Nicotra Gebhardt RLM 53 Betriebsanleitung Seite 27

BA-CFD-RLM 9.9 – 05/2021
CAUTION The compliance with EMC-directive has to be valuated for the complete
installation with regard to the application.
It is customer responsibility!
6.2 Test run
The fan should be switched on briefly to check that the direction of rotation of the impeller
agrees with that indicated by the arrow. In the event of the motor running in the wrong
direction the poles are to be changed over while observing the electrical safety instructions.
6.3 Checking the current consumption
CAUTION On reaching the operating speed of the fan immediately measure the current
consumption and compare it with the nominal current on the motor or fan type plate. In
the event of a substantial overcurrent switch off immediately.
6.4 Check for quiet running
CAUTION Check on the quiet running of the fan. There should be no unusual rocking or vibration.
Check for untypical bearing noises.
6.5 Flow measuring device
The fans are equipped with a flow measuring device as standard. With the flow
measuring device it is possible to measure/monitor the flow easily after the fan is
installed.
q
V
When fans are built in a plenum, it is required to measure the differential pressure
between the static pressure in the plenum on the suction side and the pressure at the
inlet cone.
To ensure that the static pressure to be measured at the inlet nozzle is not distorted by
dynamic velocities, it is recommended to attach a ring of points on the wall as shown in
the following diagram.
When using a differential pressure sensor, the signal can be used for control purpose.
2
   
K p
Dü

q volume flow
V
K calibration factor
ρ density of media
p
pressure difference at cone Pa
Dü
English
m³/h
m²s/h
kg/m³
EN-9/18