Hobart Food Machines DGC502 Installation Manual

DGC5 & HGC5 SERIES GAS CONVECTION OVENS

MODELS

DGC5 ML-126614 HGC5 ML-126615 HGC5X ML-126618 HGC5D ML-126616 HGC5DX ML-126619

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

937 332-3000

www.hobartcorp.com

FORM 34312 Rev. E (Apr. 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.

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Installation, Operation and Care of

DGC5 & HGC5 SERIES

GAS CONVECTION OVENS

SAVE THESE INSTRUCTIONS FOR FUTURE USE

GENERAL

Hobart DGC5 & HGC5 Series Gas Convection Ovens are produced with quality workmanship and material. Proper installation, usage and maintenance of your oven will result in many years of satisfactory performance.

It is suggested that you thoroughly read this entire manual and carefully follow all of the instructions provided.

Models DGC5, HGC5 and HGC5X feature a solid state temperature control. Models HGC5D and HGC5DX feature programmable controls. One-hour dial timer and buzzer and two-speed

/2 HP (0.37 kw) electric motor are standard equipment. Porcelain interior is standard on all models; stainless steel interior is optional. The burner input rating for each oven is 44,000 BTU/hr.

Models HGC5X and HGC5DX have a 4 inches (10 cm) deeper oven cavity.

Hobart offers a stacking kit for mounting one oven on top of another as an option.

The standard 120 V, 60 Hz, 1 PH ovens include cord and plug. Optional electrical specifications require hard wire connection.

On model DGC5, independent door opening is standard and simultaneous door opening is optional. On models HGC5, HGC5X, HGC5D and HGC5DX, simultaneous door opening is standard and independent door opening is optional. All ovens are furnished with five racks.

Other available options include: 5-hour timer, 208/240 V electrical service, additional oven racks, an open stand with lower storage rack and cook and hold.

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– 3 –

INSTALLATION

Before installing, verify that the electrical service and type of gas supply (natural or L.P. gases) agree with the specifications on the rating plate, located behind the top trim panel on the front of the oven. If the supply and equipment requirements do not agree, do not proceed with the installation. Contact your dealer or Hobart Corporation immediately.

UNPACKING

Immediately after unpacking, 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.

Carefully unpack oven and place in a work-accessible area near to its final installed position.

Do not use the doors or their handles to lift the oven.

LOCATION

The equipment area must be kept free and clear of combustible substances.

When installed, minimum clearance from combustible construction must be 1 inch (2.5 cm) at the left side, 4 inches (10 cm) at the right side and 6 inches (15 cm) at the rear. Minimum clearance from noncombustible construction must be 0 inch and 6 inches (15 cm) at the rear. The oven may be installed on combustible floors.

(0 cm) at the left side, 4 inches (10 cm) at the right side

The installation location must allow adequate clearances for servicing and proper operation. For solid state and digital control models, there must be 18 inches (46 cm) of clearance on the right side of the oven from any open flame.

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 combustion of gas at the oven burners.

Do not permit fans to blow directly at the oven. Wherever possible, avoid open windows next to the oven. Avoid wall-type fans which create air cross currents within the room.

INSTALLATION CODES AND STANDARDS

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.

4. Vapor Removal From Cooking Equipment

The National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

, NFPA-96 (latest edition). Copies may be obtained from

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In Canada:

1. Local codes.

2. CSA B149.1 Natural Gas and Propane Installation Code.

3. STANDARD C22.1 Canadian Electric Code (latest edition).

4. CSA C22.1 Canadian Electric Code (latest edition).

5. CSA C22.2 No. 3 Canadian Electric Code (latest edition).

6. CSA Standard C22.2 No. 3

Electrical Features of Fuel Burning Equipment

(latest edition).

The above are available from the Canadian Standard Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N6.

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.

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 quick-disconnect device that complies with the Standard for Quick-Disconnect 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 quick-disconnect 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

Remove two screws from the rear of the oven and install the tiedown strap shipped with the casters using these screws (Fig. 1).

Fig. 1

Attach the gas line strain relief to the tie-down strap at the rear of the oven (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.

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Assembling the Legs to the Oven

The legs must be installed on the bottom of the oven. Gently position the oven on its side, taking care not to scratch or damage it.

Attach each of the four leg assemblies to the bottom of the oven with the 24 bolts and lockwashers (six per leg). Carefully raise the oven to its normal position.

ASSEMBLING THE STAND TO THE OVEN

Attach each of the four leg assemblies to the bottom of the oven with the 24 bolts and lockwashers (six per leg). Carefully raise the oven to its normal position.

Attach the undershelf to the legs with eight bolts and lockwashers (two per leg).

Install the rack guides into the undershelf at desired locations (for pan or flat rack), then attach the rack supports to the top end of the rack guides. Attach rack supports to the leg assembly by removing one middle bolt and reattaching back through the end holes in the rack support (Fig. 2).

BACK

FRONT

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RACK GUIDE

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Fig. 2

ASSEMBLING STACKED OVENS

Unpack the ovens and stack kit. Position the oven to be used as the bottom 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 (six per leg).

Place the lower oven (with legs) on the floor

and remove two

/16 inch (1.1 cm) diameter knockouts on each side of the top cover. Remove vent guard and discard it.

Move the oven with legs to the installed position and place upper oven on top of lower oven using the locating studs.

Install the stacking flue (Fig. 3) with the four screws provided.

STACKING FLUE

Connect the piping between the top oven and bottom oven. For all gas supply connections, pipe joint compound must be resistant to the action of propane gases.

PL-53564

Fig. 3

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LEVELING

Ensure that the oven racks are level in the final installed position. If the oven is installed on legs, turn the adjustable feet in or out to level the 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 the oven front-to-back and side-to-side. Retighten set screws after leveling.

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Gas supply connections and any pipe joint compound must be resistant to the action of propane gases.

Location of the gas inlet is at the rear of the oven. Codes require that a gas shutoff valve must be installed in the gas line ahead of the oven.

Connect gas supply after leveling the oven. The gas supply line must be at least the equivalent of

/4 inch (1.9 cm) iron pipe. Make sure the pipes are clean and free of obstructions, dirt or pipe joint

compound.

The ovens are equipped with fixed burner orifices which coincide with installation elevation.

The oven is provided with a regulator integral to the gas solenoid valve and requires no external regulator.

Natural gas pressure regulators are preset for 3.5 inches W.C. (Water Column) (0.9 kPa); propane gas pressure regulators are preset for 10 inches W.C. (2.5 kPa).

WARNING: PRIOR TO LIGHTING, CHECK ALL JOINTS IN THE GAS SUPPLY LINE FOR LEAKS. USE SOAP AND WATER SOLUTION. DO NOT USE AN OPEN FLAME.

After piping has been checked for leaks, all piping receiving gas should be fully purged to remove air.

TESTING THE GAS SUPPLY SYSTEM

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

/2 psig (3.45 kPa) or less, the oven should be isolated from the gas supply

system by closing its individual manual shutoff valve.

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BURNER AIR ADJUSTMENT

Although main burner air is adjusted before shipment, it should be checked at the time of installation. Excessive air will cause flames to lift off a burner when cold or may cause flash-back during normal cycling of oven, particularly when propane gas is used.

Insufficient air will cause flames to burn with a yellow tip and result in carbon accumulation in the flame chamber and heat exchanger tubes.

Contact your local Hobart servicer if required.

VENT SYSTEM

Do not obstruct the flow of flue gases from the flue located on the rear of the oven. It is recommended that the flue gases be ventilated to the outside of the building through a ventilation system installed by qualified personnel.

Ovens may use an optional down-draft diverter flue method. This optional down-draft diverter must be purchased from the oven manufacturer and vented to the outside; otherwise, the installation of any such device will void all oven certifications and warranties. When the diverter is supplied, it may be connected to a Type “B” vent.

From the termination of the flue to the filters of the hood venting system, a minimum clearance of 18 inches (45 cm) should be maintained.

Information on the construction and installation of ventilating hoods may be obtained from the standard

Vapor Removal from Cooking Equipment

for

, NFPA No. 96 (latest edition), available from the National

Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

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.

DGC and HGC Series ovens with a 120 V/60 Hz/1 PH electrical specification are equipped with a cord and plug as standard equipment.

A wiring diagram is located on the inside of the control housing.

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