30
4 Boiler test
Boiler test (or new boiler
first operation) must be
performed exclusively by
qualified personnel.
4.1 Preliminary checks
Before carrying out any test
(or starting the boiler for the
first time), perform the
following checks:
- the installation must comply
with applicable laws;
- the flue gas outlet duct and
the end section are installed in
compliance with instructions:
when the boiler is switched
on there must be no leakage
of combustion products
from any of the seals;
- power supply is 230 V - 50
Hz;
- system is loaded (water
pressure gauge reads 0.8/1
bar);
- cut-off valves on the system
pipes are open;
- gas mains supply according
to boiler factory-set gas: in
case of discrepancy, convert
the boiler to the gas type
available, see “SWITCHING
TO DIFFERENT GASES“
section in this manual;
- gas mains tap is open;
- no gas leaks are detected;
- boiler is electrically powered;
- boiler safety valve is not
locked;
- no water leaks are detected.
Should boiler not be
installed complying with
applicable standards and
laws, do not start it and
notify immediately the
central heating system
supervisor.
4.2 Turning the boiler on or
off
Follow the “Users’
Instructions” for boiler on
and off procedure.
5 Maintenance
B
oiler must be yearly serviced
to ensure efficient and trouble-
free operation.
Maintenance (or repair)
operations must be
performed exclusively by
qualified personnel.
Disconnect the boiler from
power mains before
beginning any maintenance
procedure either involving
replacement of components
and/or internal cleaning.
Maintenance list
Routine maintenance must
include the following checks:
- boiler integrity ;
- leakage of the boiler’s gas
circuit and gas mains network;
- boiler gas supply pressure;
- minimum and maximum gas
pressures to the boiler
nozzles;
- boiler ignition;
- boiler combustion
parameters through flue gas
analysis (to be performed on a
two-year basis if boiler is
individually installed. Annually
to cascade-installed boilers);
- general condition and leak
check of flue system including
anti-wind gust device (BTN -
balanced flue - model);
- absence of flue gas reflux
into the premises and correct
exhaust of flue gas (BTN –
balanced flue - model);
- condition of safety
thermostat installed on the
anti-wind gust device (BTN –
balanced flue - model);
- air pressure switch (BTFS –
forced draught - model);
- general condition of e boiler
safety devices;
- water leaks and scaling of
boiler connections;
- efficiency of the CH safety
valve;
- efficiency of the DHW safety
valve;
- expansion vessel working
pressure;
- water pressure switch
efficiency;
- magnesium anode efficiency.
And the following cleaning
operations:
- general internal cleaning;
- gas nozzles;
- air intake and flue gas outlet
circuit (BTFS – forced draught
- model);
- anti-wind gust device (BTN –
balanced flue - model);
- room ventilation grille if
available (BTN – balanced flue
- model);
- heat exchanger (flue gas
side).
In case of new boiler first
operation, also check:
- boiler room characteristics
according to boiler
requirements;
- room ventilation grilles, if
available (BTN – balanced flue
- model);
- flue system dimensions,
diameters and lengths of
ducts;
- correct installation of the
boiler in compliance with the
instructions in this manual.
Should the boiler not be
installed according to this
manual operating require-
ments, if there is no
immediate danger or hazard
to people, animals and
property, notify, both
verbally and in writing, the
system supervisor.
Содержание NIAS BTN 28
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