Vaillant ecoTEC plus - Page 3

Contents
3Instructions for installation and servicing ecoTEC 839592_13
6 Functional checks
(commissioning part II) ......................................... 47
6.1 Functional checks .....................................................47
6.1.1 Procedure ...................................................................47
6.1.2 Heating ........................................................................47
6.1.3 Water heating (combination boilers only) ..........47
6.1.4 Final flush of the heating system (“hot”) ...........47
6.2 Handing over to the user ....................................... 48
6.3 Factory guarantee ................................................... 48
7 Inspection and maintenance .............................. 49
7.1 Inspection and maintenance intervals................ 49
7.1.1 General inspection and maintenance
instructions ............................................................... 49
7.1.2 Safety instructions .................................................. 50
7.1.3 Checking the CO2 concentration ......................... 50
7.1.4 Adjusting the CO2 concentration
(or the air ratio) ..........................................................51
7.1.5 Inspection and maintenance work steps ............53
7.2 Servicing the burner module ................................ 54
7.2.1 Removing the burner module ............................... 54
7.2.2 Cleaning the integral condensation heat
exchanger ...................................................................55
7.2.3 Checking the burner ............................................... 56
7.2.4 Refitting the burner module ................................. 56
7.3 Cleaning the condensate siphon ...........................57
7.4 Checking the expansion vessel .............................57
7.5 Recommissioning the boiler ...................................57
7.6 Test operation ........................................................... 58
8 Troubleshooting .......................................................59
8.1 Logical fault finding procedure .............................59
8.1.1 Status codes ...............................................................59
8.1.2 Diagnostic codes ...................................................... 60
8.1.3 Fault codes .................................................................63
8.1.4 Fault memory ............................................................ 64
8.2 Test programs ........................................................... 66
8.3 Resetting parameter to factory settings ............ 66
9 Parts replacement ..................................................67
9.1 Safety instructions ...................................................67
9.2 Replacing burner ......................................................67
9.3 Replacing fan or gas valve .....................................67
9.4 Replacing expansion vessel ................................... 68
9.5 Replacing primary heat exchanger ..................... 69
9.6 Replacing electronics and display ........................70
10 Recycling and disposal ........................................... 71
11 Vaillant service ........................................................72
12 EC declaration of conformity .............................. 73