4. With a thin screwdriver, adjust the by-passscrew position.11 The by-pass screw– If you change from natural gas G20 20mbar to liquid gas, fully tighten the ad-justment screw in.– If you change from liquid gas to naturalgas G20 20 mbar, undo the by-passscrew approximately 1/4 of a turn.Warning! Make sure the flame does notgo out when you quickly turn the knobfrom the maximum position to the minimumposition.Electrical connection• The electrical work necessary to install theappliance must be done by a qualified elec-trician or competent person, according to thecurrent regulations.• The appliance must be earthed.• Always use a correctly installed shockproofsocket.• Make sure that there is access to the mainsplug after the installation.• Do not pull the mains cable to disconnectthe appliance. Always pull the mains plug.• The appliance must not be connected withan extension cable, an adapter or a multiplesocket. There is a risk of fire. Make sure thatthe ground connection complies with thestandards and regulations force.• The power cable must not touch any hotparts.• The electrical installation must have an isola-tion device which lets you disconnect the ap-pliance from the mains at all poles. The isola-tion device must have a contact openingwidth of minimum 3 mm.• You must have the correct isolation devices:line protecting cut-outs, fuses (screw typefuses removed from the holder), earth leak-age trips and contactors.• The connection cable parts must not beheated to a temperature above 90°C.Electrical RequirementsPermanent electrical installation must complywith the latest I.E.E. Regulations and local Elec-tricity Board regulations. For your own safetythe installation must be done by a qualifiedelectrician (e.g. your local Electricity Board, or acontractor who is on the roll of the National In-spection Council for Electrical Installation Con-tracting [NICEIC]).The manufacturer declines any liability ifthese safety measures are not observed.The appliance must be connected to a 230 V50 Hz AC electrical supply.Before activating the appliance, make sure theelectrical supply voltage is the same as that in-dicated on the rating plate. The rating plate islocated on the bottom of the appliance.The appliance is supplied with a 3 core flexiblesupply cord with a 3 amp plug. If it is necessaryto change the fuse, use a 3 amp ASTA-ap-proved (BS 1362) fuse.6 www.zanussi.com