Crown Steam DLTM-40 Installation Manual
INSTALLATION & OPERATION
IMPORTANT FOR FUTURE REFERENCE
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manual for the life of the equipment:
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MANUAL
Direct Steam Single and Twin Mixer Kettles
DLTM-40-(2) DLTM-60-(2) DLTM-80-(2) DLTM-100-(2)
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.
MANUAL 10040R4
WARNING
CROWN FOOD SERVICE EQUIPMENT
Division of Middleby Canada Company Inc.
70 Oakdale Road, Downsview (Toronto) Ontario, Canada, M3N 1V9
Telephone: 919-762-1000 www.crownsteamgroup.com
Printed in Canada
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
1.0 IMPORTANT NOTES FOR INSTALLATION AND OPERATION
It is recommended that this manual be read thoroughly and that all instructions be followed
carefully.
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: 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.
Intended for commercial use only. Not for household use.
This manual should be retained for future reference.
Part No. 10040R4 2 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
TABLE OF CONTENTS
DESCRIPTION PAGE
1.0 Important Notes for Installation and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.0 Service Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.0 Installation Instructions .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.0 Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.0 Cleaning Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7.0 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
8.0 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Appendix A, Material Safety Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Part No. 10040R4 3 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
2.0 SERVICE CONNECTIONS
Part No. 10040R4 4 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
2.0 SERVICE CONNECTIONS
Part No. 10040R4 5 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
3.0 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
tilting, floor mounted in fixed positions on legs with adjustable flanged feet. All kettles are
equipped with a safety relief valve and a steam control valve.
CAPACITIES
All models are suffixed with either -40, -60, -80 or -100 to indicate the capacity of that kettle in
US gallons. Thus a DLTM-40 is a two thirds 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 two thirds of the lower 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 semiliquid 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 psi attains a temperature of 274 degrees Fahrenheit (135 Celsius).
In the initial stages of the cooking process when the steam comes in contact with the cold kettle
bowl surface it condenses and forms considerable amounts of water. A thermostatic steam
trap should be plumbed to the exit end of the kettle jacket. This trap is a mechanical device
that closes on high temperatures and opens when the temperature drops thus allowing the
water formed from condensate to exhaust but retain steam under pressure.
Part No. 10040R4 6 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
4.0 INSTALLATION INSTRUCTIONS
The kettle must be installed in accordance with State and/or local codes. 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).
1. Select a location to provide drainage for kettle pour path when tilted and for butterfly valve
if so equipped. Allow sufficient rear clearance from wall for access to rear service panel on
hydraulic console.
2. Level unit. Mark anchoring hole locations through flanged adjustable feet.
3. Remove unit and drill holes as marked and, insert expansion shields to accommodate
5/16" size lag bolts.
4. Reposition unit. Re-check level.
5. Bolt down unit and seal bolts with Silastic or equivalent sealing compound. Sealant must
be applied not only to bolt heads but also around flanges making contact with the floor
surface to fulfil NSF requirements. Wipe off excess sealant immediately.
6. Connect steam line (3/4" pipe size) to the steam inlet. Make sure there is a steam control
valve strainer convenient to the unit. If incoming steam pressure is greater than kettle
maximum operating pressure, then a pressure reducing valve must be installed in the line.
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. A steam line pressure gauge is also
recommended to determine the actual amount of steam coming to the kettle.
7. Connect the condensate return line to a drain or to the boiler return line. Return line must
have a check valve.
8. Connect cold water supply line as indicated in bottom of hydraulic console.
9. A control box with a power supply equivalent to the electrical rating of the unit should be
located nearby. A waterproof electrical connection for the power supply to the unit must be
provided.
10. Connect power supply as indicated.
11. Relief valves on the kettles must not be adjusted or closed off as they are set to relieve
excess pressure in the kettles.
12. Do not make any adjustments to the hydraulic valves as they have all been adjusted at the
factory.
13. Turn unit on when electrically connected, and check for proper operation.
Part No. 10040R4 7 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
5.0 OPERATING INSTRUCTIONS
OPERATION OF KETTLES
1. If kettle has a butterfly valve close it.
2. Fill kettle with product to desired level.
3. Slowly turn the steam control valve ON to full open position (counterclockwise).
4. The water or food should boil 3 to 4 minutes per gallon. If it does not then incoming pressure
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.
OPERATION OF MIXER UNIT
Power to operate the mixer unit is controlled by the “Main Power” switch located on the left side
of the control panel. Place switch in the “ON” position. Ensure that mixer “speed” control is set
to the “stop” position. Set the mixer switch, located beside the main power switch, to “ON”
position. Note that the agitators should not be turning. The speed control has four basic
settings which are: stop, slow, medium and fast. Set the speed control to the slow position and
observe that the agitators turn.
WARNING: Never place hands inside kettle when agitators are in
motion.
Increasing the speed setting on the control will increase the speed at which the agitators turn.
NOTE: Always start agitators at the slow speed and then gradually increase to
the desired speed to avoid splashing or “throwing” the product over edge of
kettle.
TO RAISE MIXER BRIDGE
To tilt kettle for emptying or to clean agitators, the mixer bridge will tilt hydraulically upward and
manually swing clear of the kettle. To do this, first turn speed control to “STOP” and then turn
mixer switch to “OFF.”
Part No. 10040R4 8 2018-12-05
INSTALLATION AND OPERATION MANUAL, DIRECT STEAM SINGLE & TWIN MIXER
KETTLE, MODELS DLTM-40 TO DLTM-100 AND DLTM-40-2 TO DLTM-100-2
5.0 OPERATING INSTRUCTIONS (Continued)
NOTE: Mixer agitator arms must be stopped at 90 degrees to the
mixer bridge before raising the bridge. If the agitator arms do not
stop in this position when speed selector is set to stop, then “jog”
the selector on and off to achieve this position.
Push and hold the “TILT” switch in the “RAISE” position. Bridge will raise to maximum height.
Bridge will stop at any position if the tilt switch is released and will remain in that position until
switch is pushed to either raise or lower. When the bridge is fully raised it can be manually
turned to the side to clear kettle.
NOTE: The bridge is equipped with a safety switch which prevents turning of
the agitators, regardless of the mixer switch, or speed control settings.
Agitators will not engage unless the bridge is lowered so that the guide pin
rests fully in the guide pin bracket on the side of the kettle.
REMOVAL OF AGITATORS
For ease of cleaning, the agitators are removable without tools. To remove, raise bridge as
described above and swing clear of kettle. Grasp shaft of large agitator, push up and turn to
disengage lock pin. Pull straight down on agitator. Remove the small agitator in the same
manner. Soak and wash agitators in warm, soapy water. Never use abrasive cleansers or
scouring pads on the stainless steel surfaces as this will damage the finish of the stainless
steel.
If it is necessary to remove the scraper blades from the large agitator for cleaning purposes, do
so by removing the pin at the end of the mounting shaft and then slide the scraper blades off of
the shaft.
To clean the exterior stainless steel panels of your unit, use a damp soft cloth or soft cloth and
stainless steel cleaner. Never use abrasive cleansers or scouring pads on the stainless steel
surfaces as this will damage the finish of the stainless steel.
Part No. 10040R4 9 2018-12-05
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