CROWN OB-4-2-54-E Oyster Bars Electric Boilers Instruction Manual

: October 30, 2023
: CROWN

CROWN OB-4-2-54-E Oyster Bars Electric Boilers

Product Information

The Oyster Bars, and Electric Boilers are commercial-grade equipment manufactured by Crown Food Service Equipment, a Middleby Company. The product comes in three models: OB-2-2-27-E, OB-3-2-40-E, and OB-4-2-54-E under the Model OB-E series. The equipment is designed to be used for commercial purposes only and not for household use. The product is equipped with safety features and symbols that alert the user to potential hazards or unsafe practices that could result in injury, product damage, or property damage.

Product Usage Instructions

Before installing or operating the Oyster Bars, and Electric Boilers, make sure that everyone involved in their operation is fully trained and aware of precautions. Accidents and problems can be caused by failure to follow fundamental rules and precautions. The followings are the safety precautions and important notes for installation and operation:

Read the installation, operating, and maintenance instructions thoroughly before installing, operating, or servicing this equipment.
Obey all safety messages to avoid possible injury or death.
Operating, testing, and servicing should only be performed by qualified personnel.
Contact the factory, the factory representative, or the local service company to perform maintenance and repairs.
Do not attempt to operate this unit in the event of power failure.
Use the equipment as specified on the data plate.
Connect the drain to a 2IPS piped open floor drain with no solid connection.
Connect the cold water to a 3/8 O.D. tubing at 25-50 PSI(170-345 kPa).

It is highly recommended that this manual be read thoroughly, and all instructions be followed carefully. Retain this manual for future reference.

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.

CROWN FOOD SERVICE EQUIPMENT
A Middleby Company 70 Oakdale Road, Downsview (Toronto) Ontario, Canada, M3N 1V9 Telephone: 919-762-1000 www.crownsteamgroup.com

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 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
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.

CAUTION
Operating, testing, and servicing should only be performed by qualified personnel.

NOTICE
Contact the factory, the factory representative or the local service company to perform maintenance and repairs.

NOTICE
Do Not attempt to operate this unit in the event of power failure.

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

NOTICE
This manual should be retained for future reference.

SERVICE CONNECTIONS

CROWN-OB-4-2-54-E-Oyster-Bars-Electric-Boilers-FIG-1

SERVICE CONNECTIONS

ELECTRICAL CONNECTION: Field wiring electrical connection to be as specified on data plate.
DRAIN: 2”IPS piped to open floor drain. No Solid Connection.
COLD WATER: 3/8” O.D. tubing at 25-50 PSI(170-345 kPa)

DIMENSIONS

Model	Units	A	B	C	D	E	F	G	H	J	K	L	M
OB-2-2-27-E	in (mm)	27”

(686)

|

54”

(1372)

|

8.75”

(222)

|

8”

(203)

|

5.75”

(146)

|

4”

(102)

|

19.25”

(489)

|

4.75”

(121)

|

3.5”

(89)

|

4”

(102)

|

59.75”

(1518)

| 21.63”

(549)

OB-3-2-40-E| in (mm)| 40”

(1016)

| 34.63”

(879)

OB-4-2-54-E| in

(mm)

| 54”

(1372)

| 48.63”

(1235)

ELECTRIC CHARACTERISTICS AND CAPACITIES

Amps Per Line

Model| kW| Phase| 208V| 220V| 380V| 415V| 480V

OB

| 24| 3| 66.6| 63| 36.5| 33.4| 28.9
36| 3| 99.9| 94.5| 54.7| 50.1| 43.3
42| 3| 116.6| 110.2| 63.8| 58.4| 50.5

Model

| Capacity (per kettle)
---|---
US Quart| Liters
OB-2-2-27-E| 2 x 2| 2 x 2
OB-3-2-40-E| 3 x 2| 2 x 3
OB-4-2-54-E| 4 x 2| 2 x 4

WATER QUALITY STATEMENT
Water is the essential ingredient in steam equipment, water quality is the major factor affecting the performance of your appliance. Crown Steam Group offers a Comprehensive Water Treatment System which exceeds our minimum water requirements. Proof of installation and proper cartridges replacement is required for warranty coverage. Water supply to Crown Steam Group steamers must be within these guidelines.

Total dissolved solids………………….. …… Less than 60 PPM
Total alkalinity …………………………………. Less than 20 PPM
Silica ………………………………………………. Less than 13 PPM
Chlorine ……………………….Less than 1.5 PPM
pH Factor …………………….6.8 – 7.3

Water that does not meet these standards should be treated with the installation of Middleby’s Water Treatment System. Call 919-762-1000 if you have questions concerning your water meeting these parameters. *Failure or malfunction of this appliance due to poor water quality is not covered under warranty. Reference www.crownsteamgroup.com for complete warranty details and instructions.

INSTALLATION INSTRUCTIONS

General

Direct steam jacketed oyster cookers are pressure vessels of a double wall stainless steel construction forming a steam chamber (jacket) enveloping the bowl surface. Cookers are mounted on a modular cabinet base housing an electric boiler designed to ASME Code and approved as a steam heating boiler restricted to operation at a pressure not to exceed 15 psi. The electric boiler may be in a 27 inch, 40 inch or 54 inch cabinet base. Boilers are electrically rated as shown on page 4. All models are 2 quarts cooker capacity.

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. Before installing, verify the electrical rating agrees with the specification on the rating plate.

Location
Position the boiler in its installation location. Check that there are sufficient clearances to service the controls, door swing, etc. Also adequate clearance must be left for making the required supply and drain connections.
Allow enough space between any other piece of equipment or wall for service access. Service to the controls may be required on the left and/or right side panels of the cabinet.

Installation Codes and Standards
The appliance must be installed in accordance with:

In Canada:
Provincial and local codes, or in the absence of local codes, with the Canadian Electric Code, CSA C22.1 (latest edition). Copies may be obtained from the Canadian Standards Association, 178 Rexdale Blvd., Etobicoke, Ontario, Canada, M9W 1R3.

In the U.S.A.:
State and local codes, or in the absence of local codes, with the National Electrical Code, ANSI/NFPA-70 (latest edition). Copies may be obtained from The National Fire Protection Association, Batterymarch Park, Quincy, MA, USA, 02269.

Leveling and Anchoring the Cabinet

Place the appliance in the installation position.
Place a carpenter’s level on top of the appliance and turn the adjustable feet to level side-to-side and front-to-back.
Mark hole locations on the floor through the anchoring holes provided in the rear flanged adjustable feet.
Remove the appliance from the installation position and drill holes in locations marked on the floor. (See Installation Diagram on page 4.) Insert proper anchoring devices (not supplied).
Place the appliance back in the installation position.
Place carpenter’s level on the top appliance and re-level side-to-side and front-to-back.
Bolt and anchor the appliance securely to the floor.
Seal bolts and flanged feet with Silastic or equivalent compound.

ELECTRICAL CONNECTIONS

WARNING
Electrical and grounding connections must comply with the applicable portions of the National Electrical Code and/or other local electrical codes.

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

IMPORTANT
When making electrical connections, use copper wire suitable for at least 200 °F (90 °C). The appliance must be grounded in accordance with the National Electrical Code or applicable local codes. The wiring diagram is located on the inside of the right panel.

Exhaust Fans and Canopies
Canopies are set over ranges, ovens, kettles, etc. for ventilation purposes. It is recommended that a canopy extend 6” past the appliance and be located 6 feet 6 inches from the floor. Filters should be installed at an angle of 45 degrees or more with the horizontal. This position prevents the dripping of grease and facilitates collecting the run-off grease in a drip pan, usually installed with the filter.

Plumbing Connections

WARNING
Plumbing connections must comply with applicable sanitary, safety, and plumbing codes.

Water Supply Connection
The incoming cold water supply connection, at the rear of the boiler cabinet, requires 3/8” tubing and water pressure of 25 – 50 psig. A manual shut-off valve must be provided convenient to the boiler; this valve should be open when the boiler is in operation.

IMPORTANT
If your equipment was supplied with split water lines and a filter, connect the filter system to the connection marked “BOILER FEED” only. Make a second connection the “CONDENSER FEED” from a cold and unfiltered water supply.

NOTICE
FAILURE OR MALFUNCTION OF THIS APPLIANCE DUE TO POOR WATER QUALITY IS NOT COVERED UNDER WARRANTY. SEE THE WATER QUALITY STATEMENT (PAGE 4).

Drain Connection
The boiler drain (2” IPS) should be piped to a floor drain near the boiler. There should be no solid drain connection; an “open gap” between the boiler and the floor drain is required.

OPERATION

For CSD-1 equipped boilers, see this section for CSD-1 Optional Feature for proper operating instructions.

Boiler Controls (Inside Cabinet)

Main Power Switch

ON fills the boiler tank and turns the boiler heaters on. You should allow 20 minutes to fill the tank and generate steam.
OFF shuts off the boiler heaters and opens the Automatic Blowdown Valve, emptying the boiler tank and releasing water and steam to the drain. This should be done daily to remove sediment, lime, or scale.
Pilot Light – Indicates main power is ON.
Boiler Pressure Gauge – Should read 9 -11 psi during operation; 0 psi during shutdown.
Water Level Sight Glass – Observe the level of water and water quality in the boiler. Murkiness in the water indicates inadequate water quality; the owner must supply proper water to the boiler (see Water Quality Statement on page 4).
Water Level Control – While the boiler is ON, briefly open the water level control valve once a day to remove any sediment that might accumulate. (See page 8 for detailed instructions.)
Safety Valve – This valve will release (pop off) if the boiler has too much pressure. Once a week, this valve should be tripped during operation to make sure it functions properly.

Operation of the Boiler
Turn on the water and power supply. Open the cabinet door and turn the main power switch ON. The pilot light ignites and water begins to fill the boiler – observe the water gauge sight glass to verify that the proper water level is reached.
Once the proper water level is reached, the heaters begin to heat the water. Heaters require about 15 minutes to begin steam generation. The boiler pressure gauge in the cabinet should indicate steam pressure in a range of 9 to 11 psig.

Shut Down
Turn the Main Power Switch OFF: Open manual drain valve. If unit is supplied with Automatic Blowdown Valve, it will open, draining the boiler and releasing hot water and steam to the drain.

START-UP PROCEDURE

Close the manual blowdown valve.
Open the cabinet door and turn the “ON” power switch. The green pilot light will come “ON.” Water will begin to enter the boiler. When enough water has entered the boiler, the (amber) “STANDBY” pilot light will come on.
Press the “RESET” switch to begin boiler operation. The “STANDBY” pilot light will go off and the boiler will begin operation.

Normal Boiler Operating Cycle

Water Fill Cycle
On the initial filling of the boiler, the reset switch must be activated to initialize the safety lockout circuit. Once the water in the boiler has reached the proper level, the level control will stop the flow of water to the boiler. As water is consumed in the production of steam, the level control will supply additional water to the boiler.

Firing Cycle
The elements are operated by pressure-sensing devices. On initial operation, the boiler should reach 14 psi in approximately 15 minutes. At this point, the operating pressure switch will open, de-energizing the elements. Thereafter the operating pressure switch will cycle the elements between 9 and 11 psi boiler pressure.

Condensing Drain
A thermostat is located in the drain assembly and is activated by the temperature of steam. The thermostat operates the cooling solenoid, supplying water to the drain to condense the steam.

Automatic Blowdown Valve
If the unit has an automatic blowdown valve, it is activated when the main power switch is activated. The boiler will be drained should the main power switch be turned “OFF.”

Safety Lockout Conditions

High-Temperature Condition
A high-temperature safety device is installed on the boiler. Should the temperature exceed the limit of this device, the boiler will be shut down and put in a state of lockout. The “TEMPERATURE” pilot light (red), and the “STANDBY” pilot light (amber), will come on.

High-Pressure Condition
A high-pressure safety switch is installed on the boiler. Should the pressure exceed the limit of this device, the boiler will be shut down and put into a state of lockout. The “PRESSURE” pilot light (red), and the “STANDBY” pilot light (amber), will come on. Should this device fail to operate, the safety relief valve will open.

Low Water Condition
A second low water safety cut-off is supplied with the boiler. Should the water level fall below normal operating levels, the boiler will be shut down and put into a state of lockout. The “LOW WATER” pilot light (red), and the “STANDBY” pilot light (amber) will come on.

Periodic Maintenance

WARNING
Disconnect the unit from the power supply before cleaning or servicing the appliance.

NOTICE
Contact the factory, the factory representative or a local service company to perform maintenance and repairs should the appliance malfunction. Refer to warranty terms.

IMPORTANT INSTRUCTIONS
Be sure to flush your boiler water level control daily. Failure to follow this procedure can cause the control to malfunction resulting in serious boiler damage.

The Boiler Water Level Control installed on your boiler requires periodic maintenance. As boiler water circulates into the float chamber, sand, scale and other sediment may be deposited in the float chamber. While the chamber has been designed with a large accumulation bowl, it is necessary to flush the sediment from the chamber by blowing down the control so that the accumulation of sediment does not interfere with the movement of the float in the control. Control must be flushed at least once a day.

CAUTION

Protect yourself. When flushing control, hot water, and steam will flow out of the drain. When flushing control, note the water level in gauge glass, allow the boiler to fill if necessary, and also to come up to temperature. Before flushing control, note that the water level in gauge glass is within the operating range and the boiler pressure is at least 6 psi. While the boiler is being operated, open the blowdown valve at the bottom of the control by rotating the handle counterclockwise about 1/4 turn to fully open the valve. Opening the blowdown valve also checks the cut-off operation. The float should drop shutting steam off, hot water and steam will flow out the drain flushing away sediment.

CAUTION
If the heater does not shut off during a blowdown, immediately discontinue use of the appliance and call for service. Continue draining water for about fifteen (15) seconds from control, until water is clean. Manually close valve. Recheck gauge glass. If the water level has dropped significantly, wait for the boiler to restore the water level and pressure and repeat if necessary.

Observe that the water in the gauge glass is clean and clear. Extreme murkiness in water indicates inadequate water quality.
The safety valve should be tripped during operation once a week to assure that it functions properly.
Keep all exposed cleanable areas of the unit clean at all times.

CAUTION
Take extra caution when blowing down the water level control or tripping the safety valve as extreme hot water and live steam are present.

Descaling Boiler

CAUTION
Improper use of this procedure may damage your appliance!

It is recommended that the boiler be checked every 90 to 120 days for scale build-up. Regular maintenance should be carried out at this time.

With the boiler empty, close the manual blowdown valve. If the appliance is equipped with Automatic Blowdown, turn the water supply to the appliance OFF. Turn the power switch ON. This will energize and close the blowdown valve.
Remove the 3/4” pipe plug from the fitting on the left front of the boiler.
Insert appropriate hose or tube through fitting and pour in (1/2) half a gallon (U.S.) of CLR Descaling Solution.
If available, use the Optional Deliming assembly DPA-1 available from your dealer.
Replace the 3/4” pipe plug securely.
Open water supply to appliance allowing water to fill the boiler to the required level.
Let the appliance cycle, allow two hours for descaling and cleaning. DO NOT TURN ON STEAM to attach appliances or to the upper compartment.
Open both the blowdown and low water level control valves for complete drainage. After the boiler drains, close both valves.
Turn the appliance switch ON. When a boiler is completely filled turn the power switch OFF. This will rinse and drain the boiler. Appliances with manual blowdown valves must be opened to drain.
Complete Step 8 twice to assure the boiler is completely rinsed.
The appliance is now ready for use.

Oyster Cooker Functioning Mode

Direct connected steam jacketed oyster cookers consist of a stainless steel bowl and a stainless steel jacket which envelopes 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 cooker 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. In the initial stages of the cooking process when the steam comes in contact with the cold cooker bowl surface it condenses and forms considerable amounts of water. A thermostatic steam trap is plumbed to the exit end of the cooker 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.

Cooker Operation

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

Cooker Operating Procedures

Fill the cooker with a product to the desired level.
Slowly turn the steam control valve ON to the full open position.
The water or food should boil for 3 – 4 minutes per gallon. If it does not, then incoming pressure should be checked to determine that it is adequate to operate the cooker efficiently.
Regulate the steam control valve depending on the type of food being prepared.
When food is cooked, turn off the steam, remove the food, and clean the cooker immediately to prevent residue from drying on the cooker bowl surface.

Cooker Preventive Maintenance

No preventive maintenance is required other than adhering to the Cleaning Procedure instructions.

Cleaning

WARNING

Never spray water into electric controls.

CAUTION

Do not use cleaning agents that are corrosive.

CAUTION

Live steam and accumulated hot water in the compartment may be released when the door is opened.

CAUTION

Disconnect the power supply during cleaning or servicing.

Your cooker should be cleaned immediately after each use.

Ensure that steam supply is OFF.
Pre-rinse inside of cooker thoroughly and tilt to remove any food particles.
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.
Tilt cooker and rinse thoroughly draining out detergent solution.

Troubleshooting

NOTICE
Contact the factory, the factory representative or local service company to perform maintenance and repairs. Refer to warranty terms.

NOTICE
At least twice a year have an authorized service person clean and adjust the unit for maximum performance.

Water Not Being Supplied to the Boiler

The water supply is “OFF”.
Defective water fills solenoid.
Water level control is clogged or defective, and unable to operate the fill valve.
Check drain valve is closed.
Supply water pressure is too low.

Automatic Blowdown Valve Does Not Drain

Defective Blowdown valve.
Heat exchanger build-up of scale clogging drain lines and valve.

Boiler Achieves Pressure Slower Than Normal

A heavy build-up of lime on elements.
Loose element connections.

Safety Valve Blows

Defective safety valve.
Pressure is too high. The pressure switch requires adjustment (lower) or may be defective.

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