46
INSTALLERUSER
MAINTENANCE TECHNICIAN
3
INSTRUCTIONS FOR
MAINTENANCE AND
INITIAL CHECK
3.1 GENERAL WARNINGS.
ATTENTION:
operators who install and service the
appliance must wear the personal pro-
tective equipment (PPE) required by
applicable law.
ATTENTION:
before performing any maintenance
operation, make sure:
-
you have disconnected the power to
the appliance;
- you have closed the gas cock;
-
you have discharged the pressure from
the system and domestic hot water
circuit.
Risk of material damage aer using sprays and liq-
uids to search for leaks.
Leak sprays and liquids clog the reference hole PR (Part.
4 Fig. 39) of the gas valve, damaging it irreparably.
During installation and maintenance, do not use spray
or liquids in the upper area of the gas valve (side referring to the
electric connections)
Supply of spare parts.
e device’s warranty shall be rendered null and void
if unapproved or unsuitable parts are used for main-
tenance or repairs. ese will also compromise the
product’s compliance, and the said product may no
longer be valid and fail to meet the current regulations.
With regard to the above, only use Immergas original spare parts
when replacing parts.
If additional documentation needs to be consulted for
extraordinary maintenance, contact the Authorised
Aer-Sales Service.
3.2 INITIAL CHECK.
To commission the boiler:
-
ensure that the type of gas used corresponds to the
boiler settings;
-
check connection to a 230V-50Hz power mains, cor-
rect L-N polarity and the earthing connection;
-
make sure the central heating system is lled with water and
that the pressure gauge indicates a pressure of 1-1.2 bar.
-
switch the boiler on and check correct ignition;
-
check the ∆p gas values in DHW (when the boiler is connected
to an external storage tank unit) and in central heating mode.
-
check the CO
2
ow rate in the ue:
- maximum;
- minimum;
the values must comply with what is indicated in the relative
tables (Par. 3.3);
-
check activation of the safety device in the event of no gas, as
well as the relative activation time;
-
check the intervention of the main switch located upstream
of the boiler and in the boiler;
-
check that the intake and/or exhaust terminals are not
blocked;
-
ensure activation of all adjustment devices;
-
seal the gas ow rate regulation devices (if settings are mod-
ied);
-
check the production of DHW (when the boiler is connected
to an external storage tank unit);
-
check sealing eciency of water circuits;
-
check ventilation and/or aeration of the installation room
where provided.
If even only a single safety check oers a negative result, do
not commission the system.
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