American Dryer Corp ADG-320D User Manual

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ADG-320DandADG-330D

24 VAC Phase 5

Dual Microprocessor Controller (DMC)

Mechanical/Electrical

Service Procedures

American Dryer Corporation

88 Currant Road

Fall River, MA02720-4781

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

e-mail: techsupport@amdry.com

www.amdry.com

062094

ADC Part No. 450303

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 manual included with the dryer.

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

FOR YOUR SAFETY

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

POUR VOTRE SÉCURITÉ

Ne pas entreposer ni utiliser d’essence ni d’autres vapeurs ou liquides inflammables à proximité de cet appareil ou de tout autre appareil.

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.

Important

For your convenience, log the following information:

DATE OF PURCHASE ____________________________ MODEL NO. __________________________________________

RESELLER’S NAME

_______________________________________________________________________________________

Serial Number(s)

________________________________________________________________________________________

 

________________________________________________________________________________________

 

________________________________________________________________________________________

Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement parts from the factory, you can FAX your order toADC at (508)678-9447or telephone your order directly to theADC Parts Department at (508)678-9000.Please specify the dryermodel number andserial number in addition to thedescription andpart 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 instructionsmust 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.

FOR YOUR SAFETY

DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE.

DO NOT DRY MOP HEADS IN THE DRYER.

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

CAUTION

DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.

WARNING

CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYERS.

CHILDREN SHOULD BE SUPERVISED IF NEAR DRYER(S) IN OPERATION.

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 OR SCREEN IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.

IMPORTANT

PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and specified in the installation manual included with the dryer.

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

 

Table of Contents

 

SECTION I

 

ROUTINE MAINTENANCE ....................................................................................

3

A. Cleaning .....................................................................................................................................

3

B. Adjustments ...............................................................................................................................

4

C. Lubrication .................................................................................................................................

4

SECTION II

 

MECHANICAL ...........................................................................................................

5

A. To Remove Lint Drawer .............................................................................................................

5

B. To Remove Control (Middle) or Lint (Lower) Door ....................................................................

5

C. To Remove Gas Valve TrainAssembly ........................................................................................

5

D. To Remove Control Box .............................................................................................................

6

E. To Remove Front Panel ..............................................................................................................

6

F.

To Remove/Replace Lint Drawer SwitchAssembly .....................................................................

7

G.

To Remove/Replace Sensor Bracket and/or Its Components .......................................................

7

H.

To Remove/Replace Belt ............................................................................................................

8

I.

To Remove/Replace Motor .........................................................................................................

9

J.

To Remove/Replace Impellor (Fan/Blower) ...............................................................................

11

K.

Belt/IdlerTensionAdjustment ....................................................................................................

12

L.

To Remove Dual Microprocessor Controller (DMC) Computer PanelAssembly ........................

13

M.

To Replace DMC Computer .....................................................................................................

13

N.

To Replace Keyboard (Touch Pad) ...........................................................................................

14

O.

To Replace Coin Acceptor ........................................................................................................

15

P.

To Replace Either Motor Relay .................................................................................................

15

Q.

Basket (Tumbler)Alignment (Vertical) .......................................................................................

16

R.

Basket (Tumbler)Alignment (Lateral) ........................................................................................

16

S.

To Replace Basket (Tumbler) and/or Basket (Tumbler) Support ................................................

18

T.

To Replace Basket (Tumbler) Support Pillow Block Bearing ......................................................

19

U.

To Replace Basket (Tumbler) Support Flange Bearing ...............................................................

19

V.

To Replace 330º (Burner) Hi-Limit Switch (Thermostat) ............................................................

21

W.

To Replace Sail Switch .............................................................................................................

21

X.

To Replace Main Door Switch ..................................................................................................

22

Y.

To Replace Direct Spark Ignition (DSI) Module ........................................................................

22

Z.

To Replace Ignitor/ProbeAssembly ..........................................................................................

23

AA. To Replace Gas Valve ............................................................................................................

23

BB. To Convert Dryer From Natural Gas to Liquid Propane (L.P.) Gas .........................................

24

CC. To Replace Coin Vault ...........................................................................................................

25

DD. To Remove Main Door ..........................................................................................................

25

EE.

To Install New Main Door Glass ............................................................................................

26

FF.

To Replace Main Door Gasket ..............................................................................................

26

GG.

To Replace Main Door Hinge ................................................................................................

26

SECTION III

 

TROUBLESHOOTING ...........................................................................................

28

SECTION IV

 

ELECTRICAL TROUBLESHOOTING................................................................

36

SECTION V

 

DATA LABEL INFORMATION .............................................................................

41

A. Data Label ...............................................................................................................................

41

B. Testing andAdjusting Gas Pressure ...........................................................................................

43

C. L.E.D. Display Codes ...............................................................................................................

44

SECTION VI

 

PHASE 5 DUAL MICROPROCESSOR CONTROLLER (DMC) SYSTEM

 

DIAGNOSTICS .........................................................................................................

45

A. Diagnostic (L.E.D. Display) Failure Codes ................................................................................

45

B. L.E.D. Display Indicators (Dots) ...............................................................................................

46

C. Phase 5 DMC Computer Relay Output L.E.D. Indicators ..........................................................

46

D. Phase 5 DMC Computer Input/Output L.E.D. Indicators ..........................................................

47

SECTION VII

 

PHASE 5 DUAL MICROPROCESSOR CONTROLLER (DMC)

 

PROGRAMMING LIMITS .....................................................................................

48

SECTION I

ROUTINE MAINTENANCE

A. CLEANING

A program and/or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the ductwork 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 airflow. If the guidelines in this section are met, anADC dryer will provide many years of efficient, trouble free and most importantly safe operation.

WARNING: LINT FROM MOST FABRICS IS HIGHLY COMBUSTIBLE. THE ACCUMULATION OFLINT CAN CREATEAPOTENTIALFIRE HAZARD.

WARNING: KEEP DRYER AREA CLEAR AND FREE FROM COMBUSTIBLE MATERIALS, GASOLINE, AND OTHER FLAMMABLE VAPORS AND LIQUIDS.

NOTE: Suggested time intervals shown are for average usage, which is considered six (6) to eight (8) operational (running) hours per day.

DAILY (beginning of each work shift)

Clean lint from baskets (tumblers).

Inspect lint screen(s) and drawer(s) for damage and replace if torn.

WEEKLY

Clean lint accumulation from around microprocessor temperature sensor probes and sensor bracket assemblies.

90 DAYS

Remove lint from air vents and surrounding area.

IMPORTANT: Lint accumulation will restrict the airflow over the motor(s), causing overheating and irreparable motor damage. Motor failure due to lint accumulation willVOID THE WARRANTY.

3

Remove lint accumulation from around the openings in the dryer’s back panels.

Remove lint from gas valve burner train area with a dusting brush or vacuum cleaner attachment. Remove any lint accumulation from coin acceptor area, including the optical switch.

Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from the dryer’s internal exhaust ducting.

WARNING: THEACCUMULATION OF LINT IN THE EXHAUST DUCTWORK CAN CREATEAPOTENTIALFIRE HAZARD.

Clean the steam coil fins (or filters). 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 local air conditioning supply houses.

6 MONTHS

In the cleaning of the dryer’s cabinet, avoid using harsh abrasives. A product for the cleaning of appliances is recommended.

ALL bearings and setscrewsshould be checked to insure that they are tight.

B. ADJUSTMENTS

7 DAYS AFTER INSTALLATION AND EVERY 6 MONTHS THEREAFTER

Inspect bolts, nuts, screws (bearing setscrews), grounding connections, nonpermanent gas connections, (unions, shutoff valves, and orifices) and electrical terminations. The 12-Rib95” (J) poly belt arrangementshould be examined. A cracked or seriously frayed belt(s)should be replaced. Tighten loose belt(s) when necessary and check the alignment. Complete operational check of controls and valves. Complete operational check ofALL safety devices (door switches, lint compartment switches, sail switches, and burner andhi-limitthermostats).

C. LUBRICATION

The motor bearings, idler bearings, and basket (tumbler) bearings are permanently lubricated. No lubrication is necessary.

4

SECTION II

MECHANICAL

A. TO REMOVE LINT DRAWER

1.Pull out lint drawer 3/4’s of the way (approximately 20 inches [50.8 cm]).

2.Reach up into the back of the lint drawer and pull down the retainer (hinge) that is attached to the top of the lint drawer.

3.The lint drawer can now be removed.

4.Reverse procedure for reinstalling the lint drawer.

B. TO REMOVE CONTROL (MIDDLE) OR LINT (LOWER) DOOR

1.Pull out lint drawer 3/4’s of the way (approximately 20-inches[50.8 cm]). Reach into the back of the lint drawer and push down the retainer (hinge) that is attached to the top of the lint drawer.

2.Pull out the lint drawer.

3.Open the control/lint door; two (2) 1/4 turn locks, one (1) on each side.

4.Remove the control/lint door.

5.Reverse procedure to reinstall the control/lint door.

C. TO REMOVE GAS VALVE TRAIN ASSEMBLY

1.Discontinue power to the dryer.

2.Close ALL gas shutoff valves in the gas supply line to the dryer.

3.Remove the lint drawer and the control/lint door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures inSection A andSection B).

4.Close the union shutoff valve at inlet area of the gas valve.

5.Loosen the union shutoff valve collar nut ALL the way.

6.Pull out gas valve train assembly 1/4 of the way. Disconnect the gas valve harness power connector at the top of the assembly.

7.Gently pull/remove the gas valve train assembly.

5

IMPORTANT: When removing the gas valve train assembly, be careful not to snag or damage the gas valve train wiring disconnected inStep #6.

8. Reverse procedure to reinstall the gas valve train assembly.

NOTE: Be sure to openALL gas shutoff valves closed prior to removing the gas valve train assembly.

9. Reestablish power to the dryer.

D. TO REMOVE CONTROL BOX

1.Discontinue power to the dryer.

2.Remove the lint drawer and the control door from the dryer (follow Lint Drawer and Control/Lint Door Removal Procedures inSection A andSection B).

3.Remove screw located on the bottom right hand corner of the control panel.

4.Slide out the control box and hang the control box assembly on hinges located on the right side panel, and disconnect the three (3) wiring harnesses (connectors) at the back of the control box.

5.The control box may now be taken out of the dryer completely. Depending on the service function to be performed, the control box can be attached to the two (2) female hinges on the right side of the dryer cabinet.

NOTE: If the control box is attached to the dryer cabinet, the three (3) wiring harnesses mentioned inStep #4 DO NOT need to be disconnected.

6.Reverse procedure to reinstall the control box assembly.

7.Reestablish power to the dryer.

E. TO REMOVE FRONT PANEL

1.Discontinue power to the dryer.

2.Remove the control box assembly (follow Control Box Removal Procedure inSection D).

3.If the bottom front panel is being removed, the lower lint door must also be removed.

4.Disconnect the door switch connector from the lint drawer switch box assembly located under the basket (tumbler) on the right side.

NOTE: There are two (2) harnesses that connect to lint drawer switch box. Locate and disconnect the one that leads to the front panel.

6