ADC ML-190, ML-175 Sail Switch Assembly Gas Models Only, Front Panel and Main Door Assemblies

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Reverse procedure for installing new thermostat. Reestablish electrical power to the dryer.

To Replace Lint Compartment

Hi-Heat Protector (225° F [107° C) Thermostat

IMPORTANT: Under no circumstances should heat safety devices be disabled.

Discontinue electrical power to the dryer.

Remove lint drawer. Remove two screws securing lint door and remove lint door.

Locate sensor bracket assembly and the four Hex head screws securing bracket assembly to the tumbler wrapper.

Disconnect sensor bracket harness connector and remove bracket assembly from dryer.

Disconnect the two “orange” wires from the thermostat.

Disassemble thermostat from bracket assembly by removing the two mounting screws, washers, and nuts.

Reverse this procedure for installing a hi-heat protector thermostat.

Reestablish electrical power to the dryer.

NOTE: This is a manual reset thermostat. Before changing the thermostat make sure the reset button is in to determine if the thermostat has failed.

Sail Switch Assembly (Gas Models Only)

To Replace Sail Switch

Disconnect electrical power to the dryer.

Remove the two screws which hold sail switch box cover to sail switch box.

Disconnect the two wires from the switch.

Disassemble sail switch from mounting bracket by removing the two screws securing switch in place.

Reverse this procedure for installing new sail switch. Adjust sail switch as described in the next section.

To Adjust Sail Switch

With the dryer operating at a high temperature setting, pull the sail switch away from the burner. The sail switch should open and extinguish the burner. Let the sail switch damper return to the burner wall. The sail switch should close to restart the burner ignition cycle. If the sail switch circuit does not operate as described, bend the actuator arm of the sail switch accordingly until proper operation is achieved. To check proper “open” position of sail switch, open main door, manually depress main door switch, and start dryer. With the main door open and the dryer operating, the sail switch should be open, and the burner should not come on.

IMPORTANT: Under no circumstances should heat safety devices be disabled.

Front Panel and Main Door Assemblies

To Replace Main Door Switch

Discontinue electrical power to the dryer. Open main door.

Remove the two Phillips head screws holding the main door switch bracket assembly in place.

Remove door switch bracket and disconnect wiring from switch.

Disassemble door switch from bracket by removing the two #6-32 nuts. Remove door switch from bracket.

Reverse this procedure for installing new door switch.

Reestablish electrical power to the dryer.

IMPORTANT: Under no circumstances should the door switch be disabled.

To Replace Main Door Assembly

Remove two Allen head screws holding the top main door hinge block to the front panel.

Remove the main door by lifting up and off of bottom hinge block.

Reverse this procedure for reinstalling new main door assembly.

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American Dryer Corporation

450431 - 3

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Contents ML-175 / ML-190 American Dryer CorporationRetain This Manual in a Safe Place for Future Reference Date of Purchase Model no RESELLER’S Name Serial NumbersTable of Contents Cleaning Routine MaintenanceSafety Precautions Important InformationInstallation Requirements Compressed Air Requirements Operational Service Check ProcedureDescription of Parts Electrical and Gas RequirementsSteam Coil and Damper System Gas Burner AssemblyReversing Relay Panel Steam Coil pH LevelSpeed Reducing Shaft Idler Shaft AssemblyRotational Sensor Assembly Drive ShaftBurner Hi-Limit Gas Models Only Main Door SwitchSail Switch Gas Models Only Tumbler Hi-LimitIntroduction Lint Drawer Switch Computer ControlsLint Drawer Ignition Controls Page To Replace Burner Hi-Limit Thermostat Gas Models Only ThermostatsTo Convert from Natural Gas to L.P. Gas Sail Switch Assembly Gas Models Only Front Panel and Main Door AssembliesTo Replace Front Panel To Install New Main Door GlassPulleys To Replace Drive Shaft PulleysTo Replace Motor Pulley Tumbler AlignmentBearings To Replace Drive/Idler Shaft Pillow Block BearingsTo Replace Rear Tumbler Shaft Support Wheels Rotational Sensor Switch ReplacementTo Replace Speed Reducing Shaft Bearings Motors Basket and SupportBelts To Replace Fan Shaft and/or Fan Shaft Bearings Lint Drawer AssemblyImpellor To Replace Lint ScreenTroubleshooting Burner hi-limit safety thermostat is tripping Phase 6 OPL System DiagnosticsDiagnostic L.E.D. Display Failure Codes Overload for impellor fan motor is trippingD. Display Indicators D. Display Indicator NumberHT1 Heat Output L.E.D. Indicator FAN Blower Output L.E.D. IndicatorAIR AIR JET Output L.E.D. Indicator Optional Fuse Main Fuse Input L.E.D. IndicatorPhase 7 OPL System Diagnostics Motor Plate High and Low Voltage Input / Output Board L.E.D. IndicatorsTechnical Information ExampleData Label Using a ManometerHow To Use a Manometer Tool List450431 ADC Part No 3 06/17/08