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6.3 RVK-EX duct fans

6.3.1 Preconditions

• The RTRD control devices and UEK motor protection devices supplied by RTRD must be 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 t on the stationary motor 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 (identi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 tting material, pay attention to the weight, vibration tendency and shearing

forces (weight, see name plate).

" Fit the fan on a rm base with suitable 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.

6.4 DVEX roof fans

6.4.1 Preconditions

• Only install the fan if the minimum air gap between the rotor and the nozzle is 4 ... 8 mm.

• Installation position optional if not stated to the contrary.

• Protective accessories must have been examined with a view to strength and material.

6.4.2 Assembly

Ex-fans - 10.2014

SystemAir EX Series User Manual

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