Fondital NIAS BTN 28, Installation, Use And Maintenance Manual

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the pump will not block because
the boiler’s electronic system
has an automatic anti-block
function: the pump is operated
for a few seconds every day.
The boiler electronic has a
boiler anti-freeze function which
can be chosen by means of
selector A.
This function starts
automatically as below
described:
- heating system:
should the temperature of the
heating system water drop
below 7 °C the pump is
automatically switched on; if the
temperature drops below 5 °C
the burner lights up for a
maximum time of 15 minutes or
until the temperature of the
water in the system reaches 15
°C.
- DHW system:
when the probe inside the water
storage tank detects a
temperature lower than 6 °C
the burner switches on for a
maximum time of 15 minutes or
until the temperature of the
water in the system reaches 15
°C.
WARNING
This function is not active if
the boiler is disconnected
from the power and gas
supply and the gas tap is
closed.
The heating system can also be
effectively protected against
freezing by using specific anti-
freeze products suitable for
multi-metal systems. Do not
use car engine anti-freeze
products and check the
effectiveness of the product
over time.
The boiler has a temperature
and pressure gauge which
allows you to check the
temperature and pressure of
the water in the heating system.
When the boiler is switched off
the pressure of the water must
be 0.8/1 bar.
If this value drops then use the
pressure control tap to adjust to
the correct value.
WARNING
After adjusting the pressure,
close the tap without over-
tightening it. If the tap is not
closed properly the pressure
could rise, resulting in the
safety valve intervention and
water outflow.