PS520-Series Electric Ovens:English installation & operation manual PS520-Series OVENS Model PS520E PS520 Double ©2006 Middleby Marshall Inc. PS520 Single PS520 Triple Part No.
WARNING FOR YOUR SAFETY, DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. 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.
Model No.________________________ Serial No._______________ Installation Date __________ MIDDLEBY MARSHALL INC. OVEN LIMITED WARRANTY (Non-U.S.A.) MIDDLEBY MARSHALL No Quibble Limited Warranty (U.S.A. Only) The Seller warrants equipment manufactured by it to be free from defects in material and workmanship for which it is responsible. The Seller’s obligation under this warranty shall be limited to replacing or repairing, at Seller’s option, without charge, F.O.B.
Table of Contents (continued) Table of Contents SECTION 1 - DESCRIPTION I. MODEL IDENTIFICATION ............................................ Series PS520 Electrical Specifications ............................. II. COMPONENT FUNCTION .......................................... A. Conveyor Motor and Conveyor Belt ......................... B. Blower Fan ............................................................... C. Electric Heaters ........................................................ D. Cooling Fan ...
SECTION 1 DESCRIPTION SECTION 1 DESCRIPTION I. MODEL IDENTIFICATION The Mideleby Marshall PS520-Series may be used either as a single oven or stacked for use as a double or triple ovens. A single PS520-Series Oven (Figure 1-1) is mounted on a base pad with legs. A double oven (Figure 1-2) consists of two, stacked, single ovens. A triple oven (Figure 1-3) consists of three stacked single ovens. The lower oven is mounted on a base pad. Figure 1-1.
SECTION 1 DESCRIPTION PS520 SERIES OVEN SPECIFICATIONS Conveyor Belt Width 18.00” (457mm) Heating Zone Length 20.00” (5098mm) Baking Area Square Feet 2.5 sq ft (.023 sq. m.) Overall Dimensions Standard Single Oven w/Legs 42.00” (1067mm) L x 35.21” (894mm) W x 21.72” (786mm) H x Overall Dimensions Double Oven 42.00” (1067mm) L x 35.21” (894mm) W x 37.27” (947mm) H x Overall dimensions Triple Oven 42.00” (1067mm) L x 35.21” (894mm) W x 52.82” (1342mm) H x Weight of Single Oven 250 lbs (93.
SECTION 1 DESCRIPTION II. COMPONENT FUNCTION A. Conveyor Motor and Conveyor Belt Blower Motor The conveyor belt is driven by a variable-speed electric motor (figure 1-5) operating through a gear reducer. The motor speed is controlled by a digital control. The stainless-steel wire belt can travel in either direction at variable rates ranging from 1 minute to 10 minutes; this is the time that a product can take to pass trough the oven. B. Blower Fan The blower fans are located at the rear of the oven.
SECTION 2 INSTALLATION SECTION 2 INSTALLATION I. UNLOADING NOTE: The oven, when installed, must be electrically grounded in accordance with local codes, or in the absence of local codes, with the National Electrical Code (NEC), or ANSI/NFPA70 Your Middleby Marshall PS520-Series Oven is shipped partially assembled. It will arrive in a carton on a crate.
SECTION 2 INSTALLATION PARTS LIST FOR SERIES PS520 ELECTRIC OVEN INSTALLATION KIT Single and Double Stack Ovens P/N 48397 Item NO. 1 2 3 4 5 6 6 QTY 4 2 1 1 4 1 1 PART NO.
SECTION 2 INSTALLATION Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONS 1 The Opening Height is Adjustable from 2-1/4 inch minimum to 3-3/4 inch maximum in 1/2 inch increments. Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS Figure 2-7.
SECTION 2 INSTALLATION UTILITY ROUGH-IN DIMENSIONS AND POSITIONING FOR PS520 SERIES OVENS WARNING DO NOT USE CONDUIT OR GAS LINE FOR GROUNDING CONNECTION To Oven CAUTION IT IS RECOMMENDED THAT THE OVEN BE PLACED UNDER A VENTILATION HOOD FOR ADEQUATE AIR SUPPLY AND VENTILATION To Oven ELECTRIC SUPPLY TO BE PROVIDED BY CUSTOMER CIRCUIT BREAKER Separate circuit breaker with lockout/tagout electrical shutoff for each oven. Wire each oven separately.
SECTION 2 INSTALLATION These “C” Channel brackets are installed in the vertical plane using existing screws to support these ‘C” Channels using the upper and lower Key Hole openings in the ‘C’ Channels. The “C” Channels are identical and once installed will allow ample amounts of air through the cooling fan mounted on the rear side of the oven by keeping the oven away from the rear wall.
SECTION 3 OPERATION SECTION 3 OPERATION I. CONTROL FUNCTIONS Temperature Controller Blower Switch Heat Switch Conveyor Speed Control Conveyor Switch Figure 3-1. PS520-Series Oven Control Functions WARNING A possibility of injury from rotating parts and electric shock exists in the oven. Never disassemble or clean the oven with the BLOWER switch or any other oven control turned “ON” or “I”.
SECTION 3 OPERATION If the temperature of the oven is over 2000F (930C) the main blower will continue to run after the blower switch is turned to the “OFF” or “O” position. II. COMPONENT INFORMATION AND LOCATION (Figures 3-1 and 3-2) A. Door Safety Switch C. Heat Switch The Door Safety Switch is located at the lower right side of the control panel opening. Opening the control panel door permits this switch to open, disconnecting power to all electrical controls.
SECTION 3 OPERATION E. Conveyor The on-off switch for the conveyor motor is on the digital control panel. Also on the control panel is the digital conveyor speed control. The digital control can be adjusted from 1-10 minutes bake time (conveyor speed). Refer to Figure 3-3. Conveyor speed is measured by the amount of time it takes for an item to go through the bake chamber of the oven. MEASURING CONVEYOR SPEED Minutes Seconds Figure 3-3. Conveyor Speed Digital Control See Figure 3-4 and 3-5.
SECTION 3 OPERATION 4. Set the temperature controller to the desired baking temperature. WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT ALL TIMES NOTE: For complete temperature controller operation instructions refer to Step C. III. STEP-BY-STEP OPERATION 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. A. Start-up Procedure Daily Start-up 1.
SECTION 3 OPERATION IV. NORMAL OPERATION - STEP-BY-STEP A. Daily Start-up Procedure 1. Check that the circuit breaker/fused disconnect is in the on position. 2. Turn the “BLOWER” 7. Wait for the oven to heat to the setpoint temperature. Higher setpoint temperatures will require a longer wait. The oven cavity can reach a temperature of 5000F (2320C) in approximately 15 minutes. 8.
SECTION 3 OPERATION Display “HEAT ON” Light Shows the Set Point or the Actual Temperature in degrees Fahrenheit (F) or Celsius (C). “SP LOCK” Light Lights when the burner is in operation. Lights when the set point is locked out from changes. This setting can only be changed by service personnel. “SET PT”(setpoint) Light Lights when the set point is shown in the display OVERTEMP Light “ACTUAL TEMP” Light Lights when the oven temperature is greater than 6500F (3430C).
SECTION 3 OPERATION V. QUICK REFERENCE: TROUBLESHOOTING SYMPTOM PROBLEM light is lit, food product is undercooked The oven temperature exceeded 6500F (3430C), and the burner was automatically shut down • Follow the procedures under Daily Shutdown Procedures in this section to shut down the oven. Contact your Middleby Marshall Authorized Service Agent to determine and correct the cause of the condition to prevent damage to the oven.
SECTION 4 MAINTENANCE SECTION 4 MAINTENANCE WARNING Possibility of injury from rotating parts and electrical shock exist in this oven. Turn off and lockout or tagout electrical supply to oven(s) before attempting to disassemble, clean or service oven(s). Never disassemble or clean the oven with the blower switch or any other part of the oven turned on. WARNING Before performing any maintenance work or cleaning, turn main power switch off.
SECTION 4 MAINTENANCE I. MAINTENANCE - DAILY D. Crumb Pans (Figure 4-2) A. Exterior Everyday you should clean the outside of the oven with a soft cloth and mild detergent. WARNING Crumb pan is extremely hot while oven is operating. Allow oven to cool before removing crumb pan. WARNING Never use a water hose or pressurized steam cleaning equipment when cleaning the oven. When oven is cool remove and clean the crumb pan at each end of the oven.
SECTION 4 MAINTENANCE II. MAINTENANCE - MONTHLY react with the aluminized finger manifold surfaces. NOTE: The oven interior may require cleaning more than once a month depending on the volume of baking. To clean the interior , you have to disassemble some parts of the oven. You can order non-caustic cleaner from your local authorized Middleby Marshall Parts Distributor in the quantities listed below When cleaning your PS520-Series Oven note the following: Part# 27170-0244 27170-0246 PRECAUTIONS1.
SECTION 4 MAINTENANCE 5. Lift other side of conveyor and push toward other side. 6. Remove conveyor as shown. Figure 4-6 Figure 4-4 Figure 4-7 CAUTION Figure 4-5 Be careful no to bump the drive sprocket while handling the conveyor, to avoid damaging the drive shaft.
SECTION 4 MAINTENANCE B. Air Fingers Disassembly For cleaning 1. As the air fingers are removed use a felt pen to mark all parts of the fingers. This includes the finger manifold, inner plate and the outer plate (see Figure 1-9). If a blank or choke plate is used, mark that plate also, Fingers are marked in the order shown; as viewed from the front of the oven. (The marks for an upper oven should be preceded with a “U”, example UB1, UT2, etc.) Standard Fingers 2. Slide blank plates straight out.
SECTION 4 MAINTENANCE 6. To remove the inner plate, pull the plate out and then up. C. Reassembly of Air Fingers 1. Air fingers are made up of one inner plate, one outer plate and the finger housing manifold. Be sure to match up the markings (T1, T2, T3, etc.) on all parts of the air fingers as you are reassembling. Figure 4-11 7. The outer finger plate is stainless steel and may be cleaned by either soaking in a hot, strong detergent solution or using a caustic cleaner.
SECTION 4 MAINTENANCE 4 . Replace the air fingers by pushing in at the back side. Remember to replace them according to the numbers marked on them when they were removed. They must go back in the same way they came out. IMPORTANT: When inserting fingers the tab on the outer plate must be in the groove as shown in Figure 4-18. There is a blocking tab on the outside of the groove which will prevent inserting the finger in the groove if the outer plate is moved away from the flange of the finger.
SECTION 4 MAINTENANCE 5. Install fingers and blank plates correctly with edges interlocked and no space between edges. Top Finger Correct Edges Overlap Completely Blank Plate Tab on Outer Plate of Finger Located in Groove Figure 4-18 D. Reinstall End Plugs 1. Reinstall lower end plug. Be sure to tighten the wing screw on the end plug. 2. Reinstall conveyor. 3. Reinstall upper end plug. Be sure to tighten two wing screws on the end plug..
SECTION 4 MAINTENANCE E. Conveyor Reassembly Into Oven F. Checking Conveyor Belt Tension 1. Lift conveyor and position it in the oven as shown. WARNING Oven conveyor belt must be cool when adjusting belt. Do not adjust belt if HOT. NOTE: Conveyor may be inserted into either end of the oven. If it is ti be installed from the non-drive end of the oven the drive sprocket assembly must be removed as shown in conveyor disassembly section. 1.
SECTION 4 MAINTENANCE G. Conveyor Belt Link Removal 4. Unhook the link to be removed. 1. Using long nose pliers, an entire link can be removed with the conveyor assembly either in or out of the oven. Position master links at the end of the conveyor as shown in Figure 4-24. 5. Pull up on the link section and remove. Do not discard the link removed as it may be used for making spare master links. NOT: If a section of the conveyor is being replaced it should be done now.
SECTION 4 MAINTENANCE 6. Reconnecting the inside master links (Figure 4-29) H. Attaching Drive Chain 1. If drive sprocket assembly was removed, reassemble it onto the conveyor drive shaft. Be sure flat on end of drive shaft aligns with set screw in conveyor shaft collar. Once in place tighten 3/32” set screw. 2. Lift conveyor and install drive chain to conveyor drive sprocket and motor sprocket. Figure 4-29 NOTE: The outside master links have right and left sides to them.
SECTION 4 MAINTENANCE A. Electrical Terminals 4. Reattach conveyor guard to control panel and secure two screws. Open the control cabinet door by removing the three screws from the control cabinet door. Tighten all electrical control terminal screws as shown in Figure 435. Install both upper end plugs. Figure 4-34 Figure 4-35 III. MAINTENANCE - EVERY 3 MONTHS B. Ventilation Check that the air circulation throughout the oven is not blocked and is working properly. WARNING IV.
SECTION 4 MAINTENANCE PS520-SERIES ELECTRIC OVEN KEY SPARE PARTS KIT ITEM PART NO.
SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM: OVEN BLOWER AND CONVEYOR OPERATE, YET THE OVEN IS NOT HEATING PROBLEM: PRODUCTS ARE OVERCOOKED OR UNDERCOOKED Check for correct setting of conveyor speed control. Check for correct setting on temperature controller Set the conveyor speed control at correct setting. Turn temperature control to correct setting. Reset the temperature controller to a new setting (above 2000F), after turning the BLOWER switch to off for 30 seconds.
Drawing 48713 Rev J: Wiring Diagram, E208-240V 50/60/1 SECTION 6 ELECTRICAL SCHEMATICS 30
Drawing 52445 Rev J: Wiring Diagram, E380-480V 50/60/1 SECTION 6 ELECTRICAL SCHEMATICS 31
Drawing 52446 Rev K: Wiring Diagram, E230-240V CE, 1Ph SECTION 6 ELECTRICAL SCHEMATICS 32
Drawing 54661 Rev J: Wiring Diagram, E380-400V CE, 1Ph SECTION 6 ELECTRICAL SCHEMATICS 33
Drawing 58158 Rev F: Wiring Diagram, E380-400V CE, 3Ph SECTION 6 ELECTRICAL SCHEMATICS 34
NOTES 35
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. NOTICE During the warranty period. ALL parts replacement and servicing should be performed by your Middleby Marshall Authorized Service Agent. Service that is performed by parties other than your Middleby Marshall Authorized Service Agent may void your warranty.