Immergas VICTRIX PRO V2 EU - Page 22

VICTRIX PRO V2 EU
22
7 FEED WATER TREATMENT
Treating the feed water allows you to prevent problems
and maintain the function and eciency of the generator
over time.
Immergas S.p.A. reminds you that all types of systems require
all building categories to treat the system's water, whether
they are "new buildings and renovated existing buildings" or
"new installation and renovation of heating systems or boiler
replacement".
Water treatment means rst thoroughly cleaning the thermal
system (washing) and then appropriately treating the water
lling the system, in particular:
- by more than 25 French degrees, if the system does not
produce domestic hot water,
- by more than 15 French degrees, if the system produces do-
mestic hot water, through chemical conditioning treatment
for outputs of < 100 kW – or soening for outputs between
100 and 350 kW.
e Italian standard UNI 8065:
- Assumes that, prior to treatment, the water intended to sup-
ply heating systems for civil use has the same characteristics
as drinking water.
- Requires the design phase to include treatment or chemical
conditioning systems to provide the water in the circuit with
the following characteristics:
- appearance clear;
- pH greater than 7 (but less than 8 for
systems with aluminium radiators);
- iron content: less than 0,5 mg/kg;
- copper content: less than 0,1 mg/kg.
As for hot water central heating systems, according to the
standard:
- for all systems, it is necessary to provide chemical condition-
ing. For systems of > 350 kW it is necessary to install a safety
lter (recommended in any case) and, if the water has a total
hardness of more than 15 French degrees, a water soener
to bring the hardness back within the range;
- the lling and topping-up water must be clear and have a
total hardness of 15 French degrees.
N.B.: to maintain optimal characteristics of the water in the
central heating systems over time, we recommend using and
placing specic liquid inhibitors in the circuit.
As for domestic hot water production systems, the standard
requires:
- a safety lter to be installed, to protect the systems;
- based on the characteristics of the water, a water soener
and/or proportional automatic chemical conditioning dos-
ing system to be installed (food-grade anticorrosive and/or
hardness stabilising agents). Treatment systems and points
where conditioning agents are added must all be upstream
of the hot water generator;
- the following characteristics (appearance - hardness) of the
system feed water:
a) up to 25 French degrees, in terms of temporary hardness,
it is possible to use either soening or hardness and/or an-
ticorrosive chemical stabilisation conditioning;
b) soening is compulsory when temporary hardness ex-
ceeds 25 French degrees;
c) whenever necessary, soening will be integrated with
anticorrosive and/or descaling chemical conditioning.
KEY:
1 - Ball valve
2 - Sample trap
3 - Filling unit
4 - Disconnector
5 - Water treatment unit
6 - Litre meter (recom-
mended)
7 - “Y” lter
Example of water treatment unit
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