Daikin ETSHB16P30EF Installer's Reference Manual page 88

8 | Piping installation
Installer reference guide
88
▪ Drainage – Low points. Provide drain taps at all low points of the system in order
to allow complete drainage of the water circuit.
▪ Drainage – Pressure relief valve. Connect the drain hose properly to the drain to
avoid water dripping out of the unit. See
4
drain" [ 84].
▪ Air vents. Provide air vents at all high points of the system, which must also be
easily accessible for servicing. An automatic air purge is provided in the indoor
unit. Check that the air purge is NOT tightened too much, so that automatic
release of air in the water circuit is possible.
▪ Zn-coated parts. NEVER use zinc coated parts in the water circuit. Because the
internal water circuit of the unit uses copper piping, excessive corrosion may
occur.
▪ Non-brass metallic piping. When using non-brass metallic piping, insulate the
brass and non-brass properly so that they do NOT make contact with each other.
This to prevent galvanic corrosion.
▪ Expansion vessel. A suitably sized expansion vessel must be installed in the
water circuit in accordance with the applicable legislation. No blocking elements
(shut-off valves or similar) are allowed between the expansion vessel and the
indoor unit.
▪ Magnetic filter/dirt separator. If the indoor unit is connected to a heating
system with radiators, steel pipes, or non-diffusion-proof floor heating pipes, it is
necessary to install a magnetic filter/dirt separator into the return flow of the
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
"7.4.4 To connect the drain hose to the
4
water" [ 56].
"6.4.4 DHW
EPRA14~18DAV3+W1 + ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH₂O
4P679467-1 – 2022.02