This manual is intended for the use of Southbend Authorized Service Agencies and their
associates.
Service work should be performed only by a qualified technician who is experienced in, and
knowledgeable of, the operation of commercial gas, electric, and steam cooking
Improper installation, service, or maintenance can cause property damage,
Warranty will be void and the manufacturer is relieved of all liability if:
(A) Service work is performed by other than a qualified technician.
(B) Other than genuine Southbend replacement parts are installed.
TABLE OF CONTENTS:
Location of serial and identification name plates:
The serial plate with all specifications is located below the oven door, behind the kick panel, attached to the frame base of the oven. There is also
a product identification plate that has only the model and serial number attached to the front left corner of the valve panel.
FOR INSTALLATION AND OPERATION INSTRUCTIONS - CONSULT OPERATOR'S MANUAL
The following symbols, found throughout this manual, alert you to potentially dangerous conditions to the operator, service
personnel, or to the equipment.
DANGER
WARNING
CAUTION
NOTICE
MIDDLEBY COMPANY
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,
Total 85,000 BTU. One 3/4" flex hose male connection.
(for location, see drawing above items "L" and "M").
Required operating pressure: Natural Gas 4" W.C.
Propane Gas 10" W.C.
than 3/4" I.D.
14.25"
(362)
3
(20,000)
PAGE 3
1
(25,000)
55"
(1397)
45.5"
(1156)
45"
(1143)
118 cu. ft.
3.33 cu. m.
ELECTRIC STANDARD: 115/60/1 - furnished with 5 ft. cord w/ 3-prong
plug. Total maximum amps 6.2.
OPTIONAL: 208/60/1 or for use on 3 (190 to 219 volts) - supply
OPTIONAL: 240/60/1 or for use on 3 (220 to 240 volts) - supply
must be wired to junction box with terminal block located at
must be wired to junction box with terminal block located at
rear. Total maximum amps 4.0.
705 lbs.
317kg.
Page 5
ADJUSTMENTS
BLOWER
De-energize all power to equipment before attempting to service or replace any
component of the equipment.
When changing motor or servicing unit, always verify that the blower wheel rotation
is as the illustration shows. (clock-wise when looking into oven cavity)
WHEEL
ROTATION
WARNING
CAUTION
FIGURE 1
ONLY on units manufactured before serial numbers 91 H
Blower wheel must not be located over 1/8" from rear of
oven. This is critical for proper burner combustion.
A. MOTOR: The motor is serviceable from the front of the unit through the oven cavity. Remove the rear baffle. Disconnect
the motor mount plate by removing the eight hex nuts that secure it to the oven interior back. Pull the mount plate, with motor
attached, into the oven.
B. CONTROL PANEL ASSEMBLY COMPONENTS: The control panel assembly components are easily serviceable by
removing two screws (one at the top and at the bottom) of the control panel and then sliding out the control panel assembly.
C. THERMOSTAT: After sliding out the control box assembly, the thermostat can be completely removed by removing the
capillary bulb brackets from inside of the oven, and then sliding the capillary bulb out of the oven cavity into the control area.
Before sliding out control box for servicing, remove base panels below oven door and
remove the wire tie from the spark ignitor electrode wire (black wire).
To return control box to original position, push in slowly while lightly pulling the spark ignitor
wire (black wire) into the oven burner control area (below oven door). Re-attach a wire tie
CAUTION
in a similar fashion as before it was removed. Replace base panels.
PAGE 4
Page 6
ADJUSTMENTS
THERMOSTAT ADJUSTMENT OVEN:
3. Turn on the blower.
competent serviceman.
3. 1/4
turn c
hanges the temperature 35°F.
1.
3.
orifice bracket screws (Item "B").
4.
The calibration of the thermostat should not be changed until sufficient experience with cooking results have definitely proved that the
thermostat is not maintaining proper oven temperatures. Before any recalibration is attempted, the oven temperature should be checked
by the following procedure:
1. The oven must be empty of all trays or pans.
2.Place a pyrometer thermocouple or a reliable mercury oven-type thermometer at the center of the middle rack.
4.Set the dial at 375° F.
5. The red "Cooking Light will go out when the thermostat turns off the burners.
6. Allow three such cycles for the temperature to stabilize.
7.Read the pyrometer or thermostat immediately after the light goes out for the third time and again immediately after it
comes on the next time.
8.If the average of these readings and the dial setting vary by more than 15°, recalibrate by following the instructions
outlined below:
TO RECALIBRATE:
NOTE:Recalibration should be attempted only by a
1.Remove knob from dial shaft (Item "B") from
figure 2.
2.Turn screw (Item "A") in figure 2 clockwise to
decrease and counterdockwise to increase
temperature.
4.Replace knob on dial shaft.
5.After the calibration is made, set the dial at
375°F and recheck the oven temperature using
the method outlined by steps 1 thru 7 of the
oven temperature checking procedure (as
stated above).
OVEN STANDING PILOT ADJUSTMENT:
The standing oven pilot flame can be adjusted by turning
the adjusting screw on the pilot line valve with a
screwdriver. The pilot line valve is located behind the front
FIGURE 2
panel below the oven door.
Remove the front panel to gain accessibility. The pilot flame is property adjusted when it is just large enough to maintain a
glowing red color on the flame switch capillary bulb.
OVEN BURNER FLAME ADJUSTMENT:
The oven burner orifice is of the fixed, type sized for the respective gas supply. The burner flame characteristics are
controlled by varying the primary air mixer cap. There should be a clear blue flame with a distinct inner cone at each port.
Excessive primary air can result in "blowing" or the flames leaving the ports. Lack of primary air causes soft or yellow
tipped flame.
THERMOSTAT REMOVAL AND REPLACEMENT:
(GRIDDLE DOESN'T HAVE TO BE REMOVED)
Refer to figures 3 and 4 for instructions below.
Remove thermostat knob(s).
2. Remove valve panel.
Remove thermostat screw (Item "A") and
Pull thermostat assembly out to side and
remove the burner (Item "C") [this applies for
both sides].
FIGURE 3
PAGE 5
Page 7
ADJUSTMENTS
THERMOSTAT REMOVAL AND REPLACEMENT: (Continued)
5. Loosen bolt(s) on bottom of griddle plate (Item "D") 1/2 inch then pull thermostat bulb out front.
NOTE: If bulb will not pull out loosen bolt (Item "D") further (DO NOT FORCE).
6. Reverse steps 3 thru 5 to install new thermostat.
NOTE: Snug bolt (Item "D") DO NOT over tighten, (this will damage capillary bulb causing incorrect sensing).
7. Make sure the excess capillary wire is stored in the cool zone under thermostat body in front of burners.
8. Replace valve panel.
9. Replace thermostat knob(s),
FIGURE 4
PRESSURE REGULATOR:
The pressure regulator is factory set a 7-8" W.C. for natural gas and 11-12" W.C. for propane gas. To check the manifold
pressure:
1. Turn all thermostats and burner valves to "OFF" position.
2. Turn main gas valve to entire unit off.
3. Remove valve panels 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 read 4" W.C. for natural gas,
or 10" W.C. for propane gas, adjust regulator (if gas pressure
is O.K. go to step 10)
8. Remove cap form top of regulator.
9. With a screwdriver rotate regulator adjustment screw
"Clockwise" to increase, or "counterclockwise" to decrease,
pressure until manometer shows correct reading.
10. Repeat steps 1 and 2.
11. Remove manometer fitting and replace plug in manifold.
12. Repeat step 5.
13. Replace valve panels.
FIGURE 5
PAGE 6
Page 8
ADJUSTMENTS
FIGURE
7
THERMOSTAT CALIBRATION GRIDDLE:
FIGURE 6
TO RECALIBRATE THERMOSTAT:
This control has been carefully calibrated at the factory. That is, it is adjusted
to match the actual griddle temperatures. Field calibration is seldom necessary
and it should NOT be done unless considerable experience with cooking and
temperatures definitely proves that the control is not maintaining the temperatures
to which the dial is set.
1. When recalibrating, check temperatures as instructed in
previous section (thermostat calibration)
2. Set temperature indicator knob to 300°F marking
3. Remove indicator knob (Item "A") from thermostat
(Item "B"). Refer to figure 7.
4. Using a screwdriver knock out silver insert
(Item "C"). Refer to figure 7.
5. Place knob back on the thermostat shaft.
6. With screwdriver inserted through center
of dial and in the calibration slot of screw push in
and hold - DO NOT rotate screw.
7. Rotate indicator mark until it points to actual temperature you are reading off the temperature sensing
device you placed over the center of the burners.
8. Turn thermostat to 300°P and check temperature again at 5 minute intervals.
9. Remove indicator knob and reinstall center insert.
10. If the griddle will not adjust to within 30°F this means that the sensing bulb is inoperative and the control
should be replaced.
To Check Calibration
1. Turn thermostat to the 300°F of marking see figure 5.
2. After burners have been on a minimum of 1 hour (if cold)
or 30 minutes (if already hot when set at 300°F). Place a
reliable thermometer or therm-couple with test instruments
in the center of the griddle and over the center of each
burner. See figure 6.
3. Continue to check temperatures at 5 minute intervals, until
you have two readings that are within 30° of each other.
4. The control should only be recalibrated if your reading is
not within 30° of the dial setting (300°F).
FIGURE 8
PAGE 7
Page 9
TROUBLESHOOTING GUIDE
Symptom Check or Replace
1) All burners and pilots in unit will not turn on A) Main gas supply to unit is "OFF".
A) Incorrect gas type supplied to unit. 2) All burners produce excessive carbon deposits
B) Incorrect supply pressure.
A) Incorrect orifices. 3) Only some burners in a unit produce excessive carbon
deposits
B) Primary air not adjusted properly.
A) Pilot gas not adjusted properly. 4) Only some pilots produce excessive carbon deposits
B) Incorrect pilot orifice.
A) Manual valve for top burner in "OFF" position. 5) Top burner (not oven) will not come on
B) Pilot out.
6) Top section pilot will not stay ignited
7) Unit will not heat up
8) Burners produce excessive carbon deposits
A) Pilot gas not adjusted property.
B) Clogged orifice.
C) Draft condition.
D) Improper ventilation system.
E) Air in gas line.
A) Main gas supply is "OFF".
B) Pilot not lit.
C) Safety valve not "ON".
A) Incorrect gas type or orifice size.
B) Incorrect supply pressure.
C) Incorrect burner air mixer adjustment.
D) Burner orifice out of alignment with burner.
E) Incorrect orifices.
A) Pilot gas not adjusted properly. 9) Pilot produces excessive carbon deposits
10) Burner will not come on
11) Pilot will not stay lit
B) Incorrect pilot orifice.
A) Safety valve in "Pilot" position.
B) Pilot out.
C) Clogged burner - charge ports.
A) Pilot was not adjusted properly.
B) Clogged or dirty orifice.
C) Draft condition.
PAGE 8
Page 10
TROUBLESHOOTING GUIDE
Symptom Check or Replace
D) Improper ventilation systems.
E) Air in gas line.
F) Valve end of thermocouple corroded or loose.
G) Pilot shield needs to be moved closer to pilot.
H) Improper gas pressure.
I) Incorrect gas supply size (not enough volume).
CONVECTION OVEN ONLY
12) Unit does not come on when "Power Switch" is in the
"On" position.
14) Motor will not run in "Bake" position but runs in "Cool"
position.
16) Spark present but standing pilot will not light
A) Is power cord plugged in?
B) Main supply fuses.
C) Unit power switch.
A) Fan switch. 13) Motor will not run with fan switch in any position
B) Motor.
A) Door switch actuator.
B) Door switch.
A) Spark ignitor. 15) No spark at pilot
B) Wire to spark electrode broken or disconnected.
A) Gas supply to unit shut off.
B) Unit gas line shutoff in closed position.
C) Pilot line valve in closed position.
17) Pilot ignites but burners will not light when thermostat
calls for heat. Cook light on.
18) Unit will function property for a period of time and then
shut down (oven circulating blower and oven burners).
Oven will begin to function properly again after it has
cooled down.
19) Pilot ignites but burners and cook light will not come on
when thermostat calls for heat.
D) Pilot line solenoid.
E) Oven gas supply "Manual" valve off.
A) Main gas solenoid.
B) Flame switch bulb in incorrect position (Flame needs to
split bulb).
C) Flame switch.
A) Motor overheating.
A) Thermostat.
PAGE 9
Page 11
PERFORMANCE CHECK:
The following items should be checked within the first 30 days of operation by a qualified service technician.
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.
10. Verify proper type of gas.
11. Verify gas supply and pressure. (Pressure regulator is already installed at factory.)
12. Check gas connection and check for leaks.
It is common for new products to require a bum-off time to dry out insulation and metal cooking surfaces.
PAGE 10
Page 12
PAGE 11
Page 13
PAGE 12
Page 14
PARTS -- ACCESSORIES
NOTICE
INSTALLATION OF OTHER THAN GENUINE SOUTHBEND PARTS WILL VOID THE
WARRANTY ON THIS EQUIPMENT.
The serial plate with voltage, model, and serial information is located below oven door, behind the kick panel attached to
frame base of oven. There is also an Identification Plate mounted to the front left comer of the valve panel that will supply
model and serial number.
Replacement parts may be ordered either through a Southbend Authorized Parts Distributor or a Southbend
Authorized Service Agency.
When ordering parts, please supply the Model Number, Serial Number, Part Number, Description, Finish, and
Electrical Characteristics as applicable.
Consult the Southbend Authorized Parts/Service Distributor list for the Authorized Parts supplier in your area. If this list is
not available, call the Service Department at Southbend, 1-800-348-2558 for same.
Gas Conversion Kits for Wendy's 93A and 94A Series Models
4440422 - CO-300HT-93A - Propane to Natural
4440423 - CO-300HT-93A - Natural to Propane
4440424 - CO-301HT-93A - Propane to Natural
4440425 - CO-301HT-93A - Natural to Propane
C0300 with three hot tops or one solid top
4440051 Natural to Propane
4440050 Propane to Natural
REPLACEMENT PART INDEX
Legs, CastersPages 14-15
Main Exterior Parts C0301HT & C0300HTPages 16-17
Front Body Parts
Control Panel ComponentsPage 19
Oven Interior Parts
Oven Burner CompartmentPages 22-23
Manifold ComponentsPage 24
Hot Top Manifold
Gas Supply Line ComponentsPage 27
Flue Riser Body PartsPage 28
A 1176423 Flue Pan Deflector
B 1146304 #10 x 1/2 Phillip Screw
C 1176168 Hot Top 12" Assembly
D 1176143 Grease Shield
E 1176145 Griddle Asm. 2ft.
F C05-00093 Belly Bar Assembly
G 1166011 Hot Top Knob
H 1176150 Grease Pan Assembly
I 4440000 Oven Door Handle Kit
J 1174762 Griddle Knob
K 1176119 Direct Sparker
L 1173578 Base Panel S/S
M 1165701 Thermostat Dial Knob
N 1173444 Timer Dial
0 1172748 Southbend Logo Plate
* 1165652 Oven Rack (18 x 25 13/16)
• 1176866 Quick Disconnect Hose 36"
* 1176867 Restaining Device Kit
* Legs (see parts section in this manual)
• Casters (see parts section in this manual)
* Item not shown on drawing
FIGURE 14
MAIN EXTERIOR PARTS FOR C0300HT
1165732 Rack Guide Assembly
PAGE 17
Page 19
FIGURE 15
FRONT BODY PARTS
ITEM
A 1176247 - Control Panel 1
B - 1176149 Control Panel 1
C 1176139 1176319 Control Panel Support Right 1
D 1176138 1176138 Control Panel Support Left 1
E - 1176137 Grease Pan Support 1
F - 1176150 Grease Pan Assembly 1
G C05-00093 C05-00093 Belly Bar Assembly 1
H 1173578 1173578 Right Base Panel SW Assy. S/S 1
I 1165967 1165967 Left Trim 1
J 1176175 1176175 Panel, Right Front 1
K 1176141 1176141 Cut Off Valve Cover 1
L 1168183 1168183 Bracket, Base Panel 2
* Item not shown on drawing.
NOTE: If voltage on control pane! is anything other than 120 Volt, Item F will be a 101-2596 fuse holder.
Cross Reference part numbers appear in parenthesis after description.
PART NUMBER
C0300C0301
DESCRIPTIONQUANTITY
Transformer, 100 VA (1165181)
(208/240 Volts Only)
1
1
PAGE 19
Page 21
OVEN INTERIOR PARTS
ITEM
A44403674440367Motor Kit 115/60/11
B11749191174919Motor Mount Bracket1
C11659571165957Motor Mount Bolt Assembly4
D11659591165959Motor Mount Pocket Assembly1
E11655211165521Blower Wheel1
J44400004440000Oven Door Handle Kit (w screws)1
K11681891168189Left Hand Door Hinge Pin Assy.1
L11681901168190Right Hand Door Hinge Pin Assy.1
M11682081168208Oven Door S/S (1165904)1
N11762961176296Door Seal 8 ft. One Piece1
011657631165763Top Seal Retainer1
P11657641165764Side Seal Retainer2
Q11661061166106Bottom Seal Retainer1
R11661071166107Bottom Splash Guard1
S11661001166100Oven Fire Plate1
T11765831176583Tube, Solenoid to Orifice1
V11655191165519Brass Connector2
*11765851176585Solenoid Bracket1
PART NUMBER
C0300C0301
1165781
1165781
DESCRIPTIONQUANTITY
Bolt 3/8 x 16 x 4
(for door sprocket)
* Item not shown on drawing.
Cross reference part numbers appear in parenthesis after description.
† If replacing from the Eaton duel solenoid valve (pn-116-5510) first time use kit 4440430- then use for individual
solenoids (pn-117-3484)
‡ If replacing either flame switch or oven pilot on units built before Dec/1985 use 4440229 pilot and flame switch kit
to convert to current style pilot and flame switch. Old and new parts will not interchange.
PAGE 22
Page 24
FIGURE 18
PAGE 23
Page 25
Connector
1/8
to 1/4
I
MANIFOLD COMPONENTS
ITEM
A 1176113 1176113 Runner Tube Assembly 1
B 1176118 1176118 Runner Tube Orifice Support 1
C 1173574 1173574 Pilot Body 1
D 1173576 1173576 Thermocouple 1
E 1176155 1176155 Spark Electrode 1
F P5552 P5552
G 1176124 1176124 Tube 1/4 Manifold to Runner Tube 1
H 1176131 1176131 Tube 1/4 Pilot to Safety 1
J 1164149 1164149 Elbow 1/2 to 3/8 1
K 1174340 1174340 Safety Valve 1
L 1176119 1176119 Direct Sparker 1
M 1176109 1176109 Manifold Pipe Weld Assembly (only) 1
N 1058470 1058470 Orifice Spud (Propane) 1
0 1058465 1058465 Orifice Spud (Natural) 1
P 1174366 1174366 Pilot Bracket 1
PART NUMBER
C0300C0301
1081200 1081200 Fitting 1/2 to 3/8 2
DESCRIPTIONQUANTITY
2
PAGE 24
Page 26
FIGURE 20
C0300HT HOT TOP MANIFOLD
PART NUMBER
ITEM
C0300C0301
A 1176109 - Manifold Pipe Weld Assembly 1
B 1147007 - Pipe Plug 1/8 Male NPT 1
C 1081200 - Fitting, 3/8 CC x 1/2 Male NPT 1
D 1176006 - Valve, Hi-Low Natural 3
E 1176007 - Valve, Hi-Low Propane 3
F 1174948 - Connector, 1.8 NPT x 3/8 CC 3
G 1148301 - Jam Nut 3
H 1176127 - Tube 3/8 Hot Top Left 1
I 1176154 - Tube 3/8 Hot Top Riant 2
J 1148306 - Orifice Elbow 3
K 1174370 - Orifice Support 3
L 1008745 - Orifice Hot Top Natural 3
M 1008755 - Orifice Hot Top Propane 3
N 1174341 - Burner "J" Type 3
DESCRIPTIONQUANTITY
PAGE 25
Page 27
FIGURE 21
301-24 GRILL/ONE HOT TOP
ITEM
A - 1176109 Manifold Pipe Weld Assembly 1
B - 1176006 Valve, Hi-Low, Natural 1
C - 1174337 Griddle Thermostat 1
D - 1174341 Burner 1
E - 1008745 Orifice Hot TOD Natural 1
F - 1008737 Orifice Griddle Natural 1
G - 1176127 Tube 3/8 Hot Top Left 1
H - 1176154 Tube 3/8 Hot Top Right 1
I - 1176123 Tube 3/8 Thermostat Left 1
J - 1176126 Tube 3.8 Thermostat Right 1
K - 1148306 Orifice Elbow 1
L - 1148301 Jam Nut 1
M - 1174370 Orifice Support 1
N - 1147007 Plug, Pipe, BIk 1/8 M NPT 1
0 - 1081200 Fitting, 3/8 CC x 1/2 M NPT 1
PART NUMBER
C0300C0301
- 1176007 Valve, Hi-Low, Propane 1
- 1008755 Orifice Hot Top Propane 1
- 1008752 Orifice Griddle Propane 1
DESCRIPTIONQUANTITY
PAGE 26
Page 28
FIGURE 22
GAS SUPPLY LINE COMPONENTS
ITEM
A 1160205 1160205 Regulator Natural 5" 1
B 1160206 1160206 Regulator LP 10" 1
C 1146910 1146910 Elbow 3/4" Street 1
D 117-6156 1176156 Feed Pipe Support 1
E 1146831 1146831 Nipple 3/4" x 6° Long 1
F 1146904 1146904 Elbow 3/4" x 3/4" 2
G 1164078 1164078 Nipple 3/4" x 81/2" Long 1
H 1174387 1174387 Feed Pipe Weld Assembly 1
I P52444-4 P52444-4 Bell Reducer 3/4" to 1/2" 1
J P9158 P9158 Fitting 1/2" to 5/8" 2
K 11761128 1176128 Tube 5/8" Main Feed 1
L 1147122 1147122 Bell Reducer 1/2" to 3/8" 1
M 1146812 1146812 Close Nipple 3/8" 2
N 1081200 1081200 Fitting 1/2" to 3/8" 2
O 1176125 1176125 Tube 3/8" Manifold to Safety 1
P 1164149 1164149 Elbow 1/2" to 3/8" 1
Q 1174340 1174340 Safety Valve 1
R 1176130 1176130 Tube 3/8" to Safety 1
S 1165519 1165519 Fitting 3/8" to 3/8" 2
T 1147302 1147302 Tee 3/8" x 3/8" x 3/8" 1
U 1165915 1165915 Cut Off Valve 1
V 1176107 1176107 Tube 3/8" Cut Off to Safety 1
PART NUMBER
C0300C0301
DESCRIPTIONQUANTITY
PAGE 27
Page 29
FIGURE 23
FLUE RISER BODY PARTS
ITEM
A 1176423 1176423 Flue Pan Deflector 3
B 1176136 1176136 Flue Riser Top 1
C 1176133 1176133 Flue Riser Left 1
D 1176132 1176132 Flue Riser Right 1
E 1176135 1176135 Flue Riser Bottom 1
F 1173462 1173462 Wall Shield Back 1
G 1146201 1146201 Hex Head Screw 1/4-20 x 3/4 2
H 1146500 1146500 Lock Washer 1/4" 2
| 1146505 1146505 Flat Washer 5/16" 2
J 1176163 1176163 Oven Flue Box 1
K 1146304 1146304 #10 x 1/2 Sheet Metal Screws 6
PART NUMBER
C0300C0301
PAGE 28
DESCRIPTIONQUANTITY
Page 30
A product with the Southbend name incorporates the best in durability and low
1100
Old Honeycutt Road
maintenance. 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 Agency, or your dealer. To avoid
confusion, always refer to the model number, serial number, and type of your unit.