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Инструкция обслуживания Middleby Marshall PS724E

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  • Middleby Marshall PS724E - page 1

    ©2008 Middleby Marshall Inc. Middleby Middleby Middleby Middleby Middleby Marshall Marshall Marshall Marshall Marshall A MIDDLEBY COMPANY PS724-Series Electric Ovens: English October 27, 2008 owner's operating & installation manual PS724-Series O VENS Model PS724E PS724 (Triple) PS724 (Double) Part No. 61778 Price $30.00 P: 10/08 ® PS724 ...

  • Middleby Marshall PS724E - page 2

    ii W ARNING FOR Y OUR SAFETY , DO NO T ST ORE OR USE GASOLINE OR O THER FLAMMABLE V APORS AND LIQUIDS IN THE VICINITY OF THIS OR ANY O THER APPLIANCE. W ARNING Improper installation, adjustment, alteration, service, or maintenance can cause pr operty damag e , injur y , or death. Read the installation, operation, and maintenance instructions thorou ...

  • Middleby Marshall PS724E - page 3

    iii MIDDLEBY MARSHALL INC. O VEN LIMITED W ARRANTY (Non U .S.A.) 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. Seller’s factory, ...

  • Middleby Marshall PS724E - page 4

    iv NO TE Wiring Diagrams are in Section 6 of this Manual. The diagram for each oven is also inside the left side control box door. TABLE OF CONTENTS Page SECTION 1 I. MODEL IDENTIFICATION .............................................. 1 SERIES PS724 ELECTRIC SPECIFICATIONS ................. 2 II. COMPONENT FUNCTION ................................. ...

  • Middleby Marshall PS724E - page 5

    SECTION 1 DESCRIPTION 1 I . MODEL IDENTIFICATION The Middleby Marshall PS724-Series may be used either as a single oven or stacked for use as double or triple ovens. A single PS72 4-Series Oven (Figure 1-1) can be mounted on an insulated base with short legs for countertop use, or on a leg stand with a lower shelf and casters for a free standing un ...

  • Middleby Marshall PS724E - page 6

    2 SECTION 1 DESCRIPTION NO TE Wiring Diagrams are contained in Section 6 of this Manual and are also located inside inside the left side control box door. Additional electrical information is provided on the oven's serial plate. This Manual Must Be Kept For Future Reference. PS724 SERIES OVEN SPECIFICATIONS Conveyor Belt Width 18.00 ″ (457 m ...

  • Middleby Marshall PS724E - page 7

    SECTION 1 DESCRIPTION 3 Figure 1-4. PS724-Series Oven Components Locations 2EMOV ABLE #ONV EYOR !SSEMBLY #ASTERS 4 EMPERATURE #ONTROLLER 3PEED #ONTROL (EAT#ONV EYOR 3WITCH -AIN"LOWER 3WITCH 2EMOV ABLE %ND0LUG5PPER 2EMOV ABLE %ND0LUG,OWER ...

  • Middleby Marshall PS724E - page 8

    4 SECTION 1 DESCRIPTION II. COMPONENT FUNCTION (Figure 1-4) A. Conveyor Motor and Conveyor Belt 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 ...

  • Middleby Marshall PS724E - page 9

    SECTION 1 DESCRIPTION 5 Figure 1-6. Cooling Fan #OOLING & AN'R ILLE #OOLING& AN'R ILLE 0 OWER#ABLE%NTR ANCE "LOWER-OTOR!CCESS 0 OWER#ABLE%NTR ANCE "LOWER-OTOR!CCESS #ONNECTION "LOCK!CCESS ...

  • Middleby Marshall PS724E - page 10

    6 SECTION 1 DESCRIPTION Figure 1-7. Air Finger. Outer Plate Inner Plate Finger Manifold Assembly Baffle ...

  • Middleby Marshall PS724E - page 11

    SECTION 2 INSTALLATION 7 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 installed shall not affect the air supply to the oven. CAUTION For additional installation information, contact your loca ...

  • Middleby Marshall PS724E - page 12

    8 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. NO TE There must be adequate clearance between the oven and any adjacent combustible con- struction. Clearance must also be provided for s ...

  • Middleby Marshall PS724E - page 13

    SECTION 2 INSTALLATION 9 Figure 2-1. PS724-Series Electric Oven Installation Kit 03   /6%. ).34!,,!4)/. 2%15)2%$ +)43 !.$ %15)0-%.4 490% 03  3 3  03  3 3  /& 3INGLE / ...

  • Middleby Marshall PS724E - page 14

    10 SECTION 2 INSTALLATION Figure 2-5. MODEL PS724 SINGLE OVEN DIMENSIONS ...

  • Middleby Marshall PS724E - page 15

    SECTION 2 INSTALLATION 11 Figure 2-6. MODEL PS724 DOUBLE OVEN DIMENSIONS ...

  • Middleby Marshall PS724E - page 16

    12 SECTION 2 INSTALLATION Figure 2-7. MODEL PS724 TRIPLE OVEN DIMENSIONS ...

  • Middleby Marshall PS724E - page 17

    SECTION 2 INSTALLATION 13 WARNING DO NOT USE CONDUIT FOR GROUND CONNECTION. CAUTION IT IS RECOMMENDED THAT THE OVEN BE PLACED UNDER A VENTILATION HOOD FOR ADEQUATE AIR SUPPLY AND VENTILATION. ELECTRIC SUPPLY TO BE PROVIDED BY CUSTOMER CIRCUIT BREAKER A seperate circuit breaker with lockout/tagout electrical shutoff is required for each, seperately ...

  • Middleby Marshall PS724E - page 18

    14 SECTION 2 INSTALLATION III. ELECTRICAL CONNECTION INFORMATION FOR PS72 4 -SERIES OVENS. WARNING Authorized supplier personnel normally ac- complish the connections for the ventilation system, electric and gas supplies, as ar- ranged by the customer. Following these connections, the factory-authorized installer can perform the initial startup of ...

  • Middleby Marshall PS724E - page 19

    SECTION 3 OPERATION 15 SECTION 3 OPERA TION I. CONTROL FUNCTIONS WARNING A possibility of injury from rotating parts and electric shock exists in this oven. Never disassemble or clean the oven with the BLOWER switch or any other oven control turned “ON” or “I”. Turn “OFF” or “O” and lockout or tagout all electric power to the oven b ...

  • Middleby Marshall PS724E - page 20

    16 SECTION 3 OPERATION I I . COMPONENT INFORMATION AND LOCATION (Figures 3-1 and 3-2) A. Door Safety Switch The Door Safety Switch is located at the lower right side of control panel opening. Opening the control panel door permits this switch to open, disconnecting power to all electrical controls, except for the blower motor inverters, located in ...

  • Middleby Marshall PS724E - page 21

    SECTION 3 OPERATION 17 E. Conveyor The on-off switch for the conveyor motor is on the control panel. Also on the control panel is the digital conveyor speed control. The digital control can be adjusted from 30 seconds to 12 minutes bake time (conveyor speed). Refer to Figure 3-3. Conveyor speed is measured by the amount of time it takes for an item ...

  • Middleby Marshall PS724E - page 22

    18 SECTION 3 OPERATION 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 cooling fans. The blower circulates air through the air fingers and must stay on duri ...

  • Middleby Marshall PS724E - page 23

    SECTION 3 OPERATION 19 Figure 3-6. Control Panel (%! 4#/.6%9 /2 ...

  • Middleby Marshall PS724E - page 24

    20 SECTION 3 OPERATION (%! 4#/.6%9 /2 (%! 4#/.6%9 /2 (%! 4#/.6%9 /2 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 MINUT ...

  • Middleby Marshall PS724E - page 25

    SECTION 3 OPERATION 21 Display Shows the Set Point or the Actual T em- perature in degrees Fahrenheit (F) or Celsius (C). "SP LOCK" Light Lights when the set point is locked out from changes. This setting can only be changed by service personnel. OVERTEMP Light Lights when the oven temperature is greater than 650°F (343°C). Refer to Qui ...

  • Middleby Marshall PS724E - page 26

    22 SECTION 3 OPERATION V. QUICK REFERENCE: TROUBLESHOOTING SYMPTOM PROBLEM SOLUTION The oven temperature ex- ceeded 650°F (343°C), and the burner was automati- cally 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 c ...

  • Middleby Marshall PS724E - page 27

    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 the blower switch or any other part of the oven t ...

  • Middleby Marshall PS724E - page 28

    24 SECTION 4 MAINTENANCE I. MAINTENANCE - DAILY A. Exterior Everyday you should clean the outside of the oven with a soft cloth and mild detergent. WARNING Never use a water hose or pressurized steam cleaning equipment when cleaning the oven. B. Cooling Fan 1. TWO COOLING FAN GRILLES AT THE REAR OF THE OVEN MUST BE CLEANED DAILY - Clean grilles wit ...

  • Middleby Marshall PS724E - page 29

    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 of baking. To clean the interior, you have to disassemble some parts of the oven. When cleaning your Series PS724 Oven note the following: PRECAUTIONS - 1. Do not use excessive water or saturatio ...

  • Middleby Marshall PS724E - page 30

    26 SECTION 4 MAINTENANCE 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. ,OOSEN4 WO3CRE WSAND 2EMOV E#HAIN3PROCK ET#OVER Figure 4-4. Figure 4-5. ...

  • Middleby Marshall PS724E - page 31

    SECTION 4 MAINTENANCE 27 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 (refer to Figure 1-9). Fingers are marked in the order shown; as viewed from the front of the oven. (The marks for an upper oven should ...

  • Middleby Marshall PS724E - page 32

    28 SECTION 4 MAINTENANCE Figure 4-11. Standard Lower Finger Figure 4-12. Standard Upper Finger 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 the parts of the air fingers as you are reassembling. Figure 4-13. 2. R ...

  • Middleby Marshall PS724E - page 33

    SECTION 4 MAINTENANCE 29 5. Install fingers with center spacer between the two finger back plates to insure proper spacing Figure 4-16. Extended Lip Flange of Finger Manifold Center Spacer ...

  • Middleby Marshall PS724E - page 34

    30 SECTION 4 MAINTENANCE D. Reinstall End Plugs 1. Reinstall lower end plug (has flange that extends into oven). Place and secure plastic wing nuts on the end plug. 2. Reinstall conveyor. 3. Reinstall upper end plug (no inner flange). Place and secure plastic wing nuts on the end plug. 2EMOV ABLE #O NVEYO R !SSEMBLY #ASTERS 4 EMPERATURE #ONTROLLER ...

  • Middleby Marshall PS724E - page 35

    SECTION 4 MAINTENANCE 31 F. Checking Conveyor Belt Tension WARNING Oven conveyor belt must be cool when adjusting belt. Do not adjust belt if HOT. 1. With the conveyor assembly in the oven, stand at one end of conveyor and check tension by lifting the conveyor belt at the center of the oven chamber opening. The belt should not lift higher that 1 ? ...

  • Middleby Marshall PS724E - page 36

    32 SECTION 4 MAINTENANCE G. Conveyor Belt Link Removal 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 end of conveyor as shown in Figure 4-22. Figure 4-22. 2. Using long nose pliers, unhook master links at left end of conveyor as shown in Figure 4-23. Figure ...

  • Middleby Marshall PS724E - page 37

    SECTION 4 MAINTENANCE 33 H. Attaching Drive Chain 1. If drive sprocket assembly was removed reassemble it into 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. Push and hold conveyor end down to reinstall the chain. Figure 4-30. 3. The angle pla ...

  • Middleby Marshall PS724E - page 38

    34 SECTION 4 MAINTENANCE 4. Reattach conveyor guard to control panel and secure two screws. 5. Install both upper end plugs. Figure 4-32. III. MAINTENANCE (3 and 6 MONTH) WARNING Shut OFF all electrical power and lock/tag out the switch before attempting maintenance work. NOTE: I t is recommended that the 3-month and 6-month maintenance items b e p ...

  • Middleby Marshall PS724E - page 39

    SECTION 4 MAINTENANCE 35 Figure 4-33. PS724-SERIES ELECTRIC OVEN KEY SPARE PARTS KIT ITEM PART NO. ENGLISH DESCRIPTION QUANTITY 1 44549 Contactor, 230V, Coil 85A 1 2 59558 Motor, Blower 1 3 60520-2 Thermocouple, Type “J” 2.00 ″ (Temperature Control) 2 4 45244 Filter, RFI (380 VAC versions ONLY) 1 5 60185 Photoeye Sensor 1 6 31504 T r an s f o ...

  • Middleby Marshall PS724E - page 40

    36 SECTION 4 MAINTENANCE NOTES ...

  • Middleby Marshall PS724E - page 41

    37 SECTION 5 TROUBLESHOOTING SECTION 5 TR OUBLESHOO TING 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 setting. If products still cook incorrectly, call ...

  • Middleby Marshall PS724E - page 42

    SECTION 5 TROUBLESHOOTING 38 NO TES ...

  • Middleby Marshall PS724E - page 43

    39 SECTION 6 ELECTRICAL SCHEMATICS SECTION 6 ELECTRICAL SCHEMA TICS Wiring Diagram, E208-240V, PS724E 61567B ...

  • Middleby Marshall PS724E - page 44

    SECTION 6 ELECTRICAL SCHEMATICS 40 Wiring Diagram, E380V 17.44 kW, PS724E 61577B ...

  • Middleby Marshall PS724E - page 45

    41 SECTION 6 ELECTRICAL SCHEMATICS Wiring Diagram, E380V 17.4 kW, PS724E CE 61581B ...

  • Middleby Marshall PS724E - page 46

    SECTION 6 ELECTRICAL SCHEMATICS 42 Wiring Diagram, 400-416V 4 kW, PS724E7 61534B ...

  • Middleby Marshall PS724E - page 47

    43 SECTION 6 ELECTRICAL SCHEMATICS NOTES ...

  • Middleby Marshall PS724E - page 48

    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 Equipment Service Association (CFESA). We recognize and applaud CFESA's ongoing efforts to improve the quality of technical service in the industry. W ...

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