Nu-Way MG860-LN T3S Installation & Maintenance Manual
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Contents
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9E.06.99 • G. 21.09.1118 Adjustment of the burner headSet the position of the burner head according toburner output in accordance with the table on page15ff.19 Control unit DMG 972Testing the control unit for proper functioningDanger of fatal injury from electric shocks!Disconnect electrical cable from power supply beforecarrying out any work on live parts!Troubleshooting may only be carried out by authorisedand trained personnel! Unlocking may only be carriedout by an authorised specialist.Carry out the following checks after commissioning and each time after the burner has been serviced:bypass the gas pressure monitor by disconnecting the grey cube connector on the compact unit. Close theball valve while operating the burner with the gas pressure monitor bypassed: the unit must go into faultmode immediately after flame failure occurs. Start-up with ball valve closed and gas pressure monitor by-passed: the unit must go into fault mode after expiry of the safety period.After checking the connection, cancel the fault and restore the unit to its original state. Check the air pres-sure switch contact: the unit must go into fault mode after the silicone connecting hose is disconnected.Re-connect the hose to coupling "+".Bypass the air pressure switch before start-up: a fault warning is indicated briefly after 10 sec., after whichthe warning resets automatically. A second start-up attempt is made. If the air pressure switch contact isstill closed, a full failure shutdown will occur. If the air pressure switch opens the contact within 10 sec., theburner will go into operation.Safety and switching functionsIn the event of flame failure during operation, the fuel feed is shut off immediately and the burner goes intofault mode within 1 sec.A restart always takes place following a mains power failure.If a flame signal is given during the pre-ventilation phase, a failure shutdown will occur immediately.The position of the air pressure controller is continuously checked. There can be no start-up if it is not in itsneutral position. If the NO contact does not close or reopens during the pre-ventilation phase, a failure shut-down will occur. If there is an insufficient supply of air during operation, the air pressure controller contactopens and the valves close immediately. The device switches to fault mode within 1 sec. |
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