Data subject to change without notice | Printed in the USA | BTC 438002102 B | 08.2019
Bosch Thermotechnology Corp.
Technical Service Bulletin
4 | Heat Exchanger: Refractory Replacement Procedure
Bosch Thermotechnology Corp.
65 Grove Street
Watertown, MA 02472
Tel: 1-866-642-3198
Fax: 1-954-776-5529
www.boschheatingandcooling.com
14. Mark the steel coil at the two edges of the refractory half-disc as a reference
for the fi nal assembly as shown in Fig. 18.
Figure 18
15. Remove the dented half-disk and place a strip of sealant on its inner edge as
shown in Fig.19.
Figure 19
16. Place the half-disk again on the disc holder by keeping the sealant upwards;
make sure the edges match with the marks previously taken as shown in
Fig. 20.
Figure 20
17. Take the second half-disk and place a strip of sealant at the inner edge as
shown in Fig. 21
Figure 21
18. Place the second half-disk matching the fi rst one and press carefully by
hands without using any tools in order to avoid any possible breakage. See
Fig.22.
Figure 22
WARNING:
Please wait at least 12 hours before turning on the burner, or
you could risk damaging the heat exchanger.
19. Re-assemble all components, and check all gaskets (burner / o-ring fl ange
gaskets).
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