American Dryer Corp ADS-464 User Manual

ADS-464

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.

Do not store or use gasoline or other flammable
vapor and liquids in the vicinity of this or any
other appliance.

AVERTISSEMENT: Assurez-vous de bien
suivre les instructions données dans cette
notice pour réduire au minimum le risque
d’incendie ou d’explosion ou pour éviter tout
dommage matériel, toute blessure ou la mort.

Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables dans
le voisinage de cet appareil ou de tout autre
appareil.

010496
011899DX/mt

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: [phone] / Fax: [phone]

e-mail: [e-mail]

ADC Part No. 112103

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)

ADS-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 [phone] or telephone your orders directly to the ADC Parts Department at
[phone]. 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

YOU MUST DISCONNECT and LOCKOUT THE ELECTRIC SUPPLY and 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 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 Precaution ......................................................................................................................... 4

SECTION II

SPECIFICATIONS/DIMENSIONS................................................................................................... 6

A. Specification ............................................................................................................................... 6

B. Dimensions ................................................................................................................................. 7

SECTION III

INSTALLATION PROCEDURES ..................................................................................................... 8

A. Reassembly of Dryer................................................................................................................... 8

B. Location Requirements ...............................................................................................................11

C. Internal Air, Electrical, and Water Connections ........................................................................... 12

D. External Supply Connections ..................................................................................................... 18

E. Electrical Requirements ............................................................................................................. 22

F. Fresh Air Supply Requirements ................................................................................................. 25

G. Steam Information ..................................................................................................................... 26

H. Shut Down Instructions ............................................................................................................. 27

SECTION IV

PRE START-UP................................................................................................................................. 28

A. Preparation for Operation .......................................................................................................... 28

SECTION V

ROUTINE MAINTENANCE........................................................................................................... 29

A. Cleaning ................................................................................................................................... 29

SECTION VI

COMPONENT SYSTEM DESCRIPTIONS................................................................................... 31

A. Tumbler Support and Drive System ........................................................................................... 31

B. Main Air Blower and Heat Reclaimer System............................................................................. 34

C. Compressed Air System............................................................................................................ 36

D. Safety Devices .......................................................................................................................... 39

SECTION VIII

SERVICE/PARTS INFORMATION................................................................................................ 41

A. Service ...................................................................................................................................... 41

B. Parts .......................................................................................................................................... 41

SECTION VIII

WARRANTY INFORMATION ....................................................................................................... 42

A. Returning Warranty Cards ......................................................................................................... 42

B. Warranty................................................................................................................................... 42

C. Returning Warranty Parts .......................................................................................................... 42

SECTION IX

TROUBLESHOOTING.................................................................................................................... 44

Troubleshooting TOC ..................................................................................................................... 44

A. Power Malfunctions .................................................................................................................. 45

B. Tumbler (Basket) Electrical Malfunctions ................................................................................... 56

C. Base Section Electrical Malfunctions .......................................................................................... 64

D. Pendent Control Malfunctions ................................................................................................... 68

E. Temperature Sensing ................................................................................................................. 71

F. Motors ..................................................................................................................................... 74

G. PLC (Programmable Logic Controller) Messages ..................................................................... 76

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 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 or 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 [phone].

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. Dryers must be exhausted to the outdoors.

3. 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.

WARNING : DO NOT use heat for drying articles that contain plastic, foam, sponge rubber or similarly

textured rubber materials. Drying in a heated basket (tumbler) may damage plastics or
rubber and also may be a fire hazard.

4. A program should be established for the inspection and cleaning of lint in the burner area, exhaust duct

work, and inside the dryer. The frequency if 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.

5. For personal safety, the dryer must be electrically grounded in accordance with local codes and/or the

NATIONAL ELECTRIC CODE ANSI/NFPA NO. 70-LATEST EDITION, or in Canada, the CANADIAN
ELECTRICAL CODES PARTS 1 & 2 CSA C22.1-1990 or LATEST EDITION.

NOTE: Failure to do so will VOID THE WARRANTY.

6. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switches, heat safety

circuit, or tilt switches ever be disable.

WARNING: PERSONAL INJURY or FIRE COULD RESULT.

4

7. This dryer is not to be used in the presence of dry cleaning solvents or fumes.

8. Remove articles from the dryer as soon as the dryer cycle has been completed.

WARNING : Articles left in the dryer after the drying and cooling cycles have been completed can

create a fire hazard.

9. READ and FOLLOW ALL CAUTION and DIRECTION LABELS ATTACHED TO THE DRYER.

WARNING: YOU MUST DISCONNECT and LOCKOUT THE ELECTRICAL SUPPLY and

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 lightening flash with an arrow head within an
equilateral triangle, is intended to alert the user to the
presence of non-insulated “dangerous voltage” within
the products enclosure that may be sufficient in
magnitude to constitute a risk of electrical shock to
any person.

The Exclamation point “!” within an equilateral triangle
is intended to alert the user to the presence of
important operating and maintenance (servicing)
instructions in the literature accompanying the
appliance.

5

SECTION II

SPECIFICATIONS/DIMENSIONS

A. SPECIFICATIONS

MAXIMUM CAPACITY (DRY WE IGHT) 460 lbs. 208.66 kg
Total Weight 10,500 lbs. 4,762.7 kg
Total Shipping Weight 10,800 lbs. 4,898.8 kg
Tilt Height 137-1/4" 348.6 cm
Operating Height 114-1/2" 290.83 cm
Full Tilt Depth 117-1/2" 298.45 cm
Operating Depth 95" 241.3 cm
Width 122" 309.88 cm
Tilt Load (REAR TILT ) 15º
Tilt Unload (FRONT T ILT) 15º
Loading Height from Floor 65-5/8" 166.69 cm
Tumbler (BASKET) Diameter 69-1/8" 175.58 cm
Tumbler (BAS KE T) Depth 80-5/16" 203.99 cm
Tumbler (BAS KE T) Volume 175 cu. ft. 4.96 cu. m
Minimum Load Size 250 lbs. 113.4 kg
Maximum Load Size 460 lbs. 208.66 kg
Blower Motor 25 HP 18.64 kw
Tumbler (BASKET) Motors (2 MOTO RS) (2) 5 HP (2) 3.73 kw
Boiler Horsepower 60 Bhp
Steam Inlet Size Connection 2-1/2" N.P.T. --­ Burner Blower Motor 1-1/2 HP 1.12 kw
Blower Maximum Airflow 13,000 cfm 368 cmm
Maximum Duct Back Pressure 1.25" W.C. 3.1 mbar
Minimum Duct Diamemter 24" 60.96 cm
Compressed Air Pressure Required 80 psi (±10 psi) 551.6 kpa (±68.95 kpa)
Compressed Air Volume Required 20 cf/hr .57 cm/hr
Compressed Connection 3/8" N.P.T. ---

Shaded areas are stated in metric equivalents

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or

obligation.

6

B. DIMENSIONS

NOTE: ADC reserves the right to make changes in specifications at any time, without notice or

obligation.

7

SECTION III

INSTALLATION PROCEDURES

Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installation must conform to applicable NATIONAL ELECTRIC CODE ANSI/
NFPA NO. 70-LATEST EDITION, or in Canada, the CANADIAN ELECTRICAL CODES PARTS 1 & 2

CSA C22.1-1990 or LATEST EDITION.

A. REASSEMBLY OF DRYER

IMPORTANT : Always keep the tumbler (basket) section of the dryer in an upright position when

moving it.

1. Reassembly Instructions for Dryer Shipped in Two (2) Pieces

In this method of shipment, the tumbler section and the tumbler base section are shipped as one unit and the
heat console section is the second.

a. Reassemble Tumbler (Basket) and Tumbler (Basket) Base Section To The Heat Console Section

Move both pieces into position by lifting them with cables through the eyebolts located at the top of each
of the two sections. These pieces may also be moved into place with a fork (lift) truck by lifting the pieces
from underneath. The tumbler and tumbler base section weighs about 6,400 pounds (2,903 kg) and the
heat console section weighs about 4,100 pounds (1,860 kg). Once the sections are in position, the seven
(7) clearance holes on the tumbler (basket) base section (four [4] in the front and three [3] in the rear)
must be aligned with the seven (7) #3/8-16 tapped holes in the heat console section. Use the three (3)
#8-16 x 2” long bolts along with the tapered shims supplied to bolt the two sections together.

b. Reattach The Control Pendant Arm

Position the control pendant arm to the top front of the heat console section by aligning the clearance holes
in the arm with the 1/4-20 tapped holes on the top of the heat console section. Use the 1/4-20 x 3” long
bolts supplied with the machine to attach the arm to the console.

c. Reconnect The Internal Air, Electric Connections, and Water Connections (refer to page 12 through

page 18).

8

2. Reassembly Instructions For Dryers Shipped In Three (3) Pieces

When the dryer is shipped in three (3) pieces, the tumbler and the tumbler base sections are shipped as
two (2) separate pieces. The heat console section is shipped as the third piece.

a. Reassemble The Tumbler (Basket) Base Section To The Heat Console Section

Move the heat console section into position by using cables through the eye bolts located at the top of the
section or by using a fork truck and lifting the section from underneath. The tumbler (basket) base section
is now moved into position with a fork (lift) truck. The seven (7) clearance holes located on the right side
of the tumbler (basket) base section (four [4] holes in front and three [3] at the back of the section) must
be aligned with the seven (7) 3/8-16 tapped holes on the left side of the heat console section. Use the
3/8-16 x 3” long bolts and the tapered shims supplied with the unit to bolt the section together.

b. Reassemble The Tumbler (Basket) Section Over The Tumbler (Basket) Base

Slowly lower the tumbler (basket) section over the tumbler base. The four (4) large slots located on the
bottom of the tumbler (basket) section (one slot at each corner of the tumbler [basket] section) must be
aligned with the top of the pistons in the tumbler base section. Use the four (4) 1-1/4-12 x 3-1/2” long
bolts supplied with the unit to secure the tumbler (basket) section to the tumbler (basket) base section.

c. Reattach The Control Pendant Arm

Position the control pendant arm to the top front of the heat console section by aligning the clearance
holes in the arm with the 1/4-20 tapped holes on the top of the heat console section. Use the 1/4-20 x 3”
long bolts supplied with the machine to attach the arm to the console.

d. Reconnect The Internal Air, Electric Connections, and Water Connections (refer to page 12 through

page 18).

3. Reassembly Instructions for Dryer Shipped in Four Pieces

In this method of shipment the tumbler section, tumbler (basket) base, lower heat console, and upper heat
console are ALL shipped as separate sections.

a. Reassemble The Heat Console Section

Apply silicone (provided with unit) to the flanges of the lower heat console section. Lift the upper heat
console section by use of cables through the eyebolts located on the top of the upper console section.
Position the upper heat console over the lower heat console section. Use the 5/16-18 hardware provided
with the machine to secure the sections together.

b. Reassemble The Tumbler (basket) Base Section To The Heat Console Section

Move the heat console section into position by using cables through the eyebolts located at the top of the
section or by using a fork (lift) truck and lifting the section from underneath. The tumbler (basket) base
section is now moved into position with a fork (lift) truck. The seven (7) clearance holes located on the
right side of the tumbler (basket) base section (four [4] holes in the front and the three [3] at the back of
the section) must be aligned with the seven 3/8-16 tapped holes on the left side of the heat console
section. Use the 3/8-16 x 2” long bolts and the tapered shims supplied with the unit to bolt the sections
together.

9

c. Reassemble The Tumbler (Basket) Section To The Tumbler (Basket) Base

Lift the tumbler (basket) section with a cable through the eye bolts on top of the section. Slowly lower
the tumbler (basket) section over the tumbler base. The four (4) large slots located on the bottom of the
tumbler (basket) section (one slot at each corner of the tumbler section) must be aligned with the tapped
holes in the cylinder cleaves located at the top of the tumbler (basket) section. Use the four (4)
1-1/4-12 x 3-1/2” long bolts supplied with the unit to secure the tumbler (basket) section to the tumbler
(basket) base section.

d. Reattach The Control Pendant Arm

Position the control pendant arm on the top front of the heat console section by aligning the clearance
holes in the arm over the 1/4-20 taped holes in the top of the heat console section. Use the 1/4-20 x 3”
long bolts supplied with the unit to attach the arm to the console.

e. Reconnect The Internal Air, Electric Connections, and Water Connections (refer to page 12 through

page 19).

10

B. LOCATION REQUIREMENTS

The model ADS-464 dryer requires 36-inches of space on each side of the dryer and 36-inches of space behind
the unit for ease of maintenance and tilting. The dryer must be leveled for proper operation. If shimming is
required, put 9-1/2” x 9-1/2” metal shims under the base feet. The dryer must be lagged to the floor.

IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be necessary.

11

C. INTERNAL AIR, ELECTRICAL and WATER CONNECTIONS

1. Air

a. Front Tilt Piston and Sprinkler lines

This connection is made at the front of the dryer in the area between the lower heat console section and
the tumbler (basket) base section. To connect the sprinkler air line insert the 1/4” aluminum tubing into the
1/4” brass compression fitting and tighten the fitting nut. To connect the 3/8” poly-flo tubing to the
corresponding brass fittings, match the marked number on the tube with the number on the brass fitting.
After inserting the corresponding tubes into the brass fittings. Tighten the brass fitting nuts.

b. Rear Tilt Piston Lines

This connection is made at the rear of the dryer in the space between the lower heat console section and
the tumbler (basket) base section. Insert the 3/8” poly-flo tube coming from the tumbler (basket) base
section to the 3/8” brass fitting marked with the corresponding number. Do the same to the second tube
and brass fitting. Tighten the brass fitting nuts.

12

c. Load Door Piston Air Lines and Cool Down Damper Piston Air Lines

The load door cylinder pneumatic connections are made in the lower heat console section, in the area
behind the pneumatic panel. To connect the 1/4” poly-flo lines into the corresponding needle valves,
match the number on the line with the number on the needle valve. Insert ALL of the air lines to make
sure that the connections are complete. Repeat this process for the two (2) cool down piston air lines.

13

2. Electric

a. Tumbler (Basket) Motors

The disconnects for the two (2) tumbler (basket) motors are located in the lower heat console. The right
drum (tumbler/basket) motor disconnect is located in the lower heat console on the upper shelf towards
the left. The left drum (tumbler/basket) motor disconnect is located in the base of the lower heat console
to the right. On both cables the mechanical connections should be made to the respective junction box.
Remove the two (2) screws that hold down the cover of each junction box. Insert cable end in the junction
box and fasten with lock nut. Then begin to connect the four (4) wires with the same color tape identifiers
together with the four (4) wires already in the junction box. Make these connections with wire nuts and
PVC electrical tape. Replace the cover and the cover (2) screws that hold down the cover to the junction
box.

b. Temperature Probe, Base, and Tumbler (Basket) Disconnects

The disconnects are located in the lower heat console. The temperature probe disconnect is located on
the upper shelf towards the left. The base disconnect and the tumbler (basket) disconnect are located on
the base towards the right. Check identifying tapes to ensure proper assignments of connectors to the
proper base. Check for proper keying and connect disconnect to the proper base. Engage hold downs on
base and verify that the clamps are properly locked.

14

c. Annunciator, Pendent, Over-Burner, and RTD (Resistive Temperature Device) Cable

Remove the four (4) bolts that hold on the character (464) panel. Open the door to the main electrical
enclosure, the female end of the RTD (Resistance Temperature Device) cable will be found there. Loosen
the 1-inch lock nut and remove the modified hole seal. Put the female end of the RTD cable through the
hole in the top of the electrical enclosure. Connect the male end and the female end of the RTD cable
together, pull the cable up until the threads of the reducing bushing can be seen through the hole into where
the character (464) panel was. Next, get the 1-inch lock nut on by a few threads, slip the modified hole
seal under the lock nut holding the 45° cord grip connector, then tighten the 1-inch lock nut. Replace the
character (464) panel and tighten the four (4) bolts.

15

d. Pendent

On the top of the heat console section of the dryer near the pendent, there is a junction box with four (4)
cables coming out of it. Two (2) of the cables from the junction box have connectors on the end, a 5-pin
connector and an 11-pin connector. Coming out of the pendent should be two (2) cables, one with a
5-pin connector and the other with an 11-pin connector. Match up the four (4) cables into assigned pairs,
check keying and connect the male and female connection together.

16

e. Tumbler Junction Box Disconnect

Remove the four (4) bolts that hold on the lower left side panel, then remove the panel. The safety panel
is next to be removed. This is done by removing the six (6) bolts on the bottom of the safety panel where
the tumbler section and the base meet. Reach into the feed through hole in the base of the tumbler section,
there will be two (2) cables there. Pull both cables through the hole into the tumbler section. The cable
Leave that cable in the tumbler section (it will be covered in Section f below [Left Drum Motor]). Check
keying between the plug and tumbler junction box. Insert plug into connector on the junction box and
engage locking clasps. Leave the lower left side panel and the safety panel off the machine until left drum
motor is reconnected (refer to Section f below [Left Drum Motor]).

f. Left Drum Motor

There are two (2) different ways that the left drum motor is connected with or without the motor
disconnected junction box. The junction box is used when the connections to the left motor are made on
the back side of the motor, nearest to the tumbler basket. When connecting the motor, bring the left drum
motor cable (refer to Section e above [Tumbler Junction Box Disconnect]) and mechanically connect it
to the junction box on the motor or the external junction box with the lock nut. There will be four (4) wires
in the cable, match them with the PVC electrical tape. There should be one (1) green wire remaining,
which is used for the ground connection. Replace the screws that go on the cover of the junction box.
Bolt the safety panel back in place using the six (6) bolts removed in Section e above (Tumbler Junction
Box Disconnect), then bolt the lower left side panel back in to place using the four (4) bolts also removed
in Section e above (Tumbler Junction Box Disconnect).

17

D. EXTERNAL SUPPLY CONNECTIONS

1. Sprinkler Water Supply

A 40 PSI supply of water must be connected into the 1” N.P.T. sprinkler connection located on the left side
of the tumbler base.

2. Compressed Air Supply

A minimum of 20 cubic feet per hour (cfh) at 80 PSI of dry, clean, and regulated compressed air must be
supplied to the dryer.

The compressed air supply must be connected into the 3/8” F.P.T. fitting which is located in the rear corner
of the lower heat console section.

18

3. Steam Supply and Condensate Return Connections

The steam supply into the dryer is made into the 2-1/2” F.T.P. pipe fitting located on top of the heat module
console.

The maximum operating steam supply pressure is 150 psig (10.34 bar).

The presence of condensate in the steam supply will cause water hammer and subsequent steam coil
(battery) failure. The steam supply connection out of the main supply line must be made with a minimum 10­inch riser. This will reduce the amount of condensate in the steam supply.

Use flexible couplings at the supply and return connections. The dryer vibrates slightly when it runs and the
piping connections may crack if they are hard piped to the dryer. Install shut-off valves in the supply and
return lines.

An inverted bucket steam trap with an internal check valve is included with the dryer. The supply lines
should be insulated. This will save energy and provide for the safety of the operator and maintenance
personnel.

Water pockets in the supply line, caused by low points, will provide wet steam to the coil possibly causing
steam coil damage. ALL horizontal runs of steam supply piping should be pitched 1/4-inch for the header.
Install a bypass trap in any low point to eliminate wet steam.

The condensate return line must be 1-1/4” (3.18 cm) pipe.

19

4. Exhaust Ducting

The dryer’s exhaust air must be vented to the outdoors by the shortest route possible with the number of
elbows kept to a minimum. The duct should be designed and installed by qualified technicians.

Improperly designed duct work may reduce the airflow through the dryer, causing improper and unsafe
drying conditions. The static pressure of the air in the duct work must not exceed 1.25 inches water column
(3.10 millibar). The dryer exhausts 11,600 cfm (328.5 cmm) of air during the drying cycle, 13,000 cfm
(368.2 cmm) during cool down. Ducting must be sized for the 13,000 cfm (368.2 cmm) of airflow.

The exhaust vent connection is located on top of the burner and heater section of the dryer. It has a rectangle
cross section and is flanged.

A sheet metal transition piece is supplied to connect a 24-inch diameter exhaust duct to the dryer’s exhaust
vent connection. Care must be taken in locating this transition piece so that the tilting tumbler section does
not hit the transition piece.

The duct work connecting the vent to the outdoors must be a minimum of 24-inches in diameter for a round
duct or 625 square inches for a rectangular duct (a 22-inch square duct would be sufficient).

20

MAN2371

The duct work must be smooth on the inside with no projections from sheet metal screws or other
obstructions which would collect lint. Inspection doors must be installed at strategic points in the duct work
for periodic lint removal.

Use smooth sweeping elbows instead of sharp 90º elbows. The radius of an elbow should be at least
1-1/2 times the duct diameter.

When the exhaust duct goes through a combustible wall on a roof, leave a 2-inch clearance space between
the exhaust ducting and the wall or roof.

When adding ducts, the duct that leaves the building must be protected from the weather. For horizontal
ducting use a 90º turned downward . For vertical duct work use a 180º turned downward. In either case,
allow at least twice the diameter of the duct between the duct opening and nearest obstruction. (If the duct
is rectangular, leave twice the smallest face dimension.)

IMPORTANT : DO NOT use screen or caps on the outside opening of the exhaust duct work.

Screens will clog with lint and caps will restrict the exhaust airflow.

21