Middleby Marshall PS520 IV. Normal Operation STEP-BY-STEP, Daily Startup Procedure

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SECTION 3

OPERATION

IV. NORMAL OPERATION - STEP-BY-STEP

A.Daily Startup Procedure

1.Check that the circuit breaker/fused disconnect is in the on position.

7.Wait for the oven to heat to the setpoint temperature. Higher setpoint temperatures will require a longer wait. The oven can reach a temperature of 500°F (232°C) in approximately 15 minutes.

2.Turn the "BLOWER"

() switch to the “ON” ("I") position.

3.Turn the "CONVEYOR" () switch to the “ON” ("I") position.

4.If necessary, adjust the conveyor speed setting by pressing the or pushbuttons on the con- veyor speed controller to change the displayed bake time.

5.Adjust the temperature controller to a desired set temperature, if neces- sary.

Press the Set Point and Unlock keys at the same time. Wait for the "SET PT" light to turn on.

Press the Up Arrow and Down Arrow Keys as necessary to adjust the set- point.

or

wait

+ for

or

8. (Optional) Press the Tem-

 

perature ( ) key to show

 

the Actual Temperature

wait

in the display, and wait

for

for the "ACTUAL TEMP"

light to turn on. This al-

 

lows you to monitor the

 

oven temperature as it

 

rises to the setpoint.

 

9.Allow the oven to preheat for 10 minutes after it has reached the set point temperature.

B.DAILYSHUTDOWNPROCEDURE

1. Turn the "HEAT" (

) and

+

"BLOWER" (

) swit-

ches to the "OFF" ("O")

 

position.

Note that the

 

blowers will remain in op-

 

eration until the oven has

 

cooled to

below

200°F

 

(93°C).

 

 

 

2. Make certain that there are no products left on the conveyor inside the oven. Turn the "CON- VEYOR" () switch to the "OFF" ("O") position.

3.After the oven has cooled and the blowers have turned to the “OFF” or “O” position, switch the circuit breaker/fuse disconnect to the “OFF” or “O” position.

6. Turn the "HEAT" ( ) switch to the "ON" ("I") position, and wait for the "HEAT ON" light to turn on.

wait for

CAUTION

In case of power failure, turn all switches to the “OFF” ("O") position and remove the product. After the power has been restored, perform the normal startup procedure. IF THE OVEN WAS SWITCHED OFF FOR LESS THAN 5 MINUTES, WAIT FOR AT LEAST FIVE MINUTES BEFORE RESTARTING THE OVEN.

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Contents Owners operating Page Middleby Marshall Table of Contents Section Description Model IdentificationPS520 Series Oven Specifications Series PS520 Electrical SpecificationsThis Manual Must Be Kept For Future Reference PS520-Series Oven Components Locations II. Component Function Cooling Fan Blank Plates two sizes and an Air Finger F2. Blank PlatesSection Installation UnloadingParts List for Series PS520 Electric Oven Installation KIT Single and Double Stack OvensModel PS520 Single Oven Dimensions Model PS520 Double Oven Dimensions Model 520 Triple Oven Dimensions II. Ventilation Guidelines Electric Supply to be Provided by Customer CircuitbreakerIV. Electric Supply for Electrically Heated Ovens 10. Typical Electric Oven Data PlateSection Installation Section Operation Control FunctionsII. Component Information and Location Figures 3-1 Measuring Conveyor Speed ConveyorStartup Procedures Daily Startup III. STEP-BY-STEP OperationControl Panel Daily Startup Procedure IV. Normal Operation STEP-BY-STEPSP Lock Quick Reference Troubleshooting SymptomSection Maintenance Maintenance Daily ExteriorCooling Fan Conveyor Belt FigureII. Maintenance Monthly Removing Conveyor From Oven For CleaningAir Fingers Disassembly For Cleaning T1 T2 T3 B1 B2 B3 Reassembly of Air Fingers 12. Standard Lower FingerExtended Lip Tab on Outer Plate Flange Finger Manifold Section Maintenance Reinstall End Plugs Conveyor Reassembly Into Oven Checking Conveyor Belt TensionConveyor Belt Link Removal Attaching Drive Chain III. Maintenance Every 3 Months IV. Maintenance Every 6 MonthsImportant Notices Electrical TerminalsKEY Spare Parts KIT PS520-SERIES Electric Oven KEY Spare Parts KIT FigureSection Troubleshooting Section Troubleshooting Parts List English Single Oven Exploded View English Relay Panel English Blower Assembly English Control Panel English Single Conveyor Section Parts List Section Electrical Schematics Wiring Diagram, E380-480V 50/60/1, PS520 Wiring Diagram, E230-240V CE PS520/1820S Wiring Diagram, E380-400V CE PS520/1820S Section Electrical Schematics