Daikin Altherma 3 H HT F Installer's Reference Manual page 87

EPRA14~18D + ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644738-1A – 2022.03
▪ 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.
▪ Valve – Change‑over time. When using a 2-way valve or a 3-way valve in the
water circuit, the maximum change-over time of the valve must be 60 seconds.
▪ Domestic hot water tank – Capacity. To avoid stagnation of water, it is
important that the storage capacity of the domestic hot water tank meets the
daily consumption of domestic hot water.
▪ Domestic hot water tank – After installation. Immediately after installation, the
domestic hot water tank must be flushed with fresh water. This procedure must
be repeated at least once a day the first 5 consecutive days after installation.
▪ Domestic hot water tank – Standstills. In cases where during longer periods of
time there is no consumption of hot water, the equipment MUST be flushed with
fresh water before usage.
▪ Domestic hot water tank – Disinfection. For the disinfection function of the
domestic hot water tank, see "10.5.6 Tank" [
▪ Domestic hot water tank kit – Clean pipes. Before installing the domestic hot
water tank kit, all piping and fittings must be flushed free of flux and debris.
Failure to do this may cause irreparable damage to the tank kit control valves.
Flush the system by opening the hot water tap.
▪ Domestic hot water tank kit – Pressure balancing. To prevent large pressure
differences at the taps and damage to the shower valve due to high‑pressure
cold water (5 bar), provide a dedicated 3.5‑bar feed to both cold water and hot
water taps. To do this, also connect the cold water supply for the cold water taps
to the pressure reducing valve of the domestic hot water tank kit.
f
e
a Cold water supply into house at 5 bar
b To 5 bar taps
c Pressure reducing valve (set to 3.5 bar) (part of the domestic hot water tank kit)
d Indoor unit
e Dedicated 3.5 bar feed – to/from DHW tank
f Dedicated 3.5 bar feed – cold water
g Cold water taps
h Hot water taps
i Shower
▪ Domestic hot water tank – Pressure relief valve. A pressure relief valve (part of
the inlet control group) with an opening pressure of 8 bar prevents excessive
water pressure in the water circuit.
▪ Domestic hot water tank – Pressure and temperature relief valve. The pressure
and temperature relief valve prevents excessive water pressure (≥10 bar) and
excessive water temperature (>95°C) in the domestic hot water tank.
▪ Thermostatic mixing valves. In accordance with the applicable legislation, it may
be necessary to install thermostatic mixing valves.
4
186].
a
b
g g
f
c
e
h h
d
e
8 Piping installation
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Installer reference guide
87