IMPORTANT FOR FUTURE REFERENCE
Please complete this information and retain this
manual for the life of the equi pment:
Model #: __________________________
Serial #: __________________________
Date Purchased: ___________________
OPERATOR’S MANUAL
Medium Duty Counterline
Griddle Models MDG-24, MDG-36
(shown), and MDG-48
Thermostatic Griddle Models
MDGT-24, MDGT-36, and MDGT-48
Charbroiler Models MDC-24,
MDC-36, and MDG-48
Lava-Rock Models MDCL-24,
MDCL-36 (shown), and MDCL-48
Open Top Models MDO-12,
MDO-24, and MDO-36 (shown)
! WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage,
injury or death. Read the installation, operating and maintenance instructions thoroughly before
installing or servicing this equipment.
1100 Old Honeycutt Road, Fuquay-Varina, NC 27526
(800) 348-2558 or (919) 552-9161 • FAX (800) 348-2558 or (919) 552-9798
MANUAL 1178822 REV 3
$18.00
MEDIUM DUTY COUNTERLINE
MANUAL SECTION MD
MEDIUM DUTY COUNTERLINE
SAFETY PRECAUTIONS
Before installing a nd opera ting this equipm ent, be sure e ver yone invol ved in its operat ion is f ully tr ained and
aware of precautions. Accidents and problems can be caused by failure to follow fundamental rules and
precautions.
The following s ymbols, found throughout this manual, alert you to potentially dangerous conditions to the
operator, service personnel, or to the equipment.
! DANGER
! WARNING
! CAUTION
NOTICE
This symbol warns of immediate hazards that will result in severe injury or
death.
This symbol refers to a potential hazard or unsafe practice that could result in
injury or death.
This symbol refers to a potential hazard or unsafe practice that could result in
injury, product damage, 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 ga soline or other flamm able vapors and l iquids in the vicinit y of this or an y other
appliance.
Keep area around appliances free and clear of combustibles.
Purchaser of equipment m ust post in a prom inent location, detailed instruct ions to be follo wed in the
event the operator smells gas. Obtain the instructions from the local gas supplier.
! WARNING
Asphyxiation can result from improper ventilation. Do not obstruct the flow of combustion and
ventilation air to and from your cooking equipment.
NOTICE
Be sure this Operator’s Man ual and important papers ar e given to the proper authorit y to retain for
future reference.
PAGE 2OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE TABLE OF CONTENTS
Congratulations! You have purchased one of the finest pieces of commercial cooking equipment on the
market.
You will find that your new equipm ent, like all Southbend equipment, has been desig ned and m anufactured
to meet the toughest standards in the indus try. Each piece of Southbend equipm ent is carefully eng ineered
and designs are verified through laboratory tests and field installations. With proper care and field
maintenance, you will experience years of reliable, trouble-free operation. For best results, read this
manual carefully.
RETAIN THIS MANUAL FOR FUTURE REFERENCE.
Table of Contents
Specifications..........................................................................................................................4
Installation...............................................................................................................................9
Operation ..............................................................................................................................12
Cleaning................................................................................................................................14
Adjustments ..........................................................................................................................16
Troubleshooting ....................................................................................................................18
Parts......................................................................................................................................21
Read these instructions carefully before attempting installation. Installation and initial startup should be
performed by a qualified installer. Unless the installation instructions for this product are followed by a
qualified service tech nician (a person experienced in and knowledge able with the insta llation of comm ercial
gas an/or electric cooking equipm ent) then the terms and conditi ons on the Ma nufactur er’s Lim ited W arranty
will be rendered void and no warranty of any kind shall apply.
In the event you have questions concerning the installation, use, care, or service of the product, write to:
Technical Service Department
Southbend
1100 Old Honeycutt Road
Fuquay-Varina, North Carolina 27526 USA
The serial plate is located on the interior side of the valve panel, as shown below:
Figure 1
OPERATOR’S MANUAL 1178822 REV 3PAGE 3
Serial plate is located behind this panel.
SPECIFICATIONS MEDIUM DUTY COUNTERLINE
SPECIFICATIONS
SPECIFICATIONS
NOTICE
Installation must comply with National Fuel Gas Code, ANSI Z223.1, Natura l Gas Installation Code,
CAN/CGA-B149.1, or the Propane Installation Code, CAN/CGA-B149.2, as applicable.
Local codes regarding install ation var y greatly from one area to an other. T he National Fi re Protec tion
Association, Inc. states in its NFPA 96 latest edition that local codes are the “authority having
jurisdiction” when it com es to installation r equirements for equipment. Theref ore, installations shou ld
comply with all local codes.
Southbend reserves the right to change specifications and product design without notice. Such
revisions do not e ntitle the bu yer to c orres pondi ng cha nges, add it ions, or rep lacem ents f or previo usl y
purchased equipment.
This product is intended for commercial use only, not for household use.
GAS SUPPLY
The Serial Plate is located on the inte rior side of the valve pa nel (see Figure 1 on pa ge 3). It indicates t he
type of gas the unit is equipped to burn. All So uthbend equipment is adj usted at the factory. Ch eck type of
gas on serial plate.
These models are design-cer tified for operat ion on natural or propan e gases. The un it is shipp ed configur ed
for natural gas. A k it for c onversion to using pro pane gas is inclu ded (see instruct ions in k it or pag e 9 of this
manual).
This appliance should be connected ONLY to the type of gas for which it is configured.
An adequate gas supply is imperative. Undersized or low pressure lines will restrict the volume of gas
required for satisf actor y perf ormanc e. Fluctua tions of m ore than 25% on nat ural gas or 10% on pro pane gas
will create problems and affect burner operating characteristics. A 1/8" pressure tap is located on the
manifold to measure the manifold pressure.
An adequate gas supply li ne to the unit should be no smaller than t he inside diameter of the pipe from the
unit to which it is connected.
Purge the supply line to clean out dust, dirt, or other foreign matter before connecting the line to the unit.
All pipe joints and co nnections must be tested t horoughl y for gas leak s. Use onl y soapy water for testing on
all gases. NEVER use an open flame to check f or gas leaks . All c onnec tions m ust be chec k ed for leak s after
the unit has been put into operation. Test pressure should not exceed 14" W.C.
! CAUTION
THIS APPLIANCE AND ITS INDIVIDUAL SHUTOFF VALVE MUST BE DISCONNECTED FROM
THE GAS SUPPLY PIPING SYST EM DURING ANY PRESSURE TESTING OF THAT SYSTEM AT
TEST PRESSURES IN EXCESS OF 1/2 PSIG (3.45 kPa).
THIS APPLIANCE MUST BE ISOLATED FRO M THE GAS SUPP LY PI PING SYST EM BY C LOSING
ITS INDIVIDUAL MANUAL SHUTOFF V ALVE DURING ANY PRESSURE TESTING OF THE GAS
SUPPLY PIPING SYSTEM AT TEST PRESSURES EQUAL TO OR LESS THAN 1/2 PSIG (3.45
kPa).
PAGE 4OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE SPECIFICATIONS
CLEARANCES
! WARNING
There must be adequ ate clear ance be twee n units and adj acent constr uction. C lear ance m ust als o be
provided for servicing and for operation.
Minimum Clearances from COMBUSTABLE construction:
Griddle Models Open Top Models
Sides 4" 4"
Back 4" 4"
Bottom 4" 4"
Minimum Clearances from NON-COMBUSTABLE construction:
Griddle Models Charbroiler Models Open Top Models
Sides 0" 0" 0"
Back 0" 0" 0"
Bottom 4" 4" 4"
SPECIFICATIONS
VENTILATION
! WARNING
Improper ventilation can result in personal injury or deat h. Ventilation which f ails to properly rem ove
flue products can cause headaches, drowsiness, nausea, or could result in death.
All units must be installed in s uch a manner that the flow of com bustion and ventilation air are not
obstructed. Provis ions for adequ ate air suppl y must be pro vided. Do not obstruct the front of the unit
at the top by the control panel as combustion air enters through these areas.
NOTICE
Proper ventilation is t he owner’s responsibility. An y problem due to improper venti lation will not be
covered by the warranty.
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 thro ugh th is area. Be s ure t o inspec t and c lean the vent ilation s ystem acc ording to the
ventilation equipment manufacturer’s instructions.
In case of unsatisf actory performance on an y appliance, check the appli ance with the ho od exhaust fan in
the “OFF” position. Do th is only long enough to check equipment performance. T hen turn the fan back on
and let it run to remove any exhaust that may have accumulated during the test.
OPERATOR’S MANUAL 1178822 REV 3PAGE 5
SPECIFICATIONS MEDIUM DUTY COUNTERLINE
Figure 2
DIMENSIONS OF GRIDDLE & THERMOSTATIC-GRIDDLE MODEL S
SPECIFICATIONS
1.7"
27.2"
TOP VIEW
Width (see table below)
3.9"
13.7"
9.8"
7.4"
14.0"
FRONT VIEW
2.8"
4" Adjustable Legs
SIDE VIEW
Model Width Number and Size of Burners Total BTU
MDG-24 & MDGT-24 24" 2 @ 20,000 40,000
MDG-36 & MDGT-36 36" 3 @ 20,000 60,000
MDG-48 & MDGT-48 48" 4 @ 20,000 80,000
2.2"
PAGE 6OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE SPECIFICATIONS
Figure 3
DIMENSIONS OF CHARBROILER MODELS
25.7"
TOP VIEW
Width (see table below)
SPECIFICATIONS
FRONT VIEW
7.8"
17.5"
9.7"
2.8"
4" Adjustable Legs
SIDE VIEW
Model Width Number and Size of Burners Total BTU
MDC-24 & MDCL-24 24" 2 @ 20,000 40,000
MDC-36 & MDCL-36 36" 3 @ 20,000 60,000
MDC-48 & MDCL-48 48" 4 @ 20,000 80,000
2.2"
OPERATOR’S MANUAL 1178822 REV 3PAGE 7
SPECIFICATIONS MEDIUM DUTY COUNTERLINE
Figure 4
DIMENSIONS OF OPEN TOP MODELS
SPECIFICATIONS
27.3"
TOP VIEW
Width (see table below)
FRONT VIEW
MDO-12 12" 2 @ 20,000 40,000
MDO-24 24" 4 @ 20,000 80,000
MDO-36 36" 6 @ 20,000 120,000
12.2"
10.1"
2.2"
Model Width Number and Size of Burners Total BTU
4" Adjustable Legs
SIDE VIEW
6.3"
PAGE 8OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE INSTALLATION
INSTALLATION
NOTICE
Installation must comply with National Fuel Gas Code, ANSI Z223.1, Natura l Gas Installation Code,
CAN/CGA-B149.1, or the Propane Installation Code, CAN/CGA-B149.2, as applicable.
These installation procedures must be followed by qualified personnel or warranty will be void.
Local codes regarding install ation var y greatly from one area to an other. T he National F ire Protec tion
Association, Inc. states in its NFPA 96 latest edition that local codes are the “authority having
jurisdiction” when it com es to installation r equirements for equipment. Theref ore, installations shou ld
comply with all local codes.
Step 1: Unpack
IMMEDIATELY INSPECT FOR SHIPPING DAMAGE
INSTALLATION
All containers shou ld be examined for dam age before and during unlo ading. The freight car rier has
assumed responsibility for its safe transit and delivery. If damaged equipment is received, either
apparent or concealed, a claim must be made with the delivering carrier.
Apparent damage or l oss m u st be noted on the freight b ill at the t im e of deliver y. T he f reight bi ll m ust
then be signed by the c arrier representative (Dr iver). If the bill is not signed, the carrier ma y refuse
the claim. The carrier can supply the necessary forms.
A request for insp ection must be m ade to the carrier within 15 da ys if there is concea led damage or
loss that is not apparent until after the equipment is uncrated. The carrier should arrange an
inspection. Be certain to hold all contents plus all packing material.
1. Uncrate carefully. Report any hidden damage to the freight carrier IMMEDIATELY.
2. Do not remove any tags or labels until unit is installed and working properly.
Step 2: Covert Unit to Use Propane Gas (if necessary)
Each unit is shipped equ ipped with fixed orifice hoods appropriate for use with natural gas. If propane gas
will be used, convert the unit for use with propane gas by the following procedure:
1. Remove the front panel by removing the knobs and screws on the front.
2. For charbroiler and open top m odels, rem ove the grates and bur ners to acc ess the orifices f rom above.
For griddle models, slide t he burner toward the rear of the unit to access the orific es (see diagram on
page 22), OR remove the griddle plate to access the orifices by removing two nuts at the rear of the unit.
3. Remove the natural gas orifices and install the furnished propane orifices.
4. Re-install the burners.
5. Re-install the front panel.
6. Remove the hex- threade d p lug from the pr essur e regula tor. I nsid e is a rem o vable ins er t. Pul l the ins ert
out, turn it around, an d put it back in so th at the end with the l etters “LP” is now fac ing you. Re-attach
the hex-threaded plug. The pressure regulator is now set for 10" (25.4 cm) water column.
7. Check the pressure.
OPERATOR’S MANUAL 1178822 REV 3PAGE 9
INSTALLATION MEDIUM DUTY COUNTERLINE
Provided orific es are size #45 for natural gas and #55 for propane gas. For s pecial gas mixtures, and for
altitudes above 2,000 feet, consult factory for appropriate orifice sizes.
Step 3: Connect Gas Supply
All units are shipped from the factory equipped for use with natural gas. If the unit is to be used with propane
gas, the orifices must be replaced and the pressure regulator converted (see Step 2 on previous page).
If this equipment is being installed at over 2, 000 feet altitude an d that information was not specified when
ordered, contact the appropriate authorized Southbend Service Representative or the Southbend Service
Department. Failure to install with proper orifice sizing will result in poor performance and may void the
warranty.
The serial plate is located interior side of the valve panel (see F igure 1 on page 3). It indicates the type of
gas the unit is equipped to burn. All Southb end equipment is adj usted at the factory. Chec k type of gas on
INSTALLATION
serial plate.
These models are desig n- cer tif ied for operation on nat ur al or prop an e gas es . F or nat ur al gas, t he c o nv er tib le
regulator is set to deliver a 4" W.C. pressure to the manifold. For propane gas, it is set to deliver 10" W.C.
If applicable, the ven t line from the gas appliance pressure regulator shall be installed to the outdoors in
accordance with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI
Z223.1, Natural Gas Installation Code, CAN/CGA-B149.1, or the Propane Installation Code, CAN/CGAB149.2, as applicable.
This appliance should be connected ONLY to the type of gas for which it is equipped.
An adequate gas supply is imperative. Undersized or low pressure lines will restrict the volume of gas
required for satisf actor y perf ormanc e. Fluctua tions of m ore than 25% on nat ural gas or 10% on pro pane gas
will create problems and affect burner operating characteristics. A 1/8" pressure tap is located on the
manifold to measure pressure.
An adequate gas s upp ly li ne t o the u nit should be no smaller than the I. D. of the pi pe f r om the unit to which it
is connected.
Purge the supply line to clean out dust, dirt, or other foreign matter before connecting the line to the unit.
Use pipe joint compound that is suitable for use with LP gas on all threaded connections.
! CAUTION
ALL PIPE JOINTS AND CONNECTIONS MUST BE TESTED THOROUGHLY FOR GAS LEAKS.
USE ONLY SOAPY W ATER FOR TESTING O N ALL GASES. NEVER USE AN O PEN FLAME T O
CHECK FOR GAS LEAK S. ALL CONNECTIONS MUST BE CHEC KED FOR LEAKS AFTER T HE
UNIT HAS BEEN PUT INTO OPERATION. TEST PRESSURE SHOULD NOT EXCEED 14" W.C.
Step 4: Position Unit for Operation
1. Check that the unit is level. The leng th of eac h l eg is adj ustab le b y scr e wing the bottom por tion of the leg
in or out. The unit must be level for proper operation!
2. Check for adequate clearances around the unit (see page 5).
3. Check for adequate ventilation (see page 5).
PAGE 10 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE INSTALLATION
Step 5: Spread Out Lava-Rock Briquettes (Lava-Rock Charbroilers Only)
This step applies only to the insta llation of lav a-rock char broiler models. Such models are shipped with the
lava-rock briquettes in bags located between the lava-rock grates and the top cooking grids.
1. Lift out the cooking grids to reach the bags of lava-rock briquettes.
2. For each section, open the b ag of lava-rock br iquettes and spread them evenly on the lava-rock grate.
The briquettes must be spread evenly to avoid “hot spots.” Discard the empty bags.
3. Reposi tio n the cooking grids above the briquett es .
Step 6: Adjust Air Shutters and Pilot Heights
All units are adjusted at the factory. However, burner air shutters and pilot heig hts should be checked at
installation and adjusted if necessary. On new installations, s tart with the burner of the unit(s) furthest fr om
the gas input to the manifold. This will purge the system of air.
4. Turn main gas supply “ON.”
5. Follow the instructions on pages 12 to 13 light the pilots and burners.
6. If the burner f lame is strong but lifting fr om the burner , loos en the s crew o n the air s hutter and c lose the
shutter a little at a time until the flame settles back onto the burner.
INSTALLATION
Step 7: Condition Griddle Surface
For griddle and ther mostatic-griddle m odels , th e ne w gr i dd le sur f ace s hou ld be c ar ef ul ly tempered and c ared
for in order to avo id possib le dam age. To break in a new gr iddle, f irst wipe it clea n. Nex t, ligh t all the griddle
burners and turn them to low for one hour. T hen gradua lly bring each gr iddle up to f rying t emperatur e. Nex t,
spread three or four o unces of be ef suet, or as a substi tute, bak ing soda, to s eason it. N ever al low water on
a hot griddle and never wash it with soap and water.
OPERATOR’S MANUAL 1178822 REV 3PAGE 11
OPERATION MEDIUM DUTY COUNTERLINE
OPERATION
! DANGER
EXPLOSION HAZARD
Purchaser of equipment m ust post in a prom inent location, detailed instruct ions to be follo wed in the
event the operator smells gas. Obtain the instructions from the local gas supplier.
! CAUTION
To eliminate gas build up which could result in an explosion, in the event of main burner ignition
failure a five minute purge period must be observed prior to re-establishing ignition source.
OPERATION
! CAUTION
Top section pilots, when out, do not interrupt the f low of gas to the burners . Consequently, it is the
responsibilit y of the operator to c heck the ignitio n of the bur ners, imm ediately af ter burner value has
been turned “ON.” Should ignitio n fail after 10 sec onds, turn of f burners, wait 5 minutes, and then tr y
again.
LIGHTING AFTER GAS HAS BEEN SHUT OFF
When turning the main gas supply on after the gas supply has been shut off, do the following:
1. Make sure all of the control valves are in the “OFF” position.
2. Turn on the gas supply.
3. Light the pilots as described below.
GRIDDLE & THERMOSTATIC-GRIDDLE MODE LS
Each 12"-wide gri ddle sectio n has a k nob on t he front pa nel that directl y controls t he flow of gas, a nd so the
heat. Turn the knob clockwise to increase the heat; turn it counterclockwise to reduce the heat.
At the end of each day’s use, turn all knobs to the “OFF ” positi on. Af ter each per iod of use, a llow th e gridd le
surface to cool norm ally. Af ter the gri ddle has c ooled, co at the gridd le surfac e with a light film of cooking oil
to protect the surface from moisture.
To light the pilot of a griddle section, do the following:
1. Turn all control knobs to the “OFF” position.
2. Light the p ilot tu be locat ed n ext to eac h bur ner. T he pilot f lame c an be adj usted b y tur ning the scr ew o n
the end of the pilot fitting.
3. Turn burner knobs to “HI” position. The burners should have a 1/2 " to 5/8" steady b lue flame. Adjus t if
necessary.
4. To turn burners off, turn knob to “OFF” position.
PAGE 12 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE OPERATION
CHARBROILER MODELS
Each 12"-wide char broiler s ection has a knob on the fr ont panel tha t directl y controls the flo w of gas, an d so
the heat. Turn the knob clockwise to increase the heat; turn it counterclockwise to reduce the heat.
At the end of each day’s use, turn all knobs to the “OFF” position.
To light the pilot of a charbroiler section, do the following:
1. Turn all control knobs to the “OFF” position.
2. Light the p ilot tu be locat ed n ext to eac h bur ner. T he pilot f lame c an be adj usted b y tur ning the scr ew o n
the end of the pilot fitting.
3. Turn burner knobs to “HI” position. The burners should have a 1/2 " to 5/8" steady b lue flame. Adjus t if
necessary.
4. To turn burners off, turn knob to “OFF” position.
OPEN-TOP BURNER MODELS
Each 12"-wide open- top burner s ection has t wo knobs on th e front panel th at directl y control the fl ow of gas
to the section’s two b urners, and so control the heat. T urn a knob clockwise to increase the heat; turn it
counterclockwise to reduce the heat.
At the end of each day’s use, turn all knobs to the “OFF” position.
OPERATION
To light the pilots of an open-top burner section, do the following:
1. Turn all gas valves to the “OFF” position.
2. Check to make sure pilots are in the correct position.
3. Light the pilots.
4. Adjust the pilot flame as necessary.
5. Turn burner knobs to “HI” position. Each burner flame should be steady blue and impinge on the
underside of a pot placed on the support grate. Adjust if necessary.
6. To turn burners off, turn knob to “OFF” position.
OVERNIGHT SHUTDOWN
Turn knobs to the “OFF” position to turn the burners off.
EXTENDED-PERIOD SHUTDOWN OF THERMOSTATIC GRIDDLE
To shut down a therm os tatic gridd le for an exte nded per iod (or befor e d isconn ecting th e g as s uppl y), tur n a ll
manual gas valves and pilots “OFF,” then turn the main gas supply valve to “OFF” (see Figure 5 below).
Figure 5
OPERATOR’S MANUAL 1178822 REV 3PAGE 13
Main Gas Supply Valve
CLEANING MEDIUM DUTY COUNTERLINE
CLEANING
Southbend equipment is constructed with the best quality materials and is designed to provide durable
service when properl y maintained. To expect the b est performance, your equipment must be m aintained in
good condition and cleaned dail y. Naturally, the frequenc y and extent of cleaning depends on the amount
and degree of usage.
EXTERIOR AND TOP SECTIONS:
1. Keep exposed, cleanable areas of unit clean at all times.
Daily:
A. Remove, empty, and clean grease drawers and dirt trays.
B. Clean griddle drain chutes.
Monthly:
A. Clean around burner air mixers and orifices if lint has accumulated.
B. Visually assure proper pilot operation.
STAINLESS STEEL SURFACES
1. To remove normal dirt, grease and product residue from stainless steel that operates at LOW
temperature, use ordinar y soap and water (with or without deterg ent) applied with a spo nge or clot h. Dry
thoroughly with a clean cloth.
2. To remove grease and food s platter, or condensed vapors , that have BAKED on the equipment, apply
CLEANING
cleanser to a dam p cloth or sponge a nd rub cleanser on the metal in th e direction of the po lishing l ines
on the metal. Rubbing cleanser, as gent ly as possible, in th e direction of the po lished lines wil l not mar
the finish of the stainless steel. NEVER RUB WITH A CIRCULAR MOTION. Soil and burnt deposits
which do not respond to the above procedure can usually be removed by rubbing the surface with
SCOTCH-BRITE scouring pads or STAINLESS scouring pads. DO NOT USE ORDINARY STEEL
WOOL, as any particles left on the surface will rust and further spoil the appearance of the finish.
NEVER USE A WIRE BRUSH, ST EEL SCOURING PADS (EXC EPT STAINLESS), SCRAP ER, FIL E O R
OTHER STEEL TO OLS. Surfaces whic h are marred c ollect dirt more r apidly and becom e more diff icult
to clean. Marring also increases the possibility of corrosive attack. Refinishing may then be required.
3. To remove heat tint – Dark ened areas sometimes appear on stain less steel surfaces where the are a
has been subjected to excessive heat. Thes e dark ened areas ar e caused b y thick ening of the pr otective
surface of the stainless steel and ar e not harmful. Heat t int can normally be rem oved by the foregoin g,
but tint which does not r espond to this procedure calls for a vigorous scouring in the direction of the
polish lines, usin g SCOTCH-BRIT E scouring pads or a STAINLES S scouring pad in combinat ion with a
powered cleanser. Heat tint action m ay be lessened by not ap plying, or by reducing he at to equipment
during slack periods.
BURNERS – GENERAL
Little attention is needed, but if spi llage should occur, it ma y be necessary to clean around pi lot areas, air
mixer and under burners. Use a wire brush if necessary.
Periodically, burn ers (partic ularl y open top t ype) shoul d be rem oved and cl eaned. Al low interi or to drai n. Dr y
thoroughly before replacing.
PAGE 14 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE CLEANING
CARE OF GRIDDLES
New griddles should be car efully tempered and c ared for in order to a void possible dam age. To break in a
new griddle, firs t wipe it clean. Next, light all the gr iddle burners and turn them to low for one hour. Then
gradually bring eac h gridd le up to f r ying temper ature. Nex t, sprea d thre e or four ounc es of be ef suet, or as a
substitute, baking soda , to season it. Never allo w water on a hot griddle and never wash it with soap and
water.
Use a Norton Alundum Griddle Brick to clean the griddle . Always remem ber to heat griddle slo wly because
quick heat may cause costly damage. Griddle plates cannot be guaranteed against damage due to
carelessness. Never place utensils on griddle. Do not overheat griddle above 550°F, as this will cause
warpage or breakage.
Do not use any type of s teel wool. Sm all particles m ay be left on the surf ace and get into f ood products. D o
not clean spatula by hitting the edge on the griddl e plate. Such action will only cut and pit t he griddle plate,
leaving it rough and hard to clean.
Do not waste gas or abuse equipment by leaving valves at “Full On” position or thermostat at a high
temperature if not required. During idle periods, set valves at “Low” position or thermostats to low
temperature settings to keep griddl e warm. Reset valves or thermostats, as r equired, for periods of heavy
load. Turn valves or thermostats to “OFF” at end of daily operation.
CLEANING
OPERATOR’S MANUAL 1178822 REV 3PAGE 15
ADJUSTMENTS MEDIUM DUTY COUNTERLINE
ADJUSTMENTS
! WARNING
ADJUSTMENTS AND SERVICE WORK MAY BE PERFORMED ONLY BY A QUALIFIED
TECHNICIAN WHO IS EXP ERIENCED IN, AND KNOW LEDGEABLE WITH, THE O PERATION OF
COMMERCIAL COOKING EQUIPMENT. HOWEVER, TO ASSURE YOUR CONFIDENCE,
CONTACT YOUR AUTHORIZED SERVICE AGENCY FOR RELIABLE SERVICE, DEPENDABLE
ADVICE OR OTHER ASSISTANCE, AND FOR GENUINE FACTORY PARTS.
In case of problem s in opera tion at i nitial i nstallat ion, check t ype of gas an d m anifold pres sure and com pare
with information listed on the serial plate.
GAS PRESSURE REGULATOR
The convertible press ure regu lator is f actory set at 4" W .C. for natur al gas. (To convert for use with prop ane
gas (10" W.C.), follow the procedure on page 9.) To check the manifold pressure:
1. Turn all burner valves to “OFF” position.
2. Turn main gas valve to entire unit off.
3. Remove front panel and locate 1/8" plug in manifold.
4. Remove plug and install a fitting appropriate to connect a manometer.
5. Turn on main gas to unit and light pilots.
6. Turn all burners and ovens to full “ON” position and read manometer.
7. If manometer does not rea d 4" W.C. for natur al gas (or 10" W .C. for propane gas), check the incom ing
gas line for proper pressure.
8. Remove manometer fitting and replace plug in manifold.
9. Repeat step 5.
10. Replace front panel.
ADJUSTMENTS
TOP PILOTS: NON-AERATED (YELLOW-TIPPED FLAME) TYPE
Outage is often caus ed by an unsta ble flam e due to over-adj ustment to th e point wher e the flam e is leavi ng
its port, or “blowing off.”
Often, in an effort to improve ignition, the pilots are increased too much and result in this unstable condition.
These pilots are adjusted by inserting the b lade of a scre wdriver into the s lot on the small valve, located on
the manifold. The m aximum flame size is appr oximately 3/4" with a s light yellow tip. The first indicat ion of
over-adjustment is evident when the yellow tip begins to stream into black streaks and generate carbon.
Continued over-adjustment leads to the unstable lifting and blowing condition.
ALL TOP BURNERS
All burners have a primary air adjustment by means of an air shutter on the mixer face.
Loosen screw and rotate mixer cap until a clear, stable blue flame is obtained. The flame should not be
yellow tipped nor should it blow off the burner ports.
PAGE 16 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE ADJUSTMENTS
All orifice sizes and burner rate are properly set at the factory and should not be altered.
Over-rated burners cause poor burner and pilot performance, resulting in less heat, and wasted gas.
Over-gassed burners DO NOT heat griddles as efficiently as those that are properly adjusted. Such
conditions also cre ate “hot spo ts” on griddles . Floating an d unstable burner and pi lot flam es will result when
solid tops are lowered into position beca use the rear ope nings of the burn er compartm ent are not adequate
to vent the enormous flue products gen erated b y over-gassed bur ners. The “unb urned” gas will i gnite at the
rear and burn in th is section and even up ins ide the backguard or shelf venting system, causing s tructural
members in this area t o deteri orate. Als o, som e of these ho t flue produc ts will vent for ward into t he m anifold
compartment resulting in problems with valves and thermostats due to overheating. AGAIN, over-rated
burners waste energy and cause service problems.
SNAP-ACTION THERMOSTATIC VALVE
Thermostatic-griddle models have snap-action thermostatic valves that are adjusted at the factory. If the
griddle surface temperature is different from the thermostat dial setting, adjust the valve (see Figure 6
below).
Figure 6
Thermostat Calibration Screw
Calibrate the valve using the screw at the base of the stem. Turn the screw clockwise to
increase the temperature, or counterclockwise to decrease the temperature.
ADJUSTMENTS
OPERATOR’S MANUAL 1178822 REV 3PAGE 17
TROUBLESHOOTING MEDIUM DUTY COUNTERLINE
TROUBLESHOOTING
Consult the following table and the flowchart that begins on the following page.
Problem Look for -
All burners and pilots in unit will not turn on – Main gas supply to unit is “OFF.”
All burners produce excessive carbon deposits – Incorrect gas type supplied to unit.
– Incorrect supply pressure.
Only some burners in a unit produce excessive carbon
deposits
Only some pilots produce excessive carbon deposits – Pilot gas not adjusted properly.
Top burner will not come on – Manual valve for top burner in “OFF” position.
Top section pilot will not stay ignited
Lava-rock charbroiler has “hot spots” – Stacked-up lava-rock briquettes. The briquettes should be
– Incorrect orifices.
– Primary air not adjusted properly.
– Incorrect pilot orifice.
– Pilot out.
– Pilot gas not adjusted properly.
– Clogged orifice.
– Draft condition.
– Improper ventilation system.
– Air in gas line.
spread out evenly.
TROUBLESHOOTING
PAGE 18 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE TROUBLESHOOTING
OPEN TOP BURNER
TROUBLESHOOTING.
Common checks for all top configurations.
Check that the burners are set
level in the support brackets.
Check that the burners are
clean and all ports are clear.
Remove each burner and
check that the venturi is clean
and free of buildup and debris.
With each burner removed
check that the orifice size is
correct and clean and free of
buildup and debris.
Remove the knobs and carefully
lower the top valve cover panel.
NOTE: Griddle Tops
NOTE: Griddles must be
raised and secured or
removed.
CAUTION! Before
raising or removing
Griddle Tops.
Remove the knobs and
carefully lower the top
valve cover panel.
Check that each burner valve and
orifice is in alignment with the burner.
Shut off the main gas supply.
Install a pressure tap in the main
gas line before the range pressure
regulator and install a manometer.
Turn on the main gas supply.
Re-light all pilots.
Light all burners on the range.
Observe the inlet pressure .
Inlet pressures for gases are:
Natural = 5 to 7 in. water column.
Propane = 11 to 14 in. water column.
If the inlet pressure is low, all
equipment on the main gas line
should be lit and the pressure
adjusted.
Shut off the range burners
and main gas and remove
the pressure tap.
Continue on next page.
TROUBLESHOOTING
OPERATOR’S MANUAL 1178822 REV 3PAGE 19
TROUBLESHOOTING MEDIUM DUTY COUNTERLINE
Continued from
Previous Page
With the gas supply shut off,
install a pressure tap on the
manifold in the plugged tap
provided.
Install a manometer on
the pressure tap.
Turn on the gas
supply to the range.
Re-light the pilots and
turn on all the burners.
Observe the manifold pressure.
Manifold pressures are:
Natural gas = 4 in. water column.
Propane gas = 10 in. water column.
If the pressure is low, check the
incoming line for obstructions.
Shut off the burners and
main gas and remove the
pressure tap.
Replace the pressure tap
plug in the manifold.
Re-light the pilots.
Test each burner.
Each burner should have
a steady blue flame on
each port of the burner.
Propane burners may have a
small amount of yellow
tipping. This is normal.
If the flame is rising up off
of the ports adjust the
burner shutter closed.
If the flame is long and
yellow adjust the burner
shutter open.
NOTE: Griddle burners may
be long and float when cold.
Allow the top to heat before
making burner adjustments.
Install the grates or
griddle tops.
TROUBLESHOOTING
PAGE 20 OPERATOR’S MANUAL 1178822 REV 3
Propane burners may
have a slight popping
noise when turned off.
This is normal.
Reinstall the front
panel and knobs.
MEDIUM DUTY COUNTERLINE PARTS
PARTS
NOTICE
INSTALLATION OF OTHER THAN GENUINE SOUTHBEND PARTS WILL VOID T HE WARRANTY
ON THIS EQUIPMENT.
The serial plate is located inside of the front panel (see Figure 1 on page 3).
Replacement parts may be ordered either thr ough a Southbend Auth orized Parts Dis tributor or a S outhbend
Authorized Service Agency.
When ordering parts, please supply the Model Number, Serial Number, Part Number, and Description.
For parts not listed, consult a Southbend Authorized Parts Distributor or Southbend Authorized Service
Agency. Consult the Southbend Authori zed Parts/Servic e Distributor list f or the Authorized P arts supplier in
your area. If this list is not available, call Southbend at 1-800-348-2558 to obtain this list.
Index of Parts Diagrams
Page Number Description
22 Parts for Griddle Models MDG-24, MDG-36, and MDG-48
24 Parts for Thermostatic-Griddle Models MDGT-24, MDGT-36, and MDGT-48
26 Parts for Charbroiler Models MDC-24, MDCL-24, MDC-36, MDCL-36, MDC-48, and MDCL-48
28 Parts for Open-Top Models MDO-12, MDO-24, and MDO-36
OPERATOR’S MANUAL 1178822 REV 3PAGE 21
PARTS
PARTS MEDIUM DUTY COUNTERLINE
Medium Duty Counterline Griddle Parts
See drawing on following page.
Key Part Number Qty Description
1 1177704 ** Knob
2 1178840 1 Front panel, 24" (for Model MDG-24)
1178842 1 Front panel, 36" (for Model MDG-36)
1178843 1 Front panel, 48" (for Model MDG-48)
3 1178826 1 Tailpipe
4 1172857 4 Legs (set of four)
5 1178836 ** Burner
6 1178801 1 Griddle wel d assembly, 24" (for Model MDG-24)
1178802 1 Griddle weld assembly, 36" (for Model MDG-36)
1178803 1 Griddle weld assembly, 48" (for Model MDG-48)
7 1178890 1 Flue riser, 24" (for Model MDG-24)
1178891 1 Flue riser, 36" (for Model MDG-36)
1178892 1 Flue riser, 48" (for Model MDG-48)
8 1038099 ** Pilot
9 1178816 ** Pilot exten sion
10 1178821 ** Pilot adjustment valve
11 1008745 ** Orifice, natural #45
1008755 ** Orifice, propane #55
12 1178202 ** Valve
13 1178845 1 Manifold weld assembly, 24" (for Model MDG-24)
1178895 1 Manifold weld assembly, 36" (for Model MDG-36)
1178896 1 Manifold weld assembly, 48" (for Model MDG-48)
14 1178886 1 Grease drawer, 12" (for Models MDG-36 and MDG-48)
1178923 1 Grease drawer, 6" (for Model MDG-24)
15 1178817 ** Pilot bracket
* 1178815 1 Pressure regulator, nat/LP
* 1181735 1 Poly panel, 24" (for Model MDG-24)
1181736 1 Poly panel, 36" (for Model MDG-36)
1181737 1 Poly panel, 48" (for Model MDG-48)
* Not shown on drawing.
** One per griddle section (total of two for a Model MDG-24, three for a Model MDG-36, or four for a Model MDG-48).
PARTS
PAGE 22 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE PARTS
Medium Duty Counterline Griddle Parts
See parts list on previous page. Model MDG-36 is shown.
9
10
12
2
1
8
7
11
6
5
15
13
4
3
OPERATOR’S MANUAL 1178822 REV 3PAGE 23
14
PARTS
PARTS MEDIUM DUTY COUNTERLINE
Medium Duty Counterline Thermostatic-Griddle Parts
See drawing on following page.
Key Part Number Qty Description
1 1182586 ** Knob
2 1178988 1 Front panel, 24" (for Model MDGT-24)
1181400 1 Front panel, 36" (for Model MDGT-36)
1181408 1 Front panel, 48" (for Model MDGT-48)
3 1163506 1 Tailpipe
4 1172857 4 Legs (set of four)
5 1178836 ** Burner
6 1178982 1 Griddle wel d assembly, 24" (for Model MDGT-24)
1178996 1 Griddle weld assembly, 36" (for Model MDGT-36)
1181404 1 Griddle weld assembly, 48" (for Model MDGT-48)
7 1178890 1 Flue riser, 24" (for Models MDG-24 & MDGT-24)
1178891 1 Flue riser, 36" (for Models MDG-36 & MDGT-36)
1178892 1 Flue riser, 48" (for Models MDG-48 & MDGT-48)
8 1038099 ** Pilot
9 1178816 ** Pilot exten sion
10 1178821 ** Pilot adjustment valve
11 1008745 ** Orifice, natural #45
1008755 ** Orifice, propane #55
12 1182553 ** Valve
13 1178986 1 Manifold weld assembly, 24" (for Model MDGT-24)
1178998 1 Manifold weld assembly, 36" (for Model MDGT-36)
1181406 1 Manifold weld assembly, 48" (for Model MDGT-48)
14 1178886 1 Grease drawer, 12" (for Models MDG-36, MDGT-36, MDG-48, and MDGT-48)
1178923 1 Grease drawer, 6" (for Models MDG-24 and MDGT-24)
15 1178817 ** Pilot bracket
16 1178991 *** Di vider, cavity
17 1181498 ** Probe support weld assembly
18 1178149 ** Clamp, probe
19 1179932 ** Spring
20 1180581 ** Probe support base weld assembly
21 1180582 ** Heat shield
22 1-5771 1 Manual gas supply on-off valve
* 1178815 1 Pressure regulator, nat/LP
* 1178990 1 Poly panel, 24" (for Model MDGT-24)
1181402 1 Poly panel, 36" (for Model MDGT-36)
1181410 1 Poly panel, 48" (for Model MDGT-48)
* Not shown on drawing.
** One per griddle section (total of two for a Model MDGT-24, three for a Model MDGT-36, or four for a Model MDGT-48).
*** One between each griddle section (one for a Model MDGT-24, two for a Model MDGT-36, or three for a Model MDGT-48).
PARTS
PAGE 24 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE PARTS
Medium Duty Counterline Thermostatic-Griddle Parts
See parts list on previous page. Model MDGT-36 is shown.
19
17
12
18
20
6
11
15
5
8
10
9
7
21
13
3
1
2
22
14
16
4
PARTS
OPERATOR’S MANUAL 1178822 REV 3PAGE 25
PARTS MEDIUM DUTY COUNTERLINE
Medium Duty Counterline Charbroiler Parts
See drawing on following page.
Key Part Number Qty Description
1 1177704 ** Knob
2 1178840 1 Front panel, 24" (for Models MDC-24 and MDCL-24)
1178842 1 Front panel, 36" (for Models MDC-36 and MDCL-36)
1178843 1 Front panel, 48" (for Models MDC-48 and MDCL-48)
3 1178826 1 Tailpipe
4 1172857 4 Legs (set of four)
5 1178836 ** Burner
6 1178902 ** Charbroiler radiant
7 1182659 1 Charbroiler assem bly, 24" (for Models MDC-24 and MDCL-24)
1182676 1 Charbroiler assembly, 36" (for Models MDC-36 and MDCL-36)
1182677 1 Charbroiler assembly, 48" (for Models MDC-48 and MDCL-48)
8 1038099 ** Pilot
9 1178816 ** Pilot exten sion
10 1178821 ** Pilot adjustment valve
11 1008745 ** Orifice, natural #45
1008755 ** Orifice, propane #55
12 1178202 ** Valve
13 1178845 1 Manifold weld assembly, 24" (for Models MDC-24 and MDCL-24)
1178895 1 Manifold weld assembly, 36" (for Models MDC-36 and MDCL-36)
1178896 1 Manifold weld assembly, 48" (for Models MDC-48 and MDCL-48)
14 1178886 1 Grease drawer, 12" (for Models MDC-24 an d MDCL-24)
1178841 1 Grease drawer, 26" (for Models MDC-36, MDCL-36, MDC-48, and MDCL-48)
15 1178817 ** Pilot bracket
16 1172781 *** Gri d, charbroiler
17 1182657 *** Grate, lava-rock (for MDCL models only)
* 1173193 ** Briquettes, bag (for MDCL models only)
* 1178815 1 Pressure regulator, nat/LP
* 1181735 1 Poly panel, 24" (for Models MDC-24 and MDCL-24)
1181736 1 Poly panel, 36" (for Models MDC-36 and MDCL-36)
1181737 1 Poly panel, 48" (for Models MDC-48 and MDCL-48)
* Not shown on drawing.
** One per charbroiler section (total of two for a Model MDC-24 or MDCL-24, three for a Model MDC-36 or MDCL-36, or four for a Model
MDC-48 or MDCL-48).
*** Two per charbroiler section (total of four for a Model MDC-24 or MDCL-24, six for a Model MDC-36 or MDCL-36, or eight for a Model
MDC-48 or MDCL-48).
PARTS
PAGE 26 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE PARTS
Medium Duty Counterline Charbroiler Parts
See parts list on previous page. Model MDCL-36 is shown.
9
10
8
11
12
2
1
13
16
17
7
6
5
15
3
4
14
OPERATOR’S MANUAL 1178822 REV 3PAGE 27
PARTS
PARTS MEDIUM DUTY COUNTERLINE
Medium Duty Counterline Open Top Parts
See drawing on following page.
Key Part Number Qty Description
1 1177704 *** Knob
2 1178971 1 Front panel, 12" (for Model MDO-12)
1178969 1 Front panel, 24" (for Model MD0-24)
1178970 1 Front panel, 36" (for Model MD0-36)
3 1178944 1 Tailpipe
4 1172857 4 Legs (set of four)
5 1177439 ** Burne r, rear
6 1177111 ** Burne r, front
7 1181100 *** Grate, counter top
8 1178942 ** Pilot, rear
9 1178941 ** Pilot, front
10 1166004 *** P ilot adjustment valve
11 1008745 *** Ori fice, nat ural #45
1008755 *** Orifice, propane #55
12 1178202 *** Valve
13 1178960 1 Manifold weld assembly, 12" (for Model MDO-12)
1178936 1 Manifold weld assembly, 24" (for Model MDO-24)
1178959 1 Manifold weld assembly, 36" (for Model MDO-36)
14 1178966 1 Grease drawer, 12" (for Model MDO-12)
1178973 1 Grease drawer, 24" (for Model MDO-24)
1178965 1 Grease drawer, 36" (for Model MD0-36)
15 1178940 ** Pilot bracket
16 1178958 1 Front rail, 12" (for Model MDO-12)
1178934 1 Front rail, 24" (for Model MDO-24)
1178957 1 Front rail, 36" (for Model MDO-36)
* 1178815 1 Pressure regulator, nat/LP
* 1181738 1 Poly panel, 12" (for Model MDO-12)
1181739 1 Poly panel, 24" (for Model MDO-24)
1181740 1 Poly panel, 36" (for Model MDO-36)
* Not shown on drawing.
** One per open-top section (total of one for a Model MDO-12, two for a Model MDO-24, or three for a Model MDO-36).
*** Two per open-top section (total of two for a Model MDO-12, four for a Model MDO-24, or six for a Model MDO-36).
PARTS
PAGE 28 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE PARTS
Medium Duty Counterline Open Top Parts
See parts list on previous page. Model MDO-36 is shown.
6
9
8
5
7
12
10
11
2
1
16
13
3
15
4
14
OPERATOR’S MANUAL 1178822 REV 3PAGE 29
PARTS
MEDIUM DUTY COUNTERLINE
PAGE 30 OPERATOR’S MANUAL 1178822 REV 3
MEDIUM DUTY COUNTERLINE
OPERATOR’S MANUAL 1178822 REV 3PAGE 31
MEDIUM DUTY COUNTERLINE
MEDIUM DUTY COUNTERLINE
A product with the So uthbend name incor porates the best in dur ability and low m aintenance. We
all recognize, however, that replacement parts and occasional professional service may be
necessary to extend the useful life of this unit. When service is needed, contact a Southbend
Authorized Service Agenc y, or your dea ler. T o a void conf usion, alwa ys refer to the m odel num ber ,
serial number, and type of your unit.
Southbend
1100 Old Honeycutt Road, Fuquay-Varina, NC 27526
(800) 348-2558 or (919) 552-9161 • FAX (800) 348-2558 or (919) 552-9798
PAGE 32 OPERATOR’S MANUAL 1178822 REV 3
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