18
06.2019
The information given in these operating instructions is only applicable to the fan type specied
on the title page. The type label with the type denomination is located on the base frame or on
the side panel of the fan housing. With all enquiries, make sure to specify the order conrmation
no. and the type label properly to ensure correct and quick handling.
4.3 Built-in safety systems (to be implemented by the user)
The built-in safety devices must be checked at regular intervals:
d = daily, w = weekly, m = monthly, j = yearly.
The following methods must be used for checking:
V = visual check, F = functional check, M = measurement.
Check
Interval Method
y F
Overcurrent protection device
To prevent overheating (re hazard) in the event of overload (e.g. due
to clogging), the fan drive has to be provided with an overcurrent pro-
tection device.
Thermal contact (optional)
For temperature monitoring, the fan is equipped with a thermal
contact. In the event of a temperature increase, the motor switches
o.
PTC resistor (optional)
Don‘t connect the PTC resistor to the mains voltage. Avoid exceeding
a max. PTC resistor test voltage of 2.5 V.
Protective claddings
All mobile fan components driven by the electric motor as well as all
other hazardous parts of the fan are covered by xed, safely fastened
protective claddings that can be removed only using tools.
Check
Interval Method
y V, F, M
Electrical connection
The electrical connections are made using a 4-wire supply cable sys-
tem, 3 phases and 1 earth conductor with three-phase motors and
using a 3-wire supply cable system, 1 phase, 1 neutral wire and 1
earth conductor with alternating current motors.
Check
Interval Method
y F
Check
Interval Method
y F
Check
Interval Method
m V
Meaning of possible device categories on the type label:
II 2G
The fan is suitable for exhaustion from zone 1
and for installation in zone 1
II 2/3G
The fan is suitable for exhaustion from zone 1
and for installation in zone 2
II 3G
The fan is suitable for exhaustion from zone 2
and for installation in zone 2
II 3/-G
The fan is suitable for exhaustion from zone 2
and must be installed outside the hazardous area
Operating manual
Centrifugal fans
HF R | RV | MRV
www.hlu.eu
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General