IPSO DR75 User manual

Shown with manual double
timer control system
Technical specifications
Installationinstructions
Operating instructions
Maintenance
IPSO - USA
3101 South Haven Highway 77, Suite A
Panama City, FL, 32405
Phone: [phone]
OWNER'S MANUAL
75 lb. DR LAUNDRY DRYER
DR75
- USA
THIS MANUAL MUST BE GIVEN TO THE EQUIPMENT OWNER
MAN DR2075 (ECN ) 9/99 D0568

Page 2
IMPORTANT NOTICES—PLEASE READ
For optimum efficiency and safety, we recommend that you read the Manual before operating the equipment.
Store this manual in a file or binder and keep for future reference.
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.
- Do not store or use gasoline or other flammable liquids or vapors in the
vicinity of this or any other appliance.
- WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliances.
• Do not touch any electrical switch; do not use any phone in your building.
• Clear the room, building, or area of all occupants.
• Immediately call your gas supplier from a neighbor's phone. Follow the
gas supplier's instructions.
• If you cannot reach the gas supplier, call the fire department.
Installation and service must be performed by a qualified installer, service
agency or the gas supplier.
WARNING: In the event the user smells gas odor, instructions on what to do must be
posted in a prominent location. This information can be obtained from the local gas
supplier.
WARNING: Wear Safety Shoes to prevent injuries.
WARNING: Purchaser must post the following notice in a prominent location:
FOR YOUR SAFETY
Do not store or use gasoline or other flammable vapors
and liquids in the vicinity of this or any other appliance.
WARNING: A clothes dryer produces combustible lint and should be exhausted
outside the building. The dryer and the area around the dryer should be kept free of
lint.
WARNING: Be safe, before servicing machine, the main power should be shut off.

Page 3
ATTENTION: L’ACHETEUR DOIT PLACER L’AVERTISSEMENT
SUIVANT DANS UN ENDROIT CLAIR ET VISIBLE:
ATTENTION: L’ACHETEUR DOIT PLACER L’AVERTISSEMENT
SUIVANT DANS UN ENDROIT CLAIR ET VISIBLE:
AVERTISSEMENT. Assurez-vous de bien
suivre les instructions donnees dans cette
notice pour reduire au minimum le risque
d’incendie ou d’explosion ou pour eviter tuot
dommage materiel, toute blessure ou la mort.
__ Ne pas entreposer ni utiliser d’essence ni
d’autresvapeursouliquidesinflammablesdans
le voisinage de cet appareil ou de tout autre
apparell.
__ QUE FAIRE SI VOUS SENTEZ UNE
ODEUR DE GAZ:
•Ne pas tenter d’allumer d’apparell.
• Ne touchez a aucun interrupteur. Ne pas
vous servir des telephones se trouvant dans
le batiment ou vous vous trouvez.
• Evacuez la piece, le batiment ou la zone.
•Appelez immediatement votre fournisseur de
gaz depuis un voisin. Suivez les instructions
du fournisseur.
•Si vous ne pouvez rejoindre le fournisseur
de gaz, appelez le service des incendies.
__ l’installation et l’entretien doivent etre assures
par un installateur ou un service d’entretien
qualifie ou par le fournisseur de gaz.
POUR VOTRE SECURITE
Ne pas entreposer ni utiliser d’ essence
ni d’autres vapeurs ou liquides
inflammablesdanslevoisinagedecet
appareil ou de tout autre appareil.

Page 4
WARNING: To avoid fire hazard, do not dry articles containing foam rubber or similar texture
materials. Do not put into this dryer flammable items such as baby bed mattresses, throw rugs,
undergarments (brassieres, etc.) and other items which use rubber as padding or backing. Rubber
easily oxidizes causing excessive heat and possible fire. These items should be air dried.
WARNING: Synthetic solvent fumes from drycleaning machines create acids when drawn through the
dryer. These fumes cause rusting of painted parts, pitting of bright or plated parts, and completely
removes the zinc from galvanized parts, such as the tumbler basket. If drycleaning machines are in the
same area as the tumbler, the tumbler's make-up air must come from a source free of solvent fumes.
WARNING: Do not operate without guards in place.
WARNING: Check the lint trap often and clean as needed but at least a minimum of once per day.
WARNING: Alterations to equipment may not be carried out without consulting with the factory and
only by a qualified engineer or technician. Only Manufacturer’s parts may be used.
WARNING: Remove clothes from dryer as soon as it stops. This keeps wrinkles from setting in and
reduces the possibility of spontaneous combustion.
WARNING: Be Safe - shut main electrical power and gas supply off externally before attempting
service.
WARNING: Never use drycleaning solvents, gasoline, kerosene, or other flammable liquids in the dryer.
FIRE AND EXPLOSION WILL OCCUR. NEVER PUT FABRICS TREATED WITH THESE
LIQUIDS INTO THE DRYER. NEVER USE THESE LIQUIDS NEAR THE DRYER..
WARNING: Do not place items exposed to cooking oils in your dryer. Items contaminated
with cooking oils may contribute to a chemical reaction that could cause a load to catch fire.
WARNING: Never let children play near or operate the dryer. Serious injury could occur if a child
should crawl inside and the dryer is turned on.
WARNING: Never tumble fiberglass materials in the dryer unless the labels say they are machine
dryable. Glass fibers break and can remain in the dryer. These fibers cause skin irritation if they
become mixed with other fabrics.
WARNING: Before operating gas ignition system - purge air from natural gas or propane gas lines
per manufacturer’s instructions.
WARNING: To reduce the risk of electric shock, disconnect this appliance from the power supply
before attempting any user maintenance other than cleaning the lint trap. Turning the controls to the
OFF position does not disconnect this appliance from the power supply.

Page 5
IPSO DRYER WARRANTY
IPSO warrants all new equipment (and the original parts thereof) to be free from defects in material or workmanship for
a period of two (2) years from the date of sale thereof to an original purchaser for use, except as hereinafter provided. With
respect to non-durable parts normally requiring replacement in less than two (2) years due to normal wear and tear, and with
respect to all new repair or replacement parts for IPSO equipment for which the two (2) year warranty period has expired,
or for all new repair or replacement parts for equipment other than IPSO equipment, the warranty period is limited to ninety
(90) days from date of sale. The warranty period on each new replacement part furnished by IPSO in fulfillment of the
warranty on new equipment or parts shall be for the unexpired portion of the original warranty period on the part replaced.
With respect to electric motors, coin meters and other accessories furnished with the new equipment, but not manufactured
by IPSO, the warranty is limited to that provided by the respective manufacturer.
IPSO’s total liability arising out of the manufacture and sale of new equipment and parts, whether under the warranty or
caused by IPSO’s negligence or otherwise, shall be limited to IPSO-USA repairing or replacing, at its option, any defective
equipment or part returned f.o.b. IPSO’s factory, transportation prepaid, within the applicable warranty period and found
by IPSO to have been defective, and in no event shall IPSO be liable for damages of any kind, whether for any injury to
personsorpropertyorforanyspecialorconsequentialdamages.TheliabilityofIPSOdoesnotincludefurnishing(orpaying
for) any labor such as that required to service, remove or install; to diagnose troubles; to adjust, remove or replace defective
equipment or a part; nor does it include any responsibility for transportation expense which is involved therein.
The warranty of IPSO is contingent upon installation and use of its equipment under normal operating conditions. The
warranty is void on equipment or parts; that have been subjected to misuse, accident, or negligent damage; operated under
loads, pressures, speeds, electrical connections, plumbing, or conditions other than those specified by IPSO; operated or
repaired with other than genuine IPSO replacement parts; damaged by fire, flood, vandalism, or such other causes beyond
the control of IPSO; altered or repaired in any way that effects the reliability or detracts from its performance, or; which
have had the identification plate, or serial number, altered, defaced, or removed.
No defective equipment or part may be returned to IPSO for repair or replacement without prior written authorization from
IPSO. Charges for unauthorized repairs will not be accepted or paid by IPSO.
IPSO MAKES NO OTHER EXPRESSED OR IMPLIED WARRANTY, STATUTORY OR OTHERWISE,
CONCERNING THE EQUIPMENT OR PARTS INCLUDING, WITHOUT LIMITATION, A WARRANTY OF
FITNESS FOR A PARTICULAR PURPOSE, OR A WARRANTY OF MERCHANTABILITY. THE
WARRANTIES GIVEN ABOVE ARE EXPRESSLY IN LIEU OF ALL OTHER WARRANTIES,
EXPRESSED OR IMPLIED. IPSO NEITHER ASSUMES, NOR AUTHORIZES ANY PERSON TO ASSUME
FOR IT, ANY OTHER WARRANTY OR LIABILITY IN CONNECTION WITH THE MANUFACTURE, USE
OR SALE OF ITS EQUIPMENT OR PARTS.
Forwarranty service, contactthedistributor from whom theIPSO equipment or partwaspurchased. If thedistributorcannot
be reached, contact IPSO.
IDENTIFICATION NAMEPLATE
The identification nameplate is located on the rear wall of the dryer. It contains the dryer serial number, product number, model
number, electrical specifications and other important data that may be needed when servicing and ordering parts, wiring diagrams,
etc. Do not remove this nameplate.

Page 6
Contents
Safety Instructions .............................................................................. 2-4
Cissell Dryer Warranty ........................................................................ 5
Table of Contents ................................................................................ 6
Symbols ............................................................................................... 7
Unpacking / General Installation .......................................................8-9
Technical Data and Dimensions ........................................................10-11
Electric Connections .......................................................................... 12
Gas Connections ................................................................................ 13
Gas Piping Installation ....................................................................... 14-15
Gas service Installation Instructions ................................................ 16
Gas Pipe Size Chart ............................................................................ 17
Dryer Installation with Multiple Exhaust ...........................................18-19
Dryer Make-Up Air Requirements ...................................................... 20
Dryer Installation with Separate Exhaust ......................................... 21
Exhaust and Venting .......................................................................... 22
Rules for Safe Operation of Dryer ..................................................... 23
Direct-Spark Ignition Operation ......................................................... 24-25
General Maintenance ..........................................................................26-27
Operating Instruction for Double Timer ........................................... 28
PARTS .................................................................................................. 29-43
Front View ................................ 29
Front Panel Assembly ............ 31
Wire Box Assembly ................. 33
Lint Door Assembly ................35
Rear View ................................. 37
Basket Bearings/Sheave Assy 39
Idler Assembly .........................41
Gas Heating Unit Assembly ...43
Control Door Assembly ..........30
Thermostat Assembly ............. 32
Door Assembly ........................34
Basket & Spider Assembly .....36
Air Switch Assembly............... 38
Motor & Fan Assembly ...........40
Rear Control Panel Assembly 42

Page 7
Rotation in two directions
Rotation dans les deux sens
Drehbewigung in zwei
Richtungen
Movimiento rotativo en los
dos sentidos
Caution
Attention
Achtung
Atencion; precaucion
Direction of rotation
Sens de mouvement continu
De rotation Drehbewegung
in Pfeilrichtung movimiento
Giratorio o rotatorio en el
sentido de la flecha
The following symbols are used in this manual and/or on the machine. The numbers between ()
refer to the numbers on the machine surveys.
NOTE!
On
Marche
Ein
Conectado
Off
Arrêt
Aus
Desconectado
Hot! Do Not Touch
Heiß! Nicht Beruhren
Haute temperature! Ne pas
toucher
Caliente! no tocar
Start
Demarrage
Start
Arranque de un
movimiento
Emission of heat in general
Emission de chaleur en
general
Warmeabgabe allgemein
Emisión de calor
Cooling
Refroidissement
Kühlen
Enfriamiento
dangerous voltage
tension dangereuse
Gefährliche elektrische
Spannung
tension peligrosa End of Cycle
DescriptionSymbol
SYMBOLS
Symbol

Page 8
Unpacking/General Installation (All Dryers)
Upon arrival of the equipment, any damage in shipment
should be reported to the carrier immediately.
Upon locating permanent location of a unit, care should be
taken in movement and placement of equipment.
See outline clearance diagrams for correct dimensions.
Remove all packing material such as: tape, manuals, skid,
etc
Leveling: Use spirit level on top of dryer. Adjust leveling
bolts on dryer (see adjustable leveling bolts in maintenance
section).
Check voltage and amperes on rating plate before
installing the dryer.
The construction of the dryers permits installation side-by-
side to save space or to provide a wall arrangement.
Position dryer for the least amount of exhaust piping and
elbows, and allow free access to the rear of dryer for future
servicing of belts, pulleys and motors. Installation
clearance from all combustable material is 0” ceiling
clearance, 0” rear clearance, and 0” side clearance.
Before operating dryer, open basket door and remove
blocking between front panel and basket. Read the
instruction tags, owner’s manual, warnings, etc.
IMPORTANT
Opening the clothes loading door deactivates the
door switch to shut off the motors, fan, gas, steam,
or electric element. To restart the dryer, close
the door and press in the push to start button.
IMPORTANT
This dryer is designed for a capacity maximum
load. Overloading it will result in long drying
times and damp spots on some clothes.
IMPORTANT
Maximum operating efficiency is dependent upon
proper air curculation. The lint screen must be
kept cleaned daily to insure proper air circulation
throughout the dryer.
IMPORTANT
Provide adequate clearance for air opening into
the combustion chamber.
UNPACKING
GENERAL
INSTALLATION
(ALL DRYERS)

Page 9
Unpacking/General Installation (All Dryers)
The dryer is so designed that when an operator opens the
dryer door, the basket and exhaust fan stop. You can
expect fast drying from a laundry dryer. Hot, dry air is
properly and effectively moved through the basket and
exhausted through a lint trap to the atmosphere. The
dryer comes equipped with an inclined self-cleaning lint
screen. In this system, lint accumulates on the underside
of the screen until a blanket of lint will fall from the
screen to the bottom of the dryer cabinet, and should be
removed daily or as required, to prevent an over-
accumulation.
IMPORTANT
Provide adequate clearance for air openings into
the combustion chamber.
Permanent press, durable press and other modern day
fabrics require the care that your laundry dryers now
provide. At the end of the drying cycle, a timed “Cool-
Down” control automatically takes over and continues the
rotation of the fan and basket without heat until the
garment load reaches a safe cool temperature. This
function is performed at the end of each drying cycle and
continues for two minutes.
Replacement parts for this dryer are available from your
distributor or by contracting the factory at the address or
phone number printed on the cover page of this manual.
GENERAL
INFORMATION
DRYER
“COOL-DOWN”
CYCLE
REPLACEMENT
PARTS

Page 10
75 lb. Dryer Dimensions - Standard Gas
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Page 11
DR75 Dryer Dimensions - Gas
(Illustration)
38.97“ (990 mm)
75.19“ (1910 mm)
33.07“ (840 mm)
5
3
.
34“(13
55 mm
)
14
.
7
9
.
1“(230
mm
)
9.25“(235 mm)
7.87“(200 mm)
13“(330 mm)
EXHAUST
16.33“(415 mm)
9.1“(230 mm)
ELECTRIC
BOX CON.
Electric
Inlet
Steam Conn.
Gas Conn.
Steam Ret.
10.82“(275 mm)
9.84“(250 mm)
4.96“(126 mm)
8.5“(215 mm)
Connection

Page 12
Electric connection
The connection needs to be made in the wiring box at the back. Remove the
coverplate (G) in order to reach the connection clamps.
The connection cable needs to be brought in through the swivel (H) on the side of
the wiring box.
It is necessary to ground the dryer for your personal safety and to ensure a good
operation.
115 and 208-240 V - 1 ph
The mains wires (Ll) and (L2) should be connected to the 2 left clamps and the
yellow/green grounding wire (PE) should be connected to the grounding clamp.
208-240 and 480 V - 3 ph
The 3mains wires(L1),(L2) and(L3)should be connected to the 3 left clamps and
the yellow/green grounding wire (PE) should be connected to the grounding
clamp.
380-415V - 3 ph
The 3 mains wires (L1), (L2) and (L3) should be connected to the 3 left clamps,
the blue neutral (N) should be connected to the right clamp and the yellow/green
grounding wire (PE) should be connected to the grounding clamp.
G
H
Dryers must be electrically grounded by a separate #14 or larger green wire from the grounding
terminal within the Service Connection Box, to a cold water pipe. In all cases, the grounding method must
comply with local electrical code requirements; or in the absence of local codes, with the National
Electrical Code, ANSI/NFPA No. 70 or the Canadian Electrical Code, CA C22.1.
See wiring diagram furnished with dryer. Do not change wiring without consulting the factory, as you
may void the factory warranty. DO NOT CONNECT THE DRYER TO ANY VOLTAGE OR
CURRENT OTHER THAN THAT SPECIFIED ON THE DRYER RATING PLATE. (Wiring diagram
is located on rear wall of dryer.)
All panels must be in position before operation of dryer.
115 and 208-240 V - 1 ph
208-240 and 480 V - 3 ph
380-415V - 3 ph
N
L3
L2
L1
«Attention. Lors des opérations d’entretien
des commandes, ètiqueter tous les fils avant
de les dèconnecter. Toute erreur de câblage
peut être une source de danger et de panne»

Page 13
The gas supply pipe should be connected to the gas tap (I), which is on the right next
to the wiring box on the back.
It is very important to have the connections done by a qualified technician, in order
to make sure that the installation is effected in accordance with the prevailing
standards and instructions.
Thedryershouldbeconnectedtothetypeofgas, which is indicated on the serial plate.
The use of too small gas pipes can result in unsufficient gas supply, which can lead
to a bad heating-up and a poor drying quality.
Whenthedryerisusedincombinationwithaweighingplatform,thegassupplypipe
has to be made of flexible material to allow the weighing system to keep moving
freely.
I
It is important to work with the right gas pressure (see technical remarks) in order to
obtain a good ignition, heating and consequently a good operation in general.
After the gas supply has been connected, the gas tap in the dryer should beturned on
(clockwise).
Test all clutches and connections for possible leaks by means of a soap
solution, but never with a flame.
Gas connection

Page 14
Gas Piping Installation
1. The installation must conform with local codes, or in
the absence of local codes with the National Fuel
Gas Code, ANSI Z223.1 or the CAN/CGA-B149,
Installation Codes.
2. Check Identification Nameplate for type of gas for
dryer.
3. Check for altitude elevation of dryer.
4. Check with utilities company for proper gas
pressure and gas supply line.
5. Natural Gas Only—Check the gas pressure inlet
supply to dryer, 11 inches water column (27.4 mbar)
maximum. Manifold Pressure—3.5 inches water
column (8.8 mbar) pressure.
6. L.P. Gas Only—Manifold pressure—13 inches water
column (32.4 mbar) maximum.
CAUTION: Low gas pressure and intermittent
gas will cause gas ignition problems and
inadequate drying of laundry.
GAS PIPING
INSTALLATION

Page 15
Gas Piping Installation (Illustrations)
The dryer and it’s individual shutoff valve 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 (.04 bar).
The dryer must be isolated from the gas supply piping system by closing it's
individual manual shutoff valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psig (.04 bar).

Page 16
The size of the gas service pipe is dependant upon many
variables, such as tees, lengths, etc. Specific pipe size
should be obtained from the gas supplier. Refer to the “Gas
Pipe Size” chart in this manual for general gas pipe size
information.
CAUTION: Gas loop piping must be installed as
illustrated to maintain equal gas pressure for all
dryers connected to a single gas service
Other gas-using appliances should be connected
upstream from the loop.
WARNING:
LIQUIFIED PETROLEUM GASES ONLY !
A Gas Pressure Regulator for Liquified Petroleum Gases is
not furnished on Gas Heated Clothes Dryers. This
regulator is normally furnished by the installer. In
accordance with American Gas Association (AGA)
standards, a gas pressure regulator, when installed
indoors, must be equipped with a vent limiter or a vent
line must be installed from the gas pressure regulator vent
to the outdoors.
Gas Service Installation Instructions
GAS SERVICE
INSTALLATION
INSTRUCTIONS
GAS PRESSURE
REGULATOR FOR
LIQUIFIED
PETROLEUM GASES

Page 17
Gas Pipe Size Chart
TOTAL BTU/HR
(for LP Gas correct
total BTU/HR below by
multiplying by .6)
TOTAL
KCAL
HOUR
GAS PIPE SIZE FOR 1000 BTU (250 KCAL) NATURAL GAS
AT 7” (17.5 MBAR) W.C. PRESSURE
In figuring total length of pipe, make allowance for tees and elbows.
(150 ft.)
45,72 m
(125 ft.)
38,1 m
(100 ft.)
30,48 m
(75 ft.)
22,86 m
(50 ft.)
15,24 m
(25 ft.)
7,62 m
60,000
80,000
100,000
120,000
140,000
160,000
180,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1,400,000
1,500,000
1,600,000
1,700,000
1,800,000
1,900,000
2,000,000
2,200,000
2,400,000
2,600,000
2,800,000
3,000,000
3,200,000
3,400,000
3,600,000
3,800,000
4,000,000
15000
20000
25200
30200
35200
40300
45300
50400
75600
100800
126000
151200
176400
202000
230000
250000
270000
300000
330000
350000
380000
400000
430000
450000
480000
504000
550000
605000
650000
705000
750000
806000
850000
907000
960000
1000000
3/4
3/4
3/4
3/4
3/4
3/4
1
1
1
1 1/4
1 1/4
1 1/2
1 1/2
1 1/2
2
2
2
2
2
2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3/4
3/4
3/4
1
1
1
1
1
1 1/4
1 1/4
1 1/2
1 1/2
2
2
2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3 1/2
3 1/2
3 1/2
3 1/2
3/4
3/4
1
1
1
1
1
1 1/4
1 1/4
1 1/2
1 1/2
2
2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3/4
1
1
1
1
1 1/4
1 1/4
1 1/4
1 1/2
1 1/2
2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
4
4
3/4
1
1
1
1
1 1/4
1 1/4
1 1/4
1 1/2
1 1/2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
4
4
4
4
3/4
1
1
1
1 1/4
1 1/4
1 1/4
1 1/2
1 1/2
2
2
2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
2 1/2
3
3
3
3
3
3
3
3 1/2
3 1/2
3 1/2
3 1/2
3 1/2
4
4
4
4
4
4

Page 18
Dryer Installation With Multiple Exhaust
For Exhaust Duct less than 14 feet (5 m) and 2
elbows equivalent and less than 0.3 inches (8 mm)
static pressure.
DRYER EXHAUSTS
Area of section “A-A” must be equal to the sum of dryer exhaust pipes
entering multiple exhaust pipe. (See chart below.)
DR75
No. of Dryers
Duct Diameter
(in inches)
(in CM)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
8 1214161820222324262728293031323334353637383940
20 30 25 41 46 51 56 58 61 66 68 71 73 76 78 81 84 86 89 91 94 97 99 100
_ _ _ _
_ _ _ _
_ _ _ _
_ _ _ _
_ _ _ _
_ _ _ _
Exhaust
Booster Fan
Power Supply
to Fan
Relay Coils
Start and Stop
Switches on
Dryers

Page 19
Dryer Installation with Multiple Exhaust
For Exhaust Duct more than 14 feet (5 m) and 2 elbows
equivalent and more than 0.3 inches (8 mm) static pressure.
(See illustration on page 21.)
1. Make-up air from outside building may enter enclosure from
top or side walls. (See Dryer Make-Up Air Requirements
Chart)
2. Use constant diameter duct with area equal to the sum of
dryer duct areas.
EXAMPLE: Six 8 inch (204 mm) diameter duct = one
19.6 inch (498 mm) diameter duct in area. Use 20 inch
(508 mm) diameter duct or diameter to match tube-axial fan.
3. Enclosure (plenum) with service door. This separates the
dryer air from room comfort air. If dryers use room air instead
of outside air, the heat loss can be another 25 Btu/hr
(6.3 kcal/hr) for each cubic foot per minute (cfm) used.
4. Zero inches clearance to combustible material allowed on sides
and at points within 4 inches (102 mm) of front on top.
5. Heat loss into laundry room from dryer fronts only is about
60 Btu/hr per square foot (15 kcal/hr per 0.1m²).
6. Flange mounted, belt driven tube-axial fan. Fan must run
when one or more dryers are running. See suggested
Automatic Electrical Control Wiring Diagram on previous
page. Must meet local electrical codes. Fan air flow (cfm)
(m³/min.) is equal to sum of dryer air flows, but static pressure
(SP) is dependent on length of pipe and number of elbows.
7. Barometric Bypass Damper—Adjust to closed flutter
position with all dryers and exhaust fan running. Must be
located within enclosure.
CAUTION: Never install hot water heaters or other gas
appliances in the same room as dryers. Never install
cooling exhaust fans in the same room as dryers.
CAUTION: Never exhaust dryers with other types of
equipment.
DRYER INSTALLATION
WITH MULTIPLE
EXHAUST

Page 20
Suggested Minimum Dryer Make-up Air Requirements
Dryer Dryer Pocket Maximum Air Flow Duct Size For Required Make-up
Model Capacity Rate per Pocket Service Connection Air Area per Pocket
lb kg cfm m3/h inch mm sq. inch cm2
C 30 30 13.6 700 1190 8 203 135 871
C 30 E/S 30 13.6 400 680 6 153 77 497
C 30 ST 30 13.6 450 765 6 153 87 561
C 50 50 22.7 800 1360 8 203 154 994
C 50 E/S 50 22.7 450 765 6 153 87 561
C 75 75 34 1000 1700 8 203 192 1239
C 75 E/S 75 34 536 911 6 153 103 665
C 75 ST 75 34 1000 1700 12 305 192 1239
HD80 80 36.3 1465 2490 10 254 282 1819
C 110 110 50 2200 3740 12 305 422 2723
C 110 E/S 110 50 850 1445 8 203 163 1052
C 125 125 56.7 2000 3400 12 305 384 2477
C 150 150 68 2250 3825 12 305 432 2787
HD175 175 79.4 2780 4726 12 305 534 3445
HD190 190 86.2 3000 5100 12 305 576 3716
WMC/HD20 20 9.1 450 765 6 153 87 561
WMC/HD30 30 13.6 625 1063 8 203 120 774
WMC/HD50 50 22.7 700 1190 8 203 135 871
WMC/HD75 75 34 750 1275 8 203 144 929
Notes:
1) The Model C 30 ST has 2 pockets per dryer, each pocket has the above listed characteristics;
each pocket is exhausted separately with a 6" (153mm) duct.
2) The Model C 75 ST has 2 pockets per dryer, each pocket has the above listed characteristics;
both pockets have one 8" (203mm) exhaust manifolded into one 12" (305mm) exhaust duct for
exhaust connection.
3) For the C 30 ST and the C 75 ST Models, the Required Make-up Air Area shown in the table
should be doubled since it is shown per pocket,only.
4) E/S indicates an Energy Saving Model.