Piping Installation; Preparing Piping; To Check The Water Volume And Flow Rate Of The Space Heating Circuit And Brine Circuit; Connecting The Brine Piping - Daikin Altherma 3 GEO EGSAH06DA9W Installation Manual

4 Piping installation

4 Piping installation
4.1

Preparing piping

WARNING
It is the responsibility of the installer to ensure the
compatibility of field piping with the used anti-freeze fluid in
the brine circuit. Do NOT use Zn-coated piping, as this
may lead to excessive corrosion. See also
circuit" [ 4 11].
brine
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.
4.1.1 To check the water volume and flow rate
of the space heating circuit and brine
circuit
Minimum water volume
Check that the total water volume per circuit in the installation is
minimum 20 litre, the internal water volume of the indoor unit NOT
included.
INFORMATION
If a minimum heating load of 1 kW can be guaranteed and
setting [4.B] Space
(overview field setting [9‑04]) is 4°C, the minimum water
volume can be lowered to 10 litre.
INFORMATION
In critical processes, or in rooms with a high heat load,
extra water might be required.
NOTICE
When circulation in each space heating/cooling loop is
controlled by remotely controlled valves, it is important that
the minimum water volume is guaranteed, even if all of the
valves are closed.
Minimum flow rate
Minimum required flow rate
Heat pump operation
Cooling operation
Backup heater operation
4.2

Connecting the brine piping

4.2.1

To connect the brine piping

NOTICE
Do NOT use excessive force when connecting the field
piping and make sure the piping is aligned properly.
Deformation of the piping can cause malfunctioning of the
unit.
Installation manual
10
"4.2.4 To fill the
heating/cooling > Overshoot
No minimum required flow
10 l/min
No minimum required flow during
heating
b
a
a Brine OUT (Ø28 mm)
b Brine IN (Ø28 mm)
NOTICE
To facilitate service and maintenance, it is recommended
to install shut-off valves as close as possible to the inlet
and outlet of the unit.
4.2.2

To connect the brine level vessel

The brine level vessel (delivered as accessory) must be installed on
the brine side of the heat pump system. A safety valve is included
with the vessel. The vessel serves as a visual indicator of the brine
level of the system. Air trapped in the system is collected by the
vessel, causing the level of brine in the vessel to decrease.
1 Install the brine level vessel as the highest point in the brine
circuit on the entering brine piping.
2 Mount the included safety valve on top of the vessel.
3 Install a shut-off valve (field supplied) below the vessel.
NOTICE
If it is not possible to install the brine level vessel as the
highest point in the circuit, install an expansion vessel (field
supply) and install the safety valve in front of the expansion
vessel. Failure to observe this instruction may result in
malfunctioning of the unit.
a
a Brine level vessel (accessory)
b Expansion vessel (field supply, in case brine level vessel
cannot be installed as the highest point)
If the level of brine in the vessel is lower than 1/3, fill the vessel with
brine:
4 Close the shut-off valve below the vessel.
5 Remove the safety valve on top of the vessel.
6 Top up the vessel with brine until it is approximately 2/3 filled.
b
EGSAH/X06+10DA9W(G)
Daikin Altherma 3 GEO
4P569811-1C – 2020.07