for the technician
While connecting gas inlet pipe of the boiler to the pipe coming from gas network, it
is MANDATORY to insert a TIGHT GASKET, whose dimensions and material must be
adequate. Connection is NOT suitable for hemp, teflon strip or similar materials.
Using LPG, it is absolutely necessary to install a pressure reducer upstream the boiler.
Due to various installation possibilities, the gas cock supplied with Standard Connections Kit for
SUPERMICRA boilers has a simple male Ø ½” connection, facing the rear of the boiler. No gas
pipes are supplied.
Electrical connections
The link of the room thermostat works with a safety extra low voltage (SELV); connect it to
the voltage free terminals of the room thermostat/cronothermostat. On NO account must
any electrical voltage be applied to these terminals.
The boiler must be connected to an electrical line of 230V-50Hz, respecting the polarities L-N (Live-
Neutral) and the earth connection.
PLACE UPSTREAM THE BOILER A BIPOLAR SWITCH in accordance with the rules
actually in force.
For the general electrical supply of the appliance, the use of adaptors, multiple taps and exten-
sions is not allowed.
If the supply cable must be replaced, use one of the following wire types: H05VVF or H05-VVH2-F.
It is mandatory the earth connection in accordance with the rules actually in force. To re-
place the cable, release the cable fastener placed on the frame of the hydraulic connections, open
the back cover of the control panel and disconnect it from the terminals. Install the new cable
working in the reverse way. When connecting the cable to the boiler, it’s IMPORTANT:
— to leave the Earth wire about 2 cm longer than Live and Neutral wires;
— to lock tha cable in the cable fastener placed on the frame of the hydraulic connections.
Electrical safety of the appliance is only achieved when it is well connected to an
efficient earthing system, executed as indicated by the safety rules actually in force.
A qualified technician must check that the electrical system is in line with the maximum power
allowed by the boiler, indicated on the data plate, with particular attention to the cables section.
Remark: HERMANN Ltd. declines any responsibility for damages to persons, animals or
things caused by the non-connection of the boiler earthing and by failure to comply with
the rules.
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