Water Connection; Connecting Hydraulic Lines - Daikin Altherma 3 H HT ECH2 O Referenzhandbuch Für Den Monteur

3.6

Water connection

Important information
CAUTION
If the indoor unit is connected to a heating system with
steel pipes or radiators or non-diffusion-proof floor heat-
ing pipes, slurry and swarf could enter the hot water stor-
age tank and cause blockages, local overheating or cor-
rosion damage.
▪ Rinse supply lines before filling the device.
▪ Rinse out the heat distribution network (in the existing
heating system).
▪ Install a dirt filter or sludge separator in the heating re-
turn flow (see Chap.
CAUTION
If the indoor unit is connected to a cold water line where
steel pipes are used, chips can get into the stainless steel
corrugated pipe heat exchanger and remain there. This
can lead to contact corrosion damage and subsequently to
leakage.
▪ Flush the feed pipes before filling the heat exchanger.
▪ Install the dirt filter in the cold water supply (e.g. SAS 1
or SAS 2).
CAUTION: BIV ONLY
If the heat exchanger for pressurised solar system char-
ging (see Chap. 3.1, items 8 + 9) is connected to an ex-
ternal heater (e.g. wood-burning boiler), the indoor unit
can be damaged or destroyed due to an excessively high
inflow temperature at these connections.
▪ The inflow temperature of the external heater should
be limited to max. 95 °C.
CAUTION
Corrosion may be caused by air entering the heating water
network and by a quality of the heating water that does not
comply with the requirements in accordance with
Chap. 1.2.5. Corrosion products (particles) thus created
may clog pumps and valves and cause malfunctions.
▪ Device may not be connected by permeable, flexible
lines.
INFORMATION
In accordance with EN 12828, a safety valve that limits the
maximum permissible operating pressure in the heating
system must be installed on or in the immediate vicinity of
the heat generator. There may not be any hydraulic block-
ing elements between the heat generator and the safety
valve.
Any steam or heating water that may escape must be
drained by a suitable blow-off line with constant gradient in
a frost-protected, safe and observable manner.
A diaphragm expansion vessel suitably sized and preset
for the heating system must be connected to the Daikin
Altherma 3 H HT ECH O. There may not be any hydraulic
2
blocking elements between the heat generator and the dia-
phragm expansion vessel.
We recommend installing a mechanical pressure gauge for
filling the heating system.
▪ For potable water lines, observe the provisions of EN 806,
DIN 1988 and the additional applicable national regulations for
potable water installation.
Daikin Altherma ETS(X/H)(B)-D
Heat pump (indoor unit) with integrated heat accumulator
008.1447299_00 – 06/2019 – EN
1.2.6).
3
▪ Install the indoor unit close to the withdrawal point to dispense
with the need for a circulation line. If a circulation line is mandat-
ory, it must be installed according to the schematic diagrams in
Chap. 9.5.1.
3.6.1

Connecting hydraulic lines

DANGER: RISK OF BURNING
There is a danger of scalding at hot water temperatures
over 65 °C. This is possible when using solar energy if an
external heater is connected, the Legionella protection is
activated, or the target hot water temperature is set to be
greater than 65 °C or if the Smart-Grid function is activ-
ated.
▪ Install scalding protection (hot water mixer device (e.g.
VTA32)).
INFORMATION
The indoor unit is equipped with a pressure sensor. The
system pressure in monitored electronically and can be
displayed with the device switched on.
Nevertheless, we recommend installing a mechanical pres-
sure gauge between the indoor unit and the diaphragm ex-
pansion vessel, for example.
▪ Install the manometer so that it is easy to see when
filling.
Prerequisite: Optional accessories (e.g. solar, backup heater) are
mounted on the Daikin Altherma 3 H HT ECH
enclosed instructions.
1 Check cold water pressure (maximum 6 bar).
▪ If a higher pressure is present in the domestic water pipe, a
pressure reducer will need to be installed.
2 Make the hydraulic connections to the Daikin Altherma 3 H HT
ECH O.
2
▪ Refer to Fig. 3-1 up to Fig. 3-4
tion and dimensions of the heater connections and the outdoor
unit connections. The details of the hydraulic connection from
the indoor unit to the water inlet and outlet of the outdoor unit
can be seen in Fig. 3-29.
Fig. 3-29 Establishing the hydraulic connection to the outdoor unit
▪ Pay attention to the stipulated tightening torque (see
Chap. 9.2). To avoid damage, apply the necessary counter-
torque with a suitable tool, see
Set-up and installation
O as specified in the
2
and from Tab. 2-1 for the posi-
Fig. 3-30.
Installer reference guide
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