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SilentBox® SB EC ... EC Centrifugal Fan Boxes
Installation and Operating Instructions
• Protection against contact must be ensured pursuant to DIN EN 13857
in the installed condition (see section 2.8)!
Contact with rotating parts must be avoided.
• A uniform inflow and free outlet must be ensured!
• When using a vented fire place (chimney) in a ventilated room, there
must be sufficient supply air for all operating conditions (consult chim
ney sweep).
The current locally applicable regulations and laws must be observed!
1.3 Application
– Normal use:
The SilentBox® SB EC ... EC Centrifugal Fan Boxes are designed for versatile application in extract and outside air
systems in residential, industrial and commercial areas with special noise level requirements.
With noise-insulated casing (designed as a sound absorber) equipped with non-abrasive, sound-absorbing mineral
fibre boards (50 mm) for almost silent operation. SilentBox® SB EC ... are suitable are suitable for conveying normal or
slightly dusty (particle size < 10 µm, G4 filter upstream if necessary), less aggressive and humid air, moderate climates
and in the range of their performance curves, see Helios sales documents / internet. Operation is only admissible with
fixed installation within buildings. The maximum admissible media and ambient can be found on the type plate.
– Reasonably foreseeable misuse:
The fans are not suitable for operation under difficult conditions, such as high levels of humidity, aggressive media, long
standstill periods, heavy contamination, excessive loads due to climatic, technical or electronic influences. The same
applies for the mobile use of fans (vehicles, aircraft, ships, etc.). Usage under these conditions is only possible with
release approval from Helios, as the standard version is not suitable in this case.
– Improper, prohibited use:
Any use other than the intended use is not permitted! The conveying of solid matter or solid matter content > 10µm in
air and liquid is not permitted. Transport media, which affect the materials of the fan, and abrasive media are not per-
mitted. Use in explosive atmospheres is not permitted! Outside operation of the fan is not permitted.
1.4 Personnel qualification
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DANGER!
The electrical connection and commissioning as well as the installation, servicing and maintenance of the fan must
only be carried out by qualified electricians.
SilentBox
®
SB EC ... can be used by children over the age of 8 as well as persons with physical, sensory, or mental disabili-
ties or lack of experience and knowledge, if they are supervised or instructed with regard to the safe use of the unit and they
understand the resulting risks. Children must not play with the unit. Cleaning or user maintenance must not be carried out by
unsupervised children.
1.5 Functional safety – Emergency operation
When using the fan in an important supply function, the plant is to be designed so that emergency operation is automatically
guaranteed in case of fan failure. Suitable solutions are, for example, parallel operation of two less powerful units with a sepa-
rate electric circuit, standby fan, alarm systems and emergency ventilation systems.
1.6 Product service life
The motors are equipped with maintenance-free, permanently lubricated ball bearings. The units are designed for a
service life of at least 40000 h with continuous operation and constant load (S1 operation) at maximum power in the
maximum permissible ambient temperature.
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DANGER
EN
