Middleby CROWN SX-34EC User manual

MANUAL 10079R5
INSTALLATION & OPERATION
MANUAL
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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.
IMPORTANT FOR FUTURE REFERENCE
Please complete this information and retain this
manual for the life of the equipment:
Model #: ___________________________
Serial #: ___________________________
Date Purchased: ____________________
CROWN FOOD SERVICE EQUIPMENT
A Middleby Company
70 Oakdale Road, Downsview (Toronto) Ontario, Canada, M3N 1V9
Telephone: [phone] www.crownsteamgroup.com
Printed in Canada

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
IMPORTANT NOTES FOR INSTALLATION AND OPERATION
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.
This manual should be retained for future reference.
Intended for commercial use only. Not for household use.
Adequate clearances must be maintained for safe and proper operation.
Part No. 10079R5 2 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
TABLE OF CONTENTS
DESCRIPTION PAGE
Important Notes for Installation and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.0 Service Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.0 Installation Instructions .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.0 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.0 Cleaning .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.0 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.0 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.0 Service .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Part No. 10079R5 3 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
1.0 SERVICE CONNECTIONS
Part No. 10079R5 4 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
2.0 INSTALLATION INSTRUCTIONS
This steamer was inspected before leaving the factory. The transportation company assumes
full responsibility for safe delivery upon acceptance of the shipment. Immediately after
unpacking the steamer, check for possible damage. If the steamer is found to be damaged
after unpacking, 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
machine data plate which is located on the left side panel.
LOCATION
Allow space for plumbing and electrical connections. Allow adequate access for operating and
servicing the steamer, 36" (915 mm) at the front of the steamer and 15" (381 mm) above the
steamer.
LEVELLING AND ANCHORING
Using a spirit level or pan of water in the bottom of the steamer, adjust the levelling feet to level
the steamer front-to-back and side-to-side.
Mark hole locations on the floor through the anchoring holes provided in the flanged adjustable
feet. Remove the steamer and drill holes at marked locations on the floor. Insert proper
anchoring devices.
Set steamer back in proper position.
Install bolts through anchoring holes and into anchors to secure the steamer to the floor. Seal
bolts and flanged feet with Silastic.
After the drain is connected, check for level by pouring water onto the floor of the compartment.
All water should drain through the opening at the back of the compartment cavity.
ELECTRICAL CONNECTION
WARNING: Electrical and grounding connections must comply with
applicable portions of the national electrical code and/or other local
electrical codes.
Part No. 10079R5 5 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
INSTALLATION INSTRUCTIONS (Continued)
WARNING: Disconnect the power supply to the appliance before
cleaning or servicing.
Make electrical connection through the 1-1/8" (29 mm) diameter hole provided using 3/4" (19
mm) trade size conduit. Refer to the wiring diagram located inside the right side panel. Use
90EC minimum insulated wire.
PLUMBING CONNECTIONS
WARNING: Plumbing connections must comply with applicable
sanitary, safety, and plumbing codes.
The water supply inlets are provided with 3/8" (10 mm) compression fittings for 3/8" O.D.
copper tubing. The water supply line pressure should be 25 - 50 psi (170 - 345 kPa) for each
line. The water supply to the generator tank is separate from the water supply to the cooling
system where steam is condensed before entering the drain line.
Install line strainers (not provided). A manual shutoff valve for each supply line must be
provided convenient to the steamer.
Treated water feeding the boiler inlet supply is
recommended, and untreated water feeding the
condensing water inlet. Hook-ups are labelled on the
back of the steamer.
Units are provided with an adjustable condensing water
valve. It has been factory set to 2-1/2 turns open, that will
suit most installations. Adjust as required to suit local
water inlet temperature and pressure. Turn screw
clockwise to decrease flow or counterclockwise to
increase flow.
Part No. 10079R5 6 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
DRAIN CONNECTIONS FIGURE 1
The drain connection must be 1½"
(37.5 mm) IPS down, preferably with one or
two elbows only, maximum length 6 feet
(1830 mm) horizontal and piped to an open
gap type drain (Figure 1). Drain pipe
should be copper. DO NOT use PVC pipe
– PVC pipe may lose its rigidity or glue may
fail.
CAUTION: To avoid
injury or damage to the
steamer, do not connect
solidly to any drain
connection.
WATER QUALITY
The water supply connected to the steam generator should meet the following guidelines:
Failure to comply with water quality statement on page 4 may void the warranty.
Water supplies vary from one location to another. Other factors affecting steam generation are
iron content, chlorides, and dissolved gasses. A local water treatment specialist should be
consulted before installing any steam generating equipment.
Untreated water contains scale producing minerals which can precipitate onto the surfaces in
the generator tank. Due to the temperatures in the generator, the minerals can bake onto the
surfaces and components. This can result in early component failure and reduced product life.
Mineral scale on components causes several problems:
1. The surfaces of the heating devices become coated with scale, reducing the heat transfer
efficiency. This can produce hot spots on the heating elements and result in premature
failure.
Part No. 10079R5 7 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
WATER QUALITY (Continued)
2. The water level probes become coated with scale. Scale will bridge across the probe
insulator from the metal extension which senses the water level in the generator tank. Once
this scale becomes wet, the water level control is unable to maintain the proper water level.
This situation may cause an electric heating element to fail if the element is not adequately
covered by water.
Strainers and filters will not remove minerals from the water.
Refer to REMOVAL OF LIME SCALE DEPOSITS, page 19.
VENT HOOD
Some local codes may require the steamer to be located under an exhaust hood. Information
on the construction and installation of ventilating hoods may be obtained from NFPA Standard
No. 96, Vapor Removal from Cooking Equipment, (latest edition).
Part No. 10079R5 8 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
START-UP TEST
WARNING: The steamer and its parts are hot. Use care when
operating, cleaning or servicing the steamer. The cooking
compartment contains live steam. Stay clear while opening the
door.
Once the steamer is installed and all mechanical connections have been made, thoroughly test
the steamer before operation.
1. Check that proper water, drain, and electrical connections have been made.
2. Turn main power switch ON. After approximately 10 minutes, the READY light should come
on, indicating that the water temperature is 205EF (96EC).
3. When the READY light comes on, set the timer at 5 minutes. With door open, observe that
no steam is entering the compartment and the COOKING light is OFF.
4. Close compartment door. The COOKING light should now be lit and steam should be
heard entering the compartment after about 45 seconds.
5. Check drain line to ensure that water from the cold water condenser is flowing through the
drain line.
6. Open compartment door and observe that steam supply to the chamber is cut off (READY
light should again come on and COOKING light goes off).
7. Close compartment door and let cooking cycle finish. When the timer returns to the “0"
zero position, a buzzer will sound, signalling the end of the cooking cycle. To silence the
buzzer, turn the dial timer to OFF.
8. Complete the above steps for each cooking compartment.
9. To shut the steamer down, turn the main power switch(es) OFF and leave the compartment
doors slightly open to allow the inside to dry out.
Part No. 10079R5 9 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
3.0 OPERATION
CAUTION: Live steam and accumulated hot water in the
compartment may be released when the door is opened.
CAUTION: An obstructed drain can cause personal injury or
property damage.
CONTROLS
Main Power Switch
ON - The generator tank will automatically fill and begin heating to the
preset temperature.
OFF - The generator tank will drain.
DELIME - Closes the drain valve while CLR liquid is being poured into the
generator during the delime procedure.
Ready Light - Indicates the temperature has reached 205EF and that the
steamer is ready to begin cooking.
Cooking Light - Indicates that a cooking cycle is in progress.
Timer - Set the cooking time (0 to 60 minutes). Steam cooking will begin
when the door is closed. The cooking cycle will be interrupted if
the door is opened during the cooking cycle; resume cooking by
closing the door.
When done, a buzzer sounds and steam supply to the cooking
chamber will cease. Turn the timer OFF to stop the buzzer.
Part No. 10079R5 10 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
3.0 OPERATION (Continued)
BEFORE FIRST USE
Clean the protective oils from all surfaces of the steamer. Use a non-corrosive, grease
dissolving commercial cleaner, following manufacturer’s directions. Rinse thoroughly and wipe
dry with a soft clean cloth.
PREHEAT
Turn the main power switch ON. When the READY light comes on, set the timer to 2 minutes
to preheat the compartment. This should be done when the steamer is first used for the day or
whenever the chamber is cold. The door should be closed during the preheat cycle. The
COOKING light will be lit. When the buzzer sounds, set the timer to the OFF position. The
steamer is now ready to cook.
COOK
With compartment preheated and READY light ON, place pans of food into the compartment
and close the door.
Set timer to desired cooking time. (The cooking cycle may be interrupted at any time by
opening the door. To resume operation, close the door.) Steam will flow into the compartment
and the COOKING light will be lit.
At the end of the cooking cycle, the buzzer will sound, the COOKING light will go off and steam
supply to the compartment will cease. Turn the timer to the OFF position to silence the buzzer.
SHUTDOWN
Turn main power switch(es) OFF. The generator(s) will automatically blow down. Leave the
compartment door open to allow the inside to dry out. For an extended shutdown, turn the main
power switch(es) OFF; turn power and water supply OFF.
Part No. 10079R5 11 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
CONSTANT STEAM FEATURE, (OPTIONAL)
A switch has been added to control this feature. It is located below the timer under the heading
“COOKING MODE”.
TIMED COOKING - The switch must be positioned to the right, towards the heading “TIMED
COOKING”. The steamer will then operate as described in the previous section. At the end of
the cook time an audible buzzer will sound.
CONSTANT STEAM COOKING - The switch must be positioned to the left towards the heading
“CONTINUOUS COOKING”. This mode will give continuous steam to the cooking chamber
until the operator either turns the selector switch to the “TIMED COOKED” position, or turns
power OFF to the steamer.
When cooking is complete, or not in use, the constant steam cooking feature should be shut
off. This prevents the steamer from running unnecessarily.
SHUT DOWN
Turn the selector switch to TIMED COOKING. Turn power switch on to “OFF” position.
DRAINING THE STEAMER
Drain the steamer after each day’s use to flush out minerals and minimize scale build-up. The
steamer drains automatically for approximately 4 - 6 minutes after the main power switch is
turned off.
Part No. 10079R5 12 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
COOKING HINTS
Your steamer efficiently cooks vegetables or other foods for immediate serving. Steam cooking
should be carefully time controlled. Keep hot food holding-time to a minimum to produce the
most appetizing results. Prepare small batches, cook only enough to start serving, then cook
additional amounts to meet demand.
Preparation
Prepare vegetables, fruits, meats, seafood, and poultry normally by cleaning, separating,
cutting, removing stems, etc. Cook root vegetables in a perforated pan. Other vegetables may
be cooked in a perforated pan unless juices are being saved. Liquids can be collected in a
solid pan placed under a perforated pan.
Perforated pans are used for frankfurters, wieners, and similar items when juices do not need to
be preserved. Solid pans are good for cooking puddings, rice and hot breakfast cereals.
Vegetables and fruits are cooked in solid pans in their own juice. Meats and poultry are cooked
in solid pans to preserve their juice or return broth.
Canned foods can be heated in their opened cans (cans placed in solid pans), or the contents
may be poured into solid pans. DO NOT place unopened cans in the steamer.
Frozen Food Items
Separate frozen foods into smaller pieces to allow more efficient cooking.
Use a pan cover for precooked frozen dishes that cannot be cooked in the covered containers
in which they are packed if they require more than 15 minutes of cooking time. When a cover
is used, approximately one-third additional cooking time is necessary. Cooking time for frozen
foods depends on the amount of defrosting required. If time permits, allow frozen foods to
partially thaw overnight in a refrigerator. This will reduce their cooking time.
Part No. 10079R5 13 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
SUGGESTED COOKING GUIDELINES
PRODUCT TIMER SETTING
(Minutes)
WEIGHT PER PAN
Eggs 10 - 12 8 dozen
Scrambled 15 4 dozen
Hard Cooked 25 2 lb
Rice, Long Grain (Cover with 4 cups water/lb.) 25 2 lb
Pasta (Place perforated pan inside solid pan,
cover with cold water.)
Spaghetti, Regular/Vermicelli 12 -15
Macaroni, Shells/Elbows 15 - 18
Lasagna Noodles 15 - 18
Frozen Casseroles, Lasagna 35 Full Pan
Meat Loaf, 3 - 5 lb each 40 15 lb
Beef
Ground Chuck 20 - 25 10 lb
Beans
Baked/Refried 9 10 lb can
Chicken - Breasts, Legs, Thighs 20 15 lb
Turkey, Frozen
Breasts (2) 90 6 - 7 lb each
Hot Dogs 3 80 - 100
SEAFOOD
Clams
Frozen 10 - 12 3 dozen
Fresh, Cherrystone 5 - 6 3 dozen
King Crab, Frozen
Part No. 10079R5 14 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
PRODUCT TIMER SETTING
(Minutes)
WEIGHT PER PAN
Claws 4 2 ½ lb
Legs 4 - 6 4 ½ lb
Shrimp, Frozen, 10 per lb 5 4 lb
Lobster Tail, Frozen 6 10 lb
Lobster, Live, 10" - 12" 5 4 per pan
Scallops, Fresh 4 3 lb
Scrod Fillets, Fresh 3 - 5 4 lb
VEGETABLES
Asparagus Spears
Frozen 10 - 12 3 dozen
Fresh 5 5 lb
Beans
Green, 2" Cut, Frozen/Fresh 6 5 lb
Lima, Frozen 8 5 lb
Broccoli
Spears, Frozen 8 4 lb
Spears, Fresh 6 5 lb
Florets, Frozen 6 5 lb
Carrots
Baby Whole, Frozen 8 7 lb
Crinkle Cut, Frozen 7 - 8 4 lb
Sliced, Fresh 11 9 lb
Cauliflower, Florets
Frozen 6 4 lb
Fresh 7 - 8 5 lb
Part No. 10079R5 15 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
PRODUCT TIMER SETTING
(Minutes)
WEIGHT PER PAN
Corn
Yellow Whole Kernel, Frozen 5 5 lb
Cobbettes, Frozen 8 27 ears
Corn-on-Cob, Fresh 10 - 12 18 ears
Peas, Green 6 5 lb
Potatoes, Whole Russet 55 40 lb
Zucchini, Slices 8 10 lb
Canned Vegetables 6 10 lb can
Frozen Mixed Vegetables 6 - 7 5 lb
Part No. 10079R5 16 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
4.0 CLEANING
CAUTION: Do not use cleaning agents that are corrosive.
WARNING: Disconnect the power supply to the appliance before
cleaning or servicing.
At the end of each day, or between cooking cycles if necessary...
Turn main power switch(es) OFF.
Remove pans and racks from compartment and wash in sink.
Wash compartment interior with clean water. Never use steel wool or abrasive scouring pads
as they will scratch and ruin the general surface appearance of the steamer.
Use warm soapy water with a cloth or sponge to clean the exposed bead of the door gasket.
Rinse with warm clear water and wipe dry with a dry cloth.
Wipe surfaces which touch the door gasket with a cloth or sponge and warm soapy water.
Rinse with warm clear water and wipe with a dry cloth. CAUTION: Do not allow the door
gasket to come in contact with food oils, petroleum solvents, or lubricants. Wipe all
solids away from the drain openings in the compartments to prevent clogging.
Remove drain screens from inside compartment drains. Using a plastic bottle brush and mild
detergent, clean inside the drain opening ensuring there is no food residue or blockage. Clean
the drain screen and replace in its original position.
Leave the door slightly open when the steamer is not in use to allow the inside to dry out.
Weekly, or more often if necessary...
Clean exterior with a damp cloth and polish with a soft dry cloth. Use a non-abrasive cleaner to
remove discolourations.
Part No. 10079R5 17 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
GUIDELINES FOR MAINTAINING STAINLESS STEEL SURFACES
There are three things that can break down stainless steel and allow corrosion to develop:
1) Abrasion;
2) Deposits and water;
3) Chlorides.
Avoid rubbing with steel pads, wire brushes, or scrapers that can leave iron deposits on
stainless steel; instead, use plastic scouring pads or soft cloths. For stubborn stains, use
products such as Cameo, Talc, or Zud First Impression. Always rub parallel to polish lines or
with the grain.
Hard water can leave deposits that promote rust on stainless steel. Treated water from
softeners or certain filters can eliminate these mineral deposits. Other deposits from food or
lubrication must be properly removed by cleaning. Use mild detergent and non-chloride
cleaners. Rinse thoroughly. Wipe dry. If using chloride containing cleaners or sanitizers, rinse
repeatedly to avoid stainless steel corrosion. Where appropriate, apply a polish recommended
for stainless steel (such as Benefit or Super Sheen) for extra protection and lustre.
Part No. 10079R5 18 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
5.0 MAINTENANCE
REMOVAL OF SCALE DEPOSITS
WARNING: Read and follow instructions on the CLR bottle. Use
plastic or rubber gloves to avoid skin contact. If CLR comes in
contact with skin, rinse with clear water.
1. Drain steam generator tank by setting power switch to “OFF”. Set cooking timer to “OFF”.
2. Set power switch to “DE-LIME. This closes drain valve.
3. Unscrew plug in deliming port at rear of unit. Insert hose in delime fitting. Pour 28 ounces
of solution into generator slowly to avoid spillage. Remove hose. Screw plug into deliming
fitting so it seals tightly.
4. Turn power switch to “ON”.
5. Allow steamer to remain in ready cycle for 1 ½ hours then turn power switch to “OFF” and
allow generator to drain.
6. Flush cycle. Turn power switch to “ON”. When ready light comes on, switch to “OFF” to
drain generator. Repeat this step three times to completely flush generator.
7. Clean exterior and interior. Use a mild solution of soap and water. Rinse with clean water.
Dry with a soft clean cloth. Leave compartment door open when not in use.
8. Complete the above steps for each cooking compartment.
The steamer is now ready for use or turn off for overnight shutdown.
Part No. 10079R5 19 2018-11-27

INSTALLATION AND OPERATION MANUAL,
ELECTRIC CONVECTION STEAMER, SX-34EC, SX-55EC
6.0 TROUBLESHOOTING
WATER FLOWS INTO COOKING COMPARTMENT:
1. Probes not sensing water, thereby not operating fill solenoid.
2. Scale build-up on operating probe inside generator.
3. Water fill solenoid valve is not closed. Check for scale or foreign particles lodged in
diaphragm or core tube of valve.
These problems are an indication of severe harmful water conditions which should be corrected
immediately to avoid damage to the components and performance of the steamer.
DOOR LEAKS:
1. Check for damage to door gasket.
2. Clogged compartment drain or plumbing.
WATER ACCUMULATES IN THE COMPARTMENT:
1. Compartment drain clogged.
WATER FLOWS INTO DRAIN DURING SHUTDOWN:
When steamer is shut down and cold water is running continuously into the open drain, either or
both solenoid valves did not close when steamer was turned off.
1. Disassemble solenoid valve(s) and examine for scale or foreign particles lodged in
diaphragm or core tube.
2. Clean valve(s) thoroughly and reassemble, or replace valve(s).
WATER NOT BEING SUPPLIED TO GENERATOR:
1. Water supply is “OFF”.
2. Supply water pressure too low.
Part No. 10079R5 20 2018-11-27