T-ONE C HE
23EN
cod. 3541D730 - Rev. 00 - 05/2013
3.4 Routine servicing, maintenance & repair
General
PLEASE NOTE: During routine servicing, and after any maintenance or change of part of the combustion circuit, we
recommend that the following is checked:
• The integrity of the flue system and the flue seals;
• The integrity of the boiler combustion circuit and the relevant seals;
• The operational (working) gas inlet pressure at maximum rate, as described in section 4.4;
• The gas rate, as described in section 4.4;
• The combustion performance, as described in section 3.4 Combustion check.
Competence to carry out the check of combustion performance
PLEASE NOTE: BS 6798: 2009 Specification for installation and maintenance of gas-fired boilers of rated input
not exceeding 70 kW net advises that:
• The person carrying out a combustion measurement should have been assessed as competent in the use of a flue
gas analyser and the interpretation of the results;
• The flue gas analyser used should be one meeting the requirements of BS7927 or BS-EN50379-3 and be calibrated
in accordance with the analyser manufacturers’ requirements, and
• Competence can be demonstrated by satisfactory completion of the CPA1 ACS assessment, which covers the use
of electronic portable combustion gas analysers in accordance with BS 7967, Parts 1 to 4.
Periodical check
To keep the unit working properly over time, it is necessary to have qualified personnel make an annual check that includes the fol-
lowing tests:
• The control and safety devices (gas valve, flow meter, thermostats, etc.) must function correctly.
• The fume extraction circuit must be fully efficient.
• The airtight chamber must be sealed
•The
air-flue terminal
and ducts must be free of obstructions and leaks
• The condensate evacuation system must be efficient with no leakage or obstructions.
• The burner and exchanger must be clean and free of scale. When cleaning, do not use chemical products or wire brushes.
• The electrode must be free of scale and properly positioned.
• The gas and water systems must be airtight.
• The water pressure in the cold water system must be about 1 bar; otherwise, bring it to that value.
• The circulation pump must not be blocked.
• The expansion tank must be filled.
• The gas flow and pressure must correspond to that given in the respective tables.
A
The boiler casing, panel and aesthetic parts can be cleaned with a soft damp cloth, possibly soaked in soapy
water. Do not use any abrasive detergents and solvents.
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