Requirements For The Heating And Storage Water; Heating System And Sanitary Connection - Daikin Altherma EHS Serie Manual De Instrucciones E Instalación

2.4.5 Requirements for the heating and
storage water
Damage due to deposits and corrosion: observe
the current technological regulations to prevent
corrosion products and deposits.
Minimum requirements regarding the quality of
filling and top-up water:
Water hardness (calcium and magnesium,
calculated as calcium carbonate):
Conductivity: 1500 (ideal
Chloride: 250 mg/l
Sulphate: 250 mg/l
pH value: 6,5 - 8,5
Measures for desalination, softening or
hardness stabilisation are necessary if the filling
and top-up water have a high total hardness
(>3 mmol/l – total of the calcium and magnesium
concentrations, calculated as calcium car-
bonate). We recommend the use of Fernox KSK
limescale and corrosion protector. For other
properties deviating from the minimum require-
ments, suitable conditioning measures are nec-
essary to maintain the required water quality.
Using filling water and top-up water which does
not meet the stated quality requirements can
cause a considerably reduced service life of the
equipment. The responsibility for this lies solely
with the operator.
If an optional external heat generator is
connected, these minimum requirements
also apply to the filling and supple-
mentary water for this heating circuit.
Daikin Altherma EHS(X/H)
Daikin Altherma integrated solar unit
008.1441399_02 – 01/2021 – EN
2.4.6 Heating system and sanitary
3 mmol/l
100) S/cm
During operation of the indoor unit with an
auxiliary heat source, the storage tank temper-
ature may exceed 65 °C, above all when solar
energy is used.
If the indoor unit is connected to a heating
system with steel pipes, radiators or non-
diffusion-proof floor heating pipes, sludge and
chips can enter the hot water storage tank and
cause blockages, local overheating or corrosion
damage.
connection
Create a heating system according to the
safety requirements of EN 12828.
The plumbing connection must comply with
the requirements of EN 12897. The require-
ments of the following must also be observed:
– EN 1717 – Protection against pollution of
potable water installations and general
requirements of devices to prevent pollu-
tion by backflow
– EN 61770 – Electric appliances connected
to the water mains – Avoidance of back-
siphonage and failure of hose-sets
– EN 806 – Specifications for installations
inside buildings conveying water for human
consumption
– and, in addition, the country-specific legis-
lation.
For this reason, some form of scalding
protection needs to be included when you
install the system (hot water mixing device,
e.g. VTA32).
The domestic water quality must comply
with the EU Guideline 98/83 EC and the
regionally-applicable regulations.
To prevent possible damage, install a dirt filter
or sludge separator into the heating return
flow of the system (SAS 1 or SAS 2).
The dirt filter must be cleaned at regular
intervals.
2 x Safety
Installation and operating instructions
7