Duke 59-E3L Guide

Installation, Operation,
Parts & Maintenance Manual
P/N 523513
Rev B 02/11/2021
ELECTRIC HALF-SIZE CONVECTION OVEN
LITTLE CAESARS
MODEL
59-E3L
This manual is Copyright © 2021 Duke Manufacturing Co. All rights reserved.
Reproduction without written permission is prohibited. Duke is a registered
trademark of the Duke Manufacturing Co.
CAUTION: Please read this manual completely before attempting
to install, operate or service this equipment
WARNING for CA residents: go to www.dukemfg.com/prop65 for prop 65 warning

Electric Half-Size
Convection Oven Manual
2
TABLE OF CONTENTS
Important Safety Instructions.......................................................................................................................................2-3
Pre-Installation Instructions ..............................................................................................................................................4
A. Qualied Personnel............................................................................................................................................4
B. Delivery & Inspection.........................................................................................................................................4
59-E3L Electrical Specications........................................................................................................................................5
Wiring Diagram......................................................................................................................................................................6
Installation Instructions ......................................................................................................................................................7
C. Location of Oven.................................................................................................................................................7
D. Electrical Connections.......................................................................................................................................7
E. Ventilation ..............................................................................................................................................................7
F. Electric Oven Assembly .....................................................................................................................................7
G. Adjustments Associated with Installation .................................................................................................8
Control Panel...........................................................................................................................................................................9
Operation .............................................................................................................................................................................. 10
A. Program Parameters ....................................................................................................................................... 10
B. Programming Instructions............................................................................................................................ 10
C. Operation of Oven........................................................................................................................................... 11
D. Cool Down Operation .................................................................................................................................... 12
Cleaning the Oven ............................................................................................................................................................. 13
Maintenance Instructions ............................................................................................................................................... 14
A. Adjustments....................................................................................................................................................... 14
B. Door Adjustments............................................................................................................................................ 14
C. Lubrication ......................................................................................................................................................... 14
D. Calibration Check............................................................................................................................................. 14
Trouble Shooting................................................................................................................................................................ 15
Repair Parts List and Corresponding Drawings.................................................................................................16-19
IMPORTANT SAFETY INSTRUCTIONS
Throughout this manual, you will nd the following safety words and symbols that signify
important safety risks with regards to operating or maintaining the equipment.
Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
Indicates a hazardous situation which, if not avoided, could
result in minor or moderate injury.
Indicates Important Information
Indicates electrical shock hazard which, if not avoided, could
result in death or serious injury and/or equipment damage.
Indicates hot surface which, if not avoided, could result in
minor or moderate injury.
Never steam clean or hose down with water. Electric
component will fail due to moisture.

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Electric Half-Size
Convection Oven Manual
In addition to the warnings and cautions in this manual, use the following guidelines for
safe operation of the unit.
• Read all instructions before using equipment.
• For your safety, the equipment is furnished with a properly grounded cord connector. Do
not attempt to remove or disconnect the grounded connector.
• Install or locate the equipment only for its intended use as described in this manual.
• Do not use corrosive chemicals on this equipment.
• Do not operate this equipment if it has a damaged cord or plug, if it is not working
properly, or if it has been damaged or dropped.
• This equipment should be serviced by qualied personnel only. Contact the nearest
Duke authorized service facility for adjustment or repair.
• Do not block or cover any openings on the unit.
• Do not immerse cord or plug in water.
• Keep cord away from heated surfaces.
• Do not allow cord to hang over edge of table or counter.
The following warnings and cautions appear throughout this manual and should be
carefully observed.
• Turn the unit o, disconnect the power source and allow unit to cool down before
performing any service or maintenance on the unit.
• The procedures in this manual may include the use of chemical products. You must read
the Material Safety Data Sheets before using any of these products.
• The unit should be grounded according to local electrical codes to prevent the
possibility of electrical shock. It requires a grounded receptacle with dedicated electrical
lines, protected by fuses or circuit breaker of the proper rating, in accordance with all
applicable regulations.
• Disposal of the unit must be in accordance with local environmental codes and/or any
other applicable codes.
• This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning use of the appliance
by a person responsible for their safety.
• Do not store gasoline or other ammable liquids in the vicinity of this appliance.
• Improper installation, adjustment, service or maintenance can cause property damage,
injury or death. Read all installation, operating and maintenance instructions thoroughly
before installing or servicing this appliance.
IMPORTANT SAFETY INSTRUCTIONS

Electric Half-Size
Convection Oven Manual
4
QUALIFIED PERSONNEL
These installation instructions are for the use of qualied installation and service personnel only.
Installation or service by other than qualied personnel may result in damage to the oven and/or injury to
the operator.
Qualied installation personnel are those individuals, rms, companies or corporations which either in
person or through an agent are engaged in and responsible for:
• The installation of electrical wiring from the electric meter, main control box or service outlet to the
electrical appliance. Qualied installation personnel must be familiar with all precautions required and
have complied with all requirements of state and local authorities having jurisdiction. See: National
Electrical code, ANSI/NFPA 70-1990.
PREINSTALLATION INSTRUCTIONS
DELIVERY AND INSPECTION
Duke Manufacturing Co., does everything within its power to insure you receive your oven in good
condition. They are strapped down on heavy wooden skids and surrounded by heavy “tri-wall” cartons
to prevent shipping damage. They have all been carefully inspected before they were packaged and
consigned to the carrier.
Upon Delivery of your Duke oven:
• Look over the shipping container carefully noting any exterior damage on the delivery receipt which
must also be signed by the driver/delivery person.
• Un-crate and check for any damage which was not evident on the outside of the shipping container.
This is called concealed damage. The carrier must be notied within fteen (15) days of the delivery of
the oven and the carton, skid and all packaging materials must be retained for inspection.
Duke Manufacturing Co. cannot assume liability for loss or damage suered in transit. The carrier assumes
full responsibility for delivery in good order when the shipment was accepted. However, we are prepared to
assist you in ling any freight claim.

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Electric Half-Size
Convection Oven Manual
SPECIFICATIONS
Model
Depth Width Height Cube
ft.
crat-
ed
Weight
in. cm in. cm in. cm lbs. kg
59-E3 27.0 68.6 48 121.9 68.25 173.4 24.3 265 120.5
DIMENSIONS: Freight Class: 85
Electrical Specications - Per Section
208V
Amps
240V
Amps
KW
3 Phase 24.0 21.0 8.0
▲Electronic connection point
POWER SUPPLY CONNECTIONS
L
1
L
2
L
3
153213
Plug,
Ground
GROUND WIRES
SOURCE
WIRES
Block, Terminal 4 Pole
L1 & L2 (1PHASE)
L1, L2 & L3 (3PHASE)
14 1
2
"
12 1
8
"
2 1
8
"
48"
36"
25 3
4
"
4 3
4
"
68 1
4
"
42 1
8
"

Electric Half-Size
Convection Oven Manual
6
B
D
1
2
3
4
B
D
1
2
3
4
Centrifugal Switch
1-SPEED
CONV.
BLO WER
MOTOR
1-SPEED
CONV.
BLO WER
MOTOR
Motor
Junction Box
BRN
BRN
BLK YEL
ELC0445 WIRE DIAGRAM CCSI CONVECTION OVEN (Electric)
L1
L2
L3
N
CONTACTOR
Back up
Thermostat
FUSES
Heat Indicator
Light
D oo r Cl o sed
N.O.
N.C.
BLK
RED
RED
WHT w/ Red
WHT w/ Blk
YEL
BLK
RED
YEL
WHT
BLK
WHT
WHT w/ Red
WHT w/ Blk
BLK w/ Wht
BLK w/ Red
208Vac/240Vac 60Hz 3 Phase
POWE R
FUSES
T er min al
Block
Safety Earth
Ground
H1 H2 H3
CAVI TY TEM P SENSE
Front Control Panel
OVEN OFF
COOK
COOL
DOWN
LIGHT OFF
OVEN READY
5 2
15
4 7
10
8
13 14
1
11
5 2
15
4 7
10
8
13 14
1
11
5 2
15
4 7
10
8
13 14
1
11
5 2
15
4 7
10
8
13 14
1
11
Back Up
Digital
31
10
9
32
33
31
10
9
32
33
Back Up
Digital
31
10
9
32
33
Cool
Dow n
Cook
BLK (Contactor)
BLK (Controls)
RED (Contactor)
RED (Controls)
WHT w/Red (H2)
WHT w/Blk (H1)
YEL (Contactor)
WHT (H3)
L1
L2
L3
N
208Vac/240Vac
60Hz
Single Phase
BLK (Contactor)
BLK (Controls)
RED (Contactor)
RED (Controls)
WHT w/Red (H2)
WHT w/Blk (H1)
YEL (Contactor)
WHT (H3)
L1
L2
L3
N
208Vac/240Vac
60Hz
Single Phase
N.0.
COIL
N.0.
COIL
CAVI TY TEM P
10
9
11
5
19
6
10
9
10
9
31
31
33
3
COM
9
10 11
11
18 19
9
10 11
12
12
3
3
33
33
4
4
4
1
8 1 4
6 6 5 5
COILCOIL
2
2NC
1
1
20
Tr ansf or me r
1 2
5 6
7
8
11 12
Tr ansf or me r
1 2
5 6
7
8
11 12
32
32
20
20
10
9
11 22 33 44 551 2 3 4 5
BLK
BLK (Contactor)
BLK (Controls)
RED (Contactor)
RED (Controls)
WHT w/Red (H2)
WHT w/Blk (H1)
YEL (Contactor)
WHT (H3)
L1
L2
L3
N
220-240/380-415Vac
50/60Hz
3 Phase
4
19
11/18
10
18
9
Door
Switch
Relay
YEL
BRN
WHT
RED
RED
RED
RED
GRN
GRN
RED
RED
RED
RED
RED
RED
BRN
ORN
RED
W HT
BRN
Digital Control
Power Switch
Control Select Switch
Half Size Element
Connect ion s
H1 H2 H3
WIRE DIAGRAM

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Electric Half-Size
Convection Oven Manual
LOCATION OF THE OVEN
Proper planning and placement of the oven will give you the best results in terms of long term user
convenience and satisfactory performance. We urge you to give adequate thought in the placement of your
oven prior to its arrival.
• The oven should be placed in an area which is free from drafts and accessible for proper operation and
servicing.
• The area around the oven must be kept clear of combustible materials. A minimum of one (1) inch
from the left or right side, three (3) inches from the rear and eight (8) inches from the oor must be
maintained between the oven and any combustible or non-combustible surface.
It is also important not to obstruct the natural ow of ventilation air if the oven is to operate properly. Do
not place any objects on top of the oven. This oven should not be installed on a curb base or sealed to the
wall. Either condition can prevent proper ventilation of the blower motor. The blower motor has a thermal
protection device which will trip because of excessive ambient temperatures at the side of the oven. If
the device trips continually, this condition should be corrected immediately to avoid damaging the oven
permanently.
Before making any connections to the oven, check the rating plate to be sure the oven specications
concur with the voltage and phase to be supplied to the oven.
The rating plate and serial number data are located behind the motor access cover on the right side panel.
INSTALLATION INSTRUCTIONS
ELECTRICAL CONNECTIONS
Each section of the Duke 5/9 Half-Size Convection Ovens is rated at 8.0 kW.
Your oven is supplied for connection to a 208 or 240 volt, 1 phase or 3 phase grounded circuit.
The electric motor, indicator lights and control circuits are powered internally and do not have a
separate power supply.
Before making any connections to these units, check the rating plate to assure that the voltage
and phase rating of the oven is compatible with the electrical supply. When installing, all ovens
must be electrically grounded in accordance with local codes or in the absence of local codes,
with the National Electrical Code, ANSI/NFPA 70-1990 (in Canada - CSA Std. C22.1).
Wiring diagrams are located on the inside of the motor access panel, on the right side of the oven.
VENTILATION
Proper ventilation is very important for the proper function of your oven. A good ventilation system will
allow the oven to function properly as well as remove unwanted vapors. Not venting the ovens properly
can result in unsatisfactory baking results as well as the possibility of damaging your oven.
OVEN ASSEMBLY
Before assembling and installing the oven, please check to make sure that all necessary parts are present.
Please check the interior of all oven sections for the parts needed to assemble and install your oven(s).

Electric Half-Size
Convection Oven Manual
8
INSTALLATION INSTRUCTIONS
ADJUSTMENTS ASSOCIATED WITH INSTALLATION
Each oven section and all its components parts have been tested thoroughly and inspected before your
oven was shipped from the factory. However, it is sometimes necessary to further test or adjust the oven
once it has been installed. Such adjustments are the responsibility of the Dealer or Installer. These types of
adjustments are not considered defects, rather a normal and routine part of the proper installation of the
equipment.
These adjustments include but are not limited to:
• Adjustment and re-calibration of the controller
• Adjustment to the doors
• Leveling and tightening of fasteners.
NOTE: No installation should be considered complete without proper inspection and, if
necessary, any adjustments by qualied service or installation personnel.
LITTLE CAEARS OVEN CONTROL
LITTLE CAEARS CONTROLS
Main Power On/OFF Switch
Power On Light - Indicates elements are on. Light
will go out when set temperature has been reached
Display - Indicated Time and/or Temperature
Programing Buttons
Preprogrammed Buttons - for 1through 5 dierent
recipe settings
Fuses - 10 Amp Time Delay Protective

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Electric Half-Size
Convection Oven Manual
B. PROGRAMMING INSTRUCTIONS
Toadjustaparameter: cooktime,loadcontrolsettings,
duty cycle time- based, setpoint, oset, the following
process needs to be followed:
a. Select thedesiredmenu itembyholding downthe
MENU push button and pressing the UP/DOWN
buttons until the menu item is displayed (The
Menu items are numbered S1 through S7)
b. Select thedesiredmenu itembyholding downthe
MENU push button and pressing the UP/DOWN
buttons until the menu item is displayed (The
Menu items are numbered S1 through S7)
c. Press one of the following buttons:
Button 1 Pressed:
The display will show the number “2”.
1. Press the button that is to have its baking time
changed. The baking time for the particular switch
will be shown in the display. A baking time must
be programmed for selections 1, 2, 3 and 4. Use
the UP/DOWN buttons to change the baking time
to that desired.
NOTE: To change seconds hold in the start
switch for one tray, then use the UP/DOWN
switches.
2. Press the “Enter” switch to store the change.
Button 2 Pressed:
The setpoint temperature will be shown in the display.
1. Use the UP/DOWN switch to set the new setpoint.
2. Press the“ENTER”switch to store the new setpoint.
Button 3 Pressed:
The display will show the number “2”.
1. Press the switch that is to have its load control
changed. The load control “ON TIME” for that
particular switch will be shown on the display.
An“On Time”must be programmed for selections
1,2, 3 and 4.
2. Use the UP/DOWN switches to change the load
control setting.
3. Press the “ENTER” switch to store the new load
control setting.
Button 4 Pressed:
The Time Base will show in the display.
NOTE: The Time Base should never be
changed unless directed to do so by
Corporate headquarters
1. Use the UP/DOWN switch to change the Time
Base.
2. Press the “ENTER” switch to store the new Time
Base.
Button 5 Pressed:
The Oset will show in the display
1. Use the UP/DOWN switches to change the Oset
value.
# Trays 1 2 3 4 5
Cook Time 6:00 6:00 6:00 6:00 6:00
Temperature 375° 375° 375° 375° 375°
On Time 60 80 130 160 160
Duty Cycle 160 160 160 160 160
Oset 0 0 0 0 0
Rack Position 2 1,3 1,2,3 1,2,3,4 1,2,3,4,5
A. PROGRAM PARAMETERS
This unit comes pre-programmed from the factory
with the following parameters for Menu items S1
and S2
Menu Item S1
Crazy Bread
CHANGING OVEN PARAMETERS
Switch To Change
1Cooking Time
2Cooking Temperature (Setpoint)
3 Duty Cycle On-Time
4 Duty Cycle Time Base
5 Oset
NOTE: Rack position is based on counting
from the top rung downward.

Electric Half-Size
Convection Oven Manual
10
NOTE: pressing the DOWN switch until the
display goes past zero (0) will be negative
values, and will be indicated by a lighted
COLON.
1. Press the “ENTER” switch to store the new Oset.
NOTE: The Oset is used as a means to
calibrate the probe temperature to agree
with the temperature in the center of the
oven. The factory setting for Oset is 30.
CONTROLLER RESET
In rare situations, such as a lightening strike near the
restaurant, the computer may lose its program, or
become “locked up”. If this should happen, press the
RESET switch to reset the computer, or turn the power
to the oven o and back on. Resetting the computer
re-synchronizes its program ow.
CHANGING OVEN PARAMETERS  continued