Rvk-Ex Duct Fans - SystemAir AW 355 D4-2-EX Montage- Und Betriebsanleitung

6.3

RVK-EX duct fans

6.3.1 Preconditions
•
The RTRD control devices and UEK motor protection devices supplied by RTRD must be fi tted outside the explosion-
capable area.
•
When complying with the material combinations, the following minimum gaps must also be complied with:
–
between rotating and stationary parts, the minimum gap may not be smaller than 1 % of the decisive contact
diameter, but no less than 2 mm in an axial or radial direction and may not be more than 20 mm.
• Fans without wire grid or without admission nozzle:
–
To fi t on the stationary motor fl ange, uses screws of strength class 8.8 and secure with Loctite.
–
Admissible tightening torques: M6 = 9.5 Nm; M8 = 23 Nm.
•
To avoid disturbances and to protect the motor, the latter must be disconnected from the mains by the installed
posistors (DIN 44082-M130) in the event of a disturbance of operation (e.g. inadmissibly high medium temperature)
in combination with a triggering device (identifi cation II (2) G cf. Directive 94/9/EC).
–
Current-dependent protection is not admissible and also not possible as secondary protection.
6.3.2 Assembly
 Use the enclosed holding clamps.
 Screw the holding clamps tight by hand.
NOTE
If the cable gland is loosened this has to be locked properly again (Admissible tightening torques max.
3,8 Nm!).
WARNING
Danger from falling parts!
› Check the underground (ceiling/wall) for strength before assembly,
› when selecting the fi tting material, pay attention to the weight, vibration tendency and shearing
forces (weight, see name plate).
 Fit the fan on a fi rm base with suitable fi tting material.
 Fit the air connection lines and the accessories.
 Make sure that no movable parts are accessible any more after installation (EN 294).
NOTE on the condensation opening of the RVK-EX series
Pay attention in installation:
With a vertical motor axis, the condensation opening at the bottom must be open.
Ex-fans - 06.2014
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