8
The treatment of the supply water
allows to prevent inconveniences
and maintain the functionality and
To minimise corrosion, it is crucial to
use a corrosion inhibitor; in order for
-
es must be clean.
(see system protection ACCESSO-
RIES sect. in domestic price list)
ATTENTION (*) see general warnings
The heating only models are NOT
suitable for the production of water
for human consumption according
ATTENTION!
FOULING OR BY CORROSIVE WA-
WARRANTY.
1.8 - BOILER ANTIFREEZE
PROTECTION
To activate the antifreeze function, position
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.
The heating system can be protected
effectively from frost by using antifreeze
products with inhibitor for heating
systems.
Do not use car engine antifreeze
products as they could damage the
water gaskets.
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
P
O
S
ANTIFREEZE FUNCTION
Power supplies Hb (*) Status
function
antifreeze
Actions
Electric Gas
1
ON ON < 6 °C ON - Burner and Pump ON until T > 14°C
ON OFF
< 2 °C ON
Only when both the power supplies are ON:
- Burner and Pump OFF until T > 5°C
- When T > 5°C then Burner and Pump
ON until T > 14°C.
OFF ON
OFF OFF
(*) Sensor 11 par. 2.2
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