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2 Safety
These ventilating fans are designed for frequency converter opera-
tion and have a high operating reliability. As the blowers are rather
high-powered machines, the safety instructions must be strictly
adhered to in order to avoid injuries, damage to objects and to the
machine itself.
2.1 Speeds
Warning!
The max. permissible fan speeds stated opposite in
Table 1 Technical Data may on no account be exceeded.
2.2 Suction effect
The blowers produce a powerful suction effect.
Warning!
Objects, items of clothing and also hair can be sucked
into the intake port.
Danger of injury.
Do not stand near the intake opening during operation.
The wire guards on the intake ports may only be remo-
ved if hoses or pipes of at least 1m in length are connec-
ted instead. Never operate the blower with open intake
port (danger of injury from the impeller).
2.3 Blowing effect
Warning!
Powerful blow-out at the discharge flange. Sucked-in
objects may be ejected at very high speed
(danger of injury).
Blowers are meant for conveying clean air only. The
sucking-in of solid particles and other contaminants –
which might be discharged – must be avoided at all
times. These objects have to be withheld before ente-
ring into the blower by installing a filter.
The blower may never be operated with open discharge
flange, and therefore has to be protected with a wire
guard in accordance with
Do not grasp into the discharge flange.
2.4 Temperature
Warning!
The blower housing assumes the temperature of the
conveyed medium during operation. If this is above
+50°C, the blower must be protected against direct
contact by the operator (danger of burning).
2.5 Motor circuit breaker
The driving motors are equipped with PTC thermistors for connec-
tion to the frequency converter.
2.6 Proper application
The blowers are designed for conveying clean air only.
Using them for
G aggressive
G poisonous
G explosive or
G very moist
media is not permitted.
The maximum temperature of the conveyed medium must not
exceed +80° C. Solid particles or contaminants must be
withheld by a filter unit before entering the blower.
The maximum ambient temperature must not exceed +60° C, the
minimum not below -20° C.
The blower cannot be operated in an explosive atmosphere.
Special versions for applications not mentioned above are
available on demand.
Remodelling and modifications of the blower are not allowed.
8
DIN EN ISO 13857
.
With special appliances, the instructions in the supplementary
operating instructions also attached must be observed and
complied with. They deviate in certain points from these operating
instructions.
2.7 Generation of noise
The noise generated by a blower is not constant over the whole
performance curve (see diagrams below).
HRD 1T FU
1
2
3
4
5
6
7
8
60
120
180
240
300
360
420
480
.
Volumetric flow rate V
HRD 14T FU
2
4
6
8
10
12
14
16
18
120
360
600
840
1080
.
Volumetric flow rate V
HRD 16 T FU
5
10
15
20
300
600
900
1200
1500
.
Volumetric flow rate V
HRD 2 T FU
5
10
15
20
300
600
900
1200
.
Volumetric flow rate V
HRD 60 FU
5
10
15
20
25
30
300
600
900
1200
1500
1800
.
Volumetric flow rate V
HRD 65 FU
5
10
15
20
25
30
35
40
45
600
1200
1800
2400
.
Volumetric flow rate V
HRD 7 FU
10
20
30
40
50
60
70
60
120
180
240
300
360
420
.
Volumetric flow rate V
In certain unfavourable cases a sound-absorbing device may be
required (measurements by the operator are recommended).
Sound-absorbing measures are to be carried out by the operator
so as not to exceed the legally permitted peak values at the work
places near the blower.
dB(A)
90
85
80
9
10
11
m
3
/min
3
540
600
660
m
/h
dB(A)
95
90
85
3
20
22
24
26
m
/min
1320
1560
m
3
/h
dB(A)
100
95
90
25
30
m
3
/min
3
1800
m
/h
dB(A)
95
90
85
3
25
30
m
/min
1500
1800
m
3
/h
dB(A)
100
95
90
35
40
45
m
3
/min
2100
2400
2700
m
3
/h
dB(A)
100
95
90
50
55
60
65
m
3
/min
3000
3600
m
3
/h
dB(A)
105
100
95
80
90
100
m
3
/min
480
540
600
m
3
/h
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