Panasonic NE1757R, NE2157R, NE1258R Power Source Voltage Adjustment, How Does The Microwave Work?

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Power Source Voltage Adjustment

The microwave oven Models NE-1757 and NE-2157 are factory set for 208 V operation. For 230 V - 240 V operation, the following adjustment MUST be made.

(Step 1) Make sure that the power cord is unplugged before removing the voltage adjustment panel cover.

(Step 2) Unscrew the voltage adjustment panel cover which is located on the back of the oven. Do not remove any other parts from the oven.

(Step 3) Remove the white connector and plug the black connector into the socket.

(Step 4) Store the unused white connector in the rectangular opening.

(Step 5) Reattach the voltage adjustment panel cover to the cabinet.

For 230 V - 240 V – Use black connector plug.

For 208 V – Use white connector plug.

To go from 230 V - 240 V to 208 V circuit follow steps

1-5 above, except at step 3, plug the white connector plug into the socket and store the black plug in the rectangular opening.

VOLTAGE ADJUSTMENT

CONNECTOR

VOLTAGE

ADJUSTMENT

PANEL

COVER

SCREW

How Does The Microwave Work?

Microwaves are a form of high frequency radio waves similar to those used by a radio including AM, FM, and CB. They are, however, much shorter than radio waves; approximately five inches long. Electricity is converted into microwave energy by the magnetron tube. From the magnetron tube, microwave energy is transmitted to the oven cavity where it is: reflected, transmitted and absorbed.

Reflection

Microwave are reflected by metal just as a ball is bounced off a wall. A combination of stationary (interior walls) and rotating antenna, located underneath the bottom shelf and above the ceiling cover assure that the microwaves are well distributed within the oven cavity to produce even heating or cooking of foods.

Transmission

Microwave pass through some materials such as paper, glass and plastic much like sunlight shining through a window. Because these substances do not absorb or reflect the microwave energy, they are ideal materials for microwave oven heating containers when covered.

Absorption

During heating, microwaves will be absorbed by food. They penetrate to a depth of about 3⁄4 to 11⁄2 inches. Microwave energy excites the molecules in the food (especially water, fat and sugar molecules), and causes them to vibrate at a rate of 2,450,000,000 times per second. This vibration causes friction, and heat is produced just as you will feel heat produced if you vigorously rub your hands together. The internal heating of larger foods is done by conduction. The heat which is produced by friction is conducted to the center of the food. Foods also continue to heat by conduction during standing time. (“carry-over” cooking)

Because microwave dissipate, much like sunlight as it reaches the Earth’s surface, they are not stored in food.

Radio Inference

1.Operation of the microwave oven may cause interference to your radio, TV or similar equipment.

2.When there is interference, it may be reduced or eliminated by taking the following measures:

a.Clean door and sealing surfaces of the oven. (See Care of Your Microwave Oven found on page 16.)

b.Place the radio, TV, etc. away from the microwave oven as far as possible.

c.Use a properly installed antenna, to obtain stronger signal reception.

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Contents Operating Instructions Contents Important Safety Instructions Placement of the Oven Installation and Grounding InstructionsWiring Requirements Grounding InstructionsHow Does The Microwave Work? Power Source Voltage AdjustmentThis oven is preset at the factory as follows Outline DiagramPress Power Level Selector pad once How to OperateOpen the door and put the food in the oven Press Number/Memory pads 2, 0Special Note For both single and 2 stage heating Press Number/Memory pads 1, 0Press the desired Number/Memory pad Programmed HeatingKeep the door closed \Digital Display Window must be blank Press Program padFollow steps 1 to 5 above Press Number/Memory pad\The set heating time will appear Press Prog padProgram Lock Programming Double or Triple Quantity PADBeep Tone While pressing Stop/Reset pad, press Prog pad until ProgOpen the door and leave it open Press Prog pad Press Number/Memory pad 0 onceProgram List While pressing Stop/Reset pad, press Start padCycle Counter Follow -4 on page 12. do not Close the DoorAIR Filter While pressing Stop/Reset pad, press Number/Memory padInstallation Installation Instructions for StackingSanitary Counter Top Seal PreparationReplacement of the cavity light bulb Cleaning of the splatter shieldCleaning the Air Filter Care of Your OvenCode Problem What to do Self Diagnostics Failure Code ExplanationTable of Contents Heating and Defrosting Time ChartsGeneral guidelines for heating in a national microwave oven Microwave basicsQuantity Instructions for AppetizerSBaked goods and dessertS Breakfast Refrigerate, covered Single layer. Cover French toast Fish/Seafood-Primary Cooking Fish and seafoodDefrost Gravies Gravies, sauces and soupsSauces Quantity Instructions for Soups Quantity Instructions forMeat and poultry can be reheated successfully in this oven Plated meat and poultry entreesRice and pasta Microwave Heating Setting NE-1757 NE-2157 NE-1258Rice NE-1257Sandwiches Vegetables, Frozen-Defrosting and Heating VegetablesVegetable, Fresh-Primary Cooking Quantity Instructions for Vegetable, Fresh-Heating Quantity Instructions forCasseroles, Frozen-Heating Preparation CasserolesNE-1257/NE-1258 NE-1757 NE-2157 Technical SpecificationsA00033964AP F0900-3108
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NE1257R, NE1258R, NE1757R, NE2157R specifications

Panasonic has long been a trusted name in the realm of commercial microwaves, and their models NE1258R, NE1757R, NE2157R, and NE1257R are outstanding examples of innovation, efficiency, and reliability. These microwaves are designed for heavy commercial use, suitable for restaurants, cafes, and convenience stores, where speed and consistency are essential.

The Panasonic NE1258R is equipped with a powerful 1000 watts of cooking power. Its compact size makes it ideal for kitchens with limited space, while its easy-to-use control panel ensures quick operation. One of its standout features is the patented inverter technology, which allows for consistent heating and cooking throughout, minimizing the risk of hot or cold spots in food. This technology enhances the overall quality of food being prepared, making it a favorite among chefs who prioritize precision.

Moving up in size and power, the NE1757R and NE2157R models boast 1750 watts and 2100 watts, respectively. This additional power allows for faster cooking times, ideal for busy environments that demand efficiency. Both models also feature extensive auto-cook programs, facilitating a wide variety of menu options with just the press of a button. The user-friendly interface paired with digital display makes cooking straightforward and reduces the potential for errors.

Another common feature among these models is their robust safety design. For instance, all four models come equipped with a safety interlock system, ensuring that the microwave can only operate when the door is securely closed. Furthermore, a cool-touch door and exterior minimize the risk of burns, making these units safe for staff in a bustling kitchen.

Durability is also a key characteristic. Each model is constructed from high-quality stainless steel, which not only provides a sleek appearance but also resists corrosion and is easy to clean. This design consideration is especially crucial in commercial settings where hygiene and maintenance are paramount.

In conclusion, Panasonic’s NE1258R, NE1757R, NE2157R, and NE1257R models represent a blend of technological advancement and user-centric design. Their high power, inverter technology, robust safety features, and durable construction make them ideal choices for any commercial kitchen looking to enhance efficiency and food quality. These microwaves stand out as powerful tools in the culinary industry, helping operators meet the fast-paced demands of modern food service.
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