Southbend CG90-1 User Manual

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

Combination (Combi) Oven

Model CG90-1

! 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

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

MANUAL 1180963 COMBINATION OVEN
$18.00 MANUAL SECTION CB

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 gas oline or other flamm able vapors and liqu ids in the

vicinity of this or any other appliance.
Keep area around appliances free and clear of combustibles.
Purchaser of equipment m ust post in a prom inent location, d etailed instruc tions to be f ollowed in the

event the operator smells gas. Obtain the instructions from the local gas supplier.

! WARNING

SHOCK HAZARD

Do not open panels that require use of tools.
Unit must be cleaned daily and properly maintained to reduce chances of unsafe operating

conditions.

! WARNING

BURN HAZARD

Watch for clogged drain - can crate burn hazard when door is opened.
Stand back when opening doors - hot steam, hot air, and/or hot water may escape from oven.

NOTICE

Be sure this Operator's Manual and important papers are given to the proper author ity to retain for
future reference.

PAGE 2OPERATOR’S MANUAL 1180963

COMBINATION OVEN TABLE OF CONTENTS

Congratulations! You have purchased on e of the finest p ieces of heav y-duty comm ercial cook ing equipm ent
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.

Model Numbers

This manual is f or the Southbend C ombination Oven model CG 90-1 . The seria l plate is located behind the
lower front panel on the left side.

Table of Contents

Specifications..........................................................................................................................4

Installation...............................................................................................................................6

Operation ..............................................................................................................................14

Cooking Hints........................................................................................................................17

Cleaning................................................................................................................................22

Troubleshooting ....................................................................................................................24

Parts......................................................................................................................................32

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

OPERATOR’S MANUAL 1180963 PAGE 3

SPECIFICATIONS COMBINATION OVEN

SPECIFICATIONS

SPECIFICATIONS

DIMENSIONS

A
B

E

D

F

G

C

Internal Dimensions: 20.75" Wide, 31.75" Deep, 22" High

Model Cabinet Width (A) Overall Width (B) Leg Height (C) Overall Hei ght (D) Overall Depth (E)

CG90-1 38" 39.6" 25.9" 59.1" 40.3"

Water Connection

Model

CG90-1 12.6" 33.9" 17.5" 29.5" 20.2" 28.9"

3/8" NPT (Female)

From Right (F) Above Floor (I) From Right (G) Above Floor (J) From Right (H) Above Floor (K)

Gas Supply Connection

3/4" NPT (Male)

H

JKI

Drain Tube

2" OD

GAS

Burners total 90,000 BTU. Supply pressure s hould be > 7 " W.C. for natural gas or > 11" W .C. for propane.
One 3/4" NPT male connector located on back, 17.5" from right side, 29.5" above floor (see above figure).

WATER

Cold water consumption is regu lated to approximately 0.5 gallons per minute. Water pressur e 30 psi (205
kPa) minimum, 60 psi. (410 kPa) maximum. To minimize service problems and to meet warranty
requirements, a water treatment system (softener) is recommended if water quality does not meet the
following specif ications: total dissolv ed solids (TDS) 60 ppm , hardness 2 grains or 3 5 ppm, pH f actor7.0 to

7.5. Install a water treatment system ( softener) if necess ary. Connector is a 3/8 " female NPT "tee" loc ated
on the back of the oven, 12.6" from right side, 33.9" above floor (see above figure).

DRAIN

Drain line is a 2" OD t ube extendi ng from the back of the ove n, 20.2" f rom right side, 28.9" abo ve floor (see
above figure). Drain outlet must be unobstructed and free-venting to atmospheric pressure! See page 11.

PAGE 4OPERATOR’S MANUAL 1180963

COMBINATION OVEN SPECIFICATIONS

ELECTRIC

Maximum 8.0 amps (use 15 amp circuit breaker). Three voltage options:

120 VAC, 60 Hz, 1 phase: Six-foot cord with three-prong plug (standard option).
208 VAC, 60 Hz, 1 or 3 phase: Wire junction box to terminal block located near rear of motor compartment.
240 VAC, 60 Hz, 1 or 3 phase: Wire junction box to terminal block located near rear of motor compartment.

All units are shipped single-phase. Single-phase units can be easily operated on three-phase systems.

CLEARANCES

See page 8.

CONSTRUCTION (BIDDING) SPECIFICATIONS

Commercial Gas Combination Steamer/Convection Oven, Single Deck:

39.6" Wide, 59.1" High (including 25.9" legs), 40.3" Deep.
Exterior Finish: Oven front, sides, and top #3 finish stainless steel. Back aluminized steel.
Door: Single door, insulated #304 stainless steel construction (interior and exterior), positive door catch,

single action release.
Oven Interior: #304 stainless steel, including heat exchangers and baffle.
Rack & Rack Guides : Stainless s teel heav y-duty removabl e wire rack guides spaced on 1-5/8" c enters of fer

11 rack positions. Stainless steel heavy-duty removable safety-stop racks are provided with each cavity.

SPECIFICATIONS

Blower Fan & Motor : 1/2 horsepo wer, 2-spee d motor, 1725/11 40 rpm. Motor mounte d in na turally v entilated

compartment, away from heat zone. Motor serviceable from right side.
Control Panel: Located on front, at right side of oven, away from heat zone. Panel slides out for easy

servicing.
Solid State Controls allow oper ator to selec t Convection O ven, Convect ion Steam er or Com bination modes,

in addition to controlling fan speed, steam injection, and cool-down modes. Time/temperature dial

controls with digital disp lays.

DESIGN FEATURE SPECIFICATIONS

• Condensate spray with free venting exhaust

• Automatic cool down mode

• Interior washdown hose

• Rear condensate drain

NOTICE

INTENDED FOR COMMERCIAL USE ONLY. NOT FOR HOUSEHOLD USE.

OPERATOR’S MANUAL 1180963 PAGE 5

INSTALLATION COMBINATION OVEN

INSTALLATION

Do not locate unit adjacent t o any high heat or greas e pr od uc in g p iece of eq ui pment, such as a range
top, griddle, fryer, etc., that could allow radiant heat to raise the exterior temperature of the

INSTALLATION

combination oven above 130°F (54°C). DO NOT MOUNT ABOVE OTHER COOKING EQUIPMENT.

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.

! CAUTION

NOTICE

The unit, when installed, must be electrically grounded and comply with local codes, or in the
absence of local codes with the Nation al Electrical Code, ANSI/NFPA 70, or the Canadian Electr ic
Code, CSA C22.2, as applicable.

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.

Step 1: Unpack

IMMEDIATELY INSPECT FOR SHIPPING DAMAGE

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 sign ed, the carrier may ref use
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.

PAGE 6OPERATOR’S MANUAL 1180963

COMBINATION OVEN INSTALLATION

Step 2: Install the Legs

A set of legs is pac k ed in the unit. The le gs c an be a dj us ted t o o ver come a slightly une ve n f loor. When legs
with casters have been ordered, the casters are provided with a Zerk fitting for proper lubrication when
required.

1. Raise oven sufficiently to allow legs to be bolted to the bottom corners. For safety, “shore up” and

INSTALLATION

OPERATOR’S ANUAL 1180963 PAGE 7

INSTALLATION COMBINATION OVEN

Step 3: Check Clearances and Ventilation

There must be adequate clearance between oven(s) and construction. Clearance must also be
provided for servicing and for operation.

Minimum Clearances:

From Combustible Construction From Non-Combustible Construction

Back 7" 0”

INSTALLATION

Adequate clearance must be prov ided in the ais le and at the side and rear to allo w the do or to open
sufficiently to permit the removal of the racks and for serviceability.

No additional clearance is required for service as the ovens are servicable from the front.

Right Side 0" 0"
Left Side 0" 0"
Floor 0" 0"

! WARNING

! 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. Provisions f or adequate air sup ply must be provided. Do not obstruct the f ront 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.

NOTICE

Proper ventilatio n is the owner's responsibilit y. Any problem due t o improper ventilation will not be
covered by the warranty.

Canopies are set over ranges, ovens, etc., for ventilation purpos es. It is r ecomm ended that a ca nopy extend
6” past the applianc e and the bottom edge be locat ed 6’6” from the f loor. Filters should be installed at an
angle of 45° or m ore from the horizontal . This positio n prevents drippi ng gr ease and faci litates collect ing the
run-off grease in a drip pan, unusually installed with a filt er . A st rong ex haus t f an ten ds to c reat e a vac u um 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.

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

“OFF” position. Do th is on l y lo ng eno ugh to c heck equipment perf ormance. Then turn hoo d b ac k on and let it
run to remove any exhaust that may have accumulated during the test.

PAGE 8OPERATOR’S MANUAL 1180963

COMBINATION OVEN INSTALLATION

Utility Connections

INSTALLATION

OPERATOR’S ANUAL 1180963 PAGE 9

INSTALLATION COMBINATION OVEN

Step 4: Electrical Connections

A wiring diagram is located inside the control compartment on the right side of the pull-out control-panel
assembly. To access the control-pan el compartment, rem ove the screw at the top of the control pa nel and
pull the control panel out.

Units ordered with a 115VAC, 60Hz, sin gle-phase elec trical ratin g are fac tory-supplie d with t hree-wire cord
and three-prong plug, which fits any standard three-prong grounded receptacle.

Units ordered with a 208/240VAC, 60Hz, singl e- o r three-phase electric al r a ting are factory-equip pe d with a
2-pole terminal block located behind a cover plate located at the rear of the unit. To connect the supply
wires, remove the a ppropriate cover pl ate. Route t he suppl y wires a nd t he groun ding wire thro ugh th e str ain
relief fitting to the ter minal block . Insert the supply wires , one each, into the t wo poles of the terminal block

INSTALLATION

and tighten the screws. Insert the ground wire into the grounding lug and tighten the screw. Re-attach t he
cover plate.

Three phase units are wired as above, using on ly two supply wires. T he third wire is not used and must be
properly terminated.

All units are shipped wired as sp ecified b y factory order. Conversion between single- phase and three-phase
can be accomplis hed by referring to phase lo ading and line amperes chart on wiring diagram for wire size
and ampere requirements.

! WARNING

A POSITIVE GROUND CONNECTION IS ESSENTIAL. DO NOT ALLOW ANY TAMPERING OR
ADJUSTMENT OF ANY CONTROL OR WIRING. T HE UNIT IS FACTORY SET. ADJUSTING ANY
INTERNAL COMPONENT OTHER THAN THE MAIN FUSE BLOCK CAN VOID THE WARRANTY.

! WARNING

ELECTRICAL GROUNDING INSTRUCTIONS

This appliance is equipped with a three-prong (grounding) plus for your protection against shock
hazard and should b e plugg ed dir ectl y into a pr operl y ground ed thr ee-pro ng rece ptacl e. Do n ot cut or
remove the grounding prong from the plug.

Step 5: Connect Water Supply

Connect a cold water line to the 3/8" fem ale NPT "tee" connector located on the back of the oven (at the
lower left-hand side when facing the back of the oven, see figure on page 9).

To facilitate cleaning, plus allow access to the rear of the unit, flexible connections are recommended.

NOTICE: WATER SPECIFICATION

To meet warranty requirements, supply water must meet the following specification:

Pressure ...........................................30 to 60 psi (205 to 410 kPa)

Total Dissolved Solids (TDS) ...........60 PPM

Hardness ..........................................2 Grains or 35 PPM

pH Factor..........................................7.0 to 7.5

PAGE 10 OPERATOR’S MANUAL 1180963

COMBINATION OVEN INSTALLATION

Step 6: Water Drain

The drain line from the oven is a 2" O.D. tube (see figure on page 9) . Positi on the ove n near, but n ot on top
of, an open floor drain. DO NOT directly plumb to the oven unless you also install an “open funnel”
downstream of this connectio n in the drain s ystem. Make the drain li ne f rom the unit to the air g ap a bo ve t he
"open funnel" as shor t as possible. T here should be no h orizontal piping bet ween the oven and the air gap
over the "open funnel." T he "o pen funnel" is in ten ded to el iminate any water from entering the oven bec aus e
of a blocked drain, and it also prevents an y back pressure within the oven cavity. The o ven must be f ree­venting to the atmosphere. A ny connection th at allows the b uild-up of back pressure in the o ven (such as a
reduction in pipe s i ze t o a lin e s maller than 2" or a 9 0 de gree angle in the line pr ior to t he "open funn el " dr ain
discharge point) may cause personal or property damage and therefore will void the warranty. This is a
pressureless, free- venting ove n and will not o perate proper ly unless the drain line is short, at a steep angle ,
and open!

Water Drain Open Funnel

INSTALLATION

OPERATOR’S ANUAL 1180963 PAGE 11

INSTALLATION COMBINATION OVEN

Step 7: Gas Connection

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 behind the lo wer f ront pane l on th e lef t side. It ind icates th e t ype of gas the u nit is
equipped to burn. All Southbend equipment is adjusted at the factory. Check type of gas on serial plate.

This appliance should be connected ONLY to the type of gas for which it is equipped.
A 3/4" male NPT line is provided at the rear for the connection. Each oven is equipped with an internal

pressure regulator whic h is s et f o r 4 " W.C. manifold pres s ure f or natur a l g as or 1 0.0 " W.C. manifold pres s ure

INSTALLATION

for propane gas. Use the 1/8" tap on the top of the gas valve for checking pressure.
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.

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 problem s and affect burner operating char acteristics. A 1/8” pressure tap is located on the gas
valve to measure the manifold pressure.

An adequate gas s upp ly li ne t o th e u nit s hou ld be n o s maller than the I.D. of the pipe from the unit to which it
is connected.

Purge the supply line to clean out dust, dirt, or other foreign matter bef ore connecting the line to the unit.
Each oven has a manual shut off valve located behind the lower front panel.

Use pipe joint compound which 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.

PAGE 12 OPERATOR’S MANUAL 1180963

COMBINATION OVEN INSTALLATION

Step 8: Installation and Performa nce C heck

The following items should be checked by a qualified service technician:

1. Verify that oven is level.

2. Verify proper electrical characteristics (voltage, cycle, phase).

3. Check ventilation.

4. Check electrical connections (external and internal).

5. Check door(s) for proper alignment, tension, seal, and adjustment.

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

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

8. Check for proper clearance from combustible materials.

9. Verify proper type of gas.

10. Verify gas supply pressure (pressure regulator is already installed at factory).

11. Check gas connection and check for gas leaks.

12. Check water connection and check for water leaks.
It is common for new products to require a burn-off time to dry out insulation and metal cooking surfaces.

INSTALLATION

OPERATOR’S ANUAL 1180963 PAGE 13

OPERATION COMBINATION OVEN

OPERATION

NOTICE

No attempt should be made to operate oven during a power failure.
A manual gas shutoff valve is located behind front lower panel for turning gas on and off.

OPERATION (FOR STANDARD CONTROL OPTION)

Lighting the Combi – The Combi has an inter m ittent st anding pilot . When the un it is turn ed o n, the light ing
sequence is control led by an ignition module. A hot surface ignitor ignites th e pilot, which stays lit for the
entire time the Combi is turned on and the flame is proven by the flame sensor.

Re-Lighting the Combi – If the Combi does not light on the first attempt, do the following:

1. Shut off all gas.

OPERATION

2. Wait five minutes.

3. Repeat lighting instructions above.

Turning the Combi On and Off – The power switch at t he top left c orner of th e control pane l turns the unit
on and off. When the power switch is tur ned on, the Com bi begins a diagnostic check and in itiates the pilot
lighting sequence. If the diag nostic c heck or the lighti ng se quence fails, a cod e wor d will appear in the t ime
display and operation wi ll be sus pend ed. Ot herwis e the un it wil l beg in opera tio n in th e startu p def ault m ode,
which is oven mode at 350ºF.

Choosing Fan Speed – The Combi has a two speed fan whic h c an b e controlled with the f an speed selector
switch at the upper right hand corner of the control panel.

Choosing the Cooking Mode

Oven Mode is selected by pressing the OVEN button, which causes t he light above the OVEN button to

illuminate. In oven mode, the Combi acts exactly like a convection oven. If when the OVEN mode
button was pressed the unit is not at the setpoint tem perature, the tem perature dis pla y will flash unt il the
setpoint temperature is reached.

Steam Mode is selected by pressing th e STEAM b utton, which ca uses the light above the ST EAM button to

illuminate. In steam mode, the Com bi ac ts ex ac tl y lik e a pr es sur eles s c ou nter to p c on vect ion s t eamer. If
when the STEAM mode button was pressed the uni t is not at the setp oint temperatur e, the temperatur e
display will flash until the s etpoint temperature is reached. In steam m ode, the setpoint temperatur e is
preset to 215ºF, to allow pure, slightly superheated steam to circulate within the cavity.

Combi Mode is selected by pressing th e COMBI button, which c auses the light abov e the COMBI button to

illuminate. In com bi mode, a high m oisture cooking envir onment is create d through caref ully controlled
humidification. If when th e COMBI m ode butto n was press ed the un it is not at t he setpo int temper ature,
the temperature display will flash until the setpoint temperature is reached.

Steam Inject Mode is the only mode that c an used in conjunc tion with another c ooking mode, nam ely oven

mode. Pressing the STEAM INJECT button ca uses s team to be delivered to t he c avi t y for as l ong as th e
button is held. The intent is to provide the des ired surface c haracteristics (crispy, shiny crus t) on bread
products, and for any other products that would benefit from timely steam injections.

Vent/Cool Mode is designed to quickly cool t he cavi ty from a high setpo int tem perature to a low tem perature

using a combination of high fan speed and a cooling spray of water

PAGE 14 OPERATOR’S MANUAL 1180963