Continental Girbau CG50-60 User manual

For replacement parts, contact the distributor from which the dryer
was purchased or
ContinentalGirbau,Inc.®
2500State Road44
Oshkosh WI 54904
Telephone:[phone] / Fax:[phone]
www.cont-girbau.com
010201JEV/calbert CGIPartNo.A113301
CG50-60
(Gas DSI/Electric/Steam)
Installation Manual
WARNING: Foryoursafetytheinformationin
thismanual mustbe followedto minimizethe
riskof fireor explosionor topreventproperty
damage,personalinjury ordeath.
— Donot storeoruse gasolineor otherflammable
vapors and liquids in the vicinity of this or any
otherappliance.
— WHATTODO IFYOU SMELLGAS:
• Donottry tolight anyappliance.
• Donottouch anyelectricalswitch;do not
useanyphoneinyourbuilding.
• Cleartheroom, buildingorareaof all
occupants.
• Immediatelycallyourgassupplierfroma
neighbor’sphone. Follow thegas supplier’s
instructions.
• Ifyoucannot reachyour gassupplier, call
thefiredepartment.
— Installationand servicemust beperformedby a
qualified installer, service agency or the gas
supplier.
AVERTISSEMENT: Assurez-vous de bien
suivrelesinstructionsdonnéesdanscettenotice
pourréduire auminimum lerisqued’incendie
ou d’explosion ou pour éviter tout dommage
matériel,touteblessure oula 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.
— QUEFAIRESIVOUSSENTEZUNEODEUR
DEGAZ:
• Nepas tenterd’allumer d’appareils.
• Netouchez àaucun interrupteur. Nepas
vousservir destéléphonessetrouvant dans
lebâtiment.
• Évacuezlapièce, lebâtiment oulazone.
• Appelezimmédiatementvotrefournisseur
degazdepuisun voisin. Suivezles
instructionsdufournisseur.
• Sivousnepouvezrejoindre lefournisseur
degaz, appelezleservicedes incendies.
— L’installationetl’entretiendoiventêtreassuréspar
uninstallateurou unserviced’entretienqualifié
ouparle fournisseurdegaz.

Retain This Manual In ASafe Place For Future Reference
This product embodies 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.
CG50-60
“IMPORTANTNOTETOPURCHASER”
Informationmustbeobtainedfromyourlocalgassupplierontheinstructions
tobe followedif theusersmells gas. Theseinstructionsmustbeposted ina
prominentlocationnearthedryer.
We have tried to make this manual as complete as possible and hope you will find it useful. 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.
Important
For your convenience, log the following information:
DATEOFPURCHASE ____________________________ MODELNO. __________________________________________
DISTRIBUTOR’SNAME ___________________________________________________________________________________
Serial Number(s) ________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
Replacement parts can be obtained from your distributor or Continental Girbau, Inc.®Please specify the dryer model
number and serial number in addition to thedescription and part number, so that your order is processed accurately and
promptly.
FORYOURSAFETY
Donot storeor usegasoline or
otherflammablevaporsand
liquidsinthevicinityofthisor
anyotherappliance.
POURVOTRE SÉCURITÉ
Nepas entreposerniutiliser d’essence
nid’autresvapeursouliquides
inflammablesàproximitédecet
appareilou detoutautre appareil.

IMPORTANT
YOUMUSTDISCONTINUEANDLOCKOUTTHEELECTRICSUPPLYANDTHEGAS
SUPPLY OR THE STEAM SUPPLY BEFORE ANY COVERS OR GUARDS ARE
REMOVED FROM THE MACHINE TO ALLOW ACCESS FOR CLEANING,
ADJUSTING, INSTALLATION, OR TESTING OFANY EQUIPMENT PER OSHA
(OccupationalSafetyand HealthAdministration)STANDARDS.
CHILDRENSHOULDNOTBEALLOWEDTOPLAYONORNEARTHEDRYER(S).
WARNING
CHILDRENSHOULDBESUPERVISEDIFNEARDRYERSINOPERATION.
DRYERSSHOULDNEVERBELEFTUNATTENDEDWHILEINOPERATION.
CAUTION
FORYOURSAFETY
DONOTDRYMOPHEADSINTHEDRYER.
DONOTUSEDRYERINTHEPRESENCEOFDRYCLEANING FUMES.
WARNING
UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch,
or heat safety circuit ever be disabled.
“Caution: Label all wires prior to
disconnection when servicing controls. Wiring
errors can cause improper operation.”
«Attention: Lordesopérationsd’entretien
des commandes étiqueter tous fils avant
de les déconnecter. Toute erreur de
câblage peut étre une source de danger et
depanne.»

WARNING
The dryer must never be operated with any of the back guards, outer tops, or service
panelsremoved. PERSONALINJURYORFIRECOULDRESULT.
IMPORTANT
PLEASE OBSERVE ALL SAFETY PRECAUTIONS displayed on the equipment or
specified in the installation manual included with the dryer.
Dryersmustnotbeinstalled or stored in an area where it willbe exposed to water or weather.
The wiring diagram for the dryer is located in the front electrical control box area.
DRYERMUSTNEVERBEOPERATEDWITHOUTTHELINTFILTER(SCREEN)IN
PLACE,EVENIFANEXTERNALLINTCOLLECTIONSYSTEMISUSED.
WARNING

Table of Contents
SECTION I
IMPORTANT INFORMATION ...............................................................................3
A. ReceivingandHandling ............................................................................................................... 3
B. SafetyPrecautions ...................................................................................................................... 4
SECTION II
SPECIFICATIONS/COMPONENT IDENTIFICATION.....................................6
A. Specifications ............................................................................................................................. 6
B. ComponentIdentification ............................................................................................................ 8
SECTION III
INSTALLATION PROCEDURES .........................................................................10
A. LocationRequirements ............................................................................................................. 10
B. Unpacking/SettingUp ............................................................................................................... 11
C. DryerEnclosureRequirements .................................................................................................. 12
D. FreshAirSupplyRequirements ................................................................................................. 13
E. ExhaustRequirements ............................................................................................................... 14
F. ElectricalInformation ................................................................................................................ 19
G. GasInformation ........................................................................................................................ 26
H. SteamInformation .................................................................................................................... 30
I. PreparationFor Operation/Start-Up ......................................................................................... 35
J. PreoperationalTests ................................................................................................................. 36
K. PreoperationalInstructions ........................................................................................................ 38
L. ShutdownInstructions............................................................................................................... 38
SECTION IV
SERVICE/PARTS INFORMATION ......................................................................39
A. Service ..................................................................................................................................... 39
B. Parts ........................................................................................................................................ 39
SECTION V
WARRANTY INFORMATION...............................................................................40
A. Warranty .................................................................................................................................. 40
B. ReturningWarrantyParts .......................................................................................................... 40

SECTION VI
ROUTINE MAINTENANCE ..................................................................................41
A. Cleaning ................................................................................................................................... 41
B. Adjustments ............................................................................................................................. 42
C. Lubrication ............................................................................................................................... 42
D. LintDrawerRemoval................................................................................................................ 43
SECTION VII
TROUBLESHOOTING ...........................................................................................44
MicroprocessorController(Computer) Models .............................................................................. 44
DualTimerModels ......................................................................................................................... 50
SECTION VIII
DATA LABEL INFORMATION .............................................................................54
A. DataLabel ............................................................................................................................... 54
SECTION IX
REVERSING TIMER SPIN/DWELL ADJUSTMENTS.....................................56
SECTION X
PROCEDURE FOR FUNCTIONAL CHECK OF REPLACEMENT
COMPONENTS........................................................................................................57
SECTION XI
BURNER AND BASKET (TUMBLER)/LINT CHAMBER
MANUAL RESET HI-LIMIT INSTRUCTIONS..................................................59
GasModelsOnly ........................................................................................................................... 59
ElectricorSteam Models................................................................................................................ 60

3
SECTIONI
IMPORTANTINFORMATION
A. RECEIVINGAND HANDLING
The dryer is shipped in a protective stretch wrap cover with protective cardboard corners and top cover (or
optional box) as a means of preventing damage in transit. Upon delivery, the dryer and/or packaging, and
wooden skid should be visually inspected for shipping damage. If any damage whatsoever is noticed, inspect
further before delivering carrier leaves.
Dryers damaged in shipment:
1. ALL dryers should be inspected upon receipt and before they are signed for.
2. If there is suspected damage or actual damage, the trucker’s receipt should be so noted.
3. If the dryer is damaged beyond repair, it should be refused. Those dryers, which were not damaged in a
damaged shipment, should be accepted, but the number received and the number refused must be noted
on the receipt.
4. If you determine that the dryer was damaged after the trucker has left your location, you should call the
delivering carrier’s freight terminal immediately and file a claim. The freight company considers this
concealed damage. This type of freight claim is very difficult to get paid and becomes extremely difficult
when more than a day or two passes after the freight was delivered. It is your responsibility to file freight
claims. Dryer/parts damaged in transit cannot be claimed under warranty.
5. Freight claims are the responsibility of the consignee, and ALL claims must be filed at the receiving end.
The manufacturer assumes no responsibility for freight claims or damages.
6. If you need assistance in handling the situation, please contact the Continental Girbau, Inc.®Traffic
Manager at [phone] Ext. 16.
IMPORTANT: Thedryer mustbetransported andhandledin anuprightposition atALLtimes.

4
B. SAFETY PRECAUTIONS
WARNING: Foryoursafety,the informationinthis manualmustbefollowedto minimizetherisk of
fireorexplosionor topreventproperty damage,personalinjury,or lossoflife.
WARNING: The dryermustnever beoperatedwith anyofthe backguards,outer tops,or
servicepanelsremoved. PERSONALINJURYOR FIRECOULD 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 ALLoccupants.
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 the manufacturer 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 onlywater washedfabrics. DO NOTdry articlesspotted orwashed indry
cleaningsolvents,acombustible detergent, or“all purpose”cleaner.
EXPLOSIONCOULDRESULT.
WARNING: DONOTdry ragsorarticles coatedorcontaminated withgasoline, kerosene,oil,paint,
orwax.
EXPLOSIONCOULDRESULT.
WARNING: DONOTdry mopheads. Contaminationby waxorflammable solventswillcreate a
firehazard.
WARNING: DO NOTuseheat fordrying articlesthatcontain plastic,foam,sponge rubber, or
similarlytexturedrubberlikematerials. Dryingina heatedbasket(tumbler)may damage
plasticsor rubberand maybea firehazard.

5
7. A program shouldbeestablished 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 collectionof lintinthe burnerareaandexhaust ductworkcancreatea potential
firehazard.
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: Failureto dosowillVOIDTHEWARRANTY.
9. UNDER NO CIRCUMSTANCES should the dryer door switches, lint drawer switch, or heat safety
circuit ever be disabled.
WARNING: PERSONALINJURYORFIRE COULDRESULT.
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: Articlesleft inthedryerafterthe dryingandcoolingcycleshave beencompletedcan
createafire hazard.
12. READ AND FOLLOW ALL CAUTION AND DIRECTION LABELS ATTACHED TO THE
DRYER.
WARNING: YOUMUSTDISCONTINUEANDLOCKOUTTHE ELECTRICSUPPLY
ANDTHEGAS SUPPLYOR STEAMSUPPLYBEFOREANYCOVERSOR
GUARDSAREREMOVEDFROMTHE MACHINETOALLOWACCESS
FORCLEANING,ADJUSTING,INSTALLATION,ORTESTINGOFANY
EQUIPMENTPEROSHA(Occupational Safetyand HealthAdministration)
STANDARDS.
13. For safety, proper operation, and optimum performance, the dryer must not be operated with a load less
than 66% of its rated capacity.
14. DO NOT operate steam dryers with more than 125 PSI (8.6 bar) steam pressure. Excessive steam
pressure can damage steam coil and/or harm personnel.
15. Replace leaking flexible hoses or other steam fixtures immediately. DO NOT operate the dryer with
leaking flexible hoses. PERSONAL INJURY MAY RESULT.
16. The normal PH level for copper type steam coils must be maintained between a value of 8.5 to 9.5. For
steel type steam coils the PH level must be maintained between a value of 9.5 to 10.5. These limits are set
to limit the acid attack of the steam coils.
IMPORTANT: Coilfailureduetoimproper PHlevel willVOIDTHEWARRANTY.

6
SECTIONII
SPECIFICATIONS/COMPONENTIDENTIFICATION
A. SPECIFICATIONS
* CG50-60 1-phase (1ø) dryers use a 3/4 HP (0.56 kw) motor. CG50-60 3-phase (3ø) non-reversing dryers use a 1/2 HP (0.37
kw) motor. ALL CG50-60 reversing dryers are supplied with two (2) 3-phase (3ø) motors standard: a 1/2 HP(0.37 kw) blower
motor and a 1/2 HP (0.37 kw) drive motor.
** Ductwork size varies with installation conditions. Exhaust static pressure must be no less than 0 and must not exceed
0.3 inches (0.74 mb) water column (W.C.).
*** Size of piping to dryer varies with installation conditions. Contact factory for assistance.
**** Contact factory for electrical information not listed. 3-phase (3ø) figures shown are for 3-wire service.
***** Specify steam air-operated or electromechanical steam damper system when ordering. Air-operated steam damper must be
provided with a clean, dry, regulated 80 PSI +/- 10 PSI (5.51 bar +/- 0.69 bar) air supply.
NOTE: Themanufacturerreservestheright tomakechanges inspecificationsat anytimewithout
noticeorobligation.
STEAM***** GAS
ELECTRIC
Shaded areas are stated in metric equivalents
BASKET (TUMBLER) DIAMETER 32-3/4” 83.2 cm
BASKET (TUMBLER) DEPTH 37-1/2” 95.3 cm
BASKET (TUMBLER) MOTOR* 3/4 HP 0.56 kw
DOOR OPENING (DIAMETER) 21-1/2” 54.6 cm
BASKET (TUMBLER) VOLUME 18.3 cu.ft. 0.518 cu.m.
EXHAUST CONNECTION (DIAMETER)** 8” 20.32 cm
AIRFLOW 750 cfm 21.2 cmm
VOLTAGE AVAILABLE 120-460v 1, 3ø 3w, 4w 50/60 Hz
APPROX. NET WEIGHT 651 lbs 295.3 kg
APPROX. SHIPPING WEIGHT 700 lbs 317.5 kg
HEAT INPUT 150,000 btu/hr 37,800 kcal/hr
INLET PIPE CONNECTION*** 1/2” M.P.T.
OVEN SIZE
KW BTU/HR
60
H Z
KCAL/HR
50
H Z
24 81,900 20,640
30 102,400 25,800
APPLIED VOLTAGE/PHASE/APPROX. AMP DRAW****
KW 208/1Ø 240/1Ø 208/3Ø 240/3Ø 380/3Ø 416/3Ø 460/3Ø
60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz 50/60 Hz 60 Hz 50 Hz 60 Hz 50 Hz 60 Hz 50 Hz
24 ---- 69 -61 --- 35 32 -
30 ---- 86 -76 --- 44 40 -
VOLTAGE AVAILABLE 120-460v 1, 3ø 3w, 4w 50/60 Hz
APPROX. NET WEIGHT 683 lbs 309.8 kg
APPROX. SHIPPING WEIGHT 733 lbs 332.5 kg
COMPRESSED AIR VOLUME 0.75 cfh 0.02 cmh
COMPRESSED AIR CONNECTION 1/8” F.P.T.
STEAM CONSUMPTION
BOILER HP
NORMAL
LOAD
205 lbs/hr 92.98 kg/hr 6
OPERATING STEAM PRESSURE SUPPLY CONNECTION
*** RETURN CONNECTION ***
125 PSI max 8.6 bar 1” F.P.T. 1” F.P.T.

7
Specifications
CG50-60
(Gas/Electric/Steam)
NOTE: Themanufacturerreservestheright tomakechanges inspecificationsat anytimewithout
noticeorobligation.

8
B. COMPONENT IDENTIFICATION
1. Dryer Front View
Illus. No. Description
1 Controls
2 Control (top access) Door Assembly
3 Main Door Assembly
4 Lint CompartmentArea (lint drawer)
5 Data Label and Installation Label
(located behind the upper left side panel area behind the top control [access] door)

9
2. Dryer Rear View
Illus. No. Description
1 Heating Unit
2 Electric Service Relay Box
3 Basket (tumbler) Bearing MountAssembly
4 Idler Bearing MountAssembly
5 Blower MotorAssembly (for reversing models Only)
6 Leveling Legs (rear)
7 Basket (tumbler) (drive) MotorAssembly
8 Dryer Exhaust

10
SECTIONIII
INSTALLATIONPROCEDURES
Installation should be performed by competent technicians in accordance with local and state codes. In the
absence of these codes, the installation mustconform to applicableAmerican National Standards:ANSI Z223.1-
LATEST EDITION (National Fuel Gas Code) orANSI/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 CSAC22.1-1990 or LATESTEDITION
(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: “Thedryermustbeinstalledon noncombustiblefloorsonly.”
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 D).
5. Clearance provisions mustbe made from combustible construction as noted in this manual (refer to Dryer
Enclosure Requirements in Section C).
6. Provisions must be made for adequate clearances for servicing and for operation as noted in this manual
(refer to Dryer Enclosure Requirements in Section C).
7. Dryer must be exhausted to the outdoors as noted in this manual (refer to Exhaust Requirements in
Section E).
8. 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 E).
IMPORTANT: Dryershouldbe locatedwherea minimumamountof exhaustductwillbe necessary.
9. The dryer must be installed with a proper exhaust duct connection to the outside.

11
10. The dryer must be installed with provisions for adequate combustion and make-up air supply.
CAUTION: Thisdryer producescombustiblelint andmustbeexhaustedto theoutdoors. Every 6
months,inspecttheexhaustductingand removeanylint buildup.
B. UNPACKING/SETTING UP
Remove protective shipping material (i.e., plastic wrap and/or optional shipping box) from dryer.
IMPORTANT: Dryermustbetransportedand handledinan uprightposition atALLtimes.
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) bolts securing the base of the dryer to the wooden skid. Two (2) are
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) bolts located in the lint chamber area, remove the lint door.
1. Leveling Dryer
The dryer is equipped with four (4) leveling legs, one (1) at each corner of the base. Two (2) are located
at the rear of the dryer base, and two (2) are located in the lint chamber (coop). To increase bearing life
and improve efficiency, the dryer should be tilted slightly to the rear.

12
C. DRYER ENCLOSURE REQUIREMENTS
Bulkheads and partitions should be made of noncombustible materials and must be located a minimum of
12-inches (30.48 cm) (18-inches [45.72 cm] or more is recommended for ease of installation, maintenance, and
service) above the dryer’s outer top, except along the front of the dryer which may be partially closed in if
desired. The clearance between the bulkhead header and the dryer must 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 front. The bulkhead facing must not be
closed in ALL the way to the top of the dryer. A 1-inch (2.54 cm) clearance is required.
NOTE: Allowancesmustbemadefor theopeningof thecontrol door.
Dryers may be positioned sidewall to sidewall. However, a 1/16” (1.5875 mm) minimum allowance must be
made for the opening and closing of the control door and the lint door. It is suggested that the dryer be positioned
about 2 feet (0.61 meters) away from the nearest obstruction for ease of installation, maintenance, and service
(to be measured from the back guard). Refer to the illustration above for details.
NOTE: Airconsiderationsare importantforproperand efficientoperation.
IMPORTANT: Eventhoughaminimum ofonly 12-inches(30.48cm) isrequired, 18-inches
(45.72cm) ormoreis suggested. Theadditionalclearanceis advantageousfor
easeofinstallationandservice.
IMPORTANT: Whenfiresprinkler systemsare locatedabovethedryers, aminimum of18-inches
(45.72cm) abovethedryer console(module) isrequired. Dryersmay bepositioned
sidewalltosidewallhowever,a1/16”(1.5875mm)minimumallowance isrequired
betweendryers(or wall)foreaseof installationandmaintenance. Allowancesmust
bemade fortheopening andclosingof thecontroldoor andthelintdoor.

13
D. 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 mustbe continually replenished from the outdoors. If the
make-up air is inadequate, drying time and drying efficiency will be adversely affected. Ignition problems and
sail switch “fluttering” problems may result, as well as premature motor failure from overheating.
Air supply (make-up air) must be given careful consideration to assure proper performance of each dryer. An
unrestricted source of air is necessary for each dryer. An airflow of 750 cfm (cubic feet per minute) (21.24
cmm [cubic meters per minute]) must be supplied to each dryer. As a general rule, an unrestricted air entrance
from the outdoors (atmosphere) of a minimum of 1-1/2 square feet (0.14 square meters) is required for each
dryer. The dryer must be installed with provisions for adequate combustion and make-up air supply.
To compensate for the use of registers or louvers used over the openings, this make-up air 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.
EXAMPLE: For a bank of four (4) dryers, two (2) unrestricted openings measuring 2 feet by 1-1/2 feet (0.61
meters by 0.46 meters) (6 square feet [0.56 square meters]) are acceptable.
Allowances must be made for remote or constricting passageways or where dryers are located at excessive
altitudes or predominantly low pressure areas.
IMPORTANT: Make-upairmust beprovided fromasource freeofdry cleaningsolventfumes.
Make-upairthatiscontaminatedbydry cleaningsolventfumeswill resultin
irreparabledamage tothemotors andotherdryer components.
NOTE: Componentfailureduetodry cleaningsolventfumes willVOIDTHEWARRANTY.

14
E. EXHAUST REQUIREMENTS
1. General Exhaust Ductwork Information
Exhaust ductwork shouldbedesigned 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. Minimum diameter of ductwork must be at least 8-inches (20.32 cm). The dryer
must be installed with a proper exhaust duct connection to the outside
CAUTION: Thisdryer producescombustiblelint andmustbeexhaustedtothe outdoors.
CAUTION: DRYER MUSTBEEXHAUSTEDTOTHEOUTDOORS.
CAUTION: IMPROPERLYSIZED ORINSTALLEDEXHAUSTDUCTWORK CAN
CREATEAPOTENTIALFIREHAZARD.
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. Single or independent dryer venting is recommended.
HorizontalVenting:
When a single 8-inch (20.32 cm) horizontal vent is used, the ductwork from the dryer to the outside outlet
cannot exceed 25 feet (7.62 meters). This calculation of 25 feet (7.62 meters) compensates or allows for
the use of a maximum of only one (1) elbow (which is the outside protection). If more elbows are added,
or the length of the ductwork increased, then the size of the ductwork must be increased as well. In the
case of multiple (common) dryer venting, the distance from the last dryer to the outside exhaust outlet
must not exceed 15 feet (4.57 meters). 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 90° turns be avoided; use 30° and/or 45°
angles instead. The radius of the elbows should preferably be 1-1/2 times the diameter of the duct.
Including 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.
Vertical Venting:
When a single 8-inch (20.32 cm) vertical vent is used, the ductwork from the dryer to the outside outlet
cannot exceed 15 feet (4.57 meters). This calculation of 15 feet (4.57 meters) compensates or allows for
the use of a maximum of only three (3) elbows (which includes dryer connection elbow and the outside
protection). If more elbows are added, or the length of the ductwork increased, then the size of the
ductwork must be increased as well. In the case of multiple (common) dryer venting, the distance from
the last dryer to the outside exhaust outlet must not exceed 15 feet (4.57 meters). The shape of the
ductwork is not so critical so long as the minimum cross-sectional area is provided. It is suggested that the
use of 90º turns be avoided; use 30º and/or 45º bends instead. The radius of the elbows should preferably
be 1-1/2 times the diameter of the duct. 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.

15
ALLductwork joints must be taped to prevent moisture and lint from escaping into the building. Inspection
doors shouldbe installed at strategic points in the exhaust ductwork for periodic inspection and cleaning of
lint from the ductwork.
IMPORTANT: Exhaustback pressuremeasured byamanometer intheexhaustductmustbe noless
than 0 and mustnot exceed0.3 inches (0.74 mb) of water column (W.C.).
NOTE: Whentheexhaust ductworkpassesthrougha wall,ceiling, orroofmadeof combustible
materials,the openingmustbe2-inches (5.08cm)larger thantheduct (alltheway around).
Theductmustbecentered withinthisopening.
IMPORTANT: Itis recommendedthatexhaustor boosterfans notbe usedinthe exhaustductwork
system.
a. Outside Ductwork Protection
1) To protect the outside end of the horizontal ductwork from the weather, a 90° elbow bent 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 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: DONOTuse screens,louvers, orcapson theoutside openingof theexhaust
ductwork.
2. Single Dryer Venting
When possible, it is suggested to provide a separate exhaust duct for each dryer. The exhaust duct 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. It is suggested that the use of 90° turns in the ducting be avoided; use 30° and/or 45° angles
instead. The shape of the exhaust ductwork is not critical so long as the minimum cross section area is
provided.
IMPORTANT: Exhaustback pressuremeasured byamanometer intheexhaustductmustbe noless
than 0 and mustnotexceed0.3inches (0.74mb) ofwater column.

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IMPORTANT: Forextended ductworkruns, thecross sectionarea ofthe ductworkcanonly be
increasedtoan extent. Whentheductworkapproaches themaximum limitsnotedin
thismanual,aprofessionalheating,venting,andairconditioning (HVAC) firmshould
beconsultedforproperventinginformation.
ALLductwork should besmooth 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.
NOTE: Whentheexhaust ductworkpassesthrougha wall,ceiling, orroofmadeof combustible
materials,the openingmustbe2-inches (5.08cm)larger thantheduct (alltheway around).
Theductmustbecenteredwithin thisopening.
a. Outside Ductwork Protection
1) To protect the outside end of the horizontal ductwork from the weather, a 90° elbow bent 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 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: DONOT usescreens, louvers,or capson theoutside openingof theexhaust
ductwork.