Anti-Condensation Heating - Siemens 1LA8 Operating Instructions Manual

9.2.3

Anti-condensation heating

Explosion hazard when repairing the anti-condensation heating
If repairs to the anti-condensation heating are not carried out correctly, e.g. if unauthorized
or untested spare parts are used, explosions can occur when the machine is operated in an
explosive atmosphere. This can result in death, serious injury or material damage.
The anti-condensation heating must be repaired and the necessary routine testing that
follows repair must always be undertaken by experts from the Service Center (Page 143),
as this work requires extensive specialist knowledge. Only authorized and tested spare parts
may be used.
9.2.4 Fan cowl
To remove or replace the external fan, the fan cowl must be disassembled. The fan cowl is
fixed on the machine enclosure with screws.
Disassembly
1. Secure the fan cowl against falling before you start working.
2. Loosen the fixing screws that secure the fan cowl on the enclosure.
3. Observe existing retaining components and retain them for the reassembly.
Assembly
Proceed in the reverse order to assemble the fan cowl.
1. Position the fan cowl and tighten the fixing screws.
2. Ensure that the retaining components are undamaged and correctly installed.
9.2.5 External fan made of metal
External metal fans have a keyway connection and are prevented from axially shifting using
a locking ring.
Disassembly
1. The external fan
2. Use a suitable device to pull off the external fan.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014
WARNING
①
is fixed on the shaft with a locking ring
Pliers according to DIN 5254 should preferably be used for this purpose.
Maintenance
9.2 Corrective Maintenance
②
. Remove the locking ring.
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