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MDFL 3300 & MDFL 4000 Issue 2 08/08

Page 12

TYPICAL GAS TRAIN

Item

Description

Item

Description

1

Manual Gas Interlock Valve

5

Control Valve

2

Low Gas Pressure Switch

6

Pilot Solenoid Valve

3

Main Valve

7

Pilot Governor

4

Valve Proving System

8

High Gas Pressure Switch

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Содержание MDFL 3300

Страница 1: ...Installation Maintenance Manual MDFL 3300 MDFL 4000 Dual Fuel Burner 11 12 Tel 44 0 1905 794331 Fax 44 0 1905 794017 Email info nu way co uk Web www nu way co uk...

Страница 2: ...r 11 Gas train 12 Oil Controls Single Spill Back Nozzle 16 Control Panel 20 Burner Controller 20 Modulating Controller 20 BURNER OPERATING SEQUENCE 22 MODULATING CONTROLS 23 Controller 23 Commissionin...

Страница 3: ...is essential that the following instructions and adjustments are carried out by qualified engineers that are experienced in forced draught gas and pressure jet oil burner commissioning In the UK it i...

Страница 4: ...Pressure Switch 7 Burner Terminal Panel 19 Flexible Oil Pipe 8 Casing Access Lid 20 Quick Release Oil Couplings 9 High Gas Pressure Switch 21 Pressure Gauges 10 Valve Body 22 Oil Manifold 11 Control V...

Страница 5: ...MGN 3300 MGN 4000 Page 4 BURNER MOUNTING ARRANGEMENT MDFL 3300 MDFL 4000 Issue 2 08 08 Page 4 BURNER MOUNTING ARRANGEMENT MODELS MDFL 3300 4000 Hole Diameter 350mm...

Страница 6: ...er For example a burner designated MDFL 3300 36 is a model 3300 with a 36cm diameter combustion air fan impellor Controls and Safety Systems MDFL burners are fitted with a combustion airflow control a...

Страница 7: ...riately 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 the burner to be isolated for maintenance...

Страница 8: ...priately rated for the maximum oil flow rate anticipated Galvanised steel pipe should not be used The supply pipework should include an appropriate filter The final connection to the oil pump inlet po...

Страница 9: ...be maintained and all exposed pipework must be lagged 3 If a shut off valve is fitted in the supply line to the burner oil pump inlet then a pressure relief valve MUST also be fitted to prevent damage...

Страница 10: ...that lifting gear should be employed if necessary INSTALLATION General Ensure that the appliance is suitable for the heat input of the burner If there is any doubt in this area reference should be ma...

Страница 11: ...as pressure switch is fitted at the outlet of the gas train to ensure that any increase in gas supply pressure above the level needed to maintain the set conditions results in a safe burner shutdown I...

Страница 12: ...ts mounted on a common shaft within the Modulating Cam Box 2 The operation and adjustment of the Modulating Cam Box arrangement should be fully understood before attempting to adjust the motor setting...

Страница 13: ...Page 12 TYPICAL GAS TRAIN Item Description Item Description 1 Manual Gas Interlock Valve 5 Control Valve 2 Low Gas Pressure Switch 6 Pilot Solenoid Valve 3 Main Valve 7 Pilot Governor 4 Valve Proving...

Страница 14: ...n continuously operating flue gas damper or the combustion chamber pressure changes from negative to positive whilst moving from Low to High flame then a compensating circuit is required This means th...

Страница 15: ...on of the burner control circuit prior to burner start up The proving test is based upon the 2 stage pressure proving principal First the main safety valve V1 on the upstream side of the gas circuit i...

Страница 16: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 15 VALVE PROVING SYSTEM LDU 11 Standard fitting...

Страница 17: ...imum performance under the specified operating conditions Any queries regarding the size of the nozzle should be referred to Nu way The nozzle is held in position by the inner assembly lance through w...

Страница 18: ...OIL PUMPING SET FOR DISTILLATE FUELS Connection Sizes Item Description Size inches 1 Main Inlet Connection 1 2 Main Return Connection Optional 1 3 Burner Feed 4 Burner Return Mounting Dimensions Burn...

Страница 19: ...il Pump with TV Pressure Regulator Connection Sizes Item Description Size P Pressure port R Return port S Suction port Pn Vacuum gauge i t l b l Ps Pressure gauge 1 Regulator cap nut 2 Washer 3 Regula...

Страница 20: ...All interconnecting pipework must have a minimum bore of 19mm and must be pressure rated for 42 kg cm2 2 Solenoid valves are shown as either NO normally open or NC normally closed 3 Pipework connecti...

Страница 21: ...PERATURE PRESSURE in the appliance Also located on this enclosure are the fuel selector switch and two additional neon lights The amber light is illuminated when OIL is the chosen fuel and the red lig...

Страница 22: ...to drive to open position proved by servo motor limit switch P Yes Lockout caused by the failure of the air pressure switch to changeover from the no air position shortly after the start of the pre pu...

Страница 23: ...ed by the pressure and or temperature requirements of the appliance Time seconds LFL 1 333 Description T1 40 Pre purge T2 6 Pre ignition T3 3 Safety lockout time T4 Not applicable to two stage or full...

Страница 24: ...sition between low and high flame Commissioning Controls Two switches Hand Auto and Inching are included in the burner panel In auto mode the burner will respond to the demand of the boiler via the RW...

Страница 25: ...hat the electrical wiring is complete and complies with all applicable Codes and Standards 2 Ensure that the fuses are fitted and of the correct ratings 3 Check electrical earthing 4 Verify that the g...

Страница 26: ...n scale 1 to 0 8 by adjusting screw 1 anti clockwise to increase clockwise to decrease Set the ratio on the remaining scale to half a division on the positive side of 0 by adjusting screw 2 in the sam...

Страница 27: ...n the burner at the control panel The modulating unit cam shaft should now rotate to the high flame setting and the combustion fan motor will start the air pre purge phase 11 Allow the fan motor to ru...

Страница 28: ...that it gives approximately 1 5mm throw 3mm stroke and lock in position 2 Check to ensure that the spill valve push rod bears slightly against the oil cam refer to page 29 3 Rotate the air cam adjust...

Страница 29: ...satisfactory flame is achieved again check the line and spill pressures 11 Inch the camshaft back to the low flame position The oil consumption rate should now be between 40 and 50 of the rated maximu...

Страница 30: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 29 MODULATING CAM BOX...

Страница 31: ...al Premises 4 Open the control panel cover and set the burner for low flame hold On modulating burners not fitted with a low flame hold switch set the Hand Auto switch to the Hand position 5 If a gas...

Страница 32: ...at required for the maximum required continuous output from the burner and not more than 200 mbar Before proceeding with commissioning 1 Fit a manometer or other approved pressure measuring instrument...

Страница 33: ...o the diagram on page 13 until an acceptable figure is achieved In extreme cases the adjustment on screw 2 may be exhausted without achieving an acceptable CO level In this event reset the high fire a...

Страница 34: ...burner Allow the burner to light and establish the start gas flame 4 Check the gas flow rate The appropriate setting is usually found between 25 and 30 of the main flame gas rate The start gas rate mu...

Страница 35: ...other approved pressure measuring instrument to the pressure switch to enable a comparison to be made between the pressure switch indicator and the measured pressure if required 3 Remove the control p...

Страница 36: ...made in small increments with time given to see how the burner is reacting to the changed parameter Press and hold the PGM button down until the green set point figure changes to an AL the larger upp...

Страница 37: ...eer shall prepare a report which shall contain the following 1 Details of any modifications made to the system together with revised drawings if necessary 2 Customer and plant details including any se...

Страница 38: ...on oil for a prolonged period it may be necessary to purge the gas line of air 6 If the burner is to be operated with gas for a prolonged period it may be desirable to remove the oil pump couplings RO...

Страница 39: ...ct the ignition leads Remove the two screws which secure the oil manifold within the hinged extension Remove the four bolts which locate the inner assembly and withdraw the assembly taking care not to...

Страница 40: ...al Landis Staefa LFL 1 333 Terminals 13 and 14 4 If the air pressure switch is not in the start position turn the setting dial clockwise fully to the maximum setting Check again for continuity between...

Страница 41: ...e followed 1 Switch off the burner and the electrical power supply to the burner 2 Disconnect the multi pin plug from the socket on the control system 3 Remove the screw which holds the control system...

Страница 42: ...fully modulating burners additional data at intermediate positions in the operating range between high and low fire are required A copy of the completed sheet must be sent to the appliance manufactur...

Страница 43: ...Electrode Setting Details MDFL 3300 MDFL 4000 Issue 2 08 08 Page 42 All dimensions in mm...

Страница 44: ...MDFL 3300 MDFL 4000 Issue 2 08 08 Page 43 Performance Envelopes MDFL 3300 and MDFL 4000 MDFL 3300 MDFL 4000...

Страница 45: ...Guarantee Expiry Date Fuel Oil Type Oil pressure upstream of pump Standing bar or psi Running bar or psi Firing Rate High Fire Intermediate Positions Low Fire Units 1 Oil bar or psi Pressure at burner...

Страница 46: ...piry Date Fuel Oil Type Gas pressure upstream of main governor Standing mbar or ins wg Running mbar or ins wg Firing Rate High Fire Intermediate Positions Low Fire Units 1 Gas mbar or ins wg Pressure...

Страница 47: ...CORD The details below are to be completed by the Servicing Engineer This sheet to be completed and signed following each service adjustment Date Details of Service Signature MDFL 3300 MDFL 4000 Issue...

Страница 48: ...NOTES MDFL 3300 MDFL 4000 Issue 2 08 08 Page 47...

Страница 49: ...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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