8
1.8 -
BOILER ANTIFREEZE PROTECTION (*)
(*) The frost protection is always active.
Even disabling the CH and DHW services
P
O
S
ANTIFREEZE FUNCTION
Power supplies
11 - SR
(*)
Status
function
antifreeze
Actions
Electric
Gas
1
ON
ON
< 6 °C
ON
- Burner and Pump ON until T > 14°C
ON
ON
< 2 °C
ON
- Burner and Pump OFF until T > 5°C
- When T > 5°C then Burner and Pump
ON until T > 14°C.
2
ON
OFF
< 7 °C
OFF
-
Pump ON until T > 10°C
OFF
ON
OFF
-
Burner and Pump
OFF
OFF
OFF
OFF
-
Burner and Pump
OFF
(*) Sensor 11 par. 2.2
ATTENTION (*) see general warn-
ings 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 CORROSIVE wA-
TER 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
This protection can intervene only if
the electricity and gas supplies are
connected.
If one of the two is not available and
upon reset
11 (SR)
a temperature of < 2
°C is detected, the appliance will behave
as described in tab.
pos 2.
The heating system can be protected
effectively from frost by using antifreeze
products with inhibitor for heating
systems (specific for multidmetal).
Do not use car engine antifreeze
products as they could damage the
water gaskets.
