38
User instructions
for the user
U
SER
INSTRUCTIONS
Warnings for first starting up
The first starting up must be done by a professionally qualified staff (for example the
SERVICE CENTERS authorized by HERMANN).
Gas conversion from a specific gas (natural gas or LPG) to another gas, can be made also when
the gas boiler is already installed, but only by a qualified technician. The technician will check that:
a) the label technical data of the gas boiler correspond to those of the gas, water and electrical
supply lines;
b) the main burner regulation is compatible with the gas boiler output;
c) the chimney works correctly, expelling the combustion products;
d) the air supply and the combustion products evacuation work correctly, in accordance with the
requirements in force;
e) the conditions for a correct ventilation are guaranteed, also when the gas boiler is located
inside a furniture.
Useful advices
WARNING for “E” models: The boiler is fitted with a safety thermostat for chimney
draught, operating in case of combustion products return in the installation room.
This device must be always in function, because a combustion products return can
cause chronic or acute intoxications with danger of death. If the thermostat must be
replaced, use the original spare part only. In case of repeated interventions of the
device, check that the Flue Products Outlet System is efficient and made according
to the laws in force (see examples in page 15).
WARNING for “SE” models: The boiler is fitted with a safety flue pressure switch. This
device must be always in function. In case of repeated interventions, call a qualified
technician. If the pressure switch must be replaced, use the original spare part only. In
case of repeated interventions of the device, check that the Air Flue Products Inlet/
Outlet System is efficient and made according to the laws in force (see examples in
page 16).
INSTALLATION AND SERVICING
All installation, servicing and gas conversion operations MUST BE CARRIED OUT BY QUALIFIED
TECHNICIANS
authorized by Law n. 46 dtd March 5
th
, 1990 and in accordance with UNI-CIG 7129/
01 and 7131/99 requirements and revisions
.
Moreover, in accordance with art.11 section 4 of DPR 412/93 and revisions, boiler MAINTENANCE
operations must be made at least once a year and following manufacturer’s specifications and UNI
and CEI rules in force.
