Checking For Increased Wear Of Fireclay - Viessmann Vitoflex 300-RF series Service And Maintenance Instructions

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Checking for Increased Wear of Fireclay

Increased fireclay wear can be observed in the substructure or in the curved bricking.
Fireclay must only be replaced when:
the curved bricking is broken downwards (not already in the event of formation of cracks or spalling)
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fireproof panel located on the back of the fireclay can be seen in the substructure
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Checking for increased
wear of fireclay
Check the recirculation system
Check damper
Check fireclay for discoloration
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Vitoflex 300-RF Service & Maintenance
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Cleaning in the area of the arch in the chimney
and in the area of the opening of the shut-off
valve
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Recirculation must be hot at partial load
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Damper must be installed
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Damper must not be fully open (chimney draft
may be too strong)
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If discoloration is visible in the fireclay
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If there is discoloration, often halogen
substances have been burned
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