Middleby Cooking Systems Group PS520E III. STEP-BY-STEP Operation, Important Notice

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SECTION 3

OPERATION

WARNING

OVEN MUST BE KEPT CLEAR OF

COMBUSTIBLES AT ALL TIMES

III. STEP-BY-STEP OPERATION

A. Start-up Procedure

Daily Start-up

1.Turn the BLOWER switch (Figure 3-6) to the “ON” or “I” position. This starts the main blower fan and the cooling fans. This blower circulates air through the air fingers and must stay on during the cooking or baking process.

2.Check to see if the cooling fans (see Figure 4-1 page 13) are operating when the blower switch (see Figure 3-6) is turned “ON” or “I”. The cooling fans cool the control components and blower motor. The cooling fans, located at the rear of the oven blows air into and through the cabinet. Air is exhausted through the front of the cabinet and also out the front of the oven. Refer to Daily Maintenance Section for fan intake checking procedure.

IMPORTANT NOTICE

The cooling fan operates when the BLOWER switch is turned “ON” or “I”. It must operate to keep the control console below 1400F (600C)

3.Turn the CONVEYOR switch (see Figure 3-6) to the “ON” or “I” position. This starts the conveyor belt moving through the oven. Set the conveyer speed for the desired baking time. Refer to the following Procedures E, F and G.

4.Set the temperature controller to the desired baking temperature.

NOTE: For complete temperature controller operation instructions refer to Step C.

5.Turn the HEAT switch (see Figure 3-6) to the “ON” or “I” position. This completes a circuit to supply electric power to the electric heating system.

6.Oven will reach baking temperature of 5000F (2320C) in approximately 20 minutes. Allow the oven to cycle for 30 minutes after it has reached desired baking temperature. The oven is now ready for baking.

POWER FAILURE

In case of power failure, turn off all switches and remove product. After power has been reestablished follow normal start-up procedure.

B. Shutdown Procedure

1. Turn the BLOWER and HEAT switches to “OFF” or “O”.

NOTE: The blowers will remain on until the oven temperature cools down to 2000F (930C) at which time they will stop automatically.

2.Make certain that there are no products left on the conveyor inside the oven. Turn the CONVEYOR switch to “OFF” or “O”

Figure 3-6. Control Panel

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Contents Installation Page A. Only IiiTable of Contents Section Description Model IdentificationPS520 Series Oven Specifications This Manual Must Be Kept For Future ReferenceII. Component Function Section Installation UnloadingInstallation KIT Single and Double Stack OvensModel PS520 Single Oven Dimensions II. Ventilation IV. Electric Supply for Electrically Heated Ovens 11. Junction Connection Box Section Operation Control FunctionsDoor Safety Switch Blower SwitchHeat Switch Temperature ControllerConveyor Measuring Conveyor SpeedSee -4 Start-up Procedure Daily Start-up Power FailureShutdown Procedure III. STEP-BY-STEP OperationDaily Shutdown Procedure Daily Start-up ProcedureIV. Normal Operation STEP-BY-STEP Overtemp Quick Reference Troubleshooting SymptomSection Maintenance Maintenance Daily ExteriorImportant Note Conveyor Belt FigureII. Maintenance Monthly PrecautionsRemoving Conveyor From Oven For Cleaning Part#QuantitySection Maintenance Air Fingers Disassembly For cleaning Standard FingersReassembly of Air Fingers 12. Standard Lower FingerExtended Lip Tab on Outer Plate Flange Finger Manifold 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 MonthsElectrical Terminals VentilationPS520-SERIES Electric Oven KEY Spare Parts KIT Description QuantitySection Troubleshooting E208-240V 50/60/1 E380-480V 50/60/1 E230-240V CE, 1Ph E380-400V CE, 1Ph E380-400V CE, 3Ph
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