Commercial Heating | Gas Engineer | Vaillant |Gas Boiler Repair Services | Commercial Catering

Commercial Gas Systems Ltd

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Fault Finding & Boiler repair

FREE help and advice for customers, Paperless system, NO handwritten bits of paper, PDF documentation via your email, Service records, service reminders, appliance records, service and repair history, Gas Safety Certificates issued, PDF to your email on site, Email confirmation. Payment via web site, or BACS,

All engineers are fully qualified, Gas Safe Registered and very experienced plumbers. Over the years we have been providing plumbing and heating services for residents and local businesses in all areas of London. With all the qualifications and years of on the job plumbing experience, our plumbers and heating engineers can fix almost every type of plumbing, heating or boiler related problem. For our plumbers no job is too big or too small and every job gets treated with the same importance. Whether it is a general routine boiler check-up you require or a full blown burst pipe, we can help and we will be with you in no time. Our policy has always been to turn up when we say we will, only do jobs that need doing, do the jobs properly and to the highest standards. For more information or to request a plumbing job visit our website or give us a call.

Maintenance work Interval 

1 Ask the end user whether any significant problems occur when operating the product Annually 

2 Use the diagnostics system to check the product's fault history Annually 

3 Visually inspect whether the air/flue pipe and its opening have been installed correctly in accordance with the set-up instructions Annually 

4 Check that the unit has been installed correctly and the connections have been secured Annually 

5 Check all of the connections for tightness Annually 

6 Check that the condensate pipe is in good condition, that it is leak-tight and that the drain is correct Annually 

7 Check whether all of the externally routed condensate pipes are dimensioned correctly and have been insulated sufficiently (frost protection) Annually 

8 Check whether the gas flow rate corresponds with the specifications on the data plate and lies within the tolerances specified in these instructions Annually 

9 If the gas flow rate lies outside of the tolerances specified in these instructions, eliminate the fault in accordance with the regulations and the current technology Annually 

10 Check the general condition of the product and, if required, eliminate any faults that are found Annually 

11 Carry out the combustion analysis: Measure the CO content, CO₂ content and the CO/CO₂ ratio. For products with a rear air/flue connection: The combustion analysis can only be carried out when the unit casing has been removed; it is not necessary to test these products for flue gas recirculation Annually 

12 Check the product's recirculation at the supply air test point on the air/flue pipe. If required, inspect the entire air/flue system and, if necessary, correct the fault Annually 

13 Disconnect the product from the electrical installation Annually 

14 Check and, if required, correct the electrical installation Annually 

15 Remove the unit casing, check the condition of all of the functional components, in particular for leaks, corrosion, rust, etc. and, if required, repair any damage Annually 

16 Visual inspection of the heat exchanger and burner seals Annually 

17 Carefully clean the inside of the product: The air passages to the burner must be clear and clean Annually 

18 Close the installation's gas stopcock and, if required, service valves Annually 

19 Check the quality of the heating water: Clarity (clouding), correct inhibitor and pH value Annually 



20 Removing the gas-air mixture unit If required, at least every 5 years 23 

21 Checking the burner If required, at least every 5 years 24

22 Cleaning the condensate trap Annually 25 

23 Filling the condensate trap Annually 18

24 Cleaning the heat exchanger If required, at least every 5 years 

24 Appendix 0020238195_05 ecoTEC plus Installation and maintenance instructions 27 

25 Check and, if required, replace the insulating mat in the burner area If required, at least every 

5 years 26 Installing the gas-air mixture unit If required, at least every 5 years 25 

27 Reassemble the product After each time maintenance work is carried out 

28 Open the service valves, carry out the required leak-tightness test Annually 

29 Fill the product/heating installation to the filling pressure specified for the system Annually 

30 Connect the product to the electrical installation Annually 

31 Run the test operation on the product/heating installation including hot water generation (if available) and, if required, purge the product/heating installation Annually 

32 Record all of the analysis results in the Benchmark service record in these instructions Annually