Installation, user and maintenance manual
– GAHP-A
31
for thermo-hydraulic installations in civil or industrial applications. Parameters indicated
in Table 5.1 Chemical and physical parameters of water
→
31 must be complied with.
table 5�1 – Chemical and physical parameters of water
CHeMICAL And PHYsICAL PARAMeteRs of WAteR In HeAtInG/CooLInG sYsteMs
PARAMeteR
UnIt of MeAsUReMent
ALLoWABLe RAnGe
pH
\
>7
(1)
Chlorides
mg/l
< 125
(2)
Total hardness (CaCO
3)
°f
< 15
°d
< 8,4
Iron
mg/kg
< 0,5
(3)
Copper
mg/kg
< 0,1
(3)
Aluminium
mg/l
< 1
Langelier’s index
\
0-0,4
HARMfUL sUBstAnCes
Free chlorine
mg/l
< 0,2
(3)
Fluorides
mg/l
< 1
Sulphides
ABSENT
1 with aluminium or light alloys radiators, pH must also be lower than 8 (in compliance with applicable rules)
2 value referred to the maximum water temperature of 80 °C
3 in compliance with applicable rules
Water quality can be measured through parameters like acidity, hardness, conductivity,
chlorides content, chlorine content, iron content and the like.
The presence of free chlorine in the water, in particular, can jeopardize parts of the instal-
lation and Robur units. Therefore, please make sure that free chlorine content and total
hardness are compliant with the allowable ranges reported in Table 5.1 Chemical and
physical parameters of water
→
31.
The way the installation is operated can be the cause of possible degradation of water
quality.
Moreover, abnormally massive water top-up or reintegration can cause a drift of chemical
or physical above-mentioned parameters. Reintegration should not exceed 5% per year
of the total amount of water. It is advised to check regularly the water quality, especially
in case of automatic or periodic top-up.
In case water treatment is needed, this operation should be carried out by a professional
or competent person, following strictly the instructions by the manufacturer or supplier
of the chemical substances for the treatment, since dangers could arise for health, for the
environment and for Robur appliances.
Several products for water treatment are available on the market.
Robur does not perform detailed market surveys. Therefore Robur suggests to contact
Companies which are specialized in water treatments. They will be able to suggest the
best way how to proceed according to the type of installation.
In case washing of the pipes is needed, this operation should be carried out by a profes-
sional or competent person, following strictly the instructions by the manufacturer or
supplier of the chemical substances for the washing, avoiding the use of substances ag-
gressive for stainless steel or containing/releasing free chlorine.
Please make sure the pipes are properly rinsed in order to remove any residue of chemi-
cal substances from the pipes.
Robur is not liable for ensuring that water quality is always compliant with what reported
in Table 5.1 Chemical and physical parameters of water
→
31. Non-compliance with in-
dications above may jeopardize the proper operation, integrity and reliability of Robur
appliances, invalidating the warranty.
For any further detail, please contact directly Robur S.p.A. (tel.+39 035.888.111).
The components below are always to be fitted in proximity to the appliance:
