Uniflame Gbc1069wb-c Owner's Manual

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OWNER’S MANUAL

Outdoor LP Gas Barbecue Grill

Model No. GBC1069WB-C

Natural gas conversion kit is available, model number VFK1000W-C.

WARNING

FOR YOUR SAFETY:

For Outdoor Use Only

(outside any enclosure)

WARNING

FOR YOUR SAFETY:

1.Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage.

2.Read the installation, operation and maintenance instructions thoroughly before installing or servicing this equipment.

3.Failure to follow these instructions could result in fire or explosion, which could cause property damage, personal injury or death.

Save these instructions for future reference.

If you are assembling this unit for someone else, give this manual to him or her to read and save for future reference.

Made from 70% Bagasse

(Environmentally Friendly Sugar

Cane Pulp By-product)

Table of Contents

 

Important Safeguards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Page 2

Exploded View & Hardware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . 3

Assembly Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 4

Installling LP Gas Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Insert LP Gas Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Secure LP Gas Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Connect LP Gas Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Disconnect LP Gas Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Installling Natural Gas Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Operating Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Checking for Leaks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . 9

Operating Main Burners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 10

Operating Sear Burner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 11

Operating Infrared Back Burner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 11

Operating the Digital Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 11

Cleaning and Care . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 12

Product Registration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 12

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 12

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . 13

The use and installation of this product must conform to local codes. In absence

of local codes, use the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Natural Gas

and Propane Installation Code, CSA B149.1, or Propane Storage and Handling Code,

B149.2.

 

Manufactured in China for: Blue Rhino Global Sourcing, Inc

Winston-Salem, NC USA • 1.800.762.1142, www.bluerhino.com

© 2010 Blue Rhino Global Sourcing, Inc. All Rights Reserved

 

UniFlame® is a Registered Trademark of Blue Rhino Global Sourcing, Inc.. All Rights Reserved.

GBC1069WB-C-OM-102 EF

GOLD

Outdoor LP Gas Barbecue Grill Model No. GBC1069WB-C

DANGER

If you smell gas -

1.Shut off gas to appliance.

2.Extinguish any open flame.

3.Open lid.

4.If odor continues, keep away from the appliance and immediately call your gas supplier or your fire department.

WARNING

FOR YOUR SAFETY

1.Do not store or use gasoline or other flammable liquids or vapors in the vincinity of this or any other appliance.

2.An LP cylinder not connected for use shall not be stored in the vicinity of this or any other appliance.

DANGER: Failure to follow the dangers, warning and cautions in this manual may result in serious bodily injury or death, or in a fire or an explosion causing damage to property.

WARNING:

This grill is for outdoor use only, and shall not be used in a building, garage or any other enclosed area.

Do NOT operate, light or use this appliance within 8 feet of walls, structures or buildings.

For residential use only. This grill is NOT for commercial use.

This grill is safety certified for use in the United States and Canada only. Do not modify for use in any other location. Modification will result in a safety hazard and will void your warranty.

This grill, from the factory, is for use with liquid propane (LP) gas. The natural gas conversion kit model number VFK1000W-C may be used to convert your grill to natural gas. The use of any other conversion kit is dangerous and will void your warranty.

Installation and repairs should be done by a qualified service person. LP gas Characteristics:

a.LP gas is flammable and hazardous if handled improperly. Become aware of the characteristics before using any LP gas product.

b.LP gas is explosive under pressure, heavier than air and settles and pools in low areas.

c.LP gas in its natural state has no odor. For your safety, an odorant is added that smells like rotten cabbage.

d.Contact with LP gas can cause freeze burns to skin.

Natural Gas (NG) Characteristics:

a.NG is flammable and hazardous if handled improperly. Become aware of the characteristics before using any NG product.

b.NG is explosive under pressure, heavier than air and settles and pools in low areas.

c.NG in its natural state has no odor. For your safety, an odorant is added that smells like rotten cabbage.

d.Contact with NG can cause freeze burns to skin.

Only LP tanks marked “propane” may be used.

The LP gas supply tank must be constructed and marked in accordance with the

Specifications for LP gas Cylinders of the U.S. Department of Transportation (DOT) or the National Standard of Canada, CAN/CSA-B339, Cylinders, Spheres and Tubes for the Transportation of Dangerous Goods; and Commission.

LP gas tank must be arranged for vapor withdrawal.

The LP gas tank must have a listed overfilling prevention device (OPD).

Only use LP gas cylinders equipped with a cylinder connection device compatible with the connection for outdoor cooking appliances.

The LP gas tank must have a tank collar to protect the tank valve. Never use an LP gas tank with a damaged body, valve, collar or footing.

Dented or rusted LP gas tanks may be hazardous and should be checked by your LP gas supplier prior to use.

The LP gas tank should not be dropped or handled roughly.

Tanks must be stored outdoors out of the reach of children and must not be stored in a building, garage or any other enclosed area. Your tank must never be stored where temperatures can reach over 125°F.

Do not insert any tool or foreign object into the valve outlet or safety relief valve. You may damage the valve and cause a leak. Leaking propane may result in explosion, fire, severe personal injury or death.

Do not block holes in sides or back of grill.

Never keep a filled LP gas tank in a hot car or car trunk. Heat will cause the gas pressure to increase, which may open the relief valve and allow gas to escape.

Place dust cap on cylinder valve outlet whenever the cylinder is not in use. Only install the type of dust cap on the cylinder valve outlet that is provided with the cylinder valve. Other types of caps or plugs may result in leakage of propane.

Disconnect cylinder when not in use.

Do not store a spare LP gas tank under or near this appliance. Never fill the tank beyond 80 percent full.

A fire causing serious injury or damage to property may occur if the above is not followed exactly.

Never attempt to attach this grill to the self-contained LP gas system of a camper trailer, motor home or house.

The use of alcohol, prescription or non-prescription drugs may impair the consumer’s ability to properly assemble or safely operate the appliance.

Strong odors, colds, sinus congestion, etc. may prevent the detection of propane. Use caution and common sense when testing for leaks.

Never use charcoal, lighter fluid, lava rocks, gasoline, kerosene or alcohol with this product.

Your grill has been checked at all factory connections for leaks. Recheck all connections as described in the “Operating Instructions” section of the manual, as movement in shipping can loosen connections.

Check for leaks even if your unit was assembled for you by someone else.

Do not operate if gas leak is present. Gas leaks may cause a fire or explosion. You must follow all leak-checking procedures before operating. To prevent fire or explosion hazard when testing for a leak:

a.Always perform leak test before lighting the grill and each time the tank is connected for use.

b.No smoking. Do not use or permit sources of ignition in the area while conducting a leak test.

c.Conduct the leak test outdoors in a well-ventilated area.

d.Do not use matches, lighters or a flame to check for leaks.

e.Do not use grill until any and all leaks are corrected.

LP: If you are unable to stop a leak, disconnect the LP gas supply. Call a gas appliance serviceman or your local LP gas supplier.

NG: If you are unable to stop a leak, turn off the main valve on the NG supply line. Call a gas appliance serviceman or your local NG supplier.

NG: The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at a pressures in excess of 1/2 psig (3.5 kpa).

NG: The appliance must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.5 kpa).

This grill is designed with to operate at an inlet pressure of: LP gas: 11 inches water column; NG 7 inches water column.

Do not store or use gasoline or other flammable liquids or vapors within 25 feet (7.62 m) of this appliance.

Do not use in an explosive atmosphere. Keep grill area clear and free from combustible materials, gasoline and other flammable vapors and liquids.

Minimum clearance from sides and back of unit to combustible construction, 36 inches from side and 36 inches from back. Do not use this appliance under overhead combustible surfaces.

It is essential to keep the grill’s valve compartment, burners and circulating air passages clean. Inspect grill before each use.

Do not alter grill in any manner. Any altering will void your warranty.

Do not use the grill unless it is COMPLETELY assembled and all parts are securely fastened and tightened.

Do not build this grill in any built-in or slide in construction. Ignoring this warning could cause a fire or an explosion that can damage property and cause serious bodily injury or death.

This grill should be thoroughly cleaned and inspected on a regular basis. Clean and inspect the hose before each use of the appliance. If there is evidence of abrasion, wear, cuts or leaks, the hose must be replaced prior to the appliance being put into operation. Use only the regulator and hose assembly provided. The replacement regulator and hose assembly shall be that specified by the manufacturer.

Use only Blue Rhino Global Sourcing, Inc. factory authorized parts. The use of any part that is not factory authorized can be dangerous and will void your warranty.

Do not use this appliance without reading “Operating Instructions” in this manual.

Do not touch metal parts of grill until it has completely cooled (about 45 min.) to avoid burns, unless you are wearing protective gear (pot holders, gloves, BBQ mittens, etc.). When cooking, fire extinguishing materials shall be readily accessible. In the event of an oil/grease fire, do not attempt to extinguish with water. Use type BC dry chemical fire extinguisher or smother with dirt, sand or baking soda.

Do not install or use in or on boats or recreational vehicles. Do not use grill in high winds.

Never lean over the grill when lighting.

Do not leave a lit grill unattended, especially keep children and pets away from grill at all times.

Do not attempt to move grill when in use. Allow the grill to cool before moving or storing.

LP gas tank must be properly disconnected and removed prior to moving this grill. Storage of grill indoors is permissible only if the tank is disconnected, removed from the grill and properly stored outdoors.

Always open grill lid carefully and slowly as heat and steam trapped within grill can severely burn you.

Do not attempt to disconnect the gas regulator from the tank or any gas fitting while the grill is in use.

Always place your grill on a hard, non-combustible, level surface. An asphalt or blacktop surface may not be acceptable for this purpose.

Move gas hoses as far away as possible from hot surfaces and dripping hot grease. Keep all electrical cords away from a hot grill.

All electrical accessories (such as rotisserie) must be electrically grounded in accordance with local codes, or National Electrical Code, ANSI / NFPA 70 or Canadian Electrical Code, CSA C22.1. Keep any electrical cords and/or fuel supply hoses away from any hot surfaces.

Do not use grill for indoor cooking or heating. TOXIC fumes can accumulate and cause asphyxiation.

After a period of storage and/or nonuse, check for leaks, burner obstructions and inspect for any abrasion, wear or cuts to the hose.

Failure to open lid while igniting the grill’s burners, or not waiting 5 minutes to allow the gas to clear if the grill does not light, may result in an explosive flame-up.

If grill is not in use, the gas must be turned off at the supply tank. Never operate grill without heat plates installed.

Always use a meat thermometer to ensure food is cooked to a safe temperature. Use protective gloves when assembling this product.

Do not force parts together as this can result in personal injury or damage to the product.

Never cover entire cooking area with aluminum foil.

Deaths, serious injury or damage to property may occur if the above is not followed exactly.

Uniflame Gbc1069wb-c Owner's Manual

 

page no.

Contact 1.800.762.1142 for assistance. Do not return to place of purchase.

3

 

 

 

Parts List

1

Warming Rack A

55-10-268

 

 

 

2

Warming Rack B

55-10-269

 

 

 

3

Cooking Grid (3)

55-10-270

 

 

 

4

Heat Plate (3)

55-10-271

 

 

 

5

Temperature Gauge (2)*

55-09-364

 

 

 

6

Grease Tray

55-10-272

 

 

 

7

Grease Cup

55-09-346

 

 

 

8

Tool Bar

55-07-548

 

 

 

9

Tool Hook (4)*

55-07-729

 

 

 

10

Side Shelf End (2)

55-10-273

 

 

 

11

Left Side Shelf

55-10-274

 

 

 

12

Left Side Shelf Front

55-10-275

Panel

 

 

13

Digital Timer*

55-08-073

 

 

 

14

Lid Handle Support (4)*

55-10-276

 

 

 

15

Lid Handle A*

55-10-277

 

 

 

16

Lid Handle B*

55-10-278

 

 

 

17

Lid A*

55-10-279

 

 

 

18

Lid B*

55-10-280

 

 

 

19

Infrared Back Burner*

55-10-281

 

 

 

20

Main Burner (3)*

55-10-282

 

 

 

21

Infrared Sear Burner*

55-10-283

 

 

 

22

Grill Body Assembly*

55-10-284

 

 

 

23

Control Knob Bezel (5)*

55-08-071

 

 

 

24

Control Knob (5)

55-09-341

 

 

 

25

Regulator/Hose

55-10-285

Assembly*

 

 

 

 

 

26

Right Side Shelf

55-10-286

 

 

 

27

Right Side Shelf Front

55-10-287

Panel

 

 

28

Door Handle Support (4)

55-10-288

 

 

 

29

Right Door Handle

55-10-289

 

 

 

30

Right Door

55-10-290

 

 

 

31

Lighting Rod*

55-07-520

 

 

 

32

Left Door

55-10-291

 

 

 

33

Left Door Handle

55-10-292

 

 

 

34

Left Cart Frame Panel

55-10-293

 

 

 

35

Front Cart Frame Support

55-10-294

 

 

 

36

Rear Cart Frame Panel

55-10-295

 

 

 

37

Right Cart Frame Panel

55-10-296

 

 

 

38

Basket (2)

55-10-297

 

 

 

39

Bottom Cart Frame

55-10-298

Assembly

 

 

 

 

 

40

Basket Support A

55-10-299

 

 

 

41

Basket Support B (4)

55-10-300

 

 

 

42

Locking Caster (2)

55-07-528

 

 

 

43

Caster (2)

55-07-506

 

 

 

44

LP Gas Tank Wire

55-10-355

* Pre assembled

Exploded View

 

1

3

 

3

2

 

4

3

 

9

 

17

5

8

 

10

15

14

 

 

 

 

11

19

6

 

 

16

12

 

20

18

 

 

 

13

 

 

 

7

 

 

 

 

 

23

 

 

 

 

 

28

 

 

 

 

 

 

 

21

22

 

 

 

30

 

 

 

 

 

 

 

 

 

 

 

29

24

 

 

 

 

 

 

 

 

 

 

 

 

 

31

 

25

 

26

 

 

 

 

 

 

 

 

 

 

 

 

 

 

27

10

 

 

 

34

 

 

 

 

33

32

 

 

 

 

 

 

 

 

 

 

 

 

28

 

 

35

 

36

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

44

 

 

 

38

 

 

 

 

 

 

 

 

 

 

 

 

 

37

38

 

 

 

 

 

39

 

 

 

 

 

 

 

 

 

 

 

 

42

 

40

41

 

 

 

 

 

 

 

43

Hardware

 

A

Screw

M4x12 Nickel Plated Phillips Truss Head

15 pcs

 

B

Screw

M5x12 Nickel Plated Phillips Truss Head

4 pcs

 

C

Screw

M6x15 Nickel Plated Phillips Truss Head

23 pcs

 

D

Screw

M6x45 Nickel Plated Phillips Truss Head

4 pcs

 

E

Bolt

M6x15 Nickel Plated Hex Head

22 pcs

 

F

Washer

ø6.5 Nickel Plated

8 pcs

 

G

AAA Battery

 

2 pcs

 

 

Tools Required for Assembly (Included)

 

 

#1 Phillips Head Screwdriver

1 pc

#2 Phillips Head Screwdriver

1 pc

M10-M6 Wrench

1 pc

GOLD

Outdoor LP Gas Barbecue Grill Model No. GBC1069WB-C

Assembly Instructions

1

DO NOT RETURN PRODUCT TO STORE.

2

Attach Casters

For assistance call 1.800.762.1142 toll free. Please have

Note: Locking wheels should be placed at the back.

your owner’s manual and model number available for

 

 

reference.

 

 

 

Note: The model number can be found on the back of the cart

 

 

 

assembly.

 

Front

For Easiest Assembly:

43

 

• To avoid losing any small components or hardware, assemble your product on a hard level surface that does not have cracks or openings.

Clear an area large enough to layout all components and hardware.

When applicable, tighten all hardware connections by hand first. Once the step is completed go back and fully tighten all hardware.

• Follow all steps in order to properly assemble your product.

42

To complete assembly you will need:

(1) Leak Detection Solution (Instructions on how to make solution are included in the “Operating Instructions” section of this manual)

LP: (1) Precision Filled LP Gas Grill Tank with Acme Type 1 external threaded valve connection (4-5 gallon size)

NG: (1) Natural Gas Conversion Kit, model number VFK1000W-C (not included)

Typical assembly: approximately 1 (one) hour.

 

 

 

3 Attach Left, Right and Rear Cart Frame Panels

4 Attach Front Cart Frame Support

 

 

A

x 4

F

x 4

 

 

 

C

x 11

D

 

x 4

 

 

 

 

 

page no.

Contact 1.800.762.1142 for assistance. Do not return to place of purchase.

5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5 Attach Basket Support A and Basket Support B (4)

6 Assemble Left Door Handle

A

x 1

C

x 12

B

x 2

 

 

 

 

7 Assemble Right Door Handle

8 Attach Doors and Insert Baskets

B

x 2

GOLD

Outdoor LP Gas Barbecue Grill Model No. GBC1069WB-C

Assembly Instructions (continued)

 

 

 

 

 

9

Attach Grill Body Assembly

10

Remove Digital Timer Battery Cover

 

 

Note: Regulator/Hose Assembly Must be placed inside cart assembly. Make sure hose is not kinked or pinched before securing grill body assembly.

Install AAA Battery (2) and Replace Cover

Note: Remove protective plastic from batteries before installing.

E

x 4

F

x 4

G

x 2

 

 

 

 

 

 

 

 

 

 

11 Assemble Left Side Shelf

12 Assemble Right Side Shelf

A

x 5

E

x 4

A

x 5

E

x 2

 

 

 

 

 

 

 

page no.

Contact 1.800.762.1142 for assistance. Do not return to place of purchase.

7

 

 

 

 

 

 

 

 

 

 

 

 

13

Attach Left Side Shelf Assembly

14

Attach Right Side Shelf Assembly

Note: Leave 5 mm of bolt threads exposed. Do not fully tighen until step 15.

Note: Leave 5 mm of bolt threads exposed. Do not fully tighen until step 15.

E

x 2

E

x 2

 

 

 

15

Secure Side Shelves

16

Attach Control Knobs

Note: Tighten screws from steps 13 and 14.

 

E

x 8

GOLD

Outdoor LP Gas Barbecue Grill Model No. GBC1069WB-C

Assembly Instructions (continued)

 

 

 

 

 

17

Insert Heat Plates

18

Insert Cooking Grids and Warming Racks

 

 

 

 

 

19

Insert Grease Tray and Grease Cup

 

Natural gas conversion kit is available,

 

 

 

 

model number VFK1000W-C.

 

 

 

 

 

page no.

Contact 1.800.762.1142 for assistance. Do not return to place of purchase.

9

 

 

 

Installing LP Gas Tank

To operate you will need (1) precision-filled standard grill LP gas tank (20#) with external valve threads.

Note: An empty standard grill LP gas tank weighs approximately 18 lbs. A precision-filled standard grill LP gas tank should weigh no more than 38 lbs.

Caution: LP gas tank must be properly disconnected and removed prior to moving this grill.

Insert LP Gas Tank

Place precision filled LP gas tank upright into hole in grill body so the tank valve is facing the gas line connection.

Secure LP Gas Tank

Turn wing nut clockwise until tight.

Connect LP Gas Tank

Before connecting, be sure that there is no debris caught in the head of the LP gas tank, head of the regulator valve or in the head of the burner and burner ports.

Connect gas line to tank by turning knob clockwise until it stops.

Disconnect LP Gas Tank

Before disconnecting make sure the LP gas tank valve is “CLOSED”.

Disconnect gas line from LP gas tank by turning knob counterclockwise until it is loose.

Caution: LP gas tank must be properly disconnected and removed prior to moving this grill.

Need a tank of gas? Try tank exchange service. It’s easy, fast, safe, and available at tens of thousands of conveniently located retail outlets

nationwide. You can purchase a new full tank or exchange your empty for a precision filled one.

Installing Natural Gas Line

Installation should be done by a qualified service

Figure 1

person.

 

CAUTION: If young children are in the area, a locking valve should be considered.

Connect Natural Gas Line

Before connecting, be sure that there is no debris caught in the head of the natural gas line, head of the grill natural gas line or in the head of the burner and burner ports.

Connect grill natural gas line to natural gas line.

Disconnect Natural Gas Line

Before disconnecting make sure the natural gas line valve is “OFF”.

Disconnect grill natural gas line from natural gas line.

Operating Instructions

Checking for Leaks

Figure 2

Back Burner Soft Pipe

Burner

Connection

venturi

 

pipe

X

Valve

 

LP Gas

Soft Pipe

 

 

Valve with

Connection

 

Main Burners

Orifice

 

 

 

Figure 3

Burner Connections

1.Make sure the regulator valve and hose connections are securely fastened to the burner and the tank.

If your unit was assembled for you, visually check the connection between the burner venturi pipe and orifice. Make sure the burner venturi pipe fits over the orifice.

WARNING: Failure to inspect this connection or follow these instructions could cause a fire or an explosion which can cause death, serious bodily injury, or damage to property.

2.Please refer to diagram for proper installation. (Figure 2)

3.If the burner pipe does not rest flush to the orifice, please contact 1.800.762.1142 for assistance.

Tank/Gas Line Connection

1.Make 2-3 oz. of leak solution by mixing one part liquid dishwashing soap with three parts water.

2.Make sure control knobs are (OFF) position. (Figure 3)

3.LP: Turn LP gas tank valve to “OPEN”. NG: Turn “ON” natural gas main valve.

4.Spoon leak check solution at all “X” locations (Figures 2, 4a and 4b)

a.LP: If any bubbles appear turn LP gas tank valve to “CLOSED”, reconnect and re-test.

NG: If any bubbles appear turn natural gas main valve “OFF”, reconnect and re-test.

b.LP: If you continue to see bubbles after several attempts, turn LP gas tank valve to “CLOSED” and disconnect LP gas tank and contact 1.800.762.1142 for assistance.

NG: If you continue to see bubbles after several attempts, turn natural gas main valve “OFF” and disconnect natural gas line and contact 1.800.762.1142 for assistance.

c.LP: If no bubbles appear after one minute turn LP gas tank valve to “CLOSED”, wipe away solution and proceed.

NG: If no bubbles appear after one minute turn natural gas main valve “OFF”, wipe away solution and proceed.

Figure 4a

X

X

X

X X

Figure 4b

X

X

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