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Piping installation
Installer reference guide
72
EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 2022.04
INFORMATION
The following figure is an example and may NOT completely match your system
layout
65°C
70°C
▪
Drainage – Low points.
Provide drain taps at all low points of the system in order
to allow complete drainage of the circuit.
▪
Drainage – Pressure relief valve (space heating/cooling circuit).
Connect the
drain hose properly to the drain to avoid water dripping out of the unit. See
"7.3.4 To connect the drain hose to the drain"
69].
▪
Zn-coated parts.
NEVER use Zn-coated parts in the fluid circuit. Because the
internal circuit of the unit uses copper piping, excessive corrosion may occur. Zn-
coated parts used in the central water loop circuit may lead to the precipitation
of certain components in the anti-freeze fluids corrosion inhibitor.
WARNING
Due to the presence of glycol, corrosion of the system is possible. Uninhibited glycol
will turn acidic under the influence of oxygen. This process is accelerated by the
presence of copper and high temperatures. The acidic uninhibited glycol attacks
metal surfaces and forms galvanic corrosion cells that cause severe damage to the
system. Therefore it is important that:
▪
the water treatment is correctly executed by a qualified water specialist,
▪
a glycol with corrosion inhibitors is selected to counteract acids formed by the
oxidation of glycols,
▪
no automotive glycol is used because their corrosion inhibitors have a limited
lifetime and contain silicates which can foul or plug the system,
▪
galvanized pipes are NOT used in glycol systems since the presence may lead to
the precipitation of certain components in the glycol's corrosion inhibitor.
