Daikin ETSHB16P30EF Installer's Reference Manual page 87

EPRA14~18DAV3+W1 + ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH₂O
4P679467-1 – 2022.02
▪ Closed circuit. Use the indoor unit ONLY in a closed water system. Using the
system in an open water system will lead to excessive corrosion.
▪ Piping length. It is recommended to avoid long runs of piping between the
storage tank and the hot water end point (shower, bath,...) and to avoid dead
ends.
▪ Piping diameter. Select the water piping diameter in relation to the required
water flow and the available external static pressure of the pump. See
4
"16 Technical data" [
unit.
▪ Water flow. You can find the minimum required water flow for indoor unit
operation in the following table. In all cases, this flow needs to be guaranteed.
When the flow is lower, the indoor unit will stop operation and display error 7H.
Minimum required flow rate
25 l/min
▪ Field supply components – Water. Only use materials that are compatible with
water used in the system and with the materials used in the indoor unit.
▪ Field supply components – Water pressure and temperature. Check that all
components in the field piping can withstand the water pressure and water
temperature.
▪ Water pressure – Space heating/cooling circuit. The maximum water pressure is
3 bar (=0.3 MPa). Provide adequate safeguards in the water circuit to ensure that
the maximum pressure is NOT exceeded. The minimum water pressure to
operate is 1 bar (=0.1 MPa).
▪ Water pressure – Domestic hot water. The maximum water pressure is 10 bar.
Provide adequate safeguards in the DHW circuit to ensure that the maximum
pressure is NOT exceeded. The minimum water pressure to operate is 1 bar.
▪ Water pressure – Storage tank. The water inside the storage tank is not
pressurized. Therefore a visual check of the water level in the storage tank has to
be carried out annually, see
4
overview" [ 249].
▪ Water temperature. All installed piping and piping accessories (valve,
connections,...) MUST withstand the following temperatures:
INFORMATION
The following illustration is an example and might NOT match your system layout.
75°C
271] for the external static pressure curves of the indoor
"13.3.3 Yearly maintenance indoor unit:
89°C 75°C
M
8 Piping installation
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Installer reference guide
87