CLIVET WSAN-YSi R32, Manual, Page: 13 / 74

Hydraulic system
The pipes must be designed and manufactured to limit pressure
drops as much as possible, i.e. optimise performance of the
system. Keep the following to a minimum:

overall length
 number of bends

changes of direction
Water quality
The water quality can be checked by qualified personnel.
Water with inadequate characteristics can cause:

pressure drop increase

energy efficiency decrease
 corrosive symptom increase
Water features:
 within the limits indicated by table
Provide a water treatment system if values fall outside the limits.
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 build-ups.
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.
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.
5 - WATER CONNECTIONS
Water component for corrosion limit on
Copper
PH (25°C) 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
H
2
S
< 50 ppb
Oxygen content < 0,1 ppm
Sand 10 mg/L
Ferrite hydroxide Fe3O4
(black)
Dose < 7.5 mg/L
50% of mass
diameter < 10 µm
Iron oxide Fe2O3 (red)
Dose < 7.5mg/L
Diameter < 1 µm
Electrical conductivity
(µS/cm)
<500
Sodium nitrate (mgNaNo
3
/l) <100
Alkalinity(mgCaCo
3
/l) <100
Copper (mgCu/l) <1.0
Sulphide ion (S - /l) None
Ammonium ion (mgNH
4
+
/L) <1.0
Silica (mgSiO
2
/l) 50
Max Ethylene, Propylene
glycol
50%
Nitrates <100
Free&aggressive Carbonic
Acid
<5