ADC AD-464 User Manual
AD-464 Service Manual
American Dryer Corporation
88 Currant Road
Fall River, MA 02720-4781
Telephone: (508) 678-9000 / Fax: (508) 678-9447
e-mail: techsupport@amdry.com
ADC Part No. 450186020399DMG/abe
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
Do not store or use gasoline or
other flammable vapors or liquids
in the vicinity of this or any other
appliance.
We have tried to make this manual as complete as possible and hope you will find it useful. 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.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables dans le voisinage de cet
appareil ou de yout autre appareil.
Important
For your convenience, log the following information:
DATE OF PURCHASE MODEL NO.
DISTRIBUTORS NAME
Serial Number(s)
AD-464
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.
The illustrations on the following pages may not depict your particular dryer exactly. The illustrations are a composite of the
various dryer models. Be sure to check the descriptions of the parts thoroughly before ordering.
“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.
«Attention: Lor des opérations d’entretien
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
de panne.»
CAUTION
DRYERS SHOULD NEVER BE LEFT UNATTENDED WHILE IN OPERATION.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYER(S).
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 and/or
specified in the installation and operator's manual included with the dryer.
Dryers must not be installed or stored in an area where it will be exposed to water or weather.
The wiring diagram for the dryer is located in the front electrical control box area.
Table of Contents
SECTION I
SAFETY PRECAUTIONS .................................................................................................................. 3
SECTION II
ROUTINE MAINTENANCE .............................................................................................................5
A. Cleaning ..................................................................................................................................... 5
B. Lubrication .................................................................................................................................. 7
C. Adjustments ................................................................................................................................ 8
SECTION III
SPECIFICATIONS .............................................................................................................................. 9
A. Gas Models (ADG-464) ............................................................................................................. 9
B. Steam Models (ADS-464) ........................................................................................................ 10
C. Electrical Service Specifications ................................................................................................. 11
SECTION IV
INSTALLATION REQUIREMENTS ............................................................................................. 12
A. Enclosure/Air Supply/Exhaust Requirements .............................................................................. 12
B. Electrical and Gas Requirements ................................................................................................ 13
SECTION V
COMPONENT DESCRIPTION/REPLACEMENT ....................................................................... 14
A. Tumbler Support and Drive System ........................................................................................... 14
B. Main Air Blower/Heat Reclaimer System ................................................................................... 16
C. Compressed Air System ........................................................................................................... 18
D. Safety Devices .......................................................................................................................... 22
E. Blower (Squirrel Cage Fan) Motor Assembly ............................................................................ 24
F. Blower (Squirrel Cage Fan) Electrical Components .................................................................... 29
G. Tumbler (Basket) System ........................................................................................................... 31
H. Rotational Sensor Assembly ....................................................................................................... 39
I. Top Of Tumbler (Basket) Temperature Door Assembly ............................................................. 41
J. Tumbler (Basket) Electrical Components .................................................................................... 42
SECTION VI
PLC (PROGRAMMABLE LOGIC CONTROLLER) SYSTEM .................................................. 44
A. PLC (Programmable Logic Controller) Description .................................................................... 44
B. PLC (Programmable Logic Controller) Component Replacement ............................................... 48
SECTION VII
BASE SECTION ............................................................................................................................... 76
A. Lint Drawer/Lint Chamber Switches .......................................................................................... 76
B. Resistive Temperature Device .................................................................................................... 79
SECTION VIII
SPRINKLER SYSTEM .................................................................................................................... 81
A. Sprinkler System Description .................................................................................................... 81
SECTION IX
AIR JET SYSTEM ............................................................................................................................ 85
A. Air Jet System .......................................................................................................................... 85
SECTION X
STACK VALVE ASSEMBLY ........................................................................................................... 86
A. Pneumatic Valve ........................................................................................................................ 86
SECTION XI
PENDANT ASSEMBLY ................................................................................................................... 91
A. Pendant Assembly Description .................................................................................................. 91
SECTION I
SAFETY PRECAUTIONS
CAUTION: The dryer should never be left unattended while in operation.
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
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.
ALL occupants.
WARNING: DO NOT dry rags or articles coated or contaminated with gasoline, kerosene, oil, paint,
or wax.
EXPLOSION COULD RESULT.
3
WARNING: DO NOT dry mop heads. Contamination by wax or flammable solvent will create a fire
hazard.
WARNING: DO NOT use heat for drying articles that contain plastic, foam, sponge rubber, or
similarly textured rubberlike materials. Drying in a heated basket (tumbler) may damage
plastics or rubber and also may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct
work, and area around the back of the dryer. The frequency of inspection and cleaning can best be
determined from experience at each location.
WARNING: The collection of lint in the burner area and exhaust duct work can create a potential fire
hazard.
8. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the
NATIONAL ELECTRIC CODE ANSI/NFPA NO. 70-LATEST EDITION.
NOTE: Failure to do so will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety
circuit, ever be disabled.
WARNING: PERSONAL INJURY or FIRE COULD RESULT.
10. This dryer is not to be used in the presence of dry cleaning solvents or fumes.
11. Remove articles from the dryer as soon as the drying cycle has been completed.
WARNING: Articles left in the dryer after the drying and cooling cycles have been complete can
create a fire hazard.
12. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.
IMPORTANT: Label ALL wires prior to disconnection when servicing the microprocessor controller
(computer) and the ignition module. WIRING ERRORS CAN CAUSE
IMPROPER and DANGEROUS OPERATION.
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.
4
SECTION II
ROUTINE MAINTENANCE
A. CLEANING
A schedule should be established for periodic inspection, cleaning, and removal of lint from various areas of the
dryer, as well as throughout the duct work system. The frequency of cleaning can best be determined from
experience at each location. Maximum operating efficiency is dependent upon proper air circulation. The
accumulation of lint can restrict this air flow. If the guidelines in this section are met, an 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: REMOVE POWER FROM THE MACHINE BEFORE PERFORMING ANY
MAINTENANCE IN THE DRYER.
NOTE: Suggested time intervals shown are for average usage which is considered six (6) to eight (8)
operational (running) hours per day.
SUGGESTED CLEANING SCHEDULE
EVERY THIRD or FOURTH LOAD
Clean the lint screen. A clogged lint screen will cause poor dryer performance. The lint screen is located in
the lint drawer in the base of the dryer. Pull out the lint drawer, brush the lint off the lint screen, and remove
the lint. Inspect the lint screen and replace if torn.
NOTE: The frequency of cleaning the lint screens 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, drive 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.
5
MONTHLY
Empty the compressed air filter bowl.
Clean any lint accumulation from the gas valve and burner area at the top of the dryer, the fan (impellor/
blower) motor, and the fan (impellor) bearings located in the dryer base.
EVERY 6 MONTHS
STEAM MODELS - clean the 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 any local air conditioning supply house.
Inspect and remove any lint accumulation in customer furnished exhaust duct work system and from the
dryers internal exhaust ducting.
NOTE: THE ACCUMULATION OF LINT IN THE EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
NOTE: 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: When cleaning the dryer cabinet(s), avoid using harsh abrasives. A product intended for the
cleaning of appliances is recommended.
Clean off any lint accumulation on top of the temperature probe and the hi-limit switch located above the lint
basket.
6
B. LUBRICATION
MONTHLY
Check compressed air filter bowl for water. Empty by pressing the rubber petcock to the side. Additionally,
check lubricator bowl for oil. If empty, remove the fill plug and add oil. (
misting oil.) Replace the fill plug.
Use petroleum based 10/150 SSU
NOTE: LUBRICATOR SHOULD BE SET AT 1 DROP PER CYCLE.
NOTE: REGULATOR PRESSURE IS TO BE SET AT 80 PSI.
Apply high temperature grease to the four (4) 2" diameter tumbler drive shaft pillow block bearings and the
two (2) 1-3/4" diameter blower shaft pillow block bearings. (Use Shell Alvania #3 grease or equivalent.)
7
EVERY 6 MONTHS
Change gear oil in the tumbler shaft gear reducer.
1. Remove the drain plug (located at the bottom rear of the reducer).
2. After oil is completely drained replace the drain plug.
3. Remove the vent plug and pour in
SAE 90, or equivalent.
1.4 liters of Mobil Oil DTE HH5G (I.S.O. viscosity grade 460),
C. ADJUSTMENTS
7 DAYS AFTER INSTALLATION and EVERY 6 MONTHS THEREAFTER
Inspect bolts, nuts, screws, (bearing set screws), nonpermanent gas connections (i.e., unions, shut-off
valves, orifices), and grounding connections. Fan (impellor) V-belts, along with the motor and drive belts
should be examined and replaced if necessary. Tighten loose V-belts when necessary. Complete
operational check of controls and valves. Complete operational check of ALL safety devices (i.e., door
switches, lint drawer switch, sail switch, burner and hi-limit thermostats).
8
SECTION III
A. GAS MODELS (ADG-464)
SPECIFICATIONS
MAXIMUM CAPACITY (D
TOTAL WEIGHT 9,695 lbs.
TOTAL SHIPPING WEIGHT 9,850 lbs.
TILT HEI GHT 137-1/4"
OPERATING HEIGHT 114-1/2"
FULL TILT DEPTH 117-1/2"
OPERATING DEPTH 95"
WIDTH 122"
TILT LOAD (
TILT UNLOAD
UNLOADING HEIGHT FROM FLOOR 43-3/4"
LOADING HEIGHT FROM FLOOR 65-5/8"
DOOR OPENING 53-1/4" x 49"
BASKET DIAMETER 69-1/8"
BASKET DEPTH 80-5/16"
BASKET VO LUME 175 cu. ft.
MINIMUM LOAD SIZE 250 lbs.
MAXIMUM LOAD SIZE 460 lbs.
BURNER TYPE On/Off
HEAT INPUT* 2,800,000 btu/hr.
BLOWER MOTOR 25 HP
BASKET MOTORS (2
BURNER BLOWER MOTOR 1-1/2 HP
BLOWER MAXIMUM A IRFLOW 13,000 cfm
MAXIMUM DUCT BACK PRESSURE 1.25" (W.C.)
MINIMUM DUCT DIAMEMTER 24"
COMPRESSED AIR PRESSURE REQUIRED 80 psi (±10 psi)
COMPRESSED AIR VOLUME REQUIRED 20 cf/hr
COMPRESSED C ONNECTION 3/8" N.P.T.
Shaded areas are stated in metric equivalents
REAR TI LT
(FRONT TILT
RY WEIGHT
)15º
)15º
MOTORS
) (2) 5 HP
)460 lbs.
209.09 kg
4,397.65 kg
4,467.96 kg
348.6 cm
290.83 cm
298.45 cm
241.3 cm
309.88 cm
111.12 cm
166.69 cm
135.26 cm x 124.46 cm
175.58 cm
203.99 cm
4.96 cu. m
113.64 kg
209.09 kg
On/Off
705,290 kcal/hr
18.65 kw
(2) 3.73 kw
1.12 kw
368 cmm
3.1 mbar
60.96 cm
5.51 bar (±.7)
.57 cm/hr
-
* Gas pressure into the dryer cannot exceed 13" W.C. (water column). If the gas supply pressure is
higher than 13" W.C., an external regulator must be installed.
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
9
B. STEAM MODELS (ADS-464)
MAXIMUM CAPACITY (D
RY WEIGHT
) 460 lbs.
TOTAL WEIGHT 11,000 lbs.
TOTAL SHIPPING WEIGHT (
STRETCH WRAP/SKID
) 11,162 lbs.
TILT HEIGHT 137-1/4"
OPERATING HEIGHT 114-1/2"
FULL TILT DEPTH 117-1/2"
OPERATING DEPTH 95"
WIDTH 122"
TILT LOAD (
TILT UNLOA D (
REAR TILT
FRONT TILT
) 15º
) 15º
UNLOA DING HEIGHT FROM FLOOR 43-3/4"
LOA DING HEIGHT FROM FLOOR 65-5/8"
DOOR OPENING 53-1/4" x 49"
135.26 cm x 124.46 cm
BASKET DIAMETER 69-1/8"
BASKET DEPTH 80-5/16"
BASKET VOLUME 175 cu. ft.
MINIMUM LOAD SIZE 250 lbs.
MAXIMUM LOAD SIZE 460lbs.
BOILER HORSEPOWER 60 Bhp
STEAM INLET CONNECTION SIZE* 2-1/2" N.P.T.
STEAM RETURN CONNECTION SIZE (2
BASKET MOTORS (2
MOTORS
)
BLOWER MOTOR
PLACES
)1 1/4" N.P.T.
(2)
5
HP
25
HP
BLOWER MAXIMUM AIRFLOW 13,000 cfm
MAXIMUM DUCT BACK PRESSURE
1.25" (
W. C.
)
MINIMUM DUCT DIAMEMTER 24"
COMPRESSED AIR PRESSURE REQUIRED 80 psi (±10 psi)
COMPRESSED AIR VOLUME REQUIRED 20 cf/hr
COMPRESSED AIR CONNECTION 3/8" N.P.T.
Shaded areas are stated in metric equivalents
209.09 kg
4,949.6 kg
5,063.08 kg
348.6 cm
290.83 cm
298.45 cm
241.3 cm
309.88 cm
111.12 cm
166.69 cm
175.58 cm
203.99 cm
4.96 cu. m
113.64 kg
209.09 kg
-
-
(2)
3.73 kw
18.65 kw
368 cmm
3.1 mbar
60.96 cm
5.63 bar (±.7)
.57 cm/hr
-
* Size of piping to dryer varies with installation conditions. Contact factory for assistance.
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
10
C. ELECTRICAL SERVICE SPECIFICATIONS
1. Gas Models
ADG-464 (GAS)
E
LECTRICAL SERVICE SPECIFICATIONS (PER DRYER
IMPORTANT: 2 08 VAC and 240 VAC ARE NOT THE SAME. When o rdering, specify exact voltage.
)*
NOTES
Dryer Nameplate
* Conta ct factory for information not listed.
** Minimum wire size is #16 AWG Stranded Type Wire...for individual len gths less than 100 feet.
2. Steam Models
IMPORTANT: 2 08 VAC a nd 240 VAC ARE NOT THE SAME. When ordering, specify exact voltage.
A. Fuse ratings are dual-element, time-delay, current limiting, class RK1 or RK5 ONLY.
:
B. Circuit b rea kers are the rmal magnet ic (i ndustrial) type ONLY. For othe rs, cal cu late/ve r if y
correct breaker size according to appliance amp draw rating and type of breaker used.
C. Circuit br eak ers for 3Ø dry ers must be 3-pole type.
SERVICE
VOLTAGE
208 3ø 3/4 107 --- 150 150
240 3ø 3/4 101 98 150 150
380-400 3ø 3/4 --- 53 80 90
416 3ø 3/4 --- 51 60 90
460/480 3ø 3/4 51 --- 60 90
PHAS E
1ø --- 2 3.5 5
WIRE
SERVICE
D
EDICATED SPRINKLER SERVICE
ADS-464 (S
E
LECTRICAL SERVICE SPECIFICATIONS (PER DRYER
APPROX.
AMP DR AW
60 Hz 50 Hz
TEAM
Dual Eleme nt
**
FUSIN G
Tim e D e la y
)
CIRCUIT
BREAKER
)*
NOTES
Dryer Nameplate
* Contact factory fo r information n ot listed.
** Minimum wire size is #16 AWG Stranded Type Wire...for indivi dual lengths less than 100 feet.
B. Circuit breakers are thermal magnetic (industrial) type ONLY. For othe rs, cal cul ate/ver ify
correct breaker size according to appliance amp draw rating and type of breaker used.
C. Circuit breakers for 3Ø dryers mu st be 3-pole type.
SERVICE
VOLTAGE
200 3ø 3 117 --- 150 150
208 3ø 3/4 102 --- 150 150
240 3ø 3/4 96 94 125 150
380-400 3ø 3/4 --- 51 60 90
416 3ø 3/4 --- 51 60 90
460/480 3ø 3/4 49 --- 60 90
PHASE
1ø --- 2 3.5 5
WIR E
SERVICE
D
EDICATED SPRINKLER SERVICE
APPROX.
AMP DRAW
60 Hz 50 Hz
Dual Element
**
FUSING
Time D e la y
BREAKER
CIRCUIT
A. Fuse ratings are dual-element, time-delay, current limiting, class RK1 or RK5 ONLY.
:
NOTE: ADC reserves the right to make changes in specifications at any time, without notice or
obligation.
11
SECTION IV
INSTALLATION REQUIREMENTS
Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, installation must conform to applicable AMERICAN NATIONAL STANDARDS:
National Fuel Gas Code ANSI Z223.1-LATEST EDITION
and/or
National Electric Code ANSI/NFPA No. 70-LATEST EDITION
A. ENCLOSURE / AIR SUPPLY / EXHAUST REQUIREMENTS
NOTE: The following information is very brief and general. For detailed descriptions, refer to the
ADG-464 Installation/Operator's Manual (ADC Part No. 112193) for Gas Model dryers and
ADS-464 Installation/Operator's Manual (ADC Part No. 112103) for Steam Model dryers.
Bulkheads and partitions around the dryer should be made of noncombustible materials. Allowances
should be made for the opening and closing of the control door and lint door. Also, allowances should be
made in the rear for ease of maintenance. Refer to the
Part No. 112193) for Gas Model dryers and ADS-464 Installation/Operator's Manual (ADC Part No. 112103)
for Steam Model dryers for recommended distances and minimum allowances required.
ADG-464 Installation/Operator's Manual (ADC
When the dryer is operating, it draws in room air, heats it, passes this air through the basket (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
burner air switch "fluttering" problems on gas dryers may result, and you also could have premature motor failure
from overheating. The air supply must be given careful consideration to insure proper performance of each
dryer.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning fumes. Make-up
air that is contaminated by dry cleaning fumes will result in irreparable damage to
motors and other dryer components.
Exhaust duct work should be designed and installed by a competent technician. Improperly sized duct work will
create excessive back pressure which will result in slow drying, increased use of energy, and shutdown of the
burner by the lint burner switch, over-burner hi-limit or exhaust limit. Refer to the ADG-464 Installation/Operator's
Manual (ADC Part No. 112193) for Gas Model dryers and ADS-464 Installation/Operator's Manual (ADC Part
No. 112103) for Steam Model dryers for more detail.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCT WORK CAN
CREATE A POTENTIAL FIRE HAZARD.
12
B. ELECTRICAL REQUIREMENTS and GAS 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,
the applicable requirements of the National Electric Code ANSI/NFPA No. 70-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.
The dryer installation must meet the AMERICAN NATIONAL STANDARD; National Fuel Gas Code ANSI
Z223.1-LATEST EDITION, as well as, local codes and ordinances, and must be done by a qualified technician.
NOTE: Undersized gas piping will result in ignition problems and slow drying and can create a safety
hazard.
The dryer must be connected to the type of gas (natural or L.P.) indicated on the dryer data label. If this
information does not agree with the type of gas available, contact the distributor who sold the dryer or contact the
factory.
ALL electrical connections, material, and workmanship must conform to
C. OPERATIONAL SERVICE CHECK PROCEDURE
After performing any service or maintenance function, an operational check should be performed to insure that
ALL components are performing properly.
1. Make a complete operational check of ALL the operating controls to insure that the timing is correct,
temperature selection switches are functioning properly.
2. Make a complete operational check of ALL safety related circuits, door switches, hi-limit thermostat, air
pressure switches, RTD (Resistive Temperature Device) probes, etc.
13
SECTION V
COMPONENT DESCRIPTION/REPLACEMENT
A. TUMBLER SUPPORT and DRIVE SYSTEM
IMPORTANT: Always keep the tumbler (basket) section of the dryer in an upright position when
moving it.
1. Tumbler
The tumbler is made of five (5) 14 gauge stainless steel perforated panels, five (5) stainless steel lifting ribs,
and two (2) outer tumbler rings. The tumbler is a completely welded assembly so the perforated panels
not removable.
2. Tumbler Support System
The tumbler sits on four (4) 11-inch diameter heavy-duty rubber roller wheels which supports and drives the
tumbler. The rubber wheels are molded into each of four (4) steel hubs. The steel hubs are flattened to the
2-inch diameter drive shafts by taper lock bushings. Each drive shaft is supported by two (2) 2-inch diameter
heavy duty roller bearings. The position of the tumbler is adjusted by moving these bearings in or out with the
four (4) bearings adjustment bolts.
are
14
3. Tumbler and Basket Drive System
There are two (2) 5 HP tumbler drive motors. Each motor drives one of the 2-inch diameter tumbler drive
shafts, and the motors spin simultaneously so that ALL four (4) sets drive wheels work together to spin the
tumbler.
Each motor is connected to the drive shaft by two (2) “A” section V-belts, driving a shaft-mounted (5.6 to
ratio) gear reducer. This produces a tumbler shaft speed of 200 RPM to 205 RPM and a tumbler speed of
31.5 RPM. Proper tension is maintained on the V-belts by tightening the gear reducer turnbuckle support.
The oil in each gear reducer must be replaced every six (6) months by 1.4 liters of I.S.O. viscosity Grade
460 gear oil.
Servicing the Drive System
4.
a. Removing a Drive Wheel
The drive wheels are removed through the front and back panels of the dryer, not through the sides. The
front loading door and back loading door panels are hinged at the top. Remove the bolts holding these
panels to tumbler section frame and swing the panel out. The two (2) 1/4-inch poly-flo tubes connected to
the load door piston have to be removed to allow the panel to swing up far enough out to get access to the
drive wheels. Likewise, the following electrical disconnections must be performed (refer to page 32).
15
B. MAIN AIR BLOWER/HEAT RECLAIMER SYSTEM
The fan which moves the exhaust air through the dryer is a 22-inch diameter, squirrel cage fan that is driven at
1,100 rpm by a 25 HP motor. This fan moves a maximum of 13,000 cfm air through the dryer.
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The dryer is equipped with a pneumatically operated heat reclaimer damper, which when opened, will recirculate
approximately fifteen percent (15%) of the dryer’s exhaust air.
The heat reclaimer dampener is closed until ignition of flame has been established. Then, the damper piston is
actuated, opening the damper and recirculating fifteen percent (15%) of the exhaust air back over the gas burner
and into the tumbler. The damper remains open for the rest of the drying cycle. On cool down, the damper
closes, exhausting
ALL of the 13,000 cfm which ensures a fast cool down of the load.
NOTE: Gas Dryers must have a "Y"
dimension of 1-3/16".
HEAT RECLAIMER ADJUSTMENT
1. REMOVE ELECTRICITY FROM THE UNIT.
2. LOOSEN HEAT RECLAIMER ADJUSTMENT NUTS
ON ALL FOUR (4) CORNERS OF THE HEAT
RECLAIMER PISTON.
3. ADJUST THE BOTTOM HEAT RECLAIMER NUTS
DOWN TO THEIR DESIRED POSITION WHICH
WILL GIVE THE PROPER PISTON STROKE.
EXAMPLE: IF THE DESIRED PISTON STROKE IS
4. TIGHTEN TOP HEAT RECLAIMER NUTS DOWN
ONTO THE BOTTOM HEAT RECLAIMER NUTS.
H
EAT RECLAIMER SETTINGS
Z = 1-5/8
Y+Z=X Y %HR Inches Rec lai med
1-1/8" 1/2" 7.46 1-1/4"
2-5/8" 1" 15.67 2-5/8"
3-1/8" 1-1/2" 25.37 4-1/4"
3-5/8" 2" 34.32 5-3/4"
4-1/8" 2-1/2" 43.28 7-1/4"
4-5/8" 3" 50.74 8-1/2"
5-1/8" 3-1/2" 58.95 9-7/8"
TWO (2) INCHES (5.1 CM), THAN THE
DISTANCE "X" IN THE ILLUSTRATION
MUST BE TWO (2) INCHES (5.1 CM).
FULL OP EN 16- 3/4"
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C. COMPRESSED AIR SYSTEM
The compressed air system of the dryer consists of a number of pneumatic pistons located throughout the dryer,
an FRL (Filter/Regulator/Lubricator) assembly, and pneumatic control panel.
1.
Air Pistons
The pistons are actuated by solenoid and flow control valves that are under computer control. The pneumatic
pistons are used to:
• Tilt the dryer for loading and unloading.
• Open and close load and unload doors
• Operate heat reclaimer.
• Operate the cool down damper and the intake air damper.
2. Filter and Regulator Assembly
The purpose of the filter is to remove bulk liquids and solid particles from the compressed air stream. The
filter element provides mechanical separation of solids. Centrifugal force inside the filter bowl separates bulk
liquids and larger solid particles.
The filter consists of a louver which causes a
centrifugal spinning action to separate contaminants.
A filter which mechanically separates contaminants
is also present. The filter bowl collects the
contaminants and a baffle prevents turbulence from
picking up contaminants at the bottom of the bowl
and returning them to the air stream.
a. Filter Maintenance
1) To remove filter element ...
Twist the filter bowl 1/8 turn clockwise (CW). Then pull
the bowl down to expose the filter element. To remove
the filter element, unscrew the baffle (this will allow
element removal).
2) To clean filter element ...
The filter element can be cleaned with soap and water.
FILTER / REGULATOR
NOTE: When replacing the filter element bowl care must be taken to ensure that the O-ring does not
get pinched.
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b. Regulator Operation
The adjustment knob simply acts upon a spring rest located on the spring and directly compresses the
spring as it is adjusted. A non-rising low torque adjustment screw is used on this type of filter and regulator.
The upper spring rest is located on top of the regulator spring and transmits force from the adjustment
screw to the spring. Regulators use simple wire coil springs for controlling the downstream regulator
pressure. The bonnet houses the adjustment spring and is used to help retain the diaphragm. The diaphragm
moves up when the downstream pressure reaches its preset pressure level, which in turn closes the valve.
A self-relieving regulator is designed to automatically relieve overpressure in the secondary side of the
regulator.
NOTE: THIS SELF-RELIEVING FEATURE IS NOT DESIGNED TO BLEED THE DOWN-
STREAM PRESSURE
Dryer must be provided with a clean, dry, regulated 80 PSI (+/- 10 PSI) air supply (equivalent
volume - 20 cf/hr).
The regulator should be set at 80 PSI (+/- 10 PSI). To set pressure, pull the adjusting knob up and either
turn the knob clockwise (CW) to increase the pressure or counterclockwise (CCW) to decrease the
pressure.
3.
Pneumatic Control Panel
.
The pneumatic control panel of a 2-way tilt dryer has two (2) tilting solenoid valves, one to control the front
set of tilting pistons and a second to control the rear set of tilting pistons. A 1-way tilt dryer has only one (1)
tilting solenoid valve.
Each valve has five (5) 1/2-inch F.P.T. ports and two (2) electric solenoids, one on each side of the valve.
19
To tilt the dryer back, a 120 volt signal is applied to the front pistons solenoid connector #S5, and no voltage
is applied to the solenoid connector #S8. The internal spool in the valve will move and 80 PSI of air will enter
the bottom port of the front tilting pistons, extending the front tilting piston rods and tilting the dryer back for
loading. The top piston ports are bled to the atmosphere. To level the dryer after loading, the voltage signals
are reversed. No voltage is applied to the “S5” solenoid, and 120 volts are applied to the “S8” solenoid. The
valve spool will now move so that 80 PSI of air is applied at the top piston ports, while the bottom piston ports
are bled to the atmosphere. The piston rods will now retract, leveling the dryer. On a 2-way tilt dryer, the
rear tilting piston solenoid valve acts in the same manner.
The tilting piston valves are three (3) position valves. This means that, if no voltage is applied to both positions
(“S5” and “S8”) ALL five (5) valve ports are blocked. If the dryer is tilting or leveling and power to the dryer
is shut off, the pistons will lock in position, holding the dryer in a partially tilted position.
The dryer can be made to tilt faster or slower by adjusting the pistons 3/8-inch flow control valves which are
located on the pneumatic control panel.
4.
Internal and External Pilot Air Supply
On 2-way tilt dryers, a pneumatic safety circuit is incorporated to prevent both front and rear tilting pistons
from extending their rods at the same time. When 120 volts is supplied to the “S5” side of the front tilting
piston solenoid valve coil, the round internal spool in the core of the solenoid will move, allowing 80 PSI air to
flow into the bottom ports of the front tilting pistons, while the top ports of these pistons are bled to the
atmosphere. In addition to this 120 volt electrical signal, the spool also requires a 30 PSI supply of
compressed air to change its position. This pilot air can either be supplied internally, tapped off the 80 PSI air
supply connected to port no. 1 through holes in the body of the solenoid valve or it can be supplied externally
through the 1/8-inch F.P.T. connection located on either end of the solenoid valve. If no pilot air is supplied to
the solenoid valve then the spool cannot move, even with voltage supplied to the solenoid valve coil.
This can be used to prevent both sets of tilting pistons from extending their rods at the same time. When the
front tilting piston rods are extended, 80 PSI air is connected to the bottom piston ports, while the top piston
ports are bled to the atmosphere. So, by tapping the external pilot air supply to the rear tilting rods are
extended, then there is no pilot pressure available to the rear tilting piston solenoid valve so that its spool
cannot move and the rear tilting piston rods cannot extend if a 120 volt signal is sent to its “12” side solenoid
valve coil.
The external pilot air supply to the front tilting piston is tapped off the rear tilting piston top port air line so that
whenever the rear piston rods are extended, there is no pilot air supplied to the front tilting piston solenoid
valve and the front tilting piston rods cannot extend. On the solenoid valve supplied on the dryer, the #12 side
valve is externally piloted, while #14 side valve is internally piloted.
A valve can easily be checked for internal or external piloting by removing the two (2) screws which hold the
solenoid operator onto the valve. For an internal pilot air to be supplied to the valve spool. For an external
pilot, the solid sealing disc must be positioned on top of the internal port.
5. Loading Doors and Heat Reclaimer, Cool Down and Intake Air Damper
These solenoid valves are located in the 4-station manifold block on the pneumatic control panel. The front
load door piston, rear unload door piston (optional), and the sprinkler water valve are ALL controlled by their
own 3-way double acting solenoid valve.
The three (3) pistons that control the heat reclaimer damper, cool down damper, and intake air damper are
controlled by a single 3-way double acting solenoid valve.
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To open the front loading door, a 120 volt signal is applied to S1, the coil of the valve that supplies air to the
load door or the heat reclaimer’s bottom port. The valve will open, and 80 PSI of air is supplied to the bottom
port of the piston. The piston rod will extend, and the door will open. No voltage is applied to S2, the coil of
the valve that controls the air supply to the door pistons top port so that this line is bled to the atmosphere.
To close the front loading door or heat reclaimer damper, the voltage signals are reversed, and the loading
door will close.
21
D. SAFETY DEVICES
The dryer is equipped with numerous safety devices to ensure that the dryer operates safely. The chart on the
following page (
tripping.
page 23) lists each device with its location, function, computer display message, and result of
22
Safety Devices Locations/Functions/Messages
1.
S
AFETY DEVICES
L
OCATION
F
UNCTION
C
OMPUTER
D
ISPLAY MESSAGE
R
ESULT OF
T
RIPP ING
Load Door Switch
Unload door switch (Two
door unit only)
Tilting Switches
Drum Rotation Sensor
Lint Chamber air pressure
switch
Burner Fan Air Flow
Switch
(Gas Dryers Only)
Hi/Lo Gas Pressure
Switch
(Gas Dryers Only)
Heat Reclaimer Damper
Switch
Heat Console Door
Access Door Switch
Exhaust Air Temp Control
Sensor
Left side of
Load door
Right side of
unload door
Top left side of
base module
Left side of
tumbler section
Rear of base
module
Center of heat
console
Lower left of
heat console
section
Right side of
heat console
Inside heat
console
Inside burner
section duct
Ensure s drye r load doors
are closed
Ensures dryer unl oad
doors are closed
"DOOR OPEN" Dryer will not run
"DOOR OPEN" D
Ensu res dryer is l evel " LEVE L FAULT" D
Ensures tumbler is
rotating
Ensures proper air fl ow
through dryer
"DRUM FAULT" S
"AI RFLOW FAULT" S
Ensures proper
combustion air flow into
"HE ATER FAULT" S
the burn er box
Ensures proper gas
supply pressure for
adequate ignition
Ensures that the heat
reclaime r is either
opened or closed
Ensures th at access doors
are closed
Moni tors tumbl er exhaust
air temp
"GAS SUPPLY
FA UL T"
Input L.E.D. #13 of
the PLC is off
"DOOR OPEN" D
"EXHAUST DSFL" S
RYER WILL NOT RUN
RYER WILL NOT RUN
TOPS HEAT ONLY
TOPS HEAT ONLY
TOPS HEAT ONLY
S
TOPS HEAT ONLY
N
ONE
RYER WILL NOT RUN
TOPS HEAT ONLY
Exhaust Air Hi Temp
Control Sensor
Intake Air Temp Control
Sensor (opt ional)
Intake Air Temp Control
Sensor
Burner Hi-Limit Safety
Sensor
Sprinkler Control Safety
Sensor
Lint Drawer Switches
Inside exhaust
duct
Top right of
tumbler section
Top right of
tumbler section
Top of burner
section
Top right of
tumbler section
Above lint
drawer handles
Moni tors tumbl er exhaust
and air temp
Moni tors tumbler air
intake temp
Moni tors tumbler air
intake temp
Monitors air temp above
the burn er box
Open sprinkler system
water valve on hi-temp
condi tion
Disables machine when
draw ers ar e open or if
drawers have not been
clea ned in last five load
"HI -TEMP FAULT" S
"INTAKE DSFL" S
"HI -TEMP FAULT" S
"HI -TEMP FAULT" S
Orange sprinkler
pilo t li ght comes on.
Alarm h orn sou nds.
Lint Drawer D
TOPS HEAT ONLY
TOPS HEAT ONLY
TOPS HEAT ONLY
TOPS HEAT ONLY
O
PENS THE SPINKLER
W
ATER VALVE
P
OWER DOWN THE
AND
W
HOLE DRYER
RYER WILL NOT RUN
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E. BLOWER (Squirrel Cage Fan) MOTOR ASSEMBLY
1. Blower (Squirrel Cage Fan) Motor Description
The dryer uses a 22-1/4 inch diameter blower (squirrel cage fan). It rotates (spins) in a counterclockwise
(CCW) direction, when viewed at the blower motor.
The blower shaft is mounted on two (2) 1-3/4 inch diameter pillow block bearings and is driven by two (2) BX
type V-belts which are connected to a 25 HP blower motor.
The blower motor is mounted
on a adjustable base. The
motors position can be easily
adjusted so that the proper
tension can be maintained on
the V-belts.
2.
Blower (Squirrel Cage Fan) Motor Component Replacement
a. Blower Motor Replacement
1) Discontinue electrical service to the dryer.
2) Remove the belt guard.
3) Mark and identify the wires that will be disconnected for proper reinstallation.
4) Loosen the bolts securing the blower motor to the motor base;
a) Slide the blower motor forward.
b) Remove the V-belts.
c) Remove the loosened bolts.
d) Remove the blower motor being replaced from the dryer.
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5) Remove the bolts from the bushing.
6) Insert the bolts into the threaded holes.
7) Tighten the bolts evenly for motor pulley removal.
8) Mark the inside of the motors' shaft before removing the bushing.
PULLEY REMOVAL
9) Loosen the set screws in the bushing.
MAN3286
10) Remove the bushing.
11) Measure the mark on the motors' shaft (from Step #8) to the end of the shaft and mark the new
motors' shaft.
12) Install new blower on to the motor base.
13) Slide the motor pulley on to the new blower motors' shaft.
14) Slide the bushing onto the shaft until the inside of the bushing meets the mark (from Step #11) on the
new motors' shaft.
PULLEY INSTALLATION
15) Tighten/secure the set screws into the bushing.
16) Insert the bolts into the large holes on the bushing and thread them into
the motor pulley.
17) Tighten the bolts evenly for motor pulley installation.
MAN3286
18) Align the pulleys.
19) Tighten (hand tight only) the bolts for the new motor to the motor base.
Leave enough movement for V-belt adjustment.
20) Replace the V-belts...
a) Adjust to proper tension by adjusting the position of the new blower motor.
b) Align the V-belts.
21) Tighten/secure the new motor to the motor base.
22) Reconnect the wires onto the new motor that were marked and disconnected in Step #3.
A wiring diagram is usually affixed to the side of the motor.
23) Reinstall the belt guard removed in Step #2.
24) Reestablish electrical service to the dryer.
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