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Installation and Operating Instructions
m
ATTENTION
m
ATTENTION
RADAX
®
VAR . . – High pressure in-line 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
VAR.. 225 Ex
VAR.. 250 Ex
VAR.. 280 Ex
VAR.. 315 Ex
VAR.. 355 Ex
VAR.. 400 Ex
VAR.. 450 Ex
VAR.. 500 Ex
VAR.. 560 Ex
VAR.. 630 Ex
VAR.. 710 Ex
VAR.. 800 Ex
VAR.. 900 Ex
VAR.. 1000 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
A motor protrusion arises depending on the size and motor power and thus an unbalanced center of gravity outside
of the housing. 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)
225
250
280
315
355
400
450
500
560
630
710
800
900
1000
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)
2,25
2,5
2,8
3,15
3,55
4,0
4,5
5,0
5,6
6,3
7,1
8,0
9,0
10,0
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
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