ADC AD-310 User Manual

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AD-310 Service Manual

American Dryer Corporation

88 Currant Road

Fall River, MA 02720-4781

Telephone: (508) 678-9000 / Fax: (508) 678-9447

e-mail: techsupport@amdry.com

ADC Part No. 450413123098DMG/abe

Retain This Manual In A Safe Place For Future Reference

American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is

properly maintained, it will provide many years of safe, efficient, and trouble-free operation.

ONLY qualified technicians should service this equipment.

OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual included with the dryer.

The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.

We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the right to make changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change or discontinue models.

POUR VOTRE SÉCURITÉ

Ne pas entreposer ni utiliser d’essence ni d’autres vapeurs ou liquides inflammables dans le voisinage de cet appareil ou de yout autre appareil.

Important

For your convenience, log the following information:

DATE OF PURCHASE MODEL NO.

DISTRIBUTORS NAME

Serial Number(s)

AD-310

Replacement parts can be obtained from your distributor or the ADC factory. When ordering replacement parts from the factory, you can FAX your order to ADC at (508) 678-9447 or telephone your orders directly to the ADC Parts Department at (508) 678-9000. Please specify the dryer model number and serial number in addition to the description and part number, so that your order is processed accurately and promptly.

The illustrations on the following pages may not depict your particular dryer exactly. The illustrations are a composite of the various dryer models. Be sure to check the descriptions of the parts thoroughly before ordering.

“IMPORTANT NOTE TO PURCHASER”

Information must be obtained from your local gas supplier on the instructions to be followed if the user smells gas. These instructions must be posted in a prominent location near the dryer.

IMPORTANT

YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational

Safety and Health Administration) STANDARDS.

«Attention: Lor des opérations d’entretien “Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper operation.”

des commandes étiqueter tous fils avant

de les déconnecter. Toute erreur de

câblage peut étre une source de danger et

de panne.»

CAUTION

DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.

WARNING

CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYER(S).

CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERATION.

FOR YOUR SAFETY

DO NOT DRY MOP HEADS IN THE DRYER.

DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.

WARNING

UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices ever be disabled.

WARNING

The dryer must never be operated with any of the back guards, outer tops, or service panels removed. PERSONAL INJURY or FIRE COULD RESULT.

WARNING

DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.

IMPORTANT

PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and/or specified in the installation and operator's manual included with the dryer.

Dryers must not be installed or stored in an area where it will be exposed to water or weather.

The wiring diagram for the dryer is located in the front left electrical control box area.

Table of Contents

AD-310 REFERENCE GUIDE

Tumbler Section ............................................................................................................................. 3

AD-310 REFERENCE GUIDE

Base Section .................................................................................................................................. 4

INTRODUCTION ............................................................................................................................... 5

AD-310 MACHINE OPERATION SUMMARY ......................................................................... 5

AD-310 OPERATOR CONTROLS/INDICATORS ...................................................................... 5

AD-310 MACHINE OPERATION TROUBLESHOOTING INFORMATION ........................... 8

SECTION I

SAFETY PRECAUTIONS ................................................................................................................ 16

SECTION II

ROUTINE MAINTENANCE ........................................................................................................... 18

A. Cleaning ................................................................................................................................... 18

B. Lubrication ................................................................................................................................20

C. Adjustments .............................................................................................................................. 21

SECTION III

SPECIFICATIONS and DIMENSIONS .......................................................................................... 22

A. Specifications (Gas and Steam Models) ..................................................................................... 22

B. Dimensions ............................................................................................................................... 23

SECTION IV

INSTALLATION REQUIREMENTS ............................................................................................. 27

A. Enclosure/Air Supply/Exhaust Requirements .............................................................................. 27

B. Electrical and Gas Requirements ................................................................................................ 28

SECTION V

COMPONENT DESCRIPTION/REPLACEMENT ....................................................................... 29

A. Heat Section ............................................................................................................................. 29

B. Troubleshooting The Direct Spark Ignition (DSI) System ............................................................ 33

C. Natural Gas and L.P. (Liquid Propane) Gas Conversion Instructions .......................................... 45

D. Steam Coil System Operation ................................................................................................... 47

E. Sprinkler System Description ..................................................................................................... 52

F. Tilting System Description .......................................................................................................... 58

G. Air Jet Assembly ........................................................................................................................ 65

H. Blower (Squirrel Cage Fan) Motor Assembly ............................................................................. 67

I. Filter and Regulator Assembly ................................................................................................... 74

J. Door Systems ............................................................................................................................ 75

K. Control and Electrical System .................................................................................................... 82

L. Tumbler (Basket) System........................................................................................................... 96

SECTION VI

TROUBLESHOOTING .................................................................................................................. 105

SECTION VII PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT

COMPONENTS .............................................................................................................................. 113

AD-310 Reference Guide

(Tumbler Section)

AD-310 Reference Guide

(Base Section)

INTRODUCTION

AD-310 MACHINE OPERATIONAL SUMMARY

The model AD-310 incorporates one (1) “EMERGENCY STOP (E-Stop) BUTTON” located centrally on the Right Front Control Door. This "RED" MUSHROOM PUSH-BUTTON is “PUSH TO STOP” the machine and “TURN TO RELEASE” or “PULL TO RELEASE” type control device. This button must be in the released mode to power the machine. The PHASE 5 MICROPROCESSOR CONTROLLER (Computer) display will light when the “EMERGENCY STOP (E-Stop) BUTTON” is in the released mode. To turn “ON” the control voltage, press the green “ON” push-button located on the Right Front Control Door.

The dryer has two (2) electronic controllers:

PHASE 5

MICRO-1 PLC (Programmable Logic Controller) - for loading, unloading auto doors, and burner status

The Phase 5 Microprocessor Controller (computer) only response to keypad (touchpad) commands when the tumbler section is level with the loading doors and lint drawer/basket door closed. Likewise, the Micro-1 PLC (Programmable Logic Controller) responses to load or unload selections when the dryer

MICROPROCESSOR CONTROLLER (Computer) - for drying material

monitoring

is not drying material.

AD-310 OPERATOR CONTROLS/INDICATORS

The Right Front Control Door incorporates the following operator controls/indicators:

EMERGENCY STOP (E-Stop) BUTTON (Push To Stop/Turn or Pull To Release)

JOG (Forward/Reverse Push-Buttons)

UNLOAD/DRY / LOAD (Selector Switch)

TILT FUNCTION (Off - On Selector Switch)

HEATER FAULT (Indicator/Reset Push-Button)

CONTROL POWER (Indicator/Control Power On Push-Button)

CONTROL POWER (Off Push-Button)

EMERGENCY (E-Stop) STOP BUTTON (Push To Stop/Turn To Release or Pull To Release)

This "red" mushroom push-button, located in the center of the Right Front Control Door almost directly under the Phase 5 Microprocessor Controller (computer) is a “Push To Stop” and “Turn To Release” type pushbutton. This button must be in the released mode to power the machine (enable the machine to run).

JOG (Forward/Reverse Push-Buttons)

These two (2) push-buttons, located towards the left side of the Right Front Control Door, are for either loading or unloading the tumbler. “JOG” functions are only enabled when the tumbler section is in a tilted position.

NOTE: There is a PLC (Programmable Logic Controller) controlled “DWELL TIME” between forward

jog or reverse jog selection to prevent plug starting the tumbler drive motor.

LOAD / DRY / UNLOAD (Three [3] Position Selector Switch) TILT (Off - On) (Two [2] Position Selector Switch)

The “LOAD / DRY / UNLOAD” and “TILT (Off - On)” selector switches work in conjunction with each other. If the “TILT” selector is in the “OFF” position, an “UNLOAD" or “LOAD” selection will open the front horizontal doors, allowing an operator to load or unload the tumbler in the level position.

NOTE: The “JOG” feature will respond in the level position. The Lint Drawer must be closed for the

“JOG” feature to operate.

If the “TILT” selector is in the “ON” position, an “UNLOAD” selection will open the front vertical doors and tilt the tumbler section towards the front (Rear Up). Likewise, a “LOAD” selection will the front horizontal doors and tilt the tumbler section towards the rear (Front Up).

The “DRY” selection will bring the tumbler section to a level position and close the front horizontal doors. Once ALL safe conditions are met (i.e., front doors closed, lint drawer closed, machine level), an operator will be able to select a drying cycle on the Phase 5 Microprocessor Controller’s (computer) keypad (touchpad), located on the Right Front Control Door. Refer to the Phase 5 Operator’s manual for details.

HEATER FAULT (Indicator/Reset Button) for GAS MODELS ONLY

During a drying cycle the PLC (Programmable Logic Controller) monitors the status of the Phase 5 Microprocessor Controller’s (computer) “Heat On/Off” signal, the control status of the front and rear gas valves, and the state of both the front and rear burner air flow switches. If a fault is sensed, the "HEATER FAULT" indicator and “END OF CYCLE" indicator will begin to flash at a rate of one (1) per second. Both indicators will flash until the operator presses the “HEATER FAULT" reset push-button. For more details on “HEATER FAULT” refer to the operation section in this manual.

CONTROL POWER (On)

This "GREEN LIGHTED OPERATOR," located on the Right Front Control Door, is for enabling the dryer’s control voltage. This push-button must be “ON” for drying or load/unload function to occur.

CONTROL POWER (Off)

This "RED LIGHTED OPERATOR," located on the Right Front Control Door, is for disabling the dryer’s output control voltage. This push-button is mainly for use as a troubleshooting function.

END OF CYCLE / HEATER FAULT INDICATOR / AIR JET

This amber colored indicator located on the front/top of the dryer has two (2) functions:

1. To indicate that a drying cycle has been completed and that the dried material is ready for attention. Once the dryer is attended (i.e., lint drawer is opened, or the “UNLOAD - DRY- LOAD” selector is turned to either the “UNLOAD” or “LOAD” position and the vertical doors open) the indicator will go off.

2. To indicate that a “HEATER FAULT” has occurred.

Note that during a “HEATER FAULT” this indicator will flash in conjunction with the “HEATER FAULT" indicator/reset push-button” located on the Right Front Control Door. Refer to the “HEATER FAULT" Indicator/Reset Push-Button explanation on the previous page (page 6), for more information concerning “HEATER FAULTS.”

3. The Air Jet will be activated at the end of the drying cycle when the “END OF CYCLE “light has been energized. The Air Jet will remain active for approximately thirty (30) seconds to remove lint which may have accumulated on the Blower Wheel (squirrel cage).

AD-310 MACHINE OPERATION TROUBLESHOOTING INFORMATION

END OF CYCLE/HEATER FAULT INDICATOR

The “END OF CYCLE” light located on the top/front of the dryer, is triggered by the Air Jet Signal of the Phase 5 Microprocessor Controller (computer) to the input of the PLC (Programmable Logic Controller). If this

is not sensed by the PLC the light will not turn on. The “1-second flashing” is accomplished by a “Flasher

signal Module” located on the Main Control Panel in the Right Front Control Cabinet. Refer to the electrical blueprints included with this machine for detailed signal routing.

The “HEATER FAULT” signal is an output of the PLC (Programmable Logic Controller) to the “END OF CYCLE” light. A “HEATER FAULT” is an indication that a malfunction has occurred in the “Gas Heat Circuit” and needs attention. Refer to the “HEATER FAULT” explanations on tion on this subject.

If this “END OF CYCLE" light fails to display at the end of every cycle;

1. Check the bulb.

2. Check voltage to the bulb (24 VAC).

page 10 and page 11 for more informa-

3. Refer to the ladder diagram and the schematics provided with this machine for detailed signal information for higher level troubleshooting.

JOG (Forward / Reverse Push-Button)

Forward “JOG” is in the clockwise (CW) direction and Reverse “JOG” is in the counterclockwise (CCW) direction.

There is a seven (7) second dwell (delay) time between a selection of a different rotation direction. This delay is to prevent plug starting the tumbler drive motor.

If the “JOG” function does not operate in the tilted position;

1. Check that the Main Doors are fully opened.

2. Check that the Overload for the Drive Motor is in the “Start” position.

3. Check that the Overload for the Tumbler Motor is in the “Start” position.

4. Check that the Lint Drawer is closed.

5. Refer to the ladder diagram and the schematics provided with this machine for detailed signal information for higher level troubleshooting.

AIR JET

If this selection does not operate;

1. Check the air supply to the dryer (set at 80 PSI).

2. Check to see that the Air Jet L.E.D. (light emitting diode) is on at the end of the drying cycle. If the L.E.D.

is not on it may be an indication of a failed Phase 5 Microprocessor Controller (computer).

3. If Air Jet L.E.D. is on then check the wiring from the Phase 5 Microprocessor Controller (computer) to the air valve.

4. Bad air valve.

LOAD / DRY / UNLOAD (Selector Switch) and TILT FUNCTION (Off - On Selector Switch)

As mentioned in the machine summary (refer to page 6), the “LOAD / DRY / UNLOAD” selector switch and “TILT Off - On” selector switch work in conjunction with each other.

UNLOAD or LOAD LEVEL...opens the Vertical Doors ONLY

If this selection does not operate;

1. Check that 80 PSI of compressed air is supplied to the machine and that the door solenoid is being actuated. The “Door Open” signal is generated by the PLC (Programmable Logic Controller). Refer to the PLC information included in the ladder diagrams and schematics supplied with the machine.

UNLOAD TILTED

This selection causes the front horizontal doors to open. Once the “Door Open” signal is sensed, the PLC enables the “Rear Up” solenoid to tilt the machine. Once the tumbler section releases the tilt switch, the “JOG” functions become enabled for an operator’s selection.

If the tumbler section does not tilt forward;

1. Verify that a “Door Open” signal is being sensed by the PLC (Programmable Logic Controller).

2. Check that 80 PSI of compressed air is supplied to the machine and that the “Rear Up” solenoid is being actuated by the PLC (Programmable Logic Controller).

Refer to the PLC (Programmable Logic Controller) signal information included in the ladder diagrams and schematics supplied with the machine.

LOAD TILTED

This selection causes the front horizontal doors to open. Once the “Door Open” signal is sensed, the PLC (Programmable Logic Controller). enables the “Front Up” solenoid to tilt the machine. The “JOG” functions then becomes enabled for an operator’s selection.

If the tumbler section does not tilt towards the rear;

1. Verify that a “Door Open” signal is being sensed by the PLC (Programmable Logic Controller).

2. Check that 80 PSI of compressed air is supplied to the machine and that the “Front Up” solenoid is being actuated by the PLC (Programmable Logic Controller).

Refer to the PLC (Programmable Logic Controller) signal information included in the ladder diagrams and schematics supplied with the machine.

DRY

This selection prepares the machine for a “Material Drying Command” from the Phase 5 Microprocessor Controller (computer).

NOTE: Before a drying cycle can be selected, the tumbler section must be in the level position and

both the Front Horizontal Doors as well as the Lint Drawer must be closed.

The PLC (Programmable Logic Controller) senses that the machine is level by the two (2) level switches located on the left side of the base section. One (1) switch is towards the rear of the machine and the other switch is towards the front of the machine.

The PLC (Programmable Logic Controller) senses that the vertical doors are closed by the two (2) proximity switches located at the top center, of the dryer above the doors. These switches are magnetically actuated by magnets located on the doors.

The PLC (Programmable Logic Controller) senses the Lint Drawer by a push type switch located on the right side of the lint drawer door.

IMPORTANT: THE LINT DRAWER and LINT DRAWER GUARD MUST BE CLOSED

BEFORE BRINGING THE MACHINE TO A LEVEL POSITION.

If the tumbler section does not return to a level position;

1. Verify that a “Door Closed” signal is being sensed by the PLC (Programmable Logic Controller).

2. Check that 80 PSI of compressed air is supplied to the machine and that the “Front Down” or “Rear Down” solenoid is being actuated by the PLC (Programmable Logic Controller).

3. Verify that the Lint Drawer and Lint Drawer Guard is in the closed position. This signal can be easily verified since it is a PLC (Programmable Logic Controller) input.

Refer to the PLC (Programmable Logic Controller) signal information included in the ladder diagrams and schematics supplied with the machine.

HEATER FAULT (Indicator/Reset Push-Button) for GAS MODELS ONLY

“HEATER FAULT” refers to a problem in the Gas Heating portion of the machine.

The PLC (Programmable Logic Controller) monitors the Phase 5 Microprocessor Controller’s (computer’s) Heat Off/On signals to the two (2) individual gas valves that supply the two (2) separate burners.

When a “HEATER FAULT” occurs within the first twenty-five (25) seconds of the drying cycle, the dryer will go to a “FILL” message on the Phase 5 Microprocessor Controller’s (computer’s) display and both the “HEATER FAULT"

reset push-button and the “END OF CYCLE" light will flash.

When a “HEATER FAULT” occurs after the first twenty-five (25) seconds of the drying cycle, a “CLEAR/ STOP” will be sent to the Phase 5 Microprocessor Controller (computer), a “FILL” message will be displayed on the Phase 5 Microprocessor Controller’s (computer’s) display, and both the “HEATER FAULT”

reset push-

button and the “END OF CYCLE" light will flash.

NOTE: If the “HEATER FAULT Reset Push-Button” is pressed any time during the PLC

(Programmable Logic Controller) controlled cool down cycle, the machine will come to a stop since the machine is being attended to by a qualified operator.

“HEATER FAULT” occurs during the following conditions:

Front and/or rear or both air flow switches are in the closed position at the start of a drying cycle.

IMPORTANT: At the start of a drying cycle, the tumbler will begin to turn and a few seconds there-

after, the “FAN “ signal will be asserted.

IF BOTH AIR FLOW SWITCHES ARE NOT OPEN AT THIS TIME THE BLOWER WILL NOT START and A “HEATER FAULT” WILL OCCUR.

Both HEATER FAULT Indicators” will flash and the machine will come to a complete halt/stop until the “HEATER FAULT" reset push-button is pressed.

ONE or BOTH BURNERS DO NOT IGNITE

The dryer has two (2) burner boxes. Each burner box has its own Gas Valve, Spark Ignitor/Flame-Probe Assembly, and DSI (Direct Spark Ignition) Module.

DSI (Direct Spark Ignition) Module

When the dryer calls for heat, and ALL dryer safety switches are satisfied, a 24 VAC control signal is supplied to both DSI (Direct Spark Ignition) Modules. The DSI Module L.E.D. (light emitting diode) indicators will light “red” for approximately 1.5-seconds of pre-purge, the L.E.D. indicators will light “green”. Each DSI Module will energize its’ respective gas valve and provide an 8-second spark to its’ Spark Ignitor/Flame-Probe Assembly. The gas in both burner boxes should ignite. If ignition does not occur in one or both burners after 8-seconds, the flame will not be sensed by the Spark Ignitor/Flame-Probe Assembly and the DSI Module will go into the “LOCK-OUT” mode lighting the L.E.D. (light emitting diode) indicator(s) “red” continuously. THERE ARE NO IGNITION RETRIES BY THE DSI MODULE. Stop the dryer at this point and restart another drying cycle. It may take several restarts to clear the gas supply piping of air.

NOTE: “HEATER FAULT” will occur during the initial set up of the machine, indicating that the burners

are not lighting due to air in the gas line.

GAS PRESSURE

The natural gas pressure supplied to the dryer must be between 6-inches and 12-inches of W.C. (water column) pressure. If the supply pressure is above 12-inches water column than an external regulator must be installed to reduce the gas supply pressure to between 6-inches and 12-inches of water column.

Once the flame has been established in both burner boxes, the natural gas outlet manifold pressure measured at each gas valve pressure tap must be 3-1/2 inches W.C. (water column) pressure. Connect a water tube manometer to the 1/8” F.P.T. gas pressure tap on the downstream side of each gas valve. There is a pressure regulator in both gas valves so the manifold pressure can be adjusted to 3-1/2” water column (W.C.). Unscrew the slotted regulator cover which is located on the top of each gas valve, and turn the regulator adjustment screw located underneath the cover (clockwise [CW] to increase manifold pressure and counterclockwise [CCW] to decrease manifold pressure).

MAN2633

The L.P. (liquid propane) gas pressure measured at each gas valve pressure tap must be 11-inches water column (W.C.) pressure, when the flame is established in both burner boxes. There is no means to adjust this pressure supplied with the dryer so the downstream L.P. pressure regulator must be adjusted to provide the 11inch water column (W.C.) outlet manifold pressure. Connect a water tube manometer to the 1/8” F.P.T. gas pressure tap on the downstream side of each gas valve to measure the manifold pressure.

IMPORTANT INFORMATION

Once the Blower Motor starts, both the FRONT AIR FLOW SWITCH and the REAR AIR FLOW SWITCH must pull in to indicate that there is sufficient air flow through the machine for safe ignition of both the Front Burner and the Rear Burner.

Refer to the system ladder diagram for “HEAT” signal information. There are several safety devices that must be satisfied prior to ignition. Any one of these safety devices can cause NO IGNITION, therefore a “HEAT FAULT”...i.e., FRONT AIR FLOW SWITCH

REAR AIR FLOW SWITCH EXHAUST HI-LIMIT SWITCH FRONT BURNER INTAKE HI-LIMIT SWITCH REAR BURNER INTAKE HI-LIMIT SWITCH DEFECTIVE ELECTRICAL HEAT CIRCUIT

ONE (1) BURNER WILL NOT IGNITE AT THE BEGINNING OF A CYCLE

This condition can be caused by the following:

• DEFECTIVE DSI (Direct Spark Ignition) MODULE

• DEFECTIVE SPARK IGNITOR/FLAME-PROBE ASSEMBLY

• DEFECTIVE GAS VALVE

• INSUFFICIENT GAS PRESSURE

• DEFECTIVE ELECTRICAL HEAT CIRCUIT

Refer to the ladder diagram and the schematics provided with this machine for reference to the above listed information.

ONE (1) BURNER WILL NOT IGNITE DURING A DRYING CYCLE

This condition can be caused by the following:

• DEFECTIVE DSI (Direct Spark Ignition) MODULE

• DEFECTIVE SPARK IGNITOR/FLAME-PROBE ASSEMBLY

• DEFECTIVE GAS VALVE

• DEFECTIVE ELECTRICAL HEAT CIRCUIT

• LOSS OF GAS PRESSURE

Refer to the ladder diagram and the schematics provided with this machine for reference to the above listed information.

CONTROL POWER (Indicator/Control Power On Push-Button)

This “GREEN LIGHTED” push-button is for enabling the 24 VAC control voltage to the control circuits of the machine. This push-button indicator must be “ON” for the system to load or dry material.

Refer to the ladder diagram included with the dryer for the function of this push-button in the 24 VAC control voltage latching control circuit.

CONTROL POWER (Off Push-Button)

This “RED NON-LIGHTED” push-button is for disabling the 24 VAC control voltage to the control circuits of the machine.

Refer to the ladder diagram included with the dryer for the function of this push-button in the 24 VAC control voltage latching control circuit.

SYSTEM LADDER DIAGRAM

The SYSTEM LADDER DIAGRAM is an overview on the electrical connections of the dryer. This diagram is for signal flow information and is a tool to direct an individual in the correct direction for troubleshooting this machine.

The dryer system is divided into a number of “electrical” sections which are as follows:

1. Right Front Control Panel

The RIGHT FRONT CONTROL PANEL is located in the Right Front Control Cabinet of the dryer. This panel is the heart of the drying system, where ALL control signals interface to or from this panel. The signals that interface to this panel are too many to list here, however, they are schematic diagram.

2. Right Base Electrical Enclosure

The RIGHT BASE ELECTRICAL ENCLOSURE is located towards the front of the right base section. An industrial multi-pin connector is used to connect the base section control signals to the tumbler section’s main control panel. This electrical enclosure is labeled CAUTION, HIGH VOLTAGE IS PRESENT IN THIS ENCLOSURE and incorporates the following electrical devices:

• The MAIN ELECTRICAL POWER to the machine

• The ELECTRICAL CONNECTION for the “OPTIONAL” SPRINKLER CIRCUIT POWER

• The THERMAL/MAGNETIC OVERLOAD and REVERSING CONTACTOR for the TUMBLER

MOTOR

ALL identified on TB1 of its’

• The THERMAL/MAGNETIC OVERLOAD and REVERSING CONTACTOR for the BLOWER

MOTOR

3. Right Base Interface Junction Box

The RIGHT BASE INTERFACE JUNCTION BOX is located towards the rear of the right base section and is used as a central location to interface the base section electrical components to the TILTING tumbler section. An industrial multi-pin connector is used to connect the base section control signals to the tumbler section’s main control panel. The control signals incorporated in the Right Base Interface Junction Box are:

SOLENOID CONTROL

• Front Up / Front Down

• Rear Up / Rear Down

• Open Front Door

• Supply Air Enable

• Air Jet

LINT DRAWER / GUARD STATUS

TUMBLER TEMPERATURE and HI-LIMIT INFORMATION

TUMBLER LEVEL SENSE

• Front Level Switch

• Rear Level Switch

OPTIONAL SPRINKLER CONTROL SIGNALS

4. Optional Sprinkler Circuit

The OPTIONAL SPRINKLER CIRCUIT main control panel will be located in the left front electrical enclosure. If a SPRINKLER OPTION is included with the dryer, this panel will include an “AUTOMATIC EMERGENCY STOP” feature. This feature requires that the Sprinkler Circuit be functional for the dryer to be powered.

NOTE: There will be a dedicated electrical connection in the Right Electrical Junction Box for the

Sprinkler Circuit.

SECTION I

SAFETY PRECAUTIONS

CAUTION: The dryer should never be left unattended while in operation.

WARNING: For your safety, the information in this manual must be followed to minimize the risk of

fire or explosion or to prevent property damage, personal injury, or loss of life.

WARNING: The dryer must never be operated with any of the back guards, outer tops, or

service panels removed. PERSONAL INJURY or FIRE COULD RESULT.

1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other

appliance.

2. Purchaser/user should consult the local gas supplier for proper instructions to be followed in the event the

user smells gas. The instructions should be posted in a prominent location.

3. WHAT TO DO IF YOU SMELL GAS...

a. DO NOT try to light any appliance.

b. DO NOT touch any electrical switch.

c. DO NOT use any phone in your building.

d. Clear the room, building, or area of

e. IMMEDIATELY call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.

f. If you cannot reach your gas supplier, call the fire department.

4. Installation and service must be performed by a qualified installer, service agency, or gas supplier.

5. Dryer(s) must be exhausted to the outdoors.

6. Although ADC produces a very versatile machine, there are some articles that, due to fabric composition or

cleaning method, should not be dried in it.

WARNING: Dry only water-washed fabrics. DO NOT dry articles spotted or washed in dry cleaning

solvents, a combustible detergent, or "all purpose" cleaner.

EXPLOSION COULD RESULT.

ALL occupants.

WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,

or wax.

EXPLOSION COULD RESULT.

WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvent will create a fire

hazard.

WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or

similarly textured rubberlike materials. Drying in a heated basket (tumbler) may damage plastics or rubber and also may be a fire hazard.

7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct work, and area around the back of the dryer. The frequency of inspection and cleaning can best be determined from experience at each location.

WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire

hazard.

8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the NATIONAL ELECTRIC CODE ANSI/NFPA NO. 70-LATEST EDITION.

NOTE: Failure to do so will VOID THE WARRANTY.

9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety circuit, ever be disabled.

WARNING: PERSONAL INJURY or FIRE COULD RESULT.

10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.

11. Remove articles from the dryer as soon as the drying cycle has been completed.

WARNING: Articles left in the dryer after the drying and cooling cycles have been completed can

create a fire hazard.

12. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.

IMPORTANT: Label ALL wires prior to disconnection when servicing the microprocessor controller

(computer) and the ignition module. WIRING ERRORS CAN CAUSE

IMPROPER and DANGEROUS OPERATION.

IMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and

THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) STANDARDS.

SECTION II

ROUTINE MAINTENANCE

A. CLEANING

A schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the duct work system. The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper air circulation. The accumulation of lint can restrict this air flow. If the guidelines in this section are met, an ADC dryer will provide many years of efficient, trouble-free, and - most importantly - safe operation.

WARNING: LINT FROM MOST FABRICS IS HIGHLY COMBUSTIBLE. THE

ACCUMULATION OF LINT CAN CREATE A POTENTIAL FIRE HAZARD.

WARNING: KEEP DRYER AREA CLEAR AND FREE FROM COMBUSTIBLE

MATERIALS, GASOLINE, and OTHER FLAMMABLE VAPORS and LIQUIDS.

NOTE: REMOVE POWER FROM THE MACHINE BEFORE PERFORMING ANY

MAINTENANCE IN THE MACHINE.

NOTE: Suggested time intervals shown are for average usage which is considered six (6) to eight (8)

operational (running) hours per day.

SUGGESTED CLEANING SCHEDULE

EVERY THIRD or FOURTH LOAD

Clean the lint screen. A clogged lint screen will cause poor dryer performance. The lint screen is located in the lint drawer in the base of the dryer. Pull out the lint drawer, brush the lint off the lint screen, and remove the lint. Inspect the lint screen and replace if torn.

NOTE: The frequency of cleaning the lint screens can best be determined from experience at each

location.

WEEKLY

Open the hinged panels on each side of the tumbler section and remove any lint accumulation from the tumbler drive motor, drive shafts, gear reducer, drive belts, drive wheels, and drive shaft bearings.

Slide the lint basket all the way out of the dryer and clean any lint accumulation off of the temperature sensor bracket, which is located above the lint basket.

WARNING: TO AVOID THE HAZARD OF ELECTRICAL SHOCK, DISCONTINUE

ELECTRICAL SUPPLY TO THE DRYER.

MONTHLY

Empty the compressed air filter bowl.

Clean any lint accumulation from the gas valve and burner area at the top of the dryer, the fan (impellor/ blower) motor, and the fan (impellor) bearings located in the dryer base.

EVERY 6 MONTHS

STEAM MODELS - clean the steam coil fins. We suggest using compressed air and a vacuum cleaner with

brush attachment.

NOTE: When cleaning steam coil fins, be careful not to bend the fins. If fins are bent, straighten by

using a fin comb, which is available from any local air conditioning supply house.

Inspect and remove any lint accumulation in customer furnished exhaust duct work system and from the dryers internal exhaust ducting.

NOTE: THE ACCUMULATION OF LINT IN THE EXHAUST DUCT WORK CAN

CREATE A POTENTIAL FIRE HAZARD.

NOTE: DO NOT OBSTRUCT THE FLOW OF COMBUSTION and VENTILATION AIR.

CHECK CUSTOMER FURNISHED BACK DRAFT DAMPERS IN THE EXHAUST DUCT WORK. INSPECT and REMOVE ANY LINT ACCUMULATION WHICH CAN CAUSE THE DAMPER TO BIND or STICK.

NOTE: When cleaning the dryer cabinet(s), avoid using harsh abrasives. A product intended for the

cleaning of appliances is recommended.

Clean off any lint accumulation on top of the temperature probe and the hi-limit switch located above the lint basket.

B. LUBRICATION

MONTHLY

Check compressed air filter bowl for water. Empty by pressing the rubber petcock to the side. Additionally, check lubricator bowl for oil. If empty, remove the fill plug and add oil. ( misting oil.) Replace the fill plug.

Use petroleum based 10/150 SSU

NOTE: LUBRICATOR SHOULD BE SET AT 1 DROP PER CYCLE.

NOTE: REGULATOR PRESSURE IS TO BE SET AT 80 PSI.

Apply high temperature grease to the four (4) 1-1/2" diameter tumbler drive shaft pillow block bearings and the two (2) 1-3/8" diameter blower shaft pillow block bearings. (Use Shell Alvania #3 grease or equivalent.)

MAN3203

Apply grease (

use Shell Alvania #3 grease or equivalent) to the tilting hinges (on 1-Way Tilt Models Only).

EVERY 6 MONTHS

Change gear oil in the tumbler shaft gear reducer.

1. Remove the drain plug (located at the bottom rear of the reducer).

2. After oil is completely drained replace the drain plug.

3. Remove the vent plug and pour in SAE 90, or equivalent.

1.4 liters of Mobil Oil DTE HH5G (I.S.O. viscosity grade 460),

C. ADJUSTMENTS

7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER

Inspect bolts, nuts, screws, (bearing set screws), nonpermanent gas connections (i.e., unions, shut-off valves, orifices), and grounding connections. Fan (impellor) V-belts, along with the motor and drive belts should be examined and replaced if necessary. Tighten loose V-belts when necessary. Complete operational check of controls and valves. Complete operational check of ALL safety devices (i.e., door switches, lint drawer switch, sail switch, burner and hi-limit thermostats).

SECTION III

SPECIFICATIONS and DIMENSIONS

A. SPECIFICATIONS (Gas and Steam Models)

AXIMUM CAPACITY (DRY WEIGHT

)310 lbs. 141 kg

ASKET (TUMBLER

RIVE MOTOR

LOWER MOTOR (GAS/STEAM

OOR OPENING

OOR SILL HEIGHT

OMPRESSED AIR

OMPRESSED AIR CONNECTION

OLTAGE AVAILABLE

EAT INPUT

PPROX

IRFLOW

Gas*

) D

IAMETER

) D

EPTH

) V

OLUME

LEVEL

. W

EIGHT (UNCRATED

Inlet Pipe Size 1-1/2"

OLTAGE AVAILABLE

62-1/2" 158.75 cm

60" 152.4 cm

106.5 cu. ft. 3.02 cu.m.

5 HP 3.73 kw

)15 HP/25 HP11.2 kw/18.7 kw

36-3/4" W

IDE

x 43" H

IGH

93.3 cm x 109.2 cm

36-1/2" 92.71 cm

80 PSI 5.63 kg/cu.m.

1/8" F.P.T. .318 cm

208-460v / 3ø / 3, 4w / 50/60 Hz

1,125,000 btu/hr 283,500 kcal/hr

)5,100 lbs. 2,313 kg

6,500 cfm 184 cmm

3.81 cm

208-460v / 3ø / 3, 4w / 50/60 Hz

PPROX

IRFLOW

TEAM COMSUMPTION

1,153 lbs/hr 524 kg/hr 35

Steam*

. W

EIGHT (UNCRATED

PERATING STEAM PRESS URE

)5,600 lbs. 2,540 kg

8,500 cfm 241 cmm

OILER

ORMAL LOAD

TEAM SUPPLY

TEAM RETURN

125 psi max 8.79 kg/sq cm 2" M.P.T. 5.08 cm 2" M.P.T. 5.08 cm

Shaded areas are stated in metric equivalents.

* Dryer mus t be provided with a clean, dry, regulated 80 PSI (+/- 10 psi) air supply (equivalent

volume - 11 cfh [0.3 cmh]).

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or

obligation.

B. DIMENSIONS

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or

obligation.

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or

obligation.

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or obligation.

ADG-310 (Gas)

Non-Tilt

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or

obligation.

SECTION IV

INSTALLATION REQUIREMENTS

Installation should be performed by competent technicians in accordance with local and state codes. In the absence of these codes, installation must conform to applicable AMERICAN NATIONAL STANDARDS:

National Fuel Gas Code ANSI Z223.1-LATEST EDITION

and/or

National Electric Code ANSI/NFPA No. 70-LATEST EDITION

A. ENCLOSURE / AIR SUPPLY / EXHAUST REQUIREMENTS

NOTE: The following information is very brief and general. For detailed descriptions, refer to the

AD-310 Non-Tilting Installation/Operator's Manual (ADC Part No. 112192) or the AD-310 Tilting Installation/Operator's Manual (ADC Part No. 112191).

Bulkheads and partitions around the dryer should be made of noncombustible materials. Allowances should be made for the opening and closing of the control door and lint door. Also, allowances should be made in the rear and sides for ease of maintenance. Refer to appropriate Installation Manual (AD-310 Non-Tilting Installation/Operator's Manual [ADC Part No. 112192] or the AD-310 Tilting Installation/Operator's Manual [ADC Part No. 112191]) for recommended distances and minimum allowances required.

When the dryer is operating, it draws in room air, heats it, passes this air through the basket (tumbler), and exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and sail switch "fluttering" problems on gas dryers may result, and you also could have premature motor failure from overheating. The air supply must be given careful consideration to insure proper performance of each dryer.

IMPORTANT: Make-up air must be provided from a source free of dry cleaning fumes. Make-up

air that is contaminated by dry cleaning fumes will result in irreparable damage to motors and other dryer components.

Exhaust duct work should be designed and installed by a competent technician. Improperly sized duct work will create excessive back pressure which will result in slow drying, increased use of energy, and shutdown of the burner by the airflow (sail) switch, burner hi-limit or lint chamber hi-heat protector thermostat. Refer to appropriate Installation Manual (AD-310 Non-Tilting Installation/Operator's Manual [ADC Part No. 112192] or the AD-310 Tilting Installation/Operator's Manual [ADC Part No. 112191]) for more detail.

CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCT WORK CAN

CREATE A POTENTIAL FIRE HAZARD.

B. ELECTRICAL REQUIREMENTS and GAS REQUIREMENTS

It is your responsibility to have ALL electrical connections made by a properly licensed and competent electrician to assure that the electrical installation is adequate and conforms with local and state regulations or codes. In the absence of such codes, the applicable requirements of the National Electric Code ANSI/NFPA No. 70-LATEST EDITION.

IMPORTANT: Failure to comply with these codes or ordinances and/or the requirements stipulated in

this manual can result in personal injury or component failure.

The dryer installation must meet the AMERICAN NATIONAL STANDARD; National Fuel Gas Code ANSI Z223.1-LATEST EDITION, as well as, local codes and ordinances, and must be done by a qualified technician.

NOTE: Undersized gas piping will result in ignition problems and slow drying and can create a safety

hazard.

The dryer must be connected to the type of gas (natural or L.P.) indicated on the dryer data label. If this information does not agree with the type of gas available, contact the distributor who sold the dryer or contact the factory.

The gas input ratings shown on the dryer data label are for elevations up to 2,000 feet, unless elevation requirements of over 2,000 feet were specified at the time the dryer order was placed with the factory. The adjustment for dryers in the field for elevations over 2,000 feet are made by changing the burner orifices. If this adjustment is necessary, contact the distributor who sold the dryer or contact the factory.

ALL electrical connections, material, and workmanship must conform to

NOTE: Any burner changes must be made by a qualified technician.

C. OPERATIONAL SERVICE CHECK PROCEDURE

After performing any service or maintenance function, an operational check should be performed to insure that ALL components are performing properly.

1. Make a complete operational check of ALL the operating controls to insure that the timing is correct, temperature selection switches are functioning properly.

2. Make a complete operational check of ALL safety related circuits, door switches, hi-limit thermostat, sail switch, cycling thermostats, etc.

SECTION V

COMPONENT DESCRIPTION/REPLACEMENT

A. HEAT SECTION

The AD-310 dryer uses three (3) types of heat sources: natural gas, liquid propane (L.P.) gas, and steam. Natural Gas and L.P. (liquid propane) 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-310 (gas) dryers utilizes 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 (Direct Spark Ignition) 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 SPART IGNITION (DSI) SYSTEM COMPONENTS/FUNCTIONS

a. The Direct Spark Ignition (DSI) Module is a 24 VAC device

designed to be the "controller" of the DSI system. When activated by the dryer controls, this module constantly monitors and controls the functions of the DSI system (i.e., spark activation, gas valve off and on, flame verification, etc.). Additionally , the DSI Module has self diagnostic capabilities.

b. The Ignitor and Flame-Probe Assembly is located in the burner

flame area and is used to ignite the gas by use of a high voltage spark (approximately 14,000 volts) and to provide feedback information to the DSI (Direct Spark Ignition) Module as to whether the burner flame is evident (on).

24 VAC

Direct Spark Ignition (DSI) Module

MAN3485

c. The Burner Hi-Limit Switch is a thermostat type switch located

in the burner. Its function is to discontinue heat (flame) in the event of an over temperature situation (above 330º F). For dryers manufactured as of May 26, 1998, the hi-limit must be manually reset once the device trips.

d. The Sail Switch Verification Assembly is located on the burner ,

downstream of the flame tubes. Its function is to detect whether or not there is sufficient air flow through the dryer. If the Sail Switch

is not in the open position prior to a drying cycle, the

blower circuit will not be activated.

Ignitor/Flame Probe Assembly

MAN3484

330º F Thermostat

Sail Switch Verification Assembly

e. The T umbler Hi-Limit Switch is a thermostat type switch located

above the Lint Basket. Its function is to discontinue heat (flame) in the event of an over temperature situation (above 225º F).

MAN3484

225º F Thermostat

f. The gas valve used in the dryer is of the redundant type which

means that the gas valve is actually two (2) gas valves in one; one in series with the other. This is a safety feature which provides protection against gas flow in the event that one of the valves does not seat properly. The valve also regulates the incoming gas pressure.

NOTE: THE DSI GAS VALVES ARE NOT FIELD

REPAIRABLE.

Redundant Gas Valve

g. Normal Operation of the Direct Spark Ignition (DSI) System (refer to the illustration on page 29).

1) The DSI (Direct Spark Ignition) System consists of a microprocessor-based control module, along with an Ignitor and Flame-Probe Assembly. This control utilizes a high voltage synchronous spark ignitor and a rectified flame sensor probe signal to locally control ALL basic functions in the gas burner.

On a call for heat by the dryers' controls, 24 VAC is applied to the DSI (Direct Spark Ignition) module at which time the DSI modules' L.E.D. (light emitting diode) indicator will light "RED" indicating that power has been established to the DSI module. Almost immediately (up to approximately 1.5-seconds [prepurge]) the indicator will light" GREEN," the gas valve opens and the spark burst will be evident (on) for approximately 8-seconds. The burner flame should now be established/confirmed.

If at this time the flame has not been established and confirmed, the DSI (Direct Spark Ignition) module will "LOCK-OUT" and the DSI modules' L.E.D. (light emitting diode) indicator will light "RED" and stay on continuously . T o reset or cancel the "LOCK-OUT" condition, open and close the main door then restart the dryer.

Once the burner flame is established and confirmed, the DSI (Direct Spark Ignition) module indicator will light "GREEN," and the burner system will continue through a normal heating cycle, where the DSI (Direct Spark Ignition) system will cycle on and off as required by the dryers controls.

During the normal heating cycle, should a "FLAME-OUT" occur (i.e., severe air turbulence forces the flame away from the ignitor and flame-probe assembly), the DSI (Direct Spark Ignition) module shut the gas valve off and immediately try to reestablish the burner flame. The DSI module will attempt to light the burner ONLY ONCE. If flame is not established, the DSI module will "LOCKOUT ." T o reset or cancel the "LOCK-OUT" condition, open and close the main door then restart the dryer.

h. ADC Direct Spark Ignition (DSI) Operation Flow Chart

Computer/Timer Calls For Heat

Power

Applied to the

DSI Module

DSI Module Indicator lights "RED" for up to approximately

1.3 seconds (prepurge).

DSI Module

Internal Check

DSI Module Indicator lights "GREEN", Gas Valve opens and spark bursts for approximately 8 seconds.

Flame

Confirmed?

Yes

DSI Module Indicator light remains "GREEN".

Open and close the Main Door... restart the dryer.

DSI Module "LOCK-OUT" Indicator lights "RED".

Flame

Confirmed?

Yes

Normal Heating Cycle

Established

Flame Lost

DSI Module will immediately attempt to re-light burner.

B. TROUBLESHOOTING THE DIRECT SPARK IGNITION (DSI) SYSTEM

NOTE: The troubleshooting information provided in this manual is intended for use by qualified

service technicians only. OBSERVE

ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the AD-310 Non-Tilting Installation/Operator's Manual (ADC Part No. 112192) or the AD-310 Tilting Installation/Operator's Manual (ADC Part No. 112191) included with the dryer.

IMPORTANT: UNDER NO CIRCUMSTANCES SHOULD ANY SAFETY or HEAT

CIRCUIT DEVICES EVER BE DISABLED.

THE FOLLOWING PIECES OF TEST EQUIPMENT WILL BE REQUIRED TO TROUBLESHOOT

THIS SYSTEM WITH MINIMAL TIME AND EFFORT

DSI IGNITOR GAP FEELER GUAGE (1/8")

USED FOR CHECKINK GAP BETWEEN I GNITOR/FLAME-PROBE

MANOMETER

USED TO M EASURE GAS PRESSURE IN INCHES

OF WATER COLUMN (W.C.)

ASSEMBY AND SPARK ELECTRODE

Available From ADC

MULTIMETER / VOLTMETER

FOR MEASURING VOLTAGE

1. Direct Spark Ignition (DSI) Troubleshooting Terms (definitions)

a. DSI (Direct Spark Ignition) MODULE "RED" L.E.D. (Light Emitting Diode) INDICATOR LIGHT

This "red" L.E.D. (light emitting diode) light is located in the upper right corner of the DSI (Direct Spark Ignition) module (refer to the top illustration on page 30). This is a diagnostic indicator that simplifies the operational and troubleshooting procedures of the DSI system.

b. LOCK-OUT MODE - DSI (Direct Spark Ignition) module "red" L.E.D. (light emitting diode) indicator

light stays on continuously. This indicates there is a system fault and most likely the fault is the DSI module itself.

c. FLAME-OUT - burner flame shut down by the DSI (Direct Spark Ignition) module due to lack of flame

verification. This condition occurs only after ignition is evident but is lost. The DSI system will immediately attempt to relight the burner.

d. RECYCLE - flame has been sensed but lost. Initiate a new sequence (

2. Troubleshooting and System Basic Diagnosis

a. Preliminary Steps

The following steps must be preformed to minimize the time required to isolate cause of fault.

1) DSI (Direct Spark Ignition) module L.E.D. (light emitting diode) indicator light is off (no "red" or "green" light).

a) Check for voltage (approximately 24 VAC) across the

DSI model terminals "TH" and "GND...

If voltage (approximately 24 VAC) is evident, then, there is a malfunction within the DSI module itself, and it must be replaced.

If there is no voltage present, then problem is not the DSI module or the ignition system, the problem elsewhere in the dryer (i.e., dryers' heat circuit [sail switch, hi-limit circuits], etc.).

THERE ARE NO RETRIES).

2) DSI (Direct Spark Ignition) module L.E.D. (light emitting diode) indicator lights "red" for approximately

1.5 seconds (prepurge). This indicates that functioning and power is being supplied to the DSI module.

3) DSI (Direct Spark Ignition) module L.E.D. (light emitting diode) indicator lights "green." This indicates a normal heating cycle. This also indicates that the preliminary diagnostics of the module has confirmed that the DSI module is functional.

4) DSI (Direct Spark Ignition) module L.E.D. (light emitting diode) indicator lights "red" continuously... LOCK-OUT MODE. This indicates that there is a system fault and most likely the fault is internal to the DSI module. To make sure, open and close the main door. Restart the dryer...if the module LOCKS-OUT ("red" L.E.D. indicator light stay on continuously) again, replace the DSI module.

ALL the controls (including ALL the safety circuits) are

If the dryer repeatedly has DSI (Direct Spark Ignition) module "LOCK-OUT" failures, the cause may be due to high voltage not getting into the DSI module ignitor probe assembly.

(1) Check to insure that the red high voltage wire (between the ignitor spark electrode and the

DSI [Direct Spark Ignition] module) is not wrapped around the sensor probe wire (the wire between the DSI module FP terminal and the ignitor and flame-probe assembly). If the wires are touching one another, separate and secure in place AWAY FROM ONE ANOTHER.

(2) Check to insure that the dryer is properly grounded and that the ground connections (GND) to

the DSI (Direct Spark Ignition) module are secure.

(3) If the problem persists, it is most likely to be in the external components (not the DSI [Direct

Spark Ignition] module), or wiring , due to a "FLAME-OUT" ... proceed as follows:

NOTE: Preliminary steps - DO NOT OMIT - to minimize the time required to troubleshoot this

system.

(a) Discontinue the electrical service to the dryer.

(b) Visually check the DSI (Direct Spark Ignition) module components for visual damage.

of the sensor to the burner.

(d) Inspect the DSI (Direct Spark Ignition) ignitor and flame-probe assembly...

...check electrode for visible cracking at the ceramic insulator or shorting of sensor to burner

...check to insure that the flame sensor rod is positioned over the flame area

...check for carbon deposits on the flame sensor rod

...check to insure that there is a 1/8" gap between the ground rod and the ignitor spark electrode

b. After preforming these inspections and making corrections - if any - restore power to the dryer ... start the

dryer and operate through one (1) complete cycle to insure that ALL components are functioning properly. If a no heat condition persists refer to the Troubleshooting Flow Charts on page 37, page 38, and page 39.

1) To effectively use this information or the flow charts, each step must be completed in sequence, performing whatever test are suggested. After the completion of each test, the guide will direct the Service Technician to the next logical step in the troubleshoot sequence based on the outcome of the previous check.

2) Components should be replaced only after each step has been completed and replacements after each step has been completed and replacement is suggested in the flow chart. However, the experienced technician realizes that a loose connection or broken or shorted wire may be at fault where electrical components are concerned... and not necessarily the suspected component itself.

c. Three Visual Checks

1) Does the DSI ignitor/flame-probe assembly start sparking? If not, refer to the FIRST VISUAL CHECK on

2) Does the main burner ignite? If not, refer to the SECOND VISUAL CHECK on

3) Does the main burner remain lit after ignition has been established ("FLAME-OUT")? If not, refer to the THIRD VISUAL CHECK on

page 37.

page 38.

page 39.

d. Troubleshooting Flow Chart - Quick Reference...

First Visual Check

(Does Ignitor Spark?)

Computer/Timer Calls For Heat

s spark evident (on)

at Ignitor Assembly?

Yes

Go To Chart 2

Is 24 Volts

present across DSI Module

terminals

TH and COM?

Yes

Check

High Voltage (HV)

Lead for nicks or cracking,

where sparking to ground may

occur. Is this wire

damaged?

Visually

inspect Spark

Electrode Assembly. Is

ceramic cracked or Spark

Electrode incorrectly

gapped?

Yes

Open circuit to DSI System. Check the 24 VAC power source Sail Switch and Hi-Limit

Repair or replace HV Lead Assembly. Energize system and check for proper operation.

If cracked, replace Electrode Assembly. Correct gap size is 1/8" (+/- 1/32"). Energize system and check for proper operation.

Replace the DSI Module. Energize system and check for proper operation.

Visually

inspect High

Voltage (HV) Wire

connections at both DSI Module

and Ignitor Assembly.

Are connections

secure?

Yes

Remove

High Voltage

(HV) Wire from

DSI Module and visually

inspect. Is conductor

visible at end of

HV Wire?

1. At DSI Ignitor Assembly be sure HV Wire is secure in the boot as well as the connection to the Ignitor

NoYes

Probe Assembly.

2. At DSI Module, center the end of the HV Wire with a Spike Terminal. Energize system and check for proper operation.

Cut the end off of the HV Wire 1/4" at a time until conductor becomes visible and is flush with the insulation. Reconnect the HV Wire to the Spike Terminal on the DSI Module. Energize system and check for proper operation.

e. Troubleshooting Flow Chart - Quick Reference...

Second Visual Check

(Does Main Burner Ignite?)

Does

main burner

light?

Yes Yes

Go To

Third Visual

Check

Restore gas supply. Energize system and check for proper operation.

gas available

at the

source?

Is manual

Turn manual knob on the Gas Valve to the "OFF" position. Connect a manometer to the Gas Valve outlet pressure tap.

knob on the Gas Valve

in the "ON"

position?

dryer Internal Gas

Shut-Off Valve and

ALL

External Gas Shut-Off Valves in the open

position?

Yes

Turn

manual knob on

the Gas Valve to the

"ON" position.

Energize the system.

Is outlet pressure

detected?

Yes

Turn knob to "ON/OPEN" position. Energize system and check for proper operation.

Correct supply pressure. Energize system and check for proper operation

Is outlet Water

Column (W.C.) pressure

correct?

Natural 3.5" - 4.0" W.C.

L.P. 10.5" - 11.0" W.C .

Yes

Energize

system. Is 24 VAC

present across leads

at the Gas

Valve?

Yes

Replace the Gas Valve. Energize the system and check for proper operation.

With system energized, is 24 VAC present

across the "MV" and "GND"

terminals of the DSI

Module?

Yes

Replace High

Voltage (HV)

leads

Energize system

and check for

proper operation.

Replace

DSI Module

Yes

Check Spark Electrode for proper gap and insure that the spark is in the path of the gas flow... Refer To Service Section.

Make the necessary corrections. Energize system and check for proper operation.

f. Troubleshooting Flow Chart - Quick Reference...

Third Visual Check

(Does Main Burner Ignite?)

Does

main burner

remain

lit?

Yes

Does

ignitor spark turn

"OFF" with main

burner flame still

present?

Yes

Control's heat requirements satisfied. DSI cycle is complete.

the Flame Probe

have carbon or

Remove Flame Sensor Assembly. Clean the surface of the Flame Sensor Rod with fine

steel wool or emery cloth, then reinstall. Energize system and check for proper operation.

Does

dust build

up?

Yes

De-energize

the system and disconnect

Flame Sensor from the

DSI Module. Connect an ohmmeter

across the Flame Sensor

Sensor and ground.

Is resistance less

than 50 mega-ohms?

Connect

ohmmeter across

Flame Sensor lead

terminal and Flame Sensor.

Does continuity

exist?

Yes

Does ignitor spark continue with burner flame present?

Replace

DSI Module

Yes

Replace Flame Sensor

Assembly.

Yes

Energize system and check for proper operation.

DSI Module "GND"

terminal properly

connected to

ground?

Correct

ground wiring

Flame Sensor Probe

properly located in the flame?

Proper flame location would

provide adequate flame current

will not

yet

exceed maximum rod

temperature. Microammeter

reads 2µa or

greater.

Yes

Reposition Flame Sensor Probe to achieve a 2µa or greater sensor current or, if unattainable, replace the Sensor Probe Assembly.

3. Troubleshooting and System Detailed Diagnosis

When the dryer calls for heat, 24 VAC from the step down transformer is applied to the "TH" and "GND" terminals of the DSI (Direct Spark Ignition) module. The DSI module L.E.D. (light emitting diode) indicator will light "red" (for up to approximately 1.5-seconds [prepurge]) then the L.E.D. indicator will light "green"; the gas valve will be energized, and the spark burst will be evident (on) for approximately 8-seconds at the tip of the electrode flame-probe assembly. Flame should now be established and confirmed. If a flame sensed and confirmed by the ignitor and flame-probe sensor after the approximate 8-second spark burst, the DSI module will go into the "LOCK-OUT" mode and the L.E.D. will light "red" continuously. THERE

ARE NO RETRIES.

NOTE: If a fault is sensed, the "HEATER FAULT" indicator and the "End of Cycle" indicator will begin

to flash at a rate of one (1) flash per second. Both indicators will flash until the "HEATER FAULT" reset push-button has been reset/pressed.

To reset the dryer when a "HEATER FAULT" occurs, press the ("amber") "HEATER FAULT" reset push-button.

If a flame has been established and confirmed and then lost, the DSI (Direct Spark Ignition) module L.E.D. (light emitting diode) indicator will continue to light "green" and immediately a spark will be evident (on) for approximately 8-seconds. The flame should now be established and confirmed. If a flame is not sensed and confirmed by the ignitor and flame-probe sensor after the approximate 8-second spark burst, the DSI module will go into the "LOCK-OUT" mode and the L.E.D. will light "red" continuously. THERE ARE NO

RETRIES.

is not

NOTE: If a fault is sensed, the "HEATER FAULT" indicator and the "End of Cycle" indicator will begin

to flash at a rate of one (1) flash per second. Both indicators will flash until the "HEATER FAULT" reset push-button has been reset/pressed.

To reset the dryer when a "HEATER FAULT" occurs, press the ("amber") "HEATER FAULT" reset push-button.

a. System Diagnosis

1) Gas Pressure

A gas pressure test should be taken at the gas valve pressure tap provided on every gas valve to assure that the water column (W.C.) pressure is correct and consistent.

There are two (2) types of devices commonly used to measure water column (W.C.) pressure. They are the spring and mechanical type gauge and the water column test gauge (manometers). The use of the spring and mechanical type gauges IS NOT RECOMMENDED because they are not always accurate. The preferred type of gauge is the manometer because it is a simple device to use and is highly accurate. A manometer is simply a glass or transparent plastic tube with a scale graduated in inches. When it is filled with water and pressure is applied, the water in the inner tube lowers, showing the exact water column (in W.C.) pressure in inches.

WARNING: Test ALL connections for leaks by brushing on a

soapy water solution. NEVER TEST FOR LEAKS WITH A FLAME!!!

a) Connect the water column test gauge (manometer) to the gas valve pressure tap (1/8" N.P.T.). Refer

to the illustration above.

b) Start the dryer... with the burner on, the correct water column pressure (W.C.) reading in inches

should be:

Natural Gas .......................... 3.5 - 4 inches W.C.

L.P. (liquid propane) Gas ....... 10.5 - 11 inches W.C.

When a gas dryer in first started (during initial time of installation or start-up), it has a tendency not to ignite on the first ignition attempt. This is due to the fact that the gas supply piping is filled with air, so it may take a few minutes for the air to be purged from the supply lines. During this purge period there may be insufficient gas pressure for ignition, which might cause the DSI module to go into the "LOCK-OUT" mode (the L.E.D. [light emitting diode] will LIGHT "RED" CONTINUOUSLY).

NOTE: "HEATER FAULT" will occur during the initial set-up of the dryer, indicating that the burners

are not lighting due to air in the gas line.

To reset the dryer when a "HEATER FAULT" occurs, press the ("amber") "HEATER FAULT" reset push-button.

c) If gas pressure is low, unscrew slotted regulator cover on top of the gas valve and turn regulator

(pressure) adjustment screw (located underneath the cover) clockwise (CW) to increase the pressure.

2) Ignitor and Flame-Probe Assembly

The ignitor and flame-probe assembly consists of a ceramic insulated ignitor electrode, a ground rod, and a ceramic insulated flame-probe electrode. The GAP between the ignitor electrode and the ground rod is set, and must be maintained at 1/8" +/- 1/32" (.1250 +/- .03121). When the DSI (Direct Spark Ignition) module provides the high synchronous spark (14,000 volts) through the high voltage (HV) lead, a spark is produced over the GAP. When this spark is produced, the gas valve is opened. Upon ignition, the flame probe electrode (of the ignitor and flame-probe assembly) has high voltage provided to it that supplies a small current to ground through the flame. Once the current is sensed, it initializes the DSI module to sustain the gas flow (from the gas valve).

IMPORTANT: THE GAP SETTING ON THE IGNITOR AND

FLAME-PROBE ASSEMBLY IS CRITICAL.

a) DSI Ignitor and Flame-Probe Assembly Adjustments

(1) The GAP on the ignitor and flame-probe

assembly must be set, and held at 1/8" +/1/32" (.1250 +/- .03121). If this GAP is not

maintained (if the GAP is either to large or to small), the DSI (Direct Spark Ignition) module will indicate a system malfunction and go into the "LOCK-OUT" mode (the L.E.D. [light emitting diode] will LIGHT "RED" CONTINUOUSLY).

(a) To check and/or set the 1/8" GAP, use a DSI Gap Feeler Gauge or similar device to determine

GAP size. of the gap. If an adjustment is necessary, bend the ground rod to achieve the correct GAP, then recheck the 1/8" GAP with a feeler gauge.

(b) The ALIGNMENT of the ignitor and flame-probe assembly in relation to the GAP on the

ignitor electrode and ground rod must be maintained in as vertical (straight line) a position as possible (refer to the illustration on page 43) otherwise the DSI (Direct Spark Ignition) module will indicate a system malfunction and go into the "LOCK-OUT" mode (the L.E.D. [light emitting diode] indicator will LIGHT "RED" CONTINUOUSLY).

it provides the necessary feedback information to the DSI (Direct Spark Ignition) module. The flame probe electrode must be POSITIONED 1/4" minimum into the flame path (refer to the illustration on page 43) and must be POSITIONED 1-inch maximum from the burner tube (refer to the illustration on page 43) otherwise the DSI module will indicate a system malfunction and go into the "LOCK-OUT" mode (the L.E.D. indicator will LIGHT "RED" CONTINUOUSLY).

DO NOT USE FEELER TO SET THE GAP, use it only to determine the size

NOTE: To reset the dryer when a "HEATER FAULT" occurs, press the ("amber") "HEATER FAULT"

reset push-button.

3) Air Turbulence

If there is sail switch flutter due to air turbulence, or improper impellor (fan/blower) rotation, or a restriction in the exhaust duct work, the DSI (Direct Spark Ignition) module will cycle erratically. This in turn might cause the DSI module to "LOCK-OUT" (where the L.E.D. [light emitting diode] indicator will LIGHT "RED" CONTINUOUSLY).

a) If air turbulence causes the flame to move away from the flame probe electrode (of the ignitor/

flame-probe assembly), or if the flame goes out completely during the heat (flame) cycle, the DSI (Direct Spark Ignition) module will attempt to reestablish a flame by going into a re-ignition cycle.

4) Direct Spark Ignition (DSI) Module

If there is some sort of operational interference in the DSI system, the DSI (Direct Spark Ignition) module (acting as the "controller" for the system) will go into a "LOCK-OUT" mode (where the L.E.D. [light emitting diode] indicator will LIGHT "RED" CONTINUOUSLY).

a) Operational interference is any adverse condition (whether internal or external) to the system.

(Electrical noise is considered external noise interference because it can cause the DSI [Direct Spark Ignition] module to cycle erratically.)

NOTE: To reset the dryer when a "HEATER FAULT" occurs, press the ("amber") "HEATER FAULT"

reset push-button.

If the GAP, the ALIGNMENT, and the POSITION of the ignitor and flame-probe assembly are correct, if the gas flow and pressure is constant and consistent; if there is no adverse air turbulence; and if the DSI (Direct Spark Ignition) module remains in the "LOCK-OUT" mode (where the L.E.D. [light emitting diode] indicator will LIGHT "RED" CONTINUOUSLY) then, there is a malfunction with the DSI module itself, and it must be replaced.

5) Wiring

If the DSI (Direct Spark Ignition) module is in the "LOCK-OUT" mode (where the L.E.D. [light emitting diode] indicator will LIGHT "RED" CONTINUOUSLY) , and the mechanical components have been checked (i.e., the ignitor/flame-probe assembly, the gas valve, etc.), then, there may be a problem somewhere in the DSI system wiring.

a) Check

connections at the DSI module and the ignitor and flame-probe assembly.

ALL the wiring within the Direct Spark Ignition (DSI) system, especially the ground

NOTE: Check for any possible damage to the ceramic insulators on the ignitor electrode and the

flame-probe electrode of the ignitor and flame-probe assembly.

b) Make sure the flame-probe electrode of the ignitor and flame-probe assembly is positioned no

more than one (1) inch maximum from the burner tube.

CAUTION: DO NOT LET THE IGNITOR AND FLAME-PROBE ASSEMBLY TOUCH

THE BURNER TUBES; OTHERWISE THE ENTIRE ASSEMBLY WILL SHORT OUT.

6) Direct Spark Ignition (DSI) 24 VAC Transformer

The DSI transformer is designed to step down the operating voltage of the dryer to 24 VAC. This operates the DSI module. This transformer, like ALL transformers is two (2) sided;

a) Primary Side...

This is the incoming voltage side - 208 VAC, 230/240 VAC, 380 VAC, 416 VAC, 480 VAC - of the transformer.

b) Secondary Side...

This is the step down side - 24 VAC - of the transformer. (If the dryer is above 240 VAC a secondary voltage of 240 VAC will also be present.)

WARNING: 208 VAC and 230/240 VAC ARE NOT THE SAME. ALL voltage connections

should be checked and confirmed according to the foil data label provided with the individual dryer. Any damage done to dryer components due to improper voltage connections will automatically VOID THE WARRANTY.

IMPORTANT: The ADC Service Department must be contacted prior to any wiring change or

conversion because, depending on the change or conversion required, some parts may have to be added, deleted, or changed. When contacting the ADC Service Department, they must be given the correct model number(s) and serial number(s) for the dryer(s).

NOTE: Any wiring changes or conversions should be accomplished by a QUALIFIED

ELECTRICAL TECHNICIAN.

C. NATURAL GAS and L.P. (Liquid Propane) GAS CONVERSION INSTRUCTIONS

IMPORTANT: CONVERSION MUST BE PERFORMED BY COMPETENT TECHNICIANS

IN ACCORDANCE WITH LOCAL and STATE CODES.

NOTE: Converting the dryer to L.P. Gas disables the internal regulator of the gas valve, therefore, an

external regulator must be provided at the source of the L.P. gas supply (L.P. tank) on the dryer. The water column (W.C.) gas pressure must be regulated to between 10.5 -inches and 11-inches for safe and efficient dryer operation. Low, inconsistent, or too high a gas pressure will result in improper operation of the dryers' heat and safety circuits. CREATE A POTENTIAL SAFETY HAZARD.

1. Discontinue electrical service to the dryer.

POOR EFFICIENCY CAN

2. Close

3. Disconnect the gas valve wiring.

4. Disconnect union connection in the gas supply line.

ALL gas shut-off valves in the dryers' gas supply line.

Turn the gas cock dial to the off position on the gas valve.

Be sure to identify the correct location of each wire for correct reinstallation.

IMPORTANT: Pipe joint compounds that resist the action of natural gas and L.P. gas must be used.

5. Loosen and remove the screws from the brackets holding the gas valve/manifold assembly to the burner box.

6. Remove the gas valve and manifold assembly from the dryer.

7. Unscrew the main burner orifices and replace them with the L.P. orifices provided.

NOTE: Use extreme care when handling (removing or replacing) orifices. THESE ORIFICES ARE

MADE OF BRASS and CAN BE EASILY DAMAGED.

8. Remove the two (2) screws on the gas valve regulator.

Remove the regulator and the gasket.

9. Install the new gasket and L.P. regulator.

Replace the two (2) screws.

NOTE: USE ONLY NEW PARTS PROVIDED.

10. Place the L.P. conversion labels on the gas valve.

11. Reverse the procedure for reinstalling the gas valve/manifold assembly to the dryer.

12. Open

13. Reestablish electrical service to the dryer.

ALL gas shut-off valves (closed in Step #2).

a. Test ALL connections for leaks.

IMPORTANT: Test ALL connections for leaks by brushing on a soapy water solution (liquid

detergent works well).

WARNING: NEVER TEST FOR LEAKS WITH A FLAME!!!

14. Operate the dryer through one (1) complete drying cycle to insure proper operation.

D. STEAM COIL SYSTEM OPERATION

General Overview

The dryers' steam coil is constantly charged thereby eliminating repeated expansion and contraction and also provide instant heating to start the drying process. The steam damper, located on top of the steam coil, is the only temperature controlling device in this system. When the steam damper is open, ambient air is drawn through the coil providing heat to the dryer. When the steam damper is closed, ambient air is drawn directly into the tumbler, bypassing the coil, allowing a rapid cool down.

NOTE: With the dryer off or no air supply to the damper piston, the damper is in the Cool Down mode...

the coil is constantly charged.

1. Steam Coil PH Level

The normal PH level for copper type steam coils must be maintained between a value of 8.5 to 9.5. For steel type steam coils the PH level must be maintained between a value of 9.5 to 10.5. These limits are set to limit the acid attack of the steam coils.

IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY.

2. Steam Damper Actuator System

The steam damper actuator system consists of a hinged damper plate, pneumatic piston, and a 24 volt solenoid valve with a needle valve to control the speed of the piston actuation.

On a call for heat, a 24 volt signal is applied to the 3-way/2-position solenoid valve. This signal switches the valve so that compressed air is sent to the piston. The piston rod extends, pushing the hinged steam damper plate to the open position. This allows room air to be drawn through the hot steam coil and then through the basket (tumbler).

When the temperature set point has been reached, the 24 volt signal is removed from the solenoid valve, so that the solenoid valve blocks the air supply to the piston, and air in the piston is bled to the atmosphere. The spring in the piston now retracts the piston rod, closing the steam damper. The steam damper plate now covers the steam coil and allows room air to bypass the coil before entering the basket (tumbler) for a rapid cool down.

The steam damper plate should open and close slowly and smoothly. The speed can be modulated by adjusting the needle valve knob. Turning the knob clockwise (CW) restricts the compressed air flow and slows the steam damper movement. Counterclockwise (CCW) adjustment speeds up the steam damper motion. Upon completion of the adjustment, tighten the needle valve's locking nut.

3. Steam Damper Actuator System Service and Replacement

a. Steam Damper Cylinder or Piston Replacement

1) Disconnect compressed air supply from the dryer.

2) Disconnect tubing from the piston.

3) Remove the spring clip from clevis pin then slide out the clevis pin.

4) Remove the steam damper cylinder (piston).

5) To install new steam damper cylinder (piston), reverse above procedure.

b. Steam Solenoid Valve Replacement

1) Disconnect compressed air supply from the dryer.

2) Discontinue electrical service to the dryer.

3) Disconnect wires in junction box.

4) Remove tubing from the inlet side of the valve.

5) Remove the valve from the bracket.

6) Unscrew the valve from the outlet side.

7) To install new steam solenoid valve, reverse above procedure.

c. Needle Valve Replacement

1) Disconnect compressed air supply from the dryer.

2) Remove tubing from the valve.

3) Unscrew needle valve from the solenoid valve.

4) To install new needle valve, reverse above procedure.

d. Steam Coil Replacement

1) Discontinue electrical service to the dryer.

2) Disconnect compressed air supply from the dryer.

3) Shut off

4) Wait a sufficient amount of time until ALL of the steam lines and the steam coil is cool.

5) Open 1/2" plug on the return line to bleed off any residual steam pressure.

ALL steam supply lines and steam return valves that feed the steam coil.

CAUTION: MAKE CERTAIN THAT THE ENTIRE STEAM SYSTEM (coil, lines, valves,

etc.) ARE COOLED TO AVOID HOT STEAM ESCAPING and TO AVOID PERSONAL INJURY.

6) Remove steam coil damper cylinder (piston).

7) Remove the steam coil damper by unbolting from its hinges.

8) Disconnect steam supply lines and steam return lines at the unions.

9) Remove the remaining piping from the steam coil

10) Remove ALL of the panels surrounding the steam coil.

11) Unbolt the steam coil and remove.

WARNING: THE STEAM COIL IS HEAVY. A crane may be needed to remove (and install) the

steam coil.

12) Remove the steam coil damper hinges from the old coil and install them on the new steam coil.

13) Hoist the new steam coil into place and bolt down.

14) Replace

15) Reinstall

ALL of the panels removed in Step #10.

ALL of the piping removed from the old steam coil in Step #9.

NOTE: Thread sealant certified for steam piping must be applied to the threads.

16) Reconnect ALL of the piping (supply lines and return lines) disconnected in Step #8.

17) Reinstall steam damper cylinder (piston) removed in Step #6.

18) Reestablish electrical service to the dryer.

19) Close the 1/2" plug which was opened in Step #5.

WARNING: THE 1/2" PLUG MUST BE CLOSED BEFORE ATTEMPTING TO APPLY ANY

STEAM PRESSURE.

20) Slowly open the return line then slowly open the supply line.

E. SPRINKLER SYSTEM DESCRIPTION

The sprinkler system is monitored by a microprocessor based temperature controller as a designated "FAIL- SAFE." The microprocessor circuit must have power in order to engage main power to the dryer. When cycling the dryer, if the temperature at the Resistive Temperature Device (RTD) reaches 575º F, one (1) set of contact in the controller will open, disabling the power (electric supply) to the dryer. Another set of contacts will close, sounding the alarm and turning on the sprinkler.

NOTE: The sprinkler as well as the alarm will remain on until the "amber" colored sprinkler reset button

is pressed and the temperature in the tumbler (basket) falls below 575º F (301.6 º C).

1. Description Of Components

a) Resistive Temperature Device (RTD)

The RTD is located above the tumbler (basket). The probe is a 100 Ω (ohm) platinum RTD. As the temperature increases or decreases the resistance value corresponds to the ambient temperature (i.e., 100 Ω = 32º F / 0º C ... 109 Ω = 75º F / 24º C).

b) Sprinkler Valve

The sprinkler valve is a 2-way

, air piloted, normally closed valve.

With pilot air pressure applied, the valve opens allowing water to flow.

c) Sprinkler Solenoid Valve

The sprinkler solenoid valve is a 3-way/2-position solenoid valve that is used to supply pilot air to the sprinkler valve.

MAN3479

MAN3187

d) Sprinkler Digital Temperature Controller

The sprinkler digital temperature controller is a programmable microprocessor used to monitor temperatures via a Resistive Temperature Device (RTD).

NOTE: Operating parameters are preset at the factory and should not

require any adjustment.

2. Sprinkler System Operation

NOTE: Refer to the ladder diagram provided with the dryer for specific relay logic.

Master Relay -The coil in this relay must be

energized in order to close the contacts needed to supply power to the dryers control system.

Relay 1 - The coil in this relay energizes if the set-

point is reached closing Contact 1 and Contact 2. Contact 1 latches Relay 1 on. Contact 2 closes, turning on the sprinkler, the horn, and the reset button light. Relay 1 will remain energized until the reset button is pushed.

MAN3488

Relay 2 - The coil in this relay energizes if the set-

point is reached closing Contact 3, deenergizing the Master Relay, and shutting power off to the dryer. Relay 2 will remain energized until the reset button is pushed.

NOTE: The Sprinkler System will remain on

until the tumbler (basket) temperature falls below the set-point, and the reset button is manually activated.

3. Sprinkler System Component Replacement

a. Resistive Temperature Device (RTD) Replacement

1) Turn the water supply to the dryer off.

2) Discontinue electrical service to the dryer.

3) Remove the 1/4" compression fitting.

4) Remove the two (2) screws from the junction box cover.

5) Remove the wires of the RTD (Resistive Temperature Device) from the terminal strip.

NOTE: Identify the wires removed for proper reinstallation.

6) Loosen the cord grip cap.

7) Remove Resistive Temperature Device (RTD).

8) To install new RTD (Resistive Temperature Device), reverse above procedure..

prior to November 14, 1996

as of November 14, 1996

b. Sprinkler Valve Replacement

1) Turn the water supply to the dryer off.

2) Discontinue electrical service to the dryer.

3) Disconnect compressed air supply from the dryer.

4) Loosen and remove the hose clamp.

5) Remove any residual water to the valve.

6) Remove 1/4" air tubing going to the valve.

7) Remove the two (2) U-bolts holding the sprinkler valve assembly.

8) Unscrew the sprinkler valve from the tubing.

9) To install new sprinkler valve, reverse above procedure.

c. 3 HP Control Relay Replacement

WARNING: THE SPRINKLER CIRCUIT HAS A SEPARATE POWER SUPPLY (then the power

supply for the dryer). DISCONNECT and LOCK-OUT BOTH POWER SUPPLIES BEFORE SERVICING THE DRYER.

1) Mark and identify the wires that will be removed for proper reinstallation.

2) Press down on the control relay and lift the bottom out and up to remove from the din rail.

3) Remove the wires.

4) Replace the bad control relay.

5) Replace the wires removed from Step #3.

NOTE: Make sure wires are properly reinstalled using identifying markings from Step #1.

6) Mount the top of the control relay to the top of the din rail, then press down and snap the bottom into the rail.

Set the overload to the setting specified on the dryer blueprints.

7) Inspect the work performed before reestablishing electrical service to the dryer.

8) Reestablish electrical service to the dryer.

MAN3169

F. TILTING SYSTEM DESCRIPTION

The tilting system in the dryer, whether it be 1-way tilt or 2-way tilt, is controlled by the Micro-1 Programmable Logic Controller (PLC). The PLC (Programmable Logic Controller) will determine if the dryer is safe to tilt based on inputs from several sources. If ALL conditions are met, the PLC will send a signal to the tilt relays which energize the appropriate tilt solenoid valve. Compressed air is then allowed to enter the cylinders raising the tumbler.

1. Speed Adjustment

The speed of the tilting action can be regulated by adjusting the set of flow control valves located on the pneumatic panel. Each set of cylinders, both front and rear, will have two (2) flow control valves. One valve will be the extend (up) air line and the other valve will be retract (down) air line. The speed of the cylinder is controlled by restricting the exhaust air flow from the cylinder. For example, if the front cylinders are extending, compressed air flows unrestricted into the cylinder causing the piston to move. The air being displaced (exhausted) from the opposite side of the cylinder can be restricted regulating the speed of extension.

Tilting Solenoid Valve

The dryer uses a 3-position / 4-way / 5-port, spring centering double solenoid valve. With no power applied to either solenoid, the valve is in a spring centered blocked post state. In this mode, the dryers' tilting pistons will remain in their present state, not being able to exhaust air or receive air. When the left solenoid is energized with 24 VAC, the pilot air pushes the shuttle to the right enabling air to flow into the #2 port and exhausts #4 port. On 2-Way Tilt models, this is dependent on a supply of external pilot air from the #4 port of the opposite solenoid valve. When the right solenoid of the valve is energized, air flows through the #4 port and the #2 port exhausts the pilot air, the right side of the valve is always internal pilot.

The tilting solenoid valve has two (2) mufflers. The air is exhausted through these mufflers thereby quieting the air flow.

3. Tilting Pistons

The tilting piston is a double acting cylinder that has a 5-inch bore and an 14-inch stroke. When air is applied to the bottom port of the cylinder, the piston begins to extend and air is exhausted through the top port. Then, if air is applied to the top port, the bottom port will exhaust the air which will cause the piston to retract.

Tilting System Component Replacement

CAUTION: NEVER SERVICE PNEUMATIC COMPONENTS WITH COMPRESSED

AIR CONNECTED. SERIOUS INJURY MAY RESULT.

a. Flow Control Valves

To replace a defective or clogged flow control valve

1) Disconnect compressed air supply from the dryer.

2) Tilt, then level the dryer to exhaust as much air as possible.

3) Remove the two (2) compression fittings on each side of the valve. (Refer to the illustration on page 63.)

4) Remove the 3/8" straight connector.

5) Remove the 3/8" elbow.

6) Remove flow control valve.

7) To install new flow control valve, reverse above procedure (Step #6 through Step #1).

b. Tilting Solenoid Replacement

1) Engage "EMERGENCY STOP" (E-Stop)...

Discontinue electrical service to the dryer.

2) Remove panel covering the pneumatic controls.

3) Label the solenoid plugs as an aid when reconnecting.

4) Loosen screws from the solenoid plug.

5) Remove the solenoid plug (take notice of the gaskets).

6) Remove the E-Clip by gently prying off.

7) Slide tilting solenoid valve up off of the post.

8) To install new tilting solenoid valve, reverse above procedure.

c. Tilting Solenoid Valve Replacement

1) Disconnect compressed air supply from the dryer.

2) Tilt, then level the dryer to exhaust as much air as possible.

3) Disengage "EMERGENCY STOP" (E-Stop)...

Discontinue electrical service to the dryer.

4) Label the solenoid plugs and air lines as an aid when reconnecting.

5) Loosen screws from the solenoid plug.

6) Remove the solenoid plug (take notice of the gaskets). Refer to the illustration on

7) Loosen compression fittings on the air lines...

Disconnect the three (3) air lines.

8) Remove the two (2) 1/4-20 hex head bolts that mount the solenoid valve. (Refer to the illustration on page 63.)

9) Remove the three (3) 3/8" straight connectors. (Refer to the illustration on page 63.)

page 63.

Reinstall these connectors on the new solenoid valve body.

10) Remove the two (2) 3/8" mufflers. (Refer to the illustration on page 63.)

Reinstall these mufflers on the new solenoid valve body.

11) The left orifice (marked #12 on the tilting solenoid valve) now must be configured for external pilot.

NOTE: For 1-Way Tilt models proceed to Step #23.

12) Remove the two (2) Phillips head screws.

13) Carefully remove the end of the valve.

NOTE: The pieces within the end of the valve are small. Handle carefully to avoid losing parts.

14) Place the solenoid plug over the pilot orifice position of the solenoid valve end.

15) Place the O-ring (from Step #13) into the top portion of the solenoid valve end.

16) Place end back onto the valve removed in Step #13.

17) Replace the two (2) Phillips head screws removed in Step #12.

18) Remove Allen plug on the left side of the orifice marked #12 on the tilting solenoid valve.

19) Remove the pilot air's 1/4" compression fitting.

20) Remove the pilot air's 1/8" elbow.

Reinstall the elbow onto the new solenoid valve body.

21) Reconnect the three (3) air lines removed in Step #7.

Tighten/secure compression fittings on the air lines loosened in Step #7.

22) Bolt the solenoid valve in place using the two (2) 1/4-20 hex head bolts removed in Step #8.

23) Reconnect the three (3) air line compression fittings.

24) Reestablish the compressed air supply to the dryer.

25) Check for leaks.

26) Reestablish electrical service to the dryer.

27) Engage "EMERGENCY STOP" (E-Stop) disengaged in Step #3.

d. Tilting Piston Replacement

1) Disconnect compressed air supply from the dryer.

2) Tilt, then level the dryer to exhaust as much air as possible.

3) Disengage "EMERGENCY STOP" (E-Stop)...

Discontinue electric service to the dryer.

4) Remove the six (6) screws holding the piston cover plate.

5) Label the air lines as an aid when reconnecting.

6) Loosen the 3/8" compression fittings...

Remove the air lines.

7) Remove the 3/8" straight connector.

8) Remove the 3/8" elbow.

9) Carefully remove the E-Clips from the clevis pins.

10) Remove clevis pins.

11) Loosen the bottom set screw in the piston rod eye.

12) Unscrew the piston rod eye from the tilting piston.

13) To install new tilting piston, reverse above procedure.

G. AIR JET ASSEMBLY

1. Air Jet Assembly Description

The air jet assembly is located in the left front base of the dryer. The air jet is designed to operate at the end

each cycle for thirty (30) seconds, to remove lint which may have accumulated on the blower (impellor)

of fan blades. This function will be interrupted if the main door or lint drawer is opened before the air jet cycle is complete.

Air Jet Component Replacement

a. 24 VAC 3-Way Pressure Valve Replacement

1) Disconnect compressed air supply from the dryer.

2) Discontinue electrical service to the dryer.

3) Remove the 1/4" x 1/8" M.P.T. connection from the 3-way pressure valve body.

4) Remove the two (2) #10-16 x 1/2" crimptite TEK screws.

5) Remove the valve support.

6) Remove the two (2) #6-32 x 1" hex head machine bolts by removing the two (2) #6 hex nuts and the two (2) #6 star washers.

7) To install new air jet assembly, reverse above procedure.

b. Pneumatic Valve Muffler Replacement

1) Disconnect compressed air supply from the dryer.

2) Remove damaged or nonfunctional muffler from valve body.

3) Replace muffler by threading into valve body (snug fit).

4) Reconnect compressed air supply to the dryer.

H. BLOWER (Squirrel Cage Fan) MOTOR ASSEMBLY

1. Blower (Squirrel Cage) Motor Description

The AD-310 uses an 18-inch diameter, blower (squirrel cage fan) wheel. It spins (turns) in a counterclockwise (CCW) direction when looking at the back of the blower housing.

The blower (squirrel cage fan) shaft is mounted in two (2) 1-3/8" diameter pillow block bearings, and the shaft is driven by two (2) B-section V-belts connected to the blower motor).

The blower (drive) motor is mounted on an adjustable base. The motor position can be easily adjusted so that the proper tension can be maintained on the V-belts.

2. Blower (squirrel cage fan) and Fan Motor Component Replacement

a) Blower (squirrel cage fan) Motor Replacement

1) Discontinue electrical service to the dryer.

2) Mark and identify the wires that will be removed for proper reinstallation.

3) Loosen the bolts from the motor to the motor base ...

(a) Slide the blower (squirrel cage fan) motor forward.

(b) Remove the V-belts.

4) Remove the bolts from the bushing.

5) Insert bolts into the threaded holes.

6) Tighten the bolts evenly for motor pulley removal.

7) Mark the inside of the motors' shaft before removing the bushing.

8) Loosen the set screws on the bushing.

MAN3286

9) Remove the bushing.

10) Measure the mark on the shaft (from Step #7) to the end of the shaft and mark the new motors' shaft.

11) Slide the motor pulley on to the new blower (squirrel cage fan) motors' shaft.

12) Slide the bushing on to the shaft until the inside of the bushing meets the mark (from Step #11) on the new motors' shaft.

13) Tighten and secure the set screws on the bushing.

14) Insert bolts into the large holes on the bushing and thread them into the motor pulley.

15) Tighten the bolts evenly for motor pulley installation.

16) Align the pulleys.

17) Tighten (hand tight only) the bolts from the new motor to the motor base ...

Leave enough movement for V-belt adjustment.

MAN3286

18) Replace the V-belts ...

(a) Adjust to proper tension by adjusting position of the new blower (squirrel cage fan) motor.

(b) Align the V-belts.

19) Tighten and secure the new motor to the motor base.

20) Rewire the new blower (squirrel cage fan) motor in the same order as the wiring from the motor that was removed.

A wiring diagram is usually affixed to the side of the motor.

21) Reestablish electrical service to the dryer.

b) Shrouded Pillow Block Bearing Replacement

1) Discontinue electrical service to the dryer.

2) Remove the bolts securing the blower (squirrel cage fan) motor.

(a) Slide the blower (squirrel cage fan) motor forward.

3) Remove the V-belts from the motor pulley and the pulley on the fan (blower) shaft assembly.

4) Move the blower (squirrel cage fan) motor so as to be able to remove the fan (blower) shaft bearing mount assembly.

5) Remove the bolts securing the blower (squirrel cage fan) shaft bearing mount assembly.

(a) Slide the fan shaft assembly with the fan (squirrel cage fan) backwards.

6) Remove the two (2) left hand jam nuts and the washer.

7) Remove the blower (squirrel cage fan) and the key.

8) Remove the four (4) bolts securing the shrouded pillow block bearing.

9) Remove the squirrel cage fan shaft assembly from the squirrel cage fan shaft bearing mount assembly ...

(a) Remove the pillow block on the squirrel cage fan side of the fan shaft by loosening the set screws

on the pillow block bearing.

10) To remove the pillow block bearing on the pulley side of the fan shaft the pulley must be removed first ...

(a) Remove the bolts from the bushing.

(b) Insert bolts into the threaded holes.

(d) Loosen the set screws on the bushing.

(e) Remove the bushing and the pulley.

11) Remove the shrouded pillow block bearing by removing the set screw.

12) Replace the shrouded pillow block bearing on to the fan shaft ...

(a) Secure the fan (blower) shaft bearing mount assembly.

(b) Tighten and secure the set screws in the shrouded pillow block bearing.

NOTE: Make certain that the squirrel cage fan (impellor and blower) can spin freely.

13) Reinstall the bushing and the pulley.

(a) Line up the bushing to the mark on the motor shaft and tighten and secure the set screw.

(b) Reinstall the bolts into the original holes and tighten evenly for correct pulley installation.

14) Reposition the blower (squirrel cage fan) motor to its' original position ...

(a) Tighten (hand tight only) the bolts into the motor and the motor base.

(b) Slide the blower (squirrel cage fan) motor forward.

Align the pulleys before installing the V-belts.

IMPORTANT: DO NOT OVERTIGHTEN V-BELTS.

15) When V-belts are properly tensioned, tighten and secure the motor to the motor base.

16) Reestablish electrical service to the dryer.

c) Squirrel Cage Fan (impellor) Replacement

1) Discontinue electrical service to the dryer.

2) Remove the bolts securing the blower (squirrel cage fan) motor.

3) Remove the V-belts.

4) Slide the blower (squirrel cage fan) motor to the side.

5) Remove the bolts from the blower (squirrel cage fan) shaft bearing mount assembly.

(a) Slide the blower (squirrel cage fan) shaft bearing mount assembly backwards.

6) Remove the two (2) left hand jam nuts and the washer.

7) Remove the key on the blower (squirrel cage fan) shaft.

(a) Slide the blower (squirrel cage fan) off of the shaft.

NOTE: Install this key on to the fan shaft before installing the new blower (squirrel cage fan).

8) To install blower (new squirrel cage fan) , reverse above procedure.

d) V-Belt Replacement

1) Discontinue electrical power to the dryer.

2) Loosen the bolts securing the blower (squirrel cage fan) motor.

(a) Ease off on the tension bolt.

3) Slide the blower (squirrel cage fan) motor forward.

4) Remove and replace V-belts.

5) Tighten and secure the tension bolt.

IMPORTANT: DO NOT OVERTIGHTEN V-BELTS.

6) Using a straight edge, make certain that the motor pulley and V-belts are aligned straight.

7) Tighten and secure bolts from motor to motor base.

8) Reestablish electrical service to the dryer.

e) Fan (impellor) Shaft Replacement

The procedure to replace the Fan Shaft is the same procedure used to replace the Shrouded Pillow Block Bearing (refer to previous pages (page 69 and page 70).

3. Blower (squirrel cage fan) Electrical Components

a) Blower (squirrel cage fan) Controls and Overloads

1) Thermal Magnetic Starter (TMS)

The thermal magnetic starter is used as a safety device to protect the motor from starting in a locked rotor condition. The overload has a dial setting on the face of the device. To set the overload, refer to your specific electrical diagrams. The overload is specifically designed for motor applications. It has a current curve built into it so the initial high current draw by the motor will not trip the overload. On the face of the overload, there are two (2) push buttons - "START" (Black or Tan - 1) and "STOP" (Red - 0) - the overload has to be in the "START" mode for the motor to run.

(a) Thermal Magnetic Starter (TMS) Replacement

(1) Discontinue electrical service to the dryer.

(2) Mark L1, L2, L3, and T1, T2, T3 on the wires to the to the TMS for correct replacement.

(3) Set the amp rating on the TMS according to the manufacturers electrical schematic on the

new thermal magnetic starter.

(4) To remove the thermal magnetic starter, pull the tab on the bottom and lift upward.

(5) To install new thermal magnetic starter, reverse above procedure.

2) Auxiliary Contact Block

The Auxiliary Contact Block is mounted on the side of the overload. Its' function is to sense an overload trip, thereby triggering a safety fault which will disable the drying cycle. A "DOOR" message will appear on the L.E.D. (light emitting diode) display on the Phase 5 microprocessor controller (computer).

(a) Auxiliary Contact Block Replacement

(1) Discontinue electrical power to the dryer.

(2) Remove the Thermal Magnetic Starter (TMS) from the din rail by pulling the tab on the

bottom of the contact block and lifting upward.

(3) Remove the two (2) wires going to the auxiliary contact block and label for correct reinstallation.

(4) There are two (2) types of auxiliary contact blocks... one with a screw and the other with a

clip ...

To remove the style with the screw from the thermal magnetic starter simply remove the screw.

To remove the style with a clip simply push in the clip and remove.

(5) To install new auxiliary contact block, reverse above procedure.

3) Varistor (MOV)

The Varistor - MOV (Metal Oxide Varistor) is used to suppress any inductive electrical spikes produced by the energizing and collapsing of the coil voltage.

(a) Varistor (MOV) Replacement

(1) Discontinue electrical service to the dryer.

(2) Loosen the screws marked A1 and A2 on the contactor.

(3) Remove the varistor.

(4) Verify that no additional wires were inadvertently removed.

(5) Reverse procedure to install new varistor.

I. FILTER and REGULATOR ASSEMBLY

The purpose of the filter is to remove bulk liquids and solid particles from the compressed air stream. The filter element provides mechanical separation of solids. Centrifugal force inside the filter bowl separates bulk liquids and larger solid particles.

The filter consists of a louver which causes a centrifugal spinning action to separate contaminants. A filter which mechanically separates contaminants is also present. The filter bowl collects the contaminants and a baffle prevents turbulence from picking up contaminants at the bottom of the bowl and returning them to the air stream.

1. Filter Maintenance

a. To remove filter element ...

Twist the filter bowl 1/8 turn clockwise (CW). Then pull the bowl down to expose the filter element. To remove the filter element, unscrew the baffle (this will allow element removal).

b. To clean filter element ...

The filter element can be cleaned with soap and water.

NOTE: When replacing the filter element bowl care must be

taken to ensure that the O-ring does not get pinched.

2. Regulator Operation

The adjustment knob simply acts upon a spring rest located on the spring and directly compresses the spring as it is adjusted. A nonrising low torque adjustment screw is used on this type of filter and regulator. The upper spring rest is located on top of the regulator spring and transmits force from the adjustment screw to the spring. Regulators use simple wire coil springs for controlling the downstream regulator pressure. The bonnet houses the adjustment spring and is used to help retain the diaphragm. The diaphragm moves up when the downstream pressure reaches its preset pressure level, which in turn closes the valve. A self-relieving regulator is designed to automatically relieve overpressure in the secondary side of the regulator.

FILTER / REGULATOR

NOTE: THIS SELF-RELIEVING FEATURE IS NOT DESIGNED TO BLEED THE DOWN-

STREAM PRESSURE.

Dryer must be provided with a clean, dry, regulated 80 PSI (+/- 10 PSI) air supply (equivalent volume - 9 cfh).

The regulator should be set at 80 PSI (+/- 10 PSI). To set pressure, pull the adjusting knob up and either turn the knob clockwise (CW) to increase the pressure or counterclockwise (CCW) to decrease the pressure.

J. DOOR SYSTEMS

The dryer utilizes two (2) styles of doors, which are Manual Doors and Pneumatic Automatic Doors.

1. Manual Door Description

The Manual Doors run on a single aluminum track with a wheel assembly mounted above the doors and a channel with teflon strips mounted on the bottom of the doors ...

a. For dryers manufactured as of November 1, 1995, there are trolley bolts located at the top of the doors to

secure the doors onto the track.

b. For dryers manufactured prior to November 1, 1995, there are two (2) adjustment plates located at the top

of the doors to secure the doors onto the track.

In the center portion on the top of the doors there is a magnet used in conjunction with proximity sensors which are mounted above the doors.

2. Pneumatic Automatic Description/Operation

a. Description

The Pneumatic Automatic Doors run on a single aluminum track mounted above the doors and a split track mounted on the bottom of the doors. The doors are held on the track by four (4) stainless steel wheel assemblies; two (2) are located on the top of the doors and two (2) are located on the bottom of the doors. Additionally, in the center portion on the top of the doors there is a magnet used in conjunction with proximity sensors which are mounted above the doors.

b. Operation

There are two (2) 1" bore x 18-3/8" stroke cable cylinders attached to the top of the doors to pneumatically open and close the doors. When air is applied into the outside ports of these cable cylinders the doors will open. If air is applied into the inside ports of these cable cylinders the doors will close. On each of the four (4) ports is a flow control valve used for adjusting the opening and closing speeds of the doors. These flow controls only vary the speed in the exhaust direction. Air to the cable cylinders is supplied through a 4-way valve. When 24 VAC is applied to the valve, the doors open... if no power is applied, the doors close. A 3-way valve is used to supply air to the 4-way valve.

If the "EMERGENCY STOP" (E-Stop) is engaged, the air is automatically exhausted so that the doors can be opened manually.

1) In a 2-Door application, there are two (2) additional cable cylinders a 4-way valve added for the operation of the rear doors.

3. Door Component Replacement and Removal

a. Manual Door Replacement or Removal

1) Discontinue electrical service to the dryer.

2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard and then remove the guard.

a) For dryers manufactured as of November 1, 1995, loosen the jam nut and screw down the trolley

adjustment bolts.

b) For dryers manufactured prior to November 1, 1995, remove the two (2) trolley adjustment plates.

3) Lift the door(s) off of the track(s) and remove.

4) To install new manual door(s) or to reinstall manual door(s), reverse above procedure Step #3 through Step #1.

b. Pneumatic Automatic Door Replacement or Removal

1) Discontinue electrical service to the dryer.

2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard.

Remove the middle guard.

3) Remove the three (3) 1/4-20 x 3/4" bolts from the bottom guard.

Remove the bottom guard.

4) Remove the two (2) 8-32 x 3/4" screws on each door that connect/attach the cable cylinder to the door.

5) Remove the two (2) 1/4-20 x 1-1/4" hex head machine screws that hold the wheels on ...

a) Take notice to the wheel assembly configuration.

6) Lift the doors off of the track and remove.

7) To install new pneumatic automatic doors or to reinstall pneumatic automatic doors, reverse above procedure.

c. Cable Cylinder Replacement or Removal

1) Discontinue electrical service to the dryer.

2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard. (Refer to the illustration on page 76.)

Remove the middle guard.

3) Disconnect the cables in the top of the electrical panel.

4) Remove the hardware from the top guard.

Remove the top guard.

5) Remove the two (2) 8-32 x 3/4" screws on each door that attach the cable cylinder to the door.

6) Remove the four (4) 8-32 x 2-1/2" screws that hold each cable cylinder.

7) Remove the flow control valve ...

a) The flow control valve has a quick disconnect on the poly flow tubing side ...

Push the tubing in while holding in then pull the tubing out.

8) To install new cable cylinder(s) or reinstall cable cylinder(s), reverse above procedure.

d. Proximity Switch Replacement

1) Discontinue electrical service to the dryer.

2) Remove the two (2) 1/4-20 x 1/2" bolts from each side of the middle guard and then remove the guard.

3) Remove the three (3) 1/4-20 x 3/4" bolts from the bottom guard.

Take notice of the depth of the proximity switch.

4) Unscrew and remove the nut that is on the bottom of the proximity switch.

5) Install new proximity switch.

6) Set gap between the proximity switch and the magnet at 3/16" (+/- 1/32").

7) Reinstall middle guard and secure with the bolts removed in Step #2.

8) Reestablish electrical service to the dryer.

e. Right Load Door Glass (Window) Replacement

1) Remove ALL of the old silicone from around the door glass.

2) Clean glass door opening (with alcohol) to remove ALL foreign residue.

3) Carefully clean new door glass with alcohol prior to installation.

4) Apply a bead of silicone (ADC Part No. 170730) to the outer perimeter of the door glass opening.

Carefully insert new door glass within door glass opening.

5) Allow a full 72 hours for the silicone to cure.

6) Trim excess silicone (with razor blade) after cure time.

f. 4-Way Valve, and 3-Way Valve and Supply Air Disable Valve Replacement

1) Discontinue electrical service to the dryer.

2) Disconnect compressed air supply from the dryer.

3) Remove the 1/4-20 self-tapping screws securing the pneumatic panel cover.

4) Remove the two (2) 1/4-20 screws securing the junction box cover.

5) Loosen the cord grip cap that the valve wire go through.

6) Loosen the appropriate wire on the terminal strip.

Identify these wires and make note of their placement.

7) Loosen the bolts holding the assembly to the pneumatic panel.

(For 3-way valve/supply air disable valve replacement proceed to Step #13.)

8) Remove the two (2) 1/4" poly compression fittings (door open - door close).

9) Remove the two (2) 1/4" poly x 1/8" M.P.T. connectors from the valve body.

10) Twist/remove the 4-way valve body off of the 1/8" street elbow.

11) Remove the muffler off of the valve body.

12) To install new 4-way valve, reverse above procedure (Step #11 through Step #1).

13) Remove the 1/4" poly compression fitting.

14) Remove the 3-way valve and supply air disable valve from the 1/8" M.P.T. nipple.

15) Remove the muffler off of the valve body.

16) To install new 3-way valve and supply air disable valve, reverse Step #1 through Step #7, Step #13, Step #14, and Step #15.

K. Control and Electrical System

Ladder Diagram

CAUTION: When servicing the HIGH VOLTAGE section of the dryer, the ELECTRIC

SERVICE MUST BE DISABLED.

THE "EMERGENCY STOP" (E-Stop)

BUTTON DOES NOT DISABLE THE HIGH VOLTAGE TO THE DRYER.

1. Control/Electrical System Description

a. 3-Phase (3ø) Electrical Power

The 3-phase (3ø) electrical power for the dryer enters the dryer through the power distribution block located in the dryer base electrical box. It is then distributed to the blower (impellor/fan) motor, drive (tumbler/basket) motor, and transfer circuits.

1) Blower (squirrel cage fan) Motor

The Blower (squirrel cage fan) Motor circuit consists of a blower motor thermal magnetic overload. The overload current is adjustable by a dial located on the face of the overload. (Refer to the electrical specification diagram for correct current setting.)

Attached to the thermal magnetic starter is an auxiliary contact used to sense an overload trip. This produces a safety error so the dryer service is disabled (the dryer will not start).

In series with the thermal magnetic overload is the blower motor contactor. This device enables the supply voltage to reach the blower (squirrel cage fan) motor. The blower motor contactor is controlled by the Phase 5 microprocessor controller (computer). (Refer to Section b-1 on page 86 for micro- processor [computer] information.) When 24 VAC is applied to coil A1-A2, the contactor closes and enables the circuit.

The blower (squirrel cage fan) motor used for gas model dryers is 15 HP (horsepower) and for steam model dryers is 25 HP (horsepower). The motor wiring configuration is dependent on the specific voltage of the dryer. When wiring the motor, refer to the motor nameplate.

2) Drive (tumbler and basket) Motor

The Drive (tumbler and basket) Motor is supplied by the 3-phase (3ø) power source entering the drive motor thermal magnetic overload. The overload current is adjustable by a dial located on the face of the overload. (Refer to the electrical specification diagram for correct current setting.) In this circuit, the drive motor contactor follows the thermal magnetic overload.

The drive motor has two (2) separate sets of coils and two (2) separate sets of contacts. One (1) of these sets is for forward tumbler (basket and drum) rotation and the other for reverse tumbler (basket and drum) rotation. The thermal magnetic overloads and the contactors are located in the left hand electrical cabinet. The direction of the drive motor is determined by the phases going into the motor (i.e., in a reverse direction phase, L1 and L2 are switched). When viewing this contactor (from the front of the dryer), the left hand block connections are for the forward rotation direction (clockwise [CW]).

The drive (tumbler and basket) motor is a 5 HP (horsepower) motor. Refer to the motor nameplate for specific terminal box wiring.

3) 24 VAC Transformer

The 24 VAC transformer consists of fuse 1 (F1) and fuse 2 (F2) which is the primary fusing for the transformer. For the proper rating of these fuses refer to the specific electric diagram. The transformer is located in the right hand electrical cabinet.

Dryer models with an optional Sprinkler System have an energizing stop relay which will disable the dryer functions (shut the dryer down) in the event of a fire. NOT ENERGIZED (POWERED) THE DRYER WILL NOT OPERATE. The Energizing Stop Push Button is located on the front right electrical panel. On 2-Door models this Energizing Stop Push Button is located on the right rear side of the electrical panel (when viewed from the rear).

On dryer models manufactured for 208 volt or 240 volt electric service, the step down voltage for the Phase 5 microprocessor controller (computer) and the Programmable Logic Controller (PLC) is supplied from the primary side of the 24 VAC transformer. On dryers that are manufactured for 380 volts and higher, there is an additional secondary 240 VAC on the transformer that is used to supply the voltage required to operate the Phase 5 microprocessor controller (computer) and the Programmable Logic Controller (PLC) through fuse 4 (F4) and a fuse (F5) in 208/240 VAC applications.

4) 24 VAC Control Circuit

The secondary side of the 24 VAC transformer supplies 24 VAC to various control circuits through fuse 3 (F3) and a 20-amp fuse or an 8-amp fuse (fuse amperage [rating] is dependent on the voltage that the dryer was manufactured with).

IF THE SPRINKLER SYSTEM IS

The first circuit is the control voltage on/off. Control voltage ( 24 VAC) goes through the "Master Off" (normally closed) switch and supplies voltage to the "Master On" (normally open) switch. When the "Master On" switch is momentarily engaged, the master control relay (MCR) engages. This closes the MCR-A contactor (which is in parallel with the "Master On" switch) which will keep the MCR enabled. If the power is interrupted or the "Master Off" switch is pressed the MCR will disengage. The MCR-B contactor supplies power to the rest of the 24 VAC circuits.

For dryers manufactured with Automatic Doors - the purpose of the supply air is to relieve pressure

on the automatic door pistons when an emergency stop is engaged.

5) Safety Circuits

The following circuit branches are to verify various safeties, if ALL conditions are met ...

a) The first two (2) items are the Auxiliary Contact located on the blower (squirrel cage fan) motor

and the Tumbler (basket) Motor Overload. If either of these devices trip, it will open up the safety circuit thereby preventing the dryer from operating.

b) Dryer Level Switches circuit branch ...

(1) On 1-way tilt models, this switch is in series with the dry enable.

(2) On 2-way tilt models ...one (1) pole of each of the two (2) level switches (LS1-A and LS2-A)

are in series with the dryer level relay and the other pole is in series with the opposite piston. IF THE OPPOSITE SIDE IS NOT LEVEL, THE DRYER WILL NOT TILT.

c) Front Doors Closed circuit branch.

There are two (2) magnetic proximity switches mounted in the door closed position and a magnet mounted on top of the doors. When this magnet aligns with the proximity switch, the contacts in the proximity switch close. When both doors are closed, the front doors closed relay (CR2) turns on.

(1) There are two (2) sets of contacts in the relay...one (1) set of contacts are in the dry enable

circuit branch and the other set go to the PLC (Programmable Logic Controller) input front doors closed.

d) Lint Drawer Closed circuit branch ...

The lint drawer closed switch is located in the front of the dryer. When the lint drawer is closed, it closes the switch contacts, powering the lint drawer closed relay. Then, the dry enable relay will close, supplying 24 VAC to the Phase 5 microprocessor (computer) door signal. This sequence will occur only if the following conditions are met;

(1) Blower (impellor/fan) Motor Overload is not tripped. (2) Drive (tumbler/basket) Motor Overload is not tripped. (3) Dryer is level. (4) Lint Drawer is closed. (5) Doors are closed.

b. Phase 5 Microprocessor Controller (computer)

1) The Phase 5 Microprocessor Controller (computer) is powered by 240 VAC on Pin #7 and Pin #13. A jumper wire on Pin #1 to Pin #11 is required to configure the Phase 5 microprocessor (computer) for 240 VAC. The temperature sensor probe is a bullet shaped device that is located above the lint basket. This temperature probe is used to sense the temperature in the exhaust of the dryer. The temperature sensor is a two (2) terminal monolithic integrated circuit temperature transducer that provides an output current proportional to absolute temperature. The transducer acts as a high impedance temperature dependant current source of 1mA/ºK. The typical accuracy of this probe is +/- 2.7º F (+/- 1.5º C). In a case where the temperature reaches 220º F (104º C), the Phase 5 microprocessor (computer) will shut down and the L.E.D. (light emitting diode) will display "Hot." To restart a cycle the "CLEAR/STOP" button must first be pressed.

ºF =

ºC =

(ºC + 32)

(ºF - 32)

EMPERA TURE SEN SOR CURRENT

ºC + ºK (273.15)

1,000,000

MICROAMPHERES

(µA)

2) The Rotational Sensor is a magnetic proximity switch that is mounted on the side of the right hand 11-inch drive wheels. There is a magnet mounted to the side of the wheel hub. After each rotation of the wheel, the magnet passes by the proximity switch causing the contacts to close and pulse the Phase 5 microprocessor controller (computer). Whenever the magnet is over the proximity switch there should be contact closure.

3) There is an auxiliary keypad (touchpad) input to the Phase 5 microprocessor controller (computer).

A short between Pin #1 to Pin #5 of the 6-pin connector is like a "CLEAR/STOP" function on the keypad (touchpad). The PLC (Programmable Logic Controller) will trigger a clear stop whenever the dryer is in an from running a drying cycle.

a) Other functions of the 6-pin connector are as follows:

(1) A connection of Pin #1 to Pin #2 will run "A" Cycle. (2) A connection of Pin #1 to Pin #3 will run "B" Cycle. (3) A connection of Pin #1 to Pin #6 will run "C" Cycle.

b) When a drying cycle is started, the blower (fan and impellor) output (Pin #5) switches on putting

24 VAC on the blower (fan and impellor) contactor coil, which in turn pulls in the contactor starting the blower motor turning. Through the contactor relay this also triggers an input signal to the PLC (Programmable Logic Controller) disabling the tilting function. Moments later, the tumbler (basket and drum) begins to rotate because the output on Pin #3 turns on thereby pulling in the tumbler (basket and drum) forward contactor. Next, the Heat "On/Off" (Pin #4) will turn on if there is a call for heat, suppling 24 VAC to the heat circuit through the safety circuits.

unsafe operating mode, then disable the dryer's Phase 5 microprocessor (computer)

(1) The first safety circuit is the Exhaust Hi-Limit which is located on the bracket above the lint

basket with the temperature sensor. On a temperature rise of 225º F or higher, the thermal switch opens breaking the heat circuit.

(2) A second safety circuit is the Burner Hi-Limit Switch located on the side of the burner. On a

temperature rise of 330º F or higher, the thermal switch opens breaking the heat circuit, this switch must be manually reset on models manufactured as of May 26, 1998.

(3) A third safety circuit is the Sail Switch which is attached to the front of the burner box. This

device pulls in when the impellor (fan and blower) is operating correctly and verifies proper air flow.

ALL the safeties are properly maintained, 24 VAC will enable the Direct Spark Ignition (DSI) Module and a try for ignition begins. The DSI module induces a spark (at the spark electrode) and then opens (energizes) the gas valve for 8-seconds attempting to light the burner. If after 8-seconds the burner does not light, the DSI module will go into a "LOCK-OUT" Mode (the gas valve will be de-energized and the spark will be removed from the ignitor) and will not try to light the burner again until power is again cycled to the DSI module. If the spark produces a flame then a microamp signal is monitored between the flame probe and ground which in turn will keep the burner on. The Heat "On" or "Off" (Pin #4 of the Phase 5 microprocessor controller [computer]) cycles the heat unless there is a fault at a safety sensor. At the end of a cycle the air jet turns on to clean off the impellor (fan and blower), which turns on Contact Relay #4, thereby signaling an input to the PLC (Programmable Logic Controller) that the cycle is complete which then turns on a PLC output relay to turn on the "END OF CYCLE" (E.O.C.) light.

b. PLC (Programmable Logic Controller)

1) The PLC (Programmable Logic Controller) can consist of one (1) or two (2) modules; a main module and in some cases an expansion module is used for additional inputs and outputs.

NOTE: The information listed below is generic in nature, refer to blueprints for specific details.

a) The main PLC (Programmable Logic Controller) module has eight (8) input relays which are

labeled #0 through #7 and six (6) output relays labeled #200 through #205.

(1) Input Relays

Input relays #0, #1, #2, and #3 are set up as users inputs to signal what specific function is to be performed (i.e., open-close door, load-unload tilted, open doors, and level dryer). These input relays are charted as 1 and 0 ( relay or an output relay in on, the appropriate L.E.D. (light emitting diode) on the PLC will be illuminated.

For input relay #4 to turn on, the left and right front doors must be completely open. Once these doors are completely open, the jog forward (input #5) and jog reverse (input #6) can turn on through the PLC which in turn rotates the tumbler (drum and basket) through either output relay #204 or output relay #205 providing the lint door is closed. This interlock is performed through PLC input #16 (lint door closed), or in some cases contactor B is used to interrupt the 24 VAC signal from reaching the drive contactors and the tilting solenoids. Rear door open (input relay #7) is used on 2 door dryer models to verify rear door status.

1 is logic on and 0 is logic off). When either an input

(2) Output Relays

Output relay #200 controls the open front door function. When this signal is energized, the pneumatic valve opens allowing air into the two (2) door cable cylinders, which in turn opens the front doors.

Output relay #201 controls the open rear door function.

The end of cycle (E.O.C.) - output relay #202 - switches on after an air jet signal is received. This output relay will stay illuminated until the dryer is attended to.

Output relay #203 is used to signal a heater fault.

Output relay #204 (drive forward) and output relay #205 (drive reverse) are used to perform jog functions.

b) The expansion PLC (Programmable Logic Controller) module has eight (8) inputs which are

labeled #10 through #17 and an six (6) output relays labeled #210 through #215.

(1) Input Relays

A fan on or off signal (input #10) determines if the dryer is operating. If the dryer is operating, the door function and tilt function shut down.

Input #11 is the heater fault reset. When the dryer is in a heater fault, an input (at input #11) will reset the fault.

Input #12 is the heat on status. It is used to monitor the Phase 5 microprocessor controller (computer) heat output. Input #12 in conjunction with input #13 (gas valve status), the PLC (Programmable Logic Controller) will monitor for a heater fault condition.

Input #14 indicates that the drying cycle is done (air jet signal). Once the output relay of the Phase 5 microprocessor controller (computer) turns on contact relay #4, input #14 is turned on. This in turn signals the PLC to illuminate the "END OF CYCLE" (E.O.C.) L.E.D. (light emitting diode) until the dryer is attended to.

Front door closed (input #15) is a safety circuit used to lock out the Phase 5 microprocessor controller (computer) from a drying cycle unless the doors are closed.

Lint door closed (input #16) monitors/verifies that the lint door is closed.

The front down/rear down/dryer level (input #17) is another safety device used so that a drying cycle

(2) Output Relays

Output relay #210 controls the air supply to the top of the pneumatic piston to tilt the front of the dryer down.

cannot be initiated unless the dryer is in the level position.

Output relay #211 controls the air supply to the bottom of the pneumatic pistons to tilt the front of the dryer up, provided that the rear of the dryer is in the level position.

Output relay #212 is used to turn on the fan and cool the load after a heater fault.

Output relay #213 controls the air supply to the top of the pneumatic pistons to tilt the rear of the dryer down.

Output relay #214 controls the air supply to the bottom of the pneumatic pistons to tilt the rear

of the dryer. Rear up (output relay #214) applies power to the S6 rear up solenoid through the front down level switch (LS1B).

The dryer "CLEAR/STOP" output (relay #215) is used to lock out the Phase 5 microprocessor (computer) from running a drying cycle. If the PLC (Programmable Logic Controller) has input #4 (front door open) and input #10 (blower [squirrel cage fan] on), or input #7 (lint door closed), input #15 (front door closed), or input #17 (dryer level) are off, then the PLC will close output relay #215 (dryer "CLEAR/STOP") so that a drying cycle cannot be initiated.

2. Electrical Component Replacement

a. Control Voltage Transformer (refer to the illustration on page 92) Replacement

1) Discontinue electrical service to the dryer.

2) Locate the correct schematic for the specific change(s) required and verify the wiring of the transformer using the schematic.

3) Verify the voltage of the new transformer.

4) Loosen and then remove the four (4) wires for a 208-230/240 VAC dryer or the six (6) wires for a 380 VAC (and higher) dryer from terminal block #3 (TB3).

5) Remove the four (4) screws securing the transformer, then remove the transformer itself.

6) To install new transformer reverse above procedure.

7) Reestablish electrical service to the dryer.

b. PLC (Programmable Logic Controller) Replacement

1) Discontinue electrical service to the dryer.

If there is an expansion module along side the main module carefully disconnect the ribbon cable connecting the two (2) units together .

2) Mark and identify the wires that will be removed for proper reinstallation.

3) To remove the Programmable Logic Controller (PLC) from the mounting rail, using a screwdriver, very carefully pull out the mounting clip on the bottom of the PLC and lift the unit out of the rail.

4) To replace the Programmable Logic Controller (PLC), push in the top of the PLC into the rail and then snap in the bottom of the unit.

MAN3405

5) Replace the wires removed in Step #2.

If there was an expansion module along side the main module carefully reconnect the ribbon cable.

6) Reestablish electrical service to the dryer.

c. Relay Replacement

1) Discontinue electrical service to the dryer.

2) Remove hold down spring.

3) Remove relay from relay socket.

4) To install new relay, reverse above procedure.

d. Phase 5 Microprocessor Controller (computer) Replacement

1) Discontinue electrical service to the dryer.

2) Carefully unplug the 15-pin connector, the 6-pin connector, and the keypad (touchpad) connector .

3) Disconnect the "GRD" connector and the air jet spade connector.

Disconnect optional Battery backup (if applicable).

4) Loosen and remove the two (2) screws securing the Phase 5 microprocessor (computer) and then remove the computer from the door.

5) To install new Phase 5 microprocessor (computer), reverse above procedure.

e. Keypad (touchpad) Replacement

1) Discontinue electrical service to the dryer.

2) Peel existing keypad (touchpad) from the door.

3) Remove as much of the remaining adhesive (from the removed keypad [touchpad] as possible.

4) Install and adhere new keypad (touchpad).

5) Reestablish electrical service to the dryer.

f. Switch Replacement

1) Discontinue electrical service to the dryer.

2) Mark and identify the wires that will be removed for proper reinstallation.

3) Remove wires.

4) To remove a contact block, loosen and remove the mounting screw.

NOTE: Contact Block #1 and Contact Block #2 is normally closed (N.C.) while Contact Block #3

and Contact Block #4 is normally open (N.O.).

5) To remove or replace operator, loosen the two (2) screws that hold the switch body away from the door.

6) Quarter turn the operator (in the direction shown in the above illustration) and remove.

7) Reinstall the wires removed in Step #3.

8) Reestablish electrical service to the dryer.

g. Switch Bulb Replacement

1) Discontinue electrical service to the dryer.

2) Unscrew clear lens shield.

3) Unscrew colored lens.

4) Remove diffuser.

5) With finger tip, gently push and turn the bulb to unlock.

NOTE: A piece of tubing with an inside diameter the size of bulb may assist in bulb removal and

replacement.

6) To install new bulb, reverse Step #5 through Step #1.

h. End of Cycle Light Replacement

1) Discontinue electrical service to the dryer.

2) Loosen and remove the cap screw on the top of the cap.

3) Remove the cap.

4) Loosen and remove the screw going into the lens.

5) Twist out lens and remove bulb/light.

6) To install new bulb, reverse above procedure

i. Tilt Switch Replacement

1) Discontinue electrical service to the dryer.

2) Remove the base panel from the left hand side of the dryer.

CAUTION: DO NOT PLACE HANDS BETWEEN THE DRYER BASE AND THE

TUMBLER (Basket/Drum) SECTION. SERIOUS INJURY CAN RESULT.

3) Unscrew tilt switch.

4) Loosen and remove the two (2) screws securing the junction cover.

5) Remove the junction cover.

6) Loosen and remove the two (2) mounting screws.

7) Loosen and remove cord grip cap.

8) Remove cord grip.

9) Place pivot arm in the 1 o'clock position for the front tilt switch and in the 11 o'clock position for the rear tilt switch

Verify that the body orientation and the head orientation are correct.

Verify that the tilt switch arm is not in the vertical position or will result.

damage

10) Holding the tilt arm, tighten up (snug up) on the nut.

11) Hold pivot point with a screwdriver and tighten the nut.

12) Replace base panel.

13) Reestablish power to the dryer.

j. Tilt Switch Adjustment

1) Discontinue electrical service to the dryer.

2) Remove the base panel from the left hand side of the dryer.

CAUTION: DO NOT PLACE HANDS BETWEEN THE DRYER BASE AND TUMBLER

(Basket) SECTION. SERIOUS INJURY CAN RESULT.

3) To adjust the pivot arm; hold the arm and with a #10 metric wrench and loosen the nut.

4) Place pivot arm in the one o'clock position for the front tilt switch and in the 11 o'clock position for the rear tilt switch.

Verify that the tilt switch arm is not in the vertical position or damage will result.

5) Holding the tilt arm, tighten up (snug up) on the nut.

6) Hold pivot point with a screwdriver and tighten the nut.

7) Replace base panel.

8) Reestablish electrical service to the dryer.

L. TUMBLER (Basket) SYSTEM

1. Tumbler Drive System

The tumbler (basket) is supported and driven by four (4) 11-inch diameter drive wheel assemblies. Two (2) of these wheels are attached to a 1-1/2" diameter idler shaft, while the other two (2) are attached to a 1-1/2" diameter drive shaft. Each of the wheels is fastened to the shafts by a trantorque keyless locking bushing. The trantorque is made up of three (3) pieces; an inner collar, an outer sleeve, and a locking nut. The inner and outer elements have matching opposing tapers. As a result, when the nut is tightened, the trantorque contracts onto the shaft and expands into the drive wheel hub locking the wheel on to the shaft. required.

The idler shaft and drive shaft are each supported by two (2) 1-1/2" diameter pillow block bearings. These bearings sit on slotted support channels and can be moved inward or outward by the adjustment bolts. This results in raising or lowering the tumbler (basket).

The drive system consists of a shaft mounted gear reducer, two (2) V-belts, and a 5 HP drive motor. Belt tension can be adjusted by tightening or loosening the gear reducer turnbuckle.

T o keep the tumbler (basket) in the middle of the dryer a series of retaining wheels are used in the front and rear of the dryer. The retaining wheels run along the vertical edge of the tumbler (basket) rings. These keep the tumbler from rubbing on the front and rear panels of the dryer.

No key is

TUMBLER DRIVE SYSTEM

MAN2346

ADC AD-310 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual