IMO BKF
Operation
12 BKF 16.08.2021
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).
NOTE
At single speed motors with nominal power from incl. 4 kW (D400V) we recommend “star – delta” starting
or soft start.
9.2 Emergency use (use in case of fire)
BKF is delivered without protective grid on the outlet side. Access to hazardous zone is allowed and possible with
observing safety measures for maintenance and service only.
DANGER
Hazard from touching impeller, if not covered with protective grid!
The outlet protective grid is available as accessory.
Observing safety measures, it is to assure:
During operation, touching the impeller must not be possible.
Safety components must not be bypassed or put out of function.
Prevent sucking of foreign particles, this can destroy the fan.
The fan may operate only within the limits declared on the nameplate.
In case of fire bridging of motor protective devices is necessary to assure operation. Switch on max. speed even
after eventual short supply cut off must be assured.
9.3 Dual use (daily ventilation + emergency use)
Once safety assured with above measures (9.2), it is to observe:
Switching frequency:
- the fan is intended for S1 continuous operation!
- the control equipment must not allow any extreme switching!
The fan may operate only within the limits declared on the nameplate.
In case of fire bridging of motor protective devices is necessary to assure operation. Switch on max. speed even
after eventual short supply cut off must be assured.
The fans were hot tested with frequency converter and without filter. However, it is recommended to bridge even-
tual converter in case of fire (to prevent any error at motor protection setting or operation). If frequency converter
is used in case of fire, PTC and any motor protection must be bridged and switch on max. speed even after even-
tual short supply cut off assured.