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Summary of Contents for Nu-Way MGN 3300
- Page 1 Installation & Maintenance Manual MGN 3300 - 4000 Gas Burner Tel: +44 (0) 1905 794331 Fax: +44 (0) 1905 794017 Email: info@nu-way.co.uk Web: www.nu-way.co.uk...
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Page 2: Table Of Contents
……………………………………………………………………… 12 In An Emergency ……………………………………………………………………… 12 Inspection ……………………………………………………………………… 12 Initial Settings ……………………………………………………………………… 13 Burner Dry Run ……………………………………………………………………… 15 Burner Live Run ……………………………………………………………………… 15 Final Checks ……………………………………………………………………… 19 On Completing Commissioning ……………………………………………………………………… 19 MGN 3300 & MGN 4000 Page 1... - Page 3 Burner Motor only runs Continuously …………………………………………………………………. 23 Spare Parts …………………………………………………………………. 23 APPENDIX ……………………………………………………………………………………….. 24 Combustion Head Details – MGN 3300 and MGN 4000 …………………………………………..Burner Performance Envelopes and Supply Pressures …………………………………………….. 25 COMMISSIONING SHEET ……………………………………………………………………... 28 BURNER MODIFICATION RECORD ………………………………………………………….. 29 IMPORTANT –...
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Page 4: Burner & Component Indentification
BURNER & COMPONENT IDENTIFICATION for MGN 3300 & MGN 4000 BURNERS Standard Burner Arrangement shown All dimensions are in mm. Item Description Burner Casing Flame Tube Fan Motor Air Inlet Control Panel Gas Train Air Pressure Switch MGN 3300 & MGN 4000... - Page 5 BURNER & COMPONENT IDENTIFICATION for MGN 3300 & MGN 4000 BURNERS Standard Burner Arrangement shown All dimensions are in mm. MGN 3300 & MGN 4000 Page 4...
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Page 6: Introduction
Plant Room Ventilation The burner must be supplied with dust-free air at sufficient rates for all firing conditions, in accordance with the appropriate Standards. MGN 3300 & MGN 4000 Page 5... -
Page 7: Existing Appliances
Connect the multi-pin plug on the gas valve train to the socket on the rear of the control package. Note: In some circumstances it may be advisable to fit the burner casing to the appliance before attaching the gas control train. MGN 3300 & MGN 4000 Page 6... -
Page 8: Installation
If the burner is supplied as part of a packaged appliance/burner unit refer to the appliance manufacturer’s instructions. ELECTRICAL DATA Electrical Connections Electrical Power Requirements MGN 3300 MGN 4000 Units Mains Supply V±10% Frequency Burner Motor Start Current Full load Current 15.0 22.8 15.0 22.8 29.7 MGN 3300 & MGN 4000 Page 7... - Page 9 Control Loop is via Alarm 1 in TLK Control For Modulating remove plug-in loose connector on control pack WATER TEMP. SENSOR PRESSURE TRANSMITTER KTY 81 - 121 0-20 mA OUTPUT BLACK MIDAS JP 401001 MGN 3300 & MGN 4000 Page 8...
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Page 10: Booster Wiring Details
BOOSTER WIRING DETAILS This applies to a Nu-way single booster wired to drawing numbers WA4-6278 or WA4-6770 only. For further details please refer to Nu-way. Live wire from burner to terminal 13 on the burner terminal block Booster terminals Link terminals 4 to 7... -
Page 11: Control Panel
Valve Proving System A valve proving system, as shown schematically, is standard on all MGN 3300 and MGN 4000 burners. When the burner operating sequence is initiated, the burner control box energises the proving system, which then carries out the following checks: Valves V1, V2 and V3 are initially closed. -
Page 12: Burner Operating Sequence
The pre-purge times shown refer to the control box only. The air damper control will extend the total burner purge time up to a maximum of 127 seconds depending on the firing rate and air requirements of the appliance. MGN 3300 & MGN 4000 Page 11... -
Page 13: Commissioning
Confirm that the operation of adjacent plant and machinery will not constitute a hazard to the personnel involved in commissioning. MGN 3300 & MGN 4000 Page 12... -
Page 14: Initial Settings
Replace the cap. Never adjust the governor to its maximum setting. 4. Set the ignition electrode gap to 2.5 to 3 mm. MGN 3300 & MGN 4000 Page 13... - Page 15 Adjustment and indication of the parallel displacement of the characteristic (Low Fire Setting) Vented to atmosphere Connection to the gas line Connection to the combustion air supply at the burner head Indication of the valve stroke MGN 3300 & MGN 4000 Page 14...
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Page 16: Burner Dry Run
SMELL OF GAS the gas and electricity supplies must be isolated and the leak sealed before proceeding. The appliance is in an appropriate and safe condition to be fired. The appliance controls are set to call for heat. MGN 3300 & MGN 4000 Page 15... - Page 17 Gas Supply Pressure The main gas safety valve is capable of withstanding gas inlet pressures up to 200 mbar. For MGN 3300 and MGN 4000 burners it is essential that the inlet gas pressure shall not be less than 45 mbar and not be more than 100 mbar in order to maintain good control characteristics of the air/gas ratio controller.
- Page 18 Make small adjustments and check the gas rate after each change. Switch off the burner and the electrical power supply to the burner. Remove the control panel cover and replace the pilot check link. MGN 3300 & MGN 4000 Page 17...
- Page 19 Turn the adjusting dial anti-clockwise slowly until the burner restarts and main flame is established. Repeat step (4) above. Turn the dial a further two divisions anti-clockwise. Switch off the burner and the electrical power supply to the burner. Replace the pressure switch cover. MGN 3300 & MGN 4000 Page 18...
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Page 20: Final Checks
Re-tighten the screw in the pressure test point and reset the lockout button on the valve proving system. MGN 3300 & MGN 4000 Page 19... -
Page 21: Routine Maintenance
Replacement of the air/gas ratio controller and the subsequent recommissioning shall be undertaken only by appropriately qualified and experienced personnel. MGN 3300 & MGN 4000 Page 20... -
Page 22: Fault Finding
If a gas booster is fitted: Ensure that the low inlet gas pressure switch is not locked out. Check that the booster drive belt is fitted. Verify that the booster motor is rotating correctly. MGN 3300 & MGN 4000 Page 21... -
Page 23: Fans Starts And Burner Goes To Lockout
Remove the screw which holds the control system to its mounting bracket. Lift the control system from its mounting bracket and rest it on the gas valve train. The securing studs, fixing nuts and bolts on the mounting flange are now accessible. MGN 3300 & MGN 4000 Page 22... -
Page 24: Main Flame Is Not Established
Air setting incorrect Reset Spare Parts For spare parts contact Nu-way’s Parts And Components Division at the address and telephone number listed on the rear cover of this manual. To avoid delays, please provide the burner model and serial numbers. -
Page 25: Appendix
APPENDIX Combustion Head Details MGN 3300 and MGN 4000 All dimensions are in mm. Item Description Nozzle Flame tube Start gas tube Inner assembly elbow Electrode Diffuser mtg stud diffuser Gas train adaptor Centralising assembly Casing MGN 3300 & MGN 4000... -
Page 26: Burner Performance Envelopes And Supply Pressures
The burner head gas pressure curves are supplied as a guide only, and are not intended to replace a full burner commissioning procedure using certified test equipment. The burner outputs are based on the gross calorific value of natural gas (38.56 MJ/m MGN 3300 & MGN 4000 Page 25... - Page 27 MGN 3300 & MGN 4000 Page 26...
- Page 28 MGN 3300 & MGN 4000 Page 27...
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Page 29: Commissioning Sheet
Running: mbar Gas pressure at burner head mbar in wg Gas rate Heat input MJ/h Btu/h Gross flue gas temperature °C °F Ambient temperature °C °F Nett flue gas temperature °C °F Efficiency MGN 3300 & MGN 4000 Page 28... -
Page 30: Burner Modification Record
BURNER MODIFICATION RECORD DATE DETAILS OF MODIFICATION MGN 3300 & MGN 4000 Page 29... - Page 31 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...
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