Hobart ML-126185, ML-126187, HGC6024, ML-126183, HGC4824 User Manual

MODEL HGC SERIES GAS CONVEYOR OVENS

MODELS

HGC3018 ML-126180 HGC4018 ML-126181 HGC3624 ML-126182 HGC3632 ML-126183 HGC4824 ML-126184 HGC4832 ML-126185 HGC6024 ML-126186 HGC6032 ML-126187

701 S. RIDGE AVENUE

TROY, OHIO 45374-0001

FORM 34069 (6-98)

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, 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Installation Codes and Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Gas Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Testing the Gas Supply System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Alternate Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Before First Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Lighting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Using the Oven. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Conveyor Belt Assembling and Disassembling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Cooking Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Service and Parts Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

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Installation, Operation and Care of

MODEL HGC SERIES GAS CONVEYOR OVENS

PLEASE KEEP THIS MANUAL FOR FUTURE USE

GENERAL

Hobart 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.

INSTALLATION

Before installing, verify that the electrical service and type of gas supply (natural or propane) agree with the specifications on the rating plate located on the right front side panel. If the supply and equipment requirements do not agree, do not proceed with the installation. Contact your Hobart service representative immediately.

UNPACKING

This oven was inspected before leaving the factory. The transportation company assumes full responsibility for safe delivery upon acceptance of the shipment. 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.

1. Tilt the oven on its back side.

2. Place the oven on a four-wheel dolly.

3. Move oven to its installation position.

4. Remove the oven from the dolly and place on two pieces of 2 x 4 wood.

5. Carefully unpack the oven.

Do not use the door or the handle to lift the oven.

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LOCATION

When the crate is turned on its side, the oven will pass through a 34" (86 cm) door opening (or 30" [76 cm] opening without the crate). Verify that the doors and access routes into the kitchen area will permit clearance.

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

When installed, minimum clearance from combustible and non-combustible construction must be 2.5" (63.5 mm) at the sides and 2.5" (63.5 mm) at the rear.

The installation location must allow adequate clearances for servicing and proper operation. A minimum front clearance of 36" (914.4 mm) is required.

Do not obstruct the flow of combustion and ventilation air.

• Adequate clearance for air openings into the oven must be provided.

• Make sure there is an adequate supply of air in the room to replace air taken out by the ventilating system.

• The ventilation hood should extend 6" (152 mm) minimum past the oven on the front, back, and each side of the conveyor belt.

Information on the construction and installation of ventilating hoods may be obtained from the standard for "Vapor Removal from Cooking Equipment," NFPA No. 96 (latest edition), available from the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269.

Exhaust: Approximately 2000 CFM required for double stacked ovens.

Approximately 1500 CFM required for single oven. Make-up air should be 65% to 80% of the exhaust air rating.

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.

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INSTALLATION CODES AND STANDARDS

The oven 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. 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 C22.2 No. 3 (latest edition). Copies may be obtained from The Canadian Standard Association, 178 Rexdale Blvd., Etobicoke, Ontario, Canada M9W 1R3.

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ASSEMBLY

Ovens Mounted on Legs or Feet

To service the oven when mounted on legs or feet, a minimum clearance of 18" (457 mm) from service compartment is required.

Ovens Mounted on Casters

NOTICE: In order to be able to service this appliance, it must be installed with the casters supplied, a connector complying with ANSI Z21.69 or CAN/CGA-6.16, and a quick-disconnect device complying with ANSI Z21.41 or CAN1-6.9. It must also be installed with restraining means to guard against transmission of strain to the connector, as specified in the appliance manufacturer's installation instructions.

Attach the restraining device at the rear of the oven (Fig. 1).

If disconnection of the restraint is necessary:

1. Turn off the gas supply before disconnection.

2. Reconnect restraint before turning on the gas supply.

3. Return the oven to its installation position.

CONNECT GAS LINE STRAIN RELIEF HERE

Fig. 1

Installing Basic Oven

1. Attach the front legs by screwing them into the bottom of the oven.

2. Tilt oven forward resting it on the front legs.

3. Lift the oven from the rear.

4. Once the oven is lifted, attach the back legs.

5. Place the oven in its operating position.

PL-41122

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Installing Stacked Ovens

After basic oven is installed:

• Lift the top oven and place it on top of the bottom oven.

• No fasteners are required; the weight of the oven will keep it in place.

LEVELING

Casters for this oven are of the non-adjustable type. For best results, oven should be installed on a level floor.

GAS CONNECTIONS

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

Location of the

⁄4" gas inlet is at the back of the oven on the lower right side.

Codes require that a gas shutoff valve (available from Hobart) must be installed in the gas line ahead of the oven.

Connect gas supply. Make sure the pipes are clean and free of obstructions.

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

Natural gas and propane gas are preset at the factory for proper operation. Store line pressures are preset for 7" W.C. (Water Column) (1.75 kPa) for natural gas and 11" W.C. (2.75 kPa) for propane gas.

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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