BOSCH NGM8057UC Gas Cooktop Installation Guide

BOSCH NGM8057UC Gas Cooktop

Gas Appliance Safety

WARNING
If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury or death. Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

WHAT TO DO IF YOU SMELL GAS
Do not try to light any appliance. Do not touch any electrical switch. Do not use any phone in your building. Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you cannot reach your gas supplier, call the fire department. Installation and service must be performed by a qualified installer, service agency or the gas supplier.  Never Operate the Top Surface Cooking Section of this Appliance Unattended. – Failure to follow this warning statement could result in fire explosion, or burn hazard that could cause property damage, personal injury, or death. – If a fire should occur, keep away from the appliance and immediately call your fire department. DO NOT ATTEMPT To EXTINGUISH AN OILIGREASE FIRE WITH WATER.

IMPORTANT SAFETY INSTRUCTIONS

IMPORTANT
THE APPLIANCE MUST BE INSTALLED BY A QUALIFIED INSTALLER. INSTALLER: LEAVE THESE INSTRUCTIONS WITH THE APPLIANCE AFTER INSTALLATION IS COMPLETE.  SAVE FOR THE LOCAL INSPECTOR’S USE. OWNER: PLEASE RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE.

WARNING
If the information in this manual is not followed exactly, fire or shock may result causing property damage or personal injury.Do not repair, replace or remove any part of the appliance unless specifically recommended in the manuals. Improper installation, service or maintenance can cause injury or property damage. Refer to this manual for guidance. All other servicing should be done by an authorized service provider. Disconnect electrical and gas supply before servicing.

High Altitude Installation

This appliance has been tested for operation up to an altitude of 10,100 ft (3,078 m) elevation above sea level. If desired, for altitudes above 2,000 ft (610 m) elevation above sea level, adjustments may be made. Burners should be checked at the lowest setting, if the flame is not stable the simmer should be increased until the flame is stable. This can be done by adjusting the bypass screw in the valve. If flame performance is satisfactory, adjustment will not be required. It is required that a Cetified Professional make the high altitude adjustments during installation.

Appliance Handling safety
Hidden surfaces may have sharp edges. Use caution when reaching behind or under appliance.

Safety Codes and Standards
This appliance complies with the following Standard: ANSI 221.1/CSA 1.1 Household Cooking Gas Appliances It is the responsibility of the owner and the installer to determine if additional requirements and/or standards apply to specific installations. Installation must conform with local codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1/NFPA 54 or, in Canada, the Natural Gas and Propane Installation Code, CSAB149.1. The appliance must be electrically grounded in accordance with local codes or, in the absence of local codes, with the National Electrical Code, NFPA 70 latest edition or, in Canada, the Canadian Electric Code, CSA C22.1-02.

Electric Safety

WARNING
Before you plug in an electrical cord or turn on power supply, make sure all controls are in the OFF position. For appliances equipped with a cord and plug, do not Cut or remove the ground prong. It must be plugged into a matching grounding type receptacle to avoid electrical shock. If there is any doubt as to whether the wall receptacle is properly grounded, the customer should have it checked by a qualified electrician. Do not use an extension cord. Do not use an adapter. If required by the National Electrical Code (or Canadian Electrical Code), this appliance must be installed on a separate branch circuit. The circuit breaker should have a contact separation of at least 3 mm on all poles. Be sure your appliance is properly installed and grounded by a qualified technician. Installation, electrical connections and grounding must comply with all applicable codes. Before installing, turn power OFF at the service panel. Lock service panel to prevent power from being turned ON accidentally. Installer show the owner the location of the circuit breaker or fuse. Mark it for easy reference.

Gas Safety
Install a gas shutoff valve near the appliance. It must be easily accessible in an emergency. Leak testing must be conducted by the installer according to the instructions in this manual. The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing at pressures in excess of % psi (3.5 KPa). 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 % psi (3.5 kPa). The minimum supply pressure must be 1″ water column above the manifold pressure printed on the rating label. The maximum supply pressure must not exceed 14.0 inches water column (34.9 Millibars). A metal flex line or fixed metal pipe shall be used to connect gas to the appliance. If a metal gas line cannot be used, consult your local certified electrician or local electric codes for proper grounding. IMPORTANT SAFETY NOTICE: Burning gas cooking fuel generates some by-products which are on the list of substances which are known by the State of California to cause cancer or reproductive harm. To minimize exposure to these substances, always operate this unit according to the instructions contained in this booklet and provide good ventilation.

Proposition 65 Warning
This product may contain a chemical known to the State of California, which can cause cancer or reproductive harm. Therefore, the packaging of your product may bear the following label as required by California. STATE OF CALIFORNIA PROPOSITION 65 WARNING:  Cancer and Reproductive Harm www.P65Warnings.ca.gov

Propane Gas Installation

The propane gas tank must be equipped with its own high pressure regulator. In addition, the regulator Supplied with this unit must also be used. The appliance is shipped from the factory for use with natural gas. It must be converted for use with propane. A qualified technician or certified installer must do the Conversion. For use with propane the appliance must be converted per the LP conversion.

For Massachusetts installations

Installation must be performed by a qualified or licensed contractor, plumber or gas fitter qualified or licensed by the state, province or region where this appliance is being installed. Shut-off valve must be a T handle gas cock. Flexible gas connector must not be longer than 36 inches. Installer – show the owner where the gas shut-off valve is located.

Related Equipment Safety

The appliance should only be used it installed by a qualified technician in accordance with these installation instructions. The manufacturer is not responsible for any damage resulting from incorrect installation. Remove all tape and packaging before using the appliance. Destroy the packaging after unpacking the appliance. Never allow children to play with packaging material. Never modify or alter the construction of the appliance. For example, do not remove leveling legs, panels, wire covers or anti-tip brackets/screws. To eliminate the risk of burns or fire by reaching over heated surface units, cabinet storage space located above the surface units should be avoided. If cabinet storage is to be provided, the risk can be reduced by installing a hood that projects horizontally a minimum of 5 inches (127 mm) beyond the bottom of the cabinet. Verify that cabinets above the cooktop are a maximum of 13(330 mm) deep. When installing a cooktop over a single oven, be sure to follow both the oven’s and cooktop’s installation manuals. You can find a list of approved combinations of cooktop and oven in the Appliance Document List of your cooktop, or you can contact Customer Service for the latest list of approved combinations. Do not try to install your cooktop over any oven that is not stated in that list.

Ventilation Recommendations

We strongly recommend the installation of a ventilation hood above this appliance. The hood must be installed according to instructions furnished with the hood.

CAUTION
The appliance should not be installed with a ventilation system that blows air downward toward the burners. This type of ventilation system may cause ignition and combustion problems with the gas cooking appliance resulting in personal injury or unintended operation.

Before You Begin

Tools and Parts Needed

• Phillips Head Screwdriver
• Precision Flathead Screwdriver
• Tape Measure
• Teflon Tape (Gas Rated)
• Adjustable Wrench or Channel Lock Pliers

Parts Included

• Cooktop
• Mounting Brackets (4)
• Sheet Metal Screws
• DIN7982 4.2×25 (1) (4)
• Burner Grates (3)
• Burners (5)
• Burner Caps (6)
• Optimism Cap (1)
• Pressure Regulator
• LP Gas Conversion Kit

Note
If parts are missing or damaged, call Customer Support or write to the address listed on the inside bad covers.

Appliance Dimensions

General Requirements

• The cabinet in which the cooktop is installed must be properly secured and stable.
• The cabinets next to the cooktop, the laminated covering and glue for adhering it must be made of non-flammable and heat resistant materials.
• This appliance cannot be installed above fridges, washing machines, dishwashers or similar.
• If an oven is installed underneath the cooktop, the thickness specified for the countertop surface may exceed the minimum thickness stated in these instructions.
• Observe the information in the oven installation instructions.

Electrical Requirements

CAUTION
Do not use an extension cord with the gas cooktop. This appliance requires a 60 Hz, 15 Amp, 120 VAC connection. Plan the installation so that the power connection is accessible from the front of the cabinet.

Gas Requirements

The cooktop is shipped from the factory for use with natural gas. For use with LP conversion, a certified technician or installer must do the conversion.

Supply Pressure

• Natural Gas: 7 inches water column (17.4 Millibars)
• Propane Gas: 11 inches water column (27.4 Millibars) The propane gas tank must be equipped with its own high pressure regulator in addition to the pressure regulator supplied with this unit.

Cabinet Requirements

Instructions are based on standard American cabinets 36 high (91 cm) x 24 deep (61 cm) with a 25 (63 cm) countertop. The maximum depth of a cabinet installed above the cooktop is 13 (33 cm).

Note
All measurements given must be precisely followed. If nonstandard cabinets are used, make sure they are installed with minimum dimensions shown. Plan the installation of the unit so that the power cord, gas shut-off valve and gas pressure regulator are accessible from the front of the cabinet.

For installation in a kitchen island, the minimum distance from the cooktop to the edge of the countertop must be at least 4″ (100 mm).

Hook Up

• Plan the installation of the unit so that the power cord, gas shut-off valve and gas pressure regulator are accessible from the front of the cabinet.
• The supply line must not interfere with the back of the unit.
• Make sure the gas supply is turned off at the manual shut-off valve before connecting to the appliance.

Countertop Requirements

WARNING
To reduce the risk of ignition of surrounding combustible materials, install at least 12¾ 325 mm from both sidewalls and at least 2¼ (58 mm) from the rear wall. The countertop must be level and horizontal. The stability of the countertop must be maintained after the cut-out has been made.

Note
All measurements given must be precisely followed. If nonstandard cabinets are used, make sure they are installed with minimum dimensions shown in the following image.

For installation in a kitchen island

Ventilation Requirements

We strongly recommend the installation of ventilation with the appliance. The appliance must be installed according to the ventilation instructions.

CAUTION
The appliance should not be installed with a ventilation system that blows air downward toward the burners. This type of ventilation system may cause ignition and combustion problems with the gas cooking appliance resulting in personal injury or unintended operation.

When installed in combination with a hood, refer to hood manufacturer’s requirements for installation.

Installation Procedure

Prepare Installation Space

Create the cut-out in the countertop according to the installation drawings. The angle of the cut surface to the countertop must be 90°. After creating the cut-out, remove shavings. Seal cut surfaces in a heat-resistant manner. Some solid surface countertops require special installations. For example, heat reflective tape and rounded corners may be necessary. Contact the countertop manufacturer for instructions specific to your countertop.

WARNING
To avoid electrical shock hazard, before installing the cooktop, switch power off at the service panel to prevent the power from being switched on accidentally. Cut out the countertop per the dimensions  If there is no oven beneath the cooktop, install a non-combustible floor with a 3/8″ (10 mm) space between the floor and the bottom of the cooktop. The distance from the intermediate floor to the power supply connection for the appliance must be at least 3/8 (10 mm).

Install the Cooktop

WARNING
Before you plug in an electrical cord or turn on power supply, make sure all controls are in the OFF position.

CAUTION
Sharp edges. Use protective gloves when installing the cooktop.

IMPORTANT
A foam tape seal is factory installed on the underside of the cooktop to prevent leaks. Do not remove the seal under any circumstances. 1. Screw each one of the clips into the position shown in the following image, so that they are free to rotate.

Turn the mounting brackets and tighten them fully. The orientation of the mounting brackets depends on how thick the countertop surface is. For countertops between 2 (50 mm) and 2¾ (70 mm) thick, insert a wooden block between the end of the adjusting screw and the bottom of the countertop.

Note
Do not overtighten adjusting screw.

• A Cooktop
• B Countertop
• C Wooden block Required for installation in countertops that are between 2 (50 mm) and 2¾ (70 mm) thick.
• D Long adjusting screw Required for installation with wooden block available for purchase from Customer Service (order no. 10011930).

NOTICE
Do not use silicone to glue the cooktop to the countertop surface.

Connect Gas Supply

Side View Gas Cooktop Installation

Arrow on the back of the pressure regulator shows the direction of gas flow.

Gas and Electrical Location

• A Cooktop Rough-in Box
• B Arrow on Pressure Regulator
• C Pressure Regulator
• D 1/2 Female Pipe Threads
• E Flexible Gas Line
• G Power Cord (40/1 m)
• H 120 Volt Receptacle
• J Gas Cut-off Valve
• K Gas Supply Line Stub-out
• L Floor

Installing the Pressure Regulator

WARNING
Do not attempt any adjustment of the pressure regulator, except when converting to propane. Adjustments could lead to leaks or cause incorrect gas pressure to the appliance. Install the pressure regulator supplied with unit) to manifold pipe using Teflon tape on threads of manifold pipe. Turn to hand tighten plus 1/4 turn, not exceeding 1 turn for alignment.  To prevent possible damage to the gas pressure regulator, install it after the cooktop is in its permanent position. When the regulator is securely installed on the manifold pipe, the conversion nut will be easily accessible. For tight installations a suitable kit is available from Customer Service order no. 00611084

• A Appliance Manifold Connection
• B Conversion Nut
• C Pressure Regulator

Connecting the Gas Supply Line

Connect the gas supply line to the unit pressure regulator using a ½ metal flex gas line or fixed metal pipe connection between manual shut-off valve and pressure regulator. Always install a new gas connection.

Checking Gas Line for Leaks

Check supply line connections for leaks using a soap solution or non-corrosive leak detection fluid. Do not use a flame of any sort.

1. Turn on gas.
2. Apply a soap solution or non-corrosive leak detection fluid to all joints and fittings in the gas connection between the shut-off valve and the cooktop.
3. Include gas fittings and joints in the cooktop if connections may have been disturbed during installation.
4. Bubbles appearing around fittings and connections indicate a leak.
5. If a leak appears, turn off supply line gas shut-off valve and tighten connections.
6. Retest for leaks by turning on the supply line gas shutoff valve.
7. When leak check is complete (no bubbles appear), test is complete.
8. Wipe off all soap solution or detection fluid residue.

Important Notes for Gas Connection

The appliance and its individual gas shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at testpressures in excess of 1/2 psi (3.5kPa).  The appliance must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psi (3.5kPa).

Connect Electrical Supply

Before connecting the 40 (1 m) supply cord to a wall receptacle, make certain that gas shut-off valve and all burner controls are in OFF position.

Burner Cap and Burner Base Placement

The burner parts must be properly placed for the cooktop to function properly. If the burner parts are not properly placed, one or more of the following may occur:

• Burner flames are too high.
• Flames shoot out of burners.
• Burners do not ignite.
• Burner flames light unevenly.
• Burner emits gas odor.

Placing Burner Parts

After electrical connection is complete, assemble the burner parts correctly and evenly. When assembling the burner parts, make sure that the burner head is placed on the base in such a way that the prongs of the burner cap fit snugly into the groove of the burner base

Parts

1. Igniter
2. Thermocouple
3. Burner base
4. Burner cap

Checking Burner Cap Placement

Check to make sure that there is no gap between the burner parts. You may gently try to move the burner parts from side to side to check if they are properly placed.

Install Burner Grates

Properly position and install each burner grate as shown in the illustration below.

WARNING
To prevent flare-ups, properly support pots and avoid spills, all grates must be properly positioned on the cooktop whenever the cooktop is in use. Each of the four feet must be placed into the corresponding dimples in the cooktop. Do not use a grate if the rubber feet are missing or damaged.

Check the Installation

Place each correct sized burner cap in its seated, notched position and check the operation of the electric igniters. Check flame characteristics. Flame should be blue with a minimal yellow tip on the outer cone of the
flames.

Checking Flame Characteristics

Yellow Flames
Further adjustment is required

Yellow Tips on Outer Cones
Normal for LP Gas

Soft Blue Flames
Normal for Natural Gas

Note
If the flame is completely or mostly yellow, verify that the regulator is set for the correct fuel. After adjustment, retest. Some yellow streaking is normal during the initial startup. Allow unit to operate 4-5 minutes and re- evaluate before making adjustments.

Conversion to LP Gas

The components required for this are contained in the conversion kit included with this appliance, or are available from Customer Service.

Important
After finishing, attach the sticker indicating the new gas type close to the rating label if you change to LP Gas, or remove the sticker if you are changing back to Natural Gas.

Converting the Pressure Regulator

Locate the pressure regulator on the bottom right end of the cooktop.

Note
The arrow on the back of the regulator must point in the direction of the gas flow to the cooktop.

Remove the hexagon shaped cap from the regulator making sure not to dislodge the gasket on the cap or the spring inside the regulator. Grasp the plastic button stem firmly and pull it forcefully from the metal cap. The stem snaps snugly into an indent in the cap and may require a strong pull to remove. (Hint: it may be helpful to gently rock the plastic stem while pulling it from the metal cap.

• A Spring
• B Plastic button stem
• C Gasket

After removing the stem from the cap, rotate the stem 180° so the button end of the stem is away from the cap and the letters “LP” on the stem are upside down when the cap is set flat on its head. Snap the stem back in place in this position inserting it into the indent in the metal cap. The stem should snap into place.

Important
Attach the metallic sticker included with this conversion kit) to the bottom of the appliance as shown, placing it near the appliance rating label (shows model number and information about the appliance). This sticker provides notice that the appliance has been converted for use with LP gas.

Replacing the Nozzles

Replacing the nozzles

1. Remove all burner grates, burner caps and burner bases.
2. To replace the nozzles, use a 7 mm socket wrench.
3. It is important to make sure that the nozzles do not become detached during removal or fastening.
4. They must be properly tightened to ensure that there are no leaks.
5. With these burners, there is no need to adjust the primary air.

Fasten the nozzles and attach the burner caps to the corresponding burners. Put the burner grates in place on the corresponding burners.  Attach the sticker indicating the new gas type close to the rating label. Save the nozzles removed from the appliance for future use. If you change the type of gas back to Natural Gas at a later point, remove the sticker.

Adjusting the Gas Valves

1. Turn the control knobs to the lowest setting.
2. Remove the control knobs from the gas valves and remove the white ring that is underneath.
3. A flexible black rubber sealing ring will be visible.
4. Below the left upper position of that seal, there is a visible black Star T10 screw, partly hidden by the seal.
5. Press the rubber seal aside a bit to meet the screw with a long thin T10 screwdriver.
6. The dual flame
7. burner has 2 setting screws.
8. Never remove the sealing ring. Sealing rings prevent liquids and dirt from finding their way into the appliance and impairing its ability to function properly.

See the following chart for the setting of the gas valve’s setting screws (M)

• A: LP Gas- The gas valve’s setting screws must be tightened properly.
• B: Natural Gas- The gas valve’s setting screws must finish flush with the fitting.
• Make sure the flame does not go out and there are no flashbacks when you turn the control knob between the highest and lowest setting.
• Never remove the valve stem.
• In the event of damage, the gas valve must be completely replaced

Customer Service
Contact Customer Service if your appliance needs repair  Our Customer Service will be happy to provide you with information about an authorized servicer near you.

Model (E) number and FD number
When you contact Customer Service, please have the Model (E) number and the FD number for your appliance available. You can find this information on the rating label:  in the Appliance Document List on the underside of the appliance.

www.bosch-home.com

References

• Home Appliances Global Website | Bosch

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