Appendix; A Inspection And Maintenance Work - Overview - Vaillant ecoTEC plus VU 446/5-5 (H-GB) Installation And Maintenance Instructions Manual

Appendix

Inspection and maintenance work – Overview
A
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 required intervals listed in the table. Carry out the preparatory work each time before inspection/maintenance work is car-
ried out, and carry out the completion work each time after the inspection/maintenance work is carried out.
Note
For those appliances which are not part of an annual service agreement/policy, maintenance must be carried out
at least every 5 years.
# 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 Check the air/flue pipe for leak-tightness and correct fastening. Make sure
that it is not blocked or damaged and has been installed in accordance
with the relevant set-up instructions
5 Check that the unit has been installed correctly and the connections have
been secured
6 Check that the condensate pipe is in good condition, that it is leak-tight
and that the drain is correct
7 Check whether all of the externally routed condensate pipes are dimen-
sioned correctly and have been insulated sufficiently (frost protection)
8 Check the gas connection pressure at maximum heat input. If the gas
connection pressure is not within the correct range, carry out mainten-
ance work
9 Check the general condition of the product and, if required, eliminate any
faults that are found
10 Carry out the combustion analysis: Measure the CO content, CO₂ content
and the CO/CO₂ ratio and readjust this if necessary. Logging the meas-
urement
11 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
12 Disconnect the product from the electrical installation
13 Check and, if required, correct the electrical installation
14 Remove any dirt from the product and vacuum chamber
15 Visually check the heat cell to ascertain its condition and detect any cor-
rosion, rust or damage, and carry out maintenance work, if required
16 Check that the gas stopcock and service valves function correctly
17 Check the quality of the heating water: Clarity (clouding), correct inhibitor
and pH value. Log the values in a system book. If required, use water
treatment to correct the water hardness
18 Removing the compact thermal module
19 Checking the burner
20 Check all seals and the insulating mat in the combustion area. Replace
the seals or insulating mat if they are damaged. Replace the burner door
seal after each time it is opened and, accordingly, each time maintenance
work is carried out
21 Cleaning the heat exchanger
22 Cleaning the condensate siphon
23 Installing the compact thermal module
24 Checking the pre-charge pressure of the external expansion vessel
25 Cleaning the filter in the dynamic air separation system
26 Cleaning the rainwater collector's draining circuit
27 Cleaning the low loss header
54
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
at regular intervals
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