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FERtech 25 OV
3.3 Maintenance
The following operations are strictly reserved for Qualified Personnel, such as corgi registered
engineers or Fer engineers.
Seasonal inspection of the boiler and flue
It is advisable to carry out the following checks at least once a year:
• The control and safety devices (gas valve, flow meter, thermostats, etc.) must function correctly.
• The flue terminal end piece and ducts must be free of obstructions and leaks.
• The gas and water systems must be sound.
• The burner and exchanger must be clean.
• The electrodes must be free of scale and correctly positioned.
• The system pressure when cold must be approx 1 bar; otherwise, bring it to that value.
• The expansion vessel must be filled to 1 bar cold with zero system pressure.
• The gas flow and pressure must correspond to that given in table 10 section 4.4 page 33.
• The circulating pump must be vented and free of debris.
• The returned filter cleaned.
• The condensate trap inspection bowl should be cleaned and free of debris.
Cod. 3540U431 - 11/2009 (Rev. 00)
27
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