Bosch SSB255 - Page 2

Data subject to change without notice | Printed in the USA | BTC 438002102 B | 08.2019
Bosch Thermotechnology Corp.
Technical Service Bulletin
2 | Heat Exchanger: Refractory Replacement Procedure
5. Remove the gaskets as shown in Fig.5 and Fig. 6 and pull up the burner as
shown in Fig. 7.
Figure 5
Figure 6
Figure 7
After removing the burner, continue as follows:
6. Unscrew the nuts that lock the burner fl ange as shown in Fig. 8.
Figure 8
7. Pull up the refractory ring, the fl ange sealing ring, and the steel basket as
shown in Fig. 9 and Fig. 10.
Figure 9
Refractory ring
Burner flange o-ring
Figure 10
Steel refractory holder
8. Access the refractory disk via the hole in the top of the combustion chamber
as shown in Fig. 11 and 12.
Figure 11