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Piping installation
Installer reference guide
104
ERGA04~V3A+V37 + EHSH/X(B)04+08P30+50EF
Daikin Altherma 3 R ECH₂O
4P678716-1A – 2022.07
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.
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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
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Conductivity: ≤1500 (ideal: ≤100) μS/cm
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Chloride: ≤250 mg/l
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Sulphate: ≤250 mg/l
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pH value: 6.5~8.5
For properties deviating from the minimum requirements, suitable conditioning
measures have to be taken.
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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)
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Thermostatic mixing valves.
In accordance with the applicable legislation, it may
be necessary to install thermostatic mixing valves.
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Hygienic measures.
The installation must be in compliance with the applicable
legislation and may require additional hygienic installation measures.
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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
55].
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
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.