This article covers maintenance and cleaning of the PC751 by Boretti.
Gas connection
Make sure that the appliance is adjusted for the gas type available (see the label under the appliance). Follow the instructions indicated in the chapter "gas transformations and adjustments" for the possible adaptation to different gases. The appliance must be connected to the gas system by means of stiff metal pipes or flexible steel pipes having continuous walls, in compliance with the regulations in force. Some models are equipped with both cylindrical A and conical B connectors for gas supply (fig. 7). Please select the type which is correct for the supply concerned. The connection must not stress the gas ramp. Once the installation is over, check the connection seal with a soapy solution. 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 connction in compliance with the regulations and provisions of the law. Grounding is compulsory. This device must be at a suitable opening distance from the contacts in order to allow the entire disconnection in case of overvoltage category III, in accordance with installation rules. 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 in the hole F of the tap (fig. 9) and turn the by-pass screw up to a proper adjustment of the lowest flame point. As regards G30 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 3x0.75mm², type HO5VV-F or H05RR-F, complying with the regulations in force. The connection to the terminal board must be effected as shown in fig. 10 - 10/A: brown cable L blue cable N green-yellow cable (phase) (neutral) (ground)