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8
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Piping installation
8 Piping installation
In this chapter
8.1 Preparing water piping
8.1.1 Water circuit requirements
Installer reference guide
62
8.1
Preparing water piping ...........................................................................................................................................................
8.1.1
Water circuit requirements ...................................................................................................................................
8.1.2
Formula to calculate the expansion vessel pre-pressure......................................................................................
8.1.3
To check the water volume and flow rate.............................................................................................................
8.1.4
Changing the pre-pressure of the expansion vessel .............................................................................................
8.1.5
To check the water volume: Examples ..................................................................................................................
8.2
Connecting water piping ........................................................................................................................................................
8.2.1
About connecting the water piping .......................................................................................................................
8.2.2
Precautions when connecting the water piping....................................................................................................
8.2.3
To connect the water piping..................................................................................................................................
8.2.4
To protect the water circuit against freezing ........................................................................................................
8.2.5
To fill the water circuit ...........................................................................................................................................
8.2.6
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.
▪
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.
9].
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"2 General safety
EWAA011~016DA + EWYA009~016DA
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P620242-1 - 2020.06
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