Maintenance/trouble setting
26
DVV-Ex XS-XL 23.02.2015
•
The fan may operate only within the limits declared on the nameplate, operation over 50 Hz is not allowed (excep-
tion: the fan can be approved for 60 Hz operation, if synchronous speed at 60 Hz does not exceed the data from
the table in section 5.1; in that case the fan will be accordingly designed and marked on the nameplate).
•
Prevent sucking of foreign particles , this can destroy the fan.
•
Switching frequency:
-
the fan is intended for S1 continuous operation!
-
the control equipment must not allow any extreme switching!
•
In case of speed control via frequency inverter (
min. 20 Hz ÷ max. 50 Hz!
), make sure that the voltage peaks on the
connection terminals of the fan are lower than 1000 V and voltage rise velocity is lower than 500 V/μs (IEC 34-17).
ATTENTION
Hazard with risk of additional costs
•
For speed control is recommended a combination of frequency inverter and appropriate all-pole sinus
filter (or minimum dU/dt filter). It is particularly important, if the supply cable is long, but also to re-
duce the motor noise. It may only be abandoned, if proven, that the voltage peaks on the connection
terminals of the fan are lower than 1000 V and the voltage rise velocity is lower than 500 V/μs.
•
At all single speed motors there are 4 wires (+PTC) led to connection box.
Starting “star – delta” is not
possible!
9.3
Operation/use
Only use the fan in accordance with this operating instruction and the operating instructions of motor.
Control the fan during operation for correct function.
Switch the fan off as planned.
WARNING
Hazard from electrical voltage and flying parts!
Errors occurring can lead to personal and/or property damage!
Switch the fan off as planned:
•
In cases of a non-typical noise from bearings, vibrations, pressure pulsation.
•
In case of overcurrent, overvoltage or temperature (nameplate).
10.
Maintenance/trouble setting
WARNING
Hazard from electrical voltage!
•
Trouble setting and service only by a trained electrician or trained and instructed qualified personnel!
•
Observe rules for safe work while troubleshooting!
•
Observe 5 safety rules for the electrical expert!
-
disconnect from the power supply (all-pole),
-
prevent switching on again,
-
test absence of voltage,
-
earthing and short-circuiting,
-
protect adjacent live parts by covers and barriers and fit a suitable warning notice.
