CROWN DMS Series Direct Steam Power Tilting or Stationary Kettles Instruction Manual
- June 11, 2024
- CROWN
Table of Contents
DMS Series Direct Steam Power Tilting or Stationary Kettles
Product Information:
The Direct Steam Power Tilting or Stationary Kettles are
commercial kitchen equipment manufactured by Crown Food Service
Equipment, a Middleby Company. The product is available in six
different models, including DMT-30, DMT-40, DMT-60, DMS-30, DMS-40,
and DMS-60. The kettles are designed to be powered by direct steam
and can be used for cooking large quantities of food in commercial
kitchens.
The product comes with an installation & operation manual
that includes important safety precautions, information about
service connections, and instructions for installation, operation,
and maintenance.
Product Usage Instructions:
Before installing and using the Direct Steam Power Tilting or
Stationary Kettles, it is important to ensure that everyone
involved in the operation is fully trained and aware of the safety
precautions. Failure to follow the safety rules and precautions can
lead to accidents and problems.
To install and operate the equipment safely, please follow the
steps below:
-
Read the installation, operating, and maintenance instructions
provided in the manual thoroughly before installing or servicing
the equipment. -
Ensure that the electrical connection to the equipment is 115V,
60 Hz, single Phase, 10 Amps with grounding wire as specified in
the manual. -
Do not store or use gasoline or other flammable vapors or
liquids in the vicinity of this or any other appliance. -
Disconnect the power supply to the appliance before cleaning or
servicing. -
Operating, testing, and servicing should only be performed by
qualified personnel. -
It is important to note that this product is intended for
commercial use only and not for household use.
By following the above instructions and the safety precautions
mentioned in the manual, you can ensure safe and efficient
operation of the Direct Steam Power Tilting or Stationary
Kettles.
Installation & Operation Manual
IMPORTANT FOR FUTURE REFERENCE Please complete this information and retain
this manual for the life of the equipment:
Model #: Serial #:
Date Purchased: _____
Direct Steam Power Tilting or Stationary Kettles
DMT-30, DMT-40, DMT-60, DMS-30, DMS-40 & DMS-60
Model DMT
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.
CROWN FOOD SERVICE EQUIPMENT
A Middleby Company
70 Oakdale Road, Downsview (Toronto) Ontario, Canada, M3N 1V9
Telephone: 919-762-1000
www.crownsteamgroup.com
MANUAL 10074 REV 3 (10/22) $21.00
DIRECT STEAM POWER TILTING OR STATIONARY KETTLES MANUAL SECTION CO
Safety Precautions
Direct Steam Power Tilting or Stationary Kettles
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 NOTICE
This symbol refers to a potential hazard or unsafe practice that could result
in injury, product damage, or property damage.
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.
WARNING
Disconnect the power supply to the appliance before cleaning or servicing.
CAUTION
Operating, testing, and servicing should only be performed by qualified
personnel.
NOTICE
This product is intended for commercial use only. NOT FOR HOUSEHOLD USE.
NOTICE
This manual should be retained for future reference.
Copyright © 2022 by Crown. All rights reserved. Published in the United States of America.
PAGE 2 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
RETAIN THIS MANUAL FOR FUTURE REFERENCE.
Table of Contents
Table of Contents
Important Notes For Installation and Operation ………………………………………………………….. 2
Service Connections ………………………………………………………………………………………………. 4
Installation…………………………………………………………………………………………………………….. 5 Introduction
…………………………………………………………………………………………………………… 6 Basic
Functions……………………………………………………………………………………………………… 6 Operation
……………………………………………………………………………………………………………… 7 Maintenance
…………………………………………………………………………………………………………. 8 Hydraulic System Adjustments (DMT
Only)……………………………………………………………….. 9
Cleaning……………………………………………………………………………………………………………….. 10 Troubleshooting
…………………………………………………………………………………………………….. 11 Appendix A Material Safety Data
Sheets ………………………………………………………………… 12
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 3 OF 20
Service Connections
Direct Steam Power Tilting or Stationary Kettles
SERVICE CONNECTIONS
SERVICE CONNECTIONS
COLD WATER: 3/8″ O.D. tubing to faucet.
HOT WATER: 3/8″ O.D. tubing to faucet.
DRAIN: 1-5/8″ (41.275 mm) O.D. tubing piped to open floor drain. No solid
connection. ELECTRICAL CONNECTION: (DMT models only) 1/2″ conduit connection
to controls. Unless otherwise
specified, field wire electrical connection to be 115V, 60 Hz, single Phase,
10 Amps with grounding wire.
STEAM SUPPLY: 3/4″ (19 mm) IPS for incoming steam. MIN 5PSI (34kPa), MAX 30
PSI (207 kPa). Important: Pressure reducing valve required if incoming steam
pressure exceeds the kettle rating.
Model DMT-30 DMS-30 DMT-40 DMS-40 DMT-60 DMS-60
Capacity
30 Gallons (114 liters)
40 Gallons (151 liters)
60 Gallons (227 liters)
A
24″ (610)
26″ (660)
29.5″ (749)
DIMENSIONS
B
C
36″ (914)
16″ (406)
36″ (914)
15″ (381)
42″ (1067)
16″ (406)
D
39″ (991)
40″ (1016)
43″ (1092)
E
37.25″ (946)
38.38″ (975)
41.12″ (1045)
F
41.5″ (1054)
42.5″ (1080)
47.62″ (1210)
G
65.25″ (1657)
68.25″ (1733)
74.25″ (1886)
Model
DMT-30 DMS-30
Shipping Weight
Minimum Clearance
475 lbs. [215 kg] SIDES 0 375 lbs. [170 kg] BACK 0
SPECIFICATIONS
Model
DMT-40 DMS-40
Shipping Weight
Minimum Clearance
525 lbs. [238 kg] SIDES
0
400 lbs. [181 kg] BACK
0
Model
DMT-60 DMS-60
Shipping Weight
Minimum Clearance
600 lbs. [272 kg] SIDES 0
500 lbs. [227 kg] BACK
0
PAGE 4 OF 20
As continued product improvement is a policy of Crown, specifications are subject to change without notice. INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Installation
Installation Instructions
UNPACKING
IMMEDIATELY INSPECT FOR SHIPPING DAMAGE
Immediately after unpacking, check for possible shipping damage. If the
appliance is found to be damaged, save the packaging material and contact the
carrier within 15 days of delivery.
We cannot assume responsibility for damage or loss incurred in transit.
Installation
WARNING
Electrical and grounding connections must comply with applicable portions of
the National Electrical Codes.
WARNING
Plumbing connections must comply with applicable health, safety and plumbing
codes.
1. Select a location to provide drainage directly below the draw-off valve.
Allow sufficient rear clearance from the wall for the kettle cover to lift
upright freely without obstructions. Allow for clearance to side service
panels.
2. Level the unit. Then mark anchoring hole locations through flanged
adjustable feet. 3. With hole locations marked, drill holes and insert
expansion plugs to accommodate 5/16″ size lag bolts. 4. Reposition the kettle.
Check the level again. 5. Bolt the kettle down and seal with a high grade
sealing compound. Sealant must be applied not only to bolt heads
but around the flanges and must be making contact with floor surface to meet
N.S.F. requirements. Wipe off excess sealant immediately. 6. Connect the steam
line to the kettle (3/4″ i.p.s., 5 psi minimum to 30 psi maximum, or 45 psi
with optional high pressure operation). 7. If the incoming steam pressure is
greater than the kettle maximum operating pressure, then a pressure reducing
valve (supplied by others) must be installed in the line. 8. Connect hot and
cold water supply to the faucet. 9. Connect the kettle condensate return line
to a 2″ open air gap drain or to a boiler return line. Each kettle return line
must have a suitable steam trap (supplied by others). Boiler return lines must
have a check valve (supplied by others). 10. A control box with a power supply
equivalent to electrical rating of the unit should be located nearby. A
waterproof electrical connection for the power supply to the unit must be
provided (for Power tilting models only). 11. The relief valve on the kettle
must not be adjusted or closed off as it is set to relieve excess pressure in
the kettle. 12. If large amounts of water accumulate in the steam line, it
will be necessary to install one or more ball float traps (supplied by others)
in the line to eliminate the water. 13. A steam line pressure gauge (supplied
by others) is also recommended to determine the actual amount of steam coming
to the kettle. 14. Turn unit on when electrically connected, then check for
proper operation.
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 5 OF 20
Introduction / Basic Functions
Direct Steam Power Tilting or Stationary Kettles
Introduction
Description
The CROWN DMS and DMT kettles are direct steam models mounted in a modular
cabinet base. The DMS is a modular stationary model supplied with a tangent
draw-off valve for food product removal.
The DMT is a direct steam modular tilting model. It has a hydraulic pump and
cylinder to tilt the kettle to any angle between zero and ninety degrees for
complete emptying of food products. Tilting models include a pan carrier that
holds a 12″ x 20″ pan. (Pan not supplied.)
Both of these units employ kettles which are direct steam operated pressure
vessels with a double wall stainless steel construction forming a steam
chamber (jacket) around the lower two thirds of the kettle. These kettles are
furnished with a steam control valve and a hot and cold water fill faucet
mounted on the stainless steel counter top. Every kettle has a pressure relief
valve. Access to the inner cabinet area for installation or service is through
the removable side panels or the doors on the front of the unit.
The kettle bowl is the container for the food product which ideally should be
a liquid or semi-liquid for complete contact with the bowl surface to fully
absorb the heat transmitted through the surface from the steam in the kettle
jacket.
These kettles are intended to be permanently floor mounted with adjustable
flanged feet.
Basic Functions
Capacities
All models end with 20, 30, 40 and 60 to indicate the capacity of that kettle
in gallons. For example, model DMT-40 indicates a tilting two thirds jacketed
steam kettle mounted in a cabinet base, with a capacity of 40 gallons. A
DMS-40 is stationary.
Controls
The electric controls are in the upper right area of the kettle front. One
control is an ON-OFF switch for the tilting mechanism. The second control, in
the up position tilts the kettle forward to full tilt. In the down position
the kettle is lowered to full down. Stopping the up or down control will hold
the kettle at any position the kettle is stopped.
Pan Carrier (DMT Model Only)
The DMT (tilting) model is equipped with a pan carrier. The pan support is
made of stainless steel and is removable, without tools, for cleaning. It
holds one 12″ x 20″ pan and will locate the pan in a horizontal position not
more than 2″ from the kettle lip throughout the tilting operation.
Swing Drain
Each kettle has a swing drain to use with the draw-off valve. It is removable,
without tools, and has a removable strainer.
Hydraulic System (DMT Model Only)
The hydraulic system in every DMT kettle has been adjusted and tested at the
factory and no further adjustment should be needed. If the unit fails to
operate properly, all service work must be performed by a qualified service
agent.
PAGE 6 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Operation
WARNING
Do not tilt kettle with lid down.
Operation
WARNING
The kettle is hot. Use care when operating and servicing the kettle.
Operating Instructions
1. With tilting units, turn the power switch on only during tilt cycles.
Running the hydraulic power unit continuously may overheat or damage the
system.
2. Push the toggle switch to the up position. Check that the kettle begins to
rise. Allow the kettle to travel to its full up position then push the toggle
switch to the down position and the kettle will return to the original
position. The kettle will stop and hold its position at any point along the
travel path if the toggle switch is released.
3. Check that the draw-off valve is closed. 4. Fill the kettle with product
to the desired level.
NOTICE
Food products with milk or egg base should be placed into a cold kettle before
the cooking operation begins. Avoid sudden contact of these food products in a
hot kettle, the food will stick to the surface.
5. Slowly turn the steam control valve to the full open position
(counterclockwise). The kettle will begin to heat. It is important that the
condensate return valve located on the bottom of the kettle be opened daily
before starting the unit up to allow any accumulation of water to be emptied.
Otherwise the efficiency of the kettle is reduced.
6. Slowly open the relief valve to allow all air to escape. Stay clear of the
valve outlet during this operation to avoid very hot steam.
7. Regulate the steam control valve depending on the type of food being
prepared.
8. When the food is cooked, turn off the steam, remove the food through the
draw-off valve or by tilting. Clean the kettle immediately to prevent residue
from drying on the kettle bowl.
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 7 OF 20
Maintenance
Direct Steam Power Tilting or Stationary Kettles
Maintenance
Kettle
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.
Hydraulic System (DMT Only)
Service
Set up regular schedule for checking the oil temperature, hydraulic hoses and
keeping the equipment clean. A thick layer of dirt acts as an insulation and
prevents the hydraulic system from getting rid of heat.
The hydraulic system has been adjusted and tested at the factory and no
further adjustment should be needed. If the unit fails to operate properly,
all service work must be performed by a qualified service agent. 1. Hot oil in
the Hydraulic System is one of the primary causes of poor operation. When the
tilt system is not in use turn
MOTOR switch off.
2. Inspect hydraulic hoses for wear and aging.
3. Check that fluid levels are kept full. 4. To replace oil, fill through
filler breather. 5. Use proper oil as specified by factory or equivalent.
6. Check the cleanliness of the oil strainer inside the reservoir once per
year. This item can be washed in clean Varsol.
7. Change the breather filter once per year.
8. Change the oil once every two years.
PAGE 8 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Hydraulic System Adjustments
Hydraulic System Adjustments (DMT Only)
There are three controls available on this power unit. The first is an adjustable relief valve mounted into the custom aluminum manifold block. The other two control the linear speed of the actuator.
Relief Valve
The relief valve is located underneath an aluminum hexagon cover on the side
of the custom manifold block. This relief valve is factory set to 825 P.S.I.
and locked and should not be adjusted.
If adjustments are necessary, remove the hexagon cover which will give access
to the relief valve screw. With the pump running, and with a suitable flat
blade style screwdriver, rotate the screw clockwise to increase pressure, and
anti clockwise to decrease pressure. While this operation is being carried out
some oil will leak down the threads of the adjusting screw.
To obtain the pressure required, a pressure gauge will have to be located in
the circuit. The best location is on the cylinder hose. To set the pressure,
energize the solenoid to extend the cylinder fully and thus “deadhead” the
system. The pressure can be set as indicated above. When adjustment is
complete, replace the hexagon cover. This will seal the relief valve area. The
actual factory set pressure is noted on the label and should not be exceeded
as this affects the HP draw on the electric motor.
Flow Control
There are two flow control valves mounted on the power unit and located on the
solenoid valve subplate. The flow control valves will restrict the capacity of
oil passing through them when the knurled knob is screwed in – in a clockwise
direction. This action will reduce the linear speed of the cylinder. Turning
the flow control valve adjustment in the opposite direction – anti clockwise,
will increase the speed of the cylinder. One flow control valve (right side)
will allow adjustment of the extension speed (travel speed should be set at
minimum 20 seconds), the other (left side) the retraction speed. (Retraction
speed should be set at minimum 10 seconds).
IMPORTANT
It should be noted that if the cylinder speed is restricted by the flow
control valves, the balance of oil not delivered to the cylinder will go over
the relief @ 825 P.S.I. which will cause unwanted heat in the reservoir.
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 9 OF 20
Cleaning
Cleaning
Direct Steam Power Tilting or Stationary Kettles
WARNING
Disconnect the power supply to the appliance before cleaning or servicing.
WARNING
The appliance and its parts are hot. Use care when operating, cleaning and
servicing the skillet.
Your kettle should be cleaned immediately after each use when cooking a
different product or when cooking is completed. Before cleaning, check that
the kettle has cooled enough to touch it.
1. Check that the steam supply and power supply is OFF.
2. Rinse the inside of the kettle thoroughly and drain to remove any food
particles.
3. 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.
4. Tilt the kettle to its highest position or open the tangent draw-off valve
to allow the detergent and water solution to drain. Rinse thoroughly with
clean water.
5. By hand, turn the large hex nut on the draw-off valve counterclockwise
until it is completely disengaged from the threads. Grasp the valve knob and
slowly pull out the valve stem and disk. Do not allow the disk to come in
contact with hard surfaces as it can be damaged and cause valve leakage. Wash
the valve stem, disk and handle. Insert a nylon brush, wet with detergent and
water, into the valve body and tangent draw-off tube. Brush vigorously.
6. Replace the valve stem assembly and turn the hex nut until snug. Rinse the
kettle with clean warm water. 7. Leave the draw-off valve open when the kettle
is not in use. 8. Wipe the exterior of the kettle with a clean, damp cloth. 9.
Never spray water into the electrical controls.
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. Should pitting or corrosion occur this is
not covered by warranty. Follow the recommended cleaning instructions. Use a
mild detergent, warm water and rinse thoroughly.
What To Do If Surface Rust Appears
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
from the inadvertent use of such utensils, the following procedure may be
used.
WARNING
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, 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.
PAGE 10 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Troubleshooting
Troubleshooting
Draw-Off Valve Leaks
If leak occurs through the valve stem, replace the “O” ring. If the leak can
be attributed to faulty sealing between the stem disk and valve seat, then
this may be corrected by cleaning off the food residue. Another cause may be a
damaged vulcanized rubber stem piece which will require replacement.
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
Abnormally slow cooking time may be due to insufficient steam pressure and/or
volume. Inlet pressures of less than 10 psi will result in slow cooking
performance. Note that pressures approaching the rated kettle pressure are
liable to set off the safety relief valve. If required pressure is not
available to kettle, then 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 pipe will be required. Also check the
core of the steam supply pipe for debris or scalants that impede steam flow.
May require disassembly and inspection.
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 11 OF 20
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PAGE 12 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Material Safety Data Sheets
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 13 OF 20
Material Safety Data Sheets
Direct Steam Power Tilting or Stationary Kettles
PAGE 14 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Material Safety Data Sheets
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 15 OF 20
Material Safety Data Sheets
Direct Steam Power Tilting or Stationary Kettles
PAGE 16 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Material Safety Data Sheets
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 17 OF 20
Material Safety Data Sheets
Direct Steam Power Tilting or Stationary Kettles
PAGE 18 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
Direct Steam Power Tilting or Stationary Kettles
Material Safety Data Sheets
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
PAGE 19 OF 20
Direct Steam Power Tilting or Stationary Kettles
DMT-30, DMT-40, DMT-60 DMS-30, DMS-40 & DMS-60 Direct Steam Power Tilting or
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
PAGE 20 OF 20
INSTALLATION & OPERATION MANUAL 10074 REV 3 (10/22)
References
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