Vaillant ecoTEC VUW User Manual

Table of contents
3Installation and maintenance instructions ecoTEC 0020173113_01
10.13 Carrying out a full function test..................................41
10.13.1 Checking the heating mode ....................................... 42
10.13.2 Checking the hot water generation (VUW
boilers only) .................................................................... 42
10.13.3 Checking hot water generation
(VU boilers only)............................................................ 42
10.14 Final flush of the heating system ("hot") ............... 42
11 Adapting the boiler to the heating installation 43
11.1 Diagnosis codes – Overview ....................................... 43
11.1.1 Setting the heating partial load .................................47
11.1.2 Setting pump overrun time and pump operating
mode .................................................................................47
11.1.3 Setting the maximum flow temperature ..................47
11.1.4 Setting the return flow temperature control ..........47
11.1.5 Burner anti-cycling time ...............................................47
11.1.6 Setting the maintenance interval ............................. 48
11.1.7 Setting the by-pass valve ............................................ 48
11.2 Handing over the boiler to the operator ................. 49
12 Inspection and maintenance ................................... 50
12.1 Inspection and maintenance intervals ..................... 50
12.1.1 General inspection and maintenance instructions 50
12.1.2 Safety instructions .........................................................51
12.1.3 Checking the CO/CO
2
ratio and the CO
2
concentration ...................................................................51
12.1.4 Adjusting the CO
2
concentration (or the air ratio) .52
12.2 Inspection and maintenance work steps ................. 54
12.2.1 Filling the boiler and the heating installation ........ 55
12.2.2 Draining the boiler ........................................................ 55
12.2.3 Draining the entire heating installation .................. 55
12.3 Carrying out maintenance work ................................ 55
12.3.1 Removing the compact thermal module ................. 55
12.3.2 Cleaning the heat exchanger ..................................... 56
12.3.3 Checking the burner .................................................... 56
12.3.4 Cleaning the condensate trap .....................................57
12.3.5 Cleaning the filter in the cold water inlet (VUW
boilers only) .....................................................................57
12.3.6 Installing the compact thermal module .................. 58
12.3.7 Checking the charge pressure of the expansion
vessel ............................................................................... 58
12.4 Checking the gas flow pressure ................................ 59
12.4.1 Checking CO
2
content .................................................. 59
13 Troubleshooting ...........................................................60
13.1 Contact Vaillant Service Solutions
(0870 6060 777) ..........................................................60
13.2 Performing diagnostics ............................................... 60
13.2.1 Calling up Live Monitor (status codes) .................... 60
13.2.2 Status codes – Overview ............................................. 60
13.2.3 Status codes – Overview ............................................. 60
13.2.4 Service messages ...........................................................61
13.2.5 Calling up diagnosis levels ............................................61
13.2.6 Reading off the fault codes ..........................................61
13.2.7 Querying the fault memory ..........................................61
13.2.8 Resetting the fault memory .........................................61
13.2.9 Overview of fault codes ................................................62
13.3 Running test programs .................................................63
13.4 Resetting parameters to factory settings ................63
14 Replacing components .............................................. 64
14.1 Preparing for and completing replacement work . 64
14.1.1 Preparing for replacement work ............................... 64
14.1.2 Completing replacement work ................................... 64
14.2 Replacing the burner ................................................... 64
14.3 Replacing the fan or the gas valve ........................... 64
14.4 Replacing the expansion vessel................................. 65
14.5 Replacing the heat exchanger ................................... 66
14.6 Replacing the PCB and/or the display ......................67
14.6.1 Replacing either the display or the PCB ..................67
14.6.2 Replacing the PCB and the display at the same
time ...................................................................................67
15 Decommissioning ........................................................68
15.1 Temporarily shutting down the boiler ..................... 68
15.2 Taking the boiler permanently out of service ....... 68
15.3 Disposing of the boiler ................................................ 68
16 Guarantee and customer service ........................... 68
16.1 Factory guarantee .........................................................68
16.2 Vaillant Service .............................................................. 68
17 Technical data .............................................................. 69
18 Glossary ..........................................................................70
19 Appendix ..........................................................................71
Index ...........................................................................................74

Vaillant ecoTEC VUW Specifications

General

Mounting	Wall-mounted
Type	Combi Boiler
Fuel Type	Natural Gas
DHW Flow Rate	Up to 14.3 l/min (depending on model)
Dimensions (H x W x D)	720 mm x 440 mm x 338 mm (varies by model)
Heating Capacity	Up to 35 kW (depending on model)
Warranty	2-5 years (depending on installer and registration)
Heating Output	35kW (depending on model)