for the technician
System filling
Once all system connections have been carried out,
proceed with system filling. This operation should be
made with caution, respecting the following steps:
— Open the radiators venting devices;
— Gradually open the water supply valve (see figure
“Boiler bottom view”), checking the correct func-
tioning of automatic venting devices, eventually
installed;
— Close the radiators venting devices as soon as
water flows;
— Make sure that pressure gauge reaches the opti-
mal value of 1÷1.5 bar (minimum: 0.5 bar);
— Close the water supply valve and bleed each ra-
diator;
In case the boiler is installed in rooms where temperature can drop down to 0°C, it is advis-
able to fill up the system with an anti-frost liquid.
Gas connection
Boiler installation must be carried out from a qualified technician, [as indicated by the Law XXXXX]
because an incorrect installation can cause damages to people, animals or things, for which the
manufacturer cannot be held responsible.
Verify what follows:
a) cleaning of all system gas pipes in order to avoid the presence of residual combustion products
that could compromise the correct boiler functioning;
b) gas line and ramp conformity with laws and rules actually in force (Laws UNI-CIG 7129/01 and
7131/99 – DM 12/04/96);
c) internal and external tightness of the gas system and connections;
d) supply pipe must have a section greater than or equal to the boiler one;
e) supply gas must correspond to the one for which the boiler has been regulated; otherwise, call
[an HERMANN Servicing Centre] [a qualified technician] for gas conversion;
f) an interception valve must be installed upstream the appliance;
Open the meter valve and purge the air that is inside the system pipes (including all the appli-
ances).
BOILER BOTTOM VIEW
FILLING
VALVE
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