WARING COMMERCIAL WMO90 9 Cu. Ft. Medium-Duty Microwave Oven Instruction Manual

WARING COMMERCIAL WMO90 9 Cu. Ft. Medium-Duty Microwave Oven

IMPORTANT SAFETY INSTRUCTIONS

1. READ ALL INSTRUCTIONS BEFORE USING.

2. Read and specifically follow: PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY found on page

3. As with most cooking appliances, close supervision is necessary to reduce the risk of fire in the oven cavity.
   WARNING: To reduce the risk of burns, electric shock, fire, injury to persons or exposure to excessive microwave oven energy when using your appliance, follow basic safety precautions, including the following:

4. Use this appliance only for its intended use as described inthis manual. Do not use corrosive chemicals or vapors in this appliance. This oven is specifically designed to heat, cook or dry food. It is not designed for industrial or laboratory use

5. Do not operate this oven if it has a damaged cord or plug, ifit is not working properly, or if it has been damaged or dropped.

WARNING: Liquids such as water, coffee or tea may be overheated beyond the boiling point without appearing to be boiling. Visible bubbling or boiling is not always present when the container is removed from the microwave oven. THIS COULD RESULT IN VERY HOT LIQUIDS SUDDENLY BOILING OVER WHEN THE CONTAINER IS DISTURBED, OR WHEN A SPOON OR OTHER UTENSIL IS INSERTED INTO THE LIQUID.

1. Do not overheat the liquid.
2. Stir the liquid both before and halfway through heating it.
3. Do not use straight-sided containers with narrow necks.
4. After heating, allow the container to stand in the microwave oven for a short time before removing it.
5. Use extreme care when inserting a spoon or other utensil into the heated container.

WARNING: DO NOT run this unit without food.
SAVE THESE INSTRUCTIONS APPROVED FOR COMMERCIAL USE

GROUNDING INSTRUCTIONS

DANGER – Electric Shock Hazard
Touching some of the internal components can cause serious personal injury or death. Do not disassemble this appliance. Improper use of the grounding can result in electric shock. Do not plug into an outlet until appliance is properly installed and grounded. This appliance must be grounded while in use to protect the operator from electric shock. The appliance is equipped with a 3-foot-long conductor cord and a 3-prong grounding plug to fit into the proper outlet. In the event of an electrical short circuit, grounding reduces the risk of electric shock by providing an escape wire for the electric current. This appliance has a cord with a grounding wire and a grounding plug, which must be plugged into a properly installed and grounded outlet. The WMO90 plug (Fig. 1) can be connected to an adapter (Fig. 2) for use in 2-prong receptacles. The grounding lug, which extends from the adapter, must be connected to a permanent ground, such as a properly grounded outlet box (Fig. 3) using a metal screw.

Consult a qualified electrician or serviceman if the grounding instructions are not completely understood or if there is doubt as to whether the appliance is properly grounded.

EXTENSION CORDS & LONG CORD SETS
Use only 3-wire extension cords that have 3-prong grounding-type plugs and 3-pole cord connectors that accept the plug from the appliance. Use only extension cords that are intended for indoor use. Use only extension cords having an electrical rating not less than the rating of the appliance. Do not use damaged extension cords. Examine the extension cord before using and replace if damaged. Do not abuse the extension cord and do not yank on any cord to disconnect. Keep cord away from heat and sharp edges.
NOTE: The WMO90 is for 120V only. This appliance should not be used with a converter.

PRECAUTIONS TO AVOID POSSIBLE EXPOSURE TO EXCESSIVE MICROWAVE ENERGY

CAUTION
Personal Injury Hazard
Tightly closed containers could explode during microwaving. Closed containers should be opened and plastic pouches should be pierced before cooking.

SAFE MATERIALS FOR MICROWAVE

There may be certain non-metallic utensils and containers that are not safe to use for microwaving. Refer to the instructions on Materials You Can Use In Microwave Oven and Materials To Be Avoided In Microwave Oven on pages 8 and page 9. To check if a material is microwave safe, you can test it following the procedure below.

1. Fill a microwave-safe container with 1 cup (250ml) of cold water along with the utensil in question.
2. Cook on maximum power for 1 minute.
3. Carefully feel the utensil. If the utensil is warm, do not use it for microwave cooking.
4. Do not exceed 1 minute of cooking time.

MATERIALS YOU CAN USE IN MICROWAVE OVEN

Material| Remarks
Dinnerware| Microwave-safe only. Follow manufacturer’s instructions. Do not use cracked or chipped dishes.
Glass jars| Always remove lid. Use only to heat food until just warm. Most glass jars are not heat resistant and may break.
Glassware| Heat-resistant oven glassware only. Make sure there is no metallic trim. Do not use cracked or chipped glassware.
Oven cooking bags| Follow manufacturer’s instructions. Do not close with metal tie. Make slits to allow steam to escape.
Paper plates and cups| Use for short–term cooking/warming only. Do not leave oven unattended while cooking.
Paper towels| Use to cover food for reheating and absorbing fat. Use with supervision for short-term cooking only.
Parchment paper| Use as a cover to prevent splattering or a wrap for steaming.

Plastic| Microwave-safe only. Follow the manufacturer’s instructions. Should be labeled as microwave safe. Some plastic containers soften, as the food inside gets hot. Boiling bags and tightly closed plastic bags should be slit, pierced or vented as directed on package.
Plastic wrap| Microwave-safe only. Use to cover food during cooking to retain moisture. Do not allow plastic wrap to touch food.
Thermometers| Microwave-safe only (meat and candy thermometers).
Wax paper| Use as a cover to prevent splattering and retain moisture.
MATERIALS TO BE AVOIDED IN MICROWAVE OVEN
Aluminum tray| May cause sparking. Transfer food into a microwave-safe dish.
Food carton with metal handle| May cause sparking. Transfer food into a microwave-safe dish.
Metal or

metal-trimmed utensils

| Metal shields the food from microwave energy. Metal trim may cause sparking.
Metal twist ties| May cause sparking and could cause a fire in the oven.
Paper bags| May cause a fire in the oven.
Styrofoam®| Styrofoam® may melt or contaminate the liquid inside when exposed to high temperatures.
Wood| Wood will dry out when used in the microwave oven and may split or crack.

COUNTERTOP INSTALLATION

Remove all packing material and accessories. Examine the oven for any damage such as dents or a broken door. Do not install if the oven is damaged.
Cabinet: Remove any protective film found on the microwave oven cabinet surface.

INSTALLATION
Select a level surface that provides enough open space for the intake and/or outlet vents.

WARNING: Do not install oven over a range cooktop or other heat-producing appliances. If installed near or over a heat source, the oven could be damaged and the warranty would be void.

SETTING UP YOUR OVEN

Remove the oven and all materials from the carton and inside the oven cavity. Your oven comes with an Instruction Manual. Please keep it for reference .

• Control Panel
• Observation Window
• Door Assembly
• Safety Interlock System
• Ceramic Surface

CONTROL PANEL

1. Power Keys
2. Time Entry Key
3. X2 Key
4. Stop/Reset Key
5. Start Key
6. Number Keys
7. LED Display Screen

SPECIFICATIONS

Model| WMO90
Rated Voltage:| 120V ~ 60Hz
Rated Input Power (Microwave):| 1550W
Rated Output Power (Microwave):| 1000W
Oven Capacity:| .9 cu. ft.
External Dimensions:| 20.1 x 17 x 12.2 inches
Net Weight:| Approx. 32.0 lbs.

OPERATION INSTRUCTION

Five power levels are available.

Appendix A. User Options
Items bolded below are the default values.

Appendix B. Default Cook Times
The oven comes programmed with the following Preset Cook Times unless otherwise noted in the Product Specifications.

POWER UP

The display — — shows when the oven is powered ON for the first time. If the STOP button is pressed, the oven will change to Idle Mode.
Note: While in Idle Mode, no buttons can be pressed.

IDLE MODE

1. The oven enters Idle Mode after a number of seconds have expired in Ready Mode without a keyboard button being pressed or a door being opened and closed. The number of seconds in Ready Mode is set by User Option 4 and is displayed in the window.
2. During Idle Mode, LED is blank.
3. By opening and then closing the oven door, the oven will exit Idle Mode and enter Ready Mode.

READY MODE

1. I n this mode, the oven is ready to either begin a Manual or Preset Program Cook Mode.
2. Opening and closing the door while the oven is in Idle Mode will put the oven into Ready Mode.
3. During Ready Mode, 0:00 is displayed.
4. From Ready Mode, the oven can go into almost all of the other modes.

DOOR OPEN MODE

1. While the door of the oven is open, the oven is in Door Open Mode. This also allows for entry into Programming Mode.
2. Display is blank, but the fan and oven lamp are on.
3. I f User Option OP:60 is selected and the door is opened during operation, the oven will enter Pause Mode. Closing the door will allow the Manual or Preset Program currently running to continue.
4. I f User Option OP:61 is selected, opening and closing the door during operation will reset the oven and clear out any information about the Manual or Preset Program currently running.

PAUSE MODE

1. This mode allows the user to temporarily stop the cooking cycle to inspect or stir food.
2. While in Manual Cook Mode, or Preset Program Cook Mode, if the door is opened then closed, or if STOP is pressed, the oven will enter Pause Mode.
3. While paused, LED will display the remaining cooking time.
4. Pause Mode reverts to Idle Mode in the same way as Ready Mode, depending on User Option 4. Additionally, if STOP
   is pressed, the oven will immediately enter Ready Mode. If START is pressed, the oven will go into Working Mode.

MANUAL COOK ENTRY MODE

1. The user manually enters the cooking time and power level while in this mode.
2. While the oven is in Ready Mode, press the TIME ENTRY pad on the keyboard to enter Manual Cook Entry Mode.
3. I n this mode, 00:00 is displayed. Press a number key to set timer before choosing power level.
4. I f you press HOLD 0%, Defrost 20%, Medium 50% or Med-Hi 70% to choose a power level, the LED will display your selection. If the same button is pressed twice, the power will change to PL10, which is 100%. If no power is chosen, PL10 is the default.
5. Press START to enter Manual Cook Mode. Press STOP to enter Ready Mode.

MANUAL COOK MODE

1. I n this mode, food is cooked. While in Manual Cook Entry Mode, pressing START begins the Manual Cook Mode.
2. The LED displays the remaining cooking time. The fan and oven lamp will turn on.
3. When the cooking program is finished, the oven enters End of Cook Cycle Mode. If you press STOP in this mode, the oven enters Pause Mode.

END OF COOK CYCLE MODE

1. After the time has expired in the Manual Cook Mode, or the Preset Program Cook Mode, the oven enters the End of Cook Cycle Mode.
2. During this mode, End is displayed.
3. I f either User Option OP:11 or OP:12 is selected, the oven continues to sound until the user either opens and closes the door or presses STOP. If User Option OP:10 is selected, after the 3 beeps, the oven will display “End”. For a period of time without any key operation, the oven will automatically enter the Idle Mode.

PRESET PROGRAM COOK MODE

1. This mode cooks food using one touchpad operation. While in Ready Mode, pressing one of 10 digital keys on the keyboard will cause the oven to run the Preset Program associated with that key.
2. The LED displays the remaining cooking time. With multi-stage cooking, the total remaining cooking time is displayed, and not the cooking time for any particular stage.
3. I f the program chosen exceeds the maximum time allowed by User Option 7, the oven will rapidly beep three times and display ProG to indicate that the program is unacceptable.
4. When the cooking program is finished, the oven will enter End of Cook Cycle Mode. If you press STOP in this mode, the oven will enter Pause Mode.

ON-THE-FLY COOKING MODE
If User Option OP:51 is selected, this will allow the user to add time while cooking.

1. Press the desired number key during cooking to add time. The longer cooking cycle will begin automatically.
2. The screen displays the new remaining cooking time. When the cooking program is finished, the oven enters End of Cook Cycle Mode.
3. To stop cooking before the end of the cooking cycle, press STOP. The oven will enter Pause Mode.

PROGRAMMING MODE
This mode allows the user to assign cook times and power levels using a one- touch button.

1. Open the door and press number button 1 for five seconds. The buzzer will sound once and the oven enters Programming Mode.

2. ProG is displayed.

3. Press any number button, 0 to 9, and the LED will display the saved time. You can then input the time you need.

4. Press HOLD 0%, Defrost 20%, Medium 50% or Med-Hi 70%to input the power level. The LED will display the related power. If the same button is pressed twice, the power will change to PL10, which is the 100% power level. If no power is chosen, PL10 is the default.

5. To change the cooking factor: If you press X2, the LED
   will display CF:XX. The default cooking factor is 80%, and CF:80 is displayed. If you need to change the cooking factor, just press one of the numbered buttons (1 for 10%, 2 for 20%, etc.).

6. After setting the time and power, press START, and the cooking program will be saved. Once the program is saved, ProG is displayed.

7. I f total cooking time exceeds the MAX time, use User Option

8. Press START to save the program. The buzzer will sound three times to indicate the oven is not in use. LED will display ProG. The previous time set will remain in place.

9. Close the door to return oven to Ready Mode. If STOP is pressed during the programming process, the oven will enter Door Open Mode, and any program not saved will be lost. If there is program saved as memory procedure, press the related number button to start the programmed operation. If nothing has been saved, the buzzer will sound and the oven will not operate.

Example:
Program: Power level PL7, cooking time 1 minute and 25 seconds.

• Step 1: In the waiting stage, press number button 1 for  5 seconds. ProG is displayed.
• Step 2: Press number 3. The program will be saved in 3.
• Step 3: Press numbers 1, 2 and 5 to program the cooking time.
• Step 4: Press Med-Hi 70% button. PL7 is displayed.
• Step 5: Press START to save. When using the program next

DOUBLE QUANTITY COOKING

Allows the user to double the set cooking time of a particular food item.

1. I n the Ready mode, press the X2 key before or after pressing the desired preprogrammed key. LED displays doub.
2. I f you wish to change the Cooking Factor, see Programming Mode.
3. The oven will begin to cook.
4. At the end of the cooking program, the oven will enter End of Cook Cycle Mode.

TO PROGRAM MULTI-STAGE COOKING
Users can cook food items with different combinations of time and power levels. Up to three stages can be set in Cooking Mode or Memory Mode.

1. Once power level and time are set for the first stage: Pressing TIME ENTRY (S-2 is displayed) lets you program the power level and time for stage two.
2. Pressing TIME ENTRY again (S-3 is displayed) lets you program a third power level and time combination.
3. Press START to start cooking.

Example: STAGE ONE

• Press number button 1 for five seconds. LED displays ProG.
• Press number button 3 to save the program in 3.
• Enter desired cook time.
• Press Med-Hi 70%. Display shows PL7.

The first stage is finished. STAGE TWO

• Press TIME ENTRY. The display shows S-2.

• Enter desired cook time.

• Press Medium 50%. The display shows PL5.
  The second stage is finished.

• Press START to save the two-stage program, or press TIME ENTRY once more to program a third stage.

USER OPTION MODE

This allows the user to choose between various ways for the oven to operate.

1. Open the oven door and press number button 2 for five seconds. The buzzer sounds once and this mode is entered.
2. LED displays OP: – -.
3. Press any number button to enter the related mode setting. For example: To set the buzzer to a medium level, press
4. The display shows OP:22. To change, keep pressing 2. LED displays cycles through OP:20, OP:21, OP:22, OP:23, before cycling back to OP:20.
5. Press START to save the displayed setting. OP: – – will be displayed again.
6. During this process, press STOP to enter Door Open Mode. Closing the door will return oven to Ready Mode.
7. I f START button is not pressed as the last step, the program will not be saved.

SERVICE MODE

1. Open the oven door and press and hold the number button 3 for five seconds to enter Service Mode.
2. LED displays SErU.
3. To check the times of closing or opening the door, just press 3. LED will display the times.
4. To reset: Press and hold both START and the number button
5. In seconds, the message will be cancelled and 4-CL will be displayed.
6. Press STOP to enter Door Open Mode. Close the door to enter Ready Mode.

INQUIRY FUNCTION

While cooking, press TIME ENTRY to check the power level. The LED will display the power level for 3 seconds. This feature is available for multi-stage cooking.

FACTORY-DEFAULT SETTING

Press START and 0. Then press START to return to factory-default settings.

CLEANING INSTRUCTIONS
Always keep the oven clean.

1. Cleaning the glass viewing window, the inner door panel and oven front face: For best performance and to maintain a high degree of safety, the inner door panel and oven front face should be free of food or grease buildup. Wipe these parts with a mild detergent, rinse and wipe dry. Never use abrasive powders or pads.
2. Cleaning the control panel and plastic parts: Do not apply a detergent or an alkaline liquid spray to the control panel and plastic parts, as this may cause damage to these parts. Use a dry cloth (not a soaked cloth) to clean these parts.
3. Cleaning the oven interior: After use, be sure to clean up spilled liquids, spattered oil and food debris as quickly as possible. If the oven is used when dirty, efficiency drops and the dirt gets stuck on the oven surface and may cause bad odors. Clean the interior with a cloth soaked in lukewarm water with a mild detergent dissolved in it, then rinse the soap off with a damp cloth.

CAUTION: Do not wipe plastic and painted sections of the oven with bleach, thinners or other cleaning agents, as this may cause these parts to dissolve or change shape.

MAINTENANCE

Reference the chart below for any operating issues and try the solutions provided. If the microwave oven still does not work properly, contact the nearest authorized service center.

b.   Door is open.

c. the Wrong operation is set.

| a.   Plug into the outlet.

b.   Close the door and try again.

c.   Check instructions.

microwave oven were used.

b.   The oven is operating when empty.

c.   Spilled food remains in the cavity.

| a.   Use microwave-safe cookware only.

b.   Do not operate with oven empty.

c.   Clean cavity with a wet cloth.

Unevenly cooked foods| a.   Materials to be avoided in

microwave oven were used.

b.   Food is not defrosted completely.

c.   Cooking time, and power level is not suitable.

d.   Food is not turned or stirred.

| a.   Use microwave-safe cookware only.

b.   Completely defrost food.

c.   Use correct cooking time, and power level.

d.   Turn or stir food.

Overcooked foods| Cooking time, power level is not suitable.| Use correct cooking time, power level.
Undercooked foods| a.   Materials to be avoided in

microwave oven were used.

b.   Food is not defrosted completely.

c.   Oven ventilation ports are restricted.

d.   Cooking time, and power level is not suitable.

| a.   Use microwave-safe cookware only.

b.   Completely defrost food.

c.   Check to see that oven ventilation ports are not restricted.

d.   Use the correct cooking time, and power level.

Improper defrosting| a.   Materials to be avoided in

microwave oven were used.

b.   Cooking time, and power level is not suitable.

c.   Food is not turned or stirred.

| a.   Use microwave-safe cookware only.

b.   Use the correct cooking time, and power level.

c.   Turn or stir food.

References

• Waring® Commercial

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