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MDG31 / MDG51 / MDG77
Installation/Operator Manual
WARNING: For your safety the information in this manual must be followed to minimize the risk of fire or explosion and to prevent property damage, personal injury or death.
— Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
— WHAT TO 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 à proximité de cet appareil ou de tout autre appareil.
—QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ:
●
●
●
●
●
Ne pas tenter d’allumer d’appareils.
Ne touchez à aucun interrupteur. Ne pas vous servir des téléphones se trouvant dans le bâtiment.
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.
RETAIN THESE
INSTRUCTIONS IN A
SAFE PLACE FOR
FUTURE REFERENCE
Part No. 113430-9
Retain This Manual in a Safe Place for Future Reference
This product embodies advanced concepts in engineering, design, and safety. If this product is properly maintained, it will provide many years of safe, efficient, and trouble free operation.
Only qualified technicians should service this equipment.
OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation manual included with the dryer.
The following “
FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence ni d’autres vapeurs ou liquides inflammables à proximité de cet appareil ou de tout autre appareil.
We have tried to make this manual as complete as possible and hope you will find it useful. The 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. The illustrations included in this manual may not depict your particular dryer exactly.
IMPORTANT
For your convenience, log the following information:
DATE OF PURCHASE _________________________________________________________ MODEL NO. _________________
DISTRIBUTOR’S NAME ____________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
_______________________________________________________________________________________________________
_______________________________________________________________________________________________________
For replacement parts, contact the distributor from which the dryer was purchased or contact:
Maytag Co.
403 West Fourth Street North, Newton, Iowa 50208
Telephone: (641) 787-7000
2
“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.
Maytag Co.
113430 - 9
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 standards.
Please observe all safety precautions displayed on the equipment and/or specified in the installation manual included with the dryer.
Before installation, check that the local distribution conditions, nature of gas and pressure, and adjustment of the appliances are compatible.
CAUTION
Dryer(s) should never be left unattended while in operation.
“Caution: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper operation.”
«Attention: Au moment de l’entretien des commandes, étiquetez tous les fils avant de les débrancher. Des erreurs de câblage peuvent entraîner un fonctionnement inadéquat et dangereux.»
WARNING
Children should not be allowed to play on or near the dryer(s). Children should be supervised if near dryer(s) in operation.
Under no circumstances should the dryer door switch(es), lint door/drawer switch(es), or heat safety circuit(s) ever be disabled.
The dryer must never be operated with any of the back guards, outer tops, or service panels removed. Personal injury or fire could result.
The dryer must never be operated without the lint filter/screen in place, even if an external lint collection system is used.
FOR YOUR SAFETY
Do not dry mop heads in the dryer. Do not use dryer in the presence of dry cleaning fumes.
The dryers must not be installed or stored in an area where it will be exposed to water and/or weather.
The wiring diagram for the dryer is located behind the control panel.
113430 - 9
Table of Contents ________
Safety Precautions ................................ 4
MDG31 Specifications........................... 6
MDG51 Specifications........................... 8
MDG77 Specifications.........................10
Installation Procedures ......................12
Location Requirements ......................................... 12
Unpacking/Setting Up ........................................... 12
Dryer Enclosure Requirements ............................. 12
Fresh Air Supply Requirements ............................ 13
Exhaust Requirements ......................................... 13
Electrical Information ............................................ 15
Gas Information .................................................... 17
Converting from One Family of Gas to Another ..... 19
Gas Pressure Testing ........................................... 21
Water Information ................................................. 21
Preparation for Operation/Start-Up ........................ 22
Preoperational Test ............................................... 22
Preoperational Instructions ................................... 23
Shutdown Instructions .......................................... 23
Service/Parts Information ..................23
Service .................................................................. 23
Parts ..................................................................... 23
Warranty Information .........................24
Returning Warranty Cards..................................... 24
Warranty ............................................................... 24
Routine Maintenance ..........................24
Cleaning ................................................................ 24
Data Label Information .......................25
List of Acronyms _____________________________
HVAC Heating, Ventilating, and Air-Conditioning in wc Inches of Water Column
L.C.D.
Liquid Crystal Display
L.E.D.
Light Emitting Diode
L.P.
Liquid Propane
OSHA Occupational Safety and Health Administration
UL Underwriters Laboratory
Telephone: (641) 787-7000 3
4
Safety Precautions ____________________
Warning
!
For your safety, the information in this manual must be followed to minimize the risk of fire or explosion and to prevent property damage, personal injury, or loss of life.
The dryer must never be operated with any of the back guards, outer tops, or service panels removed. Personal injury or fire could result.
Failure to properly install, maintain, and/or operate dryer according to this manual and operator’s manuals included with dryer may result in conditions which can cause serious injury, death and/or property damage.
Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
Purchaser and 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.
What To 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 gas supplier.
Dryers must be exhausted to the outdoors.
Although the manufacturer produces a very versatile dryer, 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, combustible detergents, or “all purpose” cleaner.
Explosion could result.
Do not dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint, or wax. Explosion could result.
Items that have been spotted or soaked with vegetable or cooking oil constitute a fire hazard and should not be placed in a tumble dryer.
Do not dry mop heads. Contamination by wax or flammable solvents will create a fire hazard.
Do not use heat for drying articles that contain plastic, foam, sponge rubber, or similarly textured rubber materials. Drying in a heated tumbler may damage plastics or rubber and also may be a fire hazard.
A program should be established for the inspection and cleaning of lint in the burner area, exhaust ductwork, and area around the back of the dryer. The frequency of inspection and cleaning can best be determined from experience at each location.
Warning
!
hazard.
The collection of lint in the burner area and exhaust ductwork can create a potential fire
For personal safety, the dryer must be electrically grounded in accordance with local and/or country codes. In the absence of these codes use the National Electrical 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 electrically ground the dryer properly will void the warranty.
Warning
!
Personal injury or fire could result should the dryer door switch, lint door/drawer, or heat safety circuit ever be disabled.
Remove articles from the dryer as soon as the drying cycle has been completed.
Warning
!
hazard.
Articles left in the dryer after the drying and cooling cycles have been completed can create a fire
For safety, proper operation, and optimum performance, the dryer must not be operated with a load less than 66% of its rated capacity.
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 standards.
Important
!
The dryer must be installed in a location/ environment, which the ambient temperature remains between 40° F (4.44° C) and 130° F (54.44° C).
The operation of this appliance may affect the operation of other types of gas appliances, which take their air for safe combustion from the same room. If in doubt, consult the appliance manufacturer(s).
Use this dryer only for its intended purpose, drying fabrics.
The “Cool Down” Cycle of tumble dryers should be used to reduce the temperature of the items. They should not be removed from the tumble dryer or piled or stacked while hot.
Fabric softeners or similar products should not be used in a tumble dryer to eliminate the effects of static electricity, unless this practice is specifically recommended by the manufacturer of the fabric softener or product.
Maytag Co.
113430 - 9
!
Warning
To reduce the risk of personal injury, install lockable doors to prevent public access to the rear of the dryers.
Exhaust duct outlet should be checked periodically for blockages, and if any found, removed.
Important
!
A means of restraint must be used to prevent straining of the gas supply when the appliance is moved.
An external means of power removal (disconnect device) must be provided by the installer.
CE ONLY
Important
!
This appliance must only be installed and operated in the country of destination indicated on the dryer’s data plate. If the appliance is to be installed and operated in a country other than the one indicated on the data plate, a data plate amendment must be obtained from
Maytag.
Warning
!
This appliance must only operate with the gas type indicated on the dryer’s data plate. If the appliance is converted (gas type is changed), a data plate amendment must be obtained from Maytag.
This appliance may cause spillage of products of combustion from an open-flue appliance fitted in the same room, and that such an appliance shall be tested for clearance of products with the appliance in operation and all windows and doors closed.
NOTES ____________________________________
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113430 - 9 Telephone: (641) 787-7000
NOTES ____________________________________
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5
6
MDG31 Specifications ________________________________________________________________
!
MAXIMUM CAPACITY (DRY WEIGHT)
TUMBLER DIAMETER
TUMBLER DEPTH
TUMBLER VOLUME
TUMBLER/DRIVE MOTOR
BLOWER/FAN MOTOR
DOOR OPENING (DIAMETER)
DOOR SILL HEIGHT
WATER CONNECTION
DRYERS PER 20’/40’ CONTAINER
DRYERS PER 48’/53’ TRUCK
VOLTAGE AVAILABLE
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
HEAT INPUT
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
INLET PIPE CONNECTION
VOLTAGE AVAILABLE
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
OVEN SIZE kW Btu/hr
VOLTAGE AVAILABLE
kcal/hr
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
STEAM CONSUMPTION
OPERATING STEAM PRESSURE
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
BOILER HORSEPOWER (NORMAL LOAD)
SUPPLY CONNECTION
RETURN CONNECTION
Shaded areas are stated in metric equivalents
30 lb
30”
13.61 kg
76.20 cm
27”
11.04 cu ft
1/4 hp
1/2 hp
19-3/8”
14-7/8”
N / A
12 / 28
34 / 38
120V 1ø 2w 60 Hz
285 lb
310 lb
360 cfm
68.58 cm
312.62 L
0.18 kW
0.37 kW
49.23 cm
37.78 cm
129.27 kg
140.61 kg
10.19 cmm
55,000 Btu/hr
6”
13,860 kcal/hr
N / A
N / A
1/2” M.N.P.T.
15.24 cm
N / A
N / A
5/13/05
Note
The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.
Maytag Co.
113430 - 9
MDG31 Specifications ________________________________________________________________
113430 - 9 Telephone: (641) 787-7000 7
MDG51 Specifications _________________________________________________________________
8
!
MAXIMUM CAPACITY (DRY WEIGHT)
TUMBLER DIAMETER
TUMBLER DEPTH
TUMBLER VOLUME
TUMBLER/DRIVE MOTOR
BLOWER/FAN MOTOR
DOOR OPENING (DIAMETER)
DOOR SILL HEIGHT
WATER CONNECTION
DRYERS PER 20’/40’ CONTAINER
DRYERS PER 48’/53’ TRUCK
VOLTAGE AVAILABLE
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
HEAT INPUT
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
INLET PIPE CONNECTION
50 lb
37”
25-3/4”
16.02 cu ft
1 hp
1/2 hp
27-3/8”
16”
22.68 kg
93.98 cm
65.41 cm
453.64 L
0.75 kW
0.37 kW
69.55 cm
40.64 cm
3/4”-11.5 NH (North America)
3/4” B.S.P.T. (Outside North America)
10 / 22
28 / 30
120V 1ø 2w 60 Hz
545 lb
565 lb
525 cfm
90,000 Btu/hr
8”
247.21 kg
256.28 kg
14.87 cmm
22,680 kcal/hr
20.32 cm
N / A
N / A
1/2” M.N.P.T.
1/2” F.B.S.P.T. (CE and Australia Only)
VOLTAGE AVAILABLE
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME kW
OVEN SIZE
Btu/hr
VOLTAGE AVAILABLE
kcal/hr
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
STEAM CONSUMPTION
OPERATING STEAM PRESSURE
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
BOILER HORSEPOWER (NORMAL LOAD)
SUPPLY CONNECTION
RETURN CONNECTION
Shaded areas are stated in metric equivalents
N / A
N / A
11/23/05
Note
The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.
Maytag Co.
113430 - 9
MDG51 Specifications _________________________________________________________________
113430 - 9 Telephone: (641) 787-7000 9
MDG77 Specifications ______________________________________________________________
10
!
MAXIMUM CAPACITY (DRY WEIGHT)
TUMBLER DIAMETER
TUMBLER DEPTH
TUMBLER VOLUME
TUMBLER/DRIVE MOTOR
BLOWER/FAN MOTOR
DOOR OPENING (DIAMETER)
DOOR SILL HEIGHT
WATER CONNECTION
DRYERS PER 20’/40’ CONTAINER
DRYERS PER 48’/53’ TRUCK
VOLTAGE AVAILABLE
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
HEAT INPUT
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
INLET PIPE CONNECTION
75 lb
37”
35-1/2”
22.09 cu ft
1 hp
1/2 hp
27-3/8”
16”
34.02 kg
93.98 cm
90.17 cm
625.52 L
0.75 kW
0.37 kW
69.53 cm
40.64 cm
3/4”-11.5 NH (North America)
3/4” B.S.P.T. (Outside North America)
120V 1ø 2w 60 Hz
600 lb
272.16 kg
620 lb
560 cfm
110,000 Btu/hr
8”
9 / 20
25 / 27
281.23 kg
15.86 cmm
27,720 kcal/hr
20.32 cm
N / A
N / A
1/2” M.N.P.T.
1/2” F.B.S.P.T. (CE and Australia Only)
VOLTAGE AVAILABLE
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
OVEN SIZE kW Btu/hr
VOLTAGE AVAILABLE
kcal/hr
APPROXIMATE NET WEIGHT
APPROXIMATE SHIPPING WEIGHT
AIRFLOW
STEAM CONSUMPTION
OPERATING STEAM PRESSURE
EXHAUST CONNECTION (DIAMETER)
COMPRESSED AIR CONNECTION
COMPRESSED AIR VOLUME
BOILER HORSEPOWER (NORMAL LOAD)
SUPPLY CONNECTION
RETURN CONNECTION
Shaded areas are stated in metric equivalents
N / A
N / A
11/23/05
Note
The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.
Maytag Co.
113430 - 9
MDG77 Specifications ______________________________________________________________
113430 - 9 Telephone: (641) 787-7000 11
Installation Procedures _______________
Installation should be performed by competent professional in accordance with local, state, and country 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 (National 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).
Location Requirements _______________
Before installing the dryer, be sure the location conforms to local, state, and country codes. 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).
The dryer must be installed on a sound level floor capable of supporting its weight. Carpeting must be removed from the floor area that the dryer is to rest on.
The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.
Dryers installed in residential garages must be elevated
18-inches (45.72 cm) above the floor.
Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply Requirements section).
Clearance provisions must be made from combustible construction as noted in this manual (refer to Dryer Enclosure
Requirements section).
Provisions must be made for adequate clearances for servicing and for operation as noted in this manual (refer to
Dryer Enclosure Requirements section).
The dryer must be installed with a proper exhaust duct connection to the outside as noted in this manual (refer to
Exhaust Requirements section).
The dryer must be located in an area where correct exhaust venting can be achieved as noted in this manual (refer to
Exhaust Requirements section).
!
Important
The dryer should be located where a minimum amount of exhaust ducting will be necessary.
The dryer must be installed with adequate clearance for air openings into the combustion chamber.
Caution
!
This dryer produces combustible lint and must be exhausted to the outdoors. Every 6 months, inspect the exhaust ducting and remove any lint buildup.
Important
!
The dryer must be installed in a location/ environment, which the ambient temperature remains between 40° F (4.44° C) and 130° F (54.44° C).
12 Maytag Co.
Unpacking/Setting Up _________________
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from the dryer.
!
Important
Dryer must be transported and handled in an upright position at all times.
The dryer can be moved to its final location while still attached to the skid or with the skid removed. To remove the skid from the MDG31, MDG51, or MDG77, locate and remove the 2 bolts securing the base of the dryer to the wooden skid. One is located at the center rear and the other is at the center front.
With the skid removed, use caution and assure all four leveling legs are fully retracted if the dryer is to be slid into its final position.
Leveling Dryer
The dryer is equipped with 4 leveling legs, 1 at each corner of the base. For optimum performance the dryer should be level front-to-back and side-to-side.
Dryer Enclosure Requirements _______
Commercial Type II (MDG31, MDG51, MDG77)
Bulkheads and partitions should be made of noncombustible material.
!
Note
Allowances must be made for opening the control door.
A The requirement to allow the door to open completely for the MDG31 is 33-inches (83.8 cm), and the MDG51 and
MDG77 are 40-inches (101.6 cm).
B A minimum overhead clearance of 6-inches (15.24 cm) is required.
C Dryer should be positioned a minimum of 12-inches
(30.48 cm) away from the nearest obstruction. 24-inches
(60.96 cm) is recommended for ease of installation, maintenance, and service.
D 1/16” (1.5875 mm) minimum is required.
E Flooring should be level or below dryer cabinet for ease of removing panels during maintenance.
F Dryers may be positioned sidewall to sidewall, however a 1/16” (1.5875 mm) minimum allowance must be made for the opening and closing of the control door, along with the removal of panels during maintenance.
113430 - 9
Domestic Type I (MDG31, MDG51 Only)
A = 6-inches (15.24 cm) B = 24-inches (60.96 cm)
EXAMPLE: For MDG51, 2 unrestricted openings measuring
6-inches by 24-inches (15.24 cm by 60.96 cm) are acceptable.
If a closet door is installed: unobstructed air openings are required. The air openings shall be located 3-inches
(7.62 cm) from the lower opening (above floor level) and upper opening (below ceiling). The total free area of the air openings in the door shall not be less than 179 inch
2
(1154.836 cm
2
) for MDG31; and 293 inch
2
(1890.319 cm
2
) for MDG51.
Louvered doors with equivalent air openings are acceptable.
No other fuel-burning appliance shall be installed in the same closet as the dryer.
!
A = 10-inches (25.4 cm)
Important
B = 11-inches (27.94 cm)
EXAMPLE: For a bank of 4 MDG31 dryers, 2 unrestricted openings measuring 10-inches by 11-inches (25.4 cm by
27.94 cm) are acceptable.
Make-up air must be free of dry cleaning solvent fumes. Make-up air that is contaminated by dry cleaning solvent fumes will result in irreparable damage to the motors and other dryer components.
Fresh Air Supply Requirements _______
When the dryer is operating, it draws in room air, heats it, passes this air through the tumbler, and exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and sail switch “fluttering” problems may result, as well as premature motor failure from overheating. The dryer must be installed with provisions for adequate combustion and make-up air supply.
Air supply (make-up air) must be given careful consideration to ensure proper performance of each dryer. As a general rule, an unrestricted air entrance from the outdoors of 110 inch
2
(710 cm
2
) is required for each MDG77, 90 inch
2
(580 cm
2
) for each MDG51, 55 inch
2
(354 cm
2
) for each MDG31.
(Based on 1 inch 2 [6.5 cm 2 ] per 1,000 Btu [252 kcal].)
It is not necessary to have a separate make-up air opening for each dryer. Common make-up air openings are acceptable. However, they must be set up in such a manner that the make-up air is distributed equally to all the dryers.
To compensate for the use of registers or louvers used over the openings, this area must be increased by approximately
33%. Make-up 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 high altitudes or predominantly low pressure areas.
!
Note
Component failure due to dry cleaning solvent fumes will void the warranty.
113430 - 9 Telephone: (641) 787-7000
Exhaust Requirements ________________
Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork 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-limits, or lint chamber hi-limit protector thermostat. The dryer must be installed with a proper exhaust duct connection to the outside.
The dryer shall not be exhausted into any gas vent, chimney, wall, ceiling or concealed space of a building.
Caution
!
This dryer produces combustible lint and must be exhausted to the outdoors.
Improperly sized or installed exhaust ductwork can create a potential fire hazard.
The ductwork should be laid out in such a way that the ductwork travels as directly as possible to the outdoors with as few turns as possible. There should be a minimum
6-inch (15.24 cm) clearance between the back guard and the first bend in the ductwork for ease of servicing. Single or independent dryer venting is recommended. It is suggested that the use of 90° turns be avoided; use 30° and/or 45° bends instead. The radius of the elbows should preferably be 1-1/2 times the diameter of the duct. All ductwork should be smooth inside with no projections from sheet metal screws or other obstructions, which will collect lint. When adding ducts, overlap the duct being connected. All ductwork joints must be taped to prevent moisture and lint from escaping into the building. Back draft dampers must be installed in all commonly ducted systems. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic inspection and cleaning of lint from the ductwork.
!
Important
It is recommended that exhaust or booster fans not be used in the exhaust ductwork system.
13
Important
!
Exhaust back pressure measured by a manometer/magnehelic in the exhaust duct must be no less than 0 and must not exceed 0.6 in wc (1.48 mb).
Note
!
opening must be 2-inches (5.08 cm) larger than the duct
(all the way around). The duct must be centered within this opening.
When the exhaust ductwork passes through a wall, ceiling, or roof made of combustible materials, the
As per the National Fuel Gas Code, “Exhaust ducts for type
2 clothes dryers shall be constructed of sheet metal or other noncombustible material. Such ducts shall be equivalent in strength and corrosion resistance to ducts made of galvanized sheet steel not less than 26 gauge
(0.0195-inches [0.50 mm]) thick.”
The ductwork for this appliance must be suitable for the appliance category in accordance with national installation regulations of the country of destination.
Outside Ductwork Protection
To protect the outside end of the horizontal ductwork from the weather, a 90° elbow bent downward should be installed where the exhaust exits the building. If the ductwork 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 (refer to the diagram).
!
Important
Do not use screens, louvers, or caps on the outside opening of the exhaust ductwork.
Single Dryer Venting
Important
!
For extended ductwork runs, the cross-sectional area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits as noted in this manual, a professional HVAC firm should be consulted for proper venting information.
Horizontal Venting
When horizontal dryer venting is used, the length of the ductwork from the dryer to the outside exhaust outlet, must not exceed 20 feet (6.10 meters). The minimum diameter of this ductwork must be at least 6-inches (15.24 cm) for MDG31, and 8-inches (20.32 cm) for MDG51 and MDG77. Including tumbler/dryer elbow connections or elbows used for outside protection from the weather, no more than 1 elbow should be used in the exhaust duct run. If more than 1 elbow is used, the cross-sectional area of the ductwork must be increased.
14
Vertical Venting
When vertical dryer venting is used, the length of the ductwork from the dryer to the outside exhaust outlet, must not exceed
12 feet (3.66 meters). The minimum diameter of this ductwork must be at least 6-inches (15.24 cm) for MDG31, and 8-inches
(20.32 cm) for MDG51 and MDG77. Including tumbler/dryer elbow connections or elbows used for outside protection from the weather, no more than 3 elbows should be used in the exhaust duct run. If more than 3 elbows are used, the cross-sectional area of the ductwork must be increased.
A = 20 feet (6.10 meters)
B = MDG31: 6-inches (15.24 cm)
MDG51, MDG77: 8-inches (20.32 cm)
C = 12 feet (3.66 meters)
D = MDG31: 6-inches (15.24 cm)
MDG51, MDG77: 8-inches (20.32 cm)
NOTE 1 Opening from combustible materials must be 2-inches (5.08 cm) larger than the duct (all the way around). The duct must be centered within this opening.
NOTE 2 Distance should be 2 times the diameter of the duct to the nearest obstruction.
Multiple Dryer (Common) Venting
Important
!
For extended ductwork runs, the cross-sectional area of the ductwork can only be increased to an extent. When the ductwork approaches the maximum limits as noted in this manual, a professional HVAC firm should be consulted for proper venting information.
If it is not feasible to provide separate exhaust ducts for each dryer, ducts from individual dryers may be channeled into a
“common main duct.” The individual ducts should enter the bottom or side of the main duct at an angle not more than 45º in the direction of airflow. The main duct should be tapered, with the diameter increasing before each individual duct is added.
Maytag Co.
113430 - 9
!
Important
No more than 4 dryers should be connected to 1 main common duct.
The illustration below shows the minimum cross-sectional area for multiple dryer round or square venting. These figures must be increased if the main duct run from the last dryer to where it exhausts to the outdoors is longer than 12 feet (3.66
meters) or has more than 1 elbow in it.
A = MDG31 6-inch (15.24 cm)
MDG51 8-inch (20.32 cm)
MDG77 8-inch (20.32 cm)
B = 12 feet (3.66 meters)
NOTE 1 Opening from combustible materials must be 2-inches (5.08 cm) larger than the duct (all the way around). The duct must be centered within this opening.
NOTE 2 Distance should be 2 times the diameter of the duct to the nearest obstruction.
Multiple Dryer Venting with 6-Inch (15.24 cm) Diameter
360 cfm (10.19 cmm) Exhaust Connections at Common Duct
NUMBER OF DRYERS
MINIMUM CROSS-
SECTIONAL AREA
4
SQ IN 80
SQ CM 516.1
MINIMUM ROUND
DUCT DIAMETER
IN
CM
10
25.4
3
80
516.1
10
25.4
2
54
348.4
8
20.32
1
30
193.55
6
15.24
Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
525 cfm (14.87 cmm) Exhaust Connections at Common Duct
NUMBER OF DRYERS
MINIMUM CROSS-
SECTIONAL AREA
SQ IN
SQ CM
4
120
774.2
MINIMUM ROUND
DUCT DIAMETER
IN
CM
12
30.48
3
120
774.2
12
30.48
2
80
516.1
10
25.4
1
54
348.4
8
20.32
Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter
560 cfm (15.86 cmm) Exhaust Connections at Common Duct
NUMBER OF DRYERS
MINIMUM CROSS-
SECTIONAL AREA
MINIMUM ROUND
DUCT DIAMETER
SQ IN
SQ CM
IN
CM
4
120
774.2
12
30.48
3
120
774.2
12
30.48
2
80
516.1
10
25.4
1
54
348.4
8
20.32
Electrical Information _________________
Electrical Requirements
All electrical connections must be made by a properly licensed and competent electrician. This is to ensure that the electrical installation is adequate and conforms to local, state, and national regulations or codes of the country of origin. In the absence of such codes, all electrical connections, materials, and workmanship must conform to the applicable requirements of the National Electrical Code ANSI/NFPA NO.
70-LATEST EDITION or in Canada, the Canadian Electrical
Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
Important
!
Failure to comply with these codes or ordinances, and/or the requirements stipulated in this manual can result in personal injury or component failure.
!
Note
Component failure due to improper installation will void the warranty.
Each dryer should be connected to an independently protected branch circuit. The dryer must be connected with copper wire only. Do not use aluminum wire, which could cause a fire hazard. The copper conductor wire/cable must be of proper ampacity and insulation in accordance with electric codes for making all service connections.
Note
!
The use of aluminum wire will void the warranty.
An individual ground circuit must be provided to each dryer, do not daisy chain.
Component failure due to improper voltage application will void the warranty.
The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.
Important
!
A separate protected circuit must be provided to each dryer.
The dryer must be connected to the electric supply shown on the data label. In the case of 208 VAC or 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 240 VAC are not the same. Any damage done to dryer components due to improper voltage connections will automatically void the warranty.
113430 - 9 Telephone: (641) 787-7000 15
Warning (Gas Models Only)
!
Dryers built for use with a voltage between 200 and 240 must verify the input voltage during installation. If the nominal voltage is outside of the medium tolerances shown on the diagram below, adjust the autotransformer, located near the burner assembly. To adjust the autotransformer wiring, place the red wire on the appropriate tap (HIGH, MED, LOW) of the autotransformer.
For additional wiring details, refer to the electrical diagram located on the inside of the control panel.
TERM
HIGH
MED
LOW
LINE VOLTAGE
50 Hz
260
226
239
208
217
189
60 Hz
283
249
260
230
236
208
Electrical Service Specifications
Gas Models Only
ELECTRICAL SERVICE SPECIFICATIONS
IMPORTANT: 208 VAC AND 230/240 VAC ARE NOT THE SAME. When ordering, specify exact voltage.
NOTES: A.
B.
C.
SERVICE
VOLTAGE
120
120
120
When fuses are used they must be dual element, time delay, current limiting, class RK1 or RK5 ONLY. Calculate/determine correct fuse value, by applying either local and/or National Electrical Codes to listed appliance amp draw data.
Circuit breakers are thermal-magnetic (industrial) motor curve type
ONLY. For others, calculate/verify correct breaker size according to appliance amp draw rating and type of breaker used.
Circuit breakers for 3-phase (3ø) dryers must be 3-pole type.
PHASE
1ø
1ø
1ø
WIRE
SERVICE
APPROX.
AMP DRAW
MD G31
60 Hz 50 Hz
2
MD G51
10.3
—
2
MD G7 7
15.6
—
2 15.6
—
CIRCUIT
BREAKER
15
20
20
2/15/08
Grounding
A ground (earth) connection must be provided and installed in accordance with local, state, and national regulations or codes of the country of origin. In the absence of these codes, grounding must conform to applicable requirements of the
National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the installation must conform to applicable
Canada Standards: Canadian Electrical Codes Parts 1 & 2
CSA C22.1-1990 or LATEST EDITION. The ground connection may be to a proven earth ground at the location service panel.
For added personal safety, when possible, it is suggested that a separate ground wire (size per local codes) 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 a wire (size per local codes) 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.
Warning
!
Electrical Grounding Instructions – This dryer is equipped with a 3-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded 3-prong receptacle. Do not cut or remove the grounding prong from this plug.
Electrical Connections
A wiring diagram is located behind the control panel for connection data.
If local codes permit, power to the dryer can be made by the use of a flexible UL listed power cord/pigtail (wire size must conform to rating of dryer), or the dryer can be hard wired directly to the service breaker panel. In both cases, a strain relief must be installed where the wiring enters the dryer.
For CE Models Only
The means for disconnection from the supply must be incorporated into wiring having a minimum contact separation of 3.0 mm in all poles.
Single-Phase (1ø)
Wiring Connections/Hookup
The electrical input connections are made into the rear service box located at the upper right area of the dryer. The ground connection is made to the copper lug, also provided in this box. To gain access, the service box cover must be removed.
16 Maytag Co.
113430 - 9
Gas Models Only
120-240V Application with Neutral
200-240V Application without Neutral
Important
!
For ease of service, the individual gas supply line of each dryer must have its own manual shutoff valve.
The dryer and its individual shutoff 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) for non-CE dryers or 50 mb for CE dryers.
Failure to isolate or disconnect the dryer from supply as noted can cause irreparable damage to the gas valve, voiding the warranty.
Note
!
The dryer must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure test of the gas supply system at test pressures equal to or less than 1/2 psig (3.5
kPa) for non-CE dryers or 50 mb for CE dryers.
!
Warning
Fire or explosion could result due to failure of isolating or disconnecting the gas supply as noted.
Note
!
Undersized gas piping will result in ignition problems, slow drying, increased use of energy, and can create a safety hazard.
!
Caution
The dryer must be grounded. A ground lug has been provided for this purpose.
Input connection wiring must be sized properly to handle the dryer’s current draw. This information is printed on the dryer’s data label.
!
Important
A strain relief must be used where the input wiring enters the oven assembly.
Gas Information _______________________
It is your responsibility to have all plumbing connections, materials, and workmanship conform to local and state regulations or codes of the country of destination. In the absence of such codes, all plumbing connections, materials, and workmanship must conform to the applicable local requirements. In the USA this is the National Fuel Gas Code
ANSI Z223.1-LATEST EDITION, or in Canada, the Canadian
Installation Codes CAN/CGA-B149.1-M91 (Natural Gas) or
CAN/CGAB149.2-M91 (L.P. Gas) or LATEST EDITION.
In Australia, the fuel gas code is AS 5601/AG 601, local authority, gas, electricity, and any other relevant statutory regulations.
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 being supplied.
Important
!
Failure to comply with these codes or ordinances, and/or the requirements stipulated in this manual, can result in personal injury and improper operation of the dryer.
113430 - 9 Telephone: (641) 787-7000
The dryer must be connected to the type of heat/gas indicated on the data label and pressure must be confirmed. If this information does not agree with the type of gas available, do not operate the dryer. Contact the distributor who sold the dryer or contact the manufacturer.
The input ratings shown on the data label are for elevations up to 2,000 feet (610 meters), unless elevation requirements of over 2,000 feet (610 meters) 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
(610 meters) is made by changing each burner orifice. If this conversion is necessary, contact the distributor who sold the dryer or contact the manufacturer.
Important
!
If connection to this appliance is made with a flexible hose, it must be suitable for the appliance category in accordance with national installation regulations of the country of destination, and if in doubt the installer must contact the supplier. The manufacturer of this appliance does not recommend the use of flexible gas supply line/hose. An external gas supply shutoff must be provided.
CE Dryers
There is an N.P.T. to B.S.P.T. adaptor included with each dryer, which must be installed to the gas inlet. The adaptor is shipped in the tumbler.
!
Important
Pipe joint compounds that resist the action of natural, propane, and butane gases must be used.
17
Heat Input/Gas Consumption/Orifice (Injector) Data (For Non-CE [European] Models Only)
Model
MDG31
MDG51
MDG77
Gas
Type
Gas Specifications for Non-CE Approved Dryers
**
Nominal
Heating Value
Supply
Pressure
Gross
Heat Input
Orifice Size
Natural
* Liquid Propane
Natural
* Liquid Propane
Natural
* Liquid Propane
B tu /ft 3
1,000
2,500
1,000
2,500
1,000
2,500
in WC
7.0-13.0
11.0
7.0-13.0
11.0
7.0-13.0
11.0
Btu/hr
55,000
55,000
90,000
90,000
110,000
110,000
kW
16.12
16.12
26.38
26.38
32.24
32.24
DMS
20
44
29
47
22
44
mm
4.089
2.184
3.454
2.994
3.988
2.184
Orifice
(Injector)
Quantity
2
2
1
1
2
2
Burner
Pressure in WC
3.0
10.0
3.0
10.0
3.0
10.0
Shaded areas are stated in metric equivalents
* Gas valve’s internal regulator disabled.
** Consult factory for elevations over 2,000 feet (610 meters) for correct orifice size.
Heat Input/Gas Consumption/Orifice (Injector) Data (For CE [European] Models Only)
Model
Gas
Type
Natural (I
2H
Natural (I
2L
* Propane (I
3+
)
Butane (I
3B/P
)
Propane (I
3P
)
Natural (I
2H
/I
Natural (I
2L
)
)
/I
2E+
2E+
2E
Natural (I
2E L L
*
*
Natural (I
2E L L
*
*
*
Natural (I
Butane (I
Natural (I
Butane (I
Butane (I
Propane (I
Natural (I
Natural (I
Natural (I
2E+
3+
3+
* Propane (I
Natural (I
2H
2L
)
/I
)
)
)
2E
)
3+
3B/P
3P
)
)
2E L L
)
)
)
)
)
)
2E
)
)
Nominal
Heating Value
B tu/ft
3
1,000
830
830
1,000
830
3,175
2,500
3,175
2,500
1,000
830
830
1,000
830
3,175
2,500
* Butane (I
3+
)
* Propane (I
3+
)
Butane (I
3B/P
)
Propane (I
3P
)
Shaded areas are stated in metric equivalents
3,175
2,500
1,000
830
830
1,000
830
3,175
2,500
3,175
2,500
Gas Specifications for CE Approved Dryers
**
Supply
Pressure mb
15-30
20-35
15-30
20-35
15-30
20
25
28-30
37
28-30/50
Gross
Heat Input
Btu/hr
55,000
55,000
55,000
kW
16.12
16.12
16.12
15-30
20
25
28-30
37
28-30/50
28-30/50
55,000
55,000
55,000
16.12
16.12
16.12
16.12
55,000
55,000
55,000
16.12
16.12
90,000
90,000
90,000
90,000
90,000
90,000
90,000
90,000
90,000
26.38
26.38
26.38
26.38
26.38
26.38
26.38
26.38
26.38
110,000
32.24
110,000
32.24
28-30/50
15-30
20-35
15-30
20
25
28-30
110,000
110,000
110,000
110,000
32.24
32.24
32.24
32.24
37
110,000
32.24
28-30/50
110,000
32.24
28-30/50
110,000
32.24
Fuel
Consumption
Orifice Size
1.901 kg/H
1.901 kg/H
1.901 kg/H
3.115 M 3 /H
3.753 M
3
/H
3.753 M
3
/H
3.115 M
3
/H
3.753 M
3
/H
2.324 kg/H
2.324 kg/H
2.324 kg/H
2.324 kg/H
1.557 M
3
/H
1.876 M 3 /H
1.876 M
3
/H
1.557 M
3
/H
1.876 M
3
/H
1.162 kg/H
1.162 kg/H
1.162 kg/H
1.162 kg/H
2.549 M
3
/H
3.071 M 3 /H
3.071 M
3
/H
2.549 M 3 /H
3.071 M
3
/H
1.901 kg/H
35
35
50
50
29
29
29
DMS
22
22
22
31
31
48
48
44
44
22
31
31
48
48
47
47
22
22
44
44
3.988
3.048
3.048
1.930
1.930
2.184
2.184
2.794
1.778
1.778
1.994
1.994
3.988
3.988
1.930
1.930
2.184
2.184
3.454
3.454
3.454
2.794
mm
3.988
3.988
3.988
3.048
3.048
* Gas valve’s internal regulator disabled.
** Consult factory for elevations over 2,000 feet (610 meters) for correct orifice size.
Orifice
(Injector)
Quantity
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
2
24.9
6.9
9.5
9.5
—
—
—
—
—
—
18.1
7.2
8.9
8.9
—
—
18.1
24.9
Burner
Pressure mb
6.9
9.5
9.5
—
—
—
—
18.1
24.9
18 Maytag Co.
113430 - 9
Piping/Connections
MDG31 MDG51 MDG77
1/2” 1/2”
CE dryer connections will be B.S.P.T., all others will be N.P.T.
There should be a minimum 6-inch (15.24 cm) clearance between the back guard and the first bend in the gas piping for ease of servicing. It is recommended that a gas shutoff valve be provided to the gas supply line of each dryer for ease in servicing.
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. 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.
TYPICAL NATURAL GAS INSTALLATION
TYPICAL L.P. GAS INSTALLATION
Consistent gas pressure is essential at all gas connections.
It is recommended that a 3/4-inch (19.05 mm) pipe gas loop be installed in the supply line servicing a bank of dryers. An in-line pressure regulator must be installed in the gas supply line (header) if the (natural) gas pressure exceeds 13.0 in wc
(32.34 mb) pressure.
A plugged tap, accessible for a pressure gauge connection, must be installed in the main gas supply line immediately upstream of the dryers.
113430 - 9
Important
!
Pipe joint compounds that resist the action of natural, L.P., and butane gases must be used.
Test all connections for leaks by brushing on a soapy water solution (liquid detergent works well).
!
Warning
Never test for leaks with a flame!!!
Converting from One Family of Gas to Another ______________________
Warning (CE Dryers)
!
This appliance must only be operated with the gas type indicated on the dryer’s data plate. If the appliance is converted (gas type changed), a data plate amendment must be obtained from Maytag (dryer’s serial number is required to purchase a conversion kit).
Important
!
Any burner changes or conversions must be made by a qualified professional.
The dryers manufactured for Belgium, Luxemburg, Greece,
Estonia, Slovak Republic, Iceland, Malta, Poland and Cyprus cannot be converted from one family of gas to another.
Conversion from Natural Gas to Propane or Butane Gas
The following conversion allows the dryer to be operated with either propane, butane, or LPG. The use of gas valve kit (P/N
140414) disables the internal regulator of the gas valve.
Therefore, the gas supply is ungoverned and an external regulator must be provided at the source of the supply
(example L.P. tank) or the gas supply line to the dryer. The type of L.P. kit supplied will depend on the country the dryer is installed in.
Parts Required for Conversion:
Description
Unregulated Gas Conversion Kit**
P/N
140414
OR
Regulated L.P. Gas Conversion Kit**** 140416
Burner Orifice (Injector)
L.P. Conversion Label
*
114515
* Refer to page 18 for orifice (injector) size.
** Required for unregulated propane or butane only.
*** MDG31 will require 1; MDG51 and MDG77 will require 2.
**** Required for regulated LPG or propane only.
Instructions
Disconnect electrical power to the dryer.
Close all shutoff valves in dryer’s gas supply line.
Important
!
The MDG51 and MDG77 will require that the following procedures be performed on both burner assemblies.
Open the panel located just below the loading door.
Telephone: (641) 787-7000
Qty
***
***
***
1
19
Locate the gas train and disconnect the union, 3 electrical plugs, and the gas train mounting screws from the burner.
Carefully slide the gas train out of the gas train enclosure.
(The carbon ignitor located at the far end of the gas train is very fragile.)
Remove 2 burner tube mounting screws and remove burner tube in order to gain access to the orifice.
Using a 3/8” wrench or socket, remove the existing orifice and replace it with an orifice from the kit.
Important
!
Use extreme care when removing and replacing orifice (injector). This orifice (injector) is made of brass, which is easily damaged.
Reinstall the burner tube onto the burner base.
Use a flat screwdriver to remove the regulator vent cap.
• For unregulated L.P. gas (most countries): install blocking pin (P/N 140414).
• For regulated L.P. gas (some countries): remove the white plastic regulator adjustment screw (under vent cap). Remove spring under screw and replace with spring from kit (P/N 140416). Replace regulator adjustment screw.
Install the gas train back into the dryer gas train enclosure.
Be sure the tab at the rear of the gas train engages into the mounting slot.
Connect the union and the 3 electrical plugs.
Affix L.P. Conversion Label (P/N 114515) to the dryer’s data label.
Complete L.P. Kit Conversion Confirmation Label (P/N
114083) and affix this label as close as possible to the dryer’s existing dryer rating (data) label/plate.
Non-CE Dryers
Affix L.P. Conversion Rating Label Addendum (P/N 114090) as close as possible to the dryer’s existing dryer rating (data) label/plate.
CE Dryers
Affix new data plate label that came with the conversion kit.
Open all shutoff valves, reconnect electrical power to the dryer, and test for leaks.
Important
!
Never test for leaks with an open flame!!! Use a purpose.
soapy water solution or product intended for that
20
Unregulated Gas Valve
Regulate (govern) gas externally (refer to “Supply Pressure” in chart on page 18) to the correct gas pressure for the gas being used. Operate dryer through 1 complete cycle to ensure proper operation.
Regulated Gas Valve
Refer to “Gas Pressure Adjustment” on the following page to adjust the gas valve to the appropriate burner pressure listed on page 18. The supply pressure must also match what is listed on page 18 for the type of gas to be used.
!
Important
Conversions done improperly can result in a fire or explosion!
Conversion from Propane or Butane Gas to Natural Gas
The following conversion allows the dryer to be operated with natural gas.
Parts Required for Conversion:
Description
Vent Cap and Spring
Burner Orifice (Injector)
P/N
140415
*
* Refer to page 18 for orifice (injector) size.
** MDG31 will require 1; MDG51 and MDG77 will require 2.
Instructions
Disconnect electrical power to the dryer.
Close all shutoff valves in dryer’s gas supply line.
Important
!
The MDG51 and MDG77 will require that the following procedures be performed on both burner assemblies.
Qty
**
**
Open the panel located just below the loading door.
Locate the gas train and disconnect the union, 3 electrical plugs, and the gas train mounting screws from the burner.
Carefully slide the gas train out of the gas train enclosure.
(The carbon ignitor located at the far end of the gas train is very fragile.)
Remove 2 burner tube mounting screws and remove burner tube in order to gain access to the orifice.
Using a 3/8” wrench or socket, remove the existing orifice and replace it with an orifice from the kit.
Important
!
Use extreme care when removing and replacing orifice (injector). This orifice (injector) is made of brass, which is easily damaged.
Reinstall the burner tube onto the burner base.
Select from the following 3 options, the conversion to be performed:
• Converting from unregulated L.P. to regulated natural
gas: use a flat screwdriver to remove the cap with blocking pin and install the regulator vent cap from the kit
(P/N 140415).
Maytag Co.
113430 - 9
• Converting from unregulated L.P. to unregulated
natural gas: no change to the regulator is required.
• Converting from regulated L.P. to regulated natural gas: remove the white plastic regulator adjustment screw
(under vent cap). Remove spring under screw and replace with spring from kit (P/N 140415). Replace regulator adjustment screw.
Install the gas train back into the dryer gas train enclosure.
Be sure the tab at the rear of the gas train engages into the mounting slot.
Connect the union and the 3 electrical plugs.
Open all shutoff valves, reconnect electrical power to the dryer, and test for leaks.
Operate the dryer through 1 complete cycle to ensure proper operation.
With dryer operating, check the manifold (burner) pressure at the tap on the gas valve to ensure proper operating pressure
(refer to chart on page 18).
Gas Pressure Adjustment
Disconnect electrical power to the dryer.
Important
!
The MDG51 and MDG77 will require that the following procedures be performed on both burner assemblies.
To adjust gas valve’s internal regulator, remove the regulator vent cap with the regulator adjustment tool, which is located on the back guard between the gas inlet and exhaust outlet
(refer to the illustration below for proper use of adjustment tool). Be sure to use one of the wide ends of the adjustment tool for removal of the vent cap. Once vent cap is removed, the narrow end of the adjustment tool can be used to turn the plastic adjustment screw in the valve. Turn the screw clockwise to raise pressure and counterclockwise to lower pressure.
Gas (burner) pressures are measured with the burner in operation for all burner adjustment conditions. Therefore once the necessary adjustments have been made, the dryer must be operated in a heating cycle to verify that the pressure is correct. If it is not correct, you must discontinue the power to the unit and make further adjustments. Repeat these steps as many times as necessary to achieve the correct burner pressure. Once the adjustment of the valve is complete, the vent cap must be replaced and sealed with, for example, paint to prevent maladjustment by the user.
Edge #1 for vent cap
Edge #2 for adjustment screw
Warning (CE Dryers)
!
This appliance must only be operated with the gas type indicated on the dryer’s data plate. If the appliance is converted (gas type changed), a data plate amendment must be obtained from Maytag.
Conversions done improperly can result in a fire or explosion!
Gas Pressure Testing _________________
For proper operation, the gas pressure must be correct, consistent and maintained at the gas pressure rates shown on page 18. Provisions are made at the gas valve for taking gas pressure readings.
There are 2 types of devices used to measure gas pressure.
They are the spring/mechanical type gauge and the manometer. The use of the spring/mechanical type gauge is not recommended because they are very easily damaged and are not always accurate. The preferred type of gauge is the manometer because it is a simple device to use and is highly accurate. A manometer is simply a glass or transparent plastic tube with a scale graduated in inches or mb. When it is filled with water and pressure is applied, the water in the tube rises, showing the exact gas pressure.
Gas Pressure Test Procedure
Turn gas cock in gas supply line to “OFF” position.
50 Hz dryers: Back out miniature screw inside pressure tap and attach manometer (refer to the illustration on page 20).
60 Hz dryers: Install pressure tap and attach manometer (refer to the illustration on page 20).
Turn gas cock to “ON” position.
Start the dryer in Heat Mode and wait for ignition. Gas manifold pressure should be as shown on page 18.
If the gas pressure needs to be adjusted, refer to “Gas
Pressure Adjustment” on this page.
Once test is complete, turn gas cock to “OFF” position.
Remove manometer. Tighten screw inside the pressure tap or install plug.
Turn gas cock to “ON” position and check for leaks with soap solution with main burner “ON.”
Water Information _____________________
Before You Start
Check Local Codes and Permits
Call your local water company or the proper municipal authority for information regarding local codes.
Important
!
It is your responsibility to have all plumbing connections made by a qualified professional to ensure that the plumbing installation is adequate and conforms to local, state, and federal regulations or codes.
It is the installer’s or owner’s responsibility to see that the required water pressure, pipe size, or connections are provided. The manufacturer assumes no responsibility if the fire suppression system is not connected, installed, or maintained properly.
113430 - 9 Telephone: (641) 787-7000 21
Installation
Water Supply
The fire suppression system must be supplied with a minimum water pipe size of 1/2-inch (12.7 mm) and be provided with 40 psi +/- 20 psi (2.75 bar +/- 1.37 bar) of pressure.
If the rear area of the dryer or the water supply is located in an area where it will be exposed to cold/freezing temperatures, provisions must be made to protect these water lines from freezing.
Warning
!
If the water in the supply line or water solenoid valve freezes, the fire suppression system will be inoperative!!
Water Connections
The water connection is made to the 3/4”-11.5 NH hose adaptor, which is shipped in the tumbler and must be installed to the 1/2” N.P.T. water connection, located at the upper rear of the dryer. A flexible supply line/coupling must be used in an effort to avoid damaging the electric water solenoid valve.
Note
!
The 3/4”-11.5 NH is a standard hose coupling screw thread. It is not to be confused with 3/4”
N.P.T. The sealing of an NH connection is made with a washer opposed to the mating threads of an N.P.T.
assembly. The 2 thread designs are not compatible.
It is recommended that a filter or strainer be installed in the water supply line.
Important
!
Flexible supply line/coupling must be used.
Solenoid valve failure due to hard plumbing connections will void warranty.
The dryer is to be connected to the water mains using a new hose set and the old hose set should not be reused.
Optional Manual Bypass
Provisions are made in the dryer’s fire suppression system for the installation of an optional manual bypass. The connections for the manual bypass are made at the “tee” or
“three way” fitting located in the outlet supply side of the water solenoid valve. The manual ball cock shutoff valve must be located outside of the dryer at a distance from the dryer where it is easily accessible. The use and connection of this manual bypass is at the option or discretion of the owner.
The water connection for the manual bypass is made to the
“tee” or “three way” fitting, which has a 3/8” F.N.P.T. and a coupling must be used to provide the minimum 1/2-inch (12.7
mm) supply (feed) line.
Electrical Requirements
No independent external power source or supply connection is necessary. The 24-volt power to operate the fire suppression system is accomplished internally in the dryer
(from the dryer controls).
Warning
!
Electrical power must be provided to the dryer at all times. If the main electrical power supply to the dryer is disconnected, the fire suppression system is inoperative!!
Preparation for Operation/Start-Up ___
The following items should be checked before attempting to operate the dryer:
• Read all “CAUTION,” “WARNING,” and “DIRECTION” labels attached to the dryer.
• Check incoming supply voltage to be sure that it is the same as indicated on the data label. In the case of
208 VAC or 240 VAC, the supply voltage must match the electric service exactly.
• GAS MODELS – Check to ensure that the dryer is connected to the type of heat/gas indicated on the dryer data label.
• GAS MODELS – Be sure that all gas shutoff valves are in the open position.
• Be sure all back panels (guards) and electric box covers are in place.
• Be sure the service doors are closed and securely in place.
• Be sure the lint door/drawer is securely in place.
• Rotate the tumbler (drum) by hand to be sure it moves freely.
• Check bolts, nuts, screws, terminals, and fittings for tightness and security.
• Check that the vent is connected to the dryer and is exhausted to the outdoors.
Preoperational Test ___________________
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.
Turn on electric power to the dryer.
Refer to the Operating Instructions for starting your particular model dryer.
Gas Dryers
Open all shutoff valves.
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 shutoff valves are open.
A gas pressure test should be taken at the gas valve pressure tap of each dryer to ensure that the water column pressure is correct and consistent.
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Note
!
verified.
Water column pressure requirements (measured at the pressure tap of the gas valve body) must be
Important
!
In most cases 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.
Safety Related Circuits
Make a complete operational check of all safety related circuits:
• Door Switch(es)
• Hi-Limit Thermostats
• Sail Switch
Make a complete operational check of all operating controls.
Tumbler Coating
The tumbler is treated with a protective coating. We suggest dampening old garments or cloth material with a solution of water and nonflammable mild detergent and tumbling them in the tumbler to remove this coating.
Microprocessor Programs/Selections
Each microprocessor controller (computer) has been preprogrammed by the factory with the most commonly used parameter (program) selections. If computer program changes are required, refer to the computer programming manual, which was shipped with the dryer.
Preoperational Instructions __________
Important
!
For more detailed information regarding the microprocessor controller (computer), refer to the microprocessor user’s manual included with the dryer.
Coin Models
Microprocessor Controller (Computer)
When the microprocessor controller (computer) is in the ready state, the L.C.D. screen will display “Ready, Insert $XX.XX
(amount) to Start”.
Insert coin(s). Once the correct “Amount to Start” has been inserted, the L.C.D. will display “Select Temperature”.
Select temperature by pressing “HI,” “MED,” or “LO.” The cycle will start and the L.C.D. will display the Dry Cycle selected and the remaining time.
The dryer will continue through the drying and cooling cycles, until the vended time has expired.
Note
!
To stop the dryer, open main door. Continuation of the cycle will resume only after the door has been closed and any one of the 3 temperature selections is pressed.
Non-Coin Models
Microprocessor Controller (Computer)
The L.E.D. display reads “READY” (no cycle in progress).
Press the letter on the keypad corresponding to the cycle desired (e.g. key “D”).
The dryer will then start (i.e. blower, tumbler, and heat).
The L.E.D. display will read MANUAL DRYING CYCLE D,
___MIN REMAIN.
Note
!
The dryer can be stopped at any time by pressing the “STOP/CLEAR” key, at this time the dryer will go into a cycle pause. If the “STOP/CLEAR” key is pressed again at this point, the cycle that was in progress will be cancelled and returned to the “READY” state.
When the programmed drying time has expired, the non-coin microprocessor controller (computer) will proceed into the
Cool Down Cycle.
Once the Cool Down Cycle begins at the end of the heat cycle, the L.E.D. display will read COOL DOWN TEMP __/__
MINUTES remaining. At the end of the heat cycle, the dryer will shut off the heat and continue the fan and tumbler until the Cool Down Time or temperature is reached.
Shutdown Instructions ________________
If the dryer is to be shutdown (taken out of service) for a period of time, the following must be performed:
Discontinue power to the dryer either at the external disconnect switch or the circuit breaker.
Discontinue the heat supply:
Gas Models – Discontinue the gas supply.
Shut off external gas supply shutoff valve.
Shut off internal gas supply shutoff valve located in the gas valve burner area.
Service/Parts Information ____________
Service
Service must be performed by a qualified trained technician, service agency, or gas supplier. If service is required, contact the Maytag distributor from whom the equipment was purchased. If the distributor cannot be contacted or is unknown, contact the Maytag Co. for a distributor in your area.
Note
!
When contacting the Maytag Co., be sure to give them the correct model number and serial number so that your inquiry is handled in an expeditious manner.
Parts
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.
113430 - 9 Telephone: (641) 787-7000 23
Note
!
When ordering replacement parts from the Maytag distributor or the Maytag Co. be sure to give them the correct model number and serial number so that your parts order can be processed in an expeditious manner.
Warranty Information _________________
Returning Warranty Cards
Before any dryer leaves the manufacturer’s test area, a warranty card is placed on the back side of the main door glass. These warranty cards are intended to serve the customer where we record the individual installation date and warranty information to better serve you should you file a warranty claim.
!
!
Important
A separate warranty card must be completed and returned for each individual dryer.
Note
Be sure to include the installation date when returning the warranty card(s).
Warranty
For a copy of the manufacturer’s commercial warranty covering your particular dryer(s), contact the Maytag distributor from whom you purchased the equipment and request a dryer warranty form. If the distributor cannot be contacted or is unknown, warranty information can be obtained from the
Maytag Co.
Note
!
Whenever contacting the Maytag Co. for warranty information, be sure to have the dryer’s model number and serial number available so that your inquiry can be handled in an expeditious manner.
Routine Maintenance _________________
Cleaning
A program and/or schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the dryer, as well as throughout the ductwork system.
The frequency of cleaning can best be determined from experience at each location. Maximum operating efficiency is dependent upon proper airflow. The accumulation of lint can restrict this airflow. If the guidelines in this section are met, the dryer will provide many years of efficient, trouble free, and most importantly, safe operation.
Warning
!
hazard. Keep dryer area clear and free from combustible materials, gasoline, and other flammable vapors and liquids.
Lint from most fabrics is highly combustible. The accumulation of lint can create a potential fire
Note
!
Suggested time intervals shown are for average usage which is considered 6 to 8 operational
(running) hours per day.
Important
!
Dryer produces combustible lint and must be exhausted to the outdoors. Every 6 months, inspect the exhaust ducting and remove any lint buildup.
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 door/ drawer is located just below the loading door of the dryer.
Open the lint door/drawer, brush the lint off the lint screen, and remove the lint. Inspect lint screen and replace if torn.
Note
!
To remove the lint drawer from the dryer, pull drawer out approximately halfway. Press the lint door/drawer stop downward and pull the drawer out.
!
Important
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 area.
!
Warning
To avoid the hazard of electrical shock, discontinue electrical supply to the dryer.
90 Days
Remove lint from gas valve burner area with a dusting brush or vacuum cleaner attachment.
Clean any lint accumulation in and around the motor(s) casing opening.
!
Note
To prevent damage, avoid cleaning and/or touching ignitor/flame-probe assembly.
Every 6 Months
Inspect and remove lint accumulation in customer furnished exhaust ductwork system and from dryer’s internal exhaust ducting.
!
Note
The accumulation of lint in the exhaust ductwork can create a potential fire hazard.
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113430 - 9
Note
!
Do not obstruct the flow of combustion and ventilation air. Check back draft dampers in the exhaust ductwork. Inspect and remove any lint accumulation, which can cause the damper to bind or stick.
A back draft damper that is sticking partially closed can result in slow drying and shutdown of heat circuit safety switches or thermostats.
When cleaning the dryer cabinet(s), avoid using harsh abrasives. A product intended for the cleaning of appliances is recommended.
7 Days After Installation and Every 12 Months Thereafter
A competent professional should inspect bolts, nuts, screws, setscrews, grounding connections and nonpermanent gas connections (unions, shutoff valves, and orifices). Belts should be examined. Cracked or seriously frayed belts should be replaced. Complete an operational check of controls and valves. Complete an operational check of all safety devices (lint door/drawer switch, door switches, sail switch, and hi-limit thermostats).
Data Label Information _____________________________________________________________
Standard Label CE Label
When contacting Maytag, the information on the data label is required to ensure proper service/parts assistance. The data label is located at the upper left rear of the dryer behind the back guard.
1.
Model Number – This describes the style of dryer and type of heat (gas, electric, or steam).
2.
Serial Number – Allows the manufacturer to gather information on your particular dryer.
3.
Type of Heat – This describes the type of heat for your particular dryer, gas (either natural gas or L.P. gas), electric, or steam.
4.
Heat Input (For Gas Dryers) – This describes the heat input in British thermal units per hour (Btu/hr) or kilowatts (kW).
5.
Orifice Size (For Gas Dryers) – Gives the number drill size used.
6.
Electric Service – This describes the voltage and current rating for a particular model.
7.
Gas Manifold Pressure (For Gas Dryers) – This describes the manifold pressure taken at the gas valve tap.
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Part No. 113430 9 - 02/15/08 - 0
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