Nu-Way MDFL 3300 Installation And Maintenance Manual

Nu-Way MDFL 3300 Installation And Maintenance Manual Manual pdf 31 page image

COMMISSIONING : GASBurner Dry Run – MDFL 3300 & MDFL 4000The following procedure should be followed. It is important that complete and flawless dry run becompleted before fuel is supplied to the system:IT IS RECOMMENDED THAT THE BURNER SHOULD BE COMMISSIONED FOR OIL FIRING IN THE FIRSTINSTANCE. SHOULD OIL NOT BE AVAILABLE TO THE BURNER THEN GAS COMMISSIONING CANPROCEED ONLY IF THE PUMP DRIVE COUPLING IS REMOVED FROM THOSE BURNERS WHERE THEOIL PUMP IS DRIVEN BY THE BURNER FAN MOTOR .IT MUST BE NOTED IN ALL CASES THAT WHEN OIL IS AVAILABLE TO THE BURNER THE UNIT MUSTBE RE-COMMISSIONED ON BOTH FUELS. NOTICE SHOULD BE MADE OF THIS FACT, BOTH AT THEBURNER AND WITHIN THE BURNER HANDBOOK AND APPLIANCE LOG BOOK.Important Note regarding Combustion Air Settings:-IF THE BURNER HAS ALREADY BEEN COMMISSIONED ON OIL, THE COMBUSTION AIR SETTINGMUST NOT BE RE-ADJUSTED. THE GAS RATE MUST BE MATCHED TO THE EXISTING SETTINGS.1. Check that the gas, oil and electrical power supplies to the burner are turned off. Turn the fuelselector switch on the control panel to the gas position.2. Check that the manual gas isolation valve at the inlet to the gas train and the ball valve in the oilline are closed.3. Check that the gas pipework between the plant isolation valve and the safety shut-off valveshas been tested for soundness and purged in accordance with an appropriate procedure, forexample, IGE/UP/1 “Soundness Testing and Purging on Industrial and Commercial Premises”.4. Open the control panel cover and set the burner for low flame hold. (On modulating burners notfitted with a low flame hold switch, set the Hand/Auto switch to the “Hand” position).5. If a gas booster is fitted, ensure that it is turned on.6. Remove the cover from the low gas pressure switch and fit a temporary link between terminals2 and 3. Replace the cover.7. Set the air pressure switch to minimum.8. Establish the electrical supply to the burner and momentarily switch on the burner. Observe therotation of the combustion air fan motor, which should be anti-clockwise viewed from the motorend. If the direction of rotation of the fan motor is incorrect refer to the Section of this handbookon Fault Finding.9. If the fan rotation is correct switch on the burner.10. The burner motor will begin to run:a. Immediately if the system was switched off during normal operation.b. On pressing the reset button on the control box.If at this stage the burner goes to lockout, refer to the Section on Fault Finding.11. The burner will proceed through its ignition sequence. Check that an ignition spark is present.If there is no spark and the burner goes to lockout the air pressure switch may requireadjustment – refer to the Section on Fault Finding.12. The ignition spark will cease and the system will go to lockout. Switch off the burner and theelectrical power supply to the burner.13. Switch off the gas booster (if fitted). Remove the temporary link fitted to the low gas pressureswitch and replace the cover.14. The burner’s safety systems have now been proven and commissioning can proceed to the nextstage.MDFL 3300 & MDFL 4000 Issue 2 08/08 Page 30