bend the module frame.
- must not touch the front glass.
- must not cast a shadow on the front glass.
- must not damage the surface of the frame.
Procedure
Define the positions of the clamps based on the draw-
ings in
Appendix 2
.
Tighten the module clamps to the torque stated by the
clamp manufacturer.
Fasten modules firmly by clamps designed to with-
stand the local wind and snow loads.
5
Electrical connection
5.1
Safety information relating to the electrical
connection
5.2
Wiring of the solar modules
NOTE
The maximum system voltage of solar modules connected to
each other may not exceed 1000 VDC. When designing the
system, please note that the module voltage increases when
the temperatures are low. Do not connect the modules in
parallel without max. over current protection.
Under normal conditions, solar modules can supply higher
currents and/or a higher voltage than reported at the standard
test conditions
(see chapter 2.3 “Technical Data”)
. There-
fore, when determining component voltage ratings, conductor
current ratings, fuse sizes, and the size of controls connected
to the output of the solar modules, the stipulated values of I
SC
and V
oc
should be multiplied with a factor of 1.25.
Only interconnect modules of the same type within a system.
The solar modules are equipped ex-works with 4 mm
2
-solar
cables. The solar cables have SMK R51-7/P51-7 connectors.
These connectors are designed for series wiring only. Always
use special solar cables with a minimum conductor size of 4
mm² and suitable PV-connectors for further series or parallel
wiring.
When wiring, proceed as follows:
•
Ensure the poles are connected correctly and that the
plugs are connected properly without gaps
•
Observe the minimum bending radius of 24.5 mm of
the solar cables that are used.
Only specially trained and qualified personnel
may make the electrical connection.
Hazard!
Potentially fatal risk if live parts are touched.
•
Never disconnect or connect electrical con-
tacts when under load.
•
Only use dry, insulated tools for the electrical
assembly work.
•
Never touch live parts with bare hands.
•
Cover the solar module during installation with
opaque foils or materials.
•
Do not wear any metal jewellery.
