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Maintenance
9.1 Inspection and maintenance
9.1.11
Sealing the rolling-contact bearings ("Increased degree of protection" option)
Relubricating the grease tank
In order to achieve optimum sealing of the rolling contact bearings and to reliably seal the
labyrinth joints with grease, the chamber must be relubricated at regular intervals. The
procedure is the same as that for lubricating grease. The sealing effect during operation is
optimum as long as a small amount of relatively clean grease is forced out.
Regreasing intervals
The necessary relubrication intervals depend essentially on the level of dirt in the environment
and on the ON time of the motor. For this reason, they can only be defined taking into account
the respective operating conditions. Make sure that the groove in the seal is full of grease at all
times.
9.1.12
Cleaning the air-to-water heat exchanger
● Clean the air-to-water heat exchanger in accordance with the operating instructions of the
9.1.13
Servicing the external fan
Injury caused by rotating parts or live (under voltage) 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 external fan, disconnect it from the
● Make sure that the device cannot be switched back on.
Servicing the external fan
However, dirt and dust deposits on the impeller and the motor, particularly in the gap between
the impeller and the inlet nozzle can impair its function.
● Remove the dirt and dust deposits regularly; the intervals depend on how dirty the
● Make sure that the impeller is cleaned evenly, as irregular deposits can lead to an
● The full air flow can only be achieved when air can freely flow through the impeller.
140
heat exchanger manufacturer. These instructions specify the conditions to be complied with
and describe the available cleaning methods.
Instructions of the heat exchanger manufacturer
WARNING
mains, particularly before opening the terminal box.
surrounding area is.
imbalance.
SIMOTICS FD 1MN1
Operating Instructions 02/2019
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