Commissioning; Preconditions; Series-Specifi C Precondition; Precondition For Speed-Variable Fans - SystemAir AW 355 D4-2-EX Montage- Und Betriebsanleitung

8

Commissioning

NOTE
The safety information in Section 8.1 applies to all the fans described in these operating instructions.
8.1

Preconditions

HAZARD
Hazard of explosion of an ignition-capable gas/air atmosphere!
When commissioning the EX fan, the fundamental information from BGR 104 (explosion protection rules
of the employers' insurance schemes) and BGR 132 (avoidance of risk of ignition as a result of electro-
static charges) must be known.
• Fitting and electrical installation have been completed properly.
• Residues from assembly and foreign bodies have been removed from the fan area.
•
The intake and blow-out openings are free.
•
The fan wheel runs freely.
• The safety devices have been fi tted (contact protection).
•
The protective conductors and external earth conductor have been connected.
•
The thermo-contacts (temperature monitors) have been properly connected to the motor protection switch.
•
The motor protection switch is functioning.
• The temperature monitor is functioning.
•
The wire inlet is tight.
•
The connection data match the data on the name plate.
• Nominal power consumption (name plate) is not exceeded.
•
All conductive added and accessory parts have been earthed.
8.2 Series-specifi c precondition
AW-EX and RVK-EX series
•
Installation position and arrangement of the condensation bores match.
DVEX series
•
Voltage tolerances according to IEC 38 with a maximum of 6 % or -10 % are complied with.
• Nominal current does not exceed the nominal voltage.
8.3

Precondition for speed-variable fans

•
If there is a reduction in voltage in a speed-variable fan, the fan must be operated with a current between 15 and
100 % above nominal current. Make absolutely sure whether a minimum pressure has been stated for the fan.
• Operate the fan with the voltages and frequencies stated on the name plate of the fan (adhesive plate). Operation
with the voltages / circuits stated on the name plate (motor) is admissible, but not sensible. Exceeding the stamped
nominal current in speed variation by reduction of voltage by the value (...%) stated in the EC type test certifi cation is
admissible.
•
Motor protection is by a DIN 44082-M posistor in combination with a triggered device with identifi cation (EX II (2) G
see Directive 94/9/EC). The posistor covers all disturbances such as inadmissible material temperature or operation in
an inadmissible area of the fan characteristics.
•
The name plate contains the electrical values approved in the EC type test certifi cate for optimally cooled motors. The
design voltage stated in it for the speed-variable motor can be larger than the assessment voltage of the fan (adhe-
sive plate) in order to achieve a favourable variation behaviour of the fan.
Ex-fans - 06.2014
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