American Dryer Corp AD-95 service manual HSI Module Gas Models, Gas Burner Assembly

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C. HSI Module (Gas Models

Only)

The HSI system consists of a microprocessor- based control module, along with a hot surface ignitor probe and a flame probe assembly. The hot surface ignitor is a silicon carbide ignitor that upon application of 24VAC will glow bright orange for the inter-purge time period. Upon ignition, the resistance in the flame sensor electrode changes and the information is sent to the HSI module via the sensor probe lead connection to the module. Once the resistance is changed and sensed, the HSI module will sustain the gas flow (provide 24VAC power to the gas valve).

D. Gas Burner Assembly

Gas-heated dryers are equipped with a gas burner assembly consisting of three (3) burner tubes, gas valve, glo bar, flame sensor, sail switch, and hi-limit thermostat. The inlet piping enters through the rear of the dryer on the left-hand side (viewing from the front) and runs to the front of the dryer where the gas valve is located.

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Contents AD-95/ML-95 Retain This Manual In a Safe Place For Future Reference For Your Safety Page Table of Content Troubleshooting Safety Precautions SectionDays CleaningWeekly MonthsLubrication AdjustmentsSeven Days after Installation and every 6 Months Enclosure, Air Supply, and Exhaust Requirements Electrical and Gas RequirementsOperational Service Check Procedure Prior to February 11 Control Panel Microprocessor As of February 11With circuit breaker Reversing Relay Panel With fusesGas Burner Assembly HSI Module Gas ModelsDrive Motor Blower Motor and ImpellerTaperlock Trantorque Drive Shaft Assembly Idler Shaft Assembly Transtorque TaperlockMain Door Switch Basket TumblerSail Switch Gas Models Only Hi-Limit Gas Models OnlyAutomatic Reset Thermostat Lint ScreenLint Drawer Switch Servicing Computer ControlsTo Replace Keyboard Label Assembly HSI Ignitor Flame Sensor Probe Ignition ControlsTo Remove Flame Sensor Probe To Replace Main Burner Orifices To Test and Adjust Gas Water Column PressureTo Replace Gas Valve See burner illustration on To Convert Natural Gas to L.P. Gas To Replace Burner TubesDiscontinue power to the dryer To Replace HSI ModuleTo Adjust Sail Switch Sail Switch Assembly Gas Models OnlyTo Replace Sail Switch To Install New Main Door Glass as of October 24 To Replace Main Door SwitchTo Replace Main Door Assembly Front Panel and Main Door AssembliesAs of October 24 Prior to October 24 To Replace Main Door Hinge Block To Install new Main Door Glass prior of October 24To Replace Front Panel Pulleys To Replace Drive Shaft Pulley To Replace Drive Motor PulleyPage Tumbler Wheel Replacement on IdlerAssembly taper lock models Tumbler Wheel Replacement on IdlerAssembly trantorque models To Replace Blower Shaft PulleyBasket Assembly To Replace Blower Motor PulleyTo Replace Idler Shaft Pillow Block Bearing To Replace Drive Assembly Pillow Block BearingBelt Adjustment Motor to Drive Axle To Replace Impeller Motor Fan Shaft Drive To Replace Drive Motor V-BeltsMotors To Replace Blower Motor V-belts To Replace Front Thruster WheelsRear Access ImpellerTo Replace Lint Screen Lint Screen AssemblyTo Replace Lint Door Switch Dryer will not start, but computer display indictors are on No display on computerComputer will not accept key pad entries Drive motor runs, burner is on, but basket will not turnOverload for impeller fan motor is tripping Burner hi-limit safety thermostat is trippingThermal overload for drive motor is tripping There is excessive vibration coming from the basket Phase 6 OPL System Diagnostics Page E.D. Display Indicators E.D Display Indicator Number AIR AIR JET Output L.E.D. Indicator Optional FAN Blower Output L.E.D. IndicatorFuse Main Fuse Input L.E.D. Indicator Flame bURNER Control Fail Input L.E.D. Indicator E.D. Codes BURNER Control Fail BURNER Safety FailDRUM Safety Fail BURNER Flame FailComputer Logic and Wiring Diagram No Display Condition Drive motor reverses but does not forward, blower motor runs Blower motor does not operate, drive motor runsLint Door Condition Main Door ConditionMicroprocessor Which Must be Reset Manually Technical Information For exampleData Label HOW to USE a Manometer AD-95/ML-95 Tool List ADC450188 1- 01/14/99-25