CROWN EL-20 (01) PDF Document

Before installing and operating the CROWN EL-20, ensure everyone involved is fully trained and aware of precautions. Accidents and problems can be caused by failure to follow fundamental rules and precautions.

FOR YOUR SAFETY: Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.

Improper installation, operation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing, operating or servicing this equipment.

NOTICE:

• This product is intended for commercial use only. NOT FOR HOUSEHOLD USE.

• This manual should be retained for future reference.

PURCHASER:

• Do not attempt to operate this unit in the event of a power failure.

• Keep the appliance area free and clear from combustibles.

• DO NOT obstruct the flow of combustion and ventilation air.

• Adequate clearances MUST be maintained for servicing and proper operation.

The following tables provide the dimensions, electrical characteristics, and general specifications for the CROWN EL-20 kettle.

Dimensions

Electrical Characteristics

General Specifications

UNPACKING:

Immediately after unpacking the kettle, check for possible shipping damage. If the kettle is found to be damaged, save the packaging material and contact the carrier within 15 days of delivery. Prior to installation, verify that the electrical service agrees with the specifications on the rating plate located on the left side panel. If they do not agree, contact your dealer immediately.

INSTALLATION INSTRUCTIONS:

1. The kettle must be installed in accordance with:

1. State and/or local codes.

2. In the USA, the National Electrical Code, ANSI/NFPA-70 (latest edition). In Canada, the Canadian Electrical Code, Part 1, CSA Standard C22.1 (latest edition).

2. Set the kettle in the installation location.

3. With the kettle in position, place a carpenter’s level on top of the kettle and turn the adjustable feet to level kettle side-to-side and front to back.

4. Mark hole locations on floor through anchoring holes provided in flanged adjustable feet.

5. Remove kettle and drill holes in locations marked on the floor. Insert proper anchoring devices to accommodate 5/16″ size lag bolts (not supplied).

6. Reposition kettle. Re-level kettle by making necessary adjustments on flanged feet.

7. Bolt down kettle and seal with Silastic or other equivalent sealing compound. Sealant must be applied not only to bolt heads but also around flanges making contact with the floor surface to fulfill NSF requirements. Wipe off excess sealant immediately.

A Control Box with a power supply equivalent to the electrical rating of the kettle should be located conveniently nearby.

1. Remove the wiring compartment cover and make electrical connections per the wiring diagram located inside the control housing cover panel. A waterproof electrical connection from the power supply to the rear of the control housing must be provided.

2. The kettle must be grounded in accordance with the requirements of the National Electrical Code or applicable local codes.

3. Ground the kettle to the terminal provided in the control housing.

4. Once proper connections are made, replace the wiring compartment cover, turn power ON and check for proper operation.

WARNING: Disconnect the electrical power supply and place a tag at the disconnect switch to indicate you are working on the circuit.

The CROWN EL-20 is a pressure vessel with a double-wall construction that forms a sealed jacket (chamber) around the lower two-thirds of the kettle bowl. The jacket is filled with a permanent solution of water and antifreeze, which completely immerses the replaceable electric heating elements.

When the power switch is turned on and the temperature control knob is set, the heating elements activate. This generates steam within the sealed jacket, creating pressure and heating the surface of the kettle bowl to cook the food product inside.

The Temperature Control (Thermostat) is dial-controlled, allowing for precise temperatures from a slow simmer to a rolling boil. When the preselected temperature is reached, the thermostat de-energizes the heating elements. The cycle repeats as the temperature drops slightly, maintaining a consistent cooking temperature.

The kettle jacket is sealed under a vacuum at the factory, which is indicated by the pressure gauge in the green vacuum zone (approximately 25-30 inches Hg) when the kettle is cold. This vacuum is essential for efficient heat transfer.

Safety features include a safety relief valve, which will automatically open if the pressure in the jacket exceeds its rating, and a low-water level safety probe. If the water level in the jacket becomes too low, the probe will activate an indicator light and shut off power to the heating elements to prevent burnout.

1. Ensure that the external electrical service to the kettle is on.

2. Check the pressure gauge for the correct cold kettle reading. The reading should be in the green area of the gauge, indicating 25 – 30 In. Hg (630 – 730 mm Hg) of vacuum. If the reading is not low enough, follow the VENTING procedure in the troubleshooting section.

3. Place the power switch to the ON position.

4. Preheat the kettle by placing the thermostat knob at ’10’ and wait until the TEMPERATURE light goes off.

NOTICE: Preheating should not be used when cooking milk and egg food products which adhere to hot cooking surfaces. These foods should be placed into the kettle before heating has begun.

5. Add food to be cooked into the kettle.

6. Place the thermostat knob at the required temperature setting from 1 to 10. Refer to the temperature setting table for approximate jacket temperatures.

7. When cooking is finished, set the thermostat knob and power switch to the OFF position.

8. Empty the product from the kettle using the draw-off valve. Be careful to avoid splashing.

9. Add water to the kettle for cleaning purposes and wash thoroughly.

Your kettle should be cleaned immediately after each use. Before cleaning, check that the kettle has cooled enough to touch it.

WARNINGS:

• Disconnect the power supply to the appliance before cleaning or servicing.

• Never spray water into electric controls or components!

• The equipment and its parts are hot. Use care when operating, cleaning and servicing.

CAUTION: Do not use cleaning agents that are corrosive.

Cleaning Procedure:

1. Rinse the inside of the kettle thoroughly and drain to remove any food particles.

2. Using a nylon brush, clean the kettle with a mild detergent and water. Never use steel wool or scouring powder as it will scratch stainless steel. Plain steel wool can leave small pieces of steel which can rust.

3. Rinse the inside of the kettle thoroughly with clean water. Drain the kettle using the tangent draw-off valve to allow the detergent and water solution to drain.

4. Wipe the exterior of the kettle with a clean, damp cloth.

WARNING: If you are cleaning a valve that is assembled to a kettle, be sure the kettle is completely empty of any product.

NOTICE: The draw-off valve has a vulcanized rubber coated stem for better sealing. Do not over tighten. This may cause the rubber to pull away from the stem and permanently damage it. This is not covered under warranty.

1. Turn the large hex nut on the draw-off valve counterclockwise until it is completely disengaged from the threads.

2. Grasp the valve knob and slowly pull out the valve stem. Wash the valve stem, disk and handle.

3. Insert a nylon brush, wet with detergent and water, into the valve body and tangent draw-off tube. Brush vigorously.

4. Replace the valve stem assembly and turn the hex nut until snug. Rinse the kettle with clean warm water.

5. Leave the draw-off valve open when the kettle is not in use.

Metal utensils should never be used as they will scratch the surface of the equipment and rust may begin to form. To remove surface accumulation of rust, follow this procedure:

CAUTION: Improper use of this procedure may damage your appliance!

1. Use undiluted white vinegar with a non-abrasive scouring pad (plastic) or cloth on the affected area to remove the rust stain. The appliance should not be heated and remain at room temperature during the entire cleaning process.

2. If the stain resists removal, additional exposure time with vinegar may be required, up to a maximum of one hour.

3. Thoroughly wash all of the vinegar away with fresh clear water. Dry the surface completely and allow one hour before using the appliance to cook.

CAUTION:

• Under normal operating conditions, a “try lever test” should be performed every two months. Under severe service conditions, or if corrosion and/or deposits are noticed within the valve body, testing must be performed more often. A “try lever test” should also be performed at the end of any non-service period.

• Hot, high pressure fluid may be discharged from body drain and vent during the “try lever” test. Care must be taken to avoid any bodily contact.

• High sound levels may be experienced during the “try lever” test. Wear proper safety equipment and exercise extreme care!

Test Procedure:

Test at, or near, half of the operating pressure by holding the test lever fully open for at least two seconds to flush the valve seat free of sediment and debris. Then release the lever and permit the valve to snap shut.

If the lift lever does not activate, or there is no evidence of discharge, turn off the equipment immediately and contact a licensed contractor or qualified service personnel.

If the water level in the jacket is below the required operating level, the kettle will automatically shut off and the LOW WATER signal light will come on. To restore operation, the kettle must be cool before proceeding with the following steps:

1. Trip the safety relief valve lever to relieve all pressure from the kettle jacket.

2. At the exterior rear of the kettle jacket, remove the nut from the Air Vent.

3. Insert a funnel into the Air Vent opening and slowly add the indicated amount of clean water for your model:

4. Replace the air vent nut.

5. Follow the AIR VENTING INSTRUCTIONS.

6. Continue normal operating procedure of the kettle.

If cooking time is abnormally slow, the issue may be due to air being present in the kettle jacket. To remove air, follow the AIR VENTING INSTRUCTIONS.

If the kettle will not reach and maintain the Pressure Gauge in the green vacuum zone when cold, a slow leak may have developed in the jacket. Check all fitting connections to the jacket, including the heating element gasket. Tighten or replace if necessary.

Slow cooking time may also be due to a burnt-out heating element. Test elements and if defective, replace the complete element assembly.

1. Check that the power supply is available to the kettle.

2. The kettle will not operate if the water level is inadequate in the jacket. Follow the LOW WATER LEVEL instructions.

3. Check for a defective power switch or loose wire connections.

4. If the Thermostat Knob is dialed and the TEMPERATURE indicator light does not come on, the malfunction may be due to a defective Thermostat or loose wiring. If the TEMPERATURE indicator light does come on when the Thermostat Knob is dialed fully to ’10’, the kettle should eventually reach its maximum temperature (290F) and pressure (approx. 40 psi).

5. When the kettle is turned ON and the Thermostat Knob is dialed, check that the Contactors are being energized and power is being made available to the heating elements. Replace defective Contactors if necessary.

If a leak occurs through the valve stem, replace the “O” ring.

If the leak is due to faulty sealing between the stem disc and valve seat, it may be caused by dried-on food residue. Clean the dried-on food residue with an extremely fine emery cloth.

If the rubber vulcanized stem piece has been damaged, it must be replaced.

Check the vacuum/pressure gauge when the kettle is cold. The gauge should be in the green vacuum zone. If not, air must be vented (removed) for proper heating. Use the following procedure to vent air:

1. With the kettle empty, place the power switch in the ON position.

2. Set the temperature control thermostat to ’10’. Heat the kettle until the indicator light goes off.

3. Using a 7/16″ wrench, open the bleed vent one full turn for 10 seconds and then close.

WARNING: SCALD HAZARD

Live steam will escape the bleed nut when opened. Stay clear of live steam when performing this operation.

4. Cool the kettle. Check for proper vacuum in the green vacuum zone. If the reading is not low enough, repeat the entire procedure, steps 1 – 4.