Inspections/Maintenance work carried out im-properly can result in leakages and
explosion.
The boiler may only be inspected/maintained by a competent person.
All service work must be carried out by a competent person in accordance with the Gas safety,
installation and use regulations. In the UK this is considered to be a person approved at the time
by the Health and Safety Executive.
In addition 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 must be assessed as competent in
the use of a flue gas analyser and the interpretation of the results.
● The flue gas analyser used must be one meeting the requirements of BS7927 or
BS-EN50379-3 and be cali-brated in accordance with the analyser manufactur-ers’
requirements.
● Competence can be demonstrated by satisfactory completion of the relevant ACS
standard assessment, which covers the use of electronic portable flue gas analysers’ in
accordance with BS 7967, parts 1 to 4.
● The flue gas analyser is set to the correct fuel setting.
NOTE:
Safe combustion can only be verified by meas-uring CO/CO2ratio. This must not exceed
the value shown in table 9.1.
We recommend the conclusion of an inspection and maintenance contract with an approved
company or in-staller. The inspection serves to determine the actual condition of the respective
boiler and compare it with the specified condition. This is done by measuring, checking and
observing.
Maintenance is required in order to eliminate any devia-tions of the actual condition from the
specified condi-tion. This normally is done by cleaning, adjustment and, if necessary, replacing
individual components that are subject to wear. You must carry out an annual inspec-tion of the
Vaillant ecoTEC.
It is possible to perform a quick, accurate inspection without removing components by carrying
out the sim-ple visual checks indicated in table 8.2 and performing a flue gas measurement.
The maintenance intervals (at least once every 5 years) and their scope are determined by the
heating engineer based on the condition of the boiler found during the in-spection.
All inspection and maintenance work should be per-formed in the order specified in table 8.2.
WARNING:
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