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Installation Manual
SMA Solar Technology AG
DC-CMB-IA-U15-xx-en
5 Assembly
5.1 Wall Mounting
5.1.1 Selecting the Mounting Location
Fire hazard due to wrong choice of mounting location
Under fault conditions electric arcs may occur in the SMA String-Combiner. Electric arcs can cause fires if the SMA
String-Combiner is mounted on flammable materials.
• Do not mount the SMA String-Combiner on flammable construction materials.
• Do not mount the SMA String-Combiner near highly flammable materials.
• Do not mount the SMA String-Combiner in potentially explosive atmospheres.
Requirements for the mounting location:
o The mounting location must not be in a living or office area.
o The mounting location must not block any escape routes.
o The mounting location must be freely and safely accessible at all times without the necessity for any auxiliary
equipment (such as scaffolding or lifting platforms). Non-fulfillment of these criteria may restrict servicing.
o The mounting location must be suitable for the weight and dimensions of the Combiner Box.
o The mounting location must not be exposed to direct solar irradiation.
Requirements for mounting:
o Mount the Combiner Box in such a way that the connection area is facing downwards.
o Do not mount the Combiner Box in a horizontal or inclined position.
o An external cable support rail must be provided.
Example: Mounting the Combiner Box
If the PV array is mounted on a free-standing structure, the
Combiner Box can be fixed to this structure in a shaded
position. Make sure that the Combiner Box enclosure is not
mounted in the path of rainwater flowing off the module
surface.
Figure 5
5 Assembly
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