Appendix; A Inspection And Maintenance Work - Vaillant ecoTEC sustain 24 Installation And Maintenance Instructions Manual

Appendix

A Inspection and maintenance work
The table below lists the manufacturer requirements with respect to minimum inspection and maintenance intervals. If na-
tional regulations and directives require shorter inspection and maintenance intervals, you should observe these instead of
the intervals listed. Each time inspection and maintenance work is carried out, carry out the required preparatory and com-
pletion work.
# Maintenance work
1 Record all of the analysis results in the Benchmark Checklist in these
instructions
2 Ask the end user whether any significant problems occur when operating
the product
3 Use the diagnostics system to check the product's fault history
4 Visually inspect whether the air/flue pipe and its opening have been in-
stalled correctly in accordance with the set-up instructions
5 Check that the unit has been installed correctly and the connections have
been secured
6 Check all of the connections for tightness
7 Check that the condensate pipe is in good condition, that it is leak-tight
and that the drain is correct
8 Check whether all of the externally routed condensate pipes are dimen-
sioned correctly and have been insulated sufficiently (frost protection)
9 Check the general condition of the product and, if required, eliminate any
faults that are found
10 Visually check the heat cell to ascertain its condition and detect any cor-
rosion, rust or damage, and carry out maintenance work, if required
11 Check whether the gas flow rate corresponds with the specifications on
the data plate and lies within the tolerances specified in these instructions
12 If the gas flow rate lies outside of the tolerances specified in these in-
structions, eliminate the fault in accordance with the regulations and the
current technology
13 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 recir-
culation
14 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, cor-
rect the fault
15 Disconnect the product from the electrical installation
16 Check and, if required, correct the electrical installation
17 Close the installation's gas stopcock and, if required, service valves
18 Checking the admission pressure of the expansion vessel
19 Checking the insulating mats in the combustion area and replacing dam-
aged insulating mats
20 Cleaning the heat exchanger
21 Checking the burner
22 Cleaning the condensate siphon
23 Cleaning the strainer in the cold water inlet
24 Check the impeller sensor for dirt/damage
25 If the water volume is insufficient (domestic hot water) or the outlet tem-
perature is insufficient, check the secondary heat exchanger
26 Opening the service valves
27 Check the quality of the heating water: Clarity (clouding), correct inhibitor
and pH value
28 Filling and purging the heating installation
29 Starting a test operation after maintenance work
30 Visually check the ignition and burner behaviour
31 Measure the CO content, CO₂ content and the CO/CO₂ ratio again
44
Interval
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
Annually
at regular intervals
at regular intervals
at regular intervals
at regular intervals
Annually
at regular intervals
at regular intervals
at regular intervals
Annually
Annually
at regular intervals
Annually
Annually
Annually
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