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Fig.
4-18 Supporting rear-facing hydraulic lines
4
x
Set-up and installation
Daikin Altherma M ECH
2
O
Solar storage tank with heating controller
008.1446799_00 – 07/2019 – EN
Installation and maintenance instructions
21
– Connect the water for filling or refilling the heating system
as per EN
1717 so that contamination of the drinking
water due to return flow is reliably prevented.
●
Connect the drain line to the safety overpressure valve and
diaphragm expansion vessel as per EN
12828.
– Check the seat of the drain hose on the pressure relief
valve.
– If necessary, connect and install a separate hose.
●
Carefully insulate pipework against heat loss and to avoid
condensation (insulation thickness at least 20
mm).
–
Water shortage protection:
the controller's pressure and
temperature monitoring function shuts off the Daikin Altherma
M ECH
2
O reliably if there is a shortage of water. No additional
water shortage protection is needed in the construction.
–
Damage due to deposits and corrosion:
observe the rele-
vant technical rules to avoid corrosion products and deposits.
Minimum requirements regarding the quality of filling and sup-
plementary water:
– Water hardness (calcium and magnesium, calculated as
calcium carbonate):
≤
3 mmol/l
– Conductivity:
≤
1500 (ideal:
≤
100)
μ
S/cm
– Chloride:
≤
250
mg/l
– Sulphate:
≤
250
mg/l
– pH-values (heating water): 6.5 - 8.5
Measures for desalination, softening, hardness stabilisation or
other suitable conditioning measures are necessary to adhere to
the required water quality if the filling and top-up water have a
high overall hardness or other properties that deviate from the
minimum requirements.
WARNING!
There is a danger of scalding at hot water tem-
peratures over 60
°C. This is possible when
using solar energy if an external heater is con-
nected, the Legionella protection is activated, or
the target hot water temperature is set to be
greater than 60
°C.
●
Install scalding protection (hot water mixing
facility (e.g. VTA32 + Screw set
1").
●
Connect the drain hose to the hose connector for the safety
overflow (fig.
23).
– Use transparent drain hose (draining water must be visi-
ble).
– Connect the drain hose to an adequately dimensioned
waste water installation.
– Drain should not be lockable.
Fig.
4-19 Installation of drain hose at safety overflow
●
Connect the discharge fitting on the cover (fig.
30)
to the waste water installation with the enclosed hose section.
●
Connecting a diaphragm expansion vessel (see fig.
– Connect a suitably dimensioned and preset diaphragm
expansion vessel for the heating system. There must not
be any hydraulic blocking elements between the heat
generator and the safety valve.
– Position the diaphragm expansion vessel in an easily
accessible place (maintenance, parts replacement)
Fig.
4-20 Mounting the diaphragm expansion vessel