Preparing piping......................................................................................................................................................................

8.1.1

Circuit requirements ..............................................................................................................................................

8.1.2

Formula to calculate the expansion vessel pre-pressure......................................................................................

8.1.3

To check the water volume and flow rate of the space heating circuit and the central water loop circuit........

8.1.4

Changing the pre-pressure of the expansion vessel .............................................................................................

8.2

Connecting the central water loop piping .............................................................................................................................

8.2.1

About connecting the central water loop piping ..................................................................................................

8.2.2

Precautions when connecting the central water loop piping ...............................................................................

8.2.3

To connect the central water loop piping .............................................................................................................

8.2.4

To fill the central water loop circuit.......................................................................................................................

8.2.5

To insulate the central water loop piping..............................................................................................................

8.3

Connecting water piping ........................................................................................................................................................

8.3.1

About connecting the water piping .......................................................................................................................

8.3.2

Precautions when connecting the water piping....................................................................................................

8.3.3

To connect the water piping..................................................................................................................................

8.3.4

To connect the water piping for domestic hot water ...........................................................................................

8.3.5

To connect the recirculation piping.......................................................................................................................

8.3.6

To fill the space heating circuit ..............................................................................................................................

8.3.7

To fill the domestic hot water tank........................................................................................................................

8.3.8

To check for water leaks ........................................................................................................................................

8.3.9

To insulate the water piping ..................................................................................................................................

NOTICE

All piping MUST be installed according to section G3 of the Building Regulations.

INFORMATION

Also read the precautions and requirements in the

precautions" [

NOTICE

In case of plastic pipes, make sure they are fully oxygen diffusion tight according to

DIN 4726. The diffusion of oxygen into the piping can lead to excessive corrosion.

▪

Circuit types. Except for the refrigerant circuit, inside the unit 2 other circuits are

included:

The circuit connected to the common pump and the water source or outdoor