E1200 HT 260-3
8BMaintenance
23.04.07
9-40
00401010_41087
9.4.1
Replacing the Heating Cassette
Proceed as follows to exchange the heating cassette:
1. De-energize the heating.
2. Completely dismount the process tube and the quartz parts.
3. Mark and disconnect the electrical connections at the heating cassette.
4. Remove the cables from the cable channel and screw off the cable channel. Lay
down the cables so that they are not damaged when pulling off the heating
cassette.
5. Close the cooling water supply at the stop valve if the heating cassettes are water-
cooled. Disconnect the connections. Drain the water out of the heating cassette.
Use compressed air to blow out the heating cassette.
6. Steadily pull out the heating cassette. A cassette lift (option) or a fork lift truck
facilitate the task.
7. Remove the temperature measuring module TMM6, the thermocouples, the
overtemperature sensors and the cooling vanes from the heating cassette.
8. Check the insulating rings between heating cassette and horizontal furnace casing
of the heating cassette to be installed. Avoid jamming or damaging the insulating
rings. Otherwise the temperature profile becomes inhomogeneous, resulting in a
greater process result scattering.
9. Put the heating cassette onto the cassette adjustment device and move it into the
furnace.
10. Adjust the heating cassette at the toxic gas exhaust and gas cabinet side to the
center. The height is adjusted using the 13 mm screws mounted at the cassette
adjustment device. The lateral adjustment is realized by simply sliding the heating
cassette. The fine adjustment is done when the process tube is mounted.
11. Connect the cooling water supply to the heating cassette.
12. Open the cooling water stop valve first on the inlet side, then on the outlet side.
Check the cooling system for leaks.
13. If necessary, install the temperature measuring module TMM6 as well as the spike
thermocouples, the overtemperature sensors and the cooling vanes.
14. Install the cable channel and connect the electrical supply of the heating cassette.
Ensure that the heating connections are firmly tightened.
15. Switch on the voltage and measure the heating current.
16. Use high temperature insulating material to close both ends of the heating cassette
to avoid excessive radiant heat when baking out the heating cassette.
17. Bake out the heating cassette in accordance with the bake-out instructions. The
bake-out instructions are located on the heating cassette.
Summary of Contents for E1200 HT 260-3
Page 1: ...Operating Instructions for Horizontal Furnace Equipment E1200 HT 260 3 Version 1 0 1_41087 11 ...
Page 2: ...E1200 HT 260 3 23 04 07 00401010_41087 ...
Page 4: ...E1200 HT 260 3 Document Information 23 04 07 00401010_41087 ...
Page 16: ...E1200 HT 260 3 Index 23 04 07 00401010_41087 ...
Page 18: ...E1200 HT 260 3 List of Figures 23 04 07 00401010_41087 ...
Page 20: ...E1200 HT 260 3 List of Tables 23 04 07 00401010_41087 ...
Page 26: ...E1200 HT 260 3 0BOperating Instruction Remarks 23 04 07 1 6 00401010_41087 ...
Page 34: ...E1200 HT 260 3 1BIntroduction 23 04 07 2 8 00401010_41087 ...
Page 50: ...E1200 HT 260 3 2BSafety 23 04 07 3 16 00401010_41087 ...
Page 78: ...E1200 HT 260 3 4BTransport 23 04 07 5 4 00401010_41087 ...
Page 180: ...E1200 HT 260 3 8BMaintenance 23 04 07 9 76 00401010_41087 ...
Page 228: ...E1200 HT 260 3 10BSpare and Wearing Parts 23 04 07 11 2 00401010_41087 ...