American Dryer Corp MLS-460 manual

Page 53

SUMMARY: With UV (under voltage control of the main disconnect) energized, the MLS-460 main switch may be turned on.

•STATE 2 - The tumbler (basket) temperature has risen “ABOVE” SHLC (Sprinkler High Limit Controller) preset trip value. With power applied to the SHLC:

•SHLC set point will open

•SHLC alarm will close

•#2CR (#2 control relay) will become energized

•S11 will be energized (sprinkler valve open)

•L4 (light #4) will be energized (sprinkler valve open)

•SP2 will activate alarm horn.

•#2CR “B” will open.

•SHLC alarm relay will toggle, causing the alarm contact to close and activate 2CR’s (control relay’s) coil. This action will;

•Open 2CR “B” causing UV, the “under voltage” trip feature of the MLS-460’s main disconnect to shut down the “MAIN POWER” to the dryer.

•Latch 2CR “A” “ON” to eliminate any automatic reset of the sprinkler solenoid

•Energize the “SPRINKLER ON” air solenoid

•Illuminate the “SPRINKLER RESET BUTTON”

•Sound sprinkler alarm horn

NOTE: The sprinkler circuit will not reset until the MLS-460’s temperature is below the sprinkler hi- limit controller setting.

•STATE 3 - The tumbler (basket) temperature is still “ABOVE” SHLC (Sprinkler High Limit Controller) preset value and PB #10 (push button #10) “Sprinkler Reset” has been pushed and held “IN.” With power still applied to the SHLC:

•#3CR will energize

•S12 will energize

•#3CR “A” will open

•#2CR will de-energize

•L4 will go off

•SP2 will go off

SUMMARY: #3CR’s (#3 control relay’s) coil will energize causing:

•3CR “A” will open and remove power from 2CR, S11, L4 and SP2

•S12 “sprinkler off” air solenoid will activate turning off the actuated sprinkler valve

IMPORTANT: If the tumbler (basket) temperature is still “ABOVE” SHLC (Sprinkler High Limit Controller) preset value, and the “SPRINKLER RESET” button is released the water valve will open again. (Refer to STATE 2 above.) If the tumbler (basket) temperature is “BELOW” the SHLC preset value when the “SPRINKLER RESET” button is released, the water valve will remain closed. (Refer to STATE 1 on page 48.)

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Contents MLS-460 Installation/Operator’s Manual Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Contents Motors ServicePower Malfunctions Important Information SectionExplosion could Result Safety PrecautionsPage Specifications SPECIFICATIONS/DIMENSIONSDimensions Reattach The Control Pendant Arm Installation ProceduresReassembly of Dryer Reassembly Instructions For Dryers Shipped In Three 3 Pieces Page Location Requirements Air Front Tilt Piston and Sprinkler Lines Internal AIR, ELECTRICAL, and Water ConnectionsPage Electric Tumbler Basket Motors Temperature Probe, Base, and Tumbler Basket DisconnectsPage Pendant Left Drum Motor Tumbler Basket Junction Box DisconnectExternal Supply Connections Condensate return line must be 1-1/4 pipe Exhaust Ducting Page Latest Edition Electrical RequirementsElectrical Requirements MLS-460 Steam Electrical Service SpecificationsPage Fresh AIR Supply Requirements Steam Requirements Steam InformationShut Down Instructions Preparation for Operation PRE START-UPCleaning Routine MaintenanceSuggested Cleaning Schedule Clean any lint accumulation from inside the heat consoleMonthly Tumbler Basket Support and Drive System Component System DescriptionsPage Page Main AIR Blower and Heat Reclaimer System Heat Reclaimer Adjustment Remove Electricity from the Unit Compressed AIR System Page Safety Devices Door Open Parts SERVICE/PARTS InformationService Returning Warranty Cards Warranty InformationWarranty Returning Warranty PartsPage Troubleshooting Table of Contents Number TroubleshootingMain Disconnect Will Not Turn On Power MalfunctionsVerify red Sprinkler Power on main panel to be illuminated If NO, refer to paragraph #1 above Sprinkler circuit may be defective Machine Main Power Shuts Down Blue Indicator OffSprinkler Circuit Components 3CR CRB Not UsedSprinkler Circuit Description Page Malfunctioning PLC Programmable Logic Controller Emergency Stop E-Stop Buttons 1, 2,Page General Description PLC Message HI-TEMP FaultPage Page Introduction Tumbler Basket Section Electrical MalfunctionsDrum Rotation Sensor PRS1 Rear Panel Control Problems Emergency Stop E-Stop Function If YES, refer to a If NO, refer to b PLC OUT PIN 1 = Drum Reverse PLC OUT PIN 2 = Drum Forward PLC OUT PIN 7 = Unload Door Open PLC OUT PIN 10 = Front UP DS1-B=LOAD Door Switch DS2-B=UNLOAD Door Switch Wiring Back the PLC Programmable Logic ControllerProbable Solutions Base Section Electrical Malfunctions Wiring Back to the PLC Programmable Logic Controller Lint Drawer Proximity SwitchesPage Probable Causes Load Level Unload Tumbler Reverse Tumbler Forward Pendant Control MalfunctionsSEL a = Load SEL B = Unload Tumbler Reverse Pendant --- PB2Tumbler Forward Pendant --- PB1 Wiring Back to PLC Programmable Logic Controller Fuse 4 on Main Electrical Panel Faulty SwitchesMLS-460 Pendant Assembly Diagram Wiring DiagramAnother Emergency Stop E-Stop Button Temperature SensingDisconnect Plug Faulty Switch Wiring Back to TB1 Exhaust RTD Resistive Temperature Device Sens1 Temperature Sensing Component DescriptionsWith the control voltage OFF Motors Circuit Wiring to the Analog Input ModuleVerify current setting Check circuit Check motor Retest LS-460 Idling LS-460 Running ADC113073 1- 01/14/00-15