8
1.7 - W ATER TREATMENT
The treatment of the supply w ater
allow s to prevent inconveniences
and maintain the functionality and
efcienc of the generator over time.
The ideal w ater pH in heating systems
must be within:
To minimise corrosion, it is crucial to
use a corrosion inhib itor; in order for
it to wor properl, the metal surfac-
es must b e clean.
( see system protection ACCESSO-
RIES sect. in domestic price list)
ATTENTION ( * ) see general w arnings
1.1:
The heating only models are NOT
suitab le for the production of w ater
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 W A-
TER W ILL NOT BE COVERED BY THE
W ARRANTY .
1.8 - BOILER ANTIFREEZE
PROTECTION
To activate the antifreeze function, position
the two nobs as shown in the gure.
MAX
M
I
N
MAX
MIN
This protection can intervene only if
the electricity and gas supplies are
connected.
If one of the two is not av ailab le and upon
reset 11 ( SR) a temperature of < 2 °C is
detected, the appliance will b ehav e as
describ ed in tab . pos 2.
The heating syst em can b e protected
effectiv ely from frost b y using antifreez e
products with inhib itor for heating
syst ems.
Do not use car engine antifreez e
products as they could damage the
water gaske ts.
VALUE MIN MAX
P H 6.5 8
Hardness [ °fr] 9 15
NOTE!
Further details in the section
‘‘Technical Information’’ on the b oiler
page of the w w w .unicalag.it w eb site
P
O
S
ANTIFREEZE FUNCTION
P ower supplies 11 - SR ( * ) Status
function
antifreeze
Actions
Electric Gas
1
ON ON < 6 °C ON - B urner and P ump ON until T > 14°C
2
ON OFF
< 2 °C ON
Only when b oth the power supplies are ON:
- B urner and P ump OFF until T > 5°C
- W hen T > 5°C then B urner and P ump
ON until T > 14°C.
OFF ON
OFF OFF
( * ) Sensor 11 par. 2.2
ATTENTION ( * ) see general w arnings
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ATTENTION ( * ) see general w arnings
heating only models are NOT
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heating only models are NOT
heating only models are NOT
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heating only models are NOT
suitab le for the production of w ater
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suitab le for the production of w ater
for human consumption according
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for human consumption according
to Ministerial Decree D.M. 174/2004.
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to Ministerial Decree D.M. 174/2004.
FORMATION
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FORMATION
W A W
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W A W
To activate the antifreeze function, position
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To activate the antifreeze function, position
the two nobs as shown in the gure.
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the two nobs as shown in the gure.
This protection can intervene only if
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This protection can intervene only if This protection can intervene only if
the electricity and gas supplies are
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the electricity and gas supplies are the electricity and gas supplies are
connected.
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connected.connected.
If one of the two is not av ailab le and upon
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If one of the two is not av ailab le and upon If one of the two is not av ailab le and upon
reset
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reset reset
detected, the appliance will b ehav e as
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detected, the appliance will b ehav e as
describ ed in tab .
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describ ed in tab .
NOTE!
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NOTE!
Further details in the section
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Further details in the section
‘‘Technical Information’’ on the b oiler
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‘‘Technical Information’’ on the b oiler
page of the w w w .unicalag.it w eb site
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page of the w w w .unicalag.it w eb site
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P ower supplies
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P ower supplies
Electric Gas
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Electric Gas
Electric Gas
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Electric Gas
ON ON < 6 °C ON - B urner and P ump ON until T > 14°C
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ON ON < 6 °C ON - B urner and P ump ON until T > 14°C
ON ON < 6 °C ON - B urner and P ump ON until T > 14°C
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ON ON < 6 °C ON - B urner and P ump ON until T > 14°C
ON OFF
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ON OFF
ON OFF
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ON OFF
OFF ON
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OFF ON
OFF ON
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OFF ON
OFF OFF
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OFF OFF
OFF OFF
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OFF OFF
( * ) Sensor 11 par. 2.2
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( * ) Sensor 11 par. 2.2
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