Nu-Way MGN 2800N Installation & Maintenance Manual

Nu-Way MGN 2800N Installation & Maintenance Manual Manual pdf 9 page image

MGN 2800N HP 8SERVICES & SITE CONDITIONSGas SupplyThe gas supply pipework to the burner must be appropriate to local conditions and must beconstructed and installed in compliance with appropriate Codes and Standards. It shall be ofsufficient size to satisfy the pressure and volume flow requirements of the burner under all firingconditions. Checks should be made to ensure that all meters and other components areappropriately rated for the maximum gas flow rate anticipated.It is essential that a 90° manual isolation valve is fitted upstream of the gas control train to allow theburner to be isolated for maintenance. The size of this valve should not be less than that of theburner control train in order to avoid any restriction in gas flow.Gas BoostersWhen a gas booster is used the gas pressure at the booster inlet must not fall below 10 mbar underany conditions. A low gas pressure switch must be fitted on the upstream side of the booster toprevent it starting if the supply pressure is insufficient. An additional pressure switch can be used tomonitor the pressure downstream of the booster to prevent the burner operating if the pressure isinsufficient.The booster should be installed as near to the burner as possible. It should be positioned on a firm,flat, horizontal surface using anti-vibration mountings. All connecting pipework should be wellsupported and accurately positioned in order to avoid stressing the booster casing. The use offlexible connectors, which reduce both pipework stresses and transmitted noise, is stronglyrecommended. The gas supplier should be asked to recommend the size of pipework between themeter and the booster to ensure that the required pressure and flow are available.InstallationGeneralCheck that the burner is appropriate for appliance rating. Detailed burner performance data is givenat the back of this handbook.Fitting To The ApplianceIf the burner is to be fitted to a new packaged unit, refer to the manufacturers recommendations.If the burner is to be used with an existing appliance prepare the mounting flange as detailed in theBurner And Components Identification section. Ensure the joint between appliance and burner iseffectively sealed with the gasket provided. The flame tube should be flush with the inner face of theappliance combustion chamber except where extensions are specified by the appliance manufacturer(i.e. reverse flame boilers).Electrical Power SupplyConnect a three phase 50 Hz electrical supply to the burner observing all applicable IEE Regulations.Refer to the connection diagrams on pages 10 or the wiring diagram contained in the instruction packattached to the burners. If supplied as a packaged appliance/burner unit refer to the manufacturersinstructions.Connect the external auxiliary controls by reference to the appropriate connection/wiring diagram.