Bartscher 900-Serie Bedienungsanleitung Seite 41

Gas Connection
Before connecting the appliance, it is necessary to check that the type of gas available corresponds
to the type of gas the appliance has been set for. In the event that they do not correspond, it is
necessary to proceed as described in the paragraph "Functioning with gas different from the
setting". The connection to the threaded coupling, having a diameter of ¾ inch, situated on the
bottom of the appliance, may be fixed or mobile using a compliant rapid pipe fitting. If flexible
piping is used, this must be in stainless steel and compliant with the norm. All the seals on the
junction threads must be in guaranteed materials certified for use with gas. Before the installation of
each single appliance it is necessary to install a cut off cock for rapid interruption of the gas supply,
placed in an easily accessible position in such a way as to make it possible to turn off the gas supply
when the appliance is not being used. When the connection has been completed, the tightness must
be checked by using a leak-finder spray.
Electric connection
Before connecting the appliance, it is necessary to check that the voltage of the power supply
available corresponds to the voltage the appliance has been set for. In the event that they do not
correspond, it is necessary to modify the connection as shown in the electric diagram, if voltage
change is provided for. The terminal blocks are situated behind the instrument board and they can
be removed unscrewing the 2 screws that fix the support and pulling out the same and the terminal
blocks. Furthermore, the efficiency of the earth connection must be checked, and also that the earth
conductor on the connecting side is longer than the other conductors, and that the connecting cable
has a wire bunch adequate for the power absorbed by the appliance and is at least type H05 RN-F.
As in international provisions, before installing the appliance a unipolar device must be
installed with a contacts opening of at least 3mm which must not interrupt the YELLOW-
GREEN earth wire. The device must be installed near the appliance, it must be approved and have
adequate capacity for the absorption of the appliance (see technical features).
The appliance must be connected to the EQUIPOTENZIALE system. The connector is situated near
the end of the electric cable and is identified by a label with the symbol shown on figure 9 (pag. 5).
When using a safety switch for fault currents, the following should be observed:
- According to current legislation, these kind of appliances can have a leakage current of 1mA
per kW of rated power input with no maximum. It should also be noted that all fault current
protection switches available on the market have a current tolerance of less than 50%;
therefore, a suitable switch should be chosen.
- Connect only one single appliance to each switch.
In some cases, after long periods of inactivity or with a new installation, it is possible that the
appliance trips the safety switch when it is turned on. The reason for this is usually moisture in the
insulation. The problem can be solved by a short pre-heating that bypasses the safety thermostat.
Checking gas tightness and pressure (fig.10 – pag.5)
Before proceeding to check the pressure, it is necessary to check the tightness of the gas installation
up to the nozzle with a leak-finder spray to ensure that no damage has been done to the appliance
during transportation. Then it is possible to proceed with checking the inlet pressure, which is done
by means of a gauge for liquids , either a "U" gauge or an electronic gauge with a minimum
definition of 0,1 mbar. To carry out the reading, the screw (1) must be removed from the pressure
outlet (2) and the rubber pipe of the gauge connected. Open the gas supply valve of the appliance,
check the pressure output and close the valve. Remove the pipe of the gauge and put back the
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