Technical data
Operation
36 Installation and maintenance instructions ecoTEC plus 0020116700_06 
9
9 Operation
The Vaillant ecoTEC plus boiler is fitted with a digital infor-
mation and analysis system (DIA). If additional settings are 
required, which have not been configured using the installa-
tion assistant, you can view and modify further parameters 
using the DIA.
The operating concept and operation of the boiler is 
described in the ¬operating instructions of the boiler. The 
read-off and setting facilities of the operator level are also 
described in the ¬operating instructions.
The following overview shows the read-off and setting facili-
ties of the installer level.
9.1  Calling up the installer level 
b
 Caution.
Risk of damage caused by incorrect han-
dling.
Incorrect settings at installer level can 
cause damage to the heating installation.
 > You should only access installer level if 
you are an approved competent person.
Installer level is secured against unauthorised access with a 
password, as incorrect parameter settings at this level can 
cause functional faults and damage to the heating installa-
tion.
 > Press the left 
 and right selection buttons 
 ("i") simultaneously
The following menu appears on the display.
 > Scroll using the minus button 
 or the plus but-
ton 
 until the menu point "installer level" 
appears.
 > Press the right selection button 
 to select the 
menu point.
"Enter code" and the value "00" appear in the display.
 > Select the value 17 (code) using the minus button 
 or the plus button  .
 > Press the right selection button 
 to confirm 
the entered code.
The installer level appears with a selection of menu points.
i
  In the following, a path specification at the 
beginning of an action instruction specifies how 
to access this function in the installer level, e.g. 
Menu ¬ Installer level ¬ Test programs ¬ 
Test programs.
i
  If you exit the installer level and then access it 
again within 15 minutes, you do not have to 
enter the code again.










