Piping Installation; Preparing Water Piping; Water Circuit Requirements - Daikin EPRA18DAV3 Installer's Reference Manual

7 Piping installation

In this chapter

7.1 Preparing water piping

7.1.1 Water circuit requirements

EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
Daikin Altherma 3 H HT F
4P587502-1B - 2020.12
7.1 Preparing water piping ...........................................................................................................................................................
7.1.1 Water circuit requirements ...................................................................................................................................
7.1.2 Formula to calculate the expansion vessel pre-pressure......................................................................................
7.1.3 To check the water volume and flow rate.............................................................................................................
7.1.4 Changing the pre-pressure of the expansion vessel .............................................................................................
7.1.5 To check the water volume: Examples ..................................................................................................................
7.2 Connecting water piping ........................................................................................................................................................
7.2.1 About connecting the water piping .......................................................................................................................
7.2.2 Precautions when connecting the water piping....................................................................................................
7.2.3 To connect the water piping..................................................................................................................................
7.2.4 To connect the recirculation piping.......................................................................................................................
7.2.5 To fill the water circuit ...........................................................................................................................................
7.2.6 To protect the water circuit against freezing ........................................................................................................
7.2.7 To fill the domestic hot water tank........................................................................................................................
7.2.8 To insulate the water piping ..................................................................................................................................
INFORMATION
Also read the precautions and requirements in the
4
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.
▪ Connecting piping - Legislation. Make all piping connections in accordance with
the applicable legislation and the instructions in the "Installation" chapter,
respecting the water inlet and outlet.
▪ Connecting piping - Force. Do NOT use excessive force when connecting the
piping. Deformation of the piping can cause malfunctioning of the unit.
▪ Connecting piping - Tools. Only use appropriate tooling to handle brass, which is
a soft material. If NOT, pipes will get damaged.
▪ Connecting piping - Air, moisture, dust. If air, moisture or dust gets into the
circuit, problems may occur. To prevent this:
- Only use clean pipes
- Hold the pipe end downwards when removing burrs.
- Cover the pipe end when inserting it through a wall, to prevent dust and/or
particles from entering the pipe.
- Use a decent thread sealant to seal connections.
▪ Insulation. Insulate up to the base of the heat exchanger.
▪ Freeze. Protect against freezing.
▪ Closed circuit. Use the indoor unit ONLY in a closed water system. Using the
system in an open water system will lead to excessive corrosion.
6].
7 Piping installation
|
"1 General safety
Installer reference guide
73
73
75
75
78
78
79
79
79
79
82
82
82
85
86
73