Minimum Air Gap In Compliance With The Material Combinations; Maximum Permissible Vibration Limits; Center Of Gravity - Helios HRF 250 Ex Série Notice De Montage Et D'utilisation

Installation and Operating Instructions
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ATTENTION
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ATTENTION
HRF..  – Axial high-performance fans
3.2

Minimum air gap in compliance with the material combinations

Move impeller by hand to test unhindered running of impeller.
Before installing check the minimum air gap between the impeller tip and casing according to the following table:
Type
HRF.. 250 Ex
HRF.. 315 Ex
HRF.. 355 Ex
HRF.. 400 Ex
HRF.. 450 Ex
HRF.. 500 Ex
HRF.. 560 Ex
HRF.. 630 Ex
HRF.. 710 Ex
If the stated values do not correspond to the specified
dimensions, the fan may not be installed or operated.
For questions, please contact the Helios customer service.
Own repair attempts are strictly prohibited!
3.3 Maximum permissible vibration limits according to ISO 14694 / ISO 10816-3
Operation
stationary mounted set up flexible
[mm/s] [mm/s]
4,5
– Installation of a vibration monitor in Ex-version (accessory)
The vibration monitor must be installed on the casing and may not lie in the range of rotation of the
impeller zone.
The air gap (see Fig. 3) may not be influenced by the installation of the vibration monitor!
3.4

Center of gravity

For fans with larger motors the motor may protrude and thus an unbalanced center of gravity outside of the casing
arises. For centering the balance point an extension duct is to be used (Fig. 4).
The weights of the respective types are to be found on the type plate!
CORRECT!
Casing-Ø (mm)
250
315
355
400
450
500
560
630
710
max. permissible vibration limits for a fan power <75 kW
Alarm
stationary mounted
[mm/s]
6,3 7,1
(Center of gravity)
5
Minimum air gap (in mm)
2,5
3,2
3,6
4,0
4,5
5,0
5,6
6,3
7,1
Switching off
set up flexible stationary mounted
[mm/s] [mm/s]
11,8 9,0
INCORRECT!
(Center of gravity)
EN
Fig.3
set up flexible
[mm/s]
12,5
Fig.4