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6 - WATER CONNECTIONS
6.1 - WATER FEATURES
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
) index between 0 and +0.4
L
within the limits indicated by table
The water quality must be checked by qualified personnel.
Hardness
If the water hardness is high install a system suitable to
preserve the unit from harmful deposits and limestone
formations.
Cleaning
Before making the water connections to unit clean carefully
the system with specific and effective products for removing
residues or impurities that could affect the operation.
The existing systems must be free from sludgs, contaminants
and protected against foulings.
Exclusions
The warranty does not cover damages caused by limestone
formations, deposits and impurities from the water supply
and / or failure from failed system clearing to clean system.
If necessary, fit a water softener to reduce water hardness.
Concentration limit values for preventing galvanic
corrosion
PH
--
SO
4
-
--
HCO
/ SO
3
4
Total Hardness
Cl-
3-
PO
4
NH3
Free Chlorine
+
Fe
3
++
Mn
CO
2
H
S
2
Temperature
Oxygen content
6.2 - 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.
Do not use materials that cannot withstand high temperatures
Do not use flexible pipes for unit connection.
7,5 ÷ 9,0
< 100
ppm
> 1
8 ÷ 15
°f
< 50
ppm
< 2,0
ppm
< 0,5
ppm
< 0,5
ppm
< 0,5
ppm
< 0,05
ppm
< 50
ppm
< 50
ppb
< 65
°C
< 0,1
ppm
6.3 WATER FILTER
(Provided by the customer)
The filter is extremely important: it helps to lockout any impuri-
ties in the water and avoid clogging the system and heat ex-
changer.
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.
Installation
OK
6.4 - PRESSURE REDUCER
If the inlet water pressure is less than 0,2MPa (2bar), a pump
should be installed at the water inlet.
For guarantee the safety usage of storage tank at the
condition of water supply hydraulic higher than 0,65MPa
(6,5bar), a pressure reducer should be installed at the water
inlet pipe
A calibration pressure of 3-4 bar (0,3-0,4 MPa) is advisable.
Periodically check the pressure
6.5 - EXPANSION VESSEL (
Be provided with an expansion tank proportioned to the
boiler's dimensions (you are advise to let the circulation be
made by a thermo technician).
To compensate the pressure variations and/or the water
hammers in the cold water network and to avoid water losses,
it is recommended to install an expansion vessel
An expansion tank allows the correct system pressure to be
maintained when the water temperature varies.
6.6 - SAFTEY VALVE (
Provided by the customer
Install all safety devices required by the local laws in force in
the countries where the unit is installed.
The manufacturer of the heat pump shall not be held
responsible for any damage caused by failure to comply with
said laws.
Install the safety valve (7 Bar max) (0,7 MPa max) on the
outlet of the domestic hot water, which must be connected to
a suitable discharge. If this is not done and the valve trips and
the room is flooded, the manufacturer of the heat pump shall
not be held responsible.
The discharge pipe connected to the safety valve must be
installed and angled downwards to an adequate drain and
sheltered from freezing.
The pressure-relief device is to be operated regularly to
remove lime deposits and to verify that is not blocked.
See Maintenance section.
To the installation information refer to pag. 20-21
(Provided by the customer)
)
Provided by the customer
)
18
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