Daikin Altherma 3 R ECH2O, Installer'S Reference Manual

Page: 110 / 316

8 | Piping installation
Installer reference guide
110
ERLA11~W1 + EBSH/X(B)11+16P30+50DF
Daikin Altherma 3 R ECH₂O
4P663482-1A – 2021.11
▪ Storage tank – Water quality . Minimum requirements regarding the quality of
water used to fill the storage tank:
- Water hardness (calcium and magnesium, calculated as calcium carbonate):
≤3 mmol/l
- Conductivity: ≤1500 (ideal: ≤100) μS/cm
- Chloride: ≤250 mg/l
- Sulphate: ≤250 mg/l
- pH value: 6.5~8.5
For properties deviating from the minimum requirements, suitable conditioning
measures have to be taken.
▪ Storage tank – Shut-off valve . For easy filling and draining of the storage tank we
recommend to install a shut-off valve. See option kit: Fill and drain kit (165215)
▪ Thermostatic mixing valves. In accordance with the applicable legislation, it may
be necessary to install thermostatic mixing valves.
▪ Hygienic measures. The installation must be in compliance with the applicable
legislation and may require additional hygienic installation measures.
▪ Recirculation pump. In accordance with the applicable legislation, it may be
required to connect a recirculation pump in between the hot water end point
and the optional recirculation connection of the storage tank. See
"6.4.4 DHW
pump for instant hot water" [ 4 56].
c
d
a b
a Recirculation connection
b Hot water connection
c Shower
d Recirculation pump
8.5.2 To check the water volume and flow rate
To make sure that the unit operates properly:
▪ You MUST check the minimum water volume and the minimum flow rate.
Minimum water volume
Check that the total water volume in the installation is minimum 20 litres, the
internal water volume of the outdoor unit NOT included.
INFORMATION
In critical processes, or in rooms with a high heat load, extra water might be
required.