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Vaillant ecoTEC SERIES - Page 3

Vaillant ecoTEC SERIES
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3Instructions for installation and servicing ecoTEC 839592_12
Contents
6 Functional checks (commissioning part II). . 39
6.1 Functional checks . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.1.1 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.1.2 Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
6.1.3 Water heating (combination boilers only) . . . . . 39
6.1.4 Final flush of the heating system (“hot”) . . . . . 39
6.2 Handing over to the user . . . . . . . . . . . . . . . . . . . 40
6.3 Factory guarantee . . . . . . . . . . . . . . . . . . . . . . . . . 40
7 Inspection and maintenance . . . . . . . . . . . . . 41
7.1 Inspection and maintenance intervals . . . . . . . . 41
7.1.1 General inspection and maintenance
instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
7.1.2 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . 42
7.1.3 Checking the CO
2
concentration . . . . . . . . . . . . . 42
7.1.4 Adjusting the CO
2
concentration
(or the air ratio) . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
7.1.5 Inspection and maintenance work steps . . . . . . 44
7.2 Servicing the burner module . . . . . . . . . . . . . . . . 45
7.2.1 Removing the burner module . . . . . . . . . . . . . . . 45
7.2.2 Cleaning the integral condensation heat
exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.3 Checking the burner . . . . . . . . . . . . . . . . . . . . . . . 46
7.2.4 Refitting the burner module . . . . . . . . . . . . . . . . 46
7.3 Cleaning the condensate siphon . . . . . . . . . . . . . 47
7.4 Checking the expansion vessel . . . . . . . . . . . . . . 48
7.5 Recommissioning the boiler. . . . . . . . . . . . . . . . . 48
7.6 Test operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
8 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1 Logical fault finding procedure . . . . . . . . . . . . . . 49
8.1.1 Status codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1.2 Diagnostic codes . . . . . . . . . . . . . . . . . . . . . . . . . . 49
8.1.3 Fault codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.1.4 Fault memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
8.2 Test programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
8.3 Resetting parameter to factory settings . . . . . . 54
9 Parts replacement . . . . . . . . . . . . . . . . . . . . . 54
9.1 Safety instructions . . . . . . . . . . . . . . . . . . . . . . . . 54
9.2 Replacing burner . . . . . . . . . . . . . . . . . . . . . . . . . . 55
9.3 Replacing fan or gas valve . . . . . . . . . . . . . . . . . . 55
9.4 Replacing expansion vessel . . . . . . . . . . . . . . . . . 56
9.5 Replacing primary heat exchanger . . . . . . . . . . 56
9.6 Replacing electronics and display . . . . . . . . . . . 57
10 Recycling and disposal . . . . . . . . . . . . . . . . . . 58
11 Vaillant service . . . . . . . . . . . . . . . . . . . . . . . . 58
Appendix
EG declaration of conformity . . . . . . . . . . . . . . . . . . . . . 59
Benchmark gas boiler commissioning checklist . . . . . 60

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