MDG-3 0 Fast Dry
In st allat ion an d Operat or’s Man u al
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.
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.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any
other appliance.
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.
WHAT DO YOU DO IF YOU SMELL GAS
QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
* 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.
* 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.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
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
MAYTAGCo.
403 West Fourth Street North
Newton, Iowa 50208
(515)792-7000
(Super MP Coin/OPL, DT 30)
011899JEV/cj
ADC Part No. 113069
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IMPORTANT
YOU MUSTDISCONNECT and LOCKOUTTHE ELECTRIC SUPPLYand THE GAS
SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUST-
ING, INSTALLATION, or TESTINGOFANY EQUIPMENT per OSHA (Occupational
Safety and HealthAdministration) STANDARDS.
«Attention: Lor des opérations d’entretien
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
CAUTION
DRYERS SHOULD NEVER BE LEFTUNATTENDEDWHILE IN OPERATION.
WARNING
CHILDREN SHOULD NOT BEALLOWED TO PLAYON OR NEARTHE DRYERS.
CHILDREN SHOULD BE SUPERVISED IFNEAR DRYERS IN OPERATION.
FOR YOUR SAFETY
DO NOT DRYMOPHEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRYCLEANING 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. PERSONALINJURYor FIRE COULD RESULT.
WARNING
DRYER MUST NEVER BE OPERATEDWITHOUTTHE LINT FILTER and SCREEN
IN PLACE, EVEN IFAN EXTERNALLINTCOLLECTION SYSTEM IS USED.
IMPORTANT
PLEASE OBSERVEALLSAFETYPRECAUTIONS 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.
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Table of Contents
SECTION I
IMPORTANT INFORMATION ............................................................................... 3
A. RECEIVING and HANDLING ....................................................................................................... 3
B. SAFETY PRECAUTIONS.............................................................................................................. 4
SECTION II
SPECIFICATIONS .................................................................................................... 6
SECTION III
INSTALLATION PROCEDURES........................................................................... 8
A. UNPACKING and SETTING UP ................................................................................................... 8
B. LOCATION REQUIREMENTS...................................................................................................... 9
C. DRYER ENCLOSURE REQUIREMENTS ................................................................................... 10
D. FRESHAIR SUPPLY .................................................................................................................... 11
E. EXHAUST REQUIREMENTS..................................................................................................... 12
F. ELECTRICALINFORMATION ................................................................................................... 18
G. GAS INFORMATION .................................................................................................................. 23
H. PREPARATION FOR OPERATION............................................................................................. 27
I. PREOPERATIONALTESTS ........................................................................................................ 28
J. PREOPERATIONALINSTRUCTIONS ....................................................................................... 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. RETURNINGWARRANTYCARDS ........................................................................................... 34
B. WARRANTY ................................................................................................................................ 34
SECTION VI
ROUTINE MAINTENANCE...................................................................................35
A. CLEANING .................................................................................................................................. 35
B. ADJUSTMENTS ........................................................................................................................... 36
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C. LUBRICATION............................................................................................................................. 36
SECTION VII
TROUBLESHOOTING ............................................................................................37
SECTION VIII
TECHNICAL INFORMATION...............................................................................44
A. DATALABEL ................................................................................................................................ 44
SECTION IX
PROCEDURE FOR FUNCTIONAL CHECK REPLACEMENT COMPONENTS ........... 46
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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, 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
and 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.
The manufacturer assumes no responsibility for freight claims or damages.
6. If you need assistance in handling the situation, please contact the manufacturer's traffic manager at (508)
678-9000.
IMPORTANT: The dryer must be transported and handled in an upright position at all times.
3
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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.
PERSONALINJURYor 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-30 Fast Dry 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
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WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvent will create a
fire hazard.
WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or
similarly textured rubberlike materials. Drying in a heated basket (tumbler) may damage
plastics or rubber and also may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct
work, and area around the back of the dryer. The frequency of inspection and cleaning can best be
determined from experience at each location.
WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire
hazard.
8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the
NATIONAL ELECTRIC CODE ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the CANADIAN
ELECTRICAL CODES PARTS 1 & 2 CSA C22.1-1990 or LATEST EDITION.
NOTE: Failure to do so will VOIDTHE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety
circuit, ever be disabled.
WARNING: PERSONALINJURYor 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 LOCKOUTTHE ELECTRIC SUPPLYand
THE GAS SUPPLYBEFOREANYCOVERS or GUARDSARE REMOVED
FROM THE MACHINE TOALLOWACCESS FOR CLEANING
,
ADJUSTING, INSTALLATION, orTESTING OFANYEQUIPMENT per
OSHA (Occupational Safety and HealthAdministration) STANDARDS.
5
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SECTION II
SPECIFICATIONS
A. SPECIFICATIONS
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** Specifications noted are for 50 Hz dryer models ONLY.
NOTE: Manufacturer reserves the right to make changes in specifications at any time without notice or
obligation.
6
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Specificat ion s
MDG-3 0
Fast Dry
NOTE: Manufacturer reserves the right to make changes in specifications at any time without notice or
obligation.
7
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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 or National Electric Code ANSI/NFPA NO. 70-
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 Installa-
tion 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: The key for the top control door, and bottom lint door is located in the information packaged
and shipped in the dryer's tumbler. This key 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 ALL MDG-30 Fast Dry model 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.
8
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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).
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 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
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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 above the dryer's outer top; 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.
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
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D. FRESH AIR SUPPLY
The MDG-30 Fast Dry air supply (makeup air) must be given careful consideration to assure proper perfor-
mance of each dryer. An unrestricted source of air is necessary for each dryer. As a general rule, an unre-
stricted 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. How-
ever, 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 opening) 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 VOIDTHEWARRANTY.
11
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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
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SINGLE DRYER VENTING
IMPORTANT: For exhaust duct runs over 30 feet a minimum size of 12 inches must be used.
HORIZONTAL VENTING
When horizontal single 10-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.
Illus. A
13
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VERTICAL VENTING
When vertical single venting is used minimum duct size is 12 inches (refer to Illus. B below), the duct work from
the dryer to the outside outlet cannot exceed 60 feet (refer to Illus. B below). This calculation compensates for
the use of a maximum of three (3) elbows including the two (2) elbows creating the 180° (turned downward)
outside outlet.
Illus. B
If the length of the duct run or quantity of elbows used exceeds the above noted specifications, the cross section
area of the duct work must be increased in proportion to the number of elbows or duct run added.
IMPORTANT: For extended duct work runs, the cross section area of the duct can only be increased
to an extent. For extended duct work runs, a professional HVAC firm should be
consulted for proper venting information.
14
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MULTIPLE DRYER (Common) VENTING
HORIZONTAL VENTING
If it is not feasible to provide separate exhaust ducts for each dryer, ducts for individual dryers may be channeled
into a common main duct. Each dryer is provided with a back draft damper. The individual ducts should enter the
bottom or side of the main duct at an angle not more than 45° in the direction of the airflow. No more than four
(4) dryers should be connected to one (1) main common duct run.
The main common duct may be any shape so long as the minimum cross-sectional area is provided. The main
duct should be tapered with the diameter increasing before each individual 10-inch duct is added (refer to Illus.
C and Illus. D).
Illus. C
Horizontal venting must not exceed 20 feet - this calculation compensates for the use of a maximum of only
one (1) elbow which is the outside outlet protection.
NOTE: Distance between dryer single ducts being connected to the main common duct must be a
minimum of 31-3/8" (dryer width).
Duct work should be laid out in such a manner where allowances are made at rear area of the
dryer for removal of rear service panels or guards.
15
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Illus. C (refer to the previous page 15}) shows the minimum cross-section area for horizontal multiple dryer
venting. These figures must be increased in proportion if the main duct run from the last dryer to where it
exhausts has numerous elbows or is unusually long.
IMPORTANT: For extended duct work runs, the cross-section area of the duct can only be increased
to an extent. For extended duct work runs, a professional HVAC firm should be
consulted for proper venting information.
VERTICAL VENTING
ILLUS. D
The maximum length of venting from the last dryer to where it exhausts...
Vertical venting must not exceed 25 feet - this calculation compensates for the use of a maximum of three (3)
elbows including the two (2) elbows creating the 180º (turned down
ward) outside outlet protection.
IMPORTANT: No more than four (4) dryers maximum should be connected to one (1) main
common duct with a vertical run.
NOTE: Distance between dryer single ducts being connected to the main common duct must be a
minimum of 31-3/8" (dryer width).
Duct work should be laid out in such a manner where allowances are made at rear area of the
dryer for removal of rear service panels or guards.
Illus. D shows the minimum cross-section area for vertical multiple dryer venting. These figures must be
increased in proportion if the main duct run from the last dryer to where it exhausts has numerous elbows or is
unusually long.
IMPORTANT: For extended duct work runs, the cross-section area of the duct can only be increased
to an extent. For extended duct work runs, a professional HVAC firm should be
consulted for proper venting information.
16
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IMPORTANTVENTINGREMINDERS
1. Duct work size and installation should be done by a qualified professional.
2. The dryer must be exhausted to the outdoors.
3. Duct work should be routed as short as possible to the outdoors with as few elbows as possible.
4. Avoid 90° turns, use 30° or 45° turns instead.
5. The size of the duct work must be a minimum of 12 inches if vented vertically and 10 inches if vented
horizontally.
6. The inside of the duct work should be as smooth as possible with no projections from sheet metal screws.
Ducts added should overlap the duct to which it is to be connected.
7. ALL ducts should be taped to prevent moisture and lint from escaping into the building.
8. Inspection or clean out doors should be installed throughout strategic points in the duct work for periodic
inspection and cleaning.
9. Wherever the duct passes through combustible materials, the opening must be 2 inches larger (all the way
around) than the duct. The duct must be centered within this opening.
10. The outside of the duct work must be protected from the weather. A 90° elbow must be used for horizontal
run and when vertically through a roof by using a 180° turn to point the opening downward. The distance
between the exhaust duct and the nearest obstruction (i.e., roof or ground) must be twice the diameter of the
duct.
11. DO NOT use screens or caps on the outside opening of the exhaust duct work.
12. Exhaust back pressure measured by a manometer at the dryer exhaust duct area must not exceed 0.3
inches of water column (W.C.).
13. WARNING -DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER and SCREEN
IN PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
14. Exhaust duct work outlets should not be located in an area directly where the makeup air openings are
located.
17
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F. ELECTRICAL INFORMATION
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 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).
IMPORTANT: Failure to comply with these codes or ordinances or the requirements stipulated in this
manual can result in personal injury or component failure.
NOTE: Component failure due to improper installation will VOIDTHEWARRANTY.
IMPORTANT: Each circuit must be connected to an independently protected branch circuit.
IMPORTANT: USE ONLY COPPER CONDUCTOR CABLE of proper ampicity and insulation in
accordance with electric codes for making service connections.
NOTE: The use of aluminum wire willVOID THEWARRANTY.
IMPORTANT: Aseparate circuit servicing each dryer must be provided.
2. Electrical Service Specifications
a. Electric Service
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 or 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: USE ONLY COPPER CONDUCTOR CABLE of proper ampicity and insulation in
accordance with electric codes for making service connections.
WARNING: 208 VAC and 230/240 VACARE NOT THE SAME. Any damage done to dryer
components due to improper voltage connections will automatically VOID THE
WARRANTY.
NOTE: On gas dryers, to convert from 208 VAC to 240 VAC (or visa versa), the
24VAC transformer wiring sequence must be changed.
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NOTE: Component failure due to improper voltage application will VOIDTHEWARRANTY.
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/NFPANO. 70-LATEST EDITION or in Canada, the installation must conform to applicable Ca-
nadian Standards: CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas).
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 nonmetallic 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
A wiring diagram is located inside the control box for connection data.
a. Gas Models ONLY
NOTE: ACIRCUIT SERVINGEACH DRYER
MUST BE PROVIDED.
1) Single-Phase (1ø) Wiring Connections and Hookup
The electrical input connections on ALL single-phase
(1ø) gas model dryers are made into the rear service
box located at the upper left area of the dryer.
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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
or 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.
20
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5. 3-Phase (3ø) Wiring Connections and Hookup
The only electrical input connections to the dryer are the 3-phase (3ø) power leads (L1, L2, L3, and some
times Neutral) and ground. Single-phase (1ø) the dryer. No single-phase (1ø) input connection is required on
a 3-phase (3ø) dryer.
IMPORTANT: ACIRCUIT SERVING EACH DRYER MUST BE PROVIDED.
a. Gas Model Dryers ONLY
1) 3-Phase (3ø) Wiring Connection and Hookup
For gas dryers manufactured for operation at 3-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
and contactor, the service box cover must be removed
Providing local codes permit, power to a gas dryer can be made by the use of a flexible U.L.
listed power cord or 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 and service box area.
CAUTION: The dryer must be grounded. Aground lug has been provided for this purpose.
IMPORTANT: ACIRCUIT SERVINGEACH DRYER MUST BE PROVIDED.
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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 or 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 VACARE NOT THE SAME.Any damage done to dryer
components due to improper voltage connections will automatically VOID THE
WARRANTY.
NOTE: Manufacturer reserves the right to make changes in specifications at any time, without notice or
obligation.
22
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G. GAS INFORMATION
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 CodeANSI 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).
IMPORTANT: FAILURE TO COMPLYWITH CODES or ORDINANCES, and/or
REQUIREMENTS IN THIS MANUAL, CAN RESULT IN PERSONAL
INJURYand IMPROPER OPERATION OFTHE 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 which will VOIDTHE 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, or in Canada, the CANADIAN ELECTRICAL CODES PARTS 1 & 2
CSA C22.1-1990 or 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 or gas indicated on the dryer label affixed behind the top
control door. If this information does not agree with the type of gas available, DO NOT operate the
dryer. Contact the Maytag distributor who sold the dryer or the Maytag Co.
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 require-
ments 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 Maytag distributor who sold the dryer or contact
the Maytag Co. factory.
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2. Technical Gas Data
a. Gas Specifications
TYPE OF GAS
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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) --- 176,000 (MDG-30D Fast Dry)
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 (W.C.)
pressure.
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 10.5 inches water column (W.C.). There is no regulator or
regulation provided in an L.P. dryer. The water column (W.C.) pressure must be regulated at the
source (L.P. tank) or an external regulator must be added to each dryer.
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24
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3. Piping Connections
ALL components and materials must conform to National or Canadian 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.
The dryer is provided with a 3/4" N.P.T. inlet pipe connection located in the upper rear area 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.
IMPORTANT: The gas supply line to each dryer must be a minimum of 3/4 inch. DO NOT
REDUCE THIS PIPE SIZE REQUIREMENT.
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.
NOTE: Undersized gas supply piping can create a low or inconsistent pressure which will result in
erratic operation of the burner ignition system.
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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.
Refer to the illustrations on the previous page (page 25).
NOTE: Awater column test pressure of 3.5 inches for natural gas and 10.5 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 WITHA FLAME!
ALL components and materials must conform to National or Canadian 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).
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H. PREPARATION FOR OPERATION and START-UP
The following items should be checked before attempting to operate the dryer:
1. Read ALL "CAUTION," "WARNING," and "DIRECTION" labels attached to the dryer.
2. Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label affixed
to the back side of the top front control and service door.
3. Check to assure that the dryer is connected to the type of heat or gas indicated on the dryer data label.
4. The sail switch damper assembly was installed and adjusted at the factory prior to shipping. However,
each sail switch adjustment must be checked to assure that this important safety control is functioning.
5. Check bolts, nuts, screws, terminals, and fittings for tightness.
6. Be sure that ALL gas shut-off valves are in the open position.
7. Check ALL back guard panels and service box covers have been replaced.
8. Make sure the lint coop support bracket has been removed.
9. Check the lint door to assure that it is closed and secured in place.
IMPORTANT: If during installation the lint door safety chain was disconnected, it must be
reconnected or personal injury may result.
10. Rotate the basket (tumbler and drum) by hand to be sure it moves freely.
11. Check bolts, nuts, screws, terminals, and fittings for security.
12. Check tumbler bearing set screws to ensure that they are ALL tight.
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I. 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.
2. Refer to the Operating Instructions for starting your particular model dryer.
3. GAS MODELS ONLY
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 model dryers are equipped with a Direct Spark Ignition (DSI) system which has internal
diagnostics. If ignition is not established after the first attempt, the heat circuit in the DSI module
will lock out until it is manually reset. To reset the DSI (Direct Spark Ignition) 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 (W.C.) pressure is correct and consistent.
NOTE: Water column (W.C.) pressure requirements (measured at the pressure tap of the gas valve
body):
Natural Gas ----------------- 3.5 Inches Water Column (W.C.)
Liquid Propane (L.P.) Gas ---10.5 Inches Water Column (W.C.)
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.
4. Make a complete operational check of ALL safety related circuits:
a. Door Switches
b. Hi-Limit thermostats
c. Cycling thermostat
d. GAS Models - Sail Switch
NOTE: The sail switch can be checked for proper operation by opening the lint door while heating
circuit (gas burner/electric oven) is active (on). The heating unit should shut off within a few
seconds. If not, make necessary adjustments to the sail switch.
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5. Make a complete operational check of ALL operating controls.
NOTE: If computer program changes are required, refer to the computer programming section of the
manual supplied with the dryer.
6. 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.
7. Check the electric service phase sequence (3-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
(impellor/fan) wheel should spin in the clockwise (CW) 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 and fan) is rotating in the wrong direction, this will not only
drastically reduce drying efficiency, but it can also cause premature component failure.
J. PREOPERATIONAL INSTRUCTIONS
COIN MODELS
1.Automatic Mode (Microprocessor [Computer] Models)
a. When turning on power or when no cycle is in progress, the L.E.D. (light emitting diode) display will read
"FILL" or "Amount to Start."
b. Insert coins.
Once correct "Amount to Start" has been inserted the L.E.D. (light emitting diode) display will read
"PUSH."
c. Select temperature by pushing "HI TEMP," "LO TEMP," or "PERM PRESS." The dryer will start, the
L.E.D. (light emitting diode) display will read the temperature cycle selected, and the drying time portion
of the L.E.D. (light emitting diode) display will read "00" and count upward as time elapses.
IMPORTANT: If the door is opened during a cycle, both the heat and motor will stop. However, the
microprocessor controller (computer) will continue to count downward in time.
Continuation of the cycle will resume only after the door has been closed and any
other of the three (3) temperature selection buttons is again depressed.
d. Once the preprogrammed dryness level and cool down period have been reached, or the maximum
automatic time has expired, the tone (buzzer) will sound for five (5) seconds, and the L.E.D. (light emitting
diode) display will read "donE," at which time the dryer will shut off.
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NOTES: 1. If theAnti-Wrinkle program is active, the L.E.D. (light emitting diode) display will continue
to read "donE", and the microprocessor controller (computer) will proceed through the
Anti-Wrinkle program until the maximum "Active GuardTime" has expired or until the door
is opened, whichever comes first. The L.E.D. (light emitting diode) display will read
"FILL" and/or "Amount to Start."
2. If theAnti-Wrinkle program is not active or in use, the L.E.D. (light emitting diode) display
will read "FILL" or "Amount to Start."
2. Timed Mode (Microprocessor [Computer] Models)
a. When turning on power or when no cycle is in progress, the L.E.D. (light emitting diode) display will read
"FILL" and/or "Amount to Start."
b. Insert Coins.
Once the correct "Amount to Start" has been inserted the L.E.D. (light emitting diode) display will read
"PUSH."
c. Select temperature by pushing "HI TEMP," "LO TEMP," or "PERM PRESS." The dryer will start, and
the L.E.D. (light emitting diode) display will read the temperature cycle selected and the drying time.
d. The dryer will continue through the drying and cooling cycles, showing time counting downward.
IMPORTANT: If the door is opened during a cycle, both the heat and motor will stop. However,
the microprocessor controller (computer) will continue to count down in time.
Continuation of the cycle will resume only after the door has been closed and any
other of the three (3) temperature selection buttons is again depressed.
e. Upon completion of drying and cooling cycles, the tone (buzzer) will sound for five (5) seconds, and the
L.E.D. (light emitting diode) display will read "donE," at which time the dryer will shut off.
NOTES: 1. If theAnti-Wrinkle program is active, the L.E.D. (light emitting diode) display will continue
to read "donE," and the microprocessor controller (computer) will proceed through the
Anti-Wrinkle program until the maximum "Active GuardTime" has expired or until the door
is opened, whichever comes first. The L.E.D. (light emitting diode) display will read
"FILL" or "Amount to Start."
2. If theAnti-Wrinkle program is not active or in use, the L.E.D. (light emitting diode) display
will read "FILL" or "Amount to Start."
3. Free Dry Mode (Microprocessor [Computer] Models)
a. When turning on power or when no cycle is in progress, the L.E.D. (light emitting diode) display will read
"FILL" or "FrEE."
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b. Select Temperature
The dryer will start, the L.E.D. (light emitting diode) display will read the temperature cycle selected, and
the drying time portion of the L.E.D. (light emitting diode) display will read "00" and count upward as time
elapses, or the vended time will count downward, depending on the program parameter setting.
IMPORTANT: If the door is opened during a cycle, both the heat and motor will stop. However, the
microprocessor controller (computer) will continue to count the time, either upward or
downward, depending on which parameter is programmed. Continuation of the cycle
will resume only after the door has been closed and any other of the three (3)
temperature selection buttons is again depressed.
c. Once the preprogrammed dryness level and cool down period has been reached or the maximum
automatic time has expired, whichever comes first, the tone (buzzer) will sound for five (5) seconds, and
the L.E.D. (light emitting diode) display will read "donE," at which time the dryer will shut off.
NOTES: 1. If theAnti-Wrinkle program is active, the L.E.D. (light emitting diode) display will continue
to read "donE," and the microprocessor controller (computer) will proceed through the
Anti-Wrinkle program until the maximum "Active GuardTime" has expired or until the door
is opened, whichever comes first. The L.E.D. (light emitting diode) display will read
"FILL" or "Amount to Start."
2. If theAnti-Wrinkle program is not active or in use, the L.E.D. (light emitting diode) display
will read "FILL" or "FrEE."
4. Non-Microprocessor (Computer) Models
a. Turn power on to the dryer.
b. Insert coins - rotary meter type ONLY.
c. Select temperature by using rocker switch and selecting "HI TEMP," "LO TEMP," or "PERM PRESS."
d. Press "Push to Start" button to start the cycle.
e. Upon completion of the drying and cooling cycles the dryer will shut off.
NOTE: If the door is opened during a cycle, both the heat and motor will stop. Continuation of the
cycle will only resume after the door has been closed, and the "Push to Start" button is
pressed.
OPL MODELS
1.To start the dryer:
a. Microprocessor (computer) dryers
1) The L.E.D. (light emitting diode) display will read "FILL."
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2) Press the "E" on the touchpad of the keyboard.
3) The L.E.D. (light emitting diode) display will quickly show "Ld30," "LC04," "F180." The dryer will
start, and the L.E.D. (light emitting diode) display will show "dr30."
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.
4) To stop dryer, open the main door.
K. SHUT DOWN INSTRUCTIONS
If the dryer is to be shut down (taken out of service) for a period of time, the following MUST BE performed;
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.
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SECTION IV
SERVICE and PARTS INFORMATION
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 Maytag Co. equipment was purchased. If the distributor
cannot be contacted or is unknown, contact the Maytag Co. Customer Service Department for a distribu-
tor in your area.
NOTE: When contacting the Maytag Co. Service Department, be sure to give them the correct model
and serial numbers so that your inquiry is handled in an expeditious manner.
B. PARTS
1. Replacement parts should be purchased from the distributor from whom the Maytag equipment was
purchased. If the distributor cannot be contacted or is unknown, contact the Maytag Co. for a distributor
in your area.
NOTE: When ordering replacement parts from the Maytag dealer be sure to give them the correct
model and serial numbers so that your parts order can be processed in an expeditious
manner.
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SECTION V
WARRANTYINFORMATION
A. RETURNING WARRANTY CARDS
1.Before any dryer leaves the manufacturer, a warranty card is affixed to the glass of the main door.
These warranty cards are intended to serve the customer as a record installation date of that specific
dryer so as to extend the customer's warranty period.
IMPORTANT: A separate warranty card must be completed and returned for each individual
dryer.
NOTE: Be sure to include the installation date when returning warranty cards.
2.For specific warranty information on your dryer, contact the Maytag distributor who sold you the dryer or call
the Maytag Co. at (515) 787-7000.
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SECTION VI
ROUTINE MAINTENANCE
A. CLEANING
A program 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 the
MDG-30 dryer will provide many years of efficient, trouble-free, and - most importantly - safe operation.
WARNING: LINT FROM MOST FABRICS IS HIGHLYCOMBUSTIBLE. THE
ACCUMULATION OFLINT CAN CREATEAPOTENTIALFIRE HAZARD.
WARNING: KEEPDRYERAREACLEARAND FREE FROM COMBUSTIBLE
MATERIALS, GASOLINE and OTHER FLAMMABLE VAPORS or
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.
WEEKLY
Clean lint accumulation from lint chamber, thermostat, and microprocessor temperature sensor (sensor bracket)
area.
WARNING: TOAVOID THE HAZARD OFELECTRICALSHOCK, DISCONTINUE
ELECTRICALSUPPLYTO THE DRYER.
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90 DAYS
Inspect and remove lint accumulation in customer-furnished exhaust duct work system from dryer's internal
exhaust ducting.
WARNING: THEACCUMULATION OFLINT IN THE EXHAUST DUCTWORK CAN
CREATEAPOTENTIALFIRE HAZARD.
WARNING: DO NOT OBSTRUCT THE FLOW OF COMBUSTION and VENTILATION AIR.
WARNING: INSPECT and REMOVEANY LINTACCUMULATION WHICH CAN CAUSE
THE BACK DRAFT 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 cabinets, avoid using harsh abrasives. Aproduct intended for the
cleaning of appliances is recommended.
B. ADJUSTMENTS
7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER
Inspect bolts, nuts, screws, (bearing set screws), nonpermanent 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).
C. LUBRICATION
The motor bearings, idler bearing, and under normal or most conditions the tumbler bearings are permanently
lubricated. It is physically possible to re-lubricate the tumbler bearings if you choose to do so even though this
practice is not necessary. Use ShellAlvania #3 or its equivalent. The tumbler bearings used in the dryer do not
have a grease fitting. Provisions are made in the bearing housing for the addition of a grease fitting which can be
obtained elsewhere, or from the manufacturer by ordering kit Part No. 882159, which includes two (2) fittings.
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SECTION VII
TROUBLESHOOTING
IMPORTANT: YOU MUST DISCONNECT and LOCKOUTTHE ELECTRIC SUPPLYand
THE GAS SUPPLYBEFOREANYCOVERS or GUARDSARE REMOVED
FROM THE MACHINE TOALLOWACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, or TESTINGOFANYEQUIPMENT per
OSHA(Occupational Safety and HealthAdministration) STANDARDS.
The information provided will help isolate the most probable components 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 and not necessarily the suspected component itself.
Electrical parts should always be checked for failure before being returned to the factory.
The information provided should not be misconstrued as a handbook for use by an untrained person making
repairs.
IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the fuse
being replaced.
WARNING: ALLSERVICE and TROUBLESHOOTINGSHOULD BE PERFORMED BY
AQUALIFIED PROFESSIONALOR SERVICEAGENCY.
WARNING: WHILE MAKINGREPAIRS, OBSERVEALLSAFETYPRECAUTIONS
DISPLAYED ON THE DRYER or SPECIFIED IN THIS MANUAL.
MICROPROCESSOR (COMPUTER) MODELS
A. No L.E.D. (light emitting diode) display
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 step down transformer (for models 380 volts or higher ONLY).
B. Drive motor not operating (does not start)
1. Failed drive motor contactor (relay).
2. Failed drive motor.
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3. Failed microprocessor controller (computer).
C. Drive motor operates okay for a few minutes, and 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 the motor.
c. Failed motor.
d. Basket (tumbler) is binding, check for obstruction.
e. Failed idler bearings or tumbler bearings.
f. Failed (out of balance) impellor (fan).
D. Blower motor not operating (does not start)
1. Failed blower motor contactor (relay).
2. Failed motor.
3. Failed microprocessor controller (computer).
E. Drive motor not operating (does not start) microprocessor controller (computer) motor indicator
dots are on
1. Fault in main door switch circuit.
2. Blown fuse (2-amp very fast acting fuse [if applicable]).
3. Failed microprocessor controller (computer).
4. Failed 24 VAC transformer.
F. Drive motor runs a few minutes and then stop, microprocessor controller (computer) display
continues to read time or percent of extraction and all indicator dots are off
1. Fault in main door switch circuit
a. Failed main door switch.
b. Main door switch out of adjustment.
c. Loose connection in door switch circuit.
G. Microprocessor (computer) display reads "dSFL"
1. Fault in microprocessor heat sensing circuit
a. Failed microprocessor temperature sensor.
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b. Failed microprocessor controller (computer).
c. Broken wire or connection somewhere between the microprocessor controller (computer) and the
microprocessor temperature sensor.
H. Microprocessor controller (computer) display reads "door"
1. Fault (open circuit) in door switch circuit
a. Failed main door switch.
b. Broken connection or wire in main door circuit.
2. Failed 24 VAC transformer.
I. Microprocessor controller (computer) will not accept any keyboard entries, i.e., L.E.D. (light
emitting diode) display reads "FILL" and when keyboard entries are selected, the L.E.D.
display continues to read "FILL"
1. Failed keyboard label (touch pad) assembly.
2. Failed microprocessor controller (computer).
J. Microprocessor controller will only accept certain keyboard entries
1. Failed keyboard label (touch pad) assembly.
2. Failed microprocessor controller (computer).
K. Microprocessor controller (computer) locks up and L.E.D. (light emitting diode) display reads
erroneous messages or only partial segments
1. Transient power voltage (spikes), disconnect power to dryer, wait one (1) minute, and reestablish
power to dryer. If problem is still evident
a. Failed microprocessor controller (computer).
b. Failed keyboard label (touch pad) assembly.
L. Dryer stops during a cycle and L.E.D. (light emitting diode) display returns to "FILL"
1. Fault in microprocessor heat sensor circuit
a. Loose connection in wires between temperature sensor and microprocessor controller (computer).
2. Loose connection somewhere in main power circuit to microprocessor controller (computer).
M. No heat, ignitor sparks, burner goes on and off right away
1. DSI (Direct Spark Ignition) ignitor and flame-probe out of adjustment, reposition closer to the flame area.
2. Sail switch is fluttering.
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a. Lint screen dirty.
b. Restriction in exhaust duct work.
3. Insufficient makeup air.
4. Failed ignitor and flame-probe assembly.
5. Failed Direct Spark Ignition (DSI) module.
6. Failed gas valve.
N. Heating unit is not operating (no heat) and heat indicator dot is on
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 exhaust.
2. Fault in burner hi-limit circuit or thermostat.
3. Fault in lint chamber sensor bracket hi-heat protector thermostat.
4. Failed Direct Spark Ignition (DSI) module.
5. Failed DSI (Direct Spark Ignition) ignitor and flame-probe assembly.
6. Failed microprocessor controller (computer).
O. Dryer operates but is taking too long to dry
1. Exhaust duct work run too long or is undersized, back pressure cannot exceed .3 inches water column
(W.C.).
2. Restriction in exhaust
a. Exhaust back draft damper is sticking partially closed.
b. Restriction in duct work, check duct work from dryer all the way to the outdoors.
3. Low or inconsistent gas pressure.
4. Insufficient makeup air.
5. Poor air and gas mixture at burner, yellow or poor flame pattern; adjust gas burner air adjustment shut
ters.
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6. Lint screen not being cleaned on a regular basis or often enough.
7. Extractors (washers) not performing properly.
8. Sail switch is fluttering, restriction in exhaust.
9. Failed microprocessor controller (computer), temperature calibration is inaccurate.
10. Failed microprocessor temperature sensor, calibration is inaccurate.
11. Failed burner or oven hi-limit.
12. Failed lint compartment hi-limit.
P. Condensation on main door glass
1. Too long, undersized, or improperly installed duct work.
2. Back draft damper is sticking in partially closed position.
Q. Dryer or scraping noise at basket (tumbler) area
1. Check for object caught in basket (tumbler) and wrapper area.
2. Basket (tumbler) is out of proper alignment
a. Check both vertical and lateral alignment.
b. Check gap between front panel and basket (tumbler) front, set screws may have come loose, and
basket (tumbler) walked forward or backwards.
3. Loose basket (tumbler) tie rod.
4. Failed basket (tumbler) support.
R. Excessive noise or vibration
1. Dryer not leveled properly.
2. Impellor (fan and blower) out of balance
a. Excessive lint build up on impellor (fan and blower).
b. Failed impellor (fan and blower).
3. Loose basket (tumbler) tie rod.
4. Basket out of adjustment, or adjustment bolts (hardware) are loose.
5. Failed basket (tumbler) support.
6. Loose motor mount.
7. Failed idler or tumbler bearings.
8. V-belts either too tight or too loose.
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S. Main burners are burning with a yellow flame
1. Burner air shutters are out of adjustment.
2. Insufficient makeup air.
3. Dust or lint in burner.
4. Insufficient gas pressure.
MECHANICAL COIN MODELS
A. Heating unit not operating (ALL temperature selections)
1. Fault in sail switch circuit
a. Sail switch out of adjustment or failed.
b. Sail switch not closing or fluttering
1) Check blower (impellor/fan) motor and rotation direction.
2) Restriction in location exhaust system.
2. Failed burner hi-limit circuit.
3. Failed lint compartment automatic (225º F [107º C]) safety thermostat circuit.
4. Failed heat selector switch.
B. Heat unit not operating for only one (1) temperature selection
1. Failed thermostat corresponding to selection made.
2. Failed heat selector switch
C. Dryer operates but is taking too long to dry load
1. Heating unit cycling on hi-limit thermostat
2. Housekeeping
a. Lint screen and lint compartment not being cleaned on a regular basis.
b. Lint accumulation in location exhaust system.
3. Insufficient makeup air.
4. Failed hi-limit thermostat
5. Failed lint compartment automatic (225º F [107º C]) safety thermostat circuit.
6. Extractors not performing properly.
7. Low or inconsistent gas pressure
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8. Gas supply may have low heating value
9. Sail switch is fluttering
a. Restriction in location exhaust system.
10. Exceptionally cold, humid or low barometric pressure atmosphere.
11. Blower (impellor and fan) motor rotation direction is incorrect. (3 phase models only)
D. Dryer is cycling on hi-limit thermostat
1. Blower (impellor and fan) motor failure.
2. Blower (impellor and fan) motor rotation direction is incorrect. (3 phase models only.)
3. Insufficient makeup air.
4. Restriction in location exhaust system
a. Undersized exhaust ducting.
5. Lint screen needs cleaning.
6. Failed hi-limit thermostat.
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SECTION VIII
TECHNICAL INFORMATION
A. DATA LABEL
Contact Maytag Company
When contacting the Maytag Co. certain information is required to ensure proper service and parts information
from the manufacturer. This information is on the data label located on the inside of the control door. When
contacting the Maytag Co. please have the model and serial numbers available.
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THE DATA LABEL
1. MODEL DRYER
The model number is a Maytag number which describes the size of the dryer and the type of heat.
2. SERIAL NUMBER
The serial number allows the manufacturer to gather information on your particular dryer.
3. MANUFACTURING CODE NUMBER
The manufacturing code number is a number issued by manufacturer 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
This describes the heat input in British Thermal Units per Hour (BTUH).
6. ORIFICE SIZE
Gives the number drill size used.
7. ELECTRIC SERVICE
This describes the electric service for your particular model.
8. GAS MANIFOLD PRESSURE
This describes the manifold pressure taken at the gas valve tap.
9. APPLICABLE APPROVAL SEALS
I.E., American Gas Association, Canadian Gas Association.
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SECTION IX
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 motors and the heat indicator dots, in the microprocessor (computer) L.E.D. (light
emitting diode) display are on. (Refer to the illustration below.)
d. Verify that motors heat, and door indicator lights on the back side of the microprocessor (computer
board are lit. (Refer to illustration below.)
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e. Open main door. The dryer must stop and ALL output indicator lights on the back side of the
microprocessor (computer) board must go out. (Refer to illustration on 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.
2. Direct Spark Ignition (DSI) System
a. Upon completing installation of the replacement
Direct Spark Ignition (DSI) module, reestablish
power to the dryer.
b. Start the drying cycle.
c. The ignition DSI (Direct Spark Ignition) module's
L.E.D. (light emitting diode) indicator will light "red"
for up to approximately 1.5 seconds (pre-purge time).
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 (Direct
Spark Ignition) module.
f. The burner flame must shut off and the ignition
module must lock out with the DSI (Direct Spark
Ignition) 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
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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MAYTAG-113069 1-01/29/99-250
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