1.2
Notes on the documentation
WARNING
Hazard due to improper handling of the EX fans
These operating instructions describe safe use of the EX fans.
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Read the operating instructions precisely!
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Keep the operating instructions with the fan. They must permanently be available at the place of use.
2
Important safety information
This chapter contains important safety information for protection of staff and for safe, risk-free operation.
NOTE
We have held a risk assessment for the EX fans. However, it can only apply to the fans themselves. After
integration and installation of the fans, we recommend holding a risk assessment for the entire system.
In this way, you have the guarantee that no potential risk results from the system.
Compliance with EMC Directive 89/336/EEC only relates to these products when they have been con-
nected directly to the customary energy supply mains.
2.1
Proper use
NOTE
The EX fans are intended for integration into ventilation systems. They may not be operated alone!
The EX fans are not ready-for-use products, but have been designed as components for ventilation equipment,
machines and systems. They may only be operated when they have been installed in accordance with their use and
safety has been ensured by protective devices pursuant to DIN EN 294 (DIN EN ISO 12100-1) and the explosion protec-
tion measures necessary according to standard DIN EN 13980.
For the rotating part, a safety distance to the admission nozzle is guaranteed.
The system builder is responsible for the selection of materials for the stationary peripheral parts for fan designs with-
out a protective grid. Only combinations of materials according to DIN EN 14986 may be used.
The fans are only intended for conveying air or explosion-capable atmospheres of Zone 1, Category 2G, and Zone 2,
Category 3G.
The statement of the temperature class on the EX name plate (motor) must match the temperature class of the com-
bustible gas which will possibly occur or the motor must have a higher temperature class.
The maximum admissible operating data on the name plate apply to an air density of p=1.2 kg/m³ and a maximum air
humidity of 80%. The fans are suited to the following maximum ambient and material temperatures:
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AW-EX; RVK-EX und DVEX: 40°C
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AXC-EX, AXCBF-EX: max. 60°C.
Ex fans are in Category 2G according to Directive 94/9/EC. For intake of aggressive atmosphere, an additional acid pro-
tection for the fan parts subjected to it is necessary.
If fans are controlled with engines of the „d“ ignition protection class with frequency converter, thermal protection by a
posistor (PTC) in the motor is necessary.
2.2
Improper use
Improper use is above all when you use the EX fans in a way other than that described. The following points are incor-
rect and hazardous:
•
conveying solids or shares of solids in the conveying medium
•
intake of media containing dust or with a such a dust content that depositing on the blades and on the housing of the
fan may influence the operation and the explosion protection of the fan. If there is the risk of such deposits, matching
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