American Dryer Clothes Dryer ML-200 Installation & Operator's Manual

ML-200 Non-Tilting
Phase 5
Installation/Operator's Manual
WARNING: For your safety the
information in this manual must be
followed to minimize the risk of fire or
explosion or to prevent property damage,
personal injury or death.
AVERTISSEMENT: Assurez-vous de bien
suivre les instructions données dans cette
notice pour réduire au minimum le risque
d’incendie ou d’explosion ou pour éviter tout
dommage matériel, toute blessure ou la mort.
Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any
other appliance.
Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.
WHAT DO YOU DO IF YOU SMELL GAS
* 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.
QUE FAIRE SI VOUS SENTEZ UNE ODEUR
DE GAZ:
* Ne pas tenter d’allumer d’appareil.
* Ne touchez à aucun interrupteur. Ne pas
vous servir des téléphones se trouvant dans
le bâtiment où vous vous trouvez..
* Évacuez la pièce, le bâtiment ou la zone.
* Appelez immédiatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
* Si vous ne pouvez rejoindre le fournisseur
de gaz, appelez le service des incendies.
L’installation et l’entretien doivent être assurés
par un installateur ou un service d’entretien
qualifié ou par le fournisseur de gaz.
For replacement parts, contact the distributor from which the dryer
was purchased or
American Dryer Corporation
88 Currant Road
Fall River MA 02720-4781
Telephone: (508) 678-9000 / Fax: (508) 678-9447
e-mail: [email protected]
041800TS/tcosta
ADC Part No. 113142
Retain This Manual In A Safe Place For Future Reference
American Dryer Corporation products embody advanced concepts in engineering, design, and safety. If this product is
properly maintained, it will provide many years of safe, efficient, and trouble-free operation.
ONLY qualified technicians should service this equipment.
OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or specified in the installation/operator's manual
included with the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
FOR YOUR SAFETY
POUR VOTRE SÉCURITÉ
Do not store or use gasoline or
other flammable vapors or liquids
in the vicinity of this or any other
appliance.
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables dans le voisinage de cet
appareil ou de yout autre appareil.
We have tried to make this manual as complete as possible and hope you will find it useful. ADC reserves the right to make
changes from time to time, without notice or obligation, in prices, specifications, colors, and material, and to change or
discontinue models.
Important
For your convenience, log the following information:
DATE OF PURCHASE
MODEL NO.
ML-200 Non-Tilting
DISTRIBUTORS NAME
Serial Number(s)
Replacement parts can be obtained from your distributor or the ADC factory. When ordering replacement parts from the
factory, you can FAX your order to ADC at (508) 678-9447 or telephone your orders directly to the ADC Parts Department at
(508) 678-9000. Please specify the dryer model number and serial number in addition to the description and part number, so
that your order is processed accurately and promptly.
“IMPORTANT NOTE TO PURCHASER”
Information must be obtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions must be posted in a
prominent location near the dryer.
IMPORTANT
YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and THE GAS
SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS or GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING OF ANY EQUIPMENT per OSHA (Occupational
Safety and Health Administration) STANDARDS.
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
«Attention: Lor des opérations d’entretien
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»
CAUTION
DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYERS.
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERATION.
FOR YOUR SAFETY
DO NOT DRY MOP HEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE OF DRY CLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the door switch or the heat circuit devices
ever be disabled.
WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panels removed. PERSONAL INJURY or FIRE COULD RESULT.
WARNING
DRYER MUST NEVER BE OPERATED WITHOUT THE LINT FILTER (SCREEN) IN
PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or
specified in the installation/operator's manual included with the dryer.
Dryers must not be installed or stored in an area where it will be exposed to water or weather.
The wiring diagram for the dryer is located in the front electrical control box area.
Table of Contents
SECTION I
IMPORTANT INFORMATION ............................................................................... 3
A. RECEIVING and HANDLING ................................................................................................. 3
B. SAFETY PRECAUTIONS ........................................................................................................ 4
SECTION II
SPECIFICATIONS/DIMENSIONS and COMPONENT IDENTIFICATION . 6
A. SPECIFICATIONS (GAS and STEAM Models) ....................................................................... 6
B. ML-200 DIMENSIONS and COMPONENT LOCATION ...................................................... 7
SECTION III
INSTALLATION PROCEDURES ........................................................................... 9
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
REASSEMBLY OF DRYER ...................................................................................................... 9
LOCATION REQUIREMENTS .............................................................................................. 12
FRESH AIR SUPPLY .............................................................................................................. 13
EXHAUST REQUIREMENTS ................................................................................................ 14
COMPRESSED AIR SUPPLY SYSTEM ................................................................................ 16
ELECTRICAL INFORMATION ............................................................................................. 17
GAS INFORMATION ............................................................................................................ 21
STEAM INFORMATION ....................................................................................................... 25
PREPARATION FOR OPERATION/START-UP .................................................................... 29
PREOPERATIONAL TESTS .................................................................................................. 30
SHUT DOWN INSTRUCTIONS ........................................................................................... 32
SECTION IV
SERVICE/PARTS INFORMATION ...................................................................... 33
A. SERVICE ................................................................................................................................ 33
B. PARTS ..................................................................................................................................... 33
SECTION V
WARRANTY INFORMATION .............................................................................. 34
A. RETURNING WARRANTY CARD(S) ................................................................................... 34
B. WARRANTY .......................................................................................................................... 34
C. RETURNING WARRANTY PART(S) .................................................................................... 34
SECTION VI
ROUTINE MAINTENANCE .................................................................................. 36
A. CLEANING ............................................................................................................................ 36
B. ADJUSTMENTS ..................................................................................................................... 38
C. LUBRICATION ...................................................................................................................... 38
SECTION VII
COMPONENT SYSTEM DESCRIPTIONS ........................................................ 39
A.
B.
C.
D.
E.
TUMBLER (BASKET) DRIVE SYSTEM ............................................................................... 39
TUMBLER/BASKET .............................................................................................................. 39
AIR BLOWER DRIVE SYSTEM ............................................................................................ 39
SAFETY DEVICES ................................................................................................................. 40
STEAM DAMPER ACTUATOR SYSTEM ............................................................................. 41
SECTION VIII
TROUBLESHOOTING ........................................................................................... 42
SECTION IX
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS ....................................................................................................... 51
SECTION X
MANUAL RESET HI-LIMIT INSTRUCTIONS ................................................. 54
SECTION I
IMPORTANT INFORMATION
A. RECEIVING and HANDLING
The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover
(or optional box) as a means of preventing damage in transit. Upon delivery, the dryer and/or packaging, and
wooden skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect
further before delivering carrier leaves.
Dryers damaged in shipment:
1. ALL dryers should be inspected upon receipt and before they are signed for.
2. If there is suspected damage or actual damage, the trucker's receipt should be so noted.
3. If the dryer is damaged beyond repair, it should be refused. Those dryers which were not damaged in a
damaged shipment should be accepted, but the number received and the number refused must be noted
on the receipt.
4. If you determine that the dryer was damaged after the trucker has left your location, you should call the
delivering carrier's freight terminal immediately and file a claim. The freight company considers this
concealed damage. This type of freight claim is very difficult to get paid and becomes extremely difficult
when more than a day or two passes after the freight was delivered. It is your responsibility to file freight
claims. Dryer/parts damaged in transit cannot be claimed under warranty.
5. Freight claims are the responsibility of the consignee, and ALL claims must be filed at the receiving end.
ADC assumes no responsibility for freight claims or damages.
6. If you need assistance in handling the situation, please contact the ADC Traffic Manager at
(508) 678-9000.
IMPORTANT: The tumbler section of the dryer must be transported and handled in an upright
position at ALL times.
3
B. SAFETY PRECAUTIONS
WARNING: For your safety, the information in this manual must be followed to minimize
the risk of fire or explosion or to prevent property damage, personal injury, or
loss of life.
WARNING: The dryer must never be operated with any of the back guards, outer tops, or
service panels removed. PERSONAL INJURY or FIRE COULD RESULT.
1. DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other
appliance.
2. Purchaser/user should consult the local gas supplier for proper instructions to be followed in the event
the user smells gas. The instructions should be posted in a prominent location.
3. WHAT TO DO IF YOU SMELL GAS...
a. DO NOT try to light any appliance.
b. DO NOT touch any electrical switch.
c. DO NOT use any phone in your building.
d. Clear the room, building, or area of ALL occupants.
e. Immediately call your gas supplier from a neighbor's phone. Follow the gas supplier's instructions.
f. If you cannot reach your gas supplier, call the fire department.
4. Installation and service must be performed by a qualified installer, service agency, or gas supplier.
5. Dryer(s) must be exhausted to the outdoors.
6. Although ADC produces a very versatile machine, there are some articles that, due to fabric composition
or cleaning method, should not be dried in it.
WARNING: Dry only water-washed fabrics. DO NOT dry articles spotted or washed in dry
cleaning solvents, a combustible detergent, or "all purpose" cleaner.
EXPLOSION COULD RESULT.
WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,
or wax.
EXPLOSION COULD RESULT.
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvents will create a
fire hazard.
4
WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or
similarly textured rubber materials. Drying in a heated tumbler (basket) may damage
plastics or rubber and also may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the heating unit area, exhaust
duct work, and inside the dryer. The frequency of inspection and cleaning can best be determined from
experience at each location.
WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire
hazard.
8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the
National 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 do so will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, heat safety circuit
ever be disabled.
WARNING: PERSONAL INJURY or FIRE COULD RESULT.
10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.
11. Remove articles from the dryer as soon as the drying cycle has been completed.
WARNING: Articles left in the dryer after the drying and cooling cycles have been completed
can create a fire hazard.
12. DO NOT operate steam dryers with more than 125 PSI (8.62 bars) steam pressure. Excessive steam
pressure can damage steam coil and/or harm personnel.
13. Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with
leaking flexible hoses. PERSONAL INJURY MAY RESULT.
14. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.
WARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY
and THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY COVERS
or GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW
ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or TESTING
OF ANY EQUIPMENT per OSHA (Occupational Safety and Health
Administration) STANDARDS.
5
SECTION II
SPECIFICATIONS/DIMENSIONS and
COMPONENT IDENTIFICATION
A. SPECIFICATIONS (GAS and STEAM Models)
200 lbs.
90.9 kg
Tumbler (BASKET) Diameter
Tumbler (BASKET) Depth
62-1/2"
42"
158.75 cm
106.7 cm
Tumbler (BASKET) Motor
Door Opening (DIAMETER)
Door Sill Height
3 HP
36-3/4" w x 43" h
36-1/2"
2.24 kw
93.35 cm x 109.2 cm
Tumbler (BASKET) Volume
74.5 cu. ft.
Gas
Maximum Capacity (D RY WEIGHT)
Voltage Available
Heat Input
Blower Motor
Approx. Weight (UNCRATED)
Airflow
208-600v / 3Ø / 3, 4w 50/60 Hz
189,000 kcal/hr
750,000 btu/hr
5.6 kw
7-1/2 HP
3,369
5,300 cfm
Inlet Size
Voltage Available
Steam
92.71 cm
2.11 cu. m.
1,528.2 kg
150.16 cmm
1-1/4"
3.18 cm
208-600v / 3Ø / 3, 4w 50/60 Hz
Blower Motor
Approx. Weight (CRATED)
Heat Input
15 HP
3,719 lbs.
Steam Consumption
890 lbs./hr
404.5 kg/hr
6,500 cfm
2"
125 PSI max
184.16 cmm
5.08 cm
8.79 kg/sq cm
1/8" F.P.T.
---
Airflow
Inlet Size
Operating Steam Pressure
Compressed Air Connection
11.2 kw
1,687 kg
27 Bhp
Shaded areas are stated in metric equivalents
IMPORTANT: Gas dryers and steam dryers must be provided with a clean, dry, regulated 80PSI
+/-10 PSI (5.51 bars +/- 0.68 bars) air supply.
NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT
ANY TIME, WITHOUT NOTICE or OBLIGATION.
6
B. ML-200 DIMENSIONS and COMPONENT LOCATION
7
8
SECTION III
INSTALLATION PROCEDURES
Installation in a proper location should be performed by competent technicians in accordance with local and
state codes. In the absence of these codes, the installation must conform to applicable American National
Standards: ANSI Z223.1-LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST
EDITION (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).
A. REASSEMBLY OF DRYER
IMPORTANT: Always keep the tumbler (basket) section of the dryer in an upright position when
moving it.
The ML-200 (gas model dryer) may be shipped
one of two ways; as a complete unit fully assembled and ready for hookup or in two (2)
pieces with the middle frame separated from
the base. At installation, the middle frame will
be lifted onto the base. Use cables through
the eye bolts on top of the middle frame for
lifting. Fasten the middle frame to the base by
using the four (4) #3/8-16 bolts provided with
the unit. Also, reconnect the V-belts, belt guard
at the rear end of the unit, and reconnect the
electrical plugs located in the front control
boxes.
The ML-200 (steam models) can also be
shipped with the middle frame separated from
the base. In this case, follow the instructions
for reassembly of the gas dryer. The steam
dryer may also be shipped with the steam coil
and damper piston removed. If this is the case,
lift the steam coil on top of the middle frame,
with the steam connection pipes facing the right
side of the unit, and bolt the coil to the top of
the middle frame using the #3/8-16 bolts provided. Also, bolt the damper piston and solenoid valve to the top of the middle frame using
the bolts provided. There are three (3) panels
that cover the front, right side, and rear of the
steam coil. Fasten these in position.
9
1. Reconnect the four (4) pin/socket connectors at the bottom of the right control box.
2. Reconnect the three (3) pin/socket connectors at the bottom of the left control box.
3. Reconnect the two (2) pin/socket connectors within the left control box.
4. Rewire the drive motor by inserting the three (3) black wires into the T1, T2, and T3 connections of the
Telemecanique drive contactor.
5. Rewire the blower (impellor/fan) motor by inserting the three (3) blue wires into the T1, T2, and T3
connections of the Telemecanique blower contactor.
10
11
B. LOCATION REQUIREMENTS
The model ML-200 dryer requires 18-inches (45.72 cm) of space on each side of the dryer and 24-inches (60.96
cm) of space behind the unit for ease of maintenance. A minimum of 12-inches (30.48 cm) must be allowed
between the top of a gas dryer and the ceiling. A ceiling height of 120-inches (304.8 cm) is required for gas
dryers, and a ceiling height of 130-inches (330.2 cm) is required for a steam dryers. The dryer must be leveled
for proper operation. If shimming is required, put metal shims which are the same size as the base feet. The
dryer must be lagged to the floor.
Before installing the dryer, be sure the location conforms to local codes and ordinances.
1. 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.
IMPORTANT: "The dryer must be installed on non-combustible floors only."
IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be necessary.
12
C. FRESH AIR SUPPLY
When the dryer is operating, it draws in room air, heats it, passes this air through the tumbler (basket), and
exhausts it out of the building. Therefore, the room air must be continually replenished from the outdoors. If the
make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and sail
switch "fluttering" problems may result, as well as premature motor failure from overheating.
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 5,300 cfm (cubic feet per minute) - 150 cmm
(cubic meters per minute) - must be supplied to each gas dryer and 6,500 cfm (cubic feet per minute) - 184 cmm
- must be supplied to each steam dryer. As a general rule, an unrestricted air entrance from the outdoors
(atmosphere) of a minimum of 5 square feet (0.46 square meters) for each gas dryer and a minimum of 6 square
feet (0.56 square meters) is required for a steam dryer.
To compensate for the use of registers or louvers used over the openings, this make-up air area must be
increased by approximately thirty-three percent (33%). Make-up air openings should not be located in an area
directly near where exhaust vents exit the building.
It is not necessary to have separate make-up air openings for each dryer. Common make-up air is distributed
equally to ALL dryers. However, they must be set up in such a manner that the make-up air is distributed
equally to ALL the dryers.
IMPORTANT:
Make-up air openings should not be located near duct work exhaust outlets.
If the make-up air openings is too close to the exhaust outlet, lint and fumes may be
drawn into the dryer area through these openings.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT:
Make-up air must be provided from a source free of dry cleaning fumes. Makeup air that is contaminated by dry cleaning solvent fumes will result in irreparable
damage to motors and other components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.
13
D. EXHAUST REQUIREMENTS
1. General Exhaust Duct Work Information
Exhaust duct work should be designed and installed by a qualified professional. Improperly sized duct
work will create excessive back pressure which results in slow drying, increased use of energy, over
heating of the dryer, and shut down of the burner by the airflow (sail) switches, burner hi-limits, or tumbler
(basket) hi-heat thermostats.
CAUTION: DRYER MUST BE EXHAUSTED TO THE OUTDOORS.
CAUTION: IMPROPERLY SIZED or INSTALLED EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
NOTE: When a dryer is exhausted separately, it is recommended that a back draft damper be
installed.
NOTE: THE ML-200 MUST BE INDEPENDENTLY EXHAUSTED. COMMON DUCT
WORK IS NOT ACCEPTABLE.
The duct work should be laid out in such a way that the duct work travels as directly as possible to the
outdoors with as few turns as possible. Single or independent dryer venting is recommended.
The internal dimensions of the dryer's rectangular exhaust vent duct work is 8-inches by 20-inches (20.32
cm by 50.8 cm). The plant's exhaust duct must be at least 20-inches (50.8 cm) in diameter or for a
rectangular duct have a cross-sectional area of 315 square inches (2,032 square centimeters). The duct
work from the dryer to the outside exhaust outlet should not exceed 30 feet (9.14 meters). The shape
of the duct work is not critical so long as the minimum cross-sectional area is provided. It is suggested that
the use of 90º turns in ducting be avoided; use 45º angles instead. The radius of the elbows should
preferably be 1-1/2 times the width or diameter of the duct. Excluding basket/dryer elbow connections or
elbows used for outside protection from the weather, no more than two (2) elbows are used, the cross
section area of the duct work must be increased.
ALL duct work should be smooth inside with no projections from sheet metal screws or other
obstructions which will collect lint. When adding ducts, the ducts to be added should overlap the duct
to which it is connected. ALL duct work joints must be taped to prevent moisture and lint from
escaping into the building. Additionally, inspection doors should be installed at strategic points in the
exhaust duct work for periodic inspection and clean-out of lint from the duct work.
IMPORTANT: Exhaust back pressure measured by a manometer in the exhaust duct should not
exceed 0.3 inches of water column (0.74 mb).
NOTE: Where the exhaust duct work passes through a wall, ceiling, or roof made of combustible
materials, the opening must be 2-inches (5.08 cm) larger (all the way around) than the duct.
The duct must be centered within this opening.
14
a. Outside Duct Work Protection
1) To protect the outside end of horizontal duct work from the weather, a 90º elbow bent downward
should be installed where the exhaust exits the building. If the duct work travels vertically up
through the roof, it should be protected from the weather by using a 180º turn to point the opening
downward. In either case allow at least twice the diameter of the duct between the duct opening
and the nearest obstruction.
IMPORTANT: DO NOT use screens or caps on the outside of opening of exhaust duct work.
15
E. COMPRESSED AIR SUPPLY SYSTEM
A clean, dry, regulated air supply of 80 PSI (5.51 bars) compressed air must be supplied to the dryer. The
connection size is 1/8-inch N.P.T. No air filtering or pressure regulating devices are provided with the standard
ML-200 Non-Tilt dryer.
1. Gas Dryers
The air line supply connection is made into the 1/8-inch N.P.T. port on the air jet solenoid valve which is
located in the base of the dryer. (Refer to the illustration below.)
2. Steam Dryers
The air line supply connection is made into the 1/8-inch N.P.T. tee which is located at the left hand side
of the top of the dryer. (Refer to the illustration below.)
16
F. ELECTRICAL INFORMATION
1.
Electrical Requirements
It is your responsibility to have ALL electrical connections made by a properly licensed and competent
electrician to assure that the electrical installation is adequate and conforms with local and state regulations
or codes. In the absence of such codes, ALL electrical connections, material, and workmanship must
conform to the applicable requirements of the National Electrical Code ANSI/NFPA NO. 70-LATEST
EDITION or in Canada, the Canadian Installation Codes CAN/CGA-B149.1-M91 (Natural Gas) or CAN/
CGA-B149.2-M91 (L.P. Gas) 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 connects.
NOTE: The use of aluminum wire will VOID THE WARRANTY.
17
2. Electrical Service Specifications
M LG-200 (Gas)
7.5 Hp Blower/3 Hp Drive M otor
ELECTRIC SERVICE SPECIFICATION (PER
DRYER)
IMPORTANT: 208 VAC and 230 VAC ARE NOT THE SAME. When ordering, specify exact voltage.
NOTES: A. Fuse ratings are dual element-time delay-current limiting, class RK1 or RK5 ONLY.
B. Circuit breakers are thermal magnetic (industrial) type ONLY. For others, calculate/verify correct breaker
size according to appliance amp draw rating and type of breaker used.
C. Circuit breakers for 3Ø dryers must be 3-pole type.
SERVICE
VOLTAGE
PHASE
208
3Ø
230
WIRE
SERVICE
APPROX.
AMP DRAW
MINIMUM FUSING
CIRCUIT
WIRE
Dual Element
BREAKER
Time Delay
SIZE*
60 Hz
50 Hz
3/4
37
---
4
60
80
3Ø
3
36
---
4
60
80
380
3Ø
3/4
---
20
8
30
40
416
3Ø
3/4
---
19
8
30
40
460
3Ø
3/4
18
---
8
30
40
* AWG Stranded Type Wire...for individual lengths less than 100 feet (30.48 meters).
WARNING: 208 VAC and 230 VAC ARE NOT THE SAME. Any damage done to dryer
components due to improper voltage connections will automatically VOID THE
WARRANTY.
IMPORTANT: The dryer must be connected to the electrical supply shown on the data label that
is affixed to the back of the dryer, at the upper right hand corner. In case of 208 VAC
or 230 VAC, the supply voltage must match the electric service specifications of the
data label exactly.
NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT ANY
TIME, WITHOUT NOTICE or OBLIGATION.
18
M LS-200 (Steam)
15 Hp Blower/3 Hp Drive M otor
ELECTRIC SERIVICE SPECIFICATIONS (PER
DRYER)
IMPORTANT: 208 VAC and 230 VAC ARE NOT THE SAME. When ordering, specify exact voltage.
NOTES: A. Fuse ratings are dual element-time delay-current limiting, class RK1 or RK5 ONLY.
B. Circuit breakers are thermal magnetic (industrial) 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 dryers must be 3-pole type.
SERVICE
VOLTAGE
PHASE
WIRE
SERVICE
APPROX.
AMP DRAW
60 Hz
50 Hz
MINIMUM
WIRE
SIZE*
FUSING
Dual Element
Time Delay
CIRCUIT
BREAKER
208
3Ø
3/4
54
---
4
80
90
230
3Ø
3
48
---
4
80
90
380
3Ø
3/4
---
29
10
40
60
416
3Ø
3/4
---
27
10
40
60
460
3Ø
3/4
25
---
10
40
60
* AWG Stranded Type Wire...for individual lengths less than 100 feet (30.48 meters).
WARNING: 208 VAC and 230 VAC ARE NOT THE SAME. Any damage done to dryer
components due to improper voltage connections will automatically VOID THE
WARRANTY.
IMPORTANT: The dryer must be connected to the electrical supply shown on the data label that
is affixed to the back of the dryer, at the upper right hand corner. In case of 208 VAC
or 230 VAC, the supply voltage must match the electric service specifications of the
data label exactly.
NOTE: ADC RESERVES THE RIGHT TO MAKE CHANGES IN SPECIFICATIONS AT ANY
TIME, WITHOUT NOTICE or OBLIGATION.
19
3. Electrical Connections
NOTE: A wiring diagram is included with each dryer and is affixed to the panel inside the right side
control cabinet.
The only electrical input connections to the dryer are the 3-phase (3Ø) power leads (L1, L2, and L3),
GROUND, and in the case of 4 wire service, the Neutral. These electrical connections are made at the
power distribution block located in the left side control cabinet.
Providing local codes permit, power connections to the dryer can be made by the use of a flexible
Underwriters Laboratory listed cord/pigtail (wire size must conform to rating of the dryer), or the dryer
can be hard wired directly to the service breaker. In ALL cases, a strain relief must be used where the
wire(s) enter the dryer electrical service (relay) box.
NOTE: A CIRCUIT SERVING EACH DRYER MUST BE PROVIDED.
4. Main Grounding
Grounding (earth) connections must be provided and installed in accordance with state and local codes. In
the absence of these codes, grounding must conform to applicable requirements of the National 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 ground connection may be to a proven earth ground at the
location service panel.
NOTE: A grounding connection (terminal lug) is provided in the dryer at the left side control cabinet.
For added personal safety, when possible, it is suggested that a separate ground wire (sized per local codes)
be connected from the ground connection of the dryer to a grounded cold water pipe. DO NOT ground to
a gas or hot water pipe. The grounded cold water pipe must have metal to metal connections ALL the
way to electrical ground. If there are any nonmetallic interruptions, such as a meter, pump, plastic, rubber, or
other insulating connectors, they must be jumped out with no. 4 copper wire and securely clamped to bare
metal at both ends.
IMPORTANT: For personal safety and proper operation, the dryer must be grounded. For proper
operation of the microprocessor (computer), an earth (zero) ground is required.
NOTE: Grounding via metallic electrical conduit (pipe) is not recommended.
20
G. GAS INFORMATION
It is your responsibility to have ALL plumbing connections made by a qualified professional to assure that the gas
plumbing installation is adequate and conforms with local and state regulations or codes. In the absence of such
codes, ALL plumbing connections, materials, and workmanship must conform to the applicable requirements of
the National Fuel Gas Code ANSI Z223.1-LATEST EDITION, or in Canada, the Canadian Installation Codes
CAN/CGA-B149.1-M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) 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 and improper operation of the dryer.
The dryer and its individual shut-off valve must be disconnected from the gas supply piping system during any
pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). The dryer must be isolated from
the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas
supply piping system at test pressures equal to or less than 1/2 psig (3.5 kPa).
IMPORTANT: Failure to isolate or disconnect dryer from supply as noted can cause irreparable
damage to the gas valve VOIDING THE WARRANTY.
WARNING: FIRE or EXPLOSION COULD RESULT.
1. Gas Supply
The gas dryer installation must meet the American National Standard...National Fuel Gas Code ANSI
Z223.1-LATEST EDITION, or in Canada, the Canadian Installation Codes CAN/CGA-B149.1 M91 (Natural
Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION, as well as local codes and ordinances
and must be done by a qualified professional.
NOTE: Undersized gas piping will result in ignition problems, slow drying, increased use of
energy, and can create a safety hazard.
The dryer must be connected to the type of heat/gas indicated on the dryer label affixed behind the right
control box door. If this information does not agree with the type of gas available, DO NOT operate the
dryer. Contact the distributor who sold the dryer or the ADC factory.
IMPORTANT: Any burner changes or conversions must be made by a qualified professional.
The input ratings shown on the dryer data label are for elevations up to 2,000 feet (609.6 meters), unless
elevation requirements over 2,000 feet (609.6 meters) were specified at the time the dryer order was placed
with the factory. The adjustment or conversion of the dryers in the field for elevations over 2,000 feet (609.6
meters) are made by changing each burner orifice. If this conversion is necessary, contact the distributor
who sold the dryer or contact the ADC factory.
21
2. Technical Gas Data
a. Gas Specifications
TYPE
OF
G AS
Natural
Manifold Pressure*
Inline Pressure
Liquid Propane
3.5 inches W.C.
8.7 mb
10.5 inches W.C.
26.1 mb
6.0 - 12.0 inches W.C.
14.92 - 29.9 mb
10.5 inches W.C.
26.1 mb
Shaded areas are stated in metric equivalents
* Measured at gas valve pressure tap when the gas valve is on.
b. Gas Connections:
Inlet connection ---- 1-1/4 inch N.P.T.
Inlet Supply Size ---- 1-1/2 inch N.P.T.
Btu/hr input --------- 750,000 (189,000 kcal/hr)
1) Natural Gas
Regulation is controlled by the dryers gas valve internal regulator. Incoming supply pressure must be
consistently between a minimum of 6.0 (14.92 mb) and a maximum of 12.0 inches water column
(29.9 mb) pressure.
2) Liquid Propane (L.P.) Gas
Dryers made for use with liquid propane (L.P.) gas have both of their gas valve's internal pressure
regulators blocked open so that the gas pressure must be regulated upstream of the dryer. The
pressure is measured at each gas valve pressure tap must be a consistent 10.5 inches water column
(W.C.) - 26.1 mb. There is no regulator or regulation provided in an L.P. gas dryer. The water column
must be regulated at the source (L.P. tank) or external regulator/regulation must be added to each
dryer.
TYPE
MODEL
NUMBER
BTU
Per Hour
Rating
kcal/hr
Rating
MLG-200**
750,000
189,000
Natural
Qty. D.M.S.*
5
#1
G AS
Liquid Propane
Part
Part
Qty. D.M.S.*
Number
Number
140840
Shaded area is stated in metric equivalent
*
OF
D.M.S. (Drill Material Size) equivalents are as follows:
Natural Gas ........... #1 = .2280" (5.7912 mm)
Liquid Propane ..... #28 = .1405" (3.5687 mm)
22
5
#28
140821
L.P.
Conversion Kit
Part
Number
880754
3. Piping/Connections
ALL components/materials must conform to National Fuel Gas Code Specifications. It is important that
gas pressure regulators meet applicable pressure requirements and that gas meters be rated for the total
amount of ALL the appliance BTU's being supplied.
The dryer is provided with a 1-1/4" F.P.T. inlet pipe connections extending out of the top of the burner
boxes. The minimum pipe size (supply line) to the dryer is 1-1/2" N.P.T. For ease of servicing, the gas supply
line to each dryer must have its own shut off valve.
The size of the main gas supply line (header) will vary depending on the distance this line travels from the gas
meter or, in the case of L.P. (liquid propane) gas, the supply tank, other gas-operated appliances on the same
supply 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.
Consistent gas pressure is essential at ALL gas connections. It is recommended that a 1-1/4" (3.18 cm) pipe
gas loop be installed in the gas supply line serving a bank of dryers. An in-line pressure regulator must be
installed in the supply line (header) if the (natural) gas pressure exceeds 12.0 inches of water column (29.9
mb) pressure.
IMPORTANT: A water column pressure of 3.5 inches (8.7 mb) for natural gas and 10.5 inches
(26.1 mb) for L.P. dryers is required at the gas valve pressure tap of each dryer for
proper and safe operation.
A 1/8" N.P.T. plugged tap, accessible for a test gauge connection, must be installed in the main gas supply
line immediately upstream of each dryer.
IMPORTANT: Pipe joint compounds that resist the action of natural and L.P. gases must be used.
IMPORTANT: Test ALL connections for leaks by brushing on a soapy water solution (liquid
detergent works well).
WARNING: NEVER TEST FOR GAS LEAKS WITH A FLAME!!!
ALL components/materials must conform to National Fuel Gas Code Specifications ANSI Z223.1LATEST EDITION.
It is important that gas pressure regulators meet applicable pressure requirements, and gas meters be rated
for the total amount of ALL the appliance Btu's being supplied.
IMPORTANT: The dryer and it's individual shut-off valve must be disconnected from the gas supply
piping system during any pressure testing of that system at test pressures in excess of
1/2 psig (3.5 kPa).
NOTE: The dryer must be isolated from the gas supply piping system by closing its individual manual
shut off valve during any pressure testing of gas supply piping system at test pressures equal to
or less than 1/2 psig (3.5 kPa).
23
24
H. STEAM INFORMATION
It is your responsibility to have ALL steam plumbing connections made by a qualified professional to assure that
the installation is adequate and conforms with local and state regulations or codes.
IMPORTANT: Failure to comply with the requirements stipulated in this manual can result in
component failure which will VOID THE WARRANTY.
NOTE: The MLS-200 is manufactured with a pneumatic (piston) damper system which requires an
external supply of air (80 psi +/- 10 psi [5.51 bars +/- 0.68 bars]). See Steam Damper Air
System Connections Section H, item 3.
1. Steam Coil PH Level
The normal PH level for copper type steam coils must be maintained between a value of 8.5 to 9.5. For
steel type steam coils the PH level must be maintained between a value of 9.5 to 10.5. These limits are set
to limit the acid attack of the steam coils.
IMPORTANT: Coil failure due to improper PH level will VOID THE WARRANTY.
2. Steam Requirements - High Pressure
Inlet --------- 2-inch supply line connection
Return ------ 2-inch return line connection
OPERATING STEAM PRESSURE, HIGH PRESSURE
Maximum
Minimum
125 psig
100 psig
Heat Input (Normal Load)
Consumption (Approximate)
8.79 kg/sq cm
7.03. kg/sq cm
27 Bhp
800 lbs/hr
362 kg/hr
Shaded areas are in metric equivalents
3. Installation Instructions
To insure that an adequate supply of steam is provided, be sure that the steam supply and steam return lines
are sized and laid out as stipulated in this manual. Inadequate steam supply and steam return lines or
improper steam plumbing will result in poor performance and can cause component failure. Clean, dry,
regulated steam must be provided to the dryer.
IMPORTANT: Steam coil failure due to water hammer by wet steam will VOID THE WARRANTY.
a. The presence of the condensate in the steam supply will cause water hammer and subsequent heat
exchanger (steam coil) failure. The steam supply connection into the main supply line must be made
within a minimum 10-inch (25.4 cm) riser. This will prevent any condensate from draining towards the
dryer.
25
b. The steam supply piping to the dryer must include a 12-inch (30.48 cm) rise along with a drip trap and
check valve. This will prevent any condensate from entering the steam coil.
c. Flexible hoses or couplings must be used. The dryer vibrates slightly when it runs and this will cause the
steam coil connections to crack if they are hard piped to the supply and return mains.
d. Shut-off valves for each dryer should be installed in the supply, return, and drip trap return lines. This will
allow the dryer to be isolated from the supply and return mains if the dryer needs maintenance work.
e. Install an inverted bucket steam trap and check valve for each unit at least 12-inches (30.48 cm) below
steam coil as close to the coil as possible.
f. A vacuum breaker should be installed in the piping. This will prevent the condensing steam from causing
a vacuum inside the coil and possibly damaging the coil.
g. The supply and return lines should be insulated. This will save energy and provide for safety of the
operator and maintenance personnel.
h. Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly
causing coil damage. ALL horizontal runs of steam supply piping should be pitched 1/4-inch (6.35 mm)
for every 1 foot (0.30 meters) back towards the steam supply header causing any condensate in the line
to drain to the header. Install a bypass trap in any low point to eliminate wet steam.
26
4. Steam Damper Air System Connections
The ML-200 is manufactured with a pneumatic (piston) damper system which requires an external supply of
compressed air. The air connection is made to the steam damper solenoid valve which is located on the outer
top, at the rear left hand corner of the dryer.
a. Air Requirements
Compressed Air Supply
Air Pressure
Normal
80 PSI
5.51 bars
Minimum Supply
70 PSI
4.82 bars
Maximum Supply
90 PSI
6.20 bars
Shaded areas are stated in metric equivalents
b. Air Connection
Air connection to system --- 1/8-inch F.P.T.
c. No air regulation is provided with the dryer. External regulation of 80 PSI (5.51 bars) must be provided.
It is suggested that a regulator/filter gauge arrangement be added to the compressed air line just before
the dryer connection. This is necessary to insure that correct and clean air pressure is achieved.
5. Steam Damper System Operation
The MLS-200 steam damper, as shown in Diagram 1 on page 28, allows the coil to stay constantly charged
eliminating repeated expansion and contraction. When the damper is opened, the air immediately passes
through the already hot coil, providing instant heat to start the drying process. When the damper is closed,
ambient air is drawn directly into the tumbler (basket), allowing a rapid cool down.
27
Diagram 1 shows the damper in the heating (open) mode, allowing heat into the tumbler (basket).
Diagram 2 shows the damper in the cool down (closed) mode, pulling ambient air directly into the
tumbler (basket) without passing through the coils.
NOTE: With the dryer off or with no air supply, the damper is in the cool down mode as shown in
Diagram 2.
6. Steam Damper Air Piston (Flow Control) Operation Adjustment
Steam damper operation was tested and adjusted prior to shipping at 80 PSI (5.51 bars). If steam damper
adjustment is necessary, locate the flow control valve and make the necessary adjustments as noted below.
28
I. PREPARATION FOR OPERATION/START-UP
The following items should be checked before attempting to operate the dryer:
1. Read ALL "CAUTION," "WARNING," and "DIRECTION" labels attached to the dryer.
2. Check incoming supply voltage to be sure that it is the same as indicated on the dryer data label affixed
behind the right control box door. In case of 208 VAC or 230 VAC for dryers with sprinkler option verify
1Ø voltage is correct, the supply voltage must match the electric service exactly.
3. GAS MODELS - check to assure that the dryer is connected to the type of heat/gas indicated on the
dryer data label.
4. GAS MODELS - the sail switch damper assembly was installed and adjusted at the factory prior to
shipping. However, each sail switch adjustment must be checked to assure that this
important safety control is functioning.
5. Check to be sure drive belts between idler pulley and motor pulley have been reconnected.
NOTE: The drive belts were disconnected at factory prior to shipment.
6. GAS MODELS - be sure that ALL gas shut-off valves are in the open position.
7. Be sure ALL side and base panels are on the dryer.
8. Check ALL service doors to assure that they are closed and secure.
9. Be sure lint drawer is securely in place.
NOTE: LINT DRAWER MUST BE ALL THE WAY IN PLACE TO ACTIVATE SAFETY
SWITCH OTHERWISE THE DRYER WILL NOT START.
10. Rotate the tumbler (basket) by hand to be sure it moves freely.
11. Check bolts, nuts, screws, terminals, and fittings for security.
12. Check to insure air supply (80 PSI [5.51 bars]) is connected to the dryer.
13. STEAM MODELS - check to insure ALL steam shut-off valves are open.
29
J. PREOPERATIONAL TESTS
ALL dryers are thoroughly tested and inspected before leaving the factory. However, a preoperational test
should be performed before the dryer is publicly used. It is possible that adjustments have changed in transit or
due to marginal location (installation) conditions.
1. Turn on electric power to the dryer.
2. Make sure loading doors are closed and the lint drawer is closed.
3. Microprocessor (computer) system operational test -- to start the dryer;
a. Display will read "FILL."
b. Press "E" (preprogrammed) cycle key on the touchpad of the keyboard.
c. Display will quickly read..."Ld30," "Lc04," and "F180" (unless special programs requested). These
codes mean that the dryer is in the timed mode and will operate with heat of 180º F (Fahrenheit) - 82º C
(Celsius) - for 30 minutes drying time and have a 4 minute cool down period.
d. Dryer will now start, and the L.E.D. (light emitting diode) display will read "Dr30" (dry mode for 30
minutes) and count downwards in minutes.
NOTE: Dryer can be stopped at any time by opening the main door or by pressing the
"CLEAR/STOP" key. To restart the dryer, press the "ENTER/START" key or a
preprogrammed cycle key (i.e., "E").
NOTE: Pressing touchpad key "A", "B", "C", "D", and "F" will also start the dryer. The six
preprogrammed drying cycles ("A" thru "F") have been stored in the microprocessor
(computer's) memory. Refer to the Programming Manual supplied with the dryer for these
preprogrammed cycles.
4. Check to insure that the tumbler (basket) starts in the clockwise (CW) direction. Additionally, check the
direction of the blower motor to insure that it rotates in the counterclockwise (CCW) direction as viewed
from the left side of the dryer. If it does, the phasing is correct. If the phasing is incorrect, reverse two (2)
of the leads at L1, L2, or L3 of the power supply connections made to the dryer.
IMPORTANT: Dryer blower motor and impellor/fan shaft as viewed from the left side of the dryer
must turn in the counterclockwise (CCW) direction, otherwise the dryer efficiency
will be drastically reduced, and premature component failure can result.
30
5. Heat Circuit Operational Test
a. Gas Models
1) When the dryer is first started (during initial start-up), the burners have a tendency not to ignite on the
first attempt. This is because the gas supply piping is filled with air, so the dryer may have to be
stopped and restarted several times for this air to be purged from the lines.
2) The dryer is equipped with a Direct Spark Ignition (DSI) system which has internal diagnostics. If
ignition is not established after the first attempt, the system will retry two (2) more times. If ignition is
not established after three (3) attempts, the heat circuit DSI module will lockout until it is manually
reset. To reset the DSI system, open and close main doors and restart dryer (press "ENTER/START"
key).
NOTE: During the purging period, verify that ALL gas shut-off valves are open.
3) Once ignition is established, a gas pressure test should be taken at the gas valve pressure tap of each
dryer to assure that the water column pressure is correct and consistent.
NOTE: Water column (W.C.) pressure requirements (measured at both gas valve pressure taps)...
NATURAL GAS ------------- 3.5 INCHES W.C. (8.7 mb).
L.P. GAS ---------------------- 10.5 INCHES W.C. (26.1 mb).
IMPORTANT: There is no regulator provided in an L.P. dryer. The water column (W.C.)
pressure must be regulated at the source (L.P. tank), or an external regulator
must be added to each dryer.
b. Steam Models
1) Check to insure that the steam damper is functioning properly.
6. Make a complete operational check of ALL safety-related circuits (i.e., lint drawer switch and sail switches
on Gas Models).
7. A reversing tumbler (basket) should never be operated with less than a 50 pound (22 kg) load (dry weight).
The size of the load will affect the coast-down and dwell (stop) times. The tumbler must come to a
complete stop before starting in the opposite direction. For automatic (mode) cycle only, the spin and stop
times are not adjustable and have been preprogrammed into the microprocessor controller (computer) for a
2 minute spin time and a 5-second dwell (stop) time.
BASKET COATING
The tumbler (basket) is treated with a protective coating. We suggest dampening old garments or cloth
material with a solution of water and non-flammable mild detergent and tumbling them in the tumbler (basket)
to remove this coating.
31
8. Each dryer should be operated through one (1) complete cycle to assure that no further adjustments are
necessary and that ALL components are functioning properly.
9. Microprocessor (computer) programs/selections...
a. Each microprocessor controller (computer) has been preprogrammed by the factory with the most
commonly used parameter selections. If computer program changes are required, refer to the Computer
Programming Manual which was shipped with the dryer.
K. SHUT DOWN INSTRUCTIONS
In the case where the dryer is to be shut down (taken out of service) for a period of time, the following must be
performed:
1. Discontinue power to the dryer either at the external disconnect switch or the circuit breaker.
2. Disconnect the heat supply:
a. GAS MODELS ... discontinue the gas supply.
1) SHUT OFF external gas supply shut-off valve.
2) SHUT OFF internal gas supply shut-off valve located in the gas valve burner area.
b. STEAM MODELS ... discontinue steam supply.
1) SHUT OFF external (location furnished) shut-off valve.
2) SHUT OFF internal steam valves in the supply lines and the return lines.
32
SECTION IV
SERVICE/PARTS INFORMATION
A. SERVICE
1. Service must be performed by a qualified trained technician, service agency, or gas supplier. If service is
required, contact the distributor from whom the ADC equipment was purchased. If the distributor cannot
be contacted or is unknown, contact the ADC Service Department for a distributor in your area.
NOTE: When contacting the ADC Service Department, be sure to give them the correct model
number and serial number so that your inquiry is handled in an expeditious manner.
B. PARTS
1. Replacement parts should be purchased from the distributor from whom the ADC equipment was
purchased. If the distributor cannot be contacted or is unknown, contact the ADC Parts Department for a
distributor in your area. Parts may also be purchased directly from the factory by calling the ADC Parts
Department at (508) 678-9000 or you may FAX in your order at (508) 678-9447.
NOTE: When ordering replacement parts from the ADC dealer or the ADC factory be sure to
give them the correct model number and serial number so that your parts order can be
processed in an expeditious manner.
33
SECTION V
WARRANTY INFORMATION
A. RETURNING WARRANTY CARD(S)
1. Before any dryer leaves the ADC factory 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, if you file a warranty claim.
a. If a warranty card did not come with your dryer, contact the ADC Warranty Department or ADC Service
Department at (508) 678-9000.
B. WARRANTY
For a copy of the ADC commercial warranty covering your particular dryer(s), contact the ADC distributor from
whom you purchased the equipment and request dryer warranty form. If the distributor cannot be contacted or
is unknown, warranty information can be obtained from the factory by contacting the ADC Warranty
Department at (508) 678-9000.
NOTE: Whenever contacting the ADC factory for warranty or warranty information, be sure to have
the dryer's model number and serial number available so that your inquiry can be handled in
an expeditious manner.
C. RETURNING WARRANTY PART(S)
ALL dryer or parts warranty claims or inquiries should be addressed to the ADC Warranty Parts Department.
To expedite processing, the following procedures must be followed:
1. No parts are to be returned to ADC without prior written authorization ("Return Material Authorization")
from the factory.
NOTE: A R.M.A. ("Return Material Authorization") is valid for only sixty (60) days from date of issue.
a. The R.M.A. issued by the factory, as well as any other correspondence pertaining to the returned part(s),
must be included inside the package with the failed merchandise.
34
2. Each part must be tagged with the following information:
a. Model number and serial number of the dryer from which part was removed.
b. Nature of failure (be specific).
c. Date of dryer installation.
d. Date of part failure.
e. Specify whether the part(s) being returned is for a replacement, a credit, or a refund.
NOTE: If a part is marked for a credit or a refund, the invoice number covering the purchase of
the replacement part must be provided.
NOTE: Warranty tags (ADC Part No. 450064) are available at "no charge" from ADC upon request.
3. The company returning the part(s) must clearly note the complete company name and address on the
outside of the package.
4. ALL returns must be properly packaged to insure that they are not damaged in transit. Damage claims
are the responsibility of the shipper.
IMPORTANT: No replacements, credits, or refunds will be issued for merchandise damaged in transit.
5. ALL returns should be shipped to the ADC factory in such a manner that they are insured and a proof
of delivery can be obtained by the sender.
6. Shipping charges are not the responsibility of ADC. ALL returns should be "prepaid" to the
factory. Any "C.O.D." or "COLLECT" returns will not be accepted.
IMPORTANT: No replacements, credits, or refunds will be issued if the claim cannot be processed
due to insufficient information. The party filing the claim will be notified in writing,
either by "FAX" or "CERTIFIED MAIL - Return Receipt Requested," as to the
information necessary to process claim. If a reply is not received by the ADC
Warranty Department within thirty (30) days from the FAX/letter date, then no
replacement, credit, or refund will be issued, and the merchandise will be discarded.
35
SECTION VI
ROUTINE MAINTENANCE
A. CLEANING
A program and/or schedule should be established for periodic inspection, cleaning, and removal of lint from
various areas of the dryer, as well as throughout the duct work system. The frequency of cleaning can best be
determined from experience at each location. Maximum operating efficiency is dependent upon proper air
circulation. The accumulation of lint can restrict this airflow. If the guidelines in this section are met, an ADC
dryer will provide many years of efficient, trouble-free, and - most importantly - safe operation.
WARNING: LINT FROM MOST FABRICS IS HIGHLY COMBUSTIBLE. THE
ACCUMULATION OF LINT CAN CREATE A POTENTIAL FIRE
HAZARD.
WARNING: KEEP DRYER AREA CLEAR and FREE FROM COMBUSTIBLE
MATERIALS, GASOLINE, and OTHER FLAMMABLE VAPORS and
LIQUIDS.
NOTE: Suggested time intervals shown are for average usage which is considered six (6) to eight (8)
operational (running) hours per day.
SUGGESTED CLEANING SCHEDULE
AFTER EVERY LOAD
Clean the lint basket. A clogged lint basket will cause poor dryer performance. The lint basket is located
in the lint drawer in the base of the dryer. Pull out the lint drawer, brush the lint off the lint basket, and
remove the lint. Inspect lint screen and replace if torn.
NOTE: Frequency of cleaning the lint screen can best be determined from experience at each location.
WEEKLY
Open the hinged panels on each side of the tumbler section and remove any lint accumulation, from the
tumbler drive motor, drive shafts, gear reducer, V-belts, drive wheels, and drive shaft bearings.
Slide the lint basket ALL the way out of the dryer and clean any lint accumulation off of the temperature
sensor bracket, which is located above the lint basket.
WARNING: TO AVOID THE HAZARD OF ELECTRICAL SHOCK, DISCONTINUE
ELECTRICAL SUPPLY TO THE DRYER.
36
STEAM DRYERS ONLY
Clean the steam coil lint screen located on top of the steam coil. (This may have to be done more frequently.)
MONTHLY
Retighten set screws in the collars of the four (4) 1-1/2" (3.81 cm) diameter tumbler drive shaft bearings.
Clean lint accumulation from the gas valve/burner area at the top of the dryer, the fan (impellor) motor, and the
fan (impellor) bearings located in the dryer base.
NOTE: To prevent damage, avoid cleaning and/or touching ignitor/flame-probe assembly.
EVERY 6 MONTHS
Check V-belts for tightness and wear. Retighten or replace if required.
On steam dryers, clean steam coil fins. We suggest using compressed air and a vacuum cleaner with brush
attachment.
NOTE: When cleaning steam coil fins, be careful not to bend the fins. If fins are bent, straighten by
using a fin comb which is available from local air conditioning supply house.
Inspect and remove lint accumulation in customer furnished exhaust duct work system and from dryer's
internal exhaust ducting.
WARNING: THE ACCUMULATION OF LINT IN THE EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
WARNING: DO NOT OBSTRUCT THE FLOW OF COMBUSTION and VENTILATION AIR.
CHECK CUSTOMER FURNISHED BACK DRAFT DAMPERS IN THE
EXHAUST DUCT WORK. INSPECT and REMOVE ANY LINT
ACCUMULATION WHICH CAN CAUSE THE DAMPER TO BIND or STICK.
NOTE: A back draft damper that is sticking partially closed can result in a slow drying and shut down
of the heat circuit safety switches or thermostats.
NOTE: When cleaning the dryer cabinet(s), avoid using harsh abrasives. A product intended for the
cleaning of appliances is recommended.
37
B. ADJUSTMENTS
7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER
Inspect bolts, nuts, screws (bearing set screws), non-permanent gas connections (unions, shut-off valves,
orifices, and grounding connections). Motor and drive belts should be examined. Cracked or seriously frayed
belts should be replaced. Tighten loose V-belts when necessary. Complete operational check of controls and
valves. Complete operational check of ALL safety devices (door switch, lint drawer switch, sail switch, burner
and hi-limit thermostats).
C. LUBRICATION
MONTHLY
The two (2) bearings that support the impellor/fan shaft must be lubricated. Use Shell Alvania #2 grease or its
equivalent. Generically, this grease would be described as an NLGI Grade 2 multipurpose industrial grease
with a lithium thickener and mineral base oil.
EVERY 3 MONTHS
The four (4) bearings that support the drive and idler shafts must be lubricated. Use Shell Alvania #2 grease
or its equivalent. Generically, this grease would be described as an NLGI Grade 2 multipurpose industrial
grease with a lithium thickener and mineral base oil.
38
SECTION VII
COMPONENT SYSTEM DESCRIPTIONS
A. TUMBLER (BASKET) DRIVE SYSTEM
The tumbler (basket) is supported and driven by four (4) 11-inch (27.94 cm) diameter drive wheels. Two (2) of
these wheels are attached to a 1-1/2" (3.81 cm) diameter idler shaft, while the other two (2) are attached to a
1-1/2" (3.81 cm) diameter drive shaft. Each of the wheels is fastened to the shafts by a locking bushing. The
taper lock is made up of two (2) pieces; an inner collar, and an outer sleeve. The inner and outer elements have
matching opposing tapers. As a result, when the nut is tightened, the trantorque contracts onto the shaft and
expands into the drive wheel hub locking the wheel onto the shaft.
The idler shaft and drive shaft are each supported by two (2) 1-1/2" (3.81 cm) diameter pillow block bearings.
These bearings sit on slotted support channels and can be moved inward or outward by the adjustment bolts to
raise or lower the tumbler (basket). The drive shaft sticks out through the back of the dryer and has a 2B V-belt
pulley attached to it with a keypad taper lock bushing. This pulley is connected to a speed reducing idler and then
to the 3 HP (2.23 kw) drive motor by two (2) sets of V-belts.
The speed reducing idler shaft is supported by two (2) 1-1/4" (3.18 cm) diameter pillow block bearings. These
pillow blocks sit on a slotted platform, and they can be moved forward and back by loosening or tightening the
bearing adjustment bolts. This movement is needed to maintain proper tension on the V-belts that run from the
speed-reducing idler to the drive shaft.
The drive motor sits on an adjustable base so that the motor can be moved forward and back, allowing proper
tension to be maintained on the V-belts that run from the motor to the speed-reducing idler.
B. TUMBLER/BASKET
The tumbler (basket) is made of 14-gauge stainless steel perforated panels, four (4) stainless steel ribs, and two
(2) outer tumbler/basket rings. The tumbler (basket) is a completely welded assembly so the perforated panels
are not removable.
C. AIR BLOWER DRIVE SYSTEM
The impellor (fan) used in the ML-200 dryer is a 15-inch (38.1 cm) diameter backwardly inclined squirrel cage
impellor (fan) wheel. It spins in a counterclockwise (CCW) direction looking at the back of the blower housing.
The impellor/fan shaft is mounted in two (2) 1-3/8" (3.49 cm) diameter pillow block bearings, and the shaft is
driven by two (2) B-section V-belts connected to the blower motor.
The blower motor is mounted on an adjustable base. The motor position can be easily adjusted so that proper
tension can be maintained on the V-belts.
39
D. SAFETY DEVICES
1. Load Door Switches
There are two (2) of these switches located under the main loading doors. These switches ensure that
the doors are closed before the dryer can start. If the dryer is started when the load doors are open, the
microprocessor controller (computer) L.E.D. (light emitting diode) display will show "door."
2. Lint Basket Switch
This switch ensures that the lint basket is closed before the dryer can start. This switch is located at the
front of the dryer at the right side of the lint basket. If the lint basket is open when the dryer is started, then
the microprocessor controller (computer) L.E.D. display will show "door."
3. Tumbler (Basket) Hi-Limit Safety Thermostat
This disk temperature switch has a setting of 225º F (107º C). It is located below the tumbler (basket) on the
temperature sensor bracket, along side the computer sensor, and is an automatic reset type of switch.
Access to this switch is gained by sliding/pulling the lint basket completely out of the dryer.
This switch backs up the computer sensor and in case of a computer sensor malfunction will prevent the
tumbler's (basket's) temperature from becoming excessive. If this switch trips, the gas flow to the burner
box will be shut down; however, the tumbler (basket) will still rotate.
4. Burner Box Hi-Limit Safety Thermostat
This disk temperature switch has a setting of 330º F (165º C). It is located on the right side of the burner box,
and it is a manual reset type of switch. This switch ensures that there is proper airflow through the burner
box. Upon a low airflow condition, which may be caused by a clogged lint screen, excessively long or
blocked exhaust duct, or improper make-up air, the temperature in the burner box will increase tripping this
switch. This will shut off the gas flow to the burner box and the dryer will not heat until this thermostat is
reset, however the tumbler (basket) will still run.
5. Sail Switch (for Gas Dryers ONLY)
The sail switch is located in the front top of the burner box. A sail switch consists of a round damper plate
on a lever arm which is in contact with an electric switch. When the air blower comes on, it draws air
through the gas burner. This creates a negative pressure inside the burner box, and this negative pressure
pulls in the round damper and activates the sail switch. If there is an improper (low) airflow through the
dryer, the sail switch damper will not pull in, preventing the heat from coming on.
Low airflow through the dryer will be caused by overly long or blocked exhaust ducting, lack of make-up air,
or a clogged lint screen.
40
E. STEAM DAMPER ACTUATOR SYSTEM
The system consists of a hinged damper plate, pneumatic piston, and 24 volt solenoid valve with a needle valve to
control the speed of the piston actuation. On a call for heat, a 24 volt signal is applied to the 3-way/2-position
solenoid valve. This signal switches the valve so that compressed air is sent to the pistons. The piston rod
extends, pushing the hinged steam damper plate to the opened position. This allows room air to be drawn through
the hot steam coil and then through the tumbler (basket).
When the temperature set point has been reached, the 24 volt signal is removed from the solenoid valve, so that
the solenoid valve blocks the air supply to the piston, and the air in the piston is bled to the atmosphere. The spring
in the piston now retract the piston rod, closing the steam damper: The steam damper plate now covers the steam
coil and allows room air to bypass the coil before entering the tumbler (basket) for a rapid cool down.
The steam damper plate should open and close slowly and smoothly. The speed can be modulated by adjusting
the needle valve knob. Turning the knob clockwise (CW) restricts the compressed airflow and slows down the
steam damper movement. Counterclockwise (CCW) adjustment speeds up the steam damper motion. Upon
completion of adjustment, tighten the needle valve's locking nut.
41
SECTION VIII
TROUBLESHOOTING
IMPORTANT: YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY
and THE GAS SUPPLY or THE STEAM SUPPLY BEFORE ANY
COVERS or GUARDS ARE REMOVED FROM THE MACHINE TO
ALLOW ACCESS FOR CLEANING, ADJUSTING, INSTALLATION, or
TESTING OF ANY EQUIPMENT per OSHA (Occupational Safety and
Health Administration) STANDARDS.
The information provided will help isolate the most probable component(s) associated with the difficulty
described. The experienced technician realizes, however, that a loose connection or broken/shorted wire may be
at fault where electrical components are concerned ... and not necessarily the suspected component itself.
Electrical parts should always be checked for failure before being returned to the factory. The information
provided should not be misconstrued as a handbook for use by an untrained person making repairs.
IMPORTANT: When replacing blown fuses, the replacement must be of the exact rating as the
fuse being replaced. For information provided should not be misconstrued as a
handbook for use by an untrained person in making repairs.
WARNING: ALL SERVICE and TROUBLESHOOTING SHOULD BE PERFORMED BY A
QUALIFIED PROFESSIONAL or SERVICE AGENCY.
WARNING: WHILE MAKING REPAIRS, OBSERVE ALL SAFETY PRECAUTIONS
DISPLAYED ON THE DRYER or SPECIFIED IN THIS MANUAL.
A. No Display...
1. Service panel fuses blown or tripped breaker.
2. Blown F1 (fuse 1) or F2 (fuse 2) on left hand control panel.
3. Failed microprocessor controller (computer).
B. Drive motor is not operating (does not start)...
* Microprocessor controller (computer) relay output indicator (either forward "FWD" or reverse
"REV") is on.
1. Blown drive motor conductor fuse(s)/overload(s).
42
2. Failed drive motor contactor.
3. Failed drive motor.
4. Failed microprocessor controller (computer).
C. Drive motor operates in one direction only ... stops and restarts in same direction...
* Appropriate microprocessor controller (computer) relay output indicator is on.
1. Failed reversing contactor (relay).
* Appropriate microprocessor controller (computer) relay output indicator is off.
1. Failed microprocessor controller (computer).
D. Drive motor operates okay for a few minutes, and then either repeatedly or occasionally trips the
overload protector...
NOTE: When the overload protector trips, the microprocessor controller (computer) L.E.D.
(light emitting diode) display will read "door."
1. Motor is overheating ...
a. Motor air vents clogged with lint.
b. Low voltage to the motor.
c. Failed motor.
d. Tumbler (basket) is binding ... check for obstruction.
e. Failed idler bearings or tumbler bearings.
f. V-belts are too tight.
2. Failed overload protector.
E. Impellor (fan) motor is not operating (does not start)...
* Microprocessor controller (computer) "MTR" relay output indicator is on.
1. Blown blower (impellor/fan) motor contactor fuse(s)/overload(s).
2. Failed blower (impellor/fan) motor contactor (relay)..
3. Failed blower (impellor/fan) motor.
43
* Microprocessor controller (computer) "MTR" relay output indicator is off.
1. Failed microprocessor controller (computer).
F. Blower (fan/impellor) motor operates okay for a few minutes, then either repeatedly or
occasionally trips the overload protector...
NOTE: When the overload protector trips, the microprocessor controller (computer) L.E.D.
(light emitting diode) display will read "door."
1. Motor is overheating ...
a. Motor air vents clogged with lint.
b. Low voltage to the motor.
c. Failed motor.
d. Failed impellor/fan drive bearings.
e. V-belts are too tight.
2. Failed overload protector.
G. Both drive motor and blower (impellor/fan) motor are not operating... microprocessor controller
(computer) L.E.D. (light emitting diode) motor indicator dots and the "MTR" relay output and
forward "FWD" or reverse "REV" L.E.D. indicators are on.
1. Blown drive motor and blower (fan/impellor) motor fuse(s) / overload(s).
2. Failed motors (both blower [fan/impellor] and drive).
H. Both drive motor and blower (fan/impellor) motor not operating... microprocessor controller
(computer) L.E.D. (light emitting diode) motor indicator dots and the "door" L.E.D. indicator are
on but relay output L.E.D. indicators are off (microprocessor controller [computer] L.E.D. display
does not read "door")...
1. Failed microprocessor controller (computer).
I. Both drive motor and blower (impellor/fan) motor run for a few minutes then stop...
microprocessor controller (computer) L.E.D. (light emitting diode) display continues to read time
or percent of extraction and ALL indicator dots are off...
1. Fault in main door switch circuit ...
a. One (1) of the main door switches are out of adjustment.
b. Loose connection somewhere in the door switch circuit.
2. Fault in the lint drawer switch circuit.
44
a. Lint drawer switch is out of proper adjustment.
b. Loose connection in the lint drawer switch circuit.
J. Microprocessor controller (computer) L.E.D. (light emitting diode) display reads "dSFL"
continuously and the buzzer (tone) sounds every 30-seconds...
1. Fault in microprocessor heat sensing circuit ...
a. Failed microprocessor temperature sensor.
b. Blown "dSFL" 1/8-amp fuse on the microprocessor controller (computer).
c. Failed microprocessor controller (computer).
d. Broken wire or connection somewhere between the microprocessor controller (computer) and the
microprocessor temperature sensor.
K. Microprocessor controller (computer) L.E.D. (light emitting diode) display reads "door" and the
microprocessor controller "door" L.E.D. indicator is off...
1. Fault (open circuit) in main door/lint drawer switch circuit ...
a. Lint drawer is not closed ALL the way.
b. Lint drawer switch is out of proper adjustment.
c. Failed lint drawer switch.
d. One (1) of the main door switches has failed.
e. One (1) of the main door switch contact magnets is either missing or broken.
f.
Failed door switch relay.
g. Broken wire/connection in main door or lint drawer switch circuit.
2. Failed 24 VAC step down transformer.
3. Drive and/or blower (impellor/fan) motor thermal overload reset had tripped.
45
4. Blown 24 VAC control circuit fuse (fuse 3).
L.
Microprocessor controller (computer) L.E.D. (light emitting diode) display reads "door" and the
microprocessor controller (computer) "DOOR" L.E.D. indicator is on...
1. Failed microprocessor controller (computer).
M. Microprocessor controller (computer) will not accept any keyboard (touchpad) entries, i.e.,
display reads "FILL" and when keyboard (touchpad) entries are selected, the display continues
to read "FILL"...
1. Failed keyboard (touchpad) label assembly.
2. Failed microprocessor controller (computer).
N.
Microprocessor controller (computer) will only accept certain keyboard (touchpad) entries...
1. Failed keyboard (touchpad) label assembly.
O. Microprocessor controller (computer) locks up and L.E.D. (light emitting diode) display reads
erroneous message(s) or only partial segments...
1. Transient power voltage (spikes)...disconnect power to dryer, wait one minute and reestablish power to
dryer. If problem is still evident ...
a. Failed microprocessor controller (computer).
b. Failed keyboard (touchpad) label assembly.
P.
Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for
5-seconds, L.E.D. (light emitting diode) display reads "dSFL" for approximately 30-seconds and
then returns to "FILL"...
1. Loose connection somewhere between the microprocessor controller (computer) and the microprocessor
temperature sensor.
Q. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds only for
a few seconds, and then the microprocessor controller (computer) L.E.D. (light emitting diode)
display returns to "FILL"...
1. Loose connection somewhere in the main power circuit to the microprocessor controller (computer).
R.
Microprocessor controller (computer) L.E.D. (light emitting diode) display reads "SEFL"...
1. Microprocessor controller (computer) program (Program Location 2) is set incorrectly in the active
mode ("Sen") where the dryer is not equipped with the optional rotation sensor...program must be set as
"nSen."
46
2. Rotational sensor circuit failure...fault somewhere in the tumbler (basket) rotation or circuit...
a. Tumbler (basket) is not rotating...
1) Broken tumbler (basket) drive V-belt(s).
2) Failure in drive motor circuit...refer to Section B, Section C, and Section D on page 42 and
page 43.
b. Faulty rotation sensor.
c. Broken wire or connection between rotation sensor and microprocessor controller (computer).
S.
Microprocessor controller (computer) L.E.D. (light emitting diode) display reads "Hot"...
1. Possible overheating condition...microprocessor controller (computer) has sensed a temperature which
has exceeded 220º F (104º C).
"Hot" display will not clear until temperature sensed has dropped to 220º F (104º C) or lower and the micro
processor controller (computer) is manually reset by pressing the "CLEAR/STOP" key.
T. Gas heating unit is not operating (no heat)...no spark at burner area when the dryers is first
started, and both the heat indicator dot and the "HEAT" relay output L.E.D. (light emitting diode)
are on...
1. Fault in sail switch circuit...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering.
1) Lint drawer/screen is dirty.
2) Restriction in exhaust.
3) No exhaust airflow.
2. Fault in burner hi-limit circuit or tripped manual reset hi-limit (Gas Only) thermostat.
3. Fault in 225º F (107º C) hi-limit circuit or tripped manual reset hi-limit thermostat.
4. Failed Direct Spark Ignition (DSI) module.
5. Failed DSI igniter/flame-probe assembly.
47
U. Heating unit for GAS MODELS or STEAM MODELS is not operating (no heat) and the
microprocessor controller (computer) L.E.D. (light emitting diode) heat indicator dot is on but the
"HEAT" relay output L.E.D. is not on...
1. Failed microprocessor controller (computer).
V. No heat for GAS MODELS ONLY...ignitor sparks, burner goes on then off right away...
1. DSI (Direct Spark Ignition) ignitor/flame-probe out of adjustment...reposition closer to the flame area.
2. Sail switch is fluttering ...
a. Lint drawer/screen is dirty.
b. Restriction in exhaust duct work.
c. Blower impellor/fan going the wrong direction.
3. Insufficient make-up air.
4. Failed ignitor/flame-probe assembly.
5. Failed Direct Spark Ignition (DSI) module.
6. Failed gas valve.
W. No heat for STEAM MODELS ONLY ...both microprocessor controller (computer) L.E.D. (light
emitting diode) heat indicator dot and the "HEAT" relay output L.E.D. are on...
1. Fault in 225º F (107º C) hi-heat (limit) switch circuit or tripped manual reset hi-limit thermostat.
2. No (external) compressed air to steam damper...80 PSI (5.51 bars) required.
3. Failed steam damper 24 VAC pneumatic solenoid valve.
4. Failed steam damper piston.
5. Steam damper stuck closed.
X. Dryer operates but is taking too long to dry...
1. Exhaust duct work run too long or is undersized...back pressure cannot exceed 0.3 inches W.C. (0.74 mb).
2. Restriction in duct work...check duct from dryer ALL the way to the outdoors.
3. Low and/or inconsistent gas pressure ... for GAS MODELS ONLY.
4. Insufficient make-up air.
5. Poor air/gas mixture at burner - yellow or poor flame pattern...adjust gas burner air adjustment shutters ...
for GAS MODELS ONLY.
48
6. Lint drawer/screen is not being cleaned on a regular basis or often enough.
7. Extractors (washers) are not performing properly.
8. Sail switch is fluttering...restriction in exhaust... for GAS MODELS ONLY.
9. Failed microprocessor controller (computer)...temperature calibration is inaccurate.
10. Failed microprocessor temperature sensor...calibration is inaccurate.
11. Steam damper system is not functioning properly ... for STEAM MODELS ONLY...
a. Steam damper sticking closed.
b. Leak in pneumatic system.
Y. Excessive noise and/or vibration...
1. Dryer is not leveled properly.
2. Impellor (fan) out of balance ...
a. Excessive lint build up on impellor (fan)...check air jet.
b. Failed impellor (fan).
3. Loose motor mount.
4. Failed idler bearings and/or tumbler bearings.
5. V-belt(s) either too tight or too loose.
6. Tumbler (basket) drive wheels are worn or loose.
7. Set screws of the tumbler drive shaft bearings are too loose.
8. Failed motor bearings.
9. Drive wheel trantorque is too loose.
Z. Scrapping or rubbing noise in tumbler (basket) area or around front or rear panels...
1. Check for object(s) caught somewhere in tumbler (basket).
2. Misadjusted thrust wheel(s).
3. Failed thrust wheel(s).
49
AA.
Tumbler (basket) jumps or makes excessive noise when dryer is first started or between
forward and reverse cycles...
1. Tumbler (basket) out of alignment.
BB.
Blower (impellor/fan) air jet does not activate at the end of the cooling cycle...
* With microprocessor controller (computer) "A JET" relay output L.E.D. (light emitting diode) is on.
1. Fault in compressed air supply.
2. Failed air jet.
* With microprocessor controller (computer) "A JET" relay output L.E.D. (light emitting diode) is off.
1. Failed microprocessor controller (computer)..
50
SECTION IX
PROCEDURE FOR FUNCTIONAL CHECK OF
REPLACEMENT COMPONENTS
1. Microprocessor (computer) Board
a. Upon completing installation of the replacement microprocessor (computer) board, reestablish power to
the dryer.
b. Start the drying cycle.
c. Verify that the motor(s) and the heat indicator dots, in the microprocessor (computer) L.E.D. (light emitting
diode) display are on. (Refer to the illustration below.)
d. Verify that motor(s) heat, and door indicator lights on the back side of the microprocessor (computer)
board are lit. (Refer to illustration below.)
51
e. Open main door. The dryer must stop and ALL output indicator lights on the back side of the
microprocessor (computer) board must go out.
f. Try to restart the dryer with the main door open.
g. The microprocessor (computer) board's L.E.D. (light emitting diode) display must read "DOOR."
h. Close the main door and restart the dryer.
i. Functional check of microprocessor (computer) board is complete.
2. For Models With Johnson Controls DSI (Direct Spark Ignition) Module (G760)
Theory Of Operation;
Start the drying cycle. When the gas burner ignites within the chosen trial for ignition time (6-seconds), the
flame sensor detects gas burner flame and signals the Direct Spark Ignition (DSI) module to keep the gas
valve open...as long as there is a call for heat. The DSI module will “LOCKOUT” if the gas burner flame
is not sensed at the end of the trial for ignition period. The trial for ignition period will be repeated for a total
of three (3) retries/trials (the initial try and two [2] more retries/trials). If the flame is not sensed at the end
of the third retry/trial (inter-purge period of 30-seconds) the DSI module will “LOCKOUT” (L.E.D. [light
emitting diode] flashes).
A steady L.E.D. (light emitting diode) indicator indicates normal operation.
No L.E.D. (light emitting diode) indicator indicates a power or an internal failure has occurred.
52
3. For Direct Spark Ignition (DSI) System Models Manufactured With ADC Module Part No. 880815
a. Upon completing installation of the
replacement Direct Spark Ignition (DSI)
module, reestablish power to the dryer.
b. Start the drying cycle.
c. The ignition (DSI) module’s L.E.D. (light
emitting diode) indicator will be “off” for up
to approximately 1.5-seconds (prepurge
time).
d. The module’s indicator light will then turn
“green.” The gas valve will be energized
and the ignitor probe will spark for
approximately 8-seconds. The burner flame
should now be established. If the L.E.D.
on the module lights “green” continuously,
then the system is functioning properly. A
flashing “green” L.E.D. (lockout mode)
indicates that ignition flame has not been
confirmed.
e. With the burner flame on, remove the flame
sensor wire from the sense terminal of the
DSI module.
f. The burner flame must shut off and the ignition module must lockout with the DSI module’s indicator
light flashing “green.”
g Stop the drying cycle, with the flame sensor wire still removed, restart the drying cycle.
h. The ignition module must proceed through the prepurge, with the indicator light “off,” the ignition trial
time of approximately 8-seconds, with the indicator light “green,” and then proceed to lockout with the
indicator light flashing “green.”
i. Functional check of the Direct Spark Ignition (DSI) Module is complete.
1) Replace the flame sensor wire from the FS terminal to the DSI module.
53
SECTION X
MANUAL RESET HI-LIMIT INSTRUCTIONS
IMPORTANT
MANUAL RESET HI-LIMIT INSTRUCTIONS
FOR GAS MODELS WITH PHASE 5
This dryer was manufactured with a manual reset burner hi-limit and tumbler/lint chamber hi-limit thermostat
which is monitored by the Phase 5 computer. If either manual reset thermostat is open prior to start of the
drying cycle, the dryer will start momentarily and then shut down.
The open manual reset hi-limit thermostat must be reset “manually” prior to the start of the next cycle.
This hi-temperature condition may be caused due to a restricted exhaust, poor airflow or improper burner
oven operation.
The location of the manual reset hi-limit is on the right side of the burner box and the tumbler hi-limit is
located in the lint chamber area.
WARNING: Discontinue power to dryer before attempting to reset hi-limit.
IMPORTANT
This dryer is equipped with a burner
hi-limit and tumbler/lint chamber hi-limit
thermostat which must be reset manually.
WARNING: Discontinue power to dryer
before attempting to reset hi-limit.
ADC P/N: 114093
54
ADC 113142
1- 04/21/00-8