Daikin Altherma 3 WS EWSAH06UD Series, Руководство по установке

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5 Piping installation
Installation manual
10
EWSAH/X06UD
Daikin Altherma 3 WS
4P675760-1C – 2023.02
NOTICE
For optimum sound reduction, carefully check if there is no
gap between the bottom frame and the floor.
4.3.2 To connect the drain hose to the drain
Condensate can form inside the unit during cooling operation or with
low central water loop temperatures. The top and backup heater
drain pans are connected to a drain hose inside the unit. You must
connect the drain hose to an appropriate drain according to the
applicable legislation. Route the drain hose through the rear panel,
towards the right side of the unit.
5 Piping installation
5.1 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 central water loop circuit. Do NOT use Zn-coated
piping, as this may lead to excessive corrosion.
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.
NOTICE
All piping MUST be installed according to section G3 of the
Building Regulations.
NOTICE
Circuit requirements. Make sure to comply with the fluid
pressure and fluid temperature requirements below. For
additional circuit requirements, see the installer reference
guide.
▪ Fluid pressure – Domestic hot water tank. The maximum fluid
pressure of the domestic hot water tank is 10 bar (=1.0 MPa), and
must be in accordance with the applicable legislation. Provide
adequate safeguards in the water circuit to ensure that the
maximum pressure is NOT exceeded (see
"5.3.2 To connect the
water piping for domestic hot water" [
4
13]). The minimum fluid
pressure to operate is 1 bar (=0.1 MPa).
▪ Fluid pressure – Space heating and central water loop circuit.
The maximum fluid pressure is:
▪ For the space heating circuit: 3 bar (0.3 MPa),
▪ For the central water loop ciruit: 16 bar (1.6 MPa).
▪ Fluid temperature. All installed piping and piping accessories
(valve, connections,…) MUST withstand the following
temperatures:
INFORMATION
The following figure is an example and may NOT
completely match your system layout
65°C
70°C
5.1.1 To check the water volume and flow rate
of the space heating circuit and the
central water loop 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 heating/cooling > Overshoot
(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 No minimum required flow
Cooling operation 10 l/min
Backup heater operation No minimum required flow during
heating
INFORMATION
The flow rate of the central water loop circuit can vary up to
10% as a result of the tolerance of the pressure
independent control valve (PICV).