To Check The Water Volume And Flow Rate - Daikin ERGA04EAV37 Installer's Reference Manual

8 | Piping installation

8.5.2 To check the water volume and flow rate

Installer reference guide
104
system. If the indoor unit is connected to a domestic cold water supply
containing steel pipes, it is necessary to install a magnetic filter/dirt separator
before the cold water connection.
▪ Circulation stop valves. We recommend to use circulation stop valves at the
connections of the heat exchanger for domestic hot water. This minimizes heat
losses due to temperature-induced circulation in the connecting pipes.
▪ 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
pump for instant hot
a b
a Recirculation connection
b Hot water connection
c Shower
d Recirculation pump
To make sure that the unit operates properly:
▪ You MUST check the minimum water volume and the minimum flow rate.
Minimum water volume
For EHSH*, there are no requirements for the minimum water volume.
For EHSX*, check that the total water volume in the installation is minimum
10 litres.
INFORMATION
In critical processes, or in rooms with a high heat load, extra water might be
required.
4
water" [ 55].
c
d
ERGA04~08EAV3+V3A+V37 + EHSH/X(B)04+08P30+50EF
Daikin Altherma 3 R ECH₂O
4P678716-1A – 2022.07
"6.4.4 DHW