Nu-Way MGN 2800N, Installation & Maintenance Manual

Page 1: ...MGN 2800N Gas Burner Installation Maintenance Manual...

Page 2: ...u way has the largest range of commercial spares available to the market Our Spares sales team collectively have more than 170 years employment with Nu way and are therefore more than experienced in o...

Page 3: ...High Gas Pressure Switch 9 Low Gas Pressure Switch 9 Gas Valve Train 9 ELECTRICAL DATA TABLE 9 WIELAND PLUG SOCKET CONNECTIONS 10 Air Gas Ratio Controller 11 Valve Proving Systems 11 Landis Staefa LD...

Page 4: ...ner Motor Only Runs Continuously 24 Replacement Of Air Gas Ratio Controller 24 Incorrect Rotation Of Burner Motor 24 Motor Fan Removal 24 SERVICE REPLACEMENT 24 BURNER HEAD DETAILS 25 BURNER PERFORMAN...

Page 5: ...MGN 2800N HP 4 BURNER COMPONENT IDENTIFICATION 1 8 15 4 6 17 13 2 3 16 7...

Page 6: ...Burner Flame Tube 12 Valve Proving Pressure Switches 4 Combustion Fan Motor 13 Electrical Connection Box 5 Combustion Air Inlet 14 Valve Proving Control Box 6 Combustion Air Damper Motor 15 Pilot Gas...

Page 7: ...ons to be fulfilled and the controls and adjustments to be used are dealt with in the sequence that should be followed for the correct assembly installation and use Pre commissioning and Commissioning...

Page 8: ...rol Package Hinged Extension and Flame Tube Assembly b Gas train complete Mode Two Comprising Three Units a Burner Body complete with Control Package b Gas Train Complete c Hinged Extension and Flame...

Page 9: ...gs All connecting pipework should be well supported and accurately positioned in order to avoid stressing the booster casing The use of flexible connectors which reduce both pipework stresses and tran...

Page 10: ...ted and pre wired to the gas train to ensure that if the gas pressure at the burner head increases above the gas pressure at maximum continuous running then the burner will shut down to a safe conditi...

Page 11: ...Burner Operating Hours Run Counter P2 Burner High Flame Hours Run Counter S1 Supply On Off Switch 1 2 3 B4 S3 T2 T1 N L1 T8 T7 T6 B5 3 PHASE FUSED ISOLATED SUPPLY 1 PHASE FUSED ISOLATED SUPPLY P1 H2 H...

Page 12: ...ystem then opens V3 in the start gas line and then closes it after 2 seconds b V1 V2 and V3 remain closed for 23 seconds while the minimum side of the gas pressure switch PS checks for an increase in...

Page 13: ...KP75 SKP15 Item Description 1 Main Safety Valve SKP15 2 Combined Valve Regulator SKP75 3 Pilot Solenoid Valve 4 Pilot Gas Governor 5 High Gas Pressure Switch 6 Burner Connection Flange 7 Low Gas Press...

Page 14: ...EW AIR DAMPER MOTORS H L 9 8 7 6 5 4 3 2 1 N Berger Lahr STM 30 B2 Berger Lahr STM 30 Q5 Note The fully closed cam is factory set and under normal circumstances should not require further adjustment O...

Page 15: ...scale at the end of the cam stack serves as a position indicator The air damper assembly can be rotated manually by disconnecting from the drive motor using the lever A The cams should be adjusted by...

Page 16: ...anel is fitted to the rear left hand side of the burner fan casing The panel is of the fully enclosed type containing the fan motor starter relays burner sequence control RWF40 modulating controller A...

Page 17: ...will not enter the controller but run back into the combustion chamber If necessary a water separator must be provided EMERGENCY INSTRUCTIONS This product has been designed and constructed to meet al...

Page 18: ...emblies are fully tested for function and valve security before despatch A soundness test of the gas valve is difficult without specialised pressure testing equipment However the following check can b...

Page 19: ...er on and allow it to establish low flame Gradually open the upstream manual valve to the fully open position keeping a watchful eye on the CO level If the CO content is excessive adjust the low fire...

Page 20: ...al Switch off the burner Remove the control panel cover and disconnect the flame signal check link Connect a DC microammeter Refer only to the wiring diagram appropriate to the control fitted on the b...

Page 21: ...electrical supply The burner will now operate until switched off a by controlling instruments of the appliance b manually c by power failure On restoration of power the burner will restart automatica...

Page 22: ...pted A value can only be altered within the permitted range of that parameter All other parameters must remain as supplied Note The detector range parameters SCL and SCH are given as C for Hot Water t...

Page 23: ...er runs through its start cycle c Re tighten the screw in the pressure test point and reset the lockout button on the valve proving system ROUTINE MAINTENANCE Switch off electrical supply and gas supp...

Page 24: ...erminals Satronic TMG 740 Terminals 17 16 Landis Staefa LFL 1 3 Terminals 4 13 If the air pressure switch is not in the start position turn the setting dial clockwise If no continuity is obtained the...

Page 25: ...e any two phases In normal circumstances this will correct the rotation Motor Fan Removal Should the motor or combustion air fan need replacing the following procedure can be followed Disconnect the g...

Page 26: ...0 4 5 6 1 2 3 11 9 7 10 8 255 234 Projection Item Description Item Description 1 Gas Nozzle 7 Diffuser Mounting Stud 2 Flame Tube 8 Diffuser Plate 3 Pilot Gas Tube 9 Gas Train Adaptor 4 Inner Assembly...

Page 27: ...inimum gas supply pressure is obtained by summing the combustion chamber resistance and combined burner head and line loss shown as solid lines A further 2 5 mbar should be added to allow for manufact...

Page 28: ...Type Size Serial No Burner Type Size Serial No Commissioning date Guarantee Expiry date Gas type Gas Pressure upstream of main gas governor a Standing mbar b Running mbar Gas pressure at burner head m...

Page 29: ...MGN 2800N HP 28 BURNER SERVICE RECORD The details below are to be completed by the Servicing Engineer DATE DETAILS OF MODIFICATION...

Page 30: ...MGN 2800N HP 29 BURNER SERVICE RECORD The details below are to be completed by the Servicing Engineer DATE DETAILS OF MODIFICATION...

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Page 32: ...Enertech Limited P O Box 1 Vines Lane Droitwich Worcestershire WR9 8NA tel 44 0 1905 794331 fax 44 0 1905 794017 email info nu way co uk web www nu way co uk...