Maytag Clothes Dryer MDG31 User Manual

MDG31 / MDG51 / MDG77

Installation/Operator Manual

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.

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.

—Ne pas entreposer ni utiliser d’essence

ni d’autres vapeurs ou liquides

inflammables à proximité de cet

appareil ou de tout autre appareil.

— WHAT TO 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

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.

supplier, call the fire department.

— 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.

RETAIN THESE

INSTRUCTIONS IN A

SAFE PLACE FOR

FUTURE REFERENCE

Part No. 113430-10

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State of California Proposition 65 Warnings:

Table of Contents ________

WARNING: This product contains a chemical known

to the State of California to cause cancer.

Safety Precaution s ................................4

MDG31 Specification s ...........................6

MDG51 Specification s ...........................8

MDG77 Specification s .........................1 0

WARNING: This product contains a chemical known

to the State of California to cause birth defects or other

reproductive harm.

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.

Installation Procedures ......................1 2

Location Requirements ......................................... 12

Unpacking/Setting Up ........................................... 12

Dryer Enclosure Requirements ............................. 12

Fres h A ir Supply Requirements ............................ 13

Exhaust Requirements ......................................... 13

Electrical Information ............................................ 15

Gas Information .................................................... 17

Converting from One Family of Gas t o A nother ..... 19

Gas Pressure T e sting ........................................... 21

Water Information ................................................. 21

Preparation for Operation/Start-Up ........................ 22

Preoperational T e st ............................................... 22

Preoperational Instructions ................................... 23

Shutdown Instructions .......................................... 23

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.»

Service/Parts Information ..................2 3

Service .................................................................. 23

Part s ..................................................................... 23

Warranty Information .........................2 4

Returning Warranty Card s ..................................... 24

Warranty ............................................................... 24

WARNING

Children should not be allowed to play on or near

the dryer(s). Children should be supervised if near

dryer(s) in operation.

Routine Maintenance ..........................2 4

Under no circumstances should the dryer door

switch(es), lint door/drawer switch(es), or heat safety

circuit(s) ever be disabled.

Cleanin g ................................................................ 24

Data Label Informatio n .......................2 5

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.

List of Acronyms _____________________________

FOR YOUR SAFETY

Do not dry mop heads in the dryer. Do not use

dryer in the presence of dry cleaning fumes.

HVAC Heating, Ventilating, and Air-Conditioning

in wc

Inches of Water Column

L.C.D. Liquid Crystal Display

L.E.D. Light Emitting Diode

The dryers must not be installed or stored in an area

where it will be exposed to water and/or weather.

L.P.

OSHA Occupational Safety and Health Administration

UL Underwriters Laboratory

Liquid Propane

The wiring diagram for the dryer is located behind

the control panel.

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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.

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.

Warning

The collection of lint in the burner area and

exhaust ductwork can create a potential fire

hazard.

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.

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.

Do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance.

Note

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.

Failure to electrically ground the dryer properly will

void the warranty.

Warning

What To Do If You Smell Gas:

• Do not try to light any appliance.

Personal injury or fire could result should the dryer

door switch, lint door/drawer, or heat safety circuit

ever be disabled.

• Do not touch any electrical switch.

• Do not use any phone in your building.

• Clear the room, building, or area of all occupants.

Remove articles from the dryer as soon as the drying cycle

has been completed.

• Immediately call your gas supplier from a neighbor’s

phone. Follow the gas supplier’s instructions.

Warning

Articles left in the dryer after the drying and cooling

cycles have been completed can create a fire

hazard.

• 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.

For safety, proper operation, and optimum performance, the

dryer must not be operated with a load less than 66% of its

rated capacity.

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

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.

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.

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).

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.

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).

Do not dry mop heads. Contamination by wax or

flammable solvents will create a fire hazard.

Use this dryer only for its intended purpose, drying fabrics.

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.

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.

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113430-10

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Warning

To reduce the risk of personal injury, install

lockable doors to prevent public access to the rear

of the dryers.

NOTES ____________________________________

___________________________________________

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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MDG31 Specifications ________________________________________________________________

13.61 kg

76.20 cm

68.58 cm

312.62 L

0.18 kW

0.37 kW

49.23 cm

37.78 cm

MAXIMUM CAPACITY (DRY WEIGHT)

TUMBLER DIAMETER

30 lb

30”

TUMBLER DEPTH

27”

TUMBLER VOLUME

11.04 cu ft

1/4 hp

1/2 hp

19-3/8”

14-7/8”

TUMBLER/DRIVE MOTOR

BLOWER/FAN MOTOR

DOOR OPENING (DIAMETER)

DOOR SILL HEIGHT

WATER CONNECTION

N / A

DRYERS PER 20’/40’ CONTAINER

DRYERS PER 48’/53’ TRUCK

VOLTAGE AVAILABLE

12 / 28

34 / 38

120V

285 lb

1ø 2w 60 Hz

129.27 kg

APPROXIMATE NET WEIGHT

APPROXIMATE SHIPPING WEIGHT

AIRFLOW

140.61 kg

10.19 cmm

13,860 kcal/hr

15.24 cm

310 lb

360 cfm

55,000 Btu/hr

6”

HEAT INPUT

EXHAUST CONNECTION (DIAMETER)

COMPRESSED AIR CONNECTION

COMPRESSED AIR VOLUME

INLET PIPE CONNECTION

VOLTAGE AVAILABLE

N / A

1/2” M.N.P.T.

APPROXIMATE NET WEIGHT

APPROXIMATE SHIPPING WEIGHT

AIRFLOW

EXHAUST CONNECTION (DIAMETER)

COMPRESSED AIR CONNECTION

COMPRESSED AIR VOLUME

OVEN SIZE

N / A

kcal/hr

Btu/hr

VOLTAGE AVAILABLE

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

N / A

RETURN CONNECTION

Shaded areas are stated in metric equivalents

5/13/05

Note

The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

Maytag Co.

113430-10

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MDG31 Specifications ________________________________________________________________

113430-10

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MDG51 Specifications _________________________________________________________________

22.68 kg

93.98 cm

65.41 cm

453.64 L

0.75 kW

0.37 kW

69.55 cm

40.64 cm

MAXIMUM CAPACITY (DRY WEIGHT)

TUMBLER DIAMETER

TUMBLER DEPTH

50 lb

37”

25-3/4”

16.02 cu ft

1 hp

TUMBLER VOLUME

TUMBLER/DRIVE MOTOR

BLOWER/FAN MOTOR

DOOR OPENING (DIAMETER)

DOOR SILL HEIGHT

1/2 hp

27-3/8”

16”

WATER CONNECTION

3/4”-11.5 NH (North America)

3/4” B.S.P.T. (Outside North America)

10 / 22

DRYERS PER 20’/40’ CONTAINER

DRYERS PER 48’/53’ TRUCK

VOLTAGE AVAILABLE

28 / 30

120V 1ø 2w 60 Hz

247.21 kg

256.28 kg

APPROXIMATE NET WEIGHT

APPROXIMATE SHIPPING WEIGHT

AIRFLOW

545 lb

565 lb

14.87 cmm

22,680 kcal/hr

20.32 cm

525 cfm

90,000 Btu/hr

8”

HEAT INPUT

EXHAUST CONNECTION (DIAMETER)

COMPRESSED AIR CONNECTION

COMPRESSED AIR VOLUME

INLET PIPE CONNECTION

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

N / A

kcal/hr

Btu/hr

VOLTAGE AVAILABLE

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

N / A

RETURN CONNECTION

Shaded areas are stated in metric equivalents

11/23/05

Note

The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

Maytag Co.

113430-10

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MDG51 Specifications _________________________________________________________________

113430-10

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MDG77 Specifications ______________________________________________________________

34.02 kg

93.98 cm

90.17 cm

625.52 L

0.75 kW

0.37 kW

69.53 cm

40.64 cm

MAXIMUM CAPACITY (DRY WEIGHT)

TUMBLER DIAMETER

TUMBLER DEPTH

75 lb

37”

35-1/2”

22.09 cu ft

1 hp

TUMBLER VOLUME

TUMBLER/DRIVE MOTOR

BLOWER/FAN MOTOR

DOOR OPENING (DIAMETER)

DOOR SILL HEIGHT

1/2 hp

2 7-3/8 ”

16”

WATER CONNECTION

3/4”-11.5 NH (North America)

3/4” B.S.P.T. (Outside North America)

DRYERS PER 20’/40’ CONTAINER

DRYERS PER 48’/53’ TRUCK

VOLTAGE AVAILABLE

9 / 20

25 / 27

120V

600 lb

1ø 2w 60 Hz

272.16 kg

APPROXIMATE NET WEIGHT

APPROXIMATE SHIPPING WEIGHT

AIRFLOW

281.23 kg

15.86 cmm

27,720 kcal/hr

20.32 cm

620 lb

560 cfm

110,000 Btu/hr

8”

HEAT INPUT

EXHAUST CONNECTION (DIAMETER)

COMPRESSED AIR CONNECTION

COMPRESSED AIR VOLUME

INLET PIPE CONNECTION

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

N / A

kcal/hr

Btu/hr

VOLTAGE AVAILABLE

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

N / A

RETURN CONNECTION

Shaded areas are stated in metric equivalents

11/23/05

Note

The manufacturer reserves the right to make changes in specifications at any time without notice or obligation.

Maytag Co.

113430-10

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MDG77 Specifications ______________________________________________________________

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Installation Procedures _______________

Unpacking/Setting Up _________________

Remove protective shipping material (i.e., plastic wrap and

optional shipping box) from the dryer.

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

applicableAmerican 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).

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.

Location Requirements _______________

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.

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 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) or LATEST EDITION (for

General Installation and Gas Plumbing).

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.

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.

Dryer Enclosure Requirements _______

Commercial Type II (MDG31, MDG51, MDG77)

The dryer must not be installed or stored in an area where it

will be exposed to water and/or weather.

Bulkheads and partitions should be made of noncombustible

material.

Dryers installed in residential garages must be elevated

18-inches (45.72 cm) above the floor.

Note

Allowances must be made for opening the control

door.

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).

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).

Important

The dryer should be located where a minimum

A minimum overhead clearance of 6-inches (15.24 cm)

is required.

amount of exhaust ducting will be necessary.

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.

The dryer must be installed with adequate clearance for air

openings into the combustion chamber.

Caution

1/16” (1.5875 mm) minimum is required.

This dryer produces combustible lint and must be

exhausted to the outdoors. Every 6 months,

Flooring should be level or below dryer cabinet for ease

of removing panels during maintenance.

inspect the exhaust ducting and remove any lint buildup.

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.

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).

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Domestic Type I (MDG31, MDG51 Only)

A = 10-inches (25.4 cm)

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.

A = 6-inches (15.24 cm)

B = 24-inches (60.96 cm)

Important

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.

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 inch²(1154.836 cm²)

for MDG31; and 293 inch²(1890.319 cm²) for MDG51.

Louvered doors with equivalent air openings are acceptable.

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.

No other fuel-burning appliance shall be installed in the same

closet as the dryer.

Fresh Air Supply Requirements _______

The dryer shall not be exhausted into any gas vent, chimney,

wall, ceiling or concealed space of a building.

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.

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.

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

inch²(710 cm²) is required for each MDG77, 90 inch²(580

cm²) for each MDG51, 55 inch²(354 cm²) for each MDG31.

(Based on 1 inch²[6.5 cm²] per 1,000 Btu [252 kcal].)

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.

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.

Important

It is recommended that exhaust or booster fans

Note

Component failure due to dry cleaning solvent

fumes will void the warranty.

not be used in the exhaust ductwork system.

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Important

Vertical Venting

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).

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.

Note

When the exhaust ductwork passes through a wall,

ceiling, or roof made of combustible materials, the

opening must be 2-inches (5.08 cm) larger than the duct

(all the way around). The duct must be centered within this

opening.

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).

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)

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

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.

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.

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.

113430-10

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Important

No more than 4 dryers should be connected to 1

main common duct.

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.

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)

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 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

NOTE 2 Distance should be 2 times the diameter of the duct to the nearest

obstruction.

The use of aluminum wire will void the warranty.

An individual ground circuit must be provided to

each dryer, do not daisy chain.

Multiple Dryer Venting with 6-Inch (15.24 cm) Diameter

Component failure due to improper voltage application will

void the warranty.

360 cfm (10.19 cmm) Exhaust Connections at Common Duct

NUMBER OF DRYERS

The manufacturer reserves the right to make changes in

specifications at any time without notice or obligation.

SQ IN

MINIMUM CROSS-

SECTIONAL AREA

SQ CM

516.1

348.4

193.55

MINIMUM ROUND

DUCT DIAMETER

Important

25.4

20.32

15.24

A separate protected circuit must be provided to

each dryer.

Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter

525 cfm (14.87 cmm) Exhaust Connections at Common Duct

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.

NUMBER OF DRYERS

SQ IN

120

MINIMUM CROSS-

SECTIONAL AREA

SQ CM

774.2

516.1

348.4

MINIMUM ROUND

DUCT DIAMETER

30.48

25.4

20.32

Important

The wire size must be properly sized to handle the

related current.

Multiple Dryer Venting with 8-Inch (20.32 cm) Diameter

560 cfm (15.86 cmm) Exhaust Connections at Common Duct

Warning

NUMBER OF DRYERS

SQ IN

120

MINIMUM CROSS-

SECTIONAL AREA

208 VAC and 240 VAC are not the same. Any

SQ CM

774.2

516.1

348.4

damage done to dryer components due to

improper voltage connections will automatically void the

warranty.

MINIMUM ROUND

DUCT DIAMETER

30.48

25.4

20.32

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Warning (Gas Models Only)

Grounding

Dryers built for use with a voltage between 200

and 240 must verify the input voltage during

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 CodeANSI/NFPANO. 70-LATEST EDITION,

or in Canada, the installation must conform to applicable

Canada Standards: Canadian Electrical Codes Parts 1 & 2

CSAC22.1-1990 or LATEST EDITION. The ground connection

may be to a proven earth ground at the location service panel.

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.

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.

LINE VOLTAGE

TERM

50 Hz

60 Hz

260

226

283

249

HIGH

MED

LOW

239

208

260

230

217

189

236

208

Important

For personal safety and proper operation, the dryer

must be grounded.

Electrical Service Specifications

Gas Models Only

Provisions are made for ground connection in each dryer at

the electrical service connection area.

ELECTRICAL SERVICE SPECIFICATIONS

IMPORTANT: 208 VAC AND 230/240 VAC ARE NOT THE SAME. When ordering,

Warning

specify exact voltage.

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.

NOTES: A.

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.

B. 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.

C. Circuit breakers for 3-phase (3ø) dryers must be 3-pole type.

Electrical Connections

A wiring diagram is located behind the control panel for

connection data.

APPROX.

AMP DRAW

SERVICE

VOLTAGE

WIRE

SERVICE

CIRCUIT

BREAKER

PHASE

60 Hz

10.3

15.6

50 Hz

MDG31

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.

120

1ø

—

MDG51

—

MDG77

For CE Models Only

—

12/18/08

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.

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Important

Gas Models Only

For ease of service, the individual gas supply line

of each dryer must have its own manual shutoff

120-240V Application with Neutral

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

200-240V Application without Neutral

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 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 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.

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

A strain relief must be used where the input wiring

enters the oven assembly.

Gas Information _______________________

Important

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.

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.

In Australia, the fuel gas code is AS 5601/AG 601, local

authority, gas, electricity, and any other relevant statutory

regulations.

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.

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

Pipe joint compounds that resist the action of

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.

natural, propane, and butane gases must be used.

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Heat Input/Gas Consumption/Orifice (Injector) Data (For Non-CE [European] Models Only)

Gas Specifications for Non-CE Approved Dryers**

Nominal

Heating Value

Supply

Pressure

Gross

Heat Input

Burner

Pressure

Orifice

(Injector)

Quantity

Orifice Size

Gas

Type

Model

Btu/ft³

1,000

2,500

1,000

2,500

1,000

2,500

in WC

7.0-13.0

11.0

Btu/hr

55,000

90,000

110,000

DMS

in WC

3.0

16.12

26.38

32.24

4.089

2.184

3.454

2.994

3.988

2.184

Natural

MDG31

MDG51

MDG77

10.0

3.0

*Liquid Propane

Natural

7.0-13.0

11.0

10.0

3.0

*Liquid Propane

Natural

7.0-13.0

11.0

10.0

*Liquid Propane

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)

Gas Specifications for CE Approved Dryers**

Nominal

Heating Value

Supply

Pressure

Gross

Heat Input

Burner

Pressure

Orifice

(Injector)

Quantity

Orifice Size

Gas

Type

Fuel

Consumption

Model

Btu/ft³

1,000

830

Btu/hr

55,000

90,000

110,000

DMS

6.9

9.5

15-30

20-35

16.12

26.38

32.24

1.557 M³/H

1.876 M³/H

1.557 M³/H

1.876 M³/H

1.162 kg/H

2.549 M³/H

3.071 M³/H

2.549 M³/H

3.071 M³/H

1.901 kg/H

3.115 M³/H

3.753 M³/H

3.115 M³/H

3.753 M³/H

2.324 kg/H

3.988

3.048

1.930

2.184

3.454

2.794

1.778

1.994

3.988

3.048

1.930

2.184

Natural (I_2H/I_2E

)

Natural (I_2L

)

15-30

9.5

—

Natural (I_2ELL

)

830

1,000

830

*Natural (I_2E+

)

—

28-30

—

*Butane (I₃₊

*Propane (I₃₊

Butane (I_3B/P

Propane (I_3P

Natural (I_2H/I_2E

Natural (I_2L

Natural (I_2ELL

)

3,175

2,500

3,175

2,500

1,000

830

—

)

28-30/50

15-30

20-35

15-30

18.1

24.9

7.2

8.9

—

)

830

1,000

830

*Natural (I_2E+

)

—

28-30

—

*Butane (I₃₊

*Propane (I₃₊

Butane (I_3B/P

Propane (I_3P

Natural (I_2H/I_2E

Natural (I_2L

Natural (I_2ELL

)

3,175

2,500

3,175

2,500

1,000

830

—

)

28-30/50

15-30

20-35

15-30

18.1

24.9

6.9

9.5

—

)

830

1,000

830

*Natural (I_2E+

)

—

28-30

—

*Butane (I₃₊

*Propane (I₃₊

Butane (I_3B/P

Propane (I_3P

)

3,175

2,500

3,175

2,500

—

)

28-30/50

18.1

24.9

)

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.

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113430-10

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Important

Piping/Connections

Pipe joint compounds that resist the action of

natural, L.P., and butane gases must be used.

MDG31

MDG51

MDG77

Test all connections for leaks by brushing on a soapy water

solution (liquid detergent works well).

1//22”

”

1/2”

CE dryer connections will be B.S.P.T., all others will be N.P.T.

Warning

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.

Never test for leaks with a flame!!!

Converting from One Family

of Gas to Another ______________________

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.

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).

Note

Important

Any burner changes or conversions must be

Undersized gas supply piping can create a low or

inconsistent pressure, which will result in erratic

operation of the burner ignition system.

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.

TYPICAL NATURALGAS INSTALLATION

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

TYPICAL L.P. GAS INSTALLATION

P/N

Qty

Unregulated Gas Conversion Kit**

140414

***

Regulated L.P. Gas Conversion Kit****

Burner Orifice (Injector)

L.P. Conversion Label

140416

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.

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.

Important

The MDG51 and MDG77 will require that the

following procedures be performed on both

burner assemblies.

A plugged tap, accessible for a pressure gauge connection,

must be installed in the main gas supply line immediately

upstream of the dryers.

Open the panel located just below the loading door.

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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.)

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.

Remove 2 burner tube mounting screws and remove burner

tube in order to gain access to the orifice.

Regulated Gas Valve

Using a 3/8” wrench or socket, remove the existing orifice

and replace it with an orifice from the kit.

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

Use extreme care when removing and replacing

orifice (injector). This orifice (injector) is made of

brass, which is easily damaged.

Important

Conversions done improperly can result in a fire or

explosion!

Reinstall the burner tube onto the burner base.

Conversion from Propane or Butane Gas

to Natural Gas

Use a flat screwdriver to remove the regulator vent cap.

• For unregulated L.P. gas (most countries): install

The following conversion allows the dryer to be operated with

natural gas.

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.

Parts Required for Conversion:

Description

Vent Cap and Spring

Burner Orifice (Injector)

P/N

140415

Qty

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.

Refer to page 18 for orifice (injector) size.

** MDG31 will require 1; MDG51 and MDG77 will require 2.

Connect the union and the 3 electrical plugs.

Instructions

Disconnect electrical power to the dryer.

Affix L.P. Conversion Label (P/N 114515) to the dryer’s data

label.

Close all shutoff valves in dryer’s gas supply line.

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.

Important

The MDG51 and MDG77 will require that the

following procedures be performed on both

burner assemblies.

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.

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.)

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.

Remove 2 burner tube mounting screws and remove burner

tube in order to gain access to the orifice.

Important

Using a 3/8” wrench or socket, remove the existing orifice

and replace it with an orifice from the kit.

Never test for leaks with an open flame!!! Use a

soapy water solution or product intended for that

purpose.

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).

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Warning (CE Dryers)

This appliance must only be operated with the gas

type indicated on the dryer’s data plate. If the

• 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.

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!

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.

Gas Pressure Testing _________________

Connect the union and the 3 electrical plugs.

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.

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.

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.

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.

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).

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.

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.

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.

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.

Edge #1 for vent cap

Edge #2 for adjustment screw

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.

113430-10

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Warning

Installation

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!!

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.

Preparation for Operation/Start-Up ___

The following items should be checked before attempting to

operate the dryer:

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.

• Read all “CAUTION,” “WARNING,” and “DIRECTION”

labels attached to the dryer.

Warning

• 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.

If the water in the supply line or water solenoid

valve freezes, the fire suppression system will be

inoperative!!

• GAS MODELS – Check to ensure that the dryer is

connected to the type of heat/gas indicated on the dryer

data label.

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.

• 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.

Note

• Be sure the service doors are closed and securely in

place.

The 3/4”-11.5 NH is a standard hose coupling

• Be sure the lint door/drawer is securely in place.

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.

• Rotate the tumbler (drum) by hand to be sure it moves

freely.

• Check bolts, nuts, screws, terminals, and fittings for

tightness and security.

It is recommended that a filter or strainer be installed in the

water supply line.

• Check that the vent is connected to the dryer and is

exhausted to the outdoors.

Important

Flexible supply line/coupling must be used.

Solenoid valve failure due to hard plumbing

connections will void warranty.

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.

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

Turn on electric power to the dryer.

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.

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.

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.

Note

During the purging period, check to be sure that

all gas shutoff valves are open.

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).

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.

Maytag Co.

113430-10

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Note

Non-Coin Models

Microprocessor Controller (Computer)

Water column pressure requirements (measured

at the pressure tap of the gas valve body) must be

The L.E.D. display reads “READY” (no cycle in progress).

verified.

Press the letter on the keypad corresponding to the cycle

desired (e.g. key “D”).

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.

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

Safety Related Circuits

The dryer can be stopped at any time by pressing

Make a complete operational check of all safety related

circuits:

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.

• Door Switch(es)

• Hi-Limit Thermostats

• Sail Switch

When the programmed drying time has expired, the non-coin

microprocessor controller (computer) will proceed into the

Cool Down Cycle.

Make a complete operational check of all operating controls.

Tumbler Coating

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.

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

Shutdown Instructions ________________

If the dryer is to be shutdown (taken out of service) for a

period of time, the following must be performed:

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.

Discontinue power to the dryer either at the external disconnect

switch or the circuit breaker.

Discontinue the heat supply:

Preoperational Instructions __________

Gas Models – Discontinue the gas supply.

Shut off external gas supply shutoff valve.

Important

Shut off internal gas supply shutoff valve located in the gas

valve burner area.

For more detailed information regarding the

microprocessor controller (computer), refer to the

microprocessor user’s manual included with the dryer.

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.

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”.

Note

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.

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.

The dryer will continue through the drying and cooling cycles,

until the vended time has expired.

Parts

Note

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.

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.

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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.

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.

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.

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.

Important

A separate warranty card must be completed and

returned for each individual dryer.

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.

Note

Be sure to include the installation date when

returning the warranty card(s).

Important

The frequency of cleaning the lint screen can best

Warranty

be determined from experience at each location.

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.

Weekly

Clean lint accumulation from lint chamber, thermostat, and

microprocessor temperature sensor area.

Warning

To avoid the hazard of electrical shock,

Note

Whenever contacting the Maytag Co. for warranty

discontinue electrical supply to the dryer.

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.

90 Days

Remove lint from gas valve burner area with a dusting brush

or vacuum cleaner attachment.

Routine Maintenance _________________

Cleaning

Clean any lint accumulation in and around the motor(s) casing

opening.

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.

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.

Warning

Note

Lint from most fabrics is highly combustible. The

The accumulation of lint in the exhaust ductwork

can create a potential fire hazard.

accumulation of lint can create a potential fire

hazard. Keep dryer area clear and free from combustible

materials, gasoline, and other flammable vapors and

liquids.

Maytag Co.

113430-10

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Note

7 Days After Installation

and Every 12 Months Thereafter

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 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).

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.

Data Label Information _____________________________________________________________

CE Label

Standard 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.

113430-10

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Part No. 113430

10 - 12/18/08 - 25

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