All installations and services must be performed by qualified service personnel.
Figure 9, OPB Heat Exchanger
Remove the clean-out covers. Also, remove the burner compartment cover, the burner, and the burner mounting plate. When removing the clean-out covers, special care must be taken not to damage the gaskets. Should any of the gaskets separate, show evidence of cracks or breaks, or otherwise be unable to provide the necessary seal, the gasket must be replaced before reattaching the clean-out covers, refer to Figure 10.
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