Maintenance Work - ABB ProKiln GAC400 Operating Instruction

100 ProKiln GAC400 PROBE GAS SAMPLING SYSTEM | OI/GAC400-EN REV. A
... 11 Maintenance

Maintenance work

Operating the service switch
Safety measures
WARNING
Dangers when operating the service switch.
Always take the following safety measures when performing
this work:
• Wear the general protective equipment.
• Before commencing any work on the probe gas sampling
system, turn the Service Switch -50S15 to Service Mode
and secure the service switch against unauthorized
switching (with a padlock).
• Additionally secure against any unplanned probe
movement by switching the Safety Switch -101S2 to OFF
position at the probe rear cabinet.
• Additionally press the EMERGENCY-STOP -15S7 or -150S3
switch before working on the retractor or probe.
• Do not enter the danger area around the retractor until it
is at standstill and the warning lamps and buzzer are off.
• Never stand in the danger area around the retractor when
the protective installation is closed.
• When the warning lamps light up or the warning buzzer
buzzes, leave the danger area around the probe retractor
immediately as the probe is about to move at any
moment.
• Press the EMERGENCY-STOP switch immediately if anyone
is still in the danger area around the retractor after the
warning lamps light up or the warning buzzer buzzes.
Note
For an explanation of the safety measures see Safety
instructions for maintenance work on page 98.
Introduction
The service switch puts the system into service mode. If work
described in the following maintenance instructions must be
performed in service mode, proceed as follows.
Requirements
The service switch is in the OFF position.
Instructions
How to put the system in service mode:
1. Make sure that no-one is standing in the area of probe
retractor travel.
2. On the control cabinet: Turn Service/Operation mode switch
-50S15 counter-clockwise to the Service Mode position.
Info! Actuating the service switch will not cause any
movement of the probe as it will continue its operation
according to the controller program. The service switch will
put the system in manual mode.
3. Secure the Service Mode switch against unauthorized
actuation.
4. When working on the retractor and gas sampling probe,
additionally actuate the EMERGENCY-STOP -15S7 or -150S3
switch for reasons of safety and turn the Safety switch -
101S2 at the probe rear cabinet to OFF position, to prevent
any movement of the probe. This switch can also be secured
with a padlock.
Result: The gas sampling probe will remain in the position it
had before the Emergency Stop was pushed .
Info! If the probe is left inside of the kiln during maintenance
work for prolonged time, there is risk of overheating,
excessive build-up of material and failure of cooling system.
If it is expected that maintenance work will be very long, it is
recommended to take the probe out of the kiln before
starting with the work.