Data subject to change without notice | Printed in the USA | BTC 438002102 B | 08.2019
Bosch Thermotechnology Corp.
Technical Service Bulletin
Heat Exchanger: Refractory Replacement Procedure | 3
Figure 12
Refractory disc
9. Pull the refractory disc out and carefully remove all of the debris from the
holder, as shown in Fig 13.
Figure 13
Place for dented
refractory disc
10. The replacement kit (part# 7738006357) contains 2 refractory half-discs,
a sealant cartridge and a fi ber disc, shown in Fig. 14.
Figure 14
11. Place the fi ber disc on the disc holder of the combustion chamber as shown
in Fig. 15.
Figure 15
12. Place the dented refractory half-disc (fi g. 16) on the fi ber disc;
Figure 16
13. Make sure the dented half disc is placed as shown in Fig. 17. Also make sure
it matches perfectly to the disc holder and to the coil by turning it with your
hand.
Figure 17
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