MAXIDRY MAXIMD115 User manual

MAXIMD115 Installation Manual
Phase 7 / Dual Timer / Phase 5 / S.A.F.E. System
WARNING: For your safety the information
in this manual must be followed to
minimize the risk of fire or explosion and
to prevent property dama e, personal
injury or death.
— Do not store or use asoline or other
flammable vapors and liquids in the
vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS:
●Do not try to li ht any appliance.
●Do not touch any electrical switch;
do not use any phone in your
buildin .
●Clear the room, buildin or area of
all occupants.
●Immediately call your as supplier
from a nei hbor’s phone. Follow
the as supplier’s instructions.
●If you cannot reach your as
supplier, call the fire department.
— Installation and service must be
performed by a qualified installer, service
a ency or the as supplier.
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 domma e matériel, toute blessure ou
la mort.
—Ne pas entreposer ni utiliser d’essence
ni d’autres vapeurs ou liquides
inflammables à proximité de cet
appareil ou de tout autre appareil.
—QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ:
●Ne pas tenter d’allumer d’appareils.
●Ne touchez à aucun interrupteur. Ne
pas vous servir des téléphones se
trouvant dans le bâtiment.
●Évacuez la pièce, le bâtiment ou la
zone.
●Appelez immédiatement votre
fournisseur de az depuis un voisin.
Suivez les instructions du fournisseur.
●Si vous ne pouvez rejoindre le
fournisseur de az, appelez le service
des incendies.
—L’installation et l’entretien doivent être
assurés par un installateur ou un
service d’entretien qualifié ou par le
fournisseur de az.
Maxidry
Part No. 113267-1

Retain This Manual In A Safe Place For Future Reference
This product embody advanced concepts in engineering, design, and safety. If this product is properly maintained,
it will provide many years of efficient, trouble free and, most importantly, safe 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 ust be posted near the dryer in a prominent location.
“IMPORTANT NOTE TO PURCHASER”
Information ust be obtained from your local gas supplier on the instructions
to be followed if the user smells gas. These instructions ust be posted in a
prominent location near the dryer.
We have tried to make this manual as complete as possible and hope you will find it useful. The manufacturer
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.
I portant
or your convenience, log the following information:
DATE OF PURCHASE ___________________________________________ MODEL NO. ______________________________
RESELLER’S NAME _______________________________________________________________________________________
Serial Nu ber(s) ________________________________________________________________________________________
__________________________________________________________________________________________________________
__________________________________________________________________________________________________________
These instructions are only valid if the following country code is on the appliance… If this code is not present on
the appliance, it is necessary to refer to the technical instructions which will provide the necessary information
concerning the modification of the appliance to the condition of use for the country.
In accordance with EN ISO 3166-1, the names of countries shall be represented by the following codes:
GB United Kingdom
IE Ireland
FOR YOUR SAFETY
Do not store or use asoline
or other flammable vapors
and liquids in the vicinity 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
appareil ou de tout autre appareil.

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.
WARNING
CHILDREN SHOULD NOT BE ALLOWED TO PLAY ON OR NEAR THE DRYER(S).
CHILDREN SHOULD BE SUPERVISED IF NEAR DRYERS IN OPERATION.
CAUTION
DRYERS SHOULD NEVER BE LE T UNATTENDED WHILE IN OPERATION.
“Caution: Label all wires prior to
disconnection when servicing
controls. Wiring errors can cause
improper operation.”
«Attention: Au moment de l’entretien des commandes,
étiquetez tous les fils avant de les débrancher. Des
erreurs de câblage peuvent entraîner un fonctionnement
inadéquat et dangereux.»
Proposition65
Useof thisproduct couldexpose youto substancesfrom fuelcombustion
thatcontainchemicalsknownto theState of Californiatocausecancer,
birthdefects andotherreproductiveharm.
In the State of Massachusetts, the followin installation instructions apply:
■Installations and repairs must be performed by a qualified or licensed contractor, plumber,
or asfitter qualified or licensed by the State of Massachusetts.
■If usin a ball valve, it shall be a T-handle type.
■A flexible as connector, when used, must not exceed 3 feet.
!WARNING

IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equip ent and/or
specified in the installation anual included with the dryer.
Dryer 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.
IMPORTANT
Dryer must be installed in a location/environ ent in which the a bient te perature
re ains between 40° F (4.44° C) and 130° F (54.44° C).
FOR YOUR SAFETY
DO NOT DRY MOP HEADS IN THE DRYER.
DO NOT USE DRYER IN THE PRESENCE O DRY CLEANING UMES.
WARNING
UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch,
or heat safety circuit ever be disabled.
The dryer must never be operated with any of the back guards, outer tops, or service
panels re oved. PERSONAL INJURY OR FIRE COULD RESULT.
DRYER MUST NEVE BE OPERATED WITHOUT THE LINT FILTER/SCREEN IN
PLACE, EVEN IF AN EXTERNAL LINT COLLECTION SYSTEM IS USED.
If the hi-li it switch trips, a service call is required to investigate the reason and
resolve the issue.

Table of Contents
SECTION I
SAFETY PRECAUTIONS .............................................................................................................................. 2
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION ......................................................................... 4
A. Specifications .......................................................................................................................................... 4
B. Component Identification ........................................................................................................................ 6
SECTION III
INSTALLATION PROCEDURES ................................................................................................................ 8
A. Location Requirements ........................................................................................................................... 8
B. Unpacking and Setting Up ...................................................................................................................... 9
C. Dryer Enclosure Requirements ............................................................................................................ 12
D. resh Air Supply Requirements ............................................................................................................ 12
E. Exhaust Requirements .......................................................................................................................... 13
. Electrical Information ........................................................................................................................... 17
G. Gas Information .................................................................................................................................... 21
H. Steam Information ................................................................................................................................ 25
I. Water Information ................................................................................................................................ 28
J. Preparation for Operation and Start-Up .............................................................................................. 31
K. Preoperational Test ............................................................................................................................... 32
L. Preoperational Instructions ................................................................................................................... 34
M. Shutdown Instructions .......................................................................................................................... 35
SECTION IV
SERVICE/PARTS INFORMATION ...........................................................................................................36
A. Service .................................................................................................................................................. 36
B. Parts...................................................................................................................................................... 36
SECTION V
WARRANTY INFORMATION ...................................................................................................................37
A. Returning Warranty Cards ................................................................................................................... 37
B. Warranty ............................................................................................................................................... 37
C. Returning Warranty Parts ..................................................................................................................... 37
SECTION VI
ROUTINE MAINTENANCE ......................................................................................................................39
A. Cleaning ................................................................................................................................................ 39
B. Adjustments .......................................................................................................................................... 40
C. Lubrication ............................................................................................................................................ 40
SECTION VII
DATA LABEL INFORMATION .................................................................................................................41
SECTION VIII
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT COMPONENTS ...................42
SECTION IX
MANUAL RESET BURNER HI-LIMIT INSTRUCTIONS .................................................................. 45
A. Phase 7 ................................................................................................................................................. 45
B. Dual Timer / Phase 5 ............................................................................................................................ 45

2113267-1
SECTION I
SAFETY PRECAUTIONS
WARNING: For your safety, the information in this manual must be followed to minimi e 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 guard , outer top , or
ervice panel 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 that
the user smells gas. These instructions hould 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 mu t be performed by a qualified installer, service agency, or gas supplier.
5. Dryers mu t be exhausted to the outdoors.
6. Although the manufacturer produces a very versatile dryer, there are some articles that, due to fabric
composition or cleaning method, hould 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 ha ard.
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 may create a fire ha ard.

113267-1 3
7. A program hould be established for the inspection and cleaning of lint in the heating unit area, exhaust
ductwork, and inside the dryer. The frequency of inspection and cleaning can best be determined from
experience at each location.
WARNING: The collection of lint in the burner area and exhaust ductwork could create a fire ha ard.
8. For personal safety, the dryer mu t 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 electrically ground the dryer properly will VOID THE WARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switch, lint door switch, or the heat safety
circuit ever be disabled.
WARNING: PERSONAL INJURY OR FIRE COULD RESULT SHOULD THE DRYER
DOOR SWITCH, LINT DOOR SWITCH, OR THE HEAT SAFETY CIRCUIT
EVER BE DISABLED.
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 could
create a fire ha ard.
12. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE DRYER.
13. For safety, proper operation, and optimum performance, the dryer mu t not be operated with a load less
than sixty-six percent (66%), 76 lb (34.5 kg), of its rated capacity.
WARNING: YOU MUST DISCONNECT AND LOCKOUT THE ELECTRIC SUPPLY AND
THE GAS SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR
GUARDS ARE REMOVED FROM THE MACHINE TO ALLOW ACCESS
FOR CLEANING, ADJUSTING, INSTALLATION, OR TESTING OF ANY
EQUIPMENT PER OSHA (Occupational Safety and Health Administration)
STANDARD.
IMPORTANT: Dryer must be in talled in a location/environment in which the ambient
temperature remain between 40° F (4.44° C) and 130° F (54.44° C).
WARNING: Disconnect power before resetting the hi-limit. The hi-limit is located on the left side of
the burner box, looking at the burner from the back of the dryer. Press and release and
the hi-limit will reset.

4113267-1
MAXIMUM CAPACITY (DRY WEIGHT) 11 5 lb 52.16 kg
TUMBLER DIAMETER 42” 106.68 cm
TUMBLER DEPTH 41-1 4” 104.78 cm
TUMBLER VOLUME 33.10 cu ft 937.29 L
TUMBLER DRIVE MOTOR 3 4 hp 0.56 kW
BLOWER FAN MOTOR 3 hp 2.24 kW
DOOR OPENING (DIAMETER) 31-3 8” 79.69 cm
DOOR SILL HEIGHT 27-1 2” 69.85 cm
WATER CONNECTION 3 4 ”-11.5 NH
(North America)
3 4” B.S.P.T. (Outside North America)
DRYERS PER 20’ 40’ CONTAINER 4 8
DRYERS PER 48’ 53’ TRUCK 9 10
VOLTAGE AVAILABLE 208-575V 3ø 3,4w 50 60 Hz
APPROXIMATE NET WEIGHT 1,260 lb 571.53 kg
APPROXIMATE SHIPPING WEIGHT 1,400 lb 635.03 kg
AIRFLOW 60 Hz 2,100 cfm 59.47 cmm
50 Hz 1,750 cfm 49.55 cmm
HEAT INPUT 343 ,0 0 0 B tu hr 86,435 kcal/hr
EXHAUST CONNECTION (DIAMETER) 14 ” 35.56 cm
COMPRESSED AIR CONNECTION N A
COMPRESSED AIR VOLUME N A
INLE T P IPE C ONNECTION 1 ” F.N . P. T.
1” F.B.S.P.T.
(CE and Australia Only)
VOLTAGE AVAILABLE 208-575V 3ø 3,4w 50 60 Hz
APPROXIMATE NET WEIGHT 1,260 lb 571.53 kg
APPROXIMATE SHIPPING WEIGHT 1,400 lb 635.03 kg
AIRFLOW 60 Hz 2,100 cfm 59.47 cmm
50 Hz 1,750 cfm 49.55 cmm
EXHAUST CONNECTION (DIAMETER) 14 ” 35.56 cm
COMPRESSED AIR CONNECTION N A
COMPRESSED AIR VOLUME N A
OVEN SIZE
kW Btu hr kcal/hr
60 204,700 51,600
72 245,700 61,900
VOLTAGE AVAILABLE 208-575V 3ø 3,4w 50 60 Hz
APPROXIMATE NET WEIGHT 1,555 lb 705.34 kg
APPROXIMATE SHIPPING WEIGHT 1,695 lb 768.84 kg
AIRFLOW 60 Hz 2,100 cfm 59.47 cmm
50 Hz 1,750 cfm 49.55 cmm
STEAM CONSUMPTION 375 lb hr 170.10 kg/hr
OPERATING STEAM PRESSURE 125 psi max 8.62 bar
EXHAUST CONNECTION (DIAMETER) 14 ” 35.56 cm
COMPRESSED AIR CONNECTION 1 8” N.P.T.
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
BOILER HORSEPOWER (NORMAL LOAD) 11 Bhp
SUPPLY CONNECTIONS (2) 1 -1 4” M.N.P.T.
RETURN CONNECTIONS (2) 1” M.N.P.T.
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION
A. SPECIFICATIONS
Electric
Steam Ga
Shaded areas are stated in metric equivalents 9 14 10
IMPORTANT: Steam dryers must be provided with a clean, dry, regulated 80 psi +/- 10 psi (5.51
bar +/- 0.69 bar) air supply.
NOTE: The manufacturer reserves the right to make changes in specifications at any time without
notice or obligation.

113267-1 5
Specification – Ga , Electric, and Steam
NOTE: The manufacturer reserves the right to make changes in specifications at any time without
notice or obligation.

6113267-1
B. COMPONENT IDENTIFICATION
1. Dryer Front View
Illus. No. Description
1 Microprocessor Control and Keypad Panel Assembly (controls)
2 Control (top access) Door Assembly
3 Main Door Assembly
4 Lint Door Assembly
5 Lint Drawer
6 Wire Diagram (located behind control door)
7 Top Console (module) Assembly

113267-1 7
2. Dryer Rear View
Illus. No. Description
1 Basket (tumbler) Drive Motor Assembly
2 Blower Motor Mount Assembly
3 Impellor (fan/blower) Assembly
4 Idler Bearing Mount Assembly
5 Basket (tumbler) Bearing Mount Assembly
6* Electric Service Relay Box
7 Heating Unit
8 Data Label and Installation Label
* Electric service connections are made in this box.

8113267-1
SECTION III
INSTALLATION PROCEDURES
Installation hould be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installation mu t conform to applicable American National Standards: ANSI Z223.1-
LATEST EDITION (National Fuel Gas Code) or ANSI/NFPA NO. 70-LATEST EDITION (National Electrical
Code) or in Canada, the installation mu t 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 mu t conform with the National Fuel Gas Code ANSI.Z223.1 LATEST
EDITION, or in Canada, the installation mu t 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 mu t be installed on a sound level floor capable of supporting its weight. Carpeting mu t 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 mu t not be installed or stored in an area where it will be exposed to water and/or weather.
3. This dryer is for use in noncombustible locations.
4. Provisions for adequate air supply mu t be provided as noted in this manual (refer to Fre h Air Supply
Requirement in Section D).
5. Clearance provisions mu t be made from combustible construction as noted in this manual (refer to Dryer
Enclo ure Requirement in Section C).
6. Provisions mu t be made for adequate clearances for servicing and for operation as noted in this manual
(refer to Dryer Enclo ure Requirement in Section C).
7. The dryer mu t be installed with a proper exhaust duct connection to the outside as noted in this manual
(refer to Exhau t Requirement in Section E).
8. Dryer mu t be located in an area where correct exhaust venting can be achieved as noted in this manual
(refer to Exhau t Requirement in Section E).
IMPORTANT: Dryer should be located where a minimum amount of exhaust duct will be necessary.
9. The dryer mu t be installed with adequate clearance for air openings into the combustion chamber.
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors. Every 6
months, inspect the exhaust ducting and remove any lint buildup.

113267-1 9
IMPORTANT: Dryer must be in talled in a location/environment in which the ambient
temperature remain between 40° F (4.44° C) and 130° F (54.44° C).
B. UNPACKING AND SETTING UP
Remove protective shipping material (i.e., plastic wrap and optional shipping box) from dryer.
IMPORTANT: Dryer must be transported and handled in an upright position at ALL times.
The dryer can be moved to its final location while still attached to the skid or with the skid removed. To unskid the
dryer, locate and remove the four (4) lag bolts securing the base of the dryer to the wooden skid. One (1) is
located at the rear base (remove the back panel for access), and two (2) are located in the bottom of the lint
chamber. To remove the two (2) lag bolts located in the lint chamber area, remove the lint drawer and the two (2)
Phillips head screws securing the lint door in place.
1. Leveling Dryer
To level dryer, place 4-inch (10.16 cm) square metal shims (refer to the illu tration above) or other
suitable material under the base pads. It is suggested that the dryer be tilted slightly to the rear.

10 113267-1
2. The V-belts are disconnected from the basket drive motor for shipping. Reconnect V-belts, using the
following instructions, before starting the dryer.
a. Remove hardware holding back (belt) guard and remove guard from dryer.
b. Lay one (1) belt into motor sheave (pulley) groove and wind belt into corresponding groove of the idler
pulley by rotating the idler pulley by hand. Rotate the idler pulley an extra turn or two (2) to ensure that
the belt is tracking properly in the motor sheave (pulley) and idler pulley grooves without twisting.
c. Repeat procedure to reconnect the remaining belt.
d. Replace back (belt) guard and hardware.
3. If more headroom is needed when moving dryer into position, the top console (module) may be removed,
using the following instructions.
a. Disconnect the ground wire (A) at the rear upper left hand corner of dryer.
b. Remove the eight (8) sets of nuts and washers (B) holding the console (module) to base.
c. Open the control door and control panel, and disconnect the white 15-pin plug connector (C) located in
the base of the control box.
d. Disconnect white plug connector located outside backside of the control box (provides power to heat
circuit).
e. Lift the console (module) off of the dryer base.
IMPORTANT: The dryer must be transported and handled in an upright position at ALL times.

113267-1 11
WARNING
An exhaust duct transition piece is shipped inside of the dryer’s
tumbler and MUST be installed on the dryer’s
exhaust duct, with the hardware provided, BEFORE
location venting is connected to the dryer.
THIS EXHAUST DUCT TRANSITION PIECE
MUST BE INSTALLED FIRST!
Failure to observe this installation requirement may result in
damage to the dryer, create a FIRE HAZARD and will VOID
the manufacturer’s warranty.
012999JEV-GS cj P N: 114092
4. Exhaust Transition Piece
Inside the basket (tumbler) of this dryer is an
exhaust transition piece that mu t be installed on
the outlet of the exhaust before any further venting
is connected:
a. Remove the exhaust transition piece from the
basket (tumbler) and place it on the exhaust
outlet.
b. Using the screws provided, secure the exhaust
transition piece to the dryer.
NOTE: It i recommended that this joint be taped
as well as ALL other duct joints to prevent
moisture and lint from escaping into the
building.

12 113267-1
C. DRYER ENCLOSURE REQUIREMENTS
Even though a 12-inch (30.48 cm) clearance is acceptable, it is recommended that the rear of the dryer be
positioned approximately 3 feet (0.91 meters) from the nearest obstruction (i.e., wall) for ease of installation,
maintenance, and service. Bulkheads and partitions hould be made from noncombustible materials. The
clearance between the bulkhead header and the dryer mu t be a minimum of 4-inches (10.16 cm) and must not
extend more than 4-inches (10.16 cm) to the rear of the dryer front. The bulkhead facing mu t not be closed in
ALL the way to the top of the dryer. A 2-inch (5.08 cm) clearance is required.
NOTE: Bulkhead facing should not be installed until after dryer is in place. Ceiling area must be
located a minimum of 12-inches (30.48 cm) above the top of the dryer. Even though a
minimum of only 12-inches (30.48 cm) is required, 18-inches (45.72 cm) or more is suggested
for steam dryers and especially in cases where sprinkler heads are over the dryers.
NOTE: When fire sprinkler systems are located above the dryers, a minimum of 18-inches (45.72 cm)
above the dryer console (module) is suggested. Dryers may be positioned sidewall to
sidewall; however, 1 or 2-inches (2.54 cm or 5.08 cm) is suggested between dryers (or wall)
for ease of installation and maintenance. Allowances must be made for the opening and
closing of the control and lint doors.
D. FRESH AIR SUPPLY REQUIREMENTS
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 mu t be continually replenished from the outdoors. If the
make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and sail
switch “fluttering” problems may result, as well as premature motor failure from overheating.

113267-1 13
Air supply (make-up air) mu t be given careful consideration to ensure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 2,100 cfm (cubic feet per minute) (59.5 cmm
[cubic meters per minute]) mu t be supplied to each dryer. As a general rule, an unrestricted air entrance from
the outdoors (atmosphere) of a minimum of 3 square feet (0.28 square meters) is required for each dryer.
To compensate for the use of registers or louvers used over the openings, this make-up air area mu t be
increased by approximately thirty-three percent (33%). Make-up air openings hould 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 mu t be set up in such a manner that the make-up air is distributed equally to ALL
the dryers. The dryer mu t be installed with provisions for adequate combustion and make-up air supply.
EXAMPLE: For a bank of six (6) gas dryers, two (2) openings measuring 3 feet by 3 feet (0.91 meters by 0.91
meters) are acceptable.
Allowances mu t be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT: Make-up air must be provided from a source free of dry cleaning 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.
E. EXHAUST REQUIREMENTS
1. General Exhaust Ductwork Information
Exhaust ductwork hould be designed and installed by a qualified professional. Improperly si ed 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 mu t be installed with a proper exhaust duct connection to the outside.
The design of the flue system shall be such that any condensate formed when operating the appliance from
cold shall either be retained and subsequently re-evaporated or discharged.

14 113267-1
CAUTION: This dryer produces combustible lint and must be exhausted to the outdoors.
CAUTION: IMPROPERLY SIZED OR INSTALLED EXHAUST DUCTWORK COULD
CREATE A FIRE HAZARD.
NOTE: When a dryer is exhausted separately, it i recommended that a back draft damper be
installed.
NOTE: When dryers are exhausted into a multiple (common) exhaust line, each dryer must be
supplied with a back draft damper.
The exhaust ductwork hould be laid out in such a way that the ductwork travels as directly as possible to
the outdoors with as few turns as possible. Single or independent dryer venting is recommended. When
single dryer venting is used, the ductwork from the dryer to the outside exhaust outlet mu t not exceed 20
feet (6.09 meters). In the case of multiple (common) dryer venting, the distance from the last dryer to the
outside exhaust outlet mu t not exceed 20 feet (6.09 meters). The shape of the ductwork is not critical as
long as the minimum cross section area is provided. It is suggested that the use of 90° turns in ducting be
avoided; use 30° and/or 45° angles instead. The radius of the elbows hould preferably be 1-1/2 times the
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 hould be used in the exhaust duct run. If more
than two (2) elbows are used, the cross section area of the ductwork mu t be increased in proportion to
number of elbows added.
IMPORTANT: It i recommended that exhaust or booster fans NOT BE USED in the exhaust
ductwork system.
NOTE: As per the National Fuel Gas Code, “Exhaust ducts for type 2 clothes dryers shall be
constructed of sheet metal or other noncombustible material. Such ducts shall be equivalent in
strength and corrosion resistance to ducts made of galvani ed sheet steel not less than 26
gauge (0.0195-inches [0.50 mm]) thick.”
ALL ductwork hould be smooth inside with no projections from sheet metal screws or other obstructions,
which will collect lint. When adding ducts, the ducts to be added should overlap the duct to which it is
connected. ALL ductwork joints mu t be taped to prevent moisture and lint from escaping into the building.
Additionally, inspection doors hould be installed at strategic points in the exhaust ductwork for periodic
inspection and cleaning of lint from the ductwork.
To protect the outside end of the hori ontal ductwork from the weather, a 90° elbow bent downward hould
be installed where the exhaust exits the building. If the ductwork travels vertically up through the roof, it
hould be protected from the weather by using a 180° turn to point the opening downward. In either case,
allow at least twice the diameter of the duct between the duct opening and the nearest obstruction (i.e., roof
or ground level).
IMPORTANT: Exhaust back pressure measured by a manometer at the dryer exhaust duct area must
be no less than 0 and must not exceed 0.3 inches (0.74 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.

113267-1 15
Outside Ductwork Protection
To protect the outside end of the hori ontal ductwork from the weather, a 90° elbow bent downward hould
be installed where the exhaust exits the building. If the exhaust ductwork travels vertically up through the
roof, it hould be protected from the weather by using a 180° turn to point the opening downward. In either
case, allow at least twice the diameter of the duct between the duct opening and the nearest obstruction.
IMPORTANT: DO NOT use screens, louvers, or caps on the outside opening of the exhaust
ductwork.
2. Single Dryer Venting
When possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust duct hould
be laid out in such a way that the ductwork travels as directly as possible to the outdoors with as few turns
as possible. It is suggested that the use of 90° turns in ducting be avoided; use 30° and/or 45° angles instead.
The shape of the exhaust ductwork is not critical as long as the minimum cross section area is provided.
IMPORTANT: Minimum duct si e for a gas, electric, or steam dryer with a vertical run and not more
than three (3) elbows (including dryer connection and outside outlets) is 16-inches
(40.64 cm) for a round duct or 14-1/2” by 14-1/2” (36.83 cm by 36.83 cm) for a
square duct. DUCT SIZE MUST NOT BE REDUCED ANY HERE
DO NSTREAM OF DRYER.
IMPORTANT: Exhaust back pressure measured by a manometer at each basket (tumbler) exhaust
duct area must be no less than 0 and must not exceed 0.3 inches (0.74 mb) of water
column (W.C.).
It is suggested that the ductwork from each dryer (minimum 14-inches [35.56 cm]) not exceed 20 feet (6.09
meters) with no more than three (3) elbows (including dryer connections and outside exhaust outlets). If the
ductwork exceeds 20 feet (6.09 meters) or has numerous elbows, the cross section area of the ductwork
mu t be increased in proportion to the length and number of elbows in it. In calculating duct si e, the cross
section area of a square or rectangular duct mu t be increased by twenty percent (20%) for each additional
20 feet (6.09 meters). The diameter of a round exhaust duct hould be increased ten percent (10%) for
each additional 15 feet (4.57 meters). Each 14-inch (35.56 cm) 90° elbow is equivalent to 30 feet (9.14
meters) and each 16-inch (40.64 cm) 90° elbow is equivalent to 36 feet (10.97 meters).

16 113267-1
IMPORTANT: For extended ductwork runs, the cross section area of the duct can only be increased
to an extent. Maximum proportional ductwork runs cannot exceed 20 feet (6.09
meters) more than the original limitations of 20 feet (6.09 meters) with two (2) elbows.
When the ductwork approaches the maximum limits as noted in this manual, a
professional heating, ventilating, and air-conditioning (HVAC) firm should be
consulted for proper venting information.
3. Multiple Dryer (Common) Venting
If it is not feasible to provide separate exhaust ducts for each dryer, ducts from individual dryers may be
channeled into a “common main duct.” The individual ducts should enter the bottom or side of the main duct
at an angle not more than 45° in the direction of airflow and hould be spaced at least 46-1/8” (117.16 cm)
apart. The main duct hould be tapered, with the diameter increasing before each individual 14-inch (35.56
cm) duct is added.
IMPORTANT: The dryer i not provided with a back draft damper. When exhausted into a multiple
(common) exhaust line, a back draft damper must be installed at each dryer duct.
IMPORTANT: No more than four (4) dryers should be connected to one (1) main common duct.
The main duct may be any shape or cross-sectional area, as long as the minimum cross section area is
provided. The illu tration on the following page shows the minimum cross-section area for multiple dryer
round or square venting. These figures mu t be increased 10 square inches (64.51 square centimeters)
when rectangular main ducting is used, and the ratio of duct width to depth hould not be greater than
3-1/2 to 1. These figures mu t be increased proportionally if the main duct run to the last dryer to where it
exhausts to the outdoors is unusually long (over 20 feet [6.09 meters]) or has numerous elbows (more than
two [2]) in it. In calculating ductwork si e, the cross-section area of a square or rectangular duct mu t be
increased twenty percent (20%) for each additional 20 feet (6.09 meters). The diameter of a round exhaust
mu t be increased ten percent (10%) for each additional 20 feet (6.09 meters). Each 90° elbow is equivalent
to an additional 15 feet (4.57 meters).