8
|
Piping installation
Installer reference guide
73
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620241-1 – 2020.06
8 Piping installation
In this chapter
8.1
Preparing water piping ...........................................................................................................................................................
73
8.1.1
Water circuit requirements ...................................................................................................................................
73
8.1.2
Formula to calculate the expansion vessel pre-pressure......................................................................................
76
8.1.3
To check the water volume and flow rate.............................................................................................................
76
8.1.4
Changing the pre-pressure of the expansion vessel .............................................................................................
79
8.1.5
To check the water volume: Examples ..................................................................................................................
79
8.2
Connecting water piping ........................................................................................................................................................
80
8.2.1
About connecting the water piping .......................................................................................................................
80
8.2.2
Precautions when connecting the water piping....................................................................................................
80
8.2.3
To connect the water piping..................................................................................................................................
80
8.2.4
To protect the water circuit against freezing ........................................................................................................
82
8.2.5
To fill the water circuit ...........................................................................................................................................
85
8.2.6
To fill the domestic hot water tank........................................................................................................................
85
8.2.7
To insulate the water piping ..................................................................................................................................
86
8.1 Preparing water piping
8.1.1 Water circuit requirements
INFORMATION
Also read the precautions and requirements in the
"2 General safety
precautions"
[
4
9].
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.
▪
Freeze.
Protect against freezing.
▪
Closed circuit.
Use the outdoor unit ONLY in a closed water system. Using the
system in an open water system will lead to excessive corrosion.
▪
Piping length.
It is recommended to avoid long runs of piping between the
domestic hot water tank and the hot water end point (shower, bath,…) and to
avoid dead ends.