Operation
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MRH 06.04.2017
DANGER
Hazard from crushing/shearing by the hatch cover!
The hatch cover can be stopped in any position by turning the actuator`s service switch to middle (0) posi-
tion.
Check the functioning of system – observe instructions of actuator, especially intermittence and time of pres-
ence of control voltage (see also Appendix 4).
After checking set the actuator`s service switch to position 1 (ready to open) and secure it.
9
Operation
9.1
Operation/use generally
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).
NOTE
At single speed motors with nominal power from incl. 5,5 kW (D400V) we recommend “star – delta” start-
ing or soft start. For this purpose, all 7 wires are led to connection box/service switch.
9.2
Emergency use (use in case of fire)
Serially equipped MRH is intended for emergency use only. Access to hazardous zone is allowed and possible with ob-
serving safety measures for maintenance and service only.
DANGER
Hazard from touching impeller, if not covered with protective grid!
The outlet protective grid is serially provided.
DANGER
Hazard from crushing/shearing by the hatch cover!
The hatch cover can be stopped in any position by turning the actuator`s service switch to middle (0) posi-
tion.
Observing safety measures, it is to assure:
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.
