Technical data

Contents
3Installation and maintenance instructions ecoTEC plus 937 0020031552_06
6.5 Flushing the system for the first time ("cold") ..41
6.6 Filling the condensate drain trap ..........................41
6.7 Setting the pump output .........................................41
6.8 Adjusting the bypass ................................................41
6.9 Checking the gas setting ....................................... 42
6.9.1 Checking for tightness of the flue gas
installation and flue gas recirculation ................ 42
6.9.2 Checking the gas flow rate ....................................43
6.9.3 Checking the gas inlet working pressure ...........43
6.10 Assembling the front panel ................................... 44
6.11 Adjusting the central heating system (range
rating) ......................................................................... 44
6.12 Converting the gas type ........................................ 45
7 Commissioning Part II: Functional checks ... 45
7.1 Functional checks .................................................... 45
7.1.1 Method of procedure .............................................. 45
7.1.2 Heating ....................................................................... 45
7.1.3 Hot water operation ............................................... 46
7.1.4 Storage tank charging ............................................ 46
7.1.5 Conclusive flushing of the heating system
("hot") ..........................................................................47
7.2 Briefing users ............................................................47
7.3 Factory guarantee ................................................... 48
8 Inspection and maintenance .............................. 48
8.1 Inspection and maintenance intervals ............... 48
8.1.1 General inspection and maintenance
instructions ............................................................... 49
8.1.2 Safety instructions .................................................. 49
8.1.3 Checking the CO
2
concentration .......................... 50
8.1.4 Adjusting the CO
2
concentration
(or the air ratio) .........................................................51
8.1.5 Inspection and maintenance work steps ............52
8.2 Maintaining the compact thermal module .........53
8.2.1 Removing the compact thermal module ............53
8.2.2 Cleaning the integral condensation heat
exchanger .................................................................. 54
8.2.3 Checking the burner ............................................... 54
8.2.4 Installing the compact thermal module ............. 54
8.3 Cleaning the condensate trap .............................. 55
8.4 Cleaning strainer in cold water supply .............. 56
8.5 Checking filling pressure of the expansion
vessel of the combination boiler ......................... 56
8.6 Checking filling pressure of the expansion
vessel of the shift load storage tank ...................57
8.7 Re-commissioning the combination boiler .........57
8.8 Test mode ...................................................................57
9.1 Logical fault finding procedure ............................ 58
9.1.1 Status codes ............................................................. 58
9.1.2 Diagnostic codes ...................................................... 59
9.1.3 Error codes .................................................................62
9.1.4 Fault memory ............................................................62
9.2 Test programmes .................................................... 65
9.3 Resetting the parameters to factory settings . 65
10 Replacing components ......................................... 65
10.1 Safety instructions .................................................. 65
10.2 Replacing the burner .............................................. 66
10.3 Replacing the fan or the gas valve .................... 66
10.4 Replacing the expansion vessel ............................67
10.5 Replacing the primary heat exchanger ............. 68
10.6 Replacing the expansion vessel of the shift
load storage tank ..................................................... 69
10.7 Replacing the storage tank pump of the shift
load storage tank ..................................................... 69
10.8 Replacing the aqua sensor .................................... 70
10.9 Replacing the electronics on the shift load
storage tank ................................................................71
10.10 Replacing the electronics and display on the
combi-heater ...............................................................71
11 Recycling and disposal .........................................72
12 Vaillant service ........................................................72
EC declaration of conformity ............................................73