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Piping installation
Installer reference guide
101
ERGA04~V3A+V37 + EHSH/X(B)04+08P30+50EF
Daikin Altherma 3 R ECH₂O
4P678716-1 – 2022.01
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
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:
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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 higher than the minimum
water volume, the internal water volume of the indoor unit NOT included:
If…
Then the minimum water volume
is…
Cooling operation
20 l
Heating operation
20 l
