Page 2 - ii; FOR YOUR SAFETY, DO NOT STORE OR USE; WARNING; The warranty is; unless; repairs. A Service Agency Directory is supplied with your oven.; instructions are included in the Gas Conversion Kit.
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 proper ty damage, injury, ordeath. Read the installation, operation, a...
Page 3 - iii; MIDDLEBY MARSHALL INC.; UIBBLE; NLY
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 6 of this Manual.; TABLE OF CONTENTS
iv NOTE Wiring Diagrams are in Section 6 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 GAS 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 - GAS ORIFICE AND PRESSURE SPECIFICATIONS (PER OVEN CAVITY) - CE OVENS; Wiring Diagrams are contained in Section 6 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 × 21.10 ″ (536mm) H × Overall Dime...
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 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 wire belt can travel in either direct...
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 - Gas oven installtions must conform with AGA Codes AG311 and AG601.; SECTION 2
SECTION 2 INSTALLATION 7 WARNING Keep the appliance area free and clear of combustibles. WARNING Do not obstruct the flow of combustion and ventilation air to and from your oven. There must be no obstructions around or underneath the oven. Constructional changes to the area where the oven is install...
Page 12 - The oven, when installed, must be electrically; CAUTION
8 SECTION 2INSTALLATION PARTS LIST FOR SERIES PS520 GAS OVEN INSTALLATION KIT Single Stack Oven P/N 59182 ITEM N O . Q T Y PART NO. DESCRIPTION 1 4 3101908 LEG 4 ″ AD FT 2 2 48392 INSULATION BOTTOM TRAY 3 1 48394 BOTTOM TRAY WELDMENT 4 1 48396 TOP COVER 5 4 51387 SCREW MSSLT THREAD 8-32 × 1/2, 18-8 ...
Page 14 - Figure 2-5. MODEL PS520 SINGLE OVEN DIMENSIONS
10 SECTION 2INSTALLATION 4.00 101.6mm 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 15 - Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS; P/N 59927 is shown in its correct installed position.
SECTION 2 INSTALLATION 11 Figure 2-6. MODEL PS520 DOUBLE OVEN DIMENSIONS 4.00 101.6mm 1 The Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in 1/2 inch increments. P/N 59927 is shown in its correct installed position. 1 2
Page 16 - Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONS
12 SECTION 2INSTALLATION Figure 2-7. MODEL 520 TRIPLE OVEN DIMENSIONS 1 The Opening Height is Adjustable from 2-1/4 inch minimumto 3-3/4 inch maximum in 1/2 inch increments. P/N 59927 is shown in its correct installed position. 1 2
Page 17 - use conduit for ground.; Installation
SECTION 2 INSTALLATION 13 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/tag...
Page 18 - The electric supply installation must satisfy the; IV. ELECTRIC SUPPLY FOR GAS; Figure 2-10. Typical Electric Oven Data Plate
14 SECTION 2INSTALLATION 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 21 - SECTION 3
SECTION 3 OPERATION 17 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 22 - II. COMPONENT INFORMATION AND; A. Door Safety Switch; D. Temperature Controller; Figure 3-2. Interior View of Control Console
18 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 23 - MEASURING CONVEYOR SPEED.; conveyor running right to left.; Figure 3-3. Conveyor Speed Digital Control
SECTION 3 OPERATION 19 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 24 - For complete temperature controller operation
20 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 26 - A.Daily Startup Procedure; DAILY SHUTDOWN PROCEDURE; or; IMPORTANT
22 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 27 - Service use
SECTION 3 OPERATION 23 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 29 - SECTION 4; NOTICE
SECTION 4 MAINTENANCE 25 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 30 - IMPORTANT NOTE; Crumb Pan Cleaning
26 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 31 - The oven interior may require cleaning more; Lift other side of conveyor and push toward other side.
SECTION 4 MAINTENANCE 27 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 32 - Be careful not to bump the drive sprocket while
28 SECTION 4MAINTENANCE 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. Figure 4-4. Figure 4-5.
Page 33 - B. Air Fingers Disassembly For Cleaning; Standard Fingers; Some oven users require a custom finger arrange-
SECTION 4 MAINTENANCE 29 B. Air Fingers Disassembly For Cleaning 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 ...
Page 34 - To remove the inner plate, pull the plate out and then up.; C. Reassembly of Air Fingers
30 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 35 - When inserting fingers the tab on
SECTION 4 MAINTENANCE 31 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 37 - D. Reinstall End Plugs; Reinstall upper end plug. Be sure to tighten two wing
SECTION 4 MAINTENANCE 33 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 38 - F. Checking Conveyor Belt Tension; E. Conveyor Reassembly Into Oven; Lift conveyor and position it in oven as shown.
34 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 39 - G. Conveyor Belt Link Removal; If a section of the conveyor belt is being replaced
SECTION 4 MAINTENANCE 35 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 40 - H. Attaching Drive Chain
36 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 41 - A. Electrical Terminals
SECTION 4 MAINTENANCE 37 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 42 - KEY SPARE PARTS KIT
38 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 43 - SECTION 5
39 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 44 - NOTES
Page 45 - SECTION 6
41 SECTION 6 ELECTRICAL SCHEMATICS SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, G208-240 50/60 GO, PS520G - + + + - - + - + 214 215 401 400 212 213 211 210 240 317 315 206 204 337 335 228 228 333 204 319 317 313 208 208 311 311 307 305 309 307 230 339 339 230 TC1 105 105 103 103 104 104 H2 H1 X2 ...
Page 48 - 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...
