Burner Control AAUS 620 L20 - SES Combustion AB

AAUS 620 L20 / AASD 820 L20Program Sequence6. Storage, Installation Instructions and LifetimeDevice are to be stored in a dry and dust-free place. Ambient temperature during storage shall be0 – 60°C. No operation and storage below dew point. Moisture must not exceed 60%. Device shall be protectedfrom mechanical damages.The device has a limited service live. It is designed for appr. 250,000 start ups. For 50 start ups per day its lifetimewould be about 10 years. This time decreases under bad conditions e.g. dust, high or low temperature, moisture,vibrations, aggressive gases.When the appliance has reached the end of its lifetime it must be disposed of according to local regulations.6.1 Hardware• Screw wiring base (Dimensions see page 4) directly to the wall surface or a mounting plate (switchbox).or• Retrofit the wiring base with a track mounting set (available separately) with snap fittings for profile tracks6.2 Wiring• To be done only by authorized personnel.• Follow local standards and regulations.• Install cable through rubber knock-out ports or breakable knock-out ports in the bottom section.• Install external fuse (6 A) in supply line.• Connect Burner Control System according to the connection diagram on page 5 or 6.• Check the Burner Control System for correct voltage before connecting to power source. (Specification tag ondevice).• Integration into the existing burner management system.Warning: Remove or install the upper section only after switching off power supply. There is the danger ofa short circuit if the power supply is not switched off!Safety related equipment! In case of a break down the unit has to be returned to the manufacturer for inspection.8

AAUS 620 L20 / AASD 820 L207. Start-up• Switch on the main power supply (HS), the Supply voltage (term. 5 and 9) is releasedThe Burner Control System runs a self-check (0.5 sec).• Flip toggle switch up to Automatic ´I´.• After that, release the operating voltage (S1). The Burner Control System immediately releases the voltage tothe ignition transformer and to the ignition gas valve (term. 3 and 4). The flame is able to build, the ignitiontransformer is switched off after the ignition safety period, which avoids interference of the flame signal.• After the cycle of the ignition safety period (3 sec.), the burner/ ignitor should be in operation (terminal 7,8 andvolt free contact term. 11, 14 are released.LED display in the front panel should indicate normal operation.8. TroubleshootingIrregularities during the start or operation of the burner/ ignitor lead to an emergency shutdown with interlock:Reset by flipping toggle switch down for a few seconds also remote reset is possible (installation at site).8.1 Ignitor flame not buildingPossible Causes: 1. No sparkling 1.1 Ignition electrode has a short circuit;replace. Verify the correct spacing.Also, clean the ignitor1.2 Ignition transformer is defective;replace2. No Gas 2.1 Gas pipe too long; install the valve asclose to the burner/ignitor as possible2.2 Gas pipe still contains inert gas e.g.N 2 . Keep attempting to ignite, untilthe pipe is filled with fuel2.3 Valve defective; replace3. Air/Gas ratio not correct 3.1 Check the gas and air pressures,also correcting the correspondingdevices.3.2 Is the gas type correct?3.3 Is the combustion air clean?8.2 Flame builds, but no flame signal present.Possible Causes:1. Ionisation electrode is burnedup or deformed2. Ceramic Isolator of thelonisation electrode broken3. Burner/Ignitor was switched offdue to the high temperature ofthe fire room. Ceramics are toohot, the insulation resistancehas dropped to a value that istoo low.4. The setting of the gas and airpressures at the burner/ignitorare not correct. Flame root isnot in the area of the lonisationelectrodeReplace electrodeReplace ceramic insulatorLeave the blast air on cool setting,making sure the burner/ignitor isswitched off.Adjustment and correction of thecorresponding devices.9

AAUS 620 L20 / AASD 820 L208.3 Automatic Shut-down During OperationPossible Causes:1. Fluctuating burner roompressures, which causes theflame to break upPossibly provide differential pressurecontrol for the air supply2. Pilot flame is stronglyinfluenced or suffocated bythe main flame8.4 Burner Control System Registers Error Upon Start-upPossible Causes:1. Operating voltage is releasedat the same time as theground voltage.2.1 Change the ignitor position2.2 Install the proper ignitor for theapplicationThe operating voltage must follow theground voltage by at least 0.5seconds.Change the switch timing.8.5 Automatic shut-down at start-up when a flame registers before the openingof the ignition gas valvesPossible Causes:1. Flame is not extinguishedfrom the previous shut-downdue to a leaky valve and is stillpresent when system isrestartedReplace gas valve8.6 Electrical MalfunctionsPossible Causes:2. Air in the area of the electrodeionises (> 600°C )Burner Control System doesnot start upBurner/Ignitor and BurnerControl System arefunctioning, but there is nosignal over the integratedpotential-free contactCooling air not present!Integrated 2 A-Fuse F2 defectiveIntegrated 2 A-Fuse F1 defective9. MaintenanceThe Burner Control Systems are maintenance-free. Please send defective devices in for repair. Do not attempt anyrepairs on-site, as opening the Burner Control System could void warranty service. Burner Control Systems aresafety components for gas burning facilities.Reminder• Installation and maintenance procedures may only be carried out by authorized personnel• Upon installation, follow local standards and regulations• Improper installation or customer side modifications/alterations of the device can cause personalinjury or equipment damage10

AAUS 620 L20 / AASD 820 L2010. Approvals11

AAUS 620 L20 / AASD 820 L2012

AAUS 620 L20 / AASD 820 L2013