Vaillant ecoTEC pro VUW 6/5-3 Series Installation And Maintenance Instructions Manual page 56

Replacing the burner ........................................................... 37
Replacing, fan ..................................................................... 38
Replacing, gas valve ........................................................... 38
Replacing, heat exchanger.................................................. 38
Replacing, PCB and display................................................ 39
Replacing, PCB or display................................................... 39
S
Safety devices ..................................................................... 12
Scale ................................................................................... 20
Scale deposition .................................................................. 20
Scope of delivery................................................................. 13
Serial number ...................................................................... 12
Service message................................................................. 37
Setting, CO₂ content............................................................ 30
Setting, maintenance interval .............................................. 32
Setting, pump output ........................................................... 32
Side section, installing......................................................... 19
Side section, removing ........................................................ 19
Spare parts.......................................................................... 37
Status codes........................................................................ 26
Switching off ........................................................................ 39
T
Technical data ....................................................................... 8
Treating the heating water................................................... 27
U
Unit connection piece for the air/flue pipe, 80/125 mm
diameter .............................................................................. 23
Unit connection piece for the air/flue pipe, replacing .......... 23
Unit connection piece, removing ......................................... 23
V
Validity of the instructions.................................................... 11
W
Weight ................................................................................. 18
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Installation and maintenance instructions ecoTEC pro 0020244995_04