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SYSTEMA S.p.A.AIRTIGHT GAS-FIRED RADIANT TUBES INFRAa) For Natural gas G20: upstream on the main line, after the counter, always install a pressure stabilizer and a pressuregauge with scale 0÷60 mbar (0.06 bar) and regulate the pressure at 20 mbar (0.02 bar); a higher pressuremay create bad combustion, difficulty in lighting the flame and holes in the radiating pipes due to excessive temperature.b) For LPG (G31): near the tank it is indispensable to install a “1st stage” pressure reducer so as to reduce the pressureto 1.5 bar; on the main external line in the shed, always install a “2nd stage” pressure reducer to reduce thepressure as indicated in the table on page 50. A higher pressure may create bad combustion, difficulty in lightingthe flame and holes in the radiating pipes due to excessive temperature.c) Upstream and downstream from the main gas supply line it is advisable to install a pressure gauge in a visible positionwith scale 0÷60 mbar (0.06 bar) so as to see any difference in pressure upstream and downstream and thereforethe capacity of the whole network.d) Regulating the gas supply pressure: all the appliances are tested and calibrated in the factory for the pressures forwhich they are intended (see data plate on the burner).To check the burner pressure (Natural gas G20), use the pressure outlet indicated in point 2 (fig. 55) at the outlet of theelectrovalve after having removed the closing screw; if the pressure values in the burner do not correspond, calibrationmust be performed (with the burner operating) by turning the pressure regulating screw indicated in point 3 (fig. 55) onthe side of the valve until the rated value is obtained.IMPORTANT: please seal the adjustment device of the gas valve after completing adjustmentIMPORTANTFor Natural gas supply with pressures higher than 20 mbar (approx. 200 mm), always provide apressure stabilizer for each appliance and regulate the pressure at 20 mbar.For LPG gas (Butan-Propane G30-G31), the regulator for the solenoid has been excluded. To carry out this operationthe pressure regulator with the valve, indicated at number 3 (see fig. 55) has to be completely closed. To check thepower supply pressure use the pressure tube postioned in the solenoid valve entry (with the burner operating), indicatedat number 4 (see fig. 55). If the output of the power is not sufficient, it will be necessary to proceed with a setting(Burner operating) on the pressure regulator positioned on the top of the system (valve).At the end of the above pressure-regulating operations, always remember to close the pressure outlets on the electrovalvewith the screws provided.IMPORTANT: please seal the adjustment device of the gas valve after completing adjustmentRev. 18GB061042
AIRTIGHT GAS-FIRED RADIANT TUBES INFRA8 ELECTRICAL SYSTEMSYSTEMA S.p.A.8.1 Connection diagram for CE/A type control panelsTo connect the control panels for series CE burners, refer to the wiring diagram shown in fig. 45 and fig. 46.In particular:a) Use an electric cable composed of 6 leads necessary for the phase, neutral, earth, appliance reset, operating warninglight and block warning light.b) Ensure that the appliance is correctly earthed and respect the phase and neutral connection, otherwise seriesCE/A control panels will be subject to breakdown.c) Position the environment thermostat at a height of 1.50÷1.80 mt above ground and in an area where the globothermostatprobe can be within “sight” of the radiating pipes; only in this way can the probe receive the infraredradiation emitted by the pipes and thus control the local comfort conditions (see fig. 44).ELECTRIC CONTROL PANELWITH GLOBOTHERMOSTAT PROBEFig. 44 Positioning of the globothermostat probe43Rev. 18GB0610
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