8
ATTENTION (*) see general warnings 1.1
The heating only models are NOT suitable for
the production of water for human consumption
according to Ministerial Decree D.M. 174/2004.
ATTENTION!
ANY DAMAGE TO THE BOILER CAUSED BY
THE FORMATION OF FOULING OR BY COR-
ROSIVE WATER WILL NOT BE COVERED BY
THE WARRANTY.
1.7 - WATER TREATMENT
The treatment of the supply water
allows to prevent inconveniences
and maintain the functionality and
efficiency of the generator over time.
The ideal water pH in heating systems
must be within:
To minimise corrosion, it is crucial to
use a corrosion inhibitor; in order for
it to work properly, the metal surfac
-
es must be clean.
(see system protection ACCESSO-
RIES sect. in domestic price list)
VALUE
MIN
MAX
PH
6.5
8
Hardness [°fr] 9
15
NOTE!
Further details in the section
‘‘Technical Information’’ on the boiler
page of the www.unicalag.it website
For outdoor installations, in partially protected places, it is necessary to use the additional
resistance kit (optional) for the anti-freeze protection of the DHW and siphon fittings.
Declared room temperature, with use of the resistance kit = -15 ° C.
