Maintenance
32
to lift it in straight vertical direction to avoid collision of the lance (11)
with the combustion tube (12). If the assembly is not free to be easily
lifted, slightly tilt it carefully in different directions until it becomes free.
• Unscrew the 4 screws (13) by holding the ring (14) to prevent the
combustion tube (12) from falling down.
• Remove the ring (14).
• Remove the O-ring (15). If this O-ring and the combustion tube
remained in the furnace after lifting the assembly (6/7), take care to
prevent the combustion tube from falling down out of the furnace. This
can be done by keeping one hand underneath the furnace or by
supporting the ring (14) with two manually driven screws (13).
• Lift the combustion tube (12) out of the furnace top. Lift it in straight
vertical direction to avoid collision with the heating elements.
• Place a new O-ring (9) on a new combustion tube (12).
• Reinstall in reverse order.
NOTICE
Enter the new combustion tube very carefully in straight vertical direction to avoid
collision with the heating elements.
4.7 Lance replacing
Mortal danger from electric shock
Exposed power contacts - High Voltage
- An electric shock can cause injuries in the form of burns and
cardiac arrhythmia, respiratory arrest or cardiac arrest.
• Disconnect the mains power plug before opening the
analyzer’s cabinet.
Fig. 8: Lance replacing
• Switch off the furnace and disconnect the power plug.
• Remove the cover panel (1) of the cabinet. Unscrew 4 screws (2) on
top.
• Remove the tubes (3), (4) and (5) from the upper furnace closure
assembly (6/7).
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