American Dryer Corp. AD-670 Phase 7 User manual

For replacement parts, contact the reseller from which the dryer
was purchased or
AmericanDryerCorporation
88CurrantRoad
FallRiver,MA02720-4781
Telephone:[phone] / Fax: [phone]
E-mail: [e-mail]
www.amdry.com
103100GS/tcosta ADCPartNo.113049
AD-670 Installation Manual
Phase 7 / Gas Only
WARNING: Foryoursafetytheinformationin
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
vapors and liquids in the vicinity of this or any
otherappliance.
—WHAT TO DO IF YOU SMELL GAS:
•Do not try to light any appliance.
•Do not touch any electrical switch; do not
useany phone in yourbuilding.
•Cleartheroom, building or area of all
occupants.
•Immediatelycall your gas supplierfrom a
neighbor’s phone. Follow the gas supplier’s
instructions.
•Ifyoucannot reach your gas supplier, call
thefire department.
—Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
AVERTISSEMENT: Assurez-vous de bien
suivreles instructions donnéesdanscettenotice
pour réduire au minimum le risque d’incendie
ou d’explosion ou pour éviter tout dommage
matériel,toute blessure ou lamort.
—Ne pas entreposer ni utiliser d’essence ni
d’autres vapeurs ou liquides inflammables à
proximité de cet appareil ou de tout autre
appareil.
—QUEFAIRESIVOUSSENTEZUNEODEUR
DEGAZ:
•Ne pas tenter d’allumer d’appareils.
•Netouchezà aucun interrupteur. Ne pas
vous servir des téléphones se trouvant dans
lebâtiment.
•Évacuez la pièce, le bâtiment ou la zone.
•Appelezimmédiatementvotrefournisseur
degazdepuisunvoisin. Suivezles
instructionsdu fournisseur.
•Sivous ne pouvez rejoindrele fournisseur
de gaz, appelez le service des incendies.
—L’installation et l’entretien doivent être assurés
paruninstallateurouunserviced’entretienqualifié
ouparlefournisseurde gaz.

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 manual included with
the dryer.
The following “FOR YOUR SAFETY” caution must be posted near the dryer in a prominent location.
“IMPORTANTNOTE TOPURCHASER”
Informationmust beobtained from your local gassupplierontheinstructions
to be followed if the user smells gas. These instructionsmust be postedin a
prominentlocationnearthedryer.
FORYOUR SAFETY
Do not store or use gasoline or
otherflammable vapors and
liquidsinthevicinity of this or
any other appliance.
POUR VOTRE SÉCURITÉ
Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables à proximité de cet
appareiloudetoutautre 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. The illustrations included in this manual may not depict your particular dryer exactly.
Important
For your convenience, log the following information:
DATEOFPURCHASE _______________________________ MODEL NO. __________________________________________
RESELLER’SNAME _______________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Replacement parts can be obtained from your reseller or the ADC factory. When ordering replacement parts from the factory,
you can FAX your order to ADC at [phone] or telephone your order directly to theADC Parts Department at (508)
678-9000. Please specify the dryer model number andserialnumberin addition to thedescription andpartnumber, so that
your order is processed accurately and promptly.
AD-670 Phase 7

IMPORTANT
YOUMUSTDISCONTINUEANDLOCKOUTTHEELECTRICSUPPLYANDTHEGAS
SUPPLYBEFORE ANY COVERS, GUARDS, OR DOORS ARE REMOVED OR
OPENEDTOALLOWACCESSFORCLEANING,ADJUSTING,INSTALLATION,OR
TESTING OF ANY EQUIPMENT PER OSHA (Occupational Safety and Health
Administration) STANDARDS.
CHILDRENSHOULDNOTBEALLOWEDTOPLAYONORNEARTHEDRYERS.
WARNING
CHILDRENSHOULD BESUPERVISEDIFNEARDRYERSINOPERATION.
DRYERSSHOULDNEVER BELEFT UNATTENDEDWHILEINOPERATION.
CAUTION
FORYOURSAFETY
DONOTDRY MOPHEADS INTHEDRYER.
DONOTUSEDRYER INTHE PRESENCEOF DRYCLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch,
heat safety circuit, or tilt switches ever be disabled.
«Attention: Au moment de l’entretien des
commandes, étiquetez tous les fils avant de
les débrancher. Des erreurs de câblage
peuvent entraîner un fonctionnement
inadéquatet dangereux.»
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”

WARNING
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or
specified in the installation manual included with the dryer.
Dryers must not beinstalled or stored in an area where it willbe exposed to water or weather.
The wiring diagram for the dryer is located in the left front electrical control cabinet.
DRYERMUSTNEVERBEOPERATEDWITHOUTTHELINTDRAWERSIN PLACE,
EVENIFANEXTERNALLINTCOLLECTIONSYSTEMISUSED.
WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panelsremoved. PERSONAL INJURY OR FIRE COULD RESULT.

Table of Contents
SECTION I
IMPORTANT INFORMATION ............................................................................ 3
A. Receivingand Handling ........................................................................................................... 3
B. SafetyPrecautions .................................................................................................................. 4
SECTION II
SPECIFICATIONS AND DIMENSIONS ............................................................. 6
A. Specifications......................................................................................................................... 6
B. Dimensions ............................................................................................................................ 7
SECTION III
INSTALLATION PROCEDURES......................................................................... 8
A. LocationRequirements ........................................................................................................... 8
B. FreshAirSupplyRequirements ............................................................................................... 9
C. ExhaustRequirements........................................................................................................... 10
D. ElectricalRequirements......................................................................................................... 13
E. GasRequirements ................................................................................................................ 15
F. CompressedAirRequirements .............................................................................................. 18
G. PreoperationalTests ............................................................................................................. 19
H. PreparationFor Operation/Start-Up ...................................................................................... 21
I. ShutDown Instructions ......................................................................................................... 22
SECTION IV
ROUTINE MAINTENANCE ............................................................................... 23
A. Cleaning .............................................................................................................................. 23
B. Adjustments......................................................................................................................... 25
C. Lubrication .......................................................................................................................... 25
SECTION V
SERVICE/PARTS INFORMATION.................................................................... 26
A. Service................................................................................................................................ 26
B. Parts ................................................................................................................................... 26
SECTION VI
WARRANTY INFORMATION............................................................................ 27
A. ReturningWarranty Cards..................................................................................................... 27
B. Warranty ............................................................................................................................. 27
C. ReturningWarranty Parts ...................................................................................................... 27

SECTION VII
DATA LABEL INFORMATION .......................................................................... 29
A. Data Label........................................................................................................................... 29
SECTION VIII
GAS TRAIN AND BURNER DESCRIPTION AND OPERATION................. 31
A. PilotGasSupplyLine ........................................................................................................... 31
B. MainGas Supply Line .......................................................................................................... 33
C. Lo-Fire Gas Supply Line Loop ............................................................................................. 34
SECTION IX
COMPONENT SYSTEM DESCRIPTIONS...................................................... 35
A. Basket(Tumbler)DriveSystem............................................................................................. 35
B. Basket(Tumbler) ................................................................................................................. 36
C. BlowerSystem..................................................................................................................... 36
D. AirJet System ..................................................................................................................... 36
E. SafetyDevices ..................................................................................................................... 36
SECTION X
PHASE 7 OPL SYSTEM DIAGNOSTICS.......................................................... 38
A. Diagnostic(L.E.D.Display)FaultMessages ........................................................................... 38
B. I/OBoardInputand Output L.E.D. Indicators........................................................................ 40
SECTION XI
TROUBLESHOOTING ........................................................................................ 45
SECTION XII
OPTIONAL SPRINKLER SYSTEM COMPONENTS..................................... 52

3
SECTION I
IMPORTANT INFORMATION
A. RECEIVING AND HANDLING
The dryer is shipped in three (3) pieces with protective stretch wrap, protective cardboard corners, and top
covers as a means of preventing damage in transit. Upon delivery, the individual pieces and/or packaging, and
wooden skids 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 dryer must be transported and handled in an upright position at ALL times.

4
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 safety guards, service
panels, or service doors removed or open. 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 dryer, there are some articles that, due to fabric composition or
cleaning method, should not be dried in it.
WARNING: Dry only water washed fabrics. DO NOT dry articles spotted or washed in dry
cleaning solvents, 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.

5
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 may be a fire hazard.
7. A program should be established for the inspection and cleaning of lint in the burner area, exhaust ductwork,
and area around the back of the dryer. The frequency of inspection and cleaning can best be determined
from experience at each location.
WARNING: The collection of lint in the burner area and exhaust ductwork 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,
or tilt switches 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. READAND FOLLOWALLCAUTIONAND DIRECTION LABELSATTACHEDTOTHEDRYER.
13. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than sixty-six percent (66%) 442 lbs (200 kg) of its rated capacity.
WARNING: YOU MUST DISCONTINUE AND LOCKOUT THE ELECTRIC SUPPLY
AND THE GAS SUPPLYBEFORE ANY COVERS, GUARDS, OR DOORS
ARE REMOVED OR OPENED TO ALLOWACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, OR TESTING OFANY EQUIPMENT PER
OSHA (Occupational Safety and Health Administration) STANDARDS.

6
SECTION II
SPECIFICATIONSAND DIMENSIONS
A. SPECIFICATIONS
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
Gas
Maximum Capacity (Dry Weight) 670 lb 303.9 kg
Basket Diameter 78-1/4" 198.8 cm
Basket Depth 92" 233.7 cm
Basket Volume 256 cu ft 7.25 cu m
Blower Motor 2 x 5 hp 2 x 3.73 kW
Basket Motor 25 hp 18.7 kW
Door Sill Height, Level 52" 132.1 cm
Compressed Air Volume (1-way / 2-way tilt) 15/19 cfh 0.42/0.54 cmh
Compressed Air Connection 1/2" F.N.P.T.
S.A.F.E. Water Connection* 1" F.N.P.T.
Voltage Available 208-480v / 3Ø / 3,4w / 50/60 Hz
Heat Input 2,200,000 Btu/hr 554,400 kcal/hr
Approx. Shipping Weight 9,200 lb 4,173 kg
Airflow 13,000 cfm 368 cmm
Inlet Pipe Connection** 2" F.N.P.T.
061103
* Water supply must be 40 psi +/- 20 psi (2.75 bar +/- 1.37 bar) for S.A.F.E. system to operate properly .
** Size of piping to dryer varies with installation conditions. Contact factory for assistance.

7
AD-670 1 Door Tilting/2 Door Tilting
B. DIMENSIONS
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.

8
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 installationmust conformto 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 (Liquid Propane [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. LOCATION REQUIREMENTS
Before installing the dryer, be sure the location conforms to local codes and ordinances. In the absence of such
codes or ordinances the location must conform with the National Fuel Gas Code ANSI.Z223.1 LATEST
EDITION, or in Canada, the installation must conform to applicable Canadian Standards: CAN/CGA-B149.1-
M91 (Natural Gas) or CAN/CGA-B149.2-M91 (L.P. Gas) or LATEST EDITION (for General Installation and
Gas Plumbing).
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 noncombustible floors only.”
2. The dryer must not be installed or stored in an area where it will be exposed to water and/or weather.
3. The dryer is for use in noncombustible locations.
4. Provisions for adequate air supply must be provided as noted in this manual (refer to Fresh Air Supply
Requirements in Section B).
5. Dryer must be exhausted to the outdoors as noted in this manual (refer to Exhaust Requirements in
Section C).
6.Dryer must be located in an area where correct exhaust venting can be achieved as noted in this manual
(refer to Exhaust Requirements in Section C).
IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be
necessary.
7. The dryer must be installed with a proper exhaust duct connection to the outside.
8. The dryer must be installed with provisions for adequate combustion and make-up air supply.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every
6 months, inspect the exhaust ducting and remove any lint build up.

9
B. FRESH AIR SUPPLYREQUIREMENTS
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 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. As a general rule, an unrestricted air entrance from the
outdoors (atmosphere) of a minimum of 16 square feet (1.48 square meters) is required for each dryer for
proper combustion.
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 a separate make-up air opening for each dryer. Common make-up air openings are
acceptable. However, they must be set up in such a manner that the make-up air is distributed equally to ALL
the dryers. The dryer must be installed with provisions for adequate combustion and make-up air supply.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.

10
IMPORTANT: Make-up air must be provided from a source free of dry cleaning solvent fumes.
Make-up air that is contaminated by dry cleaning solvent fumes will result in
irreparable damage to the motors and other dryer components.
NOTE: Component failure due to dry cleaning solvent fumes will VOID THE WARRANTY.
C. EXHAUST REQUIREMENTS
IMPORTANT: Each AD-670 must be individually exhausted to the outdoors.
1. General Exhaust Ductwork Information
Exhaust ductwork should be designed and installed by a qualified professional. Improperly sized ductwork
will create excessive back pressure which results in slow drying, increased use of energy, overheating of
the dryer, and shutdown of the burner by the airflow (sail) switches, burner hi-limits, or basket (tumbler)
hi-heat thermostats. The dryer must be installed with a proper exhaust duct connection to the outside.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK CAN
CREATE A POTENTIAL FIRE HAZARD.
NOTE: When a dryer is exhausted separately, it is not recommended that a back draft damper
be installed.
The ductwork should be laid out in such a way that the ductwork travels as directly as possible to the
outdoors with as few turns as possible.
The shape of the ductwork 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 30º and/or 45º angles instead. The radius of
the elbow should preferably be 1-1/2 times the diameter of the duct.
The dryer comes with a 24-inch (60.96 cm) diameter exhaust duct connection. The plant’s exhaust duct
must be at least 24-inches (60.96 cm) in diameter or for a rectangular duct have a cross-sectional area of
452 square inches (2916 square centimeters). The shape of the ductwork is not critical so long as the
minimum cross-sectional area is provided. It is suggested that the use of 90º turns 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 (tumbler)/dryer elbow connections or elbows used for outside protection from the
weather, no more than two (2) elbows should be used in the exhaust duct run. If more than two (2) elbows
are used, the cross-sectional area of the ductwork must be increased.
ALL ductwork should be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the duct to be added should overlap the duct to which it is to
be connected. ALL ductwork joints must be taped to prevent moisture and lint from escaping into the
building. Inspection doors should be installed at strategic points in the exhaust ductwork for periodic
inspection and cleaning of lint from the ductwork.

11
IMPORTANT: Exhaust back pressure measured by a Magnehelic in the exhaust duct must be no
less than 0 and must not exceed 1.0 inch (2.48 mb) of water column (W.C.).
NOTE: When the exhaust ductwork passes through a wall, ceiling, or roof made of combustible
materials, the opening must be 2-inches (5.08 cm) larger than the duct (all the way
around). The duct must be centered within this opening.
a. Outside Ductwork Protection
1) To protect the outside end of the horizontal ductwork from the weather, a 90º elbow turned downward
should be installed where the exhaust exits the building. If the ductwork travels vertically up
through the roof, it should be protected from the weather by using a 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, louvers, or caps on the outside opening of the exhaust
ductwork.

12

13
D. 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 to local and state regulations or codes. In the
absence of such codes, ALL electrical connections, materials, and workmanship must conformto the applicable
requirements of the National Electrical Code ANSI/NFPA NO. 70-LATEST EDITION or in Canada, the Canadian
Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION.
IMPORTANT: Failure to comply with these codes or ordinances, and/or the requirements
stipulated in this manual can result in personal injury or component failure.
NOTE: Component failure due to improper installation will VOID THE WARRANTY.
It is required that a separate circuit servicing each basket (tumbler) be provided. The dryer must be connected
with copper wire only. DO NOT use aluminum wire, which could cause a fire hazard.
NOTE: The use of aluminum wire will VOID THE WARRANTY.
1. Electrical Service Specifications
IMPORTANT: THE DRYER MUST BE CONNECTEDTO THEELECTRIC SUPPLY
SHOWN ON THE DATA LABEL THAT IS AFFIXED TO THE LEFT
SIDE OF THE MAIN ELECTRICAL CABINET LOCATED IN THE
RIGHT HAND ELECTRICAL ENCLOSURE.
GAS
ELECTRICAL SERVICE SPECIFICATIONS (PER DRYER)
IMPORTANT:
NOTES: A.
B.
C.
208 VAC AND 230/240 VAC ARE NOT THE SAME. When ordering,
specify exact voltage.
When fuses are used they must be dual element, time delay, current
limiting, class RK1 or RK5 ONLY. Calculate/determine correct fuse
value, by applying either local and/or National Electrical Codes to
listed appliance amp draw data.
Circuit breakers are thermal-magnetic (industrial) motor curve type
ONLY. For others, calculate/verify correct breaker size according to
appliance amp draw rating and type of breaker used.
Circuit breakers for 3-phase (3ø) dryers must be 3-pole type.
SERVICE
VOLTAGE PHASE WIRE SERVICE
APPROX.
AMP DRAW CIRCUIT
BREAKER
60 Hz 50 Hz
208 3ø 3 / 4 118.1 —150
230 3ø 3108.7 —150
230 3ø 3— — —
380 3ø 3 / 4 —66.8 90
400 3ø 3 / 4 —67.4 90
416 3ø 3 / 4 —65.4 90
460 3ø 358.9 —90
480 3ø 359.3 —90

14
WARNING: 208 VAC AND 240 VAC ARE NOT THE SAME. Any damage done to the dryer
components due to improper voltage connections will automatically VOID THE
WARRANTY.
NOTE: ADC reserves the right to make changes in specifications at any time without notice or
obligation.
2. Electrical Connections
NOTE: A wiring diagram is included with each dryer and is located in the blueprint pocket
inside the left hand side control cabinet.
The main 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 right side base electrical enclosure.
If the dryer has an optional sprinkler circuit then a separate single-phase (1ø) source must be supplied to
the sprinkler circuit at the nameplate voltage. These connections are made at the power distribution block
located in the right side base electrical enclosure.
The main electrical 3-phase (3ø) connections (L1, L2, and L3) and the optional single-phase (1ø) connection
must be provided and installed in accordance with state and local codes. In ALL cases, a strain relief
must be used where the wire(s) enter the dryer electrical service (relay) box.
NOTE: ACIRCUIT SERVICING EACH DRYER MUST BE PROVIDED.
3. Main Grounding
A ground (earth) connection 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 installation must conform to applicable
Canada Standards: Canadian Electrical Codes Parts 1 & 2 CSA C22.1-1990 or LATEST EDITION. The
ground connection may be to a proven earth ground at the location service panel.
NOTE: A grounding connection (terminal block) is provided in the dryer in the base electrical
junction box.
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 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 controller (computer), an earth (zero)
ground is required.
NOTE: Grounding via metallic electrical conduit (pipe) is not recommended.

15
E. GAS REQUIREMENTS
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 to 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 (Liquid Propane [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 shutoff valves 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 shutoff valve during any pressure test of the gas
supply system at test pressures equal to or less than 1/2 psig (3.5 kPa).
IMPORTANT: Failure to isolate or disconnect the dryer from gas supply as noted can cause
irreparable damage to the gas valve, which will VOID 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 data label affixed to the left
side of the main electrical cabinet located in the right hand electrical enclosure. If this information does
not agree with the type of gas available, DO NOT operate the dryer.Contact the reseller who sold the
dryer or contact the ADC factory.
IMPORTANT: Any adjustments to the gas train 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 of 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 dryers in the field for elevations over 2,000 feet
(609.6 meters) is made by changing the adjustments on the gas train. If adjustments are necessary, contact
the reseller who sold the dryer or contact the ADC factory.

16
2. Technical Gas Data
a. Gas Specifications
* Measured at the gas valve pressure tap when the gas valve is on.
b. Gas Connections
Run a 2-inch gas pipe from the main gas header to the dryer. There is a 2-inch gas pipe connection at
the bottom of the dryer base.
Inlet Connection ...................2” F.P.T.
BTU/hr input (per dryer) ......2,200,000 BTU/hr (554,400 kcal/hr)
TYPE OF GAS
Natural Liquid Propane
Pressure @ Hi-Fire Gas Valve* 3.5 inches W.C. 8.7 mb 6.5 inches W.C. 16.17 mb
Pressure @ Gauge P1* 3.5 inches W.C. 8.7 mb 6.5 inches W.C. 16.17 mb
Pressure Into Internal Regulator 6.0 - 12.0 inches W.C. 14.92 mb - 29.9 mb 11.0 inches W.C. 27.4 mb
Shaded areas are stated in metric equivalents