Blodgett Electric Steamer SB 6E User Manual

SB-6E, SB-10E and SB-16E  
CONVECTION STEAMER ON AN ELECTRIC BOILER BASE  
INSTALLATION – OPERATION MAINTENANCE  
BLODGETT OVEN COMPANY  
44 Lakeside Avenue, Burlington, Vermont 05401 USA Telephone (800) 331-5842, (802) 860-3700 Fax: (802) 864-0183  
S00047 Rev B (12/04)  
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TABLE OF CONTENTS  
DESCRIPTION  
PAGE  
Important Notes ............................................................................................................. 2  
1.0 Service Connections .............................................................................................. 4  
2.0 Installation Instructions ........................................................................................... 5  
3.0 Operating Instructions ............................................................................................ 6  
4.0 Periodic Maintenance ........................................................................................... 10  
5.0 Troubleshooting ...................................................................................................... 14  
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1.0 SERVICE CONNECTIONS  
ELECTRICAL CONNECTION: 1/2" conduit connection to controls. Rating to be as specified on data plate.  
COLD WATER: 3/8" O.D. tubing at 25-50 PSI(170-345 kPa)  
S
STEAM TAKE-OFF CONNECTION: 3/4"IPS optional to operate adjacent equipment.  
DRAIN: 2"IPS piped to open floor drain. No Solid Connection.  
WATER QUALITY STATEMENT  
Water quality is the major factor affecting the performance of your appliance. If you are unsure of water quality, consult a  
local water treatment specialist and have the water analyzed. Your water supply must be within these general guidelines:  
Total dissolved solids  
Total alkalinity  
Silica  
Chlorine  
pH Factor  
Less than 60 PPM  
Less than 20 PPM  
Less than 13 PPM  
Less than 1.5 PPM  
7.0-8.5  
Water which fails to meet these standards should be treated by installation of water conditioner.  
FAILURE OR MALFUNCTION OF THIS APPLIANCE DUE TO POOR WATER QUALITY IS NOT COVERED UNDER WARRANTY.  
ELECTRICAL CHARACTERISTICS  
Available kW  
STD.  
AMPS PER LINE  
MODEL  
SB-6E  
OPT.  
42  
kW  
24  
36  
42  
48  
PHASE  
208V  
66.6  
99.9  
116.6  
N/A  
220V  
63  
240V  
57.8  
86.6  
101  
380V  
36.5  
54.7  
63.8  
72.9  
415V  
33.4  
50.1  
58.4  
66.8  
480V  
28.9  
43.3  
50.5  
57.7  
600V  
23.1  
34.6  
40.4  
46.2  
24  
36  
42  
3
3
3
3
SB-10E  
SB-16E  
42  
94.5  
110.2  
126  
48  
115.5  
36 [914]  
DIMENSIONS ARE IN INCHES [MM]  
24 [610]  
S
18 [457]  
18 [457]  
(36" CABINET)  
8.75 [222]  
2.75 [70]  
S
4.5 [114]  
3.5 [89]  
3.5 [89]  
2.5 [64]  
2.5 [64]  
28 [711]  
23 [584]  
S
16.75 [425]  
8.75 [222]  
6 [152]  
5.75 [146]  
0 [0]  
SB-6E & SB-10E TOP VIEW  
SB-16E TOP VIEW  
REAR FLANGED FOOT DETAIL  
2 EQUALLY SPACED Ø7/16" [11mm] HOLES ON 2.5 [63] B.C.  
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2.0 INSTALLATION INSTRUCTIONS  
Ideally an exhaust system should be located directly above the appliance to exhaust  
steam and heat generated by the appliance.  
1. Set the unit in place and level using a spirit level.  
2. Ascertain that a floor drain (open gap) is convenient to the appliance drain.  
3. Mark hole locations on floor through anchoring holes provided in flanged adjustable  
feet.  
4. Remove appliance and drill holes in locations marked on floor and insert proper  
anchoring devices.  
5. Set unit back in position and re-level left to right and front to back.  
6. Bolt and anchor appliance securely to the floor.  
7. Seal bolts and flanged feet with Silastic or equivalent compound.  
8. Make service connections as indicated.  
WARNING: Electrical and grounding connections must comply with  
applicable portions of the National Electrical Code and/or other local  
electrical codes.  
WARNING: Disconnect electrical power supply and place a tag on  
the disconnect switch to indicate that you are working on the circuit.  
Use copper wire suitable for at least 200 degrees Fahrenheit (90 degrees Celsius). The  
steamer must be grounded. The wiring diagram is located on the inside right hand panel  
as you face the steamer.  
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3.0 OPERATING INSTRUCTIONS  
BOILER SECTION  
Electrically powered steam generators are available with standard boiler controls or  
ASME CSD-1 compliant controls. In addition to the ON/OFF power switch and indicator  
pilot light on the standard controls, the CSD-1 controls come with four more indicator  
pilot lights and a “Reset” switch. Follow the appropriate instructions for each.  
Start-up Procedure, Standard Controls  
1. Turn on water and power supply to appliance.  
2. Close the manual blowdown valve if the units is not equipped with the optional  
automatic blowdown valve.  
3. Open door of cabinet and turn on Power Switch. Pilot light will come ON and water  
will begin to enter boiler. Once water level has reached the proper operating level as  
indicated on water gauge glass the heating elements will be energized and heat the  
water. When steam pressure has reached 11 psi the elements will de-energize and  
cycle on and off between 9 - 11 psi. The boiler is now ready for steam generation.  
Start-up Procedure, CSD-1 Controls  
1. Turn on water and power supply to appliance.  
2. Close the manual blowdown valve if the units is not equipped with the optional  
automatic blowdown valve.  
3. Open cabinet door and turn "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  
(red) “Low Water” pilot will come on for approximately 10 seconds and then the  
(amber) pilot light will come.  
4. Press the “Reset” switch to begin boiler operation. The “Standby” pilot light will go off  
and the boiler will begin operation. When steam pressure has reached 11 psi the  
elements will de-energize and cycle on and off between 9 - 11 psi. The boiler is now  
ready for steam generation.  
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3.0 OPERATING INSTRUCTIONS (Continued)  
Normal Boiler Operating Cycle  
Water Fill Cycle  
On the initial filling of the boiler, units equipped with CSD-1 controls require that the  
“Reset” switch be pressed to initialize the safety lockout circuit. Once the water in  
the boiler has reached 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  
and maintain safe water level in the boiler.  
Firing Cycle  
The elements are operated by pressure sensing devices. On initial operation, the  
boiler should reach 11 psi in approximately 15 minutes. At this point the operating  
pressure switch will open, de-energizing the elements. When the pressure drops to  
9.0 psi, the pressure switch closes, energizing the elements.  
Condensing Drain, (Optional)  
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, (Optional)  
If the unit has an automatic blowdown valve, it is activated when the main power  
switch is turned “ON”. The boiler will drain when the main power switch is turned  
"OFF.”  
Safety Lockout Conditions  
High Temperature Condition, Standard Controls  
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. As the temperature  
returns to a safe level, normal boiler operation will resume.  
High Temperature Condition, CSD-1 Controls  
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 switch to a state of  
lockout. The “Temperature” pilot light (red), and the “Standby” pilot (amber), will come  
on.  
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3.0 OPERATING INSTRUCTIONS (Continued)  
High Pressure Condition, CSD-1 Controls  
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 switch to a state of lockout.  
The “Pressure” pilot light (red), and the “Standby” pilot (amber), will come on.  
Should this device fail to operate, the safety relief valve will open.  
Low Water Condition, Standard Controls  
A low water safety cut off is supplied with the boiler. Should the water level fall  
below normal operating levels, the boiler will shut down. If the water level is returned  
to a safe level, normal boiler operation will resume.  
Low Water Condition, CSD-1 Controls  
A second low water safety cut off is supplied with the boiler. Should the water level  
fall below normal operating levels, the boiler will shut down and switch to a state of  
lockout. The “Low Water” pilot light (red), and the “Standby” pilot (amber) will come  
on.  
SHUT DOWN  
Turn off power switch, open manual drain valve. If unit is equipped with automatic  
blowdown valve, it will open and drain the boiler.  
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COOKER SECTION  
CAUTION: Live steam and accumulated hot water in the compartment may  
be released when the door is opened.  
Start-up procedures for your steamer must be completed once daily prior to operation  
(see instruction plate or above for boiler start up procedures). With ready pilot light on,  
preheat steamer compartment for one minute when the steamer is to be first used for the  
day or whenever the compartment is cold.  
1. Close compartment doors and set timer to “1 minute”.  
2. When buzzer sounds, set timer to the “OFF” position.  
3. Steamer is now ready for cooking.  
4. With cooking compartment preheated and ready pilot light on, place pans of food to  
be cooked into compartment and shut door.  
5. Set timer to cooking time desired. Cooking cycle may be interrupted at any time by  
opening door and resumed again by closing door.  
6. When buzzer sounds, it indicates the end of the cooking cycle and that no more  
steam is entering the compartment. Cooking pilot light will go off and ready pilot light  
will come on. Buzzer must be shut off by turning the timer to its off position.  
CAUTION: An obstructed drain can cause personal injury or property  
damage.  
Frequently check that the compartment drain and plumbing is free of all obstructions.  
Never place food containers, food or food portion bags in the cooking compartment in  
such a way that the compartment drain becomes obstructed.  
Each compartment is equipped with a removable drain screen. Frequently check the drain  
screen for accumulation of food particles. Should food particles accumulate against, or clog  
the drain screen, remove it, clean it thoroughly and then replace it in its original position.  
SHUT DOWN  
1. To shut down cooking compartment, set timers to their OFF position and leave doors  
slightly open.  
2. At the end of the day, the steam supply must be shut off. Open the door of cabinet  
base and turn off power switch. Open manual drain valve. If unit is equipped with  
automatic blowdown valve, it will open and drain the boiler.  
If unit is equipped with CSD-1 controls also refer to separate manual supplied with unit.  
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4.0 PERIODIC MAINTENANCE  
Never spray water into electric controls.  
NOTICE: Contact the factory, the factory representative or local service company to perform  
maintenance and repairs. Refer to warranty terms.  
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: Scald Hazard. Protect yourself. When flushing control, hot water  
and steam will flow out of the drain.  
CAUTION: Disconnect the power supply during cleaning or servicing.  
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CLEANING  
1. Keep exposed cleanable areas of unit clean at all times.  
2. Thoroughly wash oven cavities, door liners, and pan racks at the end of each day or  
as required with a mild detergent and water to prevent bacterial growth and odours.  
3. 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.  
4. Wash gasket sealing surface with mild detergent to remove harmful food acids and  
rinse.  
5. Water level control should be opened daily to blow down sediment and scalant.  
6. Observe that the water in gauge glass is clean and clear. Extreme murkiness in  
water indicates inadequate water quality.  
7. Safety valve should be tripped during operation once a week to assure that it  
functions properly.  
8. Keep all exposed cleanable areas of unit clean at all times. DO NOT GET WATER  
IN ELECTRICAL BOX OR ANY ELECTRICAL COMPONENTS.  
CAUTION: Take extra caution when blowing down water level control or  
tripping safety valve as extreme hot water and live steam are present.  
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ADJUSTMENTS  
At least twice a year have an authorized service person clean and adjust the unit for  
maximum performance.  
DESCALING BOILER  
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.  
1. With boiler empty, close manual blowdown valve. If appliance is equipped with  
Automatic Blowdown, turn water supply OFF to appliance. Turn power switch ON.  
This will energize and close the Blowdown valve.  
2. Remove 3/4" pipe plug from fitting on left front of boiler.  
3. Insert appropriate hose or tube through fitting and pour in (½) half gallon (U.S.) of  
CLR Descaling Solution or use the Optional Deliming Assembly DPA-1 available  
from your dealer.  
4. Replace 3/4" pipe plug securely.  
5. Open water supply to appliance allowing water to fill boiler to required level.  
6. Let appliance cycle. Allow two hours for descaling and cleaning. DO NOT TURN  
ON STEAM to the compartments.  
7. Open both the blowdown and low water level control valves for complete drainage  
and then close both valves.  
8. Turn appliance switch ON. When boiler is completely filled turn power switch OFF.  
This will rinse and drain boiler. Appliance with manual Blowdown valve must be  
opened to drain.  
9. Complete Step 8 twice to assure boiler is completely rinsed.  
10. Appliance is now ready for use.  
12  
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TO CALIBRATE PRESSURE SWITCHES  
NOTE: Pressure switches are factory set. Calibration is only required if pressure  
switches are replaced or if adjustment is required.  
Pressure switch range is from 1 to 15 psi.  
Adjust all settings to maximum on high signal adjustment screw.  
Adjust in the following sequence:  
- High limit pressure switch.  
- Override pressure switch.  
- Operating pressure switch.  
- Turning screw clockwise to increase, counterclockwise to decrease pressure.  
- Use relief valve to release pressure from boiler for setting adjustments.  
1. HIGH LIMIT PRESSURE SWITCHES  
Allow pressure to build until unit shuts off. This should occur at 15 psi. Set the high  
signal to switch at 14.5 psi on the gauge and the low signal to 13.0 psi.  
2. OVERRIDE PRESSURE SWITCHES  
Allow pressure to increase to 13 psi. Set the high signal to switch at 13 psi on the  
gauge and the low signal to 11 psi.  
3. OPERATING PRESSURE SWITCHES  
Set the high signal to switch at 11 psi on the gauge and the low signal to 9 psi.  
4. Release pressure in boiler to below 9 psi. Elements will come on. Once pressure  
has reached 11 psi, elements will shut off. Repeat this process several times to  
make sure elements come on at 9 psi and shut off at 11 psi.  
Once completed, pressure switches have been calibrated.  
Should your unit not have the High Limit pressure switch, start procedure at Override  
pressure switch.  
SERVICE  
Contact your local authorized service office for any repairs or adjustments needed on  
this equipment.  
13  
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5.0 TROUBLESHOOTING  
DOOR LEAKS  
1. Check for damage to door gasket.  
WATER ACCUMULATES IN THE COMPARTMENT  
1. Compartment drain screen clogged. Remove and clean thoroughly and then  
replace.  
WATER NOT BEING SUPPLIED TO BOILER  
1. Water supply is “OFF”.  
2. Defective water fill solenoid.  
3. Water level control clogged or defective, unable to operate fill valve.  
4. Check drain valve is closed. Also check that water level control valve is closed.  
5. Supply water pressure too low.  
AUTOMATIC BLOWDOWN VALVE DOES NOT DRAIN  
1. Defective Blowdown valve.  
2. Heat exchanger build up of scalant clogging drain lines and valve.  
BOILER ACHIEVES PRESSURE SLOWER THAN NORMAL  
a) Heavy build up of lime on elements.  
b) Loose element connections.  
SAFETY VALVE BLOWS  
1. Defective safety valve.  
2. Pressure too high. Pressure switch requires adjustment (lower) or may be defective.  
14  
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