Strebel S-FX 125, Installation Operating & Maintenance Manual

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Gas/air ratio
With every service check and/or maintenance of the boiler always check the gas/air ratio by measuring the CO
2
percentage (flue gas) at the maximum and minimum load of the boiler. If necessary, adjust these values. For the
values see chapter 14.1.1.
Circulating Pumps (if wired directly into the S-FX boiler)
Check the electrical wiring inside the boiler for any abnormalities and flow through the boiler is correct.
When faults and abnormalities are found by the service technician during service and
maintenance and these are not repairable, this information should be reported to the owner/end-
user of the installation. Also, the owner/end-user should be advised how to fix these faults and
these faults should be reported in the service report / log file of the boiler.
During service and maintenance, the gas, supply air, flue gas and condensate connections are
disconnected, checked and replaced. Make sure that all these components are mounted
correctly before commissioning the boiler again.
Cleaning the combustion chamber and heat exchanger with acid or alkali products is prohibited.
WARNING