For the heating engineer
Installation and maintenance instructions
auroSTEP plus
Installation and maintenance instructions auroSTEP plus 0020077748_FT1 1
1 Notes on the documentation.........................2
1.1 Storage of the documents....................................2
1.2 Symbols used...........................................................2
1.3 Applicability of the manual...................................2
2 System description ........................................2
2.1 Identification plate..................................................2
2.2 CE mark .....................................................................2
2.3 Intended use.............................................................2
3 Safety instructions and regulations ............ 3
3.1 Safety instructions .................................................3
3.1.1 Solar cylinder unit...................................................3
3.1.2 Safety data sheet for solar fluid.........................4
3.2 Regulations...............................................................6
3.2.1 Overview of EU standards ....................................6
3.2.2 Regulations for Germany......................................7
4 Assembly .........................................................8
4.1 Installation location................................................8
4.2 Dimensions................................................................8
4.2.1 Toppling dimensions ..............................................8
4.3 Appliance and connection dimensions ..............9
4.3.1 Installing the collectors .........................................9
4.4 Transport to the installation location.............. 10
4.4.1 Transport in the packaging ................................ 10
4.4.2 Transport without packaging............................. 10
4.4.3 Transport without casing.................................... 10
4.4.4 Transport without insulation ...............................11
4.4.5 Fitting the insulation and the casing ................12
5 Installation..................................................... 12
5.1 Fitting the DHW supply lines...............................12
5.2 Fitting the solar connections ..............................12
5.3 Electrical installation............................................ 14
5.3.1 Regulations............................................................. 14
5.3.2 Electrical connection............................................ 14
6 Start-up...........................................................17
6.1 Filling the DHW system.........................................17
6.2 Filling and bleeding the post-heating
system.......................................................................17
6.3 Setting system parameters................................ 18
6.4 Equalising the pressure in the solar
heating system ..................................................... 20
6.5 Checking the solar heating system
for leaks....................................................................21
6.6 Setting the system parameters on the
controller..................................................................21
6.7 Setting the DHW thermostatic mixing valve...21
6.8 Handing over to the owner..................................21
8 Maintenance ................................................. 24
8.1 Cleaning the internal tank ................................. 24
8.2 Servicing the magnesium protection anode. 25
8.3 Checking the expansion relief valve ............... 26
8.4 Changing the solar fluid..................................... 26
8.5 Collectors ................................................................27
8.6 Replacement parts................................................27
8.7 Recommended maintenance checklist............27
10 Recycling and disposal................................ 29
10.1 Unit .......................................................................... 29
10.2 Solar collectors..................................................... 29
10.3 Solar fluid............................................................... 29
10.4 Packaging............................................................... 29
11 Customer service and guarantee............... 29
11.1 Vaillant customer service .................................. 29
11.2 Manufacturer's guarantee................................. 29
12 Technical data.............................................. 30
12.1 Cylinder unit VIH SN 350i.................................. 30
12.2 Sensor characteristics..........................................31
12.3 Flat collector VFK 135 D.......................................31
Contents
