Technical Service Bulletin: Heat Exchanger: Refractory Replacement Procedure Models: SSB255, SSB399, SSB512 WARNING: The operations described here-below must be performed by qualified personnel. WARNING: Before replacing the refractory, disconnect the equipment from the power supply with the main ON/OFF switch and Gas hose fitting close the manual gas shutoff valve.
After removing the burner, continue as follows: Unscrew the nuts that lock the burner ﬂ ange as shown in Fig. 8. Figure 11 Figure 8 Data subject to change without notice | Printed in the USA | BTC 438002102 B | 08.2019 Bosch Thermotechnology Corp.
Figure 17 11. Place the ﬁ ber disc on the disc holder of the combustion chamber as shown in Fig. 15. Data subject to change without notice | Printed in the USA | BTC 438002102 B | 08.2019 Bosch Thermotechnology Corp.
Fig. 20. 19. Re-assemble all components, and check all gaskets (burner / o-ring ﬂ ange gaskets). Bosch Thermotechnology Corp. 65 Grove Street Figure 20 Watertown, MA 02472 Tel: 1-866-642-3198 Fax: 1-954-776-5529 www.boschheatingandcooling.com...