American Dryer Corp AD-200 PHASE 7 service manual Heat Section

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SECTION V

COMPONENT DESCRIPTION/REPLACEMENT

A. HEAT SECTION

The AD-200 dryer uses three (3) types of heat sources: natural gas, liquid propane (L.P.) gas, and steam. Natural gas and L.P. gas are not directly replaceable. The gas valves need to be modified to use other than the type of heat specified on the nameplate.

1.ADG-200 (gas) dryers utilize a Direct Spark Ignition (DSI) module to monitor that a flame is established. If for some reason the flame signal is lost, the DSI module will shut off the gas valve and not retry ignition (no try to restart the flame). A spark of approximately 14,000 volts is used to establish a flame. The DSI module will turn the gas valve on and ignitor/flame-probe will spark for 8-seconds attempting a flame. Each time the dryer calls for heat the microprocessor controller (computer) will send a 24 VAC signal through the exhaust hi-limit, sail switch, and oven hi-limit. At that point, the DSI module will try for ignition.

DIRECT SPARK IGNITION (DSI) SYSTEM COMPONENTS/FUNCTIONS

Johnson (DSI) Control Module P/N 128935

ADC (DSI) Control Module P/N 128973

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Contents AD-200 Phase Important Note to Purchaser Retain This Manual In a Safe Place For Future ReferenceFor Your Safety Page Table of Contents Components AD-200 Reference Guide Base Section Explosion could Result SectionStandards Liquids CleaningEmpty the compressed air filter bowl AT 80 PSI 5.51 BarsLubrication Days After Installation and Every 6 Months Thereafter AdjustmentsSpecifications and Dimensions Dimensions Obligation Obligation ENCLOSURE/AIR SUPPLY/EXHAUST Requirements Installation RequirementsElectrical and GAS Requirements Operational Service Check ProcedureDirect Spark Ignition DSI System COMPONENTS/FUNCTIONS Heat SectionVAC Direct Spark Ignition DSI Module 225º F 107º C Thermostat Redundant Gas Valve First Visual Check Troubleshooting Flow Chart Quick ReferenceSecond Visual Check Third Visual Check DSI Ignitor GAP Feeler Gauge Troubleshooting the Direct Spark Ignition DSI SystemPage Page Three Visual Checks First Visual Check Second Visual Check Third Visual Check System Diagnosis Gas Pressure With a FlameContinuously DSI Ignitor/Flame-Probe Assembly AdjustmentsPage Page Direct Spark Ignition DSI 24 VAC Transformer With a Flame Light RED Continuously Page Page Direct Spark Ignition DSI 24 VAC Transformer Discontinue electrical power to the dryer CreateapotentialsafetyhazardOpen ALL gas shut-off valves closed in Step #2 Steam Coil System OperationPage Page Disconnect compressed air supply from the dryer Page Sprinkler System Description Description Of Components Resistive Temperature Device RTDSprinkler System Operation Page Supplies Before Servicing the Dryer HP 2.24 kw Control Relay ReplacementPage Page Tilting System Description Tilting Solenoid Valve Page Page Page Page AIR JET Assembly Page Blower Squirrel Cage Fan Motor Assembly Page Page Important do not Overtighten V-BELTS Important do not Overtighten V-BELTS Page Page Filter Maintenance To remove filter element FILTER/REGULATOR AssemblyOperation Door SystemsManual Doors Automatic Doors Pneumatic Automatic Door Replacement or RemovalPage Page Loosen the cord grip cap that the valve wire go through Control and Electrical System Ladder Diagram Page Drive tumbler and basket Motor Button does not Disable the High Voltage to the DryerPage ºC + ºC + ºK PLC Programmable Logic Controller Page Page Page Discontinue electrical power to the dryer Page Page Page Tumbler Basket System Important do not Overtighten Turnbuckle Reinstall V-belts then tighten turnbuckleImportant do not Overtighten Turnbuckle Page Page Important do not Overtighten Turnbuckle Page Page Page Phase 7 OPL System Diagnostics RSS Rear Sail Switch FAN Contactor Fault The Fan Contactor was not pulledFnol Fan Overload Rbhl Rear Burner High LimitThen the L.E.D. is on Board Input Description Red L.E.DIs OFF Down, then the L.E.D. is onValve is open ON, then the L.E.D. is on 24VM RED L.E.D Control voltage at the spare inputsProgrammable and Defaulted to Front Door Closed Programmable and Defaulted to Front Door OpenProgrammable and Defaulted to Lint Drawer Programmable and Defaulted to Front DownProgrammable and Defaulted to Rear Door Open Programmable and Defaulted to Rear DownProgrammable and Defaulted to Rear Door Closed Programmable and Defaulted to SpareTroubleshooting Drive motor is not operating does not start Impellor fan motor is not operating does not start 105 106 Dryer operates but is taking too long to dry Excessive noise and vibration 109 Procedure for Functional Check Replacement Components 111 ADC450039 1- 04/21/00-25