CHAPTER 6
INSTALLATION
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NOTE
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CAUTION
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SilentBox® SB EC ... EC Centrifugal Fan Boxes
Installation and Operating Instructions
All of the following information and instructions are intended solely for
authorised electricians!
6.0 Scope of delivery/Design
The SilentBox
®
SB EC.. EC Centrifugal Fan Boxes consist of a sheet steel casing, lined on all sides with 50mm thick
mineral wool lining and motor impeller unit mounted on the motor bedplate. Cover is easily removable through four swing
tops. Motor and impeller can be swivelled out. There is a terminal box for connection to the mains power supply on the
outside. The fans are delivered as fully assembled units. Leave the SB unit in the packaging until installation in order to
prevent any possible damage and contamination. during transport and on site.
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CAUTION
You can cut or scrape yourself due to sharp edges. Wear protective gloves when unpacking!
6.1 Installation preparation
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CAUTION
You can cut or scrape yourself due to sharp edges. Wear protective gloves when checking unhindered running of
impeller!
The fan is delivered as a complete unit as standard, i.e. ready for connection. It can be installed in any position. The
installation and commissioning of the fan should take place after the completion of all other works and after the final
cleaning, in order to prevent damage and contamination of the ventilation unit. In order to prevent the warping of the fan
casing, the attachment must be level and sufficiently stable. Before mounting to a wall or ceiling, the supplied mounting
brackets must be screwed to the casing (not the cover), preferably in the corners.
After the removal of packaging and the start of installation, the following points must be checked:
– is there any transport damage,
– broken or bent parts
– free movement of the impeller
When the impeller is turned by hand, there will be slight resistance due to the permanent magnets. This is for
technical reasons and it is not a malfunction.
6.2 Installation
The prevention of structure-borne sound transmission must be ensured during installation. In this respect, e.g. use
flexible mounting clamps FM.. (see section 3.1).
Mount unit to the wall or ceiling with the mounting device on the rear side. An elastic underlayer should be also placed
between the wall and unit to prevent structure-borne sound transmission. With regard to pipe installation, it must be
ensured that there is a sufficiently long straight pipe section (2.5 x D) before and after the fan, as otherwise significantly
reduced performance and noise level increases can be expected. With regard to installation, it must be ensured that
maintenance is possible without prior removal of the unit (inspection opening). The fan may only be mounted to walls,
ceilings, consoles, etc. with sufficient load-bearing capacity.
NOTE
!
Full fan performance can only be achieved with free inflow and outflow.
Sufficient motor cooling must be ensured, so that there is a minimum air flow area of 20 % for the fan cross-section.
6.3 Installation example: Suspended ceiling
When installing directly in pipeline, e.g. in suspended ceilings (see Fig. 5), the units with small installation
depths fit everywhere. Installation is possible in any position – horizontal, vertical and diagonal.
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NOTE
Fig.5
Fig.6
Installation in suspended ceiling.
Direct in pipeline.
Hinged
motor impeller unit
EN
