Ferroli OPERA Instructions D'utilisation, D'installation Et D'entretien page 140

The filling water (first filling and subsequent replenishments) must be potable, clear, with hardness under the values
indicated in the table below and treated and conditioned with chemical conditioners declared suitable by the maker (see
following list), in order to prevent encrustations, corrosive or aggressive phenomena on the metals and plastics of the
generator and system, the formation of gas, and the proliferation of bacterial or microbial masses in low temperature
systems.
The water contained in the system, as well as the replenishment water, must be checked periodically (at every start-up
of the system, after any non-scheduled intervention such as, for example, replacement of the generator or other system
components, as well as at least once a year during mandatory routine maintenance operations as required by UNI
8065). The water must have a clear appearance and respect the limits given in the following table.
WATER PARAMETER
Total filling water hardness (°f)
Total system water hardness (°f)
PH
Copper Cu (mg/l)
Iron Fe (mg/l)
Chlorides (mg/l)
Conductivity (µS/cm)
Sulfates
Nitrates
* In the presence of conditioners, the limit increases to 1200 µS/cm.
In case of differing values or difficult verification of values with conventional analysis/testing procedures, contact the
company for additional evaluations. The conditions of the feed water to be treated can vary even significantly depending
on the geographical areas where the systems are located.
Chemical conditioners deoxygenating, anti-scaling, corrosion inhibiting, anti-bacterial, anti-algae, frost protection, PH
correction products, etc., must also be suitable for the materials of the generator and system. They must be put in the
system respecting the quantity indicated by the supplier of the chemical product and verified in their concentration.
A chemical conditioner in insufficient concentration will not be able to ensure the
B
required protection.
Always check the product concentration each time it is added and cyclically, at
least once a year, using qualified technical personnel such as our authorized tech-
nical assistance network.
Table 3- Chemical conditioners declared suitable and available at our network of Authorized Tech-
nical Assistance Centers
LIFE PLUS/B - MOLY - MOLY K
LIFE DUE
BIO KILL
PROGLI
Products with equivalent characteristics may be used
140
Description
Molybdenum-based corrosion inhibitor
Noise reduction/anti-scaling maintenance
Biocidal anti-algae
Propylene frost protection
cod. 3541R960 - Rev. 00 - 09/2019
EXISTING SYSTEM
<10
<15
7 < Ph < 8.5
Cu < 0.5 mg/l
Fe < 0.5 mg/l
Cl < 50 mg/l
< 600 µS/cm*
< 100 mg/l
< 100 mg/l
Sentinel type alternative products
X100
X200
X700
X500
OPERA
NEW SYSTEM
<10
<10
EN