Lofra HBS640, Instructions For The Installation And Use, Page: 9 / 16

9
INSTRUCTIONS FOR THE INSTALLER
Electric connection
The connection to the electric grid must be carried
out by qualified personnel and in conformity with
the regulations in force.
The voltage of the electric system must correspond
to the value indicated in the label under the
appliance. Make sure that the electric system is
provided with an effective ground connection in
compliance with the regulations and provisions of
the law. Grounding is compulsory.
GAS TRANSFORMATIONS AND
ADJUSTMENTS
Replacing the nozzles
If the equipment is adjusted for a type of gas that is
different from the one available, it is necessary to
replace the burner nozzles.
The choice of the nozzles to replace must be
made according to the table of the “technical
characteristics” as enclosed.
Act as follows:
-Remove the racks and burners.
-by means of a straight spanner L, unscrew
the nozzle U (fig. 8) and substitute it with the
corresponding one.
-tighten the nozzle strongly.
Adjusting the burners
The lowest flame point must always be properly
adjusted and the flame must remain on even if
there is an abrupt shift from the maximum to the
minimum position.
If this is not so, it is necessary to adjust the lowest
flame point as follows:
-start the burner up;
-turn the tap up to the minimum position (small
flame);
-remove the knob from the tap rod;
-introduce a flat-tip screwdriver C in the hole F of
the tap (fig. 9-9A) and turn the by-pass screw up
to a proper adjustment of the lowest flame point.;
As regards propane gas burners, the by-pass
screw must be tightened completely.
MAINTENANCE
Replacing the power supply cable
If the power supply cable should be replaced, it is
necessary to use a cable with a section of 3 x 0.75
mm
2
, type H05VV-F or H05RR-F, complying with
the regulations in force.
The connection to the terminal board must be
effected as shown in fig. 10 and 10A:
brown cable L (phase)
blue cable N (neutral)
green-yellow cable (ground)