10.2.6.2 Replacing the O-rings on the combustion tube
Risk of burns
Hot machine parts
− Some parts of the machine can get very hot and cause burns when
touched without wearing protective gloves.
• Wear heat-resistant protective gloves when working with hot
machine parts.
• Never touch hot parts of the machine without suitable protective
gloves.
The O-rings are at the front and back end of the combustion tube. The O-rings should always
be replaced with the combustion tube.
The O-rings on the combustion tube of the HTFr must not be greased.
Replace the O-rings on the combustion tube as follows:
1. Turn the analyzer to Position 0 on the main switch or switch to the induction furnace mode
in the ELEMENTS software
The analyzer in the analyzer must not generate any vacuum in the HTFr.
2. Turn the HTFr to Position 0 on the main switch and pull out the power plug.
3. Wait until the machine has cooled down sufficiently.
4. Open the machine door (1) at the front of the HTFr.
5. Remove the furnace locking device, see “Removing the combustion tube”.
The O-ring at the front is now accessible:
Fig. 45: O-ring behind the furnace locking device
6. Pull off the O-ring (2) and put a new one on (Part No. 70380).
The O-ring should be at a distance of approx. 2 cm from the end of the tube.
7. Remove the dust box at the back of the HTFr, see “Removing the dust box”.
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