45
OK
C
A
B
OK
AAnn aaiirr bblleeeedd vvaallvvee
Install the highest points of tubes in a way that the air can
escape form the circuit.
W
Waatteerr ffiilltteerr ((ssuupppplliieedd aass ssttaannddaarrdd))
The filter is extremely important: it helps to lockout any impurities
in the water and avoid clogging the system and heat exchanger.
It must be installed immediately at the entrance to the water
mains, in a position that is easily accessible for cleaning.
The filter should never be re-moved.
Check for clogging from time to time
SSyysstteem
m ffiilltteerr ((pprroovviiddeedd bbyy tthhee cclliieenntt))
Must be installed on the system return
The filter must never be removed.
Check for clogging from time to time.
CCoonnnneeccttiinngg tthhee iinnddoooorr uunniitt ddrraaiinnss
NNoottee
Any anti-freeze liquid contained in the system should not be
discharged freely as it is a pollutant.
It must be collected and reused.
A.
domestic hot water safety valve (6 bar) (provided by the
customer)
B. system safety valve (3 bar)
C. basin drain pipe
Direct the exhaust pipe (C) towards a suitable drain.
Inside the unit there is a safety valve (3 bar on the installation
circuit) and one to be installed at the DHW outlet (6 bar on the
DHW circuit) that must be connected to a suitable drain,
otherwise if valves intervened and flood the rooms, the heat
pump manufacturer will not be responsible.
NNoottee
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.
W
Waatteerr ffeeaattuurreess
NNoottee
Circulators function well exclusively with clean and high-quality
tap water.
The most frequent factors that can affect circulators and the
system are oxygen, limescale, sludge, acidity level and other
substances (including chlorides and minerals).
In addition to the quality of water, installation also plays an
important role. The heating system must be airtight. Choose
materials that are not sensitive to oxygen diffusion (risk of
corrosion...).
CChhaarraacctteerriissttiiccss ooff tthhee wwaatteerr
•
compliant with local regulations
•
Langelier Index (LI) between 0 and +0.4
•
within the limits indicated in the chart
Water quality must be checked by qualified personnel.
HHaarrddnneessss
If the water is hard, install a system suitable to preserve the unit
from harmful deposits and limestone formation.
If necessary, install a water softener to reduce water hardness
CClleeaannlliinneessss
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 build-
ups.
NNeeww ssyysstteem
mss
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...) and preservatives
(including mineral oil). The system must then be filled with clean
high-quality tap water.
EExxiissttiinngg ssyysstteem
mss
If a new boiler or heat pump is installed on an existing heating
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. Various types of filters are
available. A mesh filter is designed to catch large dirt particles.
Water component for corrosion limit on
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
Ferrite hydroxide
Fe3O4 (black)
Dose < 7.5 mg/L 50%
of mass
with diameter < 10
Iron oxide Fe2O3
(red)
Dose < 7.5mg/L
Diameter < 1 µm
WateR connectionS
