Assembly
• Pivot the heat exchanger into the mainte-
nance position 1, insert the burner unit and
thread in the rear retaining spring.
Position the front retaining spring with a key
into its position.
• Tip the heat exchanger (forward) to return it
to maintenance position 2.
Insert the upper displacer section as far as it
will go into the burner.
• Replace the seal ring and the lower dis-
placer section.
• Insert the displacer clamp.
10
Maintenance steps
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