Water feature
Note
Fill the storage tank (DHW) only during the unit start-up.
If the house is not immediately lived,or the unit is turned
off
for
long periods, empty the storage tank to avoid the
stagnation of the water, or with temperatures close to 0°C the
risk of freeze.
See the Maintenance section for drain.
Water features
confirming to local regulations
Langelier (I
L
) index between 0 and +0.4
within the limits indicated by table
The water quality must be checked by qualified personnel.
Hardness
If necessary, fit a water softener to reduce water hardness.
Cleanliness
Before connecting the water to the unit, clean the system
thoroughly with specific products effective to remove residues or
impurities that may affect functioning.
Existing systems must be free from sludge and contaminants and
protected against buildups.
New systems
In case of new installations, it is essential to wash the entire
installation (with the circulator uninstalled) before commissioning
the central installation.
This removes residues of the installation process (welding, waste,
joint products...).
The system must then be filled with clean high-quality tap water.
Existing systems
If a new unit is installed on an existing system, the system must
be rinsed to avoid the presence of particles, sludge and waste.
The system must be drained before installing the new unit.
Dirt can be removed only with a suitable water flow.
Each section must then be washed separately.
Particular attention must also be paid to “blind spots” where a
lot of dirt can accumulate due to the reduced water flow.
The system must then be filled with clean high-quality tap water.
If, after rinsing, the quality of the water is still unsuitable, a few
measures must be taken to avoid problems.
An option to remove pollutants is to install a filter.
Water component for corrosion
limit on Copper
PH
7,5 ÷ 9,0
SO
4
--
< 100
HCO
3
-
/ SO
4
--
> 1
Total Hardness
8 ÷ 15
°f
Cl-
< 50
ppm
PO
4
3-
< 2,0
ppm
NH
3
< 0,5
ppm
Free Chlorine
< 0,5
ppm
Fe
3
+
< 0,5
ppm
Mn
++
< 0,05
ppm
CO
2
< 50
ppm
H
2
S
< 50
ppb
Temperature
< 65
°C
Oxygen content
< 0,1
ppm
Sand
10 mg/L
0.1 to 0.7mm max
diameter
Ferrite hydroxide
Fe3O4 (black)
Dose < 7.5 mg/L 50%
of mass
with diameter < 10
µm
Iron oxide Fe2O3
(red)
Dose < 7.5mg/L
Diameter < 1 µm
The warranty does not cover
damages caused by limestone
formations, deposits and impurities
from the water supply and/or from
failure to clean the systems.
6
WATER CONNECTIONS
Pipes connections
Connect the water outlet/inlet using pipes and couplings that are
resistant to both the operating pressure and the hot water
temperature, which can reach 70°C.
Note
Do not use materials that cannot withstand high temperatures
Do not use flexible pipes for unit connection.