ABB SCK, System Manual

Page: 148 / 244

148 System Manual SCK Gas Sampling System 42/23-81 EN Rev. 4
Maintenance plan
This section gives an overview of maintenance work to be performed at regular
intervals. The tasks described here require special training and under some cir-
cumstances involve working on control cabinet open and powered on. They must
therefore only be carried out by qualified and specially trained persons.
If it can be assumed that safe operation is no longer possible, the gas sampling
system must be taken out of operation and secured against being started up again
unintentionally.
It can be assumed that safe operation is no longer possible:

if the gas sampling system is visibly damaged,
 if a check reveals problems,
 if the gas sampling system no longer works,
 after prolonged storage in adverse conditions,

after severe transport stress.
It is recommended to have the gas sampling system maintained by the ABB repre-
sentative responsible for you.
When performing maintenance work on the gas sampling system, the service
switch must be in the
ON position with a few exceptions (for example, when check-
ing the EMERGENCY STOP switch). Actuating the service switch automatically
retracts the gas sampling probe out of the kiln, and the controller displays the
Maintenance message. See Chapter Operating the service switch on page 159 for
more details.
You can secure the service switch with a padlock to prevent unintentionally restart-
ing the gas sampling system.
Introduction
Service switch
Unintentional restart