Page 2 - ii; FOR YOUR SAFETY, DO NOT STORE OR USE; WARNING; The warranty is; unless; repairs. A Ser vice Agency Directory is supplied with your oven.
ii WARNING FOR YOUR SAFETY, DO NOT STORE OR USE GASOLINE OR OTHER FLAMMABLE VAPORS ANDLIQUIDS IN THE VICINITY OF THIS OR ANY OTHER APPLIANCE. WARNING Improper installation, adjustment, alteration, service, ormaintenance can cause property damage, injury, ordeath. Read the installation, operation, an...
Page 3 - iii; MIDDLEBY MARSHALL INC.; UIBBLE
iii MIDDLEBY MARSHALL INC. OVEN LIMITED WARRANTY (Non U.S.A.) The Seller warrants equipment manufactured by it to be free fromdefects in material and workmanship for which it is responsible. TheSeller’s obligation under this warranty shall be limited to replacing orrepairing, at Seller’s option, wit...
Page 4 - iv; NOTE; Wiring Diagrams are in Section 7 of this Manual.; TABLE OF CONTENTS
iv NOTE Wiring Diagrams are in Section 7 of this Manual. The diagram for each oven is also on the lower inner surface of its Control Console. TABLE OF CONTENTS Page SECTION 1 I. MODEL IDENTIFICATION .............................................. 1SERIES PS520 ELECTRICAL SPECIFICATIONS ............. ...
Page 5 - MODEL IDENTIFICATION; SECTION 1
SECTION 1 DESCRIPTION 1 I. MODEL IDENTIFICATION The Middleby Marshall PS520-Series may be used eitheras a single oven or stacked for use as double or tripleovens. A single PS520-Series Oven (Figure 1-1) is mounted on abase pad with legs. A double oven (Figure 1-2) consists oftwo, stacked, single ove...
Page 6 - Wiring Diagrams are contained in Section 7 of this Manual; This Manual Must Be Kept For Future Reference
2 SECTION 1DESCRIPTION PS520 SERIES OVEN SPECIFICATIONS Conveyor Belt Width 18.00 ″ (457mm) Heating Zone Length 20.00 ″ (5098mm) Baking Area Square Feet 2.5 sq. ft. (0.23 sq. m.) Overall Dimension Standard Single Oven w/Legs 42.00 ″ (1067mm) L × 35.21 ″ (894mm) W × 21.72 ″ (786mm) H × Overall Dimens...
Page 8 - II. COMPONENT FUNCTION; A. Conveyor Motor and Conveyor Belt; An Air Finger Assembly is made up of three parts:; Inner Plate; -The perforated Inner Plate is vital in forming; Components; Blower Assembly
4 SECTION 1DESCRIPTION II. COMPONENT FUNCTION (Figure 1-4) II. COMPONENT FUNCTION A. Conveyor Motor and Conveyor Belt The conveyor belt is driven by a variable-speed electricmotor (Figure 1-5) operating through a gear reducer. Themotor speed is controlled by a digital control. The stain-less-steel w...
Page 10 - The Blank Plates are available to install
6 SECTION 1DESCRIPTION Half Blank Plate Blank Plate Outer Plate Inner Plate Finger Manifold Assembly Baffle Figure 1-7. Blank Plates (two sizes) and an Air Finger. F2. Blank Plates 1. Blank Plates- The Blank Plates are available to install on the plenum where an air finger is not required.
Page 11 - SECTION 2; The oven, when installed, must be electrically; CAUTION; to a left side wall, 18
SECTION 2 INSTALLATION 7 SECTION 2 INSTALLATION NOTE: The oven, when installed, must be electrically grounded in accordance with local codes, or in the ab-sence of local codes, with the National Electrical Code(NEC), or ANSI/NFPA70. NOTE There must be adequate clearance betweenthe oven and any adjac...
Page 13 - Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONS
SECTION 2 INSTALLATION 9 Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in 1/2 inch increments. 1 1
Page 14 - Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS
10 SECTION 2INSTALLATION Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in 1/2 inch increments. 1 1
Page 15 - Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONS
SECTION 2 INSTALLATION 11 Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONS The Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in 1/2 inch increments. 1 1
Page 16 - Installation
12 SECTION 2INSTALLATION WARNING DO NOT USE CONDUIT OR GAS LINEFOR GROUND CONNECTION. CAUTION IT IS RECOMMENDED THAT THE OVENBE PLACED UNDER A VENTILATIONHOOD FOR ADEQUATE AIR SUPPLYAND VENTILATION. ELECTRIC SUPPLY TO BE PROVIDED BY CUSTOMER CIRCUIT BREAKER Separate circuit breaker with lockout/tago...
Page 17 - Middleby Technical; III. ELECTRICAL CONNECTION INFORMATION; The electric supply installation must satisfy the; IV. ELECTRIC SUPPLY FOR; Figure 2-10. Typical Electric Oven Data Plate
SECTION 2 INSTALLATION 13 These ‘C’ Channel brackets are installed in the verticalplane using existing screws (Item 6) to support these ‘C’Channels using the upper and lower Key Hole openings inthe ‘C’ Channels. The ‘C’ Channels are identical and onceinstalled will allow ample amounts of air through...
Page 18 - NOTES
Page 19 - SECTION 3
SECTION 3 OPERATION 15 SECTION 3 OPERATION I. CONTROL FUNCTIONS WARNING A possibility of injury from rotating parts andelectric shock exists in this oven.Never disassemble or clean the oven with theBLOWER switch or any other oven control turned“ON” or “I”. Turn “OFF” or “O” and lockout ortagout all ...
Page 20 - II. COMPONENT INFORMATION AND; A. Door Safety Switch; D. Temperature Controller; Figure 3-2. Interior View of Control Console
16 SECTION 3OPERATION II. COMPONENT INFORMATION AND LOCATION (Figures 3-1 and 3-2) A. Door Safety Switch The Door Safety Switch is located at the lower right sideof control panel opening. Opening the control panel doorpermits this switch to open, disconnecting power to allelectrical controls. CAUTIO...
Page 21 - MEASURING CONVEYOR SPEED.; conveyor running right to left.; Figure 3-3. Conveyor Speed Digital Control
SECTION 3 OPERATION 17 E. Conveyor The on-off switch for the conveyor motor is on the controlpanel. Also on the control panel is the digital conveyorspeed control. The digital control can be adjustedf r o m 1 - 1 0 m i n . b a k e t i m e ( c o n v e y o r s p e e d ) .Refer to Figure 3-3. Conveyor ...
Page 22 - For complete temperature controller operation
18 SECTION 3OPERATION WARNING OVEN MUST BE KEPT CLEAR OF COMBUSTIBLES AT ALL TIMES. III. STEP-BY-STEP OPERATION A. Startup Procedures Daily Startup 1. Turn the BLOWER switch (Figure 3-6) to the “ON” or “I”position. This starts the main blower fan and the coolingfans. The blower circulates air throug...
Page 24 - A.Daily Startup Procedure; or
20 SECTION 3OPERATION 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 R...
Page 25 - Service use
SECTION 3 OPERATION 21 Display Shows the Set Point or the Actual Tem- perature in degrees Fahrenheit (F) or Celsius (C). "SP LOCK" Light Lights when the set point is lockedout from changes. This setting can only be changed by service personnel. OVERTEMP Light Lights when the oven temperature...
Page 27 - SECTION 4; NOTICE
SECTION 4 MAINTENANCE 23 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 disas- semble or clean the oven with...
Page 28 - IMPORTANT NOTE; Crumb Pan Cleaning
24 SECTION 4MAINTENANCE I. MAINTENANCE - DAILY A. Exterior Everyday you should clean the outside of the oven with asoft cloth and mild detergent. WARNING Never use a water hose or pressurized steamcleaning equipment when cleaning the oven. B. Cooling Fan 1. ONE COOLING FAN GRILLE AT THE REAR OF THEO...
Page 29 - The oven interior may require cleaning more; the aluminized finger manifold surfaces.; Quantity
SECTION 4 MAINTENANCE 25 Figure 4-3. II. MAINTENANCE - MONTHLY NOTE: The oven interior may require cleaning more than once a month depending on the volume ofbaking. To clean the interior, you have to disassemblesome parts of the oven. When cleaning your Series PS520 Oven note thefollowing: PRECAUTIO...
Page 30 - Lift other side of conveyor and push toward other side.; Be careful not to bump the drive sprocket while; B. Air Fingers Disassembly For Cleaning
26 SECTION 4MAINTENANCE 5. Lift other side of conveyor and push toward other side. 6. Remove conveyor as shown. Figure 4-6. Figure 4-7. CAUTION Be careful not to bump the drive sprocket while handling the conveyor, to avoid damaging the drive shaft. B. Air Fingers Disassembly For Cleaning Figure 4-4...
Page 31 - Standard Fingers; Some oven users require a custom finger arrange-
SECTION 4 MAINTENANCE 27 1. As the air fingers are removed use a felt pen to mark allparts of the fingers. This includes the finger manifold, innerplate and the outer plate (refer to Figure 1-9). If a blank orchoke plate is used, mark that plate also. Fingers aremarked in the order shown; as viewed ...
Page 32 - To remove the inner plate, pull the plate out and then up.; C. Reassembly of Air Fingers
28 SECTION 4MAINTENANCE 6. To remove the inner plate, pull the plate out and then up. Figure 4-11. 7. The outer finger plate is stainless and may be cleanedby either soaking in a hot, strong detergent solution orusing a caustic cleaner. The conveyor belt can also becleaned in the same way. Figure 4-...
Page 33 - When inserting fingers the tab on
SECTION 4 MAINTENANCE 29 4. Replace the air fingers by pushing in at the back side.Remember to replace them according to the numbersmarked on them when they were removed. They must goback in the same way they came out. IMPORTANT: When inserting fingers the tab on the outer plate must be in the groov...
Page 35 - D. Reinstall End Plugs; Reinstall upper end plug. Be sure to tighten two wing
SECTION 4 MAINTENANCE 31 D. Reinstall End Plugs 1. Reinstall lower end plug. Be sure to tighten the wingscrew on the end plug. 2. Reinstall conveyor. 3. Reinstall upper end plug. Be sure to tighten two wing screws on the end plug. Figure 4-19. Figure 4-20.
Page 36 - F. Checking Conveyor Belt Tension; E. Conveyor Reassembly Into Oven; Lift conveyor and position it in oven as shown.
32 SECTION 4MAINTENANCE F. Checking Conveyor Belt Tension WARNING Oven conveyor belt must be cool when adjustingbelt. Do not adjust belt if HOT. 1. With the conveyor assembly in the oven, stand at oneend of conveyor and check tension by lifting the conveyorbelt at the center of the oven chamber open...
Page 37 - G. Conveyor Belt Link Removal; If a section of the conveyor belt is being replaced
SECTION 4 MAINTENANCE 33 G. Conveyor Belt Link Removal 1. Using long nose pliers, an entire link can be removedwith the conveyor assembly either in or out of the oven.Position master links at end of conveyor as shown inFigure 4-24. Figure 4-24. 2. Using long nose pliers, unhook master links at left ...
Page 38 - H. Attaching Drive Chain
34 SECTION 4MAINTENANCE H. Attaching Drive Chain 1. If drive sprocket assembly was removed reassemble itinto the conveyor drive shaft. Be sure flat on end of driveshaft aligns with set screw in conveyor shaft collar. Oncein place tighten 3/32 ″ set screw. 2. Lift conveyor and install drive chain to ...
Page 39 - A. Electrical Terminals
SECTION 4 MAINTENANCE 35 4. Reattach conveyor guard to control panel and securetwo screws. Install both upper end plugs. Figure 4-34. III. MAINTENANCE - EVERY 3 MONTHS WARNING Shut OFF all electrical power and lock/tag out theswitch before attempting maintenance work. NOTE: It is recommended that th...
Page 40 - KEY SPARE PARTS KIT; ITEM; Conveyor Drive Motor and Magnet
36 SECTION 4MAINTENANCE KEY SPARE PARTS KIT An oven can be purchased with a Key Spare Parts Kit(Figure 4-36). (The kit can be purchased when the oven isordered, or later, from a Middleby Marshall AuthorizedParts Distributor). The kit contains many of the crucial parts that can reduce serious downtim...
Page 41 - SECTION 5
37 SECTION 5 TROUBLESHOOTING SECTION 5 TROUBLESHOOTING PROBLEM: PRODUCTS ARE OVERCOOKED OR UNDERCOOKED Check for correct setting of conveyor speed control. Set the conveyor speed control at correct setting. Check for correct setting on tempera- ture controller. Turn temperature control to correct se...
Page 43 - ENGLISH; SECTION 6; SECTION 6 - PARTS LIST
39 ENGLISH SECTION 6 PARTS LIST SECTION 6 - PARTS LIST
Page 55 - SECTION 7
51 SECTION 7 ELECTRICAL SCHEMATICS SECTION 7 ELECTRICAL SCHEMATICS Wiring Diagram, E208-240 50/60/1, PS520
Page 60 - can cause property damage, injury or death. Read the installation,; the manufacturer of all warranty and liability.
Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847)741-3300 • FAX (847)741-4406 www.middleby.com Middleby is proud to support the Commercial Food EquipmentService Association (CFESA). We recognize and applaudCFESA's ongoing efforts to improve the quality of techni...
