Hobart CE20FD Operator’s Manual
GAS & ELECTRIC COMBI,
CONVECTION & STEAM OVENS
DIRECT STEAM INDIRECT STEAM
(BOILERLESS) (WITH STEAM GENERATOR)
(LEFT HINGED DOOR)
CE6HD ML-138010
CE10HD ML-138012 CG10FI ML-138048-Z
CE10FD ML-138016
CE20HD ML-138014
CE20FD ML-138018
(RIGHT HINGED DOOR)
CE6HD ML-138011
CE10HD ML-138013
CE10FD ML-138017
CE20HD ML-138015
CE20FD ML-138019
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
www.hobartcorp.com
FORM 35474 Rev. A (March 2010)
IMPORTANT FOR YOUR SAFETY
THIS MANUAL HAS BEEN PREPARED FOR PERSONNEL QUALIFIED TO INSTALL GAS
EQUIPMENT, WHO SHOULD PERFORM THE INITIAL FIELD START-UP AND ADJUSTMENTS
OF THE EQUIPMENT COVERED BY THIS MANUAL.
POST IN A PROMINENT LOCATION THE INSTRUCTIONS TO BE FOLLOWED IN THE EVENT
THE SMELL OF GAS IS DETECTED. THIS INFORMATION CAN BE OBTAINED FROM THE
LOCAL GAS SUPPLIER.
IMPORTANT
IN THE EVENT A GAS ODOR IS DETECTED, SHUT DOWN UNITS
AT MAIN SHUTOFF VALVE AND CONTACT THE LOCAL GAS
COMPANY OR GAS SUPPLIER FOR SERVICE.
FOR YOUR SAFETY
DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE
VAPORS OR LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER
APPLIANCE.
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.
IN THE EVENT OF A POWER FAILURE, DO NOT ATTEMPT TO
OPERATE THIS DEVICE.
KEEP AREA AROUND OVEN CLEAR OF COMBUSTIBLES. DO
NOT OBSTRUCT COMBUSTION AND VENTILATION OPENINGS
ON THE OVEN.
©HOBART, 2010
– 2 –
TABLE OF CONTENTS
GENERAL ..............................................................................................................................................................5
INSTALLATION ......................................................................................................................................................5
Unpacking ........................................................................................................................................................5
Installation Codes and Standards ....................................................................................................................5
Location ...........................................................................................................................................................6
Door Opening ...................................................................................................................................................6
Stacking Kits ....................................................................................................................................................6
Leveling ............................................................................................................................................................6
Water Requirements ........................................................................................................................................6
Water Quality Statement ..................................................................................................................................6
Plumbing Connections .....................................................................................................................................6
Water Supply Connections ...............................................................................................................................7
Drain Connection .............................................................................................................................................7
Gas Supply Connections .................................................................................................................................7
Testing the Gas Supply System .......................................................................................................................8
Flue Gas Exhaust ............................................................................................................................................8
Electrical Connection .......................................................................................................................................9
Vent Hood ........................................................................................................................................................9
Before First Use ...............................................................................................................................................9
OPERATION .........................................................................................................................................................10
Door Switch ....................................................................................................................................................10
Door Opening and Closing .............................................................................................................................10
Loading the Oven ...........................................................................................................................................10
Unloading the Oven .......................................................................................................................................11
Cooking Modes .............................................................................................................................................. 11
Control Panel .................................................................................................................................................11
Initial Start-Up ................................................................................................................................................14
Setting the Internal Clock ...............................................................................................................................14
Setting the Temperature .................................................................................................................................14
Setting the Timer ............................................................................................................................................15
Setting the Humidity .......................................................................................................................................15
Setting the Vent Position ................................................................................................................................15
Setting the Fan Speed ...................................................................................................................................16
Fast Cool Down .............................................................................................................................................16
Selecting the Cooking Mode ..........................................................................................................................17
Preheating the Oven ......................................................................................................................................17
Using Convection Mode .................................................................................................................................17
Using Steam Mode ........................................................................................................................................18
Using Combi Mode ........................................................................................................................................18
Temperature Probe ........................................................................................................................................19
Using the Product Temperature Probe ...........................................................................................................20
Using the 10 Position Timer ...........................................................................................................................21
Writing a Cooking Phase................................................................................................................................22
– 3 –
TABLE OF CONTENTS (CONT.)
Erasing a Cooking Phase ..............................................................................................................................22
Writing a Cooking Program ............................................................................................................................23
Modifying a Cooking Program ........................................................................................................................24
Reviewing a Cooking Program ......................................................................................................................24
Erasing a Cooking Program ...........................................................................................................................24
Using a Cooking Program ..............................................................................................................................25
Setting a Preheat Delayed Start ....................................................................................................................25
Add a Barcode to a Program (If Optional Barcode Scanner Was Ordered) ...................................................26
Remove a Barcode From a Program .............................................................................................................26
Using the Scanner .........................................................................................................................................27
Combi Oven Bluetooth Capabilities ...............................................................................................................27
MAINTENANCE ...................................................................................................................................................29
Service Adjustments ......................................................................................................................................29
Door Locking and Gasket Inspection .............................................................................................................29
Service and Parts Information ........................................................................................................................29
Shutting Down the Oven ................................................................................................................................29
STAINLESS STEEL EQUIPMENT CARE AND CLEANING .................................................................................30
CLEANING ...........................................................................................................................................................31
TROUBLESHOOTING .........................................................................................................................................34
Autodiagnostics ..............................................................................................................................................34
Service Parameter Setup ...............................................................................................................................35
– 4 –
INSTALLATION, OPERATION AND CARE OF
GAS & ELECTRIC COMBI,
CONVECTION & STEAM OVENS
SAVE THESE INSTRUCTIONS
GENERAL
The Gas & Electric Combi, Convection & Steam Ovens are single compartment ovens that provide
convection heating and/or steaming in the cooking chamber.
The Hobart Combi Gas or Electric ovens are sized 6, 10, or 20 levels high. The 6 level ovens are Half depth
only. The 10 and 20 level ovens are either Full or Half depth. All models include a Digital programmable
control. The bold numbers and letters explain the model-number conventions.
The 6 or 10 level ovens can be installed on a suitable countertop using the 2" legs (standard) or the optional
6" legs. The 6 or 10 level ovens can also be installed on an accessory stand. The accessory stand may
be equipped with an accessory Pan Slide which provides rack or pan storage underneath the oven. On 6
or 10 level ovens, the accessory Landing Table can load or unload all racks in one motion when the oven
is mounted on the accessory stand. Additional racks are also available accessories. The 20 level ovens
are installed with legs and come with a Trolley to allow loading or unloading all racks in one motion. An
optional Hose Spray accessory supplied by others can be installed near the oven to facilitate easy cleaning
of the accessory racks.
INSTALLATION
UNPACKING
Immediately after unpacking the oven, check for possible shipping damage. If the oven is found to be
damaged, save the packaging material and contact the carrier within 15 days of delivery.
Prior to installation, verify that the electrical and water service agrees with the specifi cations on the oven
data plate and in this manual.
INSTALLATION CODES AND STANDARDS
In the United States, the Hobart Combi Oven must be installed in accordance with:
1. State and local codes.
2. National Fuel Gas Code, ANSI-Z223.1 (latest edition). Copies may be obtained from The American
Gas Association, Inc.; 1515 Wilson Blvd.; Arlington, VA 22209.
3. National Electrical Code (ANSI/NFPA No.70, latest edition) available from the National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269.
4. Vapor Removal from Cooking Equipment, (NFPA-96, latest edition) available from NFPA.
In Canada, the Hobart Combi Oven must be installed in accordance with:
1. Local codes.
2. CAN/CGA-B149.1 Natural Gas Installation Code (latest edition).
3. CAN/CGA-B149.1 National Fuel Gas Code (latest edition), available from The Canadian Gas
Association; 178 Rexdale Blvd.; Etobicoke, Ontario; Canada M9W 1R3.
4. Canadian Electrical Code (CSA C22.2 No.3, latest edition) available from the Canadian Standards
Association, 5060 Spectrum Way, Mississauga, Ontario, Canada L4W 5N6.
– 5 –
LOCATION
Allow space for operating the oven. Do not obstruct the ventilation ports above the oven. To provide
ventilation access, allow 1" clearance on the left side of the oven and 2
1
/2" clearance at the rear. A suitable
amount of space (18" minimum) should be provided on the right side of the machine for operation, cleaning
and service. Ensure a level fl oor is available for operation of the 20 level units with trolley system.
DOOR OPENING
The standard oven is delivered with the door hinged on the left. If the door opening needs to be changed,
contact your authorized Hobart Service offi ce.
STACKING KITS
Stacking kits are available to allow ovens to stack, one on top of the other (available for 6 and 10 level
ovens only). Assembly Instructions are included with the kit.
LEVELING
Use a spirit level on a rack in the oven to make sure the oven is level, both front-to-back and side-to-side.
On 20 levels, accessory stands, and optional 6" legs, adjust the leveling feet on the bottom of the legs by
turning the feet in or out to level the oven. After the drain is connected, check for level by pouring water
onto the fl oor of the compartment. All water should drain through the drain opening.
WATER REQUIREMENTS
As with all steam related products, water fi ltration and regular fi lter replacements coupled with
routine deliming are required. Your local Hobart Service offi ce can recommend a water treatment system
to meet the needs of your local water conditions. Contact your local Hobart Service representative for
water treatment offerings.
WATER QUALITY STATEMENT
The fact that a water supply is potable is no guarantee that it is suitable for steam generation. Proper water
quality can improve the taste of the food prepared in the oven, reduce liming and extend equipment life.
Local water conditions vary from one location to another. The recommended proper water treatment for
effective and effi cient use of this equipment will also vary depending on the local water conditions. Your
water supply must be within the general guidelines outlined in the chart below.
Other factors affecting steam generation are iron content, amount of chlorination, chlorine, and dissolved
gasses. Water supplies vary from state to state and from locations within a state. Therefore it is necessary
that the local water treatment specialist be consulted before the installation of any steam generating
equipment. Ask your municipal water supplier for details about your local water supply prior to installation
or contact your local Hobart representative.
Water hardness should be treated by a water
conditioner (water softener and/or in-line water
treatment). Low water hardness may also require a
water treatment system to reduce potential corrosion.
Water treatment has been shown to reduce costs
associated with machine cleaning, reduce deliming
and reduce corrosion of metallic surfaces.
WATER SUPPLY GENERAL GUIDELINES
Supply Pressure 30-60 psig
Hardness less than 3 grains*
Silica less than 13 ppm
Total Chloride less than 4.0 ppm
PH range 7-8
Un-Dissolved Solids less than 5 microns
* 17.1 ppm = 1 grain of hardness
PLUMBING CONNECTIONS
Plumbing connections must comply with applicable sanitary, safety and plumbing
codes.
– 6 –
WATER SUPPLY CONNECTIONS
Connect treated potable water (cold) to the inlet. Untreated water contains scale producing minerals which,
if supplied, can precipitate and adhere to the surfaces inside the oven. This can result in early component
failure and reduced product life.
DRAIN CONNECTION
In order to avoid any back pressure in the oven, do not connect solidly to any drain.
The 1" NPT threaded fi tting on the condenser box must be extended a minimum of 12" (305 mm) - maximum
of 72" (1829 mm) away from combi base, to an open air gap type drain. Do not reduce the 1" NPT drain
piping throughout its length. Provide a suitable fl oor sink with a minimum depth of 12" (305 mm). The fl oor
sink is NOT to be directly under the combi and should be at a distance so that steam vapors will not enter
the combi from underneath. The drain should slope down away from the combi ¼" for every foot of drain
pipe length. The drain pipe should be either iron or copper. DO NOT use PVC pipe; PVC pipe may lose
its rigidity or glue may fail.
RIGHT
WRONG
Temperatures in the combi can reach as high as 212°F (l00°C). Local codes
may require that the temperature of drain water be no greater than 140°F
(60°C). At the end of the day, when purging the generator, some provision for
HOSE
HOSE
lowering the water temperature should be provided by the user or installer
to meet this code requirement.
The drain hose for the drip tray should be installed and routed with a constant
decline (Fig. 1).
DRIP TRAY
DRIP TRAY
Fig. 1
GAS SUPPLY CONNECTIONS
Gas supply connections and any pipe joint compound must be resistant to the action of propane
gases.
A ¾" NPT minimum inside diameter gas supply line is required. If quick disconnect devices are used, make
sure it is sized properly for data plate BTU/hr. rating.
Codes require that a manual gas shutoff valve be installed in the gas
line ahead of the combi oven. The gas line must be capable of delivering
gas to the combi oven without excessive pressure drop at the minimum
rate specifi ed on the rating plate.
Gas Input
Natural 5.5" - 10.5" W.C.
Propane 11" - 13" W.C.
MINIMUM RATE
3
/4" NPT
Inadequate gas supply could result in burner noise and poor burner performance.
The proper sizing and installation of the gas connection is important for the machine to operate within
its design specifi cations. In some installations, the gas supply may not be suffi cient enough to allow all
the gas equipment to operate properly at peak loads; or when other equipment with a high BTU/hr. input
requirement is operating. The connection to the machine becomes even more important in this type of
location. Flexible gas connectors with quick disconnect or swivel fi ttings (when used) and gas connectors
beyond the length necessary will reduce the BTU/hr. fl ow capacity to the machine.
– 7 –
GAS SUPPLY CONNECTIONS (CONT.)
NOTE: Do not use corrugated stainless steel tubing for commercial gas equipment supply connections.
NOTE: A straight gas connection is the ideal condition for the rated BTU/hr. fl ow capacity of the connector.
If a straight connection is not possible and a fl exible gas connector is used, do not twist, kink or excessively
fl ex the connector beyond a U-shape. Flexing the gas connector as described will restrict gas fl ow or may
damage the connector.
COMBI WALL COMBI WALL
INCORRECT INSTALLATION CORRECT INSTALLATION
Changing a fl exible gas connector may raise the BTU/hr. fl ow capacity enough to allow the machine to
operate within its design specifi cations. (i.e. Removing the quick disconnect fi tting, installing a shorter gas
connector or installing a larger diameter gas connector.)
An alternative may be to move the equipment to a different gas supply location in the kitchen. (i.e. Closer
to the main supply into the kitchen or away from other equipment with high BTU/hr. input requirements.)
The combi oven is equipped with a factory preset pressure regulator. Natural gas pressure regulators are
preset for 5.0" W.C. (1.2 kPa). Propane gas pressure regulators are preset for 10.0" W.C. (2.46 kPa). No
further adjustment should be required. Check gas pressures with a manometer at time of installation to
verify that they agree with the pressures specifi ed.
Prior to lighting, check all joints in the gas supply line for leaks. Use soap and water
solution. Do not use an open fl ame. After piping has been checked for leaks, all piping receiving
gas should be fully purged to remove air.
TESTING THE GAS SUPPLY SYSTEM
1
When gas supply pressure exceeds
/2 psig (3.45 kPa), the oven and its individual shutoff valve must be
disconnected from the gas supply piping system.
When gas supply pressure is
1
/2 psig (3.45 kPa) or less, the oven should be isolated from the gas supply
system by closing its individual manual shutoff valve.
Model Volts Hertz Phase Amps (Max Used) BTU/Hr *Fuse (Amps)
CG10FI 120 60 1 5.0 60,000 1
* Fuse rating is based on electrical standard 125% increase over actual amps used.
FLUE GAS EXHAUST
DO NOT obstruct the fl ow of fl ue gases from the fl ue located on the top of the combi oven. It is recommended
that the fl ue gases be vented to the outside of the building through a ventilation system installed by
qualifi ed personnel. Information on the construction and installation of ventilating hoods may be obtained
from Vapor Removal from Cooking Equipment, NFPA-96 (latest edition) available from the National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
– 8 –
ELECTRICAL CONNECTION
Appliances equipped with a fl exible electric supply cord are provided with a three-
prong grounding plug. It is imperative that this plug be connected into a properly grounded threeprong receptacle. If the receptacle is not the proper grounding type, contact an electrician. Do not
remove the grounding prong from this plug.
Electrical and grounding connections must comply with the applicable portions of
the National Electrical Code and/or other local electrical codes.
Disconnect electrical power supply and follow lockout / tagout procedures.
The wiring diagram is located on the inside surface of the right side panel as you face the oven. Use
copper wire rated for at least 194°F (90°C) for the connection.
Do not drill a hole in the back panel for electrical connection. Use the strain relief locations on
the lower right side or the knockout on the back panel (Fig. 2). This will allow proper access to components
for service.
STRAIN RELIEF
RIGHT SIDE
KNOCKOUT
REAR
Fig. 2
Do not connect the gas model to the electrical supply until after gas connections
have been made.
Model Volts Hertz Phase Amps (Max Used) Watts *Fuse (Amps)
CE6HD
CE10HD
CE10FD
CE20HD
CE20FD
208
230-240
480
208
230-240
480
208
230-240
480
208
230-240
480
208
230-240
480
60 3
60 3
60 3
60 3
60 3
22.2
20.1-21.9
9.6
44.4
40.2-43.7
19
59.4
53.6-58.4
26
88.8
80.3-87.5
39
103.8
93.8-102.1
45
8000
8000-8700
8000
16000
16000-17400
16000
21400
21400-23300
21400
32000
32000-34800
32000
37400
37400-40700
37400
* Fuse rating is based on electrical standard 125% increase over actual amps used.
30
30
15
60
60
25
80
80
35
125
110
50
150
150
60
NOTE: Single-phase blower motors are used on these ovens so there is no need to check direction of
motor rotation. The fan will rotate in the proper direction.
VENT HOOD
Some local codes may require the Combi oven to be located under an exhaust hood. Information on the
construction and installation of ventilating hoods may be obtained from Vapor Removal from Cooking
Equipment, NFPA Standard No. 96 (latest edition).
BEFORE FIRST USE
Before using the oven for the fi rst time, it must be "burned in" to release any odors that might result from
heating the new surfaces in the oven. Operate the oven at 482°F for 45 minutes in Convection Mode.
– 9 –
OPERATION
The oven and its parts are hot. Use care when operating, cleaning or servicing the
oven. The cooking compartment contains live steam. Stay clear when opening door.
DOOR SWITCH
The oven is equipped with a feature that shuts off power to the oven cavity when the door is opened. The
oven will resume cooking once the door is closed.
DOOR OPENING AND CLOSING
To open the door (Fig. 3), turn the handle to the
horizontal position. Allow a few seconds for steam
to escape before pulling the door open.
To close the door (Fig. 3), position handle in the
horizontal position and push the door closed. Rotate
handle to the vertical position to secure door.
LOADING THE OVEN
Loading 6 or 10 Level Ovens
Place the product to be cooked in suitable containers.
Open the door and slide into the rack guides or
place the containers securely on racks in the oven.
Close the door.
OPEN POSITION
CLOSED POSITION
Fig. 3
Loading 6 or 10 Level Ovens With Landing Table
And Removable Insert
Place removable insert on the landing table. Place
the product to be cooked in suitable containers and
slide into the rack guides or place the containers
securely on racks on the removable insert (Fig. 4).
Place the handle into the removable insert. Open
the door. Position the landing table directly in front
of the open oven cavity. While holding the landing
table in position with one hand, with the other hand,
release the insert and gently roll the removable insert
into the oven cavity. Make sure that the landing
table does not separate from the oven during the
transfer. Remove the handle from the insert and
close the door.
Loading 20 Level Ovens
Place the product to be cooked in suitable containers
and slide into the rack guides or place the containers
securely on racks on the trolley (Fig. 5). Place the
handle into the trolley. Open the door. Line up the
trolley with the trolley slots on the oven and push
the trolley into the oven cavity. Remove the handle
from the trolley and close the door.
HANDLE
REMOVABLE
INSERT
LANDING
TABLE
Fig. 4
– 10 –
UNLOADING THE OVEN
Unloading 6 or 10 Level Ovens
Open door partially to allow hot air and steam to
escape. Remove the product from the rack guides
or racks in the oven. Close the door.
Unloading 6 or 10 Level Ovens With Landing
Table And Removable Insert
Open door partially to allow hot air and steam to
escape. Position the landing table (Fig. 4) directly
in front of the oven cavity. Insert the handle into the
removable insert. Using protective gear, carefully roll
the removable insert onto the landing table. Make
sure that the landing table does not separate from
the oven during transfer. Close the door.
Unloading 20 Level Ovens
Open door partially to allow hot air and steam to
escape. Insert the handle into the trolley. Using
protective gear, pull the trolley (Fig. 5) out of the
oven. Close the door.
HANDLE
TROLLEY
COOKING MODES
There are three modes of cooking available with
the Combi Oven.
Convection Mode
Convection Baking involves baking, browning,
roasting, etc. without adding steam or moisture to
the process. Hot air is circulated to maintain even
temperatures throughout the oven.
Steam Mode
Steam cooking is used for stewing, poaching,
and gentle cooking of products cooking in water.
Steam fl ows without pressure into the oven. The fan
circulates the steam to all parts of the oven.
Combi Mode
Combi baking/steaming is used for baking, roasting,
or braising when steam needs to be added to the
oven during a convection baking operation.
CONTROL PANEL
The control panel (Fig. 6) has a screen that displays
to the user the functions in progress. All features
are displayed on the screen and adjusted by using
the buttons on the control panel.
Fig. 5
– 11 –
Fig. 6
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