4000003077/00/02.2021
12
5 Installation
5.1 Installation site
The PV AC combiner boxes are suitable for protected
outdoor installation. Regard the following aspects when se-
lecting the installation site:
– The location must be protected from the weather and
direct sunlight.
– The location must be easily accessible for installation
work and maintenance work.
– The installation site must not be in close proximity to
easily inflammable materials, gases or vapours.
– The combiner box must be positioned as described in
the following section or in other position ensuring the
needed requirements.
– It must be ensured that unauthorised personnel cannot
access the combiner box.
– The installation area must be stable enough to enable
installation and maintenance work safely.
– The combiner box and especially the feeder conductors
must be installed in such a way that damage cannot be
caused by rodents.
– Regard the permissible ambient conditions:
– The temperature range is indicated on the label inside
the box.
– The relative humidity may temporarily be as high as
100 % at a maximum temperature of +25 °C.
–
Ensure that no object is blocking the pressure compen
-
sation elements.
– When installing, ensure rain cannot penetrate the com-
biner box.
Exposure to direct sunlight and direct rain for
extended periods and excessively high or low
temperatures can result in a shorter lifetime or
damage to the internal components of the com-
biner box.
To protect the combiner box against direct sun-
light and rain, you can install it under the pho-
tovoltaic modules or a protective canopy.
Make
sure there is enough air circulation around the
equipment
Figure 5.1 Installation under the PV modules
5.2 Positioning of the combiner box
The PV AC combiner boxes are designed to be installed
vertically with the cable glands or connectors leading down.
Merely a positive inclination from 15º to 90º is allowed.
90°
Figure 5.2 Installation in upright vertical position
The combiner box must not be installed horizon-
tally laying flat on the rear neither in any other
orientation.
5.3 Fixation
The fixation of the combiner box directly affects
the proper performance and the lifetime of the
product.
Ensure that the requirements described in chap-
ters 5.1 and 5.2 will also be observed.
Mounting material
Most of the Weidmüller combiner boxes are supplied with
metal or plastic mounting lugs, depending on the model.
Fixation screws are not delivered as standard with each
product.
Please make sure all needed material is available
before starting the installation.
Requirements
The PV AC
combiner box shall be fixed to a suitable and
stable metallic structure or a wall that will support the
weight of the combiner box during the entire lifetime.
Always use all fixations that are supplied with the combiner
box.
In case the installation is done on a pedestal, the combiner
box
should be fixed on the top of it with the specific
sup-
plied accessories.
