Dexter Laundry B-Series User manual

8514-265-001 REV C PAGE 1
INDUSTRIAL DRYER
MODEL T-20X2 AND T-30X2 ON-PREMISE
B-SERIES CONTROL, ELECTRIC-HEATED
OPERATOR’S MANUAL
INSTALLATION & OPERATION INSTRUCTIONS
The dryer ust not be stored or installed where it will be exposed to water and/or weather and is
suitable for use in roo te peratures between 40F and 105F (5C and 45C.)
Post the following “For Your Safety” caution in a pro inent location:
FOR YOUR SAFETY
Do not store or use gasoline or other flamma le vapors or liquids in the vicinity of this or any
other appliance or machine.
It is important that you read this Manual and retain it for future reference. For service or
replacement parts, contact the Dexter Distri utor in your area or the manufacturer.
WARNING / Avertissement
WARNING– Risk of Fire / Avertissement: Risque d’incendie
Clothes dryer installation must e performed y a qualified installer. / L’installation de la
sécheuse doit être effectuée par un spécialiste qualifié.
Install the clothes dryer according to the manufacturer’s instructions and local codes.
Do not install a clothes dryer with flexi le plastic venting materials. If flexi le metal (foil type)
duct is installed, use duct that has een investigated and found accepta le for use with clothes
dryers. Flexi le venting materials are known to collapse, e easily crushed, and trap lint.
These conditions will o struct clothes dryer airflow and increase the risk of fire. / Ne pas
installer une sécheuse avec des matériaux de ventilation en plastique. Dans le cas où un
conduit en métal flexi le (du genre à feuille) est installé, il doit être d’un type spécifique
identifié par le fa ricant de l’appareil comme accepta le pour les sécheuses. Les matériaux de
ventilation flexi les sont réputés pour s’aplatir, se déformer facilement et collecter de la
peluche. Ces conditions vont o struer l’écoulement d’air de la sécheuse et augmenter le risque
d’incendie.
To reduce the risk of severe injury or death, follow all installation instructions. / Pour réduire le
risque de lessures graves ou mortelles, suivre toutes les instructions d’installation.
Save these instructions. / Garder les instructions.
Dexter Laundry, Inc.
2211 West Grimes Avenue
Fairfield, Iowa 52556

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TABLE OF CONTENTS
Page No.
Warnings a out use and operation 2
Dryer Specifications 3
Dryer Dimensions 6
Installation Instructions 12
Dryer Shutdown 17
Description of Dryer Control 18
Dryer Fault Codes 19
Operating Instructions 23
Programming the Dryer Control 24
Servicing and Trou leshooting 30
Preventative Maintenance Instructions 31
WARNINGS ABOUT USE AND OPERATION
DO NOT MODIFY THIS APPLIANCE. KEEP SHIELDS, GUARDS, AND COVERS IN PLACE. These
safety devices are provided to protect everyone from injury.
It is ABSOLUTELY ESSENTIAL that the dryer e grounded to a known earth (zero) ground in accordance
with local codes or, in the a sence of local codes, with the latest editions of the National Electric Code, ANSI//NFPA
70 or Standard CSA C22.1 Canadian Electrical Code Part 1. This is not only for personal safety, ut is necessary
for proper operation of the controller. Failure to do so will void the warranty of the controller.
THIS DRYER IS EQUIPPED WITH AN OVER-TEMPERATURE THERMOSTAT located a ove the
motor on the side of the exhaust duct. If the dryer ceases to operate, refer to your “Service Procedure and Parts
Data” ook for instructions.
CHECK THIS THERMOSTAT WHEN INSTALLING DRYER to assure it is not tripped. Impacts such as
rough handling in shipment, may trip the thermostat. It may e reset y inserting a wooden pencil or dowel
through the ushing in the cover.
DO NOT SPRAY AEROSOLS IN THE VICINITY OF THIS APPLIANCE while in operation.
THIS APPLIANCE SHALL NOT BE USED TO DRY OFF SOLVENTS OR DRY-CLEANING FLUIDS.

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SPECIFICATIONS
20 lb. (9.1kg) Industrial Dryer: T-20X2
DN20X2E_-(82/84/85/86/87)_B_
Ca inet Height 68 1/2” 1740 mm.
(Assumes minimum leveling leg adjustment)
Ca inet Width 27” 686 mm.
Ca inet Depth 44 5/8” 1133 mm.
Floor to Bottom of Door- Bottom Dryer 8 1/2” 216 mm.
Floor to Bottom of Door- Top Dryer 42” 1067 mm.
Door Opening 18 1/8” 460 mm.
Dry Wt. Capacity 20 x 2 l s. 9.1 x 2 kg.
Cylinder Diameter 25 1/2” 648 mm.
Cylinder Depth 24” 610 mm.
Cylinder Volume 7.0 cu. ft. 198 liters
Lint Screen Area 285 sq. in. 1839 sq. cm.
Exhaust Size 8” 203 mm.
Make-up Air 1.0 sq. ft. 929 sq. cm.
Example: 1.0 sq. ft = 1 ft. long X 1 ft. wide
Motor Size (per dryer) 1/3 H.P. .248 kW
Airflow (per dryer - 50 hz) 300 CFM 8.5 m^3/min
Electrical Specifications – Model -82
Voltage/Hz/Phase 400V/50Hz/3Phase/15kW Heat
Running Amps 30 Amps
Minimum Dual Element Time Delay Fuse 30 Amp
Wire Size 8.5 mm^2
Electrical Service 4 wire + ground
Electrical Specifications – Model -84
Voltage/Hz/Phase 208V/60Hz/3Phase/15kW Heat
Running Amps 55 Amps
Minimum Dual Element Time Delay Fuse 60 Amp
Wire Size #4
Electrical Service 4 wire + ground
Electrical Specifications – Model -85
Voltage/Hz/Phase 240V/60Hz/3Phase/15kW Heat
Running Amps 50 Amps
Minimum Dual Element Time Delay Fuse 50 Amp
Wire Size #4
Electrical Service 4 wire + ground
Electrical Specifications – Model -86
Voltage/Hz/Phase 208V/60Hz/1Phase/16kW Heat
Running Amps 100 Amps
Minimum Dual Element Time Delay Fuse 100 Amp
Wire Size #1
Electrical Service 3 wire + ground
Electrical Specifications – Model -87
Voltage/Hz/Phase 240V/60Hz/1Phase/16kW Heat
Running Amps 85 Amps
Minimum Dual Element Time Delay Fuse 90 Amp
Wire Size #2
Electrical Service 3 wire + ground

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Shipping Weight 650 l s. 295 kg.
Net Weight 615 l s. 279 kg.
Clearance Behind Machines (min.) 18” 457 mm.

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SPECIFICATIONS
30 lb. Industrial Stack Dryer: T-30X2
DN30X2E_-(71/74/77/78)EB_X
Ca inet Height 76 1/4” 1937 mm.
(Assumes minimum leveling leg adjustment)
Ca inet Width 31 1/2” 800 mm.
Ca inet Depth 49 1/2” 1257 mm.
Floor to Bottom of Door- Bottom Dryer 7 5/8” 194 mm.
Floor to Bottom of Door- Top Dryer 45 1/4” 1149 mm.
Door Opening 22 5/8” 575 mm.
Dry Wt. Capacity 30 x 2 l s. 13.6 x 2 kg.
Cylinder Diameter 30” 762 mm.
Cylinder Depth 27 1/2” 699 mm.
Cylinder Volume 11.25 cu. ft. 319 liters
Lint Screen Area 453 sq. in. 2923 sq. cm.
Exhaust Size 8” 203 mm.
Make-up Air 1.5 sq. ft. 1394 sq. cm.
Example: 1.5 sq. ft = 1 ft. long X 1.5 ft. wide
Motor Size 1/2 H.P. .373 kW
Airflow (60 hz) 600 CFM 17.0 m^3/min
Electrical Specifications – Model -71
Voltage/Hz/Phase 208V/60Hz/3Phase/24kW Heat
Running Amps 85
Minimum Dual Element Time Delay Fuse 90 Amp
Wire Size #2
Electrical Service 4 wire + ground
Electrical Specifications – Model -74
Voltage/Hz/Phase 240V/60Hz/3Phase/24kW Heat
Running Amps 75
Minimum Dual Element Time Delay Fuse 80 Amp
Wire Size #3
Electrical Service 4 wire + ground
Electrical Specifications – Model -77
Voltage/Hz/Phase 120&208V/60Hz/1Phase/20kW Heat
Running Amps 120
Minimum Dual Element Time Delay Fuse 125 Amp
Wire Size (1/0)
Electrical Service 3 wire + ground
Electrical Specifications – Model -78
Voltage/Hz/Phase 120&240V/60Hz/1Phase/20kW Heat
Running Amps 105
Minimum Dual Element Time Delay Fuse 110 Amp
Wire Size (1/0)
Electrical Service 3 wire + ground
Shipping Weight 750 l s. 340 kg.
Net Weight 699 l s. 317 kg.
Clearance Behind Machines (min.) 18” 457 mm.

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T-20X2 DRYER DIMENSIONS- FIGURE 1A

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T-20X2 DRYER DIMENSIONS- FIGURE 1B

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T-20X2 DRYER DIMENSIONS- FIGURE 1C

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T-30X2 DRYER DIMENSIONS- FIGURE 1A

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T-30X2 DRYER DIMENSIONS- FIGURE 1B

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T-30X2 DRYER DIMENSIONS- FIGURE 1C

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INSTALLATION INSTRUCTIONS
UNCRATING AND PLACING DRYER
Tools Required: 3/4" (19 mm) hex socket & ratchet driver, wood lock 4" (100 mm) or 5" (125 mm) thick, a knife
and a groove joint pliers, which will open to 1 3/8" (35 mm).
1. Remove and discard packaging.
2. The crate ase is attached to the dryer y (4) cap screws driven upward from elow the crate ase. Remove
crate ase from dryer, y tipping dryer sidewise and place lock under crate ase rail in center of dryer.
Using a ratchet and 3/4" hex socket, remove and discard (2) crating olts from side, which is raised.
Remove lock from under crate ase. Repeat for other side. Save the olts for use if the dryer is ever
moved again.
3. With a walking motion move dryer completely off crate ase. Save the crate ase for use if the dryer is
ever moved again.
4. Slide unit into position where it will e installed. Adjust leveling legs, using the groove joint pliers, to level and
align dryer with adjacent units.
Note: If the dryer is ever moved again, the dryer should e re-mounted on its crate ase and its crating olts re-
inserted and tightened, in the reverse order as a ove.
DRYER INSTALLATION
1. CODE CONFORMITY: All commercial dryer installations must conform to the local and national codes for
the location of installation.
2. INSTALLATION CLEARANCES: This unit may e installed at the following alcove clearances:
I. Left Side 0"
II. Right Side 0"
III. Back 18" (457 mm) (Certified for 6" (150 mm) clearance; however, 18" (457 mm) clearance is
necessary ehind the motors to allow servicing and maintenance.)
IV. Front 48" (1220 mm) (to allow use of dryer)
V. Top Refer to figure la eled “Vertical Clearance Dimensions”.
AB. Certification allows 0" clearance at the top 4" (100 mm) ack from the front.
However, a 1/4" (6 mm) clearance should e allowed in case the dryer needs to e
moved.
C. A 10" (250 mm) clearance is required from top at all other points.
VI. Floor If used as a stand-alone dryer, this unit is intended to e installed upon an elevated
surface. The surface must e of suita le strength to support 450 pounds (205 kg),
and the dryer should e olted or anchored to prevent horizontal movement. This
unit may e installed upon a com usti le floor.
Do not o struct the flow of com ustion and ventilation air.
Maintain minimum of 1" (25 mm) clearance etween duct and com usti le material.
Refer to the la el attached to the Belt Guard on the rear of the dryer for other installation information and
start-up instructions.

8514-265-001 REV C PAGE 13
FIGURE 2 - VERTICAL CLEARANCE DIMENSIONS
3. MAKE-UP AIR: Adequate make-up air must e supplied to replace air exhausted y dryers on all types of
installations. Refer to specifications for the minimum amount of make-up air opening to outside for each dryer.
This is a net requirement of effective area. Screens, grills or louvers, which will restrict the flow of air, must e
considered. Consult the supplier to determine the free area equivalent for the grill eing used. The source of
make-up air should e located sufficiently away from the dryers to allow an even airflow to the air intakes
of all dryers. Multiple openings should e provided.
4. ELECTRICAL REQUIREMENTS: The electrical installation must e performed y a qualified electrical
technician.
The electrical power requirements necessary to operate the unit satisfactorily are listed on the serial plate
located on the ack panel of each dryer. The electrical connection should e made at the terminal locks
in the control ox on the rear of the unit using conductors rated at 75 C (167 F) and a wire size adequate
to handle the amperage and voltage listed on the serial plate (see ta le elow for recommended
minimum sizes). It is a solutely necessary that the dryer e grounded to a known (earth) ground (No. 8
AWG copper conductor recommended). Knock-outs are provided for the connection of 1 inch conduit for
the power supply conductors and 3/8 inch conduit for the external grounding conductor.

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T-20X2 MODELS:
HEATING
ELEMENT SIZE
(kW)
SUPPLY VOLTAGE
(PHASE / V.)
MINIMUM DUAL ELEMENT
TIME DELAY FUSE SIZE AT
FUSED DISCONNECT (A.)
MINIMUM WIRE SIZE FROM FUSED
DISCONNECT TO DRYER TERMINAL
BLOCK (75
O
C COPPER WIRE)
15
3 / 208
/ 60 hz
60
#4
15
3 / 240 / 60 hz
50
#4
16 1 / 208 / 60 hz 100 #1
16 1 / 240 / 60 hz 90 #2
15
3 / 400 / 50 hz
30
8.4 mm2
T-30X2 MODELS:
HEATING
ELEMENT SIZE
(kW)
SUPPLY VOLTAGE
(PHASE / V.)
MINIMUM DUAL ELEMENT
TIME DELAY FUSE SIZE AT
FUSED DISCONNECT (A.)
MINIMUM WIRE SIZE FROM FUSED
DISCONNECT TO DRYER TERMINAL
BLOCK (75
O
C COPPER WIRE)
20 1 / 208 125 (1/0)
20
1 / 240
110
(
1/0
)
24
3 / 208
90
# 2
24
3 / 240
80
# 3
For 240V power supplies, an earthed mid-point of a phase is required. The “high” leg of the 3-phase
electrical supply (delta) must e connected to terminal L3. A neutral is required for all electrical supply
variations, see the wiring diagram affixed to the elt guard on the ack of the dryer.
The installation must meet the electrical requirements of the country, state and locality of the installation.
The installer may e required to provide a disconnect switch which will interrupt all lines. It may e a
local or national requirement to provide an electrical interruption switch visi le and accessi le from the
room in which the dryer is installed. The wiring diagram is located on the elt guard on the ack of the
dryer.

8514-265-001 REV C PAGE 15
IMPORTANT: TRANSIENT VOLTAGE SURGE SUPPRESSORS
Like most electrical equipment, your new machine can e damaged or have its life shortened y voltage
surges due to lightning strikes which are not covered y factory warranty. Local power distri ution
pro lems also can e detrimental to the life of electrical components. We recommend the installation of
transient voltage surge suppressors for your new equipment. These devices may e placed at the power
supply panel for the complete installation and don’t require an individual device for each machine.
These surge protectors help to protect equipment from large spikes and also from small ongoing spikes in
the power that occur on a day to day asis. These smaller surges can shorten overall life of electrical
components of all types and cause their failure at a later date. Although they can’t protect against all
events, these protective devices have a good reputation for significantly lengthening the useful life of
electronic components. Electronic components are helped to have a longer useful life when they are
supplied with the clean sta le electrical power they like.
We are including the following names and phone num ers of a few suppliers of these devices for those
who don’t currently have a source.
MANUFACTURER CONTACT PHONE
Innovative Technology, Inc (Eaton) Factory 1-800-647-8877 or www.itvss.com
EFI Electronics Corporation Factory 1-800-877-1174 or www.efinet.com
(Schneider Electric) Distri utor – Surge Pro 1-877-233-0153
MCG Surge Protection Factory 1-800-851-1508 or www.mcgsurge.com
Advanced Protection Technologies Inc. Factory 1-800-237-4567 or www.aptsurge.com

8514-265-001 REV C PAGE 16
4. EXHAUST INSTALLATION. (Refer to Figure 3) Exhausting of the dryer(s) should e planned and
constructed so that no air restrictions occur. Any restriction due to pipe size or type of installation can
cause slow drying time, excessive heat, and lint in the room.
From an operational standpoint, incorrect or inadequate exhausting can cause a cycling of the high limit
thermostat, which shuts off the heating elements and results in inefficient drying.
The exhaust duct connection near the top of the dryer will accept an 8 in. (200 mm) round duct.
Individual exhausting of the dryers is recommended. A pipe of the proper diameter should e attached
to the dryer adapter collar and extended out through an outside wall to exhaust all heat, moisture, and
lint outside. This pipe must e very smooth on the inside, as rough surfaces tend to collect lint, which
will eventually clog the duct and prevent the dryer from exhausting properly. All el ows must e smooth
on the inside. All joints must e made so the exhaust end of one pipe is inside the next one
downstream. Do not assem le pipe or el ows with screws or other fastening means that will extend in to
the pipe or el ows and catch lint. The addition of an exhaust pipe tends to reduce the amount of air the
lower can exhaust. This does not affect the dryer operation if held within practical limits. For the most
efficient operation, it is recommended that no more than 14 ft. (4.25 m) of straight 8 in. (204 mm)
diameter pipe is used with two right angle el ows. When more than two el ows are used, 2 ft. (610
mm) of straight pipe should e removed for each additional el ow. No more than four right angle el ows
should e used to exhaust a dryer.
Maintain a minimum of 1” (25mm) clearance etween duct and com usti le material.
If the exhaust pipe passes through a wall, a metal sleeve of slightly larger diameter should e set in the
wall and the exhaust pipe passed through this sleeve. This practice is required y some local codes and is
recommended in all cases to protect the wall.
This type of installation should have a means provided to prevent rain and high winds from entering the
exhaust when the dryer is not in use. A hood with a hinged damper can e used for this purpose.
Another method would e to point the outlet end of the pipe downward to prevent entrance of wind
and rain. In either case, the outlet should e kept clear, y at least 24 in. (610 mm) of any o jects,
which would cause air restriction.
Never install a protective screen over the exhaust outlet.
When exhausting a dryer straight up through a roof, the overall length of the duct has the same limits as
exhausting through a wall. A rain cap must e placed on top of the exhaust and must e of such a type
as to e free from clogging. The type using a cone shaped “roof” over the pipe is suita le for this
application.
Exhausting the dryer into a chimney or under a uilding is not permitted. In either case there is a danger
of lint uildup, which can e highly com usti le.
Installation of several dryers, where a main discharge duct is necessary, will need the following
considerations for installation (see Figure 3). Individual 6” (152 mm) exhaust ducts from each dryer
should enter main discharge duct at a 45-degree angle in the direction of discharge airflow.
NOTE: Never install the individual ducts at a right angle into the main discharge duct.
The individual ducts from the dryers can enter at the sides or ottom of the main discharge
duct. Figure 3 indicates the various round main duct diameters to use with the individual
dryer ducts. The main duct can e rectangular or round, provided adequate airflow is
maintained. The total exhausting (main discharge duct plus duct outlet from the dryer)
should not exceed the equivalent of 14 ft. (4.25 m) and two el ows. The diameter of the
main discharge duct at the last dryer must e maintained to exhaust end.
NOTE: A small diameter duct will restrict airflow; a large diameter duct will reduce air
velocity - oth contri uting to lint uild up. An inspection door should e provided for
periodic clean out of the main duct.

8514-265-001 REV C PAGE 17
DRYER SHUTDOWN
To render the dryer inoperative, disconnect electrical supply to the dryer.
IT IS RECOMMENDED THAT THE INSTALLER TEST THE DRYER FOR OPERATION AND INSTRUCT THE
USER BEFORE LEAVING THE INSTALLATION.
Caution - A clothes dryer produces com usti le lint and should e
exhausted outdoors. The area around the clothes dryer should e kept
free of lint.

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DRYER CONTROLLER FACTORY DEFAULT PROGRAM SETTINGS
DRY
CYCLE
COOL DOWN
TIME
(MINUTES)
TOTAL CYCLE
TIME
(MINUTES)
DRYING
TEMPERATURE
(
0
F) (
0
C)
DRYER LOAD
1 5 35 180 82 Towels, pads, heavy cotton
2 2 20 170 77 Sheets, lended materials
3 5 25 180 82 Cotton
4 2 20 130 54 Synthetic materials
5
2
25
175
79
Blended materials
DRYER FAULT CODES
FAULT
#
FAULT
DESCRIPTION ACTION
F1
Shorted
thermostat
sensor.
Dryer stops and “F1” flashes on the 4-digit display.
When short circuit on sensor input is removed, “LOAd”
appears on the 4-digit display and the remaining dry
time is reset.
F2 Open thermostat
sensor.
Dryer stops and “F2” flashes on the 4-digit display.
When a good sensor is connected to sensor input,
“LOAd” appears on the 4-digit display and the remaining
dry time is reset.
F3 EEPROM
corrupted.
Dryer will not start and “F3” appears on the 4-digit
display. The power to the dryer must e cycled to reset
the controller. Fault should only occur when starting a
dry cycle.
F4 Heating element
on fault.
The drying temperature did not increase 1
º
F. in 15
minutes. “F4” will flash on the display and the dry cycle
will finish without calling for heat (energizing element
contactor). Opening the door or pressing the STOP key
will reset the fault and clear the remaining time in the
dry cycle.
F5 Temperature
fault.
The drying temperature is at least 25
º
F. a ove the
temperature setting. “F5” will flash on the 4-digit display
and the dry cycle will finish without calling for heat
(energizing the element contactor). The power to the
dryer must e cycled to reset the controller.

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TOUCH PAD DESCRIPTION
INDICATOR LIGHTS (L.E.D.s)
Description
Cycle (1 through 5) These L.E.D.s are on solid when a particular cycle is chosen
for operation or programming.
Heating Elements This L.E.D. is part of the 4-digit numeric display and will e
on solid during the drying part of a cycle when the heating
elements do not need to e on. The L.E.D. will e linking
when the heating elements need to e on. The L.E.D. will
not e on solid or linking (off) if the cycle is stopped,
complete, in cool down, or terminated.
Programming These L.E.D.s are on solid as they are selected during the
programming of the dryer controller.
Stop This L.E.D. is on solid when either the STOP utton is
pressed once or the door is opened during an operating
cycle.
SWITCHES (Pushbuttons)
Description
This touch pad switch will increment (increase) dry time,
cool down time, and drying temperature. It will also scroll
upwards when selecting a dry cycle.
Up/Increase
This touch pad switch will decrement (decrease) dry time,
cool down time and drying temperature. It will also scroll
downwards when selecting a dry cycle.
Down/Decrease
This touch pad switch allows the dryer controller to enter the
permanent programming mode.
Program
This touch pad switch will select one of the three varia le
parts of the dry cycle (dry time, temperature, or cool down)
y sequencing through them. Once one of the varia le parts
of the dry cycle is chosen and changed, this touch pad
switch will enter the new (changed) value into the dry
Select/Enter cycle program.