Hobart HGC20, ML-114573, ML-114575 User Manual

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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 1/2 HP (0.37 kw) electric motor. The oven comes standard 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. 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" (7.6 cm) from the side and 3" (7.6 cm) 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.

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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

Fig. 1

PL-53563

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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Hobart HGC20, ML-114573, ML-114575 User Manual

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

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.

CHIMNEY

PL-52240

Fig. 2

FRONT OF TOP OVEN

LOCATING STUDS

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

PL-52221

Fig. 4

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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

120

60

1

15

 

 

 

 

200 - 240

50 / 60

1

15

 

 

 

 

 

 

Complied in accordance with the National Electrical Code, NFPA-70 (latest edition).

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