CROWN DL-20F Full Jacket Direct Steam Stationary Kettles Instruction Manual

DL-20F Full Jacket Direct Steam Stationary Kettles
Instruction Manual Installation & Operation Manual
Full Jacket Direct Steam
Stationary Kettles
DL-20F, DL-30F, DL-40F & DL-60F
DP-20F, DP-30F, DP-40F & DP-60F

IMPORTANT FOR FUTURE REFERENCE
Please complete this information and retain this manual for the life of the equipment:
Model #:
Serial #:
Date Purchased: _____
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.

SAFETY PRECAUTIONS

Before installing and operating this equipment, be sure everyone involved in its operation is fully trained and aware of precautions. Accidents and problems can be caused by failure to follow fundamental rules and precautions.
The following symbols, found throughout this manual, alert you to potentially dangerous conditions to the operator, service personnel, or to the equipment.
DANGER
This symbol warns of immediate hazards that will result in severe injury or death.
WARNING
This symbol refers to a potential hazard or unsafe practice that could result in injury or death.
CAUTION
This symbol refers to a potential hazard or unsafe practice that could result in injury, product damage, or property damage.
NOTICE
This symbol refers to information that needs special attention or must be fully understood, even though not dangerous.
IMPORTANT NOTES FOR INSTALLATION AND OPERATION
WARNING
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages
that follow this symbol to avoid possible injury or death.
WARNING
FOR YOUR SAFETY:
Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.
WARNING
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.
NOTICE
Contact the factory, the factory representative or local service company to perform maintenance and repairs.
NOTICE
This manual should be retained for future reference.

Service Connections

SERVICE CONNECTIONS
– STEAM SUPPLY: 3/4” IPS (19 mm) 5-30 psi (34-205 kpa). Optional 5-45 psi (34-310 kpa).
– CONDENSATE RETURN: 1/2” IPS (13 mm)
DIMENSIONS

Model

| Capacity| Units| A| B| C| D| E| F| G| H| J| K|

L

---|---|---|---|---|---|---|---|---|---|---|---|---|---
DL-20F| 20 gallons
(76 liters)| in (mm)| 26”
(660)| 15.75”
(400)| 37”
(940)| 27.5”
(699)| 19”
(483)| 14.25”
(362)| 16”
(406)| 22.88”
(581)| 30.63”
(1518)| 18.75”
(476)| 64.5”
(1638)
DL-30F| 30 gallons
(114 liters)| in (mm)| 29”
(749)| 17.5”
(445)| 37”
(940)| 31”
(787)| 17.25”
(438)| 16”
(406)| 17.75”
(451)| 25”
(635)| 29.69”
(754)| 17”
(432)| 68”
(1727)
DL-40F| 40 gallons
(152 liters)| in (mm)| 33”
(838)| 19.25”
(489)| 37”
(940)| 34.50”
(876)| 15.5”
(394)| 18”
(457)| 19.5”
(495)| 29.88”
(759)| 29.13”
(740)| 15.25”
(387)| 71.5”
(1816)
DL-60F| 60gallons
(227 liters)| in(mm)| 35.5”
(902)| 20.5”
(521)| 40.5”
(1029)| 37”
(940)| 17.75”
(451)| 17.5”
(445)| 20.75”
(527)| 32.38”
(627)| 32.13”
(1851)| 17.5”
(445)| 77.5”
(1969)

SPECIFICATIONS

SERVICE CONNECTIONS
– STEAM SUPPLY: 3/4” IPS (19 mm) 5-30 psi (34-205 kpa). Optional 5-45 psi (34-310 kpa).
– CONDENSATE RETURN: 1/2” IPS (13 mm)
DIMENSIONS

(1473)
DP-30F| 30 gallons
(114 liters)| in (mm)| 29.5”
(749)| 17.5”
(445)| 32”
(813)| 34.13”
(867)| 12.38”
(314)| 17.63”
(448)| 18.13”
(460)| 16.63”
(422)| 24.63”
(625)| 11.88”
(302)| 62.88”
(1597)
DP-40F| 40 gallons
(152 liters)| in (mm)| 33”
(838)| 19.25”
(489)| 33.75”
(857)| 37.63”
(956)| 12.38”
(314)| 19.38”
(492)| 19.88”
(505)| 19.63”
(499)| 25.75”
(654)| 11.88”
(302)| 67.88”
(1724)
DP-60F| 60 gallons
(227 liters)| in (mm)| 35.5”
(902)| 20.5”
(521)| 35”
(889)| 40”
(1016)| 12.38”
(314)| 20.13”
(511)| 21.13”
(537)| 19.63”
(499)| 26.5”
(673)| 11.88”
(302)| 71.63”
(18.19)

SPECIFICATIONS

INSTALLATION

Full Jacket Direct Steam Stationary Kettles
IMMEDIATELY INSPECT FOR SHIPPING DAMAGE
Immediately after unpacking the steamer, check for possible shipping damage. If the steamer is found to be damaged, save the packaging material and contact the carrier within 15 days of delivery.
Installation Instructions

1. Select a location to provide drainage directly below the tangent Draw-off Valve.
2. Mark hole locations through flanged adjustable feet on DL-F models and through pedestal base on DP-F models. Remove kettle.
3. On hole locations marked, drill holes and insert expansion shields to accommodate 5/16″ size lag bolts.
4. Reposition kettle. On DL-F models level kettle by making necessary adjustment on flanged foot.
5. 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 or pedestal base making contact with floor surface to fulfill NSF requirements.
6. Install a steam control valve at a convenient location near kettle on the incoming steam line (3/4″ size pipe).
7. Connect steam line to the kettle, making sure there is a steam control valve strainer fairly convenient to the kettle.
8. Connect kettle condensate return line to a drain or to a boiler return line. Each kettle return line must have a suitable steam trap. Boiler return lines must have a check valve.
9. Safety relief valve on kettle must not be plugged as it is set to relieve excess pressure in the kettle.
10. If incoming steam pressure is greater than kettle maximum operating pressure then a pressure reducing valve must be installed in the line.
11. If large amounts of water accumulate in the steam line it will be necessary to install one or more ball float traps in the line to eliminate the water.
12. A steam line pressure gauge is also recommended to determine the actual amount of steam coming to the kettle.
13. Check for proper operation.

Introduction

Description
All Crown direct connected steam jacketed kettles pertaining to this manual are direct steam operated pressure vessels of a double-wall stainless steel construction forming a steam chamber (jacket) enveloping the lower two thirds of the kettle bowl surface. All kettles are stationary, floor mounted in fixed positions either on legs with adjustable flanged feet (DL models) or pedestal (DP models).
Basic Functioning
Capacities
All models are suffixed with either – 20F, – 30F, – 40F, – 60F to indicate the capacity of that kettle in US gallons. Thus a DL – 40F is a full jacketed direct steam kettle mounted on legs with a capacity of 40 gallons (US).
Functioning Mode
Crown direct connected steam jacketed kettles consist of a stainless steel bowl and a stainless steel jacket which envelopes the surface of the bowl, thus forming a sealed pressure vessel (chamber) into which steam is introduced by means of a manual control valve.
The kettle bowl is the container for the food product which ideally should be of a liquid or semi-liquid consistency to achieve complete contact with the bowl surface and thus fully absorb the heat transmitted through that surface.
The temperatures required for the cooking process to function adequately must be greater than the boiling point of the liquid food product. Further, the greater the steam pressure used, the higher the temperature and consequently the quicker the cooking process. For example, steam pressurized at 30 p.s.i. attains a temperature of 274 degrees Fahrenheit (135 degrees Celsius).

Operation

WARNING
The appliance and its parts are hot. Use care when operating, cleaning and servicing the appliance.

Operating Instructions

1. Ensure that draw-off valve is closed.
2. Fill kettle with product to desired level.
3. Slowly turn the steam control valve ON to full open position (counter clockwise).
4. The water or food should boil 2 – 3 gallons per minute. If it does not then incoming pressure and piping should be checked to determine that it is adequate to operate the kettle efficiently.
5. Regulate steam control valve depending on type of food being prepared.
6. When food is cooked, turn off steam, remove food and clean kettle immediately to prevent residue from drying on kettle bowl surface.

Cleaning

WARNING
The equipment and its parts are hot. Use care when operating, cleaning and servicing.
Your kettle should be cleaned immediately after each use.

1. Ensure that steam supply is OFF.

2. Pre-rinse inside of kettle thoroughly and drain to remove any food particles.

3. Using a nylon brush, clean kettle with a mild detergent and warm water rinse. Never use steel wool or scouring powder as it will scratch stainless steel.

4. Open the tangent draw-off valve to allow soap and water solution to drain. Rinse with clean water.
   WARNING
   If you are cleaning a valve that is assembled to a kettle be sure the kettle is completely empty of any product.
   By hand, turn the large hex nut counterclockwise on draw off valve until it is completely disengaged from thread. Grasp knob to valve and slowly pull out valve stem and disc. Do not allow disc to come in contact with hard surfaces since damage to disc may occur and result in valve leakage. Wash the valve stem, disc and handle. Insert nylon brush with detergent into interior of valve body and tangent draw-off tube and brush vigorously.

5. Replace valve stem assembly and engage hex nut fully by hand. Flush kettle with clean warm water.

6. Leave valve open when kettle is not in use.

CAUTION
Do not use cleaning agents that are corrosive.
Use of cleaning agents that contain chloride, acids or salts are corrosive and may cause pitting and corrosion when used over a period of time; this will reduce the life of the appliance.
Pitting or corrosion are not covered by warranty.
Follow the recommended cleaning instructions. Use a mild detergent, warm water and rinse thoroughly.

Maintenance

Venting
It is recommended that the “optional” steam trap assembly be installed. This should be plumbed to the exit end of the kettle. The thermostatic trap is a mechanical device that closes on high temperature and opens when the temperature drops, allowing the water which formed from condensate to exhaust but retain the steam under pressure.
Safety Valve Maintenance and Testing
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.
CAUTION
Hot, high pressure fluid may be discharged from body drain and vent during “try lever” test. Care must be taken to avoid any bodily contact.
CAUTION
High sound levels may be experienced during “try lever” test. Wear proper safety equipment and exercise extreme care! 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 lever and permit the valve to snap shut.
If lift lever does not activate, or there is no evidence of discharge, turn off equipment immediately and contact a licensed contractor or qualified service personnel.

Troubleshooting

Draw-Off Valve Leaks
If a leak occurs through the valve stem, replace the “O” ring.
If the leak can be attributed to faulty sealing occurring between the stem disc and valve seat, then this problem may be corrected by cleaning off the dried-on food residue with extremely fine emery cloth. If the vulcanized rubber stem piece has been damaged, it must be replaced.
NOTICE
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 stem and permanently damage it. This is not covered under warranty.
Extremely Slow Cooking Time
If the cooking time is abnormally slow, it may be due to insufficient steam pressure and/or volume. First determine that pressure on incoming steam line at kettle is within 5 p.s.i. of rated kettle pressure.
NOTICE
Pressures approaching the rated kettle pressure are liable to set off the safety relief valve.
If required pressure is available to kettle, then possibly volume of steam is not sufficient.
Minimum 3/4″ pipe size is required to the kettle but if the steam generating source is at a great distance from the kettle, larger supply pipe will be required.
Finally, the core of the steam supply pipe may have debris or scalants that impede steam flow and will require disassembly and inspection.

DL-20F, DL-30F, DL-40F & DL-60F DP-20F, DP-30F, DP-40F & DP-60F
FULL JACKET DIRECT STEAM STATIONARY KETTLES
A product with the Crown name incorporates the best in durability and low maintenance. We all recognize, however, that replacement parts and occasional professional service may be necessary to extend the useful life of this appliance.
When service is needed, contact a Crown Authorized Service Agency, or your dealer. To avoid confusion, always refer to the model number, serial number, and type of your appliance.

CROWN FOOD SERVICE EQUIPMENT
A Middleby Company
70 Oakdale Road, Downsview (Toronto )
Ontario, Canada, M3N 1V9
Telephone: 919-762-1000
www.crownsteamgroup.com
FULL JACKET DIRECT STEAM
STATIONARY KETTLES
Manual Section CO

References

• Crown Steam – Steam Cooking Solutions

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