Hobart HGC20, ML-114573, ML-114575 User Manual
HGC20 & HGC20D
GAS CONVECTION OVENS
MODELS
HGC20 ML-114573
HGC20D ML-114575
701 S. RIDGE AVENUE
TROY, OHIO 45374-0001
937 332-3000
www.hobartcorp.com
FORM 33580 Rev. E (Mar. 2005)
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, 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.
© HOBART CORPORATION, 1996, 2005
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Installation, Operation, and Care of
HGC20 AND HGC20D
GAS CONVECTION OVENS
SAVE THESE INSTRUCTIONS FOR FUTURE USE
GENERAL
The HGC20 Gas Convection Oven is a single cavity oven and features a solid state thermostat,
1-hour dial timer, and five racks as standard equipment. Additional oven racks are optional. Each oven
is equipped with a 25,000 BTU/hr burner and a
with porcelain interior; stainless steel exterior.
Model HGC20D is similiar to model HGC20, except the HGC20D has either an electronic control or
programmable control package in place of the solid state controller.
Two single ovens can be ordered with a stacking kit for mounting one oven on top of the other.
1
/2 HP (0.37 kw) electric motor. The oven comes standard
A single oven may be installed on an open stand with lower storage rack (optional).
COOK & GENTLE RACK #
MODEL THERMOSTAT TIMER HOLD BAKE COOK TIMES
HGC20 Solid State 1-Hour Dial
HGC20D before Octover 1999 Electronic Electronic X X
HGC20D after October 1999 Programmable Programmable X X
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 supply and type of gas supply (natural or propane) agree
with the specifications on the oven data plate, located on the inside of the top front cover.
Do not use the door or its 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 3"
oven. The installation location must allow adequate clearances for servicing and proper operation.
(7.6 cm) from the side and 3" (7.6 cm) from the back of the
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.
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INSTALLATION CODES AND STANDARDS
Hobart ovens must be installed in accordance with:
In the United States of America:
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-70 (latest edition). Copies may be obtained from The
National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.
In Canada:
1. Local codes.
2. CSA B149.1 Natural Gas and Propane Installation Code.
3. CSA C22.2 Canadian Electrical Code.
The above are available from the Canadian Standard Association, 5060 Spectrum Way, Suite 100,
Mississauga, Ontario, Canada L4W 5N6.
Ovens Mounted on Casters
Ovens mounted on casters must use a flexible connector (not
supplied by Hobart) that complies with the Standard for Connectors
for Movable Gas Appliances, ANSI Z21.69 • CSA 6.16 and a quickdisconnect device that complies with the Standard for QuickDisconnect Devices for Use With Gas Fuel, ANSI-Z21.41 • CSA
6.9. In addition, adequate means must be provided to limit movement
of the appliance without depending on the connector and the quickdisconnect device or its associated piping to limit appliance
movement. Attach the restraining device at the rear of the oven as
shown in Fig. 1.
CONNECT
GAS LINE
STRAIN RELIEF
HERE
PL-53563
Fig. 1
If disconnection of the restraint is necessary, turn off the gas supply before disconnection. Reconnect
this restraint prior to turning the gas supply on and returning the oven to its installation position.
Separate instructions for installing casters to the oven are included with the casters.
Note: If the oven is installed on casters and is moved for any reason, it is recommended that the oven
be releveled front to back and side to side for even baking.
Assembling the Legs to the Single Oven
The 4"
(10 cm) or 6" (15 cm) legs are packed inside the oven during shipment and must be installed on
the bottom of the oven. Place the oven on its left side, being careful to avoid scratching the finish. 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.).
Thread each of the four leg assemblies into the holes provided on the bottom corners of the oven.
Carefully raise the oven to its normal upright position.
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Assembling the Chimney to the Single Oven
Remove the chimney from inside the oven cavity and use the
screws provided to fasten the chimney to the top rear of the oven
(Fig. 2). The flanges on the chimney are to be positioned over the
top cover.
ASSEMBLING THE OVEN TO THE STAND
Position the 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). Install the two locating studs (included in the stand carton)
into the screw plates on the underside of the oven (Fig. 3).
Attach each of the four leg assemblies to the bottom of the stand
with the 12 bolts and lockwashers (3 per leg). If casters are used
instead of legs, put fixed casters in rear and swivel casters in front
using 12 bolts and lockwashers (3 per caster). Mount the oven on
top of the stand.
ASSEMBLING STACKED OVENS
CHIMNEY
PL-52240
Fig. 2
FRONT OF TOP OVEN
LOCATING STUDS
Determine which oven will be on the bottom and place it on its left
side, being careful to avoid scratching the finish. Install the four 163/4"
(42.5 cm) legs, using the 24 bolts and lockwashers provided (6 per
leg). Remove the two
7
/16" (1.1 cm) knockouts on each side of the top
cover and place oven in upright position at installation location.
Turn the adjustable feet in or out to level the oven front-to-back and
side-to-side (refer to LEVELING, page 6).
Remove right-hand side panels from both ovens. Remove welded
plate from bottom of upper oven (Fig.3). Install the two locating
studs (included in leg stack set) into screw plates on underside of
upper oven (Fig. 3). Place upper oven on top of lower oven using
the locating studs.
Remove flue extension from upper oven. Install long flue extension
into existing right-angled flue extension in lower oven. Attach long
flue extension to wall of upper oven using screws provided. Secure
chimney to roof of upper oven (Fig. 4).
Install right side panels on both ovens. Connect the piping between
the top oven and bottom oven. Pipe compound must be resistant
to the action of propane gases.
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.
BOTTOM
KNOCK OUT WELDED PLATE
FOR FLUE EXTENSION INSTALLATION
REAR OF TOP OVEN
PL-52992
Fig. 3
CHIMNEY
LONG FLUE
EXTENSION
RIGHT ANGLED
FLUE EXTENSION
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PL-52221
Fig. 4
LEVELING
Once the oven is in its permanent position, place a carpenter's level on the oven rack. If the oven is
installed on legs, turn the 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.
ELECTRICAL CONNECTIONS
WARNING: ELECTRICAL AND GROUNDING CONNECTIONS MUST COMPLY WITH THE
APPLICABLE PORTIONS OF THE NATIONAL ELECTRICAL CODE AND/OR OTHER LOCAL
ELECTRICAL CODES.
WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AND FOLLOW
LOCKOUT / TAGOUT PROCEDURES.
WARNING: APPLIANCES EQUIPPED WITH A FLEXIBLE ELECTRIC SUPPLY CORD ARE
PROVIDED WITH A THREE-PRONG GROUNDING PLUG. IT IS IMPERATIVE THAT THIS PLUG
BE CONNECTED INTO A PROPERLY GROUNDED THREE-PRONG RECEPTACLE. IF THE
RECEPTACLE IS NOT THE PROPER GROUNDING TYPE, CONTACT AN ELECTRICIAN. DO
NOT REMOVE THE GROUNDING PRONG FROM THIS PLUG.
The 120 volt models are equipped with a cord and plug.
Refer to electrical wiring diagram located inside the right side panel; remove control panel for access.
Do not turn the power supply on until after the gas connections have been made and checked for leaks.
ELECTRICAL DATA
Minimum Circuit Ampacity
Maximum Protective Device
MODEL Volts Hertz Phase AMPS
120 60 1 15
HGC20 200 - 240 50 1 15
200 - 240 60 1 15
HGC20D
Complied in accordance with the National Electrical Code, NFPA-70 (latest edition).
120 60 1 15
200 - 240 50 / 60 1 15
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