Maintenance
9.2 Corrective Maintenance
WOGeneric TEAAC / 2008
52 Siemens AG Operating Instructions 1.03 1RQ671...-Z
9.2.3 Repairing the air intake cowl
WARNING
Rotating or live parts
Live electrical parts are dangerous. Contact with them can cause death, serious injury or
material damage.
Before carrying out any maintenance work on the fan, disconnect the mains connection,
particularly before opening the terminal box. Make sure that the device cannot be switched
back on.
Dismounting
The fan cowl is made of sheet steel and welded together.
● Before the fan cowl is removed, unscrew the terminal box for the speed sensor
completely so that it is not necessary to undo the connections.
Assembly
● When fitting the fan cowl, make sure that the retaining components are correctly installed.
● Check that there is a uniform gap of at least 2mm between the fan impeller and the air
inlet nozzle.
● Before you bolt on the protective screen when assembling, make sure that the deflecting
baffle with nozzle at the air intake opening is adjusted by means of the clamping pins
provided. The radial gap between the air inlet nozzle and the fan impeller should be at
least 2 mm.
9.2.4 Repairing the fan
Plastic radial fan impellers have two integrally molded tongues which engage with the
circumferential groove of the shaft to provide axial fixing.
Dismounting
● Before pulling off the fan, disengage the two tongues hold them provisionally in the raised
position, e.g. by means of inserted shim plates.
● Pull off the fan The fan discs each have two openings for the insertion of a pull-off device,
which should be applied so as to act on the hub. Always use a suitable device for pulling
off and pushing on. Do not use a hammer under any circumstances.
Assembly
● Before pushing the fan onto the shaft, make sure that the two integrally molded tongues
which provide axial location in the annular groove are intact.
● Push the fan onto the shaft.
To Next Page
Loading...
