Useful Advice; Central Heating; Frost Protection; Condensate Drain - Biasi M300V.2025 SM User Manual And Installation Instructions

3

USEFUL ADVICE

3.1

Central Heating

For your comfort and added system control,
you can install a room thermostat but you
should not shut off the radiator in that room
or have a TRV fitted on the radiator.
If a radiator (or a convector) does not heat
up, check that no air is present in it and that
its valve is open. If the ambient temperature
is too high, do not alter the radiator valves.
Reduce the central heating temperature in-
stead by means of the room thermostat or
by pressing the 15 and 16 heating adjust-
ment keys (Fig. 3.1).
12
13
Fig. 3.1
3.2

Frost protection

The built in anti frost system protects the
boiler from frost damage but does not pro-
vide any protection for the system, an op-
tional external frost protection thermostat
can be added and a dedicated connection
point is available on the electrical connec-
tion block.
The anti-freeze function is also activated
with the boiler in stand-by (Fig. 3.2).
Fig. 3.2
USEFUL ADVICE
17
16
15
14
Therefore, when the boiler is not lit and
used in cold weather, with consequent risk
of freezing do not switch off the boiler at the
fused spur isolation switch or close the gas
inlet cock.
If the boiler is deactivated, have a qualified
technician empty the boiler (heating and
domestic hot water circuit), the C.H. system
and the D.H.W. system.
3.3

Condensate drain

The condensate drain must not be modi-
fied or blocked. Blockage of the condensate
drain, caused by debris or freezing, can
cause automatic shutdown of the boiler. If
freezing is suspected and the pipe run is ac-
cessible an attempt may be made to free
the obstruction by pouring hot water over
the exposed pipe an cleaning any blockage
from the end of the pipe.
If this fails to remedy the problem the assis-
tance of a Gas Safe registered installer or
in IE a competent person should be sought.
3.4

Periodic maintenance

For efficient and continuous operation of
the boiler, it is advisable to arrange mainte-
nance and cleaning by an Authorised Ser-
vice Centre Engineer, at least once a year.
During the service, the most important
components of the boiler will be inspected
and cleaned. This service can be part of a
maintenance contract. In particular, you are
advised to have the following checks car-
ried out:
• domestic hot water heat exchanger;
• condensing heat exchanger;
• burner;
• exhaust fume duct and flue;
• pressurisation of the expansion tank;
• filling up of the central heating circuit;
• bleeding of air from the central heating
system;
• general check of the appliance's opera-
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