Southbend EB20 Service Manual

IMPORTANT FOR FUTURE

Please complete this information
and retain this manual tor the life of
the equipment.
MODEL #____________

SERIAL #____________
DATE PURCHASED ______

REFERENCE

OPERATOR'S MANUAL

INSTALLATION

OPERATION AND MAINTENANCE INSTRUCTIONS

MARATHONER GOLD

ELECTRIC CONVECTION OVEN

MODELS: 10, 20,

PREFIX ES, EB

SUFFIX SC, CC, CH, PC, RT

WARNING

Improper installation, adjustment, alteration, service, or maintenance can cause property

damage, injury or death. Read the installation, operation and maintenance instructions thoroughly

before installing and operating this equipment-

1100 Old Honeycutt Road • Fuquay-Varina, NC 27526

[phone] • [phone] • FAX [phone] • [phone]

Middleby Corp. Service Hot Line [phone] (after hours)

ELECTRIC CONVECTION OVEN

(MANUAL SECTION CO)

SAFETY PRECAUTIONS

Before installing and operating this equipment, be sure everyone involved in its operation is fully trained and aware of precautions. Accidents
and problems can be caused by failure to follow fundamental rules and precautions.

The following symbols, found throughout this manual, alert you to potentially dangerous conditions to the operator, service personnel, or to
the equipment.

This symbol warns of immediate hazards which will result in severe injury or death.

This symbol refers to a potential hazard or unsafe practice which could result in injury or death.

This symbol refers to a potential hazard or unsafe practice which could result in injury, product, or property
damage.

This symbol refers to information that needs special attention or must be fully understood, even though not
dangerous.

WARNING FIRE HAZARD

For your safety, do not store or use gasoline or other flammable vapors and

liquids in the vicinity of this or any other appliance.

Keep area around appliances free and clear from combustibles.

WARNING

Asphyxiation can result from improper ventilation. Do not obstruct the flow of

combustion and ventilation air to and from your cooking equipment.

WARNING

SHOCK HAZARD

Do not open panels that require the use of tools.

NOTICE

Be sure the Operator's Manual and important papers are given to the proper authority to

retain for future reference.

Models:  ES-20  EB-20 NOTE: Not for Scale. For Dimensional Purposes Only.

1

phase

3 phase

DIMENSIONS: ( ) = Millimeters

Exterior Electrical Connections Oven Bottom Door Opening

Models

ES-20 38" 38 3/4" 64" 29" 30" 6" 2" 16 1/2" 45 1/2" 33" 42" 18 5/8" 13 1/2"

EB-20 38" 45 1/8" 64" 29" 36 3/8" 6" 2" 16 1/2" 45 1/2" 33" 42" 18 5/8" 13'/2'

Width Depth Height Dk. Depth Legs Height Height

A P C

(965) (984) (1626) (737) (762) (152) (51) (419) (1156) (838) (1067) (473) (343)

(965) (1146) (1626) (737) (892) (152) (51) (419) (1156) (838) (1067) (473) (343)

D

E F

G H I

J K

L M

Models

ES-20 29- 22 1/2" 20" 28 1/4" 22" 55" 45 1/2" 45" 65.2 cu. ft 1040lbs.

EB-20 29" 29" 20" 28 1/4" 28 1/4" 55" 45 1/2" 45" 65.2cu.ffc 1040lbs.

Oven Interior-Each Pan Clearance Crate Size

Width Depth Height Width Depth Width Depth Height

(740) (572) (510) (720) (559) (1397) (1156) (1143) 1.85cu.m.

(740) (740) (510) (720) (720) (1397) (1156) (1143) 1.85 cu. m.

Cubic Volume Crated Weight

Electrical Data

Voltage

12 kw 208 VAC, 60 HZ 58 34 34 31 0

Heating 220-240 VAC, 50 H2 46 28 28 24 0

Elements 240 VAC, 60 HZ 50 30 30 26 0

And 380/220 VAC, 50 HZ 32 17 17 21 4

Controls 415 240 VAC, 50 H2 50 15 15 19 4

480 VAC, 60 H2 25 14 14 13 0

Amps Per Line

X Y Z Nuet

UTILITY INFORMATION:

STANDARD 1/2 horsepower, 2 speed motor, 1725/1140 R.P.M

PAGE 3

LOCATION OF WIRING DIAGRAM ON UNIT:

The electrical diagram (Item "A") is located on the left side of the fold down control panel. To access the diagram remove screw at top of
control panel (Item "B") on figure 1. Then pull control panel down by placing fingers under the lip portion at the top of the control panel and
placing your thumb on front of the unit. Follow the arrow on figure 1.

NOTICE

Southbend reserves the right to change specifications and product design without notice.

Such revisions do not entitle the buyer to corresponding changes, improvements, additions,

or replacements for previously purchased equipment.

NOTICE

These procedures must be followed by qualified personnel or warranty will be void.

PAGE 4

GENERAL:

absen

ce of local codes with the National Electrical Code ANSI/NFPA 70

-

latest edition.

NOTICE
The unit, when installed, must be electrically grounded and comply with local codes, or in the

Canadian installation must comply with CSA-Standard C22.2 No. 109-M1981 Part ll-Commercial
Cooking Appliances.

ELECTRIC CONNECTION:

The electrical diagram is located on the fold down control panel. Refer to page 4 for location. Be sure that the input voltage and
phase match the requirements shown on the serial plate. The serial plate is located behind the fold down control panel, mounted
to the left side of the control compartment. A positive ground connection is essential.

SINGLE PHASE CONVERSION:
All units are shipped wired for single phase or three phase. This will be determined by the original factory order Refer to phase
loading and line amperes chart on page 6, or on the wiring diagram for wire size and amp requirements.

208 AND HIGHER VOLTAGES:

Ovens rated at 208 volt or higher are supplied with a 3 or 4 pole terminal block. This terminal block can be accessed by
removing the cover panel located on the rear of the control panel compartment. To connect the supply wires remove cover and
route supply wires through hole above the connection cover with strain relief fitting. If necessary to remove body side to make
connection refer to Step 1 below. Insert supply wires, one into each pole of the terminal block, and tighten screws in terminal
block. Insert ground lug and tighten screw. Replace cover and turn power on to unit Test for proper operation.

NOTE: If the oven installation requires that you change the phase of the oven refer to the instructions below. If you are changing
the phase on a unit rated at 415 volts refer to the wiring diagram for conversion.

To convert the phase of the oven first determine the field connection voltage and phase required. If the unit is currently installed
TURN OFF POWER SUPPLY BEFORE ATTEMPTING THIS CONVERSION. If the unit is now being installed have the field

power supply in place and ready to connect to the oven when the conversion is complete. Follow the appropriate directions
below.

To convert from three phase to single phase:
Note: The unit built for three phase will have a small jumper wire attached with the element box cover to the rear of the oven.

Removing the box will free the jumper wire. This wire is used when you convert the unit from three phase to single phase.
Step 1. Remove the right body side of the oven. This will require that you remove the combustion cover below

the oven doors to access the screw which holds the front lower comer of the body side. Remove the

Step 2. Once the body side has been removed locate the wires that run from the contactor to the elements. The

screws that hold the back of the body side and remove the body side.
center wire (T2) that runs from the terminal block to the contactor and the corresponding center wire

PAGE 5

(L2) that runs from the contactor to the elements should be removed.

PHASE

TOTAL

THREE

PHASE

SINGLE

PHASE

Step 3. Remove the element box cover. Disconnect the wire (L2) from the element assembly and remove it from

the oven.

Step 4. Rewire the element connections according to Figure 2. for single phase. Be sure to inspect the power

supply and the wiring diagram on the unit to verify the wiring is correct.

Verify all wire connections are tight at the elements, contactor, and terminal block.
Step 5. Connect your power supply wires to the terminal block in the rear of the control compartment.
Step 6. Reinstall body side, combustion cover, and element box cover.

To convert from single phase to three phase
Note: The unit built for single phase will have two extra wires inside the control panel compartment. The extra wires are

attached to the wires that run from the contactor to the elements. These wires will be used to convert the unit from
single phase to three phase.

Step 1. Remove the right body side of the oven. This will require that you remove the combustion cover below

the oven doors to access the screw which holds the front lower comer of the body side. Remove the
screws that hold the back of the body side and remove the body side.

Step 2. Once the body side has been removed locate the wires that run from the contactor to the elements. The

wires should have two extra wires (attached with wire ties) that are not presently being used. Cut the

wire ties that are holding the extra wires and install the longer of the two wires to the center terminal of
the contactor (L2). Step 3. Install the shorter of the two wires to the center terminals between the contactor(T2)

and the terminal block. Verify all wire connections are tight at the elements, contactor, and terminal

block.

Step 4. Remove the element box cover. Attach the wire you installed on (L2) to the element assembly refer to Figure

3.

Step 5. Rewire the element connections according to Figure 3. for three phase. Be sure to inspect the power supply

and the wiring diagram on the unit to verify the wiring is correct. Step 6. Connect your power

supply wires to the terminal block in the rear of the control compartment.

PHASE LOADING AND LINE AMPERES CHART

PHASE LOADING AND LINE AMPERES AS SHOWN

THREE PHASE LOADING

KW/PHASE

L1-L2 1.2-L3 L1.L3 LI L2 L3

VOLTAGE

480

415

380

240

220V 50 HZ

208

Heating Elements 11-0 3.667 3.667 3.667 13.2 13.2 13.2 22.9 12 10

Motor & Controls 0.9 0.0 0.0 0.0 22. 0.0 22. 2.2

Heating Elements 11.0 3.667 3.667 3.667 15.3 15.3 15.3 45.9 12 6

Motor & Controls 0.9 0.0 L3-N 0.9 0.0 0.0 3.8 3.8

Heating Elements 11.0 3.667 3.667 3.667 16.7 16.7 16.7 28.9 12 8

Motor & Controls 0.9 0.0 L3-N 0.9 0.0 0.0 4.1 4.1

Heating Elements 11.0 3.667 3.667 3.667 26.4 26.4 26.4 45.8 8 6

Motor & Controls 0.9 0.0 0.0 0.9 3.8 0.0 3.8 3.8

Heating Sements 9.25 3.1 3.1 3.1 24.2 24.2 24.2 42.0 8 6

Motor & Controls 0.9 0.0 0.0 0.9 4.1 0.0 4.1 4.1

Heating Elements 11-0 3.667 3.667 3.667 30.5 30.5 30.5 52.9 8 4

Motor & Controls 0.9 0.0 0.0 0.9 4.3 0.0 4.3 4.3

TOTAL KW

PAGE 6

NOMINAL AMPERES/ LINE WIRE

THREE PHASE SINGLE

MIN. SUPPLY

WIRE AVG.SIZE

CLEARANCES:

Therefore, installations should comply with all local codes.

Minimum Clearances - Inches (mm)

Construction Construction

Back

Right Side 0"(0) 0"(0)

Left Side

Floor

Clearance for proper air circulation for the motor is 2"(51 mm) from the back of the motor to the wall.

All units must be installed in such a manner that the flow of combustion and ventilation air are not obstructed. Provisions for an adequate air
supply must be provided. Do not obstruct the front or rear of the unit, as combustion air enters through this area. Be sure to inspect and clean
the ventilation system according to the ventilation equipment manufacturer's instructions.

Adequate clearance must be provided in the aisle and at the side and rear to allow the door to open sufficiently to permit the
removal of the racks and for serviceability.

From Combustible

2"(51)

0"(0)
0"(0)

From Non-Combustible

2"(51)

0"(0)
0"(0)

NOTICE

Floor drain must be located outside the confines of the equipment base, or damage to the
equipment may occur.

Do not locate unit adjacent to any high heat or grease producing piece of equipment, such as a range top, griddle, fryer, etc.,
that could allow radiant heat to raise the exterior temperature of the — above 130°F (54°C).

DO NOT MOUNT ABOVE OTHER COOKING EQUIPMENT.

NOTICE

Local codes regarding installation vary greatly from one area to another. The National Fire
Protection Association, Inc. states in its NFPA 96 latest edition that local codes are
"authority having jurisdiction" when it comes to installation requirements for equipment.

EXHAUST FANS AND CANOPIES: Canopies are set over ranges, ovens, etc., for ventilation purposes. It is recommended that
a canopy extend 6” past the appliance and be located 6'6" from the floor. Filter should be installed at an angle of 45 degrees or
more with the horizontal. This position prevents dripping grease and facilitates collecting the run-off grease in a drip pan, usually
installed with a filter. A strong exhaust fan tends to create a vacuum in the room and may interfere with burner performance or
may extinguish pilot flames. Fresh air openings approximately equal to the fan area will relieve such a vacuum.

WALL EXHAUST FAN: The exhaust fan should be installed at least 2" above the vent opening at the top of the unit
In case of unsatisfactory performance on any appliance, check the appliance with the exhaust fan in the "OFP position. Do this

only long enough to check equipment performance. Then turn hood back on and let it run to remove any exhaust that may have
accumulated during the test.

NOTICE

Proper ventilation is the owner's responsibility. Any problem due to improper ventilation will
not be covered by warranty.

PAGE 7

WARNING

Improper ventilation can result in personal injury or death. Ventilation which fails to properly remove
flue products can cause headaches, drowsiness, nausea, or could result in death.

LEVELING:

Unit must be level to assure maximum performance. Improper leveling may void warranty.

TO INSTALL:

1. Remove crating with care. Remove all wood blocking, packing material and accessories.

2. The legs or stand should be installed after the unit has been uncrated, near the area where it will be used.

3. Raise unit sufficiently to allow legs to be installed with four bolts provided existing in base.

4. The legs can be adjusted to overcome an uneven floor. Use a spirit level in all directions on the middle oven
rack.

5. When casters are supplied, the locking swivel type casters should be installed in the front.

6. Casters are provided with a zerk fitting for lubrication.

When a lift truck or other mechanical means are not available, and manual labor is involved, please consider the
following suggestions.

1. Raise each comer or, if feasible, raise an entire side by "leaning" the unit.

2. For safety, "shore up" and support the raised section with an adequate blocking arrangement strong enough
to support the load.

3. When long legs are being installed and the unit must be tipped beyond the stable point, lean unit against a
strong wall or other suitable structure to prevent it from "falling over."

4. When absolutely necessary and unit must be placed "completely over," lay ONLY on its LEFT side or BACK.
Take care to protect finish on left side. On back, provide means to keep load from resting on motor.

5. Bring unit to its straight position gently. NEVER DROP, or allow unit to FALL.

NOTE: An "open" storage rack arrangement may be incorporated on units supported by high legs. Directions and

illustrations are provided on another sheet and are also provided with these parts. Refer to diagram titled
"Assembly for open rack storage" in the installation section of this manual.

PERFORMANCE CHECK:

The following items should be checked within the first 30 days of operation by a qualified service technician.

1. Verify equipment is level.

2. Verify proper electrical characteristics - voltage, cycle, phase.

3. Check thermostat operation; calibrate if required.

4. Check ventilation.

5. Check electrical connections - external and internal.

6. Check door for proper alignment, tension, seal, and adjustment.

7. Check timers, switches and motor for proper installation and operation.

8. Check for any damage to unit from shipping or installation.

9. Check for proper clearance from combustible materials.

It is common on new products that a bum off time is necessary to dry out protective oil metal covering and to sea­son insulation.

PAGE 8

LEGS FOR SINGLE DECK OVENS

ITEM PART NUMBER DESCRIPTION

* 1146213 3/8 x 16 x 1 Hex Head Bolt
* 1146513 3/8 Lock Washer

* 1146522 3/8 Flat Washer

A 1175090 Single Deck Adj. Leg

B 1174266 Adj. Foot for Leg

† 1173584 Flanged Foot for Leg

* Not shown (qty. 16 used per unit to attach legs to
unit.)

† Flanged Foot is optional replacement for 1174266

CASTERS FOR SINGLE DECK OVENS

ITEM PART NUMBER DESCRIPTION

* 1146213 3/8x16x1 Hex Head Bolt
* 1146513 3/8 Lock Washer

* 1146522 3/8 Flat Washer

A 1175089 Single Deck Caster Leg

B 1174263 Caster w/o Brake

C 1174264 Caster with Brake
† 1174265 Caster Package

* Not shown (qty. 16 used per unit to attach legs to unit.)

† This package contains 4 casters, 2 with locks, 2 with

out locks no legs pads, bolts or washers are included
with this package.

PAGE 9

LEGS FOR DOUBLE STACKED OVENS

ITEM PART NUMBER

DESCRIPTION

CASTERS FOR DOUBLE STACKED OVENS

ITEM PART NUMBER DESCRIPTION

* 1146213 3/8x16x1 Hex Head Bolt
* 1146513 3/8 Lock Washer

* 1146522 3/8 Flat Washer

A 1172788 Leg Pad

B 1174259 SS Leg, 3/4 Stud
† 1174260 Leg Package

* Bolts, lock washers, and flat washers not shown.

Requires 4 of each per pad for a total of 16 each per
double oven.

† This package consists of 4 legs only. No leg pads,

bolts or washers are included in this package.

* 1146213 3/8x16x1 Hex Head Bolt

* 1146513 3/8 Lock Washer

* 1146522 3/8 Rat Washer

A 1172788 Leg Pad

B 1174263 Caster less Brake

C 1174264 Caster with Brake

† 1174265 Caster Package

* Bolts, lock washers, and flat washers not shown.

Requires 4 of each per pad for a total of 16 each per
double oven.

† This package consists of 4 legs only. No leg pads,

bolts or washers are included in this package.

PAGE 10

INSTRUCTIONS FOR STACKING UNITS IN THE FIELD

3.

Next, locate and remove screws that

1. After uncrating units, identify the unit that is
to be the bottom unit. This will be the oven
that has leg pads bolted to the bottom of the
oven.

2. The bottom unit will have a box of (4) legs
(P/N 1174260) or (4) casters (P/N 1174265)
depending on what was ordered with the
oven. Remove and attach legs or casters to
the bottom of the lower unit. The pads that
the legs or casters thread into should
already be bolted to the bottom of this oven.

NOTICE

If installing casters, place the two (2) casters that have locks, on the front of the unit so it
may be locked into position easily.

hold the combustion chamber cover on
bottom oven. Refer to figure 7, for
screws (Items "A"). Once the screws
are removed, lift up on the panel and
pull forward to remove.

4. Remove screws (Item "B") from right
body side. Remove right body side.

PAGE 11

5. Next, lift the top unit and position it on top of the lower unit as shown in Figure

8.

6. Move to the rear of the unit and remove screws (Items "A" and "B") in Figure 9.

7. Place tie bracket, item "C" (P/N 1175085) on rear of unit. Line up holes in the tie bracket with holes in rear of unit. Refer to
Figure 10. Reinsert the six screws taken out in Step 6 (Items "A" and "B").

Note: Leave screws (Items "A" and "8") loose until Step 8 is complete.

PAGE 12

8. Insert 2 bolts (Item "A", Figure 11) through
the top of the bottom oven and screw into
threaded holes in bottom of top oven. Finish
tightening bolts installed in Step 7.

9. Make field wire connections to terminal block
while body side is removed.

10. Reinstall body sides and screws that were
removed in steps 3 & 4.

PAGE 13

PARTS LIST FOR OPEN RACK STORAGE GUIDE

2

2

Includes Solid Shelf (Optional)

ITEM

PART# DESCRIPTION 1175506 1175507 1175508 1175509

11 Position 11 Position 11 Position 11 Position

Shallow w/Shelf Deep w/Shelf Shallow w/Shelf Deep w/Shelf

1146304 10x1/2Phillips

Screw 18 18 18 18

A 1175296 Rack Hanger 2 2 2 2
B 1175514 Stop Channel 1 1 1 1

C 1175438 Side Rack

11 Position

Shallow 2

C 1175439 Side Rack

11 Position

Deep

D 1175294 Shelf Shallow 1
D 1175295 Shelf Deep

E 1175504 Front Channel

Frame

F 1175505 Rear Channel

Frame

G 6660 Side Rack Clip 4 4 4 4

1

1 1
1 1

2

PAGE 14

ASSEMBLY INSTRUCTIONS FOR OPEN RACK STORAGE

Includes Solid Shelf (Optional)

1. Refer to the parts chart on the first page, and verify that all parts and quantities are correct.

2. Attach frame hanger (1175296) (Item "A") to underside of oven. Be sure the flanged side of the rack hanger faces the front
of the unit. Refer to figure 13.

NOTE: All holes are pre-punched, and assembly should be done with the screws provided.

3. Attach frame hanger (117296) (Item "A"), to underside of oven. The rear frame hanger should be mounted so that the
flanged side of the rack hanger faces the rear of the unit. Refer to figure 13.

4. Hang rack guides from outside frame hanger holes for racks, or inside hanger holes for pans. Refer to figure 14.

PAGE 15

5. Insert bottom of rack guides into front and rear holes in shelf. If you have an open rack guide kit, insert bottom of rack guides in to holes
in the left and right side of front and rear channel frames. Refer to figure 15.

FIGURE 15 6. Secure bottom of rack guide to shelf or front and rear channel frames with side rack clips. Refer to figure 16.

FIGURE 16

PAGE 16

7. Install rack stop to rear frame hanger and rear of bottom shelf, or rear channel frame. Refer to figure 17.

FIGURE 17

PAGE 17