American Dryer Corp MDG-50 User Manual
MDG-50
Installation 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
d’incendie ou d’explosion ou pour éviter tout
dommage matériel, toute blessure ou la mort.
Ne pas entreposer ni utiliser d’essence ni
d’autres 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 d’allumer d’appareil.
* 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.
L’installation et l’entretien doivent être assurés
par un installateur ou un service d’entretien
qualifié ou par le fournisseur de gaz.
For replacement parts, contact the distributor from which the dryer
was purchased or contact:
Maytag Co.
403 West Fourth St North
Newton, Iowa 50208
(515) 787-7000
122298SL/cj Part No. 113067
Retain This Manual In A Safe Place For Future Reference
Our 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 and 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. Manufacturer reserves the right
to make changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change
or discontinue models.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables dans le voisinage de cet
appareil ou de yout autre appareil.
Important
For your convenience, log the following information:
DATE OF PURCHASE MODEL NO.
DISTRIBUTORS NAME
Serial Number(s)
MDG-50
For replacement parts, contact the distributor from which the dryer was purchased or contact:
Maytag Co.
403 West Fourth St North
Newton, Iowa 50208
(515) 787-7000
“IMPORTANT NOTE TO PURCHASER”
Information must be obtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions must be posted in a
prominent location near the dryer.
IMPORTANT
YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS
SUPPLY BEFORE ANY COVERS or GUARDS ARE REMOVED FROM THE MACHINE
TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING
OF ANY EQUIPMENT per OSHA (Occupational Safety and Health Administration) STANDARDS.
«Attention: Lor des opérations d’entretien
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»
CAUTION
DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYERS.
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERATION.
FOR YOUR SAFETY
DO NOT DRY MOP HEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices
ever be disabled.
WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY or FIRE COULD RESULT.
WARNING
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER and SCREEN
IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment and
specified in the installation and operator's manual included with the dryer.
Dryers must not be installed or stored in an area where it will be exposed to water or weather.
The wiring diagram for the dryer is located in the front electrical control box area.
Table of Contents
SECTION I
IMPORTANT INFORMATION..........................................................................3
A. Receiving and Handling ............................................................................................................... 3
B. Safety Precautions ...................................................................................................................... 4
SECTION II
SPECIFICATIONS..............................................................................................6
A. Specifications ............................................................................................................................. 6
SECTION III
INSTALLATION PROCEDURES ......................................................................8
A. Unpacking and Setting Up .......................................................................................................... 8
B. Location Requirements ............................................................................................................... 9
C. Dryer Enclosure Requirements .................................................................................................. 10
D. Fresh Air Supply........................................................................................................................11
E. Exhaust Requirements ............................................................................................................... 12
F. Electrical Information ................................................................................................................ 18
G. Gas Information........................................................................................................................ 23
H. Preparation For Operation and Start-Up ................................................................................... 27
I. Preoperational Tests ................................................................................................................. 28
J. Preoperational Instructions ........................................................................................................ 29
K. Shut Down Instructions ............................................................................................................. 32
SECTION IV
SERVICE and PARTS INFORMATION ..........................................................33
A. Service ..................................................................................................................................... 33
B. Parts ........................................................................................................................................ 33
SECTION V
WARRANTY INFORMATION .........................................................................34
A. Returning Warranty Cards......................................................................................................... 34
SECTION VI
ROUTINE MAINTENANCE ............................................................................35
A. Cleaning ................................................................................................................................... 35
B. Adjustments ............................................................................................................................. 36
C. Lubrication ............................................................................................................................... 36
SECTION VII
TROUBLESHOOTING.....................................................................................37
Microprocessor (Computer) Models ............................................................................................... 37
Dual Timer Models ......................................................................................................................... 43
SECTION VIII
TECHNICAL INFORMATION ........................................................................46
A. Data Label ............................................................................................................................... 46
SECTION IX
REVERSING TIMER SPIN/DWELL ADJUSTMENTS..................................48
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS ................................................................................................49
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 packaging, and wooden
skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect
further before delivering carrier leaves.
If there are dryers damaged in shipment...
ALL dryers should be inspected upon receipt and before they are signed for.
1.
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. Dryers and parts damaged in transit cannot be claimed under warranty.
5. Freight claims are the responsibility of the consignee, and
Manufacturer assumes no responsibility for freight claims or damages.
6. If you need assistance in handling the situation, please contact the manufacturer traffic manager at (508)
678-9000.
ALL claims must be filed at the receiving end.
IMPORTANT: The dryer must be transported and handled in an upright position at all times.
3
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 or 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. Dryers must be exhausted to the outdoors.
6. Although the MDG-50 is 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,
or wax.
EXPLOSION COULD RESULT.
4
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvent will create a
fire hazard.
WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or
similarly textured rubberlike materials. Drying in a heated basket (tumbler) may damage
plastics or rubber and also may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct
work, and area around the back of the dryer. The frequency of inspection and cleaning can best be
determined from experience at each location.
WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire
hazard.
8. For personal safety, the dryer must be electrically grounded in accordance with local codes or the
NATIONAL ELECTRIC CODE ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the CANADIAN
ELECTRICAL CODES PARTS 1 & 2 CSA C22.1-1990 or LATEST EDITION.
NOTE: Failure to do so will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety
circuit, ever be disabled.
WARNING: PERSONAL INJURY or FIRE COULD RESULT.
10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.
11. Remove articles from the dryer as soon as the drying cycle has been completed.
WARNING: Articles left in the dryer after the drying and cooling cycles have been complete can create
a fire hazard.
12. 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.
13. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%) - 33 pounds/15 kg - of its rated capacity.
5
SECTION II
SPECIFICATIONS
A. SPECIFICATIONS
MA XIMU M C A P AC IT Y (DRY WEIGHT)50 lbs. 22.7 kg
BASKET
BASKET
BASKET
DOOR OPENIN G
BASKET
(TUMBLER) DIAMETER 32-3/4" 83.2 cm
(TUMBLER) DEPTH 37-1/2" 95.3 cm
(TUMBLER) MO TO R 3/4 HP * 0.560 kw
(DIAMETER)21-1/2"54.61 cm
(TUMBLER) VOLU ME 18.3 cu. ft. 0.518 cu.m.
DRYERS PER 20’/40’ CONTAINER 10/20
DRYER S PER 45’/48’ TRUCK 24/26
VO LTAGE AVAIL AB L E 120-460v 1ø - 3ø 3, 4w 50/60 Hz
APPROX. WEIGHT
APPROX. WEIGHT
HE AT INPU T 130,000 btuh
GAS
AIRFLOW 600 cfm
(UNCRATED)601 lbs. 272.6 kg
(CRATED)646 lbs.293 kg
32,760 kcal/hr
17 cmm
INLET PIPE CONNECTION 1/2" F.P.T.**
* 50 lbs. reversing dryer available with 3ø motors standard with 1/2 HP motors.
** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
NOTE: Manufacturer reserves the right to make changes in specifications at any time without notice or
obligation.
6
Specifications
MDG-50
NOTE: Manufacturer reserves the right to make changes in specifications at any time without notice or
obligation.
7
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:
ANSI Z223.1-LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO.70-LATEST EDITION (Na-
tional Electrical Code) or in Canada, the installation must conform to applicable Canadian Standards: CAN/
CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION (for General
Installation and Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for Electrical Connections).
A. UNPACKING and SETTING UP
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.
IMPORTANT: Dryer must be transported and handled in an upright position at all times.
NOTE: For OPL dryer models equipped with locks, the lock used is a dummy lock and no key is
supplied or needed. The lock can be turned with any key, a screwdriver, a small coin, or any
small sharp object. For coin-operated dryers, a key is provided, and (master key for both the
Control Door and Lint Door) should be made accessible because it will be needed throughout
various phases in the installation of the dryer.
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 lint coops of
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.
ALL MDG-50 model dryers are supported during shipping by a bracket. REMOVE THIS
8
B. 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 or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-
M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION (for General Installation and
Gas Plumbing) or Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION (for Electrical
Connections).
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.
9
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
twelve (12) inches above the dryer's outer top; eighteen (18) inches for locations with sprinkler systems, except
along the front of the dryer which may be closed if desired.
NOTE: Allowances must be made for opening the control door.
X = 12" minimum, 24" suggested for ease of maintenance.
* 1" maximum for electric dryers.
** 18" minimum for locations with sprinkler systems.
NOTE: Air considerations are important for proper and efficient operation.
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.
10
D. FRESH AIR SUPPLY
The MDG-50 air supply (makeup air) must be given careful consideration to assure proper performance of each
dryer. An unrestricted source of air is necessary for each 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. If registers or
louvers are installed over the openings, then the area must be increased. It is not necessary to have a separate
makeup air openings for each dryer. Common makeup air openings are acceptable. However, they must be set
up in such a manner that the makeup air is distributed equally to the dryers.
EXAMPLE: For a bank of eight (8) dryers, twelve (12) square feet; two (2) unrestricted openings
measuring 2 feet by 3 feet (6 square feet each) is acceptable.
IMPORTANT: Makeup air openings should not be located in an area directly near where exhaust
vents exit the building.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT: Makeup air must be provided from a source free of dry cleaning solvent fumes.
Makeup 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.
11
E. EXHAUST REQUIREMENTS
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, and shutdown of the burner
by the airflow (sail) switch, burner hi-limit, or lint chamber hi-heat protector thermostat.
Where possible, it is suggested to provide a separate (single) exhaust duct for each dryer.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
CAUTION: DRYER MUST BE EXHAUSTED TO THE OUTDOORS.
The exhaust 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. The shape of the duct work is not critical so long as the minimum cross
section area is provided. Single or independent dryer venting is recommended.
It is suggested that the use of 90° turns be avoided; use 30° or 45° angles instead.
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 ducts to be added should overlap the duct to which it is connected. ALL
duct work joints must be taped to prevent moisture and lint from escaping into the building. Additionally,
inspection doors should be installed at strategic points in the exhaust duct work for periodic inspection and
cleaning.
IMPORTANT: When connecting duct work to the dryer exhaust duct, be sure that when screws are
used they do not restrict the operation (both opening and closing) of the damper.
NOTE: When 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.
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 (i.e., roof or ground level).
IMPORTANT: DO NOT use screens or caps on the outside of opening of exhaust duct work.
IMPORTANT: Exhaust back pressure measured by a manometer at the dryer exhaust duct area must
not exceed 0.3 inches of water column (W.C.).
12
SINGLE DRYER VENTING
IMPORTANT: For exhaust duct runs over 30 feet a minimum size of 10 inches must be used.
HORIZONTAL V ENTING
When horizontal single 8-inch venting is used, the duct work to the outlet cannot exceed 30 feet (refer to Illus.
A below). This calculation of 30 feet compensates or allows for the use of a maximum of only one (1) elbow
(which is the outside outlet protection).
Illus. A
13
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