6.6.1 Replacing the o-rings 11 and 12 for combustion tube:
• Remove the furnace housing by just loosening the nuts (16).
• Open the furnace.
• Unscrew the knurled nuts (1) and washers (2).
• Unscrew the wing nuts (3).
• Unscrew the nuts (4) and detach tubes (5).
• Remove the furnace cleaning system, by pulling up the mounting (6).
• Unscrew the nut (7) and detach the tube (8).
• Unscrew the wing nuts (9) and pull down lower furnace lock (10).
• Now the O-rings (11) and/or (12) can be removed and replaced. Apply a thin layer of
grease on the inner surface of the new O-rings, before mounting them. Apply a thin layer
of grease on the outer surface of the combustion tube, where the new O-rings will be
placed.
• Reinstall in reverse order.
6.6.2 Replacing the o-ring 13 for lower furnace lock
• Remove the furnace cover by just loosening the nuts (16)
• Unscrew the nut (7) and detach tube (8)
• Unscrew the wing nuts (9) and pull down lower furnace lock (10)
• Remove the O-ring (13) with a screwdriver; insert a new one without greasing it.
• Reinstall in reverse order.
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