Page 1
AD-75
(DSI Gas/Electric/Steam)
Installation/Operator’s Manual
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 death.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any
other appliance.
WHAT DO YOU DO IF YOU SMELL GAS
* Do not try to light any appliance.
* Do not touch any electrical switch; do not use
any phone in your building.
* Clear the room, building or area of all
occupants.
* Immediately call your gas supplier from a
neighbor's phone. Follow the gas supplier's
instructions.
* If you cannot reach your gas supplier, call the
fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
AVERTISSEMENT: Assurez-vous de bien
suivre les instructions données dans cette
notice pour réduire au minimum le risque
dincendie ou dexplosion ou pour éviter tout
dommage matériel, toute blessure ou la mort.
Ne pas entreposer ni utiliser dessence ni
dautres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
* Ne pas tenter dallumer dappareil.
* Ne touchez à aucun interrupteur. Ne pas
vous servir des téléphones se trouvant dans
le bâtiment où vous vous trouvez..
* Évacuez la pièce, le bâtiment ou la zone.
* Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
* Si vous ne pouvez rejoindre le fournisseur
de gaz, appelez le service des incendies.
Linstallation et lentretien doivent être assurés
par un installateur ou un service dentretien
qualifié ou par le fournisseur de gaz.
020698JEV/tf
For replacement parts, contact the distributor from which the dryer
was purchased or
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. 113035
Page 2
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 dessence
ni dautres 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 PURCHAS E MODEL NO.
DISTRI BUTORS NAM E
Serial Number(s)
AD-75
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.
Page 3
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 dentretien
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
DRYER(S) 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 DRYER(S) 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.
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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/operator's manual included with the dryer.
Dryer(s) must not be installed or stored in an area where it will be exposed to water and/or
weather.
The wiring diagram for the dryer is located in the front electrical control box area.
Page 5
Table of Contents
SECTION I
IMPORTANT INFORMATION ............................................................................... 3
RECEIVING and HANDLING ..................................................................................... 3
SAFETY PRECAUTIONS ........................................................................................... 4
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION .................................... 6
SPECIFICATIONS ....................................................................................................... 6
COMPONENT IDENTIFICATION.............................................................................. 8
SECTION III
INSTALLATION PROCEDURES ......................................................................... 10
LOCATION REQUIREMENTS ................................................................................. 10
UNPACKING/SETTING UP ...................................................................................... 11
DRYER ENCLOSURE REQUIREMENTS ............................................................... 12
FRESH AIR SUPPLY ................................................................................................. 13
EXHAUST REQUIREMENTS .................................................................................. 14
ELECTRICAL INFORMATION ................................................................................ 19
GAS INFORMATION ................................................................................................ 27
STEAM INFORMATION ........................................................................................... 30
PREPARATION FOR OPERATION/START-UP ..................................................... 36
PREOPERATIONAL TESTS ..................................................................................... 37
PREOPERATIONAL INSTRUCTIONS.................................................................... 39
SHUT DOWN INSTRUCTIONS ............................................................................... 40
SECTION IV
SERVICE/PARTS INFORMATION ...................................................................... 41
SERVICE ..................................................................................................................... 41
PARTS ......................................................................................................................... 41
SECTION V
WARRANTY INFORMATION .............................................................................. 42
RETURNING WARRANTY CARD(S) ..................................................................... 42
PARTS ......................................................................................................................... 42
RETURNING WARRANTY PARTS ......................................................................... 42
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SECTION VI
ROUTINE MAINTENANCE .................................................................................. 44
CLEANING ................................................................................................................. 44
ADJUSTMENTS ......................................................................................................... 46
SECTION VII
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS ....................................................................................................... 47
MICROPROCESSOR.......................................................................................... 47
DIRECT SPARK IGNITION (D.S.I.) SYSTEM.....................................................48
SECTION VIII
REVERSING SPIN/DWELL ADJUSTMENTS .................................................. 49
SECTION IX
TECHNICAL INFORMATION (DATA LABEL) ................................................ 50
SECTION X
TROUBLESHOOTING ........................................................................................... 52
Page 7
SECTION I
IMPORTANT INFORMATION
A. RECEIVING and HANDLING
The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover (or
optional box) as a means of preventing damage in transit. Upon delivery, the dryer and/or packaging, and wooden
skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect further
before delivering carrier leaves.
Dryers damaged in shipment.
1. ALL dryers should be inspected upon receipt and before they are signed for.
2. If there is suspected damage or actual damage, the trucker's receipt should be so noted.
3. If the dryer is damaged beyond repair, it should be refused. Those dryers which were not damaged in a
damaged shipment should be accepted, but the number received and the number refused must be noted
on the receipt.
4. If you determine that the dryer was damaged after the trucker has left your location, you should call the
delivering carrier's freight terminal immediately and file a claim. The freight company considers this
concealed damage. This type of freight claim is very difficult to get paid and becomes extremely difficult
when more than a day or two passes after the freight was delivered. It is your responsibility to file freight
claims. Dryer/parts damaged in transit cannot be claimed under warranty.
5. Freight claims are the responsibility of the consignee, and ALL claims must be filed at the receiving end.
ADC assumes no responsibility for freight claims or damages.
6. If you need assistance in handling the situation, please contact the ADC Traffic Manager at (508) 678-9000.
IMPORTANT: The tumbler section of the dryer must be transported and handled in an
upright position at all times.
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Page 8
B. SAFETY PRECAUTIONS
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 ALL occupants.
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.
WARNING: DO NOT dry rags or articles coated or contaminated with gasoline,
kerosene, oil, paint, wax. EXPLOSION COULD RESULT.
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents
will create a fire hazard.
WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge
rubber, or similarly textured rubber materials. Drying in a heated basket
(tumbler) may damage plastics or rubber and also may be a fire hazard.
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Page 9
7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust duct
work, and inside 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 door switch, 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. DO NOT operate steam dryers with more than 125 PSI steam pressure. Excessive steam pressure can
damage steam coil and/or harm personnel.
13. Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with leaking
flexible hoses. PERSONAL INJURY MAY RESULT.
14. 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.
15. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.
WARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY
and THE GAS 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.
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Page 10
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. SPECIFICATIONS
SECTION II
0$;,080&$3$&,7<'U\:HLJKW OEV
%$6.(7',$0(7(5
%$6.(7'(37+
02725+RUVHSRZHU +3
'22523(1,1*'LDPHWHU
%$6.(792/80( FXIW
'5<(563(5& 217 $,1(5
'5<(563(5758&.
92/7$*($9$,/$%/( Y+]
$3352;:(,*+78QFUDWHG OEV
$3352;:(,*+7&UDWHG OEV
+($7,1387 EWXK
Gas
$,5)/2: FIP
,1/(73,3(&211(&7,21 )37
29(16,=(
.:
.:
Electric
92/7$*($9$,/$%/( Y+]
$3352;:(,*+78QFUDWHG OEV
$3352;:(,*+7&UDWHG OEV
$,5)/2: FIP
&2035(66('$,5 92/80( FIK
$,5&211(&7,21 )37
67($0 &21680 37,21
Steam****
23(5$7,1*67($035(6685(
* For non-reversing models.
** A minimum of 3/4" pipe must be supplied to the gas inlet for each dryer.
*** Contact factory for electrical information not listed. 3-Phase figures shown are for 3-wire service.
**** Steam unit must be supplied with clean, dry, regulated air at 80 psi (+/- 10 psi).
***** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
APPROXIMATE AMP DRAW
OEVKU
SVLPD[
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$33/,('92/7$*(3+$6(
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FP
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FPP
FPK
5(7851
&211(&7,21
Shaded areas are stated in metric equivalents.
NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT
ANY TIME, WITHOUT NOTICE or OBLIGATION.
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Specifications
ADG-75D (Gas)
ADE-75 (Electric)
ADS-75 (Steam)
NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT
ANY TIME, WITHOUT NOTICE or OBLIGATION.
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B. COMPONENT IDENTIFICA TION
1. DRYER FRONT VIEW
Illus. No. Description
1 Controls
2 Control (top access) Door Assembly
3 Main Door Assembly
4 Lint Compartment Area (lint screen located behind door)
5 Data Label and Installation Label (located behind control [service] door)
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2. DRYER REAR VIEW
Illus. No. Description
1 Heating Unit
2 1/8" Compressed Air Supply Inlet
(behind Electric Service Relay Box for steam units ONLY)
3* Electric Service Relay Box
4 Tumbler Bearing Mount Assembly
5 Idler Bearing Mount Assembly
6 Blower Motor Assembly
7 Leveling Leg (rear)
8 Basket (Drive) Motor Assembly (Reversing Models ONLY)
9 Dryer Exhaust
* Electric service connections for Gas & Steam Models are made in this box.
NOTE: 1/8-inch Compressed Air Supply Inlet (for Steam Models ONL Y) is located
behind the Electric Service Relay Box.
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SECTION III
INSTALLATION PROCEDURES
Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the 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. LOCATION REQUIREMENTS
Before installing the dryer, be sure the location conforms to local codes and ordinances. In the absence of such
codes or ordinances the location must conform with the National Fuel Gas Code ANSI.Z223.1-LATEST EDITION.
1. The dryer must be installed on a sound level floor capable of supporting its weight. It is
recommended that carpeting be removed from the floor area that the dryer is to rest on.
2. The dryer must not be installed or stored in an area where it will be exposed to water and/or
weather.
3. The dryer is for use in noncombustible locations.
4. Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air
Supply in Section D).
5. Clearance provisions must be made from combustible construction as noted in this manual
(refer to Dryer Enclosure Requirements in Section C).
6. Provisions must be made for adequate clearances for servicing and for operation as noted in this
manual (refer to Dryer Enclosure Requirements in Section C).
7. Dryer must be exhausted to the outdoors (refer to Exhaust Requirements in Section E).
8. Dryer must be located in an area where correct exhaust venting can be achieved as noted in the
manual (refer to Exhaust Requirements in Section E).
IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will
be necessary.
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B. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap, and/or optional shipping box) from dryer.
IMPORTANT: Dryer must be transported and handled in an upright position at all
times.
The dryer can be moved to its final location while still attached to the skid or with the skid
removed. To un-skid the dryer, locate and remove the four (4) bolts securing the base of the dryer to the wooden
skid. Two (2) are at the rear base (remove the back panel for access), and two (2) are located in the bottom of
the lint chamber. To remove the two (2) bolts located in the lint chamber area, remove the lint door.
With the skid removed, to make it easier to slide the dryer into its final position, slightly lower ALL four (4)
leveling legs, so that the dryer will slide on the legs instead of the base frame.
To increase bearing life and improve efficiency, the dryer should be tilted slightly to the rear.
The basket (tumbler) is supported during shipping by a wooden block. REMOVE THIS BLOCK BEFORE
STARTING THE DRYER.
IMPORTANT: For microprocessor (computer) models, this wooden block must be
removed before connecting power to the dryer or irreparable damage
to the basket (tumbler) will result.
The lint coops of ALL AD-75 dryers are supported during shipping by a bracket. REMOVE THIS BRACKET
BEFORE STARTING THE DRYER.
1.
LEVELING DRYER
The dryer is equipped with four (4) leveling legs, one at each corner of the base. Two (2) are
located at the rear of the dryer base, and two (2) are located in the lint chamber (coop).
To increase bearing life and improve efficiency, the dryer should be tilted slightly to the rear .
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C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a
minimum of twelve (12) inches (18-inches or more is recommended for ease of installation,
maintenance , and service) above the dryer outer top, except along the front of the dryer which may be partially
closed in if desired. The clearance between the bulkhead header and the dryer must be a minimum of four (4)
inches and must not extend more than four (4) inches to the rear of the front. The bulkhead facing must not be
closed in all the way to the top of the dryer . A one (1) inch clearance is required.
NOTE: Allowances must be made for opening the control door .
Dryers may be positioned side wall to side wall. However , a 1/16" minimum allowance must be made for
opening and closing of the control door and the lint door . It is suggested that the dryer be positioned about two (2)
feet away from the nearest obstruction for ease of installation, maintenance, and service (to be measured from
the back guard.) (Refer to the illustration above for details.)
NOTE: Air considerations are important for proper and efficient operation.
IMPORT ANT: Even though a minimum of only 12-inches is required, 18-inches or more
is suggested. The additional clearance is advantageous for ease of
installation and service.
IMPORT ANT: When fire sprinkler systems are located above the dryers, a minimum of
18-inches above the dryer console (module) is required. Dryers may be
positioned side wall to side wall however, a 1/16-inch minimum
allowance is required between dryers (or wall) for ease of installation and
maintenance. Allowances must be made for the opening and closings of
the control door and the lint door .
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D. FRESH AIR SUPPLY
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 may result, as well as premature motor failure
from overheating.
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer.
An unrestricted source of air is necessary for each dryer. An air flow of 1,200 cfm (cubic feet per minute)
must be supplied to each gas and electric dryer and 1,350 cfm (cubic feet per minute) must be supplied to
each steam dryer. As a general rule, an unrestricted air entrance from the outdoors (atmosphere) of a
minimum of 1-1/2 square feet is required for each dryer.
To compensate for the use of registers or louvers used over the openings, this make-up air must be
increased by approximately thirty-three percent (33%). Make-up air openings should not be located in an
area directly near where exhaust vents exit the building.
It is not necessary to have a separate make-up air opening for each dryer. Common make-up air openings
are acceptable. However, they must be set up in such a manner that the make-up air is distributed equally
to ALL the dryers.
EXAMPLE: For a bank of four (4) dryers, two (2) unrestricted openings measuring 2 feet by
1-1/2 feet (6 square feet) is acceptable.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive altitudes or predominantly low pressure areas.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent
fumes. Make-up air that is contaminated by dry cleaning solvent fumes
will result in irreparable damage to motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY .
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E. EXHAUST REQUIREMENTS
1. General Exhaust Duct W ork Information
Exhaust duct work should be designed and installed by a qualified professional. Improperly
sized duct work will create excessive back pressure which results in slow drying, increased use
of energy, overheating of the dryer, and shutdown of the burner by the airflow (sail) switches,
burner hi-limits, or basket (tumbler) hi-heat thermostats.
CAUTION: DRYER MUST BE EXHAUSTED T O THE OUTDOORS.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
The duct work should be laid out in such a way that the duct work travels as directly as
possible to the outdoors with as few turns as possible. Single or independent dryer venting is
recommended.
Horizontal V enting:
When single dryer venting is used, the length of duct work, from the dryer to the outside exhaust outlet,
should not exceed fifteen (15) feet. The minimum diameter of this duct work must be at least 10-inches (even
though the dryer exhaust duct for gas and electric units is only 8-inches). In the case of multiple (common) dryer
venting, the distance from the last dryer to the outside exhaust outlet should not exceed fifteen (15) feet. The
shape of the duct work is not critical so long as the minimum cross-sectional area is provided. It is suggested that
the use of 90° turns
be 1-1/2 times the diameter of the duct. Including basket (tumbler)/dryer elbow connections or elbows used for
outside protection from the weather , no more than two (2) elbows should be used in the exhaust duct run. If
more than two (2) elbows are used, the cross sectional area of the duct work must be increased. ALL duct
work should be smooth inside with no projections from sheet metal screws or other obstructions which will
collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be connected. ALL
duct work joints must be taped to prevent moisture and lint from escaping into the building. Inspection doors
should be installed at strategic points in the exhaust duct work for periodic inspection and clean-out of lint from
the duct work.
be avoided; use 30° and/or 45° angles instead. The radius of the elbows should preferably
V ertical Venting:
When single dryer venting is used the length of the duct work from the dryer to the outside
exhaust outlet should not exceed twenty (20) feet. The minimum diameter of this duct work must be at least
12-inches (even though the dryer exhaust duct for gas and electric units is only 8-inches) In the case of multiple
(common) dryer venting, the distance from the last dryer to the outside exhaust outlet should not exceed twenty
(20) feet. The shape of the duct work is not so critical so long as the minimum cross sectional area is provided. It
is suggested that the use of 90º turns be avoided; use 30º and/or 45º bends instead.. The radius of the elbows
should preferably be 1-1/2 times the diameter of the duct. ALL duct work should be smooth inside with no
projections from sheet metal screws or other obstructions which will collect lint. When adding ducts, the duct to
be added should overlap the duct to which it is to be connected. ALL duct work joints must be taped to prevent
moisture and lint from escaping into the building. Inspection doors should be installed at strategic points in the
exhaust duct work for periodic inspection and clean-out of lint from the duct work.
IMPORT ANT: Exhaust back pressure measured by a manometer in the exhaust duct
should not exceed 0.3-inches of water column.
IMPORT ANT: Minimum duct work diameter for horizontal venting is 10-inches and for
vertical venting the minimum is 12-inches..
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NOTE: Where the exhaust duct work passes through a wall, ceiling, or roof made of
combustible materials, the opening must be 2-inches larger (all the way around)
than the duct. The duct must be centered within this opening.
a. Outside Duct W ork Protection
1) To protect the outside end of horizontal duct work from the weather, a 90° elbow bent
downward should be installed where the exhaust exits the building. If the duct work
travels vertically up through the roof, it should be protected from the weather by using
a 180° turn to point the opening downward. In either case, allow at least twice the diameter
of the duct between the duct opening and the nearest obstruction.
IMPORT ANT: DO NOT use screens or caps on the outside of opening of exhaust duct
work.
2. Single Dryer V enting
Where possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust
duct should be laid out in such a way that the duct work travels as directly as possible to the
outdoors with as few turns as possible. It is suggested that the use of 90° turns in the ducting be
avoided; use 30° and/or 45° angles instead. The shape of the exhaust duct work is not critical so
long as the minimum cross section area is provided.
IMPORT ANT: Minimum duct size for a dryer that is vented horizontally is 10-inches for
a round duct or an equivalent of 80 square inches. The DUCT SIZE MUST NOT
BE REDUCED ANYWHERE DOWN STREAM OF THE DRYER
IMPORT ANT: Exhaust back pressure measured by a manometer at each basket
(tumbler) exhaust duct area should not exceed 0.3-inches of water column.
IMPORT ANT: Minimum duct size for a dryer that is vented vertically is 12-inches for a
round duct or an equivalent of 120 square inches. The DUCT SIZE MUST NOT
BE REDUCED ANYWHERE DOWN STREAM OF THE DRYER.
15
Page 20
IMPOR T ANT: For extended duct work runs, the cross section area of the duct work can only be
increased to an extent. When the duct work approaches the maximum limits noted in
this manual, a professional heating venting air conditioning (HV AC) firm should be
consulted for proper venting information.
ALL duct work should be smooth inside with no projections from sheet metal screws or other
obstructions which will collect lint. When adding ducts, the duct to be added should overlap
the duct to which it is to be connected.
moisture and lint from escaping into the building. Inspection doors should be installed at
strategic points in the exhaust duct work for periodic inspection and clean-out of lint from the
duct work.
ALL duct work joints must be taped to prevent
NOTE: Where the exhaust duct passes through a wall, ceiling, or roof made of combustible materials,
the opening must be 2-inches larger (all the way around) than the duct. The duct must be
centered within this opening.
a. Outside Duct W ork Protection
1) To protect the outside end of horizontal duct work from the weather, a 90° elbow bent
downward should be installed where the exhaust exits the building. If the duct work travels
vertically up through the roof, it should be protected from the weather by using a 180° turn to point
the opening downward. In either case, allow at least twice the diameter of the duct between the duct
opening and the nearest obstruction.
IMPORT ANT: DO NOT use screens or caps on the outside of opening of exhaust duct work.
16
Page 21
Multiple Dryer (common) V enting
3.
If it is not feasible to provide separate exhaust ducts for each dryer , ducts from individual dryers may be
channeled into a "common main duct." The individual ducts should enter the bottom or side of the main duct
at an angle not more than 45º in the direction of air flow and should be spaced at least 38-1/4 inches apart.
The main duct should be tapered, with the diameter increasing before each individual duct (10-inch
minimum) is added.
IMPORT ANT : No more than four (4) dryers should be connected to main common duct.
The main duct may be any shape so long as the minimum cross sect is provided. The illustration on page xx
shows the minimum cross section area for multiple dryer round or square venting. These figures must be
increased 10 square inches when rectangular main ducting is used, and the ration of duct width to depth
should not be greater than 3-1/2 to 1. These figures must be increased in proportion if the main duct run
from the last dryer to where it exhausts to the outdoors is unusually long (over fifteen [15] feet) or has
numerous (more than two [2] elbows in it). In calculating duct work size, the cross section area of a square
or rectangular duct must be increased twenty (20) percent for each additional fifteen (15) feet. The
diameter of a round exhaust must be increased ten (10) percent for each additional fifteen (15) feet. Each
90º elbow is equivalent to an additional thirty (30) feet and each 45º elbow is equivalent to an additional
fifteen (15) feet.
IMPORT ANT : For extended duct work runs, the cross section area of the duct work can only be
increased to an extent. Maximum proportional duct work runs cannot exceed fifteen
(15) feet with two (2) elbows. When the duck work approaches the maximum limits
as noted in this manual, a professional HV AC firm should be consulted for proper
venting. HV AC should be consulted for proper venting information.
The duct work should be smooth inside with no projections from sheet metal screws or other obstructions
which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to be
connected. ALL duct work joints must be taped to prevent moisture and lint from escaping into the
building. Inspection doors should be installed at stategic points in the exhaust duct work for periodic
inspection and clean-out of lint from the duct work.
NOTE: Where the exhaust passes through a wall, ceiling, or roof made of combustible materials,
the opening must be 2-inches larger (all the way around) than the duct. The duct must be
centered within this opening.
a. Outside Duct W ork Protection
1) T o protect the outside end of horizontal duct work from wheather , a 90º elbow bent downward should be
installed where the exhaust exits the building. If the duct work travels vertically up through the roof, it
should be protected from the wheather by using a 180º turn to point the opening downward. In either
case, allow at least twice the diameter of the duct between the duct opening and the nearest obstruction.
IMPORT ANT : DO NOT use screens or caps on the outside of opening of exhaust duct work.
17
Page 22
18
Page 23
F. ELECTRICAL INFORMA TION
1. ELECTRICAL 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, ALL electrical connections, material,
and workmanship must conform to the applicable requirements of the National Electrical 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.
NOTE: Component failure due to improper installation will VOID THE WARRANTY.
Each dryer should be connected to an independently protected branch circuit. The dryer must be
connected with copper wire only. DO NOT use aluminum wire which could cause a fire hazard.
The copper conductor wire/cable must be of proper ampicity and insulation in accordance with
electric codes for making all service connections.
NOTE: The use of aluminum wire will VOID THE WARRANTY.
IMPORTANT: A separate circuit servicing each dryer must be provided.
19
Page 24
2. ELECTRICAL SERVICE SPECIFICATIONS
A. Gas and Steam Models
ADG -75 (G as )
ADS-75 ( Ste a m )
ELECTRICAL SERVICE SPECIFICATIONS (PER DRYER)
IMPORTANT: 208 VAC
NOTE
SERVICE
VOLTAGE
A . Fu s e ra ti ngs ar e dual -el eme nt, ti m e-de l ay, c urre nt l im i t i ng, c lass R K1 or RK 5 ONLY.
:
B. Circuit breakers are thermal magnetic (industrial) type ONLY. For others, calculate/verify correct
bre a ker siz e a c c ording to ap pli anc e a mp dra w rati ng an d t y p e of b r e a k e r used.
C. Ci rc ui t b rea kers f or 3 -p has e (3ø) dry e rs mus t b e 3-pole type.
PHASE
AND
230/240 VAC ARE NOT THE SAME . W
WIRE
SERVICE
APPROX.
AMP DRAW
60 Hz 50 Hz
HEN ORDERING, SPECIFY EXACT VOLTAGE
MIMIMUM
WIRE SIZE*
FUSING
D
UAL ELEMENT
T
IME DELAY
BREAKER
120 1ø 2 13 -- - 10 20 20
2 08 1ø 2 8 -- - 14 12 15
208 3ø 3/4 5 --- 14 8 15
240 3ø 3/4 5 5 14 8 15
2 40 1ø 2 7 7 14 12 15
380-400 3ø 3/4 --- 3 14 5 15
416 3ø 3/4 --- 3 14 5 15
460 3ø 3/4 3 --- 14 5 15
* AWG Stranded Wire ... fo r individual lenghts less than 100 feet.
.
CIRCUIT
IMPORTANT: Figures shown are for non-reversing models ONLY. For reversing models
contact the factory.
IMPORTANT: The dryer must be connected to the electric supply shown on the data label that
is affixed to the back side of the upper/top control door. In the case of 208
VAC or 230/240 VAC, the supply voltage must match the electric service
specifications of the data label exactly.
IMPORTANT: The wire size must be properly sized to handle the related current.
WARNING: 208 VAC and 230/240 VAC ARE NOT THE SAME. Any damage done to
dryer components due to improper voltage connections will automatically
VOID THE WARRANTY .
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
20
Page 25
B. Electric Models Only
ADE-75 (Electric)
E
LECTRICAL SERVICE SPECIFICATIO N S (PER DRYER
IMPORTANT: 208 VAC and 230/240 VAC ARE NOT THE SAME. When ordering, specify exact voltage.
)
NOTE
A. Fuse ratings are dual-element, time-delay, current limiting, class RK1 or RK5 ONLY.
:
B. Circuit break ers are thermal magnetic (industrial) type ONLY. For others, calculate/verify
correct breaker size according to appliance amp draw rating and type of breaker used.
Circ uit breake rs for 3Ø dryers mu st b e 3-pole type.
C
APPLIE D VOLTAGE/ PHASE/ FRE QUEN CY
KW 208 / 1ø/ 60Hz 240 / 1ø/ 60Hz 208 / 3ø/ 60Hz 240 / 3ø / 50/60Hz 380 / 3ø / 50Hz 416 / 3ø / 50Hz 460 /3ø / 60Hz
20 105 90 --- --- 33 --- --24 --- --- 72 63 --- 36 33
30 --- --- 88 77 --- 45 41
33 --- --- --- --- 53 --- --36 --- --- 104 92 --- 53 48
40 --- --- --- --- --- 59 ---
APPROX. AMP DRAW
IMPORTANT: Figures shown are for non-reversing models ONLY. For reversing models
contact the factory.
IMPORTANT: The dryer must be connected to the electric supply shown on the data label that
is affixed to the back side of the upper/top control door. In the case of 208 VAC
or 230/240 VAC, the supply voltage must match the electric service
specifications of the data label exactly.
IMPORTANT: The wire size must be properly sized to handle the related current.
WARNING: 208 VAC and 230/240 VAC ARE NOT THE SAME. Any damage done to dryer
components due to improper voltage connections will automatically
VOID THE WARRANTY.
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
IMPORTANT: 3 phase figures shown are for a 3 wire service ONLY.
21
Page 26
3. GROUNDING
A ground (earth) connection must be provided and installed in accordance with state and local
codes. In the absence of these codes, grounding must conform to applicable requirements of the
National Electric Code ANSI/NFPA NO. 70-LATEST EDITION. The ground connection may be
to a proven earth ground at the location service panel.
For added personal safety, when possible, it is suggested that a separate ground wire (no. 18
minimum) be connected from the ground connection of the dryer to a grounded cold water pipe.
DO NOT ground to a gas pipe or hot water pipe. The grounded cold water pipe must have metal
to metal connection all the way to the electrical ground. If there are any non-metallic
interruptions, such as, a meter, pump, plastic, rubber, or other insulating connectors, they must be
jumped out with no. 4 copper wire and securely clamped to bare metal at both ends.
IMPORTANT: For personal safety and proper operation, the dryer must be grounded.
Provisions are made for ground connection in each dryer at the electrical service connection area.
4. ELECTRICAL CONNECTIONS
NOTE: A wire diagram is located in the front electrical control box for connection data.
a. Gas and Steam Models Only
NOTE: A CIRCUIT SERVING EACH DRYER MUST BE PROVIDED.
1) Single Phase (1Ø) Wiring Connections (Hookup)
The electrical connections on ALL Single-phase (1 Ø) gas and steam dryers are made into
the rear service box located at the upper left area of the dryer.
22
Page 27
Actual electrical wire connections are made to the L1 and L2 terminals of the motor contactor located in
the rear service box mentioned above. The ground connection is also made to the copper lug also provided in this box.
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If local codes permit, power to the dryer can be made by the use of a flexible U.L. listed power cord/pigtail
(wire size must conform to rating of dryer), or the dryer can be hard wired directly to the service breaker
panel. In both cases, a strain relief must be installed where the wiring enters the dryer.
2) 3 Phase (3 Ø) Wiring Connections / Hookup "NON-REVERSING MODELS ONLY"
The electrical connections on ALL three-phase (3 Ø) gas and steam dryers are made into the rear service
box located at the upper left area of the dryer. Electrical connections for electrically heated dryers are
made in the electric oven area located at the upper rear area of the dryer.
NOTE: A CIRCUIT SERVING EACH DRYER MUST BE PROVIDED.
If local codes permit, power to a gas or steam dryer can be made by the use of a flexible U.L. listed power
cord/pigtail (wire size must conform to rating of dryer), or the dryer can be hard wired directly to the
service breaker panel. In all cases, a strain relief must be installed where the wiring enters the dryer.
23
Page 28
The only electrical input connections to the dryer are the 3-phase (3Ø) power leads (L1,L2,L3
and sometimes neutral) and ground. Single phase (1Ø) power for the control circuit is done
internally to the dryer. No single phase (1Ø) input connection is required on a three phase (3Ø)
dryer.
For gas and steam dryers manufactured for operation at three phase (3Ø), the electrical
connections are made at the power distribution block located in the service box at the rear, upper
left corner of the dryer. The ground connection is made to the copper lug also provided in this
box. To gain access to the service box contactor, the service box cover must be removed.
24
Page 29
3) 3 Phase Wiring Connections/Hookup "Reversing Models Only"
The electrical connections on ALL 3-phase (3 Ø) gas and steam dryers are made into the rear service box
located at the upper left area of the dryer. Electrical connections for electrically heated dryers are made in
the electric oven area located at the upper rear area of the dryer.
IMPORTANT: A separate circuit serving each dryer must be provided.
If local codes permit, power to a gas or steam dryer can be made by the use of flexible U.L. listed power
cord/pigtail (wire size must conform to rating of dryer), or the dryer can be hard wired directly to the
service breaker panel. In all cases, a strain relief must be installed where the wiring enters the dryer.
The only electrical input connections to the dryer
are the 3-phase (3Ø) power leads (L1,L2,L3 and
sometimes neutral) and ground. Single phase (1Ø)
power for the control circuit is done internally
to the dryer. No single phase input connection
is required on a three phase (3Ø) dryer.
For gas and steam dryers manufactured for operation at
three phase (3Ø), the electrical connections are made at
the power distribution block located in the service box at
the rear, upper left corner of the dryer. The ground
connection is made to the copper lug also provided in
this box. To gain access to the service box contactor, the
service box cover must be removed.
25
Page 30
b) ELECTRICALLY Heated Models Only
The only electrical input connections to the dryer are the 3-phase (3 Ø) power leads (L1,L2,L3
and sometimes neutral) and ground. Single phase power for the control circuit and for any
single phase (1 Ø) motors (if present) is done internally to the dryer by the factory at the
oven contactor. No single phase (1 Ø) input connection is required on a 3-phase (3 Ø)
dryer.
CAUTION: The dryer must be grounded. A ground lug has been provided for this purpose.
Input connection wiring must be sized properly to handle the dryer's current draw. This
information is printed on the dryers data label.
IMPORTANT: A separate circuit serving each dryer must be provided.
The electrical input connections are made at the electric oven contactor located inside the
assembly at the rear center upper section of the dryer. The ground connection is made to a
copper lug also provided in this area. To gain access, remove oven rear service cover.
IMPORTANT: A strain relief must be used where the input wiring enters the oven assembly.
26
Page 31
G. GAS INFORMA TION
It is your responsibility to have ALL plumbing connections made by a qualified professional to assure
that the gas plumbing installation is adequate and conforms with local and state regulations or codes. In
the absence of such codes, ALL plumbing connections, materials, and workmanship must conform to the
applicable requirements of the National Fuel Gas Code ANSI Z223.1-LATEST EDITION.
IMPORTANT: Failure to comply with these codes or ordinances, and/or the requirements
stipulated in this manual, can result in PERSONAL INJURY and IMPROPER
OPERATION of the dryer.
The dryer and its individual shut-off valves must be disconnected from the gas supply piping system
during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). The dryer must
be isolated from the gas supply piping system by closing its individual manual shut-off valve during any
pressure test of the gas supply system at test pressures equal to or less than 1/2 psig (3.5 kPa).
IMPORTANT: Failure to isolate or disconnect the dryer from supply as noted can cause
irreparable damage to the gas valve VOIDING THE WARRANTY.
WARNING: FIRE or EXPLOSION COULD RESULT.
1. GAS SUPPLY
The gas 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
professional.
NOTE: Undersized gas piping will result in ignition problems, slow drying, increased use of
energy, and can create a safety hazard.
The dryer must be connected to the type of heat/gas indicated on the dryer label affixed behind the right
control box door. If this information does not agree with the type of gas available, DO NOT operate the
dryer. Contact the distributor who sold the dryer or the ADC factory.
IMPORTANT: Any burner changes or conversions must be made by a qualified professional.
The 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 or conversion of dryers in the field for elevations over 2,000 feet are made by changing each
burner orifice. If this conversion is necessary, contact the distributor who sold the dryer or contact the
ADC factory.
27
Page 32
2. TECHNICAL GAS DATA
a. Gas Specifications
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b. Gas Connections:
Inlet connection ------------ 3/4"-inch N.P.T.
Inlet supply size ------------ 3/4"-inch N.P.T. (minimum)
Btu/hr input (per dryer) --- 200,000
1) Natural Gas
Regulation is controlled by the dryer's gas valve's internal regulator. Incoming supply
pressure must be consistent between a minimum of 6.0 inches and a maximum of 12.0
inches water column pressure.
7\SHRI *DV
1DWXUDO / LTXLG 3URSDQH
2) Liquid Propane (L.P.) Gas
Dryers made for use with L.P. gas have the gas valve's internal pressure regulator
blocked open so that the gas pressure must be regulated upstream of the dryer. The
pressure measured at each gas valve pressure tap must be a consistent 11.0 inches
water column. There is no regulator or regulation provided in an L.P. dryer. The water
column pressure must be regulated at the source (L.P. tank) or an external regulator
must be added to each dryer.
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Natural Gas ................... # H = .2660
Liquid Propane Gas ...... # 21 = .1590
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28
Page 33
3. PIPING/CONNECTIONS
ALL components/materials must conform to National Gas Code specifications. It is important that
gas pressure regulators meet applicable pressure requirements and that gas meters be rated for the
total amount of
The dryer is provided with a 3/4" N.P.T. inlet pipe connection located at the right side of the base of
the dryer. The minimum pipe size (supply line) to the dryer is 3/4" N.P.T. For ease in servicing, the
gas supply line of each dryer must have its own shut-off valve.
The size of the main gas supply line (header) will vary depending on the distance this line travels
from the gas meter or, in the case of L.P. (liquid propane) gas, the supply tank, other gas-operated
appliances on the same line, etc. Specific information regarding supply line size should be
determined by the gas supplier.
ALL the appliance BTU's being supplied.
NOTE: Undersized gas supply piping can create a low or inconsistent pressure which will result
in erratic operation of the burner ignition system.
29
Page 34
Consistent gas pressure is essential at ALL gas connections. It is recommended that a 3/4-inch pipe
gas loop be installed in the supply line serving a bank of dryers. An in-line pressure regulator must
be installed in the gas supply line (header) if the (natural) gas pressure exceeds 12.0 inches of water
column pressure.
NOTE: A water column test pressure of 3.5-4.0-inches for natural gas and 11.0-inches for L.P.
(liquid propane) dryers is required at the gas valve pressure tap of each dryer for proper
and safe operation.
A 1/8" N.P.T. plugged tap, accessible for a test gauge connection, must be installed in the main gas
supply line immediately upstream of each dryer.
IMPORTANT: Pipe joint compounds that resist the action of natural gas and L.P. gas must be
used.
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!!!
ALL components/materials must conform to National Gas Code specifications. It is important that
gas pressure regulators meet applicable pressure requirements and that gas meters be rated for the
total amount of
ALL the appliance BTU's being supplied.
IMPORTANT: The dryer and its individual shut-off valve must be disconnected from the gas
supply piping system during any pressure testing of that system at test pressures
in excess of 1/2 psig (3.5 kPa).
NOTE: The dryer must be isolated from the gas supply piping system by closing its individual
manual shut-off valve during any pressure test of the gas supply system at test pressures
equal to or less than 1/2 psig (3.5 kPa).
H. STEAM INFORMA TION
It is your responsibility to have ALL plumbing connections made by a qualified professional to assure
that the gas plumbing installation is adequate and conforms with local and state regulations or codes.
IMPORTANT: Failure to comply with the requirements stipulated in this manual can result in
component failure which will VOID THE WARRANTY.
NOTE: The ADS-75 is manufactured with a pneumatic (piston) damper system which requires
an external supply of air (80 PSI +/- 10 PSI).
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.
30
Page 35
2. Steam Requirements - High Pressure
Inlet -------- 1" supply line connection -- qty. one (1) at top manifold
Return ----- 1" return line connection -- qty. one (1) at top manifold
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* Minimum operating pressure for optimum drying results.
3. Installation Instructions
To insure an adequate supply of steam is provided, be sure that the steam lines and steam return lines
are sized and laid out as stipulated in this manual. Inadequate steam lines and steam return lines or
improper steam plumbing will result in poor performance and can cause component failure. Clean,
dry steam must be provided to the dryer.
IMPORTANT: Steam coil failure due to water hammer by wet steam will
VOID THE WARRANTY.
a. The pressure of the condensate in the steam supply will cause water hammer and subsequent heat
exchanger (steam coil) failure. The steam supply connection into the main supply line must be
made with a minimum 10-inch riser. This will prevent any condensate from draining towards the
dryer.
b. The steam supply piping to the dryer must include a 12-inch rise along with a drip trap and check
valve. This will prevent any condensate from entering the steam coil.
c. Flexible hoses or couplings must be used. The dryer vibrates slightly when it runs and this will
cause the steam coil connections to crack if they are hard piped to the supply and return mains.
d. Shut-off valves for each dryer should be installed in the supply line, return line, and drip trap return
line. This will allow the dryer to be isolated from the supply main and the return main if the dryer
needs maintenance work.
e. Install an inverted bucket steam trap and check valve at least 12-inches below the steam coil as close
to the coil as possible.
1) A trap with capacity of 700 pounds of condensate per hour at 125 psi is needed for each unit.
f. The supply line and the return line should be insulated. This will save energy and provide for the
safety of the operator and maintenance personnel.
31
Page 36
g. Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly
causing steam coil damage.
for every one (1) foot back towards the steam supply header causing the condensate in the line to
drain to the header. Install a bypass trap in any low point to eliminate wet steam.
ALL horizontal runs of steam supply piping should be pitched 1/4-inch
IMPORTANT: Flexible hose/coupling must be used. Coil Failure due to hard plumbing
connections will VOID THE WARRANTY.
32
Page 37
3. STEAM DAMPER AIR SYSTEM CONNECTIONS
The ADS-75 is manufactured with a pneumatic (piston) damper system which requires an external
supply of compressed air. The air connection is made to the steam damper solenoid valve which is
located at the rear inner top area of the dryer just in front of the electric service relay box.
a. Air Requirements
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b.
Air Connection
Air connection to system --- 1/8-inch N.P.T.
c. No air regulator or filtration is provided with the dryer. External regulation/filtration of 80 psi must be
provided. It is suggested that a regulator/filter gauge arrangement be added to the compressed air line
just before the dryer connection. This is necessary to insure that correct and clean air pressure is
achieved
.
33
Page 38
4. STEAM DAMPER SYSTEM OPERATION
The ADS-75 steam damper shown in Diagram 1 in the illustration below, allows the coil to stay
constantly charged eliminating repeated expansion and contraction. When the damper is opened,
the air immediately passes through the already hot coil, providing instant heat to start the drying
process. When the damper is closed, ambient air is drawn directly into the tumbler, allowing a
rapid cool down (Diagram 2).
Diagram 1 shows the damper in the heating (open) mode, allowing heat into the tumbler.
Diagram 2 shows the damper in the cool down (closed) mode, pulling ambient air directly into
the tumbler without passing through the coils.
NOTE: With the dryer off or with no air supply, the steam damper is in cool down mode as
shown in Diagram 2.
34
Page 39
5. Steam Damper Air Piston (Flow Control) Operation Adjustment
Although the steam damper operation was tested and adjusted prior to shipping at 80 PSI, steam
damper operation must be checked before the dryer is put into operation. Refer to
instructions to check steam damper operation. If steam damper adjustment is necessary, locate the
flow control valve and make the necessary adjustments as noted below.
page 33 for
35
Page 40
I. PREP ARA TION FOR OPERA TION/STAR T-UP
The following items should be checked before attempting to operate the dryer:
1. Read
2. Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label
3. GAS MODELS - check to assure that the dryer is connected to the type of heat/gas indicated on the
4. GAS & ELECTRIC MODELS -the sail switch damper assembly was installed and adjusted at
5. GAS MODELS - be sure that ALL gas shut-off valves are in the open position.
6. Be sure ALL side and base panels are on the dryer.
7. Check ALL service doors to insure that they are closed and secure.
8. Be sure the lint door is securely in place.
ALL "CAUTION," "WARNING," and "DIRECTION" labels attached to the dryer.
affixed to the back side of the top front control/service door. In the case of 208 VAC or 230/240
VAC, THE SUPPLY VOLTAGE MUST MATCH THE ELECTRIC SERVICE EXACTLY.
dryer data label.
the factory prior to shipping. However, each sail switch
adjustment must be checked to assure that this important safety
control is functioning.
(see
page 37 for Sail Switch Adjustment)
9. Rotate the basket (tumbler/drum) by hand to be sure it moves freely.
10.Check bolts, nuts, screws, terminals, and fittings for security.
11.STEAM MODELS - check to insure air supply (80 PSI) is connected to the dryers.
12. STEAM MODELS - check to insure ALL steam shut-off valves are open.
13. STEAM MODELS - check steam damper operation.
14.Check tumbler bearing set screws to insure they are ALL tight.
36
Page 41
J. PREOPERATIONAL TESTS
ALL dryers are thoroughly tested and inspected before leaving the factory. However, a preoperational test
should be performed before the dryer is publicly used. It is possible that adjustments have changed in
transit or due to marginal location (installation) conditions.
1. Turn on electric power to the dryer.
a. Open ALL shut-off valves (Gas & models only)
2. Refer to the Operating Instructions for starting your particular model dryer.
3. Gas Dryers
a. When a gas dryer is first started (during initial start-up), it has a tendency not to
ignite on the first ignition attempt. This is because the gas supply piping is filled
with air, so it may take a few minutes for the air to be purged from the lines.
NOTE: During the purging period, check to be sure that ALL gas shut-off valves are open.
NOTE: Gas dryers are equipped with a Direct Spark Ignition (DSI) system which has internal
diagnostics. If ignition is not established, the heat circuit in the DSI module will lock out
until it is manually reset. To reset the DSI system, open and close the main door and
restart the dryer.
b. A gas pressure test should be taken at the gas valve pressure tap of each dryer to assure
that the water column pressure is correct and consistent.
NOTE: Water column pressure requirements (measured at the pressure tap of the gas valve body):
Natural Gas .......... 3.5 - 4.0 -Inches Water Column
L.P. Gas ................ 10.5-11.0 Inches Water Column
IMPORTANT: There is no regulator provided in an L.P. dryer. The water column pressure
must be regulated at the source (L.P. tank), or an external regulator must be
added to each dryer.
Steam Dryers
a. Check to insure that steam damper is functioning properly.
1. The steam damper should not "slam" (open or closed) when it reaches the end of (piston) travel.
Additionally, the steam damper should not bind and/or stop during travel. If either of these
conditions occur, the flow control must be adjusted. Refer to the bottom illustration on
air adjustment instructions.
page 34 for
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Electrically Heated Dryers
a. Check to insure that electric oven/contactor assembly is activating.
4. Make a complete operational check of ALL safety related circuits:
a. Door Switch(es)
b. Hi-Limit thermostats
c. Sail switch (for Gas & Electric Models Only)
NOTE: To check for proper sail switch operation (for Gas & Electric Models Only), open the
main door and while holding main door switch plunger in, start dryer. Dryer should start
but heat circuit should not be activated (on). If the heat system is activated, the sail
switch is improperly adjusted and must be adjusted by bending the actuator arm of the
sail switch toward the burner box. If the actuator arm is bent too far toward the burner
box of the dryer, the dryer may not have heat when needed. After any adjustment to the
sail switch, the above procedure must be repeated to verify proper operation of the sail
switch.
5. The dryer should be operated through one (1) complete cycle to assure that no further adjustments are
necessary and that ALL components are functioning properly.
IMPORTANT: The dryer basket (tumbler) is treated with a protective coating. ADC suggests
tumbling old clothes or material in the basket (tumbler), using a mild detergent to
remove the protective coating.
6. Make a complete operational check of ALL operating controls.
a. For Microprocessor model check controller (computer) programs/selections...
1) Each microprocessor controller (computer) has been preprogrammed by the factory with
the most commonly used parameter (program) selections. If computer program changes are
required, refer to the computer programming manual which was shipped with the dryer.
7. Check the electric service phase sequence (three-phase [3ø] models only). While the dryer is operating,
check to see if the blower wheel (impeller/fan) is rotating in the proper direction. Looking from the
front, the blower wheel (impellor/fan) should spin in the clockwise direction. If it is, the phasing is
correct. If the phasing is incorrect, reverse two (2) of the three (3) leads at connections L1, L2, L3 of the
power supply to the dryer.
IMPORTANT: If the blower wheel (impellor/fan) is rotating in the wrong direction, this will not
only drastically reduce drying efficiency, but it can also cause premature
component failure.
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8. REVERSING MODELS ONLY - basket (tumbler) dryer should never be operated with less than a 30 lb.
load (dry weight). The size of the load will affect the coast-down and dwell (stop) times. The basket
(tumbler) must come to a complete stop before starting in opposite direction.
a. Microprocessor Models
1. Spin and stop are not adjustable in the Automatic Mode and have been preprogrammed into
the microprocessor controller (computer) for 120-seconds spin time in forward direction, 120
in reverse direction and a 5-second dwell (stop) time.
2. Spin and stop times are adjustable in the Manual (timed) Mode.
b. Dual Timer Models
1. Both dwell (stop) and basket (tumbler) spin time are adjustable. (see illustration on
9. Check to insure that ALL set screws (i.e., tumbler drive, idler, etc.) are tight.
K. PREOPERA TIONAL INSTRUCTIONS
1. To start the dryer:
a. Microprocessor (computer) dryers
1. The L.E.D. display will read "FILL".
2. Press the "E" on the touch pad of the keyboard.
3. The dryer will start and the display will quickly show "Ld30", "F180", the dryer will
start, and the L.E.D. display will show "dr30".
4. To stop dryer, open main door or press "Clear/Stop" Key.
Refer to the User's Manual for detailed operating instructions.
page 48.)
b. Dual Timer Dryers
1. Turn drying timer knob for a time of 20 minutes.
2. Select "High Temp."
3. Push "Push To Start" Switch.
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L. SHUT DOWN INSTRUCTIONS
If the dryer is to be shut down (taken out of service) for a period of time, the following must be per-
formed:
1. Discontinue power to the dryer either at the external disconnect switch or the circuit breaker.
2. Discontinue the heat supply:
a. GAS MODELS ... discontinue the gas supply.
1) SHUT OFF external gas supply shut-off valve.
2) SHUT OFF internal gas supply shut-off valve located in the gas valve burner area.
b. STEAM MODELS ... discontinue the steam supply.
1) SHUT OFF external (location furnished) shut-off valve.
2) SHUT OFF internal steam valves in the supply lines and the return lines.
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SECTION IV
SERVICE/P ARTS INFORMA TION
A. SERVICE
1. Service must be performed by a qualified trained technician, service agency, or gas supplier. If
service is required, contact the distributor from whom the ADC equipment was purchased. If the
distributor cannot be contacted or is unknown, contact the ADC Service Department for a
distributor in your area.
NOTE: When contacting the ADC Service Department, be sure to give them the correct model
number and serial number so that your inquiry is handled in an expeditious manner.
B. PARTS
1. Replacement parts should be purchased from the distributor from whom the ADC equipment was
purchased. If the distributor cannot be contacted or is unknown, contact the ADC Parts Department
for a distributor in your area. Parts may also be purchased directly from the factory by calling the
ADC Parts Department at (508) 678-9010 or you may FAX in your order at (508) 678-9447.
NOTE: When ordering replacement parts from the ADC dealer or the ADC factory be sure to
give them the correct model number and serial number so that your parts order can be
processed in an expeditious manner.
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SECTION V
WARRANTY INFORMA TION
A. RETURNING W ARRANTY CARD(S)
1. Before any dryer leaves the ADC factory test area, a warranty card (ADC Part No. 112254) is placed
on the back side of the main door glass. These warranty cards are intended to serve the customer
where we record the individual installation date and warranty information to better serve you, if you
file a warranty claim.
a. If a warranty card (ADC Part No. 112254) did not come with your dryer, contact the ADC
Warranty Department or ADC Service Department at (508) 678-9000.
B. PARTS
For a copy of the ADC commercial warranty covering your particular dryer(s), contact the ADC
distributor from whom you purchased the equipment and request dryer warranty form ADC Part No.
450199. If the distributor cannot be contacted or is unknown, warranty information can be obtained
from the factory by contacting the ADC Warranty Department at (508) 678-9000.
NOTE: Whenever contacting the ADC factory for warranty or warranty information, be sure to
have the dryer's model number and serial number available so that your inquiry can be
handled in an expeditious manner.
C. RETURNING W ARRANTY P ARTS
ALL dryer or parts warranty claims or inquiries should be addressed to the ADC Warranty Parts
Department. To expedite processing, the following procedures must be followed:
1. No parts are to be returned to ADC without prior written authorization ("Return Material
Authorization") from the factory.
NOTE: An R.M.A. ("Return Material Authorization") is valid for only sixty (60) days from date
of issue.
a. The R.M.A. issued by the factory, as well as any other correspondence pertaining to the returned
part(s), must be included inside the package with the failed merchandise.
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2. Each part must be tagged with the following information:
a.
Model number and serial number of the dryer from which part was removed.
b. Nature of failure (be specific).
c. Date of dryer installation.
d. Date of part failure.
e. Specify whether the part(s) being returned is for a replacement, a credit, or a refund.
NOTE: If a part is marked for a credit or a refund, the invoice number covering the purchase of
the replacement part must be provided.
NOTE: W arranty tags (ADC Part No. 450064) are available at "no charge" from ADC upon
request.
3. The company returning the part(s) must clearly note the complete company name and address on the
outside of the package.
4. ALL returns must be properly packaged to insure that they are not damaged in transit. Damage claims
are the responsibility of the shipper.
IMPORTANT: No replacements, credits or refunds will be issued for merchandise damaged in
transit.
5. ALL returns should be shipped to the ADC factory in such a manner that they are insured and a proof of
delivery can be obtained by the sender .
6. Shipping charges are not the responsibility of ADC. ALL returns should be "prepaid" to the
factory. Any "C.O.D." or "COLLECT" returns will not be accepted.
IMPOR TANT: No replacements, credits, or refunds will be issued if the claim cannot be
processed due to insufficient information. The party filing the claim will be
notified in writing, either by "F AX" or "CERTIFIED MAIL - Return Receipt
Requested", as to the information necessary to process claim. If a reply is not
received by the ADC W arranty Department within thirty (30) days from the
F AX/letter date, then no replacement, credit, or refund will be issued, and the
merchandise will be discarded.
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SECTION VI
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 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
ACCUMULA TION OF LINT CAN CREA TE A POTENTIAL FIRE HAZARD.
W ARNING: KEEP DR YER AREA CLEAR AND FREE FROM COMBUSTIBLE
MA TERIALS, GASOLINE, and OTHER FLAMMABLE V APORS and
LIQUIDS.
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 every third or fourth load. A clogged lint screen will cause poor dryer
performance. The lint screen is located behind the lint door in the base of the dryer. Open the lint door,
brush the lint off the lint screen, and remove the lint. Inspect lint screen and replace if torn.
NOTE: The frequency of cleaning the lint screen can best be determined from experience at each
location.
WEEKL Y
Clean lint accumulation from lint chamber, thermostat, and microprocessor temperature sensor (sensor
bracket) area.
WARNING: TO A VOID THE HAZARD OF ELECTRICAL SHOCK, DISCONTINUE
ELECTRICAL SUPPL Y TO THE DR YER.
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STEAM MODELS- clean the steam coil fins. We suggest using compressed air and a vacuum cleaner
with brush attachment.
W ARNING: 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 house.
90 DA YS
1. Remove lint from around basket (tumbler), drive motors, and surrounding areas.
2. Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment.
3. Clean any lint accumulation in and around both the blower and drive motor casing openings.
NOTE: To prevent damage, avoid cleaning and/or touching ignitor/flame-probe assembly .
EVERY 6 MONTHS
Inspect and remove lint accumulation in customer furnished exhaust duct work system and from
dryers internal exhaust ducting.
NOTE: THE ACCUMULATION OF LINT IN THE EXHAUST DUCT WORK CAN
CREA TE 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 ACCUMULA TION WHICH
CAN CAUSE THE DAMPER TO BIND or STICK.
NOTE: A back draft damper that is sticking partially closed can result in slow drying and
shutdown of heat circuit safety switches or thermostats.
NOTE: When cleaning the dryer cabinet(s), avoid using harsh abrasives. A product intended
for the cleaning of appliances is recommended.
45
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B. ADJUSTMENTS
7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER
Inspect bolts, nuts, screws, (bearing set screws), non-permanent gas connections (unions,
shut-off valves, orifices, and grounding connections). Motor and drive belts should be
examined. Cracked or seriously frayed belts should be replaced. Tighten loose V-belts when
necessary. Complete operational check of controls and valves. Complete operational check of
ALL safety devices (door switches, lint drawer switch, sail switch, burner and hi-limit
thermostats).
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SECTION VII
PROCEDURE FOR FUNCTIONAL CHECK OF
REPLACEMENT COMPONENTS
1. Microprocessor (computer) Board
a. Upon completing installation of the replacement microprocessor (computer) board, reestablish power
to the dryer.
b. Start the drying cycle.
c. Verify that the motor(s) and the heat indicator dots, in the microprocessor (computer) L.E.D. display
are on. (Refer to the illustration below.)
d. Verify that the motor(s) heat, and door indicator lights on the back side of the microprocessor
(computer) board are lit. (Refer to the illustration below.)
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e. Open main door. The dryer must stop and
microprocessor (computer) board must go out. (Refer to illustration on the previous page
[page 46].)
f. Try to restart the dryer with the main door open.
g. The microprocessor (computer) board's L.E.D. display must read DOOR."
h. Close the main door and restart the dryer.
i. Functional check of microprocessor (computer) board is complete.
Direct Spark Ignition (DSI) System
2.
a. Upon completing installation of the replacement
Direct Spark Ignition (DSI) module, reestablish
power to the dryer.
b. Starting the drying cycle.
c. The ignition (DSI) module's L.E.D. indicator will
light "red" for up to approximately 1.5 seconds
(pre-perge time).
ALL indicator lights on the back side of the
d. The module's indicator light will then turn
"green." The gas valve will be energized and
the ignitor probe will spark for approximately 8
seconds. The burner flame should now be
established.
e. With the burner flame on, remove the flame
sensor wire from the FS terminal of the DSI
module.
f. The burner flame must shut off and the ignition module must lock out with the DSI module's
indicator light "red."
g. Stop the drying cycle, with the flame sensor wire still removed, restart the drying cycle.
h. The ignition module must proceed through the pre-purge, with the indicator light "red," the
ignition trial time of approximately 8 seconds, with the indicator light "green," and then proceed to
lock out with the indicator light "red."
i. Functional check of the Direct Spark Ignition (DSI) Module is complete.
1) Replace the flame sensor wire from the FS terminal to the DSI module.
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Page 53
SECTION VIII
REVERSING TIMER SPIN/DWELL
ADJUSTMENTS
Dual timer models with "reversing option" have an electric reversing timer in the electric service box
which is located in the upper rear area of the dryer.
Both the dwell (stop) time and basket (tumbler) spin time are adjustable by mode selection switches
located on the electronic timer (as noted in the illustration below).
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49
Page 54
TECHNICAL INFORMA TION
A. DATA LABEL
Contact American Dryer Corporation
SECTION IX
When contacting American Dryer Corporation certain information is required to insure proper service /
parts information from American Dryer. This information is on the data label located on the inside of the
control door. When contacting American Dryer please have the
available.
50
model number and serial number
Page 55
THE DATA LABEL
1. MODEL DRYER
The model number is an ADC number which describes the size of the dryer and the
type of heat (gas, electric, or steam).
2. SERIAL NUMBER
The serial number allows ADC to gather information on your particular dryer.
3. MANUFACTURING CODE NUMBER
The manufacturing code number is a number issued by ADC which describes
ALL possible options on your particular model.
4. TYPE OF HEAT
The type of heat describes the type heat for your particular dryer; gas (either natural
gas or liquid propane [L.P.]), or steam.
5. HEAT INPUT (for GAS DRYERS)
This describes the heat input in British Thermal Units per Hour (BTUH).
6. ORIFICE SIZE (for GAS DRYERS)
Gives the number drill size used.
7. ELECTRIC SERVICE
This describes the electric service for your particular model.
8. GAS MANIFOLD PRESSURE (for GAS DRYERS)
This describes the manifold pressure taken at the gas valve tap.
9. APPLICABLE APPROVAL SEAL(S)
I.E., American Gas Association, Canadian Gas Association.
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SECTION X
TROUBLESHOOTING
WARNING: 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.
The information provided will help isolate the most probable component(s) associated with the difficulty
described. The experienced technician realizes, however, that a loose connection or broken/shorted wire
may be at fault where electrical components are concerned .. not necessarily the suspect component itself.
Electrical parts should always be checked for failure before being returned to the factory.
IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the
fuse being replaced. The information provided should not be misconstrued as a
handbook for use by an untrained person in making repairs.
WARNING: ALL SERVICE and TROUBLESHOOTING SHOULD BE PERFORMED BY A
QUALIFIED PROFESSIONAL or SERVICE AGENCY.
WARNING: WHILE MAKING REPAIRS, OBSERVE ALL SAFETY PRECAUTIONS
DISPLAYED ON THE DRYER or SPECIFIED IN THIS MANUAL.
TABLE OF CONTENTS
(FOR TROUBLESHOOTING)
MICROPROCESSOR (COMPUTER) MODELS
ITEM PAGE
NO L.E.D. DISPLAY .............................................................................................. A 52
DRIVE MOTOR DOES NOT START ............................................................................ B 52
DRIVE MOTOR (REVERSING MODELS ONLY) OPERATES IN ONLY ONE DIRECTION ............ C 52
DRIVE MOTOR OPERATES FOR A FEW MINUTES THEN STOPS ................................... D 52
BLOWER/FAN MOTOR (REVERSING MODELS ONLY) DOES NOT START ............................. E 53
BLOWER/FAN MOTOR (REVERSING MODELS ONLY) OPERATES FOR A FEW MINUTES
THEN STOPS ....................................................................................................... F 53
BLOWER MOTOR AND FAN MOTOR (REVERSING MODELS ONLY) BOTH DO NOT START .... G, H 53
BLOWER MOTOR AND FAN MOTOR (REVERSING MODELS ONLY) OPERATES FOR A FEW
MINUTES AND BOTH STOP ................................................................................... I 53, 54
L.E.D. DISPLAY READS "dSFL" ............................................................................. J AND P54 AND 55
L.E.D. DISPLAY READS "door" ............................................................................... K, L 54
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MICROPROCESSOR (COMPUTER) MODELS (CONTINUED)
ITEM PAGE
MICROPROCESSOR CONTROLLER (COMPUTER) WILL NOT ACCEPT ANY KEYBOARD
(KEYPAD) ENTRIES ................................................................................................ M 55
MICROPROCESSOR CONTROLLER (COMPUTER) WILL ONLY A CCEPT CERTAIN KEYBOARD
(KEYPAD) ENTRIES ................................................................................................ N 55
MICROPROCESSOR CONTROLLER (COMPUTER) LOCKS UP ............................................. O 56
DRYER STOPS DURING CYCLE AND L.E.D. DISPLAY RETURNS TO "FILL" ............... Q 56
L.E.D. DISPLAY READS "SEFL" ........................................................................... R 56
L.E.D. DISPLAY READS "HOT" ............................................................................. S 56
HEATING UNIT IS NOT OPERATING ......................................................................... T, U, V 57, 58, 59
DRYER IS TAKING TO LONG TO DRY ...................................................................... W 59 THRU 61
"Auto Cycle" OVER DRYING ................................................................................ X 61
"Auto Cycle" UNDER DRYING .............................................................................. Y 61, 62
MAIN BURNERS (GAS MODELS ONLY) BURNING YELLOW .............................................. Z 62
CONDENSATION ON MAIN DOOR GLASS .................................................................. AA 62
DRYER SCRAPING NOISE AT BASKET (TUMBLER) AREA .............................................. BB 62
EXCESSIVE NOISE OR VIBRATION ............................................................................. CC 62, 63
TIMER MODELS
DRYER DOES NOT START ........................................................................................ A, B 63
DRIVE MOTOR (REVERSING MODELS ONLY) OPERATES IN ONLY ONE DIRECTION ............ C 63
DRIVE MOTOR OPERATES FOR A FEW MINUTES THEN STOPS ................................... D 64
BLOWER/FAN MOTOR (REVERSING MODELS ONLY) DOES NOT START ............................. E 64
BLOWER/FAN MOTOR (REVERSING MODELS ONLY) OPERATES FOR A FEW MINUTES
THEN STOPS ....................................................................................................... F 64
DRIVE AND BLOWER MOTORS (REVERSING MODELS ONLY) BOTH DO NOT START ........... G 64
HEATING UNIT IS NOT OPERATING (NO HEAT) ........................................................ H, I 66, 67
DRYER IS TAKING TO LONG TO DRY ...................................................................... J 67 THRU 69
MAIN BURNERS (GAS MODELS ONLY) BURNING YELLOW .............................................. K 69
CONDENSATION ON MAIN DOOR GLASS .................................................................. L 69
DRYER SCRAPING NOISE AT BASKET (TUMBLER) AREA .............................................. M 69
EXCESSIVE NOISE OR VIBRATION ............................................................................. N 69, 70
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MICROPROCESSOR (Computer) MODELS
A. No L.E.D. (light emitting diode) display (for microprocessor [computer] models ONLY)...
1. Service panel fuse blown or tripped breaker.
2. Blown control circuit L1 or L2 1/2-amp (slo blo) fuse.
3. Failed microprocessor controller (computer).
4. Failed control step down transformer (for 380 volts or higher models ONLY).
B. Drive motor is not operating (does not start)...
1. Microprocessor controller (computer) motor indicator dot and relay output L.E.D. indicator dots
are on ...
a. Failed drive motor contactor (relay).
b. Failed arc suppressor (A.S.) board (for Reversing Models ONLY).
c. Failed drive motor.
2. Microprocessor controller (computer) motor indicator dot and relay output L.E.D. indicator dots
are on, but motor output L.E.D. indicator is off ...
a. Failed microprocessor controller (computer).
C. Drive motor (Reversing Models ONLY) operates in one direction only ... stops and restarts in
the same direction...
1. Failed reversing contactor (relay).
2. Failed arc suppressor (A.S.) board.
3. Failed microprocessor controller (computer)...check output indicator.
D. Drive motor operates okay for a few minutes, then stops and will not restart...
1. Motor is overheating and tripping out on internal overload protector ...
a. Motor air vents clogged with lint.
b. Low voltage to motor.
c. Failed motor.
d. Tumbler (basket) is binding...check for an obstruction.
e. Failed idler bearings or tumbler bearings.
f. Failed blower (impellor/fan)...out of balance (for Non-Reversing Models ONLY).
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E. Blower/Fan motor is not operating (does not start)...
1. Microprocesssor controller (computer) motor indicator dot and relay output L.E.D. (light emitting
diode) indicator dots are on ...
a. Failed blower (impellor/fan) motor contactor (relay).
b. Failed arc suppressor (A.S.) board.
c. Failed blower (fan/impellor) motor.
2. Microprocessor controller (computer) "door" L.E.D. is on but motor output L.E.D. indicator is off...
a. Failed microprocessor controller (computer).
F. Blower/Fan motor (Reversing Models ONLY) operates okay for a few minutes, then stops and
will not restart...
1. Motor is overheating and tripping out on internal overload protector ...
a. Motor air vents clogged with lint.
b. Low voltage to motor.
c. Failed motor.
d. Failed blower (impellor/fan)...out of balance.
G. Both drive motor and blower (impellor/fan) motor (Reversing Models ONLY) not operating
(does not start) ... microprocessor (computer) motor indicator dots and relay output L.E.D.
(light emitting diode) indicators are on...
1. Failed arc suppressor (A.S.) board.
2. Failed contactors (both blower [fan/impellor] and drive ).
3. Failed motors (both blower [fan/impellor] motor and drive motor).
H. Both drive motor and blower (impellor/fan) motor (Reversing Models ONLY) not operating
(does not start) ... microprocessor (computer) L.E.D. motor indicator dots and the door
L.E.D. indicator are on but the relay output L.E.D. indicators are off (microprocessor
controller [computer] L.E.D. display does not read door)...
1. Failed microprocessor controller (computer).
I. Both drive motor and blower (impellor/fan) motor run a few minutes and stop ... micro-
processor (computer) L.E.D. display continue to read time or percent of extraction and ALL
indicator dots are off...
1. Fault in main door switch circuit ...
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a. Main door switch circuit out of adjustment.
b. Loose connection in main door switch circuit.
J. Microprocessor (computer) L.E.D. (light emitting diode) display reads "dSFL" continuously
and the buzzer (tone) sounds every 30 seconds...
1. Fault in microprocessor heat sensing circuit.
a. Blown "dSFL" 1/8-amp fuse on the microprocessor controller (computer).
b. Failed microprocessor temperature sensor.
c. Failed microprocessor controller (computer).
d. Broken wire or connection somewhere between the microprocessor controller (computer) and
the microprocessor temperature sensor.
K. Microprocessor controller (computer) L.E.D. display reads door and the microprocessor
(computer) DOOR L.E.D. indicator is off...
1. Fault (open circuit) in main door/lint drawer switch circuit ...
a. Main door not closed all the way.
b. Main door switch is out of proper adjustment.
c. Failed lint main door switch.
d. Broken wire/connection in main door wiring circuit.
2. Failed 24 VAC step down transformer.
L. Microprocessor controller (computer) L.E.D. (display reads door and the microprocessor
(computer) DOOR L.E.D. indicator is on...
1. Failed microprocessor controller (computer).
M. Microprocessor controller (computer) will not accept any keyboard [touchpad] entries, (i.e.,
L.E.D. display reads FILL and when keyboard [touchpad] entries are selected, the L.E.D.
display continues to read FILL)...
1. Failed keyboard label (touchpad) assembly.
2. Failed microprocessor controller (computer).
N. Microprocessor controller (computer) will only accept certain keyboard (touchpad) entries...
1. Failed keyboard label (touchpad) assembly.
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O. Microprocessor controller (computer) locks up and L.E.D. (light emitting diode) display reads
erroneous message(s) or only partial segments...
1. Transient power voltage spikes...disconnect the electrical power to the dryer, wait one (1) minute
and reestablish power to the dryer. If problem is still evident ...
a. Failed microprocessor controller (computer).
b. Failed keyboard label (touchpad) assembly.
P. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for
5 seconds, and then the L.E.D. display reads dSFL for approximately 30 seconds, and then
returns to FILL...
1. Loose connection somewhere between the microprocessor controller (computer) and the
microprocessor temperature sensor.
2. Loose "dSFL" 1/8-amp fuse on the microprocessor controller (computer).
Q. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for
5 seconds, and then the L.E.D. returns to FILL...
1. Loose connection somewhere in the main power circuit to the microprocessor controller
(computer).
R. Microprocessor controller (computer) L.E.D. display reads SEFL...
1. Rotational sensor circuit failure...fault somewhere in the tumbler (basket) rotation or circuit ...
a. Tumbler (basket) not rotating ...
1) Broken or loose V-belts.
2) Failure in drive motor circuit...refer to Section B, Section C, and Section D on page 53.
b. Failed rotational sensor.
c. Broken wire or connection between rotation sensor and microprocessor controller (computer).
S. Microprocessor controller (computer) L.E.D. display reads Hot...
1. Possible overheating condition...microprocessor controller (computer) has sensed a temperature
which has exceeded 220° F.
Hot display will not clear until temperature sensed has dropped to 220° F or lower and the
micro-processor controller (computer) is manually reset by pressing the CLEAR/STOP key.
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T. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model - DSI
module, Electric Model - electric oven contactor, or Steam Model - steam damper system
pneumatic solenoid) when dryer is first started and both the heat indicator dot and the "HEAT"
output L.E.D. is on...
GAS MODELS ...
1. Fault in sail switch circuit ...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering.
1) Lint screen is dirty.
2) Restriction in the exhaust.
3) No exhaust air flow ...
a) Failed impellor (fan/blower).
b) Fault in blower (impellor/fan) motor circuit (for Reversing Models ONLY).
2.Failed burner hi-limit.
3.Failed lint chamber sensor bracket basket (tumbler) hi-limit switch.
ELECTRIC MODELS ...
1. Fault in sail switch circuit ...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering.
1) Lint screen is dirty.
2) Restriction in the exhaust.
3) No exhaust air flow ...
a) Failed impellor (fan/blower).
b) Fault in blower (impellor/fan) motor circuit (for Reversing Models ONLY).
2.Failed burner hi-limit.
3.Failed lint chamber sensor bracket basket (tumbler) hi-limit switch.
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STEAM MODELS ...
1. Fault in lint chamber sensor bracket basket (tumbler) hi-limit.
U. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model - DSI
module, Electric Model - electric oven contactor, or Steam Model - steam damper system
pneumatic solenoid) when dryer is first started and both the heat indicator dot and the "HEAT"
output L.E.D. (light emitting diode) is not on...
1.Failed microprocessor controller (computer).
V. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model - DSI
module, Electric Model - electric oven contactor, or Steam Model - steam damper system 3-way
micro valve)...
GAS MODELS ...
1. Fault in Direct Spark Ignition system ...
a. Spark Probe sparks, but no ignition and DSI module "LOCKS-OUT" ("red" L.E.D.
indicator flashes) ...
1) Flame probe assembly is out of adjustment or has failed.
2) Severe air turbulence.
3) Failed DSI module.
4) Failed gas valve.
b. Spark Probe sparks, but burner goes off right away ...
1) Flame probe assembly is out of adjustment or has failed.
2) Sail switch is fluttering ...
a) Lint screen is dirty.
b) Restriction in exhaust duct work.
c. Spark Probe does not spark and DSI module "LOCKS-OUT" ("red" L.E.D. indicator flashes)...
1) Fault in Spark Probe wiring...break or loose connection.
2) Failed Spark Probe Assembly.
3) Failed DSI module.
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ELECTRIC MODELS ...
1. Failed oven contactor/coil.
2. Failed electric heating element(s).
STEAM MODELS ...
1. Air Operated System...
a. No (external) compressed air (80 PSI required) to steam damper solenoid.
b. Failed steam damper pneumatic solenoid.
c. Steam damper stuck in closed position...check for obstruction.
d. Leak in pneumatic system.
e. Failed steam damper air piston.
f. Flow control valve misadjusted.
2. Electrical Mechanical System...
a. Failed electrical mechanical motor.
b. Steam damper stuck in closed position...check for obstruction.
W. Dryer operates but is taking too long to dry...
1. Exhaust duct work run is too long or is undersized...back pressure cannot exceed 0.3 inches water
column (W.C.).
2. Restriction in duct work ...
a. Dryer back draft damper is sticking partially closed.
b. Restriction/obstruction in duct work ...
1) Check duct work from the dryer all the way to the outdoors.
3. Insufficient make-up air.
4. Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
5. Lint screen is dirty or is not being cleaned often enough.
6. Inadequate air flow ...
a. Impellor (fan/blower) failure.
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GAS MODELS ...
1) Low and/or inconsistent gas pressure.
Natural Gas pressure - must be between 3.5 and 4.0 inches of water column (W .C.).
L.P. (liquid propane) Gas pressure - must be between 10.5 and 11.0 inches of water
column (W .C.).
2) Poor air/gas mixture at burner (too much gas or not enough air) at the burner...yellow or poor
flame pattern ...
a. Not enough make-up air.
b. Restriction in the exhaust.
2) Poor air/gas mixture at burner (too much gas or not enough air) at the burner...yellow or poor
flame pattern ...
c. Gas pressure too high.
d. Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
e. Burner orifice size (D.M.S. [drill material size]) too large for application (i.e., high
elevation).
3) Sail switch is fluttering ...
a) Restriction in the exhaust ...
1) Lint screen is dirty or is not being cleaned often enough.
4) Failed burner hi-limit...opens at incorrect temperature.
5) Gas supply may have too low a heating value.
ELECTRIC MODELS ...
1) No enough make-up air.
2) Restriction in the exhaust ...
3) Lint screen is dirty or is not being cleaned often enough.
4) Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
5) Failed electric element(s).
6) Sail switch is fluttering ...
a) Restriction in the exhaust.
b) Sail switch is not adjusted properly.
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STEAM MODELS ...
1) Low steam supply.
a) Steam trap is too small.
b) Supply line is too small.
2) Low steam pressure.
3) Insufficient make-up air.
4) Lint screen is dirty or is not being cleaned often enough.
5) Restriction in the exhaust.
6) Dirty steam coil ...
a) Fins are clogged with lint.
7) Steam damper system is not functioning properly.
a) Steam damper is sticking closed.
b) Leak in the pneumatic (air) system.
7. Extractors (water) are not functioning properly.
8. Failed microprocessor controller (computer)...temperature calibration is inaccurate.
9. Failed microprocessor temperature sensor... calibration is inaccurate.
10. Failed lint chamber hi-heat switch (thermostat)...opens at incorrect temperature.
11. Microprocessor temperature sensor covered with lint.
NOTE: Lint accumulation on the sensor bracket can act as an insulator which will affect the
accuracy of the Automatic Drying Cycle.
X. At the completion of the "AUTO" drying/cooling cycle, the load is coming out over dried...
1. Percent of dryness (dryness level) of the cycle selected is too high.
2. Factor "A" and Factor "B" is not set correctly or Factor "B" has to be adjusted for adverse local
conditions.
Y. At the completion of the "AUTO" drying/cooling cycle, the load is coming out still damp...
1. Percent of dryness (dryness level) of the cycle selected is too high.
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2. Factor "A" and Factor "B"
conditions.
is not set correctly or Factor "B" has to be adjusted for adverse local
Z. Main burners are burning with a yellow flame (for Gas Models ONLY)...
1. Poor air/gas mixture (too much gas or not enough air) at the burner ...
a. Not enough make-up air.
b. Restriction in the exhaust.
c. Gas pressure is too high.
d. Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
e. Burner orifice size (D.M.S. [drill material size]) too large for application (i.e., high elevation).
AA. Condensation on main door glass...
1. Too long, undersized, or improperly installed duct work.
2. Back draft damper is sticking in the partially closed position.
BB. Scraping noise at basket (tumbler) area...
1. Check for obstruction caught in basket (tumbler)/wrapper area.
2. Basket (tumbler) is out of proper alignment ...
a. Check both the vertical alignment and lateral alignment.
b. Check for gap between the front panel and basket (tumbler)...bearing set screws may have
come loose, and basket (tumbler) walked forward or backward.
3. Loose basket (tumbler) tie rod.
4. Failed basket (tumbler) support.
CC. Excessive noise and/or vibration...
1. Dryer is not leveled properly.
2. Impellor (fan/blower) out of balance ...
a. Excessive lint build up on impellor (fan/blower).
b. Failed impellor (fan/blower).
3. Loose basket (tumbler) tie rod.
4. Failed basket (tumbler) support.
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5. Loose motor mount.
6. Failed idler bearings or basket (tumbler) bearings.
7. V-belts too tight or too loose.
8. Tumbler bearing set screws are loose.
9. Failed motor bearing.
TIMER MODELS
A. Dryer will not start...both drive motor and blower (impellor/fan) motor are not operating
and indicator light is off...
1. Service panel fuse blown or tripped breaker.
2. Dryer control circuit L1 or L2 1/2-amp (slo blo) fuse is blown.
3. Open in main door switch ...
a. Main door is not closed all the way.
b. Main door switch is out of proper adjustment.
c. Failed main door switch.
d. Broken connection/wire somewhere in the main door switch circuit.
4. Failed push-to-start relay.
5. Failed 24 VAC step down transformer or a fault in the wiring.
6. Failed heat timer.
7. Failed control step down transformer (for 380 volts or higher models ONLY).
B. Drive motor is not operating (does not start)...
1. Failed drive motor contactor (relay).
2. Failed reversing timer (for Reversing Models ONLY).
3. Failed drive motor.
C. Drive motor (Reversing Models ONLY) operates in one direction only ... stops and restarts in
the same direction...
1. Failed reversing contactor (relay).
2. Failed reversing timer.
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D. Drive motor operates okay for a few minutes, then stops and will not restart...
1. Motor is overheating and tripping out on internal overload protector ...
a. Motor air vents clogged with lint.
b. Low voltage to motor.
c. Failed motor.
d. Tumbler (basket) is binding...check for an obstruction.
e. Failed idler bearings or tumbler bearings.
E. Blower/Fan motor is not operating (does not start)...
1. Failed blower (impellor/fan) motor contactor (relay).
2. Failed blower (fan/impellor) motor.
F. Blower/Fan motor operates okay for a few minutes, then stops and will not restart...
1. Motor is overheating and tripping out on internal overload protector ...
a. Motor air vents clogged with lint.
b. Low voltage to motor.
c. Failed motor.
d. Failed blower (impellor/fan)...out of balance.
G. Both drive motor and blower (impellor/fan) motor (Reversing Models ONLY) not operating
(do not start) and indicator light is on...
1. Fault at L1 or L2 termination(s) between the terminal block and contactors (relays).
2. Failed contactors (both blower [fan/impellor] and drive ).
3. Failed motors (both blower [fan/impellor] motor and drive motor).
H. Heating unit is not operating (no heat)...no voltage at heating unit (i.e., Gas Model - DSI
module, Electric Model - electric oven contactor, or Steam Model - steam damper system
pneumatic solenoid) when dryer is first started...
GAS MODELS ...
1. Fault in sail switch circuit ...
a. Sail switch is out of adjustment or has failed.
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b. Sail switch damper is not closing or is fluttering.
1) Lint screen is dirty.
2) Restriction in the exhaust.
3) No exhaust air flow ...
a) Failed impellor (fan/blower).
b) Fault in blower (impellor/fan) motor circuit (for Reversing Models ONLY).
2. Failed burner hi-limit.
3. Failed lint chamber sensor bracket basket (tumbler) hi-limit switch.
ELECTRIC MODELS ...
1. Fault in sail switch circuit ...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering.
1) Lint screen is dirty.
2) Restriction in the exhaust.
3) No exhaust air flow ...
a) Failed impellor (fan/blower).
b) Fault in blower (impellor/fan) motor circuit.
c. Failed oven hi-limit.
d. Failed lint chamber sensor bracket basket (tumbler) hi-limit.
e. Failed temperature selection switch or circuit.
f. Failed temperature cycle thermostat (try another selection).
STEAM MODELS ...
1. Failed lint chamber sensor bracket hi-limit switch or circuit.
2. Failed temperature selection switch or circuit.
3. Failed temperature cycle thermostat (try another selection).
4. Failed heat timer.
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I. No heat)...no voltage at heating unit (i.e., Gas Model - Hot Surface Ignition [HSI] module,
Electric Model - electric oven contactor, or Steam Model - steam damper system pneumatic
solenoid)...
GAS MODELS ...
1. Fault in hot surface ignition system ...
a. Hot surface ignitor glows but no ignition and HSI module "LOCKS-OUT" ("red" L.E.D. [light
emitting diode] indicator flashes) ...
1) Flame probe assembly is out of adjustment or has failed.
2) Severe air turbulence.
3) Failed HSI module.
4) Failed gas valve.
b. Hot surface ignitor glows, but burner goes off right away ...
1) Flame probe assembly is out of adjustment or has failed.
2) Sail switch is fluttering ...
a) Lint screen is dirty.
b) Restriction in exhaust duct work.
c. Hot surface ignitor does not glow and HSI module "LOCKS-OUT" ("red" L.E.D. indicator
flashes)...
1) Fault in hot surface ignitor wiring...break or loose connection.
2) Failed hot surface ignitor.
3) Failed HSI module.
ELECTRIC MODELS ...
1. Failed oven contactor/coil.
2. Failed electric heating element(s).
STEAM MODELS ...
1. Air Operated System...
a. No (external) compressed air (80 PSI required) to steam damper solenoid.
b. Failed steam damper pneumatic solenoid.
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c. Steam damper stuck in
d. Leak in pneumatic system.
e. Failed steam damper air piston.
f. Flow control valve misadjusted.
2. Electrical Mechanical System...
a. Failed electrical mechanical motor.
b. Steam damper stuck in closed position...check for obstruction.
closed position...check for obstruction.
J. Dryer operates but is taking too long to dry...
1. Exhaust duct work run is too long or is undersized...back pressure cannot exceed 0.3 inches water
column (W.C.).
2. Restriction in duct work ...
a. Dryer back draft damper is sticking partially closed.
b. Restriction/obstruction in duct work ...
1) Check duct work from the dryer all the way to the outdoors.
3. Insufficient make-up air.
4. Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
5. Lint screen is dirty or is not being cleaned often enough.
6. Inadequate air flow ...
a. Impellor (fan/blower) failure.
GAS MODELS ...
1) Low and/or inconsistent gas pressure.
Natural Gas pressure - must be between 3.5 and 4.0 inches of water column (W .C.).
L.P . (liquid propane) Gas pr essure - must be between 10.5 and 11.0 inches of water column (W .C.).
2) Poor air/gas mixture at burner (too much gas or not enough air) at the burner...yellow or poor
flame pattern ...
a. Not enough make-up air.
b. Restriction in the exhaust.
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3) Sail switch is fluttering ...
a) Lint screen is dirty or is not being cleaned often enough.
b) Restriction in the exhaust.
4) Failed burner hi-limit...opens at incorrect temperature.
5) Gas supply may have too low a heating value.
ELECTRIC MODELS ...
1) Not enough make-up air.
2) Restriction in the exhaust ...
3) Lint screen is dirty or is not being cleaned often enough.
4) Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
5) Failed electric element(s).
6) Sail switch is fluttering ...
a) Restriction in the exhaust.
b) Sail switch is not adjusted properly.
STEAM MODELS ...
1) Low steam pressure.
2) Insufficient make-up air.
3) Lint screen is dirty or is not being cleaned often enough.
4) Restriction in the exhaust.
5) Dirty steam coil ...
a) Fins are clogged with lint.
6) Steam damper system is not functioning properly.
a) Steam damper is sticking closed.
b) Leak in the pneumatic (air) system.
7. Extractors (water) are not functioning properly.
8. Failed lint chamber hi-heat switch (thermostat)...opens at incorrect temperature.
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9. Exceptionally cold/humid or low barometric pressure atmosphere.
10. Cycle temperature thermostats are covered with lint
NOTE: Lint accumulation on the sensor bracket can act as an insulator which will affect the
accuracy of the Automatic Drying Cycle.
K. Main burners are burning with a yellow flame (for Gas Models ONLY)...
1. Poor air/gas mixture (too much gas or not enough air) at the burner ...
a. Not enough make-up air.
b. Restriction in the exhaust.
c. Gas pressure is too high.
d. Impellor (fan/blower) is rotating in the wrong direction only (for 3ø Models ONLY).
e. Burner orifice size (D.M.S. [drill material size]) too large for application (i.e., high elevation).
L. Condensation on main door glass...
1. Too long, undersized, or improperly installed duct work.
2. Back draft damper is sticking in the partially closed position.
M. Scraping noise at basket (tumbler) area...
1. Check for obstruction caught in basket (tumbler)/wrapper area.
2. Basket (tumbler) is out of proper alignment ...
a. Check both the vertical alignment and lateral alignment.
b. Check for gap between the front panel and basket (tumbler)...bearing set screws may have come
loose, and basket (tumbler) walked forward or backward.
3. Loose basket (tumbler) tie rod.
4. Failed basket (tumbler) support.
N. Excessive noise and/or vibration...
1. Dryer is not leveled properly.
2. Impellor (fan/blower) out of balance ...
a. Excessive lint build up on impellor (fan/blower).
b. Failed impellor (fan/blower).
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3. Loose basket (tumbler) tie rod.
4. Basket (tumbler) out of adjustment, or adjustment bolts (hardware) are loose.
5. Failed basket (tumbler) support.
6. Loose motor mount.
7. Failed idler, basket (tumbler), or blower drive bearings.
8. V-belts too tight or too loose.
9. Bearing set screws (either basket [tumbler], idler, or blower shaft) are loose.
10. Failed motor bearing.
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ADC 113035 1- 03/06/98-50 2* 03/17/98-250 3* 05/05/98-250
4* 06/24/98-500 5* 10/27/98-250 6* 12/07/98-1,000
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