Daikin Altherma 3 WS, Руководство по установке для специалистов

Страница: 74 / 260

8 | Piping installation
Installer reference guide
74
EWSAH/X06D
Daikin Altherma 3 WS
4P675764-1 – 2022.04
8.1.3 To check the water volume and flow rate of the space heating circuit and the central water
loop circuit
The unit does not have an integrated expansion vessel, but a field supplied
expansion vessel must be installed in the central water loop circuit.
To make sure that the unit operates properly:
▪ You must check the minimum water volume.
▪ You might need to adjust the pre-pressure of the expansion vessel.
▪ You must check the total space heating water volume in the unit.
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.
M2 M1
a
c
a
M3
a
b
d
d
a External room thermostat
b Remote outdoor sensor
c By-pass valve (field supply)
d Shut-off valve
Minimum flow rate
Minimum required flow rate
Heat pump operation No minimum required flow
Cooling operation 10 l/min