Vulcan GCO4C Installation Manual
INSTALLATION &
OPERATION MANUAL
GCO SERIES GAS CONVECTION OVENS
MODEL
GCO4S ML-52425
GCO4D ML-52354
GCO4C ML-52357
GCO6D ML-114729
GCO6C ML-114730
GCO4C
VULCAN-HART COMPANY, P.O. BOX 696, LOUISVILLE, KY 40201-0696, TEL. (502) 778-2791
FORM 30903 Rev. B (2-98)
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.
WARNING
IMPROPER INSTALLATION, ADJUSTMENT,
ALTERATION OR MODIFICATION, 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.
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TABLE OF CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation Codes and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing Basic Oven. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Assembling the Legs to the Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Assembling the Chimney and Flue Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Assembling Stacked Ovens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Assembling the Oven to the Stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Gas Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Testing the Gas Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Burner Air Shutter Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Flue Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Controls — Models GCO4S and GCO4D/GCO6D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Lighting the GCO4S and GCO4D/GCO6D Ovens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Before First Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Using the GCO4S and GCO4D/GCO6D Ovens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Controls — Model GCO4C/GCO6C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Lighting the GCO4C/GCO6C Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Before First Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Using the GCO4C/GCO6C Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Error Messages — GCO4C/GCO6C Oven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Roast and Hold Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Proper Utensils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Conserving Energy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operating Hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Cooking Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Replacing Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Service and Parts Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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Installation, Operation And Care Of
GCO SERIES GAS CONVECTION OVENS
KEEP THESE INSTRUCTIONS FOR FUTURE USE
Your Vulcan Gas Convection Oven is produced with quality workmanship and material. Proper installation,
usage and maintenance of your oven will result in many years of satisfactory performance.
The manufacturer suggests that you thoroughly read this entire manual and carefully follow all of the instructions
provided.
GENERAL
The Model GCO Series Convection Ovens feature a 500°F thermostat, timer, porcelain interior, and a two-speed
1
⁄2 H.P. blower motor as standard equipment. Each oven is equipped with a 40,000 BTU/hr. burner and requires
a 120 volt single phase electrical service. The oven doors open independently.
Model GCO4 is a single cavity oven. It is furnished with five racks. An open stand with lower storage rack is
available as an option.
Model GCO44 consists of two single ovens and is furnished with a stacking kit for mounting one oven on top of
the other.
Models GCO6D and GCO6C have a deeper oven cavity.
Features of the models are shown below:
ROAST
THERMOSTAT TIMER STACKING & GENTLE
MODEL (Each Oven) (Each Oven) LEGS* KIT HOLD BAKE
1
GCO4S Mechanical 1-Hour Dial (4) 25
GCO44S Mechanical 1-Hour Dial (4) 8" (20cm) X
GCO4D/GCO6D Solid State 1-Hour Dial (4) 25
GCO44D/GCO66D Solid State 1-Hour Dial (4) 8" (20cm) X
GCO4C/GCO6C Electronic Electronic (4) 251/4" (64cm) X X
GCO44C/GCO66C Electronic Electronic (4) 8" (20cm) X X X
*May be Painted or Stainless Steel with Adjustable Feet or Casters
/4" (64cm)
1
/4" (64cm)
Additional racks are available as accessories.
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INSTALLATION
UNPACKING
Immediately after unpacking the oven, check for possible shipping damage. If this 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 service and type of gas (natural or propane) agree with the
specifications on the oven data plate, located on the inside of the bottom front cover.
Do not use the doors or their handle to lift the oven.
LOCATION
The equipment area must be kept free and clear of combustibles. Maintain clearances from combustible or noncombustible construction for at least 6" (152.4mm) from the sides and 6" (152.4mm) from the back of the oven.
The installation location must allow adequate clearances for servicing and proper operation.
The oven must be installed so that the flow of combustion and ventilation air will not be obstructed. Adequate
clearance for air openings into the combustion chamber must be provided. Make sure there is an adequate
supply of air in the room to allow for that required for combustion of gas at the oven burners.
INSTALLATION CODES AND STANDARDS
Vulcan ovens must be installed in accordance with:
In the United States
1. State and local codes.
2. National Fuel Gas Code ANSI-Z223.1 (latest edition), available from American Gas Association, 1515
Wilson Boulevard, Arlington, VA 22209.
3. ANSI/NFPA 96, "Vapor Removal from Cooking Equipment" (latest edition), available from National Fire
Protection Association, Batterymarch Park, Quincy, MA 02269.
4. National Electrical Code, ANSI/NFPA-70 (latest edition).
In Canada
1. Local codes.
2. CAN/CGA-B149.1, "Natural Gas Installation Code" (latest edition).
3. CAN/CGA-B149.2, "Propane Installation Code" (latest edition), available from the Canadian Gas Association,
178 Rexdale Blvd., Etobicoke, Ontario, Canada M9W 1R3.
4. Canadian Electrical Code, CSA Standard C22.2 No. 3 (latest edition), "Electrical Features of Fuel Burning
Equipment."
INSTALLING BASIC OVEN
The basic oven must be installed on legs or be mounted on a modular stand. Installations on concrete bases
or other supports restricting air circulation underneath the oven is not advisable and may void the warranty.
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NOTICE: When the oven is mounted on casters, it must be installed with the casters supplied, a connector
(not supplied by Vulcan-Hart) complying with either ANSI Z21.69 (latest edition) or CAN/CGA-6.16
(latest edition), and a quick-disconnect device complying with either ANSI Z21.41 (latest edition) or CAN1-6.9
(latest edition). It must also be installed with restraining means to guard against transmission of strain to the
connector, as specified in the appliance manufacturer’s instructions. Attach the restraining device at the rear of
the oven. (Fig. 1).
CONNECT GAS
LINE STRAIN
PL-51216
RELIEF HERE
Fig. 1
ASSEMBLING THE LEGS TO THE OVEN
Unpack the oven and leg set.
Position oven on its back, taking care not to scratch or damage it. The gas pipe connection protrudes beyond
the back; provide for this when oven is tipped back by resting it on suitable spacers (2 x 4's etc.).
Attach each of the four leg assemblies to bottom of oven with the 24 bolts and lockwashers (6 per leg). Carefully
raise oven to its normal position.
LEVELING
Ensure that the oven racks are level in the final installed position. If the oven is installed on legs, turn adjustable
feet in or out to level oven front-to-back and side-to-side. If the oven is installed on casters, loosen set screws
and turn casters in or out to level oven front-to-back and side-to-side. Retighten set screws after leveling.
ASSEMBLING THE CHIMNEY AND FLUE EXTENSION
Remove the oven chimney and flue extension from the rear of the oven (motor compartment) and use the screws
provided to fasten the chimney to the top rear of the oven. Position the flanges on the chimney under the top
cover. Also attach the flue extension.
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ASSEMBLING STACKED OVENS
Unpack the ovens and stack kit. Position one oven on its back for access to the oven bottom, taking care not
to scratch or damage it. The gas pipe protrudes beyond the back; provide for this when the oven is tipped back
by resting it on suitable spacers (2 x 4's, etc.). Attach the four leg assemblies with the 24 bolts and lockwashers
(6 per leg).
Place lower oven (with legs) on floor and remove two 7⁄16" (11.1mm) diameter knockouts on each side of
top cover.
Install the two locating studs (included in leg stack set) into screw plates on underside of upper oven (Fig. 2)
Fig. 2 Fig. 3
Move the oven with legs to the installed position and place upper oven on top of lower oven using the locating
studs.
Insert the right angle short flue extension into the top oven. Install the long flue extension (Fig. 3) from the stack
kit over the right angle flue extension on the top oven. Insert the right angle of the long flue extension into the
bottom oven. Secure the flue extensions with the screws provided.
Install rear panels on both ovens. Install chimney (Fig. 3) on upper oven. Connect the piping between the top
oven and bottom oven. Pipe compound must be suitable for the type of gas being used (natural or propane).
The manual gas valve at the bottom of the control panel should remain off until all electrical connections are made
and the ovens are checked or used.
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ASSEMBLING THE OVEN TO THE STAND
Unpack the oven and stand. Position oven on its back, taking care not to scratch or damage it. The gas pipe
connection protrudes beyond the back; provide for this when the oven is tipped back by resting it on suitable
spacers (2 x 4's, etc.).
Install the two locating studs (included in the stand carton) into the screw plates on the underside of the oven
(see Fig. 2).
Attach each of the four leg assemblies to the bottom of the stand with the 24 bolts and lockwashers (6 per leg).
Mount the oven on top of the stand.
ELECTRICAL CONNECTIONS
WARNING: THE POWER SUPPLY CORD IS PROVIDED WITH A GROUNDING PLUG. THE OUTLET TO
WHICH THIS PLUG IS CONNECTED MUST BE PROPERLY GROUNDED. IF THE RECEPTACLE IS NOT THE
PROPER GROUNDING TYPE, CONTACT AN ELECTRICIAN.
The Model GCO Series Gas Convection Ovens are equipped with a 120 volt / 60 Hz. / 1 phase cord and plug.
A wiring diagram is located on the inside of the right side panel.
GAS AND ELECTRICAL DATA
GAS DATA ELECTRICAL DATA
MODEL INPUT BTU/HR MANIFOLD PRESSURE AMP LINE
Natural Propane Natural Propane 120 Volts
GCO4S
GCO4D/GCO6D 40,000 40,000 3.5" W.C. 10" W.C. 10 Amps
GCO4C/GCO6C (0.8 kPa)
GCO44S
GCO44D/66D 80,000 80,000 3.5" W.C. 10" W.C. 20 Amps
GCO44C/66C (0.8 kPa)
GAS CONNECTIONS
Gas supply connections and pipe joint compound must be suitable for sealing piping for propane or natural
gases.
The oven is provided with a regulator integral to the gas solenoid valve and requires no external regulator.
The manual gas shutoff valve is located at the bottom of the front control panel.
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