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©2003 Middleby Marshall Inc.

MiddlebyMiddlebyMiddlebyMiddlebyMiddlebyMarshallMarshallMarshallMarshallMarshall

A MIDDLEBY COMPANY

PS540-Series Gas Ovens: EnglishNovember 12, 2008 Rev.B

owner'soperating& installation

manualPS540-Series OVENS

Model PS540G

PS540 (Triple)PS540 (Double)

Part No. 50664Price $30.00

P: 11/08

®

PS540 (Single)

ii

WARNINGFOR YOUR SAFETY, DO NOT STORE OR USE

GASOLINE OR OTHER FLAMMABLE VAPORS ANDLIQUIDS IN THE VICINITY OF THIS OR ANY OTHER

APPLIANCE.

WARNINGPOST, IN A PROMINENT LOCATION, THE EMERGENCY PHONENUMBER OF YOUR LOCAL GAS SUPPLIER AND INSTRUCTIONSTO BE FOLLOWED IN THE EVENT YOU SMELL GAS.

INSTRUCTIONS TO BE FOLLOWED IN THE EVENT THE USER SMELLS GASSHALL BE OBTAINED BY CONSULTING YOUR LOCAL GAS SUPPLIER. IFTHE SMELL OF GAS IS DETECTED, IMMEDIATELY CALL THE EMERGENCYPHONE NUMBER OF YOUR LOCAL GAS SUPPLIER. THEY WILL HAVE THEPERSONNEL AND PROVISIONS AVAILABLE TO CORRECT THE PROBLEM.

WARNINGImproper installation, adjustment, alteration, service, ormaintenance can cause property damage, injury, ordeath. Read the installation, operation, and maintenanceinstructions thoroughly before installing or servicing thisequipment.

NOTICEThe warranty is NOT VALID unless the oven is installed, started, anddemonstrated under the supervision of a factory-authorized installer.

NOTICEContact your authorized Service Agency to perform maintenance and

repairs. A Service Agency Directory is supplied with your oven.

NOTICEUsing any parts other than genuine Middleby Marshall factory-manufacturedparts relieves the manufacturer of all warranty and liability.

NOTICEMiddleby Marshall (Manufacturer) reserves the right to

change specifications at any time.

KEEP THIS MANUAL IN A VISIBLE LOCATION NEAR THE OVENFOR FUTURE REFERENCE.

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, without charge, F.O.B. Seller’s factory,any part found to be defective and any labor and material expenseincurred by Seller in repairing or replacing such part. Such warrantyis limited to a period of one year from date of original installation or15 months from date of shipment from Seller’s factory, whichever isearlier, provided that terms of payment have been fully met. All laborshall be performed during regular working hours. Overtime premiumwill be charged to the Buyer.

This warranty is not valid unless equipment is installed, started,and demonstrated under the supervision of a factory-autho-rized installer.

Normal maintenance functions, including lubrication, adjustment ofairflow, thermostats, door mechanisms, microswitches, burnersand pilot burners, and replacement of light bulbs, fuses and indicat-ing lights, are not covered by warranty.

Any repairs or replacements of defective parts shall be performed bySeller’s authorized service personnel. Seller shall not be respon-sible for any costs incurred if the work is performed by other thanSeller’s authorized service personnel.

When returning any part under warranty, the part must be intact andcomplete, without evidence of misuse or abuse, freight prepaid.

Seller shall not be liable for consequential damages of any kindwhich occur during the course of installation of equipment, or whichresult from the use or misuse by Buyer, its employees or others ofthe equipment supplied hereunder, and Buyer’s sole and exclusiveremedy against Seller for any breach of the foregoing warranty orotherwise shall be for the repair or replacement of the equipment orparts thereof affected by such breach.

The foregoing warranty shall be valid and binding upon Seller if andonly if Buyer loads, operates and maintains the equipment suppliedhereunder in accordance with the instruction manual provided toBuyer. Seller does not guarantee the process of manufacture byBuyer or the quality of product to be produced by the equipmentsupplied hereunder and Seller shall not be liable for any prospectiveor lost profits of Buyer.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IN LIEU OFALL OTHER EXPRESS AND IMPLIED WARRANTIES WHATSO-EVER. SPECIFICALLY THERE ARE NO IMPLIED WARRANTIESOF MERCHANTABILITY OR OF FITNESS FOR A PARTICULARPURPOSE.

The foregoing shall be Seller’s sole and exclusive obligation andBuyer’s sole and exclusive remedy for any action, whether in breachof contract or negligence. In no event shall seller be liable for a sumin excess of the purchase price of the item.

Model No.Modéle No.

Serial No.Serié No.

Installation DateDate d'installation

MIDDLEBY MARSHALLNO QUIBBLE LIMITED WARRANTY

(U.S.A. ONLY)

MIDDLEBY MARSHALL, HEREINAFTER REFERRED TO AS“THE SELLER”, WARRANTS EQUIPMENT MANUFACTUREDBY IT TO BE FREE FROM DEFECTS IN MATERIAL ANDWORKMANSHIP FOR WHICH IT IS RESPONSIBLE. THESELLER’S OBLIGATION UNDER THIS WARRANTY SHALLBE LIMITED TO REPLACING OR REPAIRING, AT SELLER’SOPTION, WITHOUT CHARGE, ANY PART FOUND TO BEDEFECTIVE AND ANY LABOR AND MATERIAL EXPENSEINCURRED BY SELLER IN REPAIRING OR REPLACINGSUCH PART. SUCH WARRANTY SHALL BE LIMITED TOTHE ORIGINAL PURCHASER ONLY AND SHALL BE EFFEC-TIVE FOR A PERIOD OF ONE YEAR FROM DATE OF ORIGI-NAL INSTALLATION, OR 18 MONTHS FROM DATE OF PUR-CHASE, WHICHEVER IS EARLIER, PROVIDED THAT TERMSOF PAYMENT HAVE BEEN FULLY MET.

This warranty is valid only if the equipment is installed, started,and demonstrated under the supervision of a factory-autho-rized installer.

Normal maintenance functions, including lubrication, clean-ing, or customer abuse, are not covered by this no quibblewarranty.

Seller shall be responsible only for repairs or replacementsof defective parts performed by Seller’s authorized servicepersonnel. Authorized service agencies are located in prin-cipal cities throughout the contiguous United States, Alaska,and Hawaii. This warranty is valid in the 50 United Statesand is void elsewhere unless the product is purchasedthrough Middleby International with warranty included.

The foregoing warranty is exclusive and in lieu of all otherwarranties, expressed or implied. There are no impliedwarranties of merchantability or of fitness for a particu-lar purpose.

The foregoing shall be Seller’s sole and exclusive obligationand Buyer’s sole and exclusive remedy for any action, in-cluding breach of contract or negligence. In no event shallSeller be liable for a sum in excess of the purchase price ofthe item. Seller shall not be liable for any prospective or lostprofits of Buyer.

This warranty is effective on Middleby Marshall equip-ment sold on, or after, February 15, 1995.

© 2003 - Middleby Marshall, A Middleby Company.The Middleby Marshall logo is a registered trademark of Middleby Marshall, A Middleby Company.

Middleby Marshall Inc. • 1400 Toastmaster Drive • Elgin, Illinois 60120-9272 U.S.A. • (847) 741-3300 • FAX: (847) 741 4406

iv

NOTEWiring 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

PageSECTION 1

I. MODEL IDENTIFICATION .............................................. 1SERIES PS540 ELECTRICAL SPECIFICATIONS ............. 2II. PRINCIPLE OF AIR FLOW ............................................. 3

A. Heat Transfer and How It Works .............................. 3II. PRINCIPLE OF AIR FLOW (Continued) ........................ 4

B. Air Fingers ................................................................. 4III. COMPONENT FUNCTION ............................................ 5

A. Conveyor Motor and Conveyor Belt ........................ 6B. Blower Fan ................................................................. 6C. Gas Burner ................................................................ 6D. Window ....................................................................... 6E. Cooling Fan ................................................................ 7F. Air Fingers and Blank Plates - See Figure 1-9 ......... 8

SECTION 2I. UNLOADING ................................................................... 9

PS540 OVEN INSTALLATIONREQUIRED KITS AND EQUIPMENT ........................ 10

PARTS LIST FOR SERIES PS540 GAS OVENINSTALLATION KIT P/N 50633 ................................ 10

PARTS LIST FOR PS540 SERIES SINGLE OVENOPTION - BASE W/15″″″″″ LEGS & TOP P/N 34832 ..... 11

PARTS LIST FOR PS540 SERIES DOUBLE OVENOPTION - BASE W/6″″″″″ LEGS,CASTERS & TOP P/N 34833 .................................... 12

PARTS LIST FOR PS540 SERIES TRIPLE OVENOPTION - BASE w/OUTRIGGERS & TOP

P/N 34831 ................................................................... 13RESTRAINT CABLE INSTALLATION.......................... 16UTILITY ROUGH-IN DIMENSIONS AND POSITIONING

FOR PS540-SERIES OVENS .................................... 17ELECTRICAL SAFETY SWITCH .................................. 17ELECTRICAL SPECIFICATIONS ................................. 17GAS RATING ................................................................ 17MINIMUM GAS METER RATING .................................. 17MINIMUM GAS PIPE SIZE ............................................ 17GAS SAFETY VALVE ................................................... 17REQUIRED GAS SUPPLY PRESSURE....................... 17SUGGESTED ................................................................ 17User supplied Items..................................................... 17

II. VENTILATION GUIDELINES ....................................... 18VENTILATION HOOD ................................................... 18VENTILATION CAPTURE TEST................................... 18

III. ELECTRICAL CONNECTION INFORMATION FORPS540-SERIES OVENS. ........................................... 19

IV. ELECTRIC SUPPLY FOR GAS-HEATED OVENS ..... 19V. GAS SUPPLY FOR GAS HEATED OVENS................. 20VI. CONVEYOR REAR STOP AND

END STOP INSTALLATION ...................................... 22SECTION 3 INSTALLATION

I. CONTROL FUNCTIONS ................................................ 23II. COMPONENT INFORMATION AND LOCATION ......... 24

A. Door Safety Switch .................................................. 24B. Blower Switch .......................................................... 24C. Heat Switch .............................................................. 24D. Temperature Controller .......................................... 24E. Conveyor ................................................................. 25MEASURING CONVEYOR SPEED. ............................. 25

III. STEP-BY-STEP OPERATION ..................................... 26A. Startup Procedures ................................................. 26

TABLE OF CONTENTS(Continued)

PageDaily Startup ................................................................. 26Power Failure ............................................................... 26B. Shutdown Procedure ............................................... 26A.Daily Startup Procedure .......................................... 26

IV. NORMAL OPERATION - STEP-BY-STEP .................. 26V. QUICK REFERENCE: TROUBLESHOOTING ............. 30

SECTION 4 MAINTENANCEI. MAINTENANCE - DAILY ........................................... 32A. Exterior .................................................................... 32B. Cooling Fan .............................................................. 32C. Conveyor Belt ......................................................... 32D. Crumb Pans ............................................................ 32E. Window .................................................................... 32

II. MAINTENANCE - MONTHLY ...................................... 33A. Removing Conveyor From Oven For Cleaning .... 33B. Air Fingers Disassembly For Cleaning ................. 35C. Cleaning the Window .............................................. 36D. Reassembly of Air Fingers .................................... 36E. Reinstall End Plugs ................................................. 39F. Conveyor Reassembly Into Oven .......................... 40G. Checking Conveyor Belt Tension ......................... 40H. Conveyor Belt Link Removal ................................ 41I. Replacing Conveyor Belt ......................................... 42J. Attaching Drive Chain ............................................ 42

III. MAINTENANCE - EVERY 3 MONTHS ........................ 43A. Cleaning the Blower/Fan Motor ............................. 43B. Electrical Terminals ............................................... 44C. Ventilation ............................................................... 44D. Checking the Blower/Fan Belt ............................... 44E. Blower Fan Shaft Bearing Lubrication .................. 45F. Split-belt Conveyor Shaft Cleaning ....................... 45IV. MAINTENANCE - EVERY 6 MONTHS .................... 47PS540-SERIES GAS OVEN KEY SPARE PARTS KIT ......................................... 48

SECTION 5 TROUBLESHOOTINGTroubleshooting Charts ..................................................... 49SECTION 6 - PARTS LIST

OVEN PANELS, WINDOW AND LEGS ............................ 53CONTROL PANEL ........................................................... 55BLOWER AND SHROUD ................................................. 57CONVEYOR ...................................................................... 59SPLIT BELT CONVEYOR ................................................. 61GAS BURNER AND PIPING ASSEMBLY ....................... 63MACHINERY COMPARTMENT ....................................... 65

SECTION 7 ELECTRICAL SCHEMATICSWiring Diagram, G208-240 50/60, 1PH 3W PS540 ........ 67

SECTION 1DESCRIPTION

1

I. MODEL IDENTIFICATION

The Middleby Marshall PS540-Series may be used eitheras a single oven or stacked for use as double or tripleovens. The major difference between the oven models inthis series is the width of the conveyor.

A single PS540-Series Oven (Figure 1-1) is mounted on abase pad with legs and casters. A double oven (Figure 1-2)consists of two, stacked, single ovens. A triple oven(Figure 1-3) consists of three stacked single ovens. Thelower oven is mounted on a base pad with short legs andcasters.

On a double or triple oven, the ovens operate completelyindependent. All ovens use identical controls and compo-nents. One oven can be cleaned or serviced, while theothers are operating.


Figure 1-1. Single PS540 Oven

Figure 1-2. Double PS540 Oven

Figure 1-3. Triple PS540 Oven

2


PS540 SERIES OVEN SPECIFICATIONSConveyor Belt Width 32″ (813mm)

Heating Zone Length 40-1/2″ (1028mm)

Baking Area Square Feet 9 sq. ft. (0.84 sq. m.)

Overall Dimension Standard Single Oven w/Legs 80″ (2032mm) L ×

61-5/16″ (1557mm) W ×47-5/16″ (1202mm) H ×

Overall Dimension Double Oven 80″ (2032mm) L ×

61-5/16″ (1557mm) W ×60-15/16″ (1548mm) H x

Overall Dimension Triple Oven 80″ (2032mm) L x

61-5/16″ (1557mm) W ×77-1/2″ (1969mm) H ×

Weight of Single Oven 925 lb (419kg)

Shipping Weight 1,100 lb (498.3kg)

Shipping Cube Approx. 132 ft3 (3.74 m3)

Operating Range 110,000 BTU/hr(116.0 mJ/h)(27,720 kcal)(32.2 kW/hr)

Maximum Operating Temperature 550°F (287°C)

Warm-up Time 10 min.

Gas Oven Inlet Line Size 3/4″ (19mm) ID for each oven

Minimum Gas Meter Rating 450 cu.ft./hr. (12.74m3h) for 1 to 2 ovensAdd 180 cu.ft./hr (5.1m3h) for each additional oven

Minimum Gas Pipe Size Natural (must be dedicated line) 2″ (51mm) ID for 1, 2, or 3 ovens Propane (must be dedicated line) 2″ (51mm) ID for 1, 2, or 3 ovens

Gas Pressure Natural 6″ to 12″ Water Column (13.8 to 29.9 mbar) Propane 11.5″ to 12″ Water Column (28.7 to 29.9 mbar)

Gas Valve 0.75″ (19mm) ID full-flow, gas, shutoff valve installed in oven inlet gas line.A separate connection and valve must be provided for each oven.

Recirculating Air Fan One fan at 2300 RPM

Air Velocity 3000 fpm (1524 cm/sec) (Average)

Bake Time 3 min. 0 sec. Bake Time minimum30 min. 0 sec. Bake Time maximum

SERIES PS540 ELECTRICAL SPECIFICATIONSMain Blower & Control Circuit Phase Frequency Amperage Poles Wires

Elements Voltage Voltage Draw

208-240V 208-240V 1 Ph 50/60 Hz 4.1 Amp 3 Pole 3 Wire(2 hot, 1 grd)

NOTEWiring Diagrams are contained in Section 7 of this Manual

and are also located inside the oven at thebottom of the Control Panel

This Manual Must Be Kept For Future Reference

Inlet1.13 kPa2.75 kPa

Test Power0.87 kPa2.39 kPa


3

II. PRINCIPLE OF AIR FLOW

The fan-style blower draws air into the oven plenum whereit is heated. The blower then pushes the hot air through theair fingers into the baking chamber. Each air fingercontains an inner plate and outer plate that form the hot airinto jets, distributing it across a conveyor belt on which thefood product rides. Air is then pulled back into the blowerand the process continues. The curving, black arrows ofFigure 1-4 show this air flow.

A. Heat Transfer and How It Works

1. Heat constantly moves from a warm object to a coldobject. Heat moves using three different paths: Conduc-tion; Radiation; and Convection.

Conduction: This path utilizes surface-to-surface con-tact. The pizza dough in contact with the pan is a goodexample of conduction.

Radiation: This path has to do with objects radiating heat.Dark objects absorb heat whereas light or shiny objects

reflect more heat. This is the reason that the inside of aPS540-Series Oven is light in color: To reflect more heatback onto the food product.

Convection: This path has to do with moving a volume ofair. It explains why hot air rises and cooler air replaces hotair. An industrial application of this principle is to incorpo-rate a fan to force the hot air movement, which in turnincreases the heat transfer to the food product.

Each PS540-Series Oven has a large fan-style blower tomove the hot air through the air fingers and onto theproduct to cook/bake the food product most efficiently.

2. Temperature is the intensity of heat at the point whereit is sensed. As discussed above, heat flows by conduc-tion, radiation and convection. The speed at which the heatflows is determined by the temperature difference betweenthe oven and the food product. The larger the difference,the faster the heat flows to the item that is being baked.

Upper Air Fingers

Lower Air Fingers

Conveyor Belt(s)

Window

Figure 1-4. PS540-Series Oven Air Flow

4


Series ovens used to bake pizza have four bottom fingersand two top fingers. For special product baking require-ments, a number of other styles of fingers and fingerarrangements are available from the factory.

NOTE: Some customers have a predetermined fingerarrangement. If you have any questions pertaining to thefinger arrangement, please call the factory.

Air Flow From Plenum

Manifold

Manifold Baffle

Outer Plate

Inner Plate

Air Flow From Plenum

Manifold

Manifold Baffle

Outer Plate

Inner Plate

High Velocity Columns of Air on Food Product

II. PRINCIPLE OF AIR FLOW (Continued)

B. Air Fingers

The PS540-Series Ovens are conveyorized ovens thatemploy vertical jets of hot air streaming from air fingers(Figure 1-5) to give uniform, intense heating. The verticalstreams of hot air provide an exceptional heat transfer rateand generally bake faster and at lower temperatures thanconvection hot air or infrared heating ovens.

A PS540-Series Oven can accommodate up to fourbottom air fingers and four top air fingers. Some PS540-

Figure 1-5. Air Fingers, Showing High-Velocity Columns of Air Formed During Passage Throughthe Inner Plate and Outer Plate to Heat the Food Product.


5

III. COMPONENT FUNCTION (Figure 1-6)

Figure 1-6. PS540-Series Oven Components Locations

6


III. COMPONENT FUNCTION

A. Conveyor Motor and Conveyor Belt

The conveyor belt is driven by a variable-speed electricmotor (Figure 1-7) operating through a gear reducer. Themotor speed is controlled by a digital control. The stain-less-steel wire belt can travel in either direction at variablerates ranging from 3 minutes to 30 minutes; this is the timethat a product can take to pass through the oven.

B. Blower Fan

The blower fan is located at the rear of the oven. Thisblower forces heated air through the air fingers. TheBLOWER switch must be set to “ON” or “I” for ovenwarmup and baking.

Figure 1-7. Machinery Compartment Components

Left Control Box Right Control Box

C. Gas Burner

Turning the HEAT switch to “1” activates the oven purgecircuit. After approximately 30 seconds, the solid-stateignition control lights a pilot burner by an electric spark.This system permits the main gas valve to open only afterthe lighting of the pilot burner is detected by the flamesensor.

If the pilot flame does not light or a loss of flame occurs,the main gas valve closes.

The main burner gas is extinguished when the HEATswitch is set to “OFF” or “O”.

D. Window

A window on the front of the oven permits viewing the itemsbeing baked and provides access to the oven for items thatdo not require full baking time, such as sandwiches,cookies, small items, or cheese-melting processes.


7

Figure 1-8. Cooling Fan

Cooling Fan Grille

E. Cooling Fan — See Figure 1-8

The cooling fans are located in the back of the oven.These cooling fans draw air through its grille, blowing itthrough the blower motor compartment and the controlcompartment into the oven top and exhausted out the frontlouvers.

8


Half Blank Plate

Blank Plate

Outer Plate

Inner Plate

Finger Manifold Assembly

Baffle

Figure 1-9. Blank Plates (two sizes) and an Air Finger.

F2. Blank Plates

1. Blank Plates- The Blank Plates are available to installon the plenum where an air finger is not required.

F. Air Fingers and Blank Plates - See Figure 1-9

F1. Air Fingers

An Air Finger Assembly is made up of three parts:

1. Outer Plate - The Outer Plate is the removable coveringwith tapered holes, which direct the air stream onto theproduct being baked.

2. Inner Plate -The perforated Inner Plate is vital in formingthe unique air jets. It must be assembled into the manifoldwith its holes aligned with the holes of the outer plate.

3. Manifold - The Manifold is the assembly which slideson tracks into the oven plenum.

SECTION 2INSTALLATION

9


NOTE: In U.S.A., the oven installation must conform withlocal codes, or in the absence of local codes, with theNational Fuel Gas Code, ANSI Z223.1 latest edition. Theoven, when installed, must be electrically grounded inaccordance with local codes, or in the absence of localcodes, with the National Electrical Code (NEC), orANSI/NFPA70.

NOTE: In Canada, the oven installation must conform withlocal codes, or in the absence of local codes, with theNatural Gas Installation Code, CAN/CGA-B149.1, or thePropane Gas Installation Code, CAN/CGA-B149.2, asapplicable. The oven, when installed, must be electricallygrounded in accordance with local codes, or in the ab-sence of local codes, with the Canadian Electrical CodeCSA, C22.2, as applicable.

NOTE: For Australian installation, the oven must beinstalled only by an authorised person in accordance withAS5601, local authority, gas, electricity, any applicablestatutory regulations and manufacturer requirements.

NOTEThere must be adequate clearance betweenthe oven and any adjacent combustible con-struction. Clearance must also be providedfor servicing and for operation.

CAUTIONIt is required that the oven be placed under aventilation hood for adequate air supply andventilation.

CAUTIONDo not obstruct the flow of combustion andventilation air to and from your oven. Do notobstruct the ventilation holes in the Control Panel.

CAUTIONOn ovens with the Machinery Drive Compartmentlocated at the right end, a minimum clearance of 0″to a left side wall, 18″ to a right side wall and 6″ froma back wall to air openings at the rear of the ovenmust be maintained. On ovens with the machinery/drive compartment located at the left end, a mini-mum clearance of 0″ to a right side wall, 18″ to a leftside wall and 6″ from a back wall to air openings atthe rear of the oven must be maintained.

For servicing and cleaning, a minimum of 18″clearance from all walls is recommended.

I. UNLOADING

Your Middleby Marshall PS540-Series Oven is shippedpartially assembled. It will arrive in a carton on a crate.

Carton size for a PS540-Series Oven is:

84″ (2134mm) Long ×

58″ (1473mm) Wide ×

44″ (1118mm) High ×

The crate and carton must be examined before signing theBill of Lading. Report any visible damage to the transportcompany, and check for the proper number of crates. Ifapparent damage is found, make arrangements to file aclaim against the carrier. Surface Interstate CommerceRegulations (U.S.A.) require that the claim must beinitiated by the consignee within 10 days from the date thatthe shipment is received.

A Pre-installation Procedures Manual (MM P/N 88910-0009)is attached to the exterior wall of the carton. This manualcontains detailed instructions on unpacking and moving theoven(s) to the operating site. When the transport companynotifies you of an impending delivery, arrange to have a forkliftat your facility to unload the carton(s).

Instructions for stacking the ovens is continued in aseparate manual used by Middleby Marshall AuthorizedInstallers.

If you have a door wider than the carton, simply move thecarton into your facility and arrange an appointment withyour Middleby Marshall Authorized Installer.

If your door is narrower than the carton, then the oven willhave to be unpacked. Follow the directions shown in thePre-Installation Procedures Manual.

10


PS540 OVEN INSTALLATIONREQUIRED KITS AND EQUIPMENT

TYPE PS540 PS540 Single PS540 Double PS540 Double PS540 TripleOF Gas Oven Oven Option Oven Option Oven Option Oven OptionINSTALLATION Installation Base w/15″ Legs, Base w/6″ Legs, Base w/Casters Base w/Casters

Kit P/N Casters & Top Casters & Top & Top & Top50663 Kit P/N Kit P/N Kit P/N Kit P/N

34832 34833 34831 51139

PS540 Single Gas Oven 1 1

PS540 Double Gas Oven 2 1 1

PS540 Triple Gas Oven 3 1

PARTS LIST FOR SERIES PS540 GAS OVENINSTALLATION KIT

P/N 50633(Two required for double oven)(Three required for triple oven)

ITEMNO. QTY PART NO. DESCRIPTION

1 1 22361-0001 FLEXIBLE GAS HOSE

2 1 35000-1103 CONVEYOR END STOP

3 1 35900-0148 CONVEYOR LEFT REAR STOP

4 1 50664 SERIES PS540 OWNER/OPERATOR MANUAL

5 1 1002040 SERVICE AGENCY DIRECTORY

6 1 33900-0032 CONVEYOR WIRE BELT

2

3

5

6

1

4

Figure 2-1. PS540-Series Gas OvenInstallation Parts


11

PARTS LIST FOR PS540 SERIES SINGLE OVEN OPTION - BASE w/15″″″″″ LEGS & TOPP/N 34832


1 1 37900-0025 COMPLETE BASE WELDMENT2 4 37900-0024 TOP PLATE, LEG WELDMENT3 2 22290-0009 SWIVEL CASTER W/BRAKE FLAT PLATE4 2 22290-0010 SWIVEL CASTER FLAT PLATE5 32 220373 3/8″-16 × 1″ HEX SCREW,SST6 32 21416-0001 3/8″ FLAT WASHER, SS7 32 21422-0001 3/8″ SPLIT LOCK WASHER, ZP8 4 21256-0008 SCREWS FOR TOP 10-32 × 3/8″ 18-8, SL TRUS S9 1 22450-0228 RESTRAINT CABLE ASSEMBLY

10 1 33486 TOP COVER 304 PANEL

Figure 2-2. Model PS540 Single OvenOption Base with Legs and Top

12


PARTS LIST FOR PS540 SERIES DOUBLE OVEN OPTION - BASE w/6″″″″″ LEGS, CASTERS & TOPP/N 34833


1 1 37900-0025 COMPLETE BASE WELDMENT2 4 37900-0102 TOP PLATE, LEG WELDMENT3 2 22290-0009 SWIVEL CASTER W/BRAKE FLAT PLATE4 2 22290-0010 SWIVEL CASTER FLAT PLATE5 32 220373 3/8″-16 × 1″ HEX SCREW,SST6 32 21416-0001 3/8″ FLAT WASHER, SS7 32 21422-0001 3/8″ SPLIT LOCK WASHER, ZP8 4 21256-0008 SCREWS FOR TOP 10-32 × 3/8″ 18-8, SL TRUS S9 1 22450-0228 RESTRAINT CABLE ASSEMBLY

10 1 33486 TOP COVER 304 PANEL

Figure 2-3. Model PS540 Double OvenOption Base with Legs and Top


13

PARTS LIST FOR PS540 SERIES TRIPLE OVEN OPTION - BASE w/CASTERS & TOPP/N 51139


1 1 54606 COMPLETE BASE WELDMENT2 4 45209 QUAD OUTRIGGER WELDMENT3 2 22290-0009 SWIVEL CASTER, W/BRAKE FLAT PLATE4 2 22290-0010 SWIVEL CASTER, FLAT PLATE5 4 45206 INSERT,QUAD ADJUSTMENT FOOT6 4 45205 SPACER,QUAD CASTER7 32 220373 3/8″-16 × 1″ HEX BOLT, SST8 32 21416-0001 3/8″ FLAT WASHER, SS9 32 21422-0001 3/8″ SPLIT LOCK WASHER, ZP

10 16 21172-0004 3/8″-16 NYLON INSULATED LOCKNUT, ZC11 8 21216-0018 1/2″-13 × 1-1/4″ 18-8 HEX CAPSCREW12 8 21416-0003 1/2″ 18-8 FLAT WASHER13 8 21426-0004 1/2″ 18-8 LOCK WASHER14 4 21256-0008 SCREWS FOR TOP 10-32 × 3/8″ 18-8, SL TRUS S15 1 22450-0228 RESTRAINT CABLE ASSEMBLY16 1 33486 TOP COVER 304 PANEL

Figure 2-4. Model PS540 Triple OvenOption Base with Outriggers and Top

14


Figure 2-5. MODEL PS540 SINGLE OVEN DIMENSIONS

GAS INLET

ELECTRICAL JUNCTION BOX

RECOMMENDED MINIMUM CLEARANCES:Rear of Oven to Wall - 6″ (150mm)Non-control End of Oven to Wall - 0″Control End of Oven to Wall - 0″

1

2

3

2

3

3

3

1


15

Figure 2-6. MODEL PS540 DOUBLE OVEN DIMENSIONS

GAS INLET



1

2

3

2

3

3

3

1

16


RESTRAINT CABLE INSTALLATION

Install the restraint cable assembly on the oven, as shownin Figure 2-6.

Figure 2-7. MODEL TRIPLE OVEN DIMENSIONS

GAS INLET



1

2

3

Figure 2-8. Restraint Cable Assembly Installation

2

3

3

3

1


17

WARNINGDO NOT USE CONDUIT OR GAS LINEFOR GROUND CONNECTION.

CAUTIONIT IS REQUIRED THAT THE OVEN BEPLACED UNDER A VENTILATIONHOOD FOR ADEQUATE AIR SUPPLYAND VENTILATION.

ELECTRIC AND GAS SUPPLY TO BEPROVIDED BY CUSTOMER

ELECTRICAL SAFETY SWITCH

15 Amp circuit breaker / fused disconnect switch withlockout/tagout electrical shutoff for each oven. Wireeach oven separately.

ELECTRICAL SPECIFICATIONS

DOMESTIC or EXPORT: 208-240V blower motor,1 phase, 4.1 Amp draw, 50/60 Hz, 208-240V controlcircuit, 2 poles, 3-wire system per oven (2 hot, 1 grd).

Do NOT use conduit for ground.

GAS RATING

Model PS540 is 110,000 BTU/hour, 116.0 mJ/h (27,720 kcal),32.2 kW/hr.

MINIMUM GAS METER RATING

450 ft3/hour (12.6m3/h) for 1 or 2 ovens;

Add 180 cu. ft./hr (5.1 m3/h) for each additional oven.

Minimum rating does not take other gas appliances intoconsideration. Gas consumption varies at each site. TotalBTU/hr (kcal/hr) must be calculated during high flameoperation for each appliance to determine if the meterneeds to be larger.

MINIMUM GAS PIPE SIZE

Natural: 2″ (51mm) ID for 1, 2, or 3 ovens with runs upto 200 ft. (61m).Must be a dedicated line.

Runs over 200 ft, (61m) consult factory.

Propane: 2″ (51mm) ID for 1, 2, or 3 ovens with runs upto 200 ft. (61m).Must be a dedicated line.

Runs over 200 ft, (61m) consult factory.

UTILITY ROUGH-IN DIMENSIONS AND POSITIONING FOR PS540-SERIES OVENS

GAS SAFETY VALVE

A 3/4″ (19mm) ID (inner diameter) full-flow, gas shutoffvalve. A separate connection and valve must be providedfor each oven, as shown in Figure 2-9.

REQUIRED GAS SUPPLY PRESSURE

Natural: 6″ to 12″ water column (13.8 to 29.9 mbar)

Propane: 11.5″ to 12″ water column (28.7 to 29.9 mbar)

SUGGESTED

If space permits, electric and gas service should belocated near the control console end of the oven(s) to allowconvenient access to safety switches and valves.

USER SUPPLIED ITEMS (Figure 2-9)

ITEM DESCRIPTION

1 2″ (51mm) × 2″ (51mm) × 3/4″ (19mm) TEE2 3/4″ (19mm) × 3″ (76mm) NIPPLE3 3/4″ (19mm) FULL FLOW GAS SHUTOFF VALVE

4 2″ (51mm) × 3/4″ (19mm) 90° REDUCER ELBOW5 2″ (51mm) ID GAS SUPPLY PIPE LINE - NATURAL GAS6 15 AMP TOGGLE SWITCH - 2 POLE for GAS

Figure 2-9. Typical PS540-Series Oven(s)Installation

24"610mm

6ON

OFF

13-1/2"343mm

2

32

6ON

OFF

24"610mm

2

32

27"686mm

4

5

1

Suggested dimensions are shown; utility code requirements supersede any factors shown.

18


II. VENTILATION GUIDELINES

A mechanically driven ventilation system is required forthe PS540 Series Middleby Marshall conveyorized gasovens. The minimum hood canopy dimensions are out-lined below.

Local codes and conditions vary greatly from one area toanother and must be complied with. Following are thesuggested requirements for good ventilation. Please re-member these are recommendations or guidelines, youmay have a special condition or problem that will requirethe services of a ventilation engineer or specialist. Properventilation is the oven owner’s responsibility. Improperventilation can inhibit oven performance. It is recom-mended that the ventilation and duct work be checked outevery three months. Grease filters in the intake of the hoodmay be required by local codes.

VENTILATION HOOD

The rate of air flow exhausted through the ventilationsystem is generally between 1400 and 2500 cu. ft./min. (40and 70 m3/min), but may vary depending on the ovenconfiguration and hood design. To avoid a negative pres-sure condition in the kitchen area, return air must bebrought back to replenish the air that was exhausted. Anegative pressure in the kitchen can cause heat relatedproblems to the oven components as if there were noventilation at all. The best method of supplying return airis through the heating, ventilation and air conditioningsystem. Through they system, the air can be temperaturecontrolled for summer and winter. Return air can bebrought in directly from outside the building, but detrimen-tal affects can result from either extreme seasonal hot andcold temperature from the outdoors.

NOTE: Return air from fan driven system within the hoodmust not blow at opening of bake chamber or poor ovenbaking performance will result.

VENTILATION CAPTURE TEST

It is recommended that a 30 second smoke candle test beperformed on your ventilation hood system. Follow thesteps below to complete the ventilation smoke test.

All tests are to be done on single ovens or lower units ofa double or triple oven. We recommend you wearprotective gloves when performing this test. At no timeshould food be present when the smoke test is beingconducted. Also check that no fire suppression systemwill be activated by the smoke.

1. Turn ventilation system on.

2. Turn oven(s) on and allow to heat up to customersnormal operating temperature, or a minimum of480°F (248°C).

3. Turn conveyor off. Place a 30 second smoke candle ina pie or cake pan which is no higher than 3″ (76mm).

4. Open the front oven window. Next, light the smokecandle in the pan and then slide the pan into the center ofthe bake chamber on the conveyor belt and close thewindow.

5. The ventilation hood should capture 90% to 100% of thesmoke produced by the candle.

Figure 2-10. Vent Hood

1″ (25mm)minimum

8″ (203mm)minimum

18″(458mm)minimum

21-1/2″(546mm)minimum

2″ (51mm)minimum.To allow

stacking ofovens.


19

III. ELECTRICAL CONNECTIONINFORMATION FOR PS540-SERIESOVENS.

WARNING

Authorized supplier personnel normally accom-plish the connections for the ventilation system,electric supply, and gas supply, as arranged bythe customer. Following these connections, thefactory-authorized installer can perform the initialstartup of the oven.

Check the oven data plate (Figure 2-11) before making anyelectric supply connections. Electric supply connectionsmust agree with data on the oven data plate.

NOTE: The electric supply installation must satisfy therequirements of the appropriate statutory authority, suchas the National Electrical Code (NEC), ANSI/NFPA70,(U.S.A.); the Canadian Electrical Code, CSA C22.2; theAustralian Code AG601; or other applicable regulations.

A fused disconnect switch or a main circuit breaker(customer furnished) MUST be installed in the electricsupply line for each oven; it is recommended that thisswitch/ circuit breaker have lockout/tagout capability. Theelectric supply connection must meet all national and localelectrical code requirements. Copper is the recommendedmaterial for the electrical supply conductors.

IV. ELECTRIC SUPPLY FOR GAS-HEATED OVENS

Supply voltages for all gas ovens (except one 200 - 220Voven for export) can range from 208 to 240VAC, 1 phase.Ampere requirements for each oven can be handled via afused disconnect switch or main circuit breaker.

NOTE: The electric supply installation must satisfy therequirements of the appropriate statutory authority, suchas the National Electrical Code (NEC), ANSI/NFPA70,

(U.S.A.); the Canadian Electrical Code, CSA C22.2; theAustralian Code AG601; or other applicable regulations.

The supply conductors must be of the size (#14 AWG,copper) recommended. (Refer to the wiring diagrams ofSection 7.) All gas oven electric supply connections aremade via the electrical junction box on the rear of the oven(Figure 2-12). The power lines then connect through anoven safety switch (on the control console door frame) tothe oven circuits. Opening the door interrupts electricpower to the oven.

CAUTIONBefore connecting incoming power to the oven,measure the voltage of each input leg toneutral. The expected voltage is approximately120 volts. Any voltage reading exceeding 130volts indicates that the supply has a ‘high’ leg.CONNECTING A ‘HIGH’ LEG TO THE OVENVOIDS ALL OVEN WARRANTIES. Connectinga ‘high’ leg to the black lead of the oven canseverely damage the oven’s electrical andelectronic components.

CAUTIONDO NOT CONNECT BLACK

WIRE TO HIGH LEG.VOLTAGE OF THE BLACK AND

WHITE WIRES MUST BE NOHIGHER THAN 130 VAC

Contact an electrician or the electric power supply com-pany to remove the ‘high’ leg from the electric supplyline(s) to the oven.

In the junction box on the rear of the oven, connect one208 - 240V supply line to the black wire and the other208 - 240V supply line to the red wire. Connect thesupply neutral line to the white wire. Connect theelectric supply ground wire to the oven ground screwlocated in the main junction box. If necessary, havethe electrician supply the ground wire. Do NOT use thewiring conduit or other piping for ground connections!

Figure 2-11. Typical Gas Oven Data Plate

20


V. GAS SUPPLY FOR GAS HEATEDOVENS

WARNINGDuring gas line pressure testing, observe thefollowing precautions:

1. The oven and its individual shutoff valveMUST be disconnected from the gas supplypiping system during any pressure testing ofthat system at test pressures in excess of1/2 psig (3.45kPa).

2. The oven MUST be isolated from the gassupply piping system, by closing its individualshutoff valve, during any pressure testing of thatsystem at test pressures equal to, or less than,1/2 psig (3.45kPa).

3. If incoming gas line pressure exceeds14″w.c. (35mbar), a separate regulator MUST beinstalled in the line on the inlet side of the safetyvalve for the oven.

CAUTIONTo prevent damaging the control valve regulatorof the oven during initial turn-on of gas, theindividual shutoff valve MUST be opened veryslowly. After initial turn-on of gas, the individualshutoff valve should remain open except duringgas line pressure testing (refer to the precedingWARNING) and during necessary servicing andmaintenance procedures.

Check the oven data plate (Figure 2-11) before making anygas supply line connections. The type of gas (natural orpropane) being supplied to the oven must agree with dataon the oven data plate.

Certain safety code requirements exist for the installationof gas ovens; refer to the beginning of Section 2 for a listof the installation standards. In addition, because aPS540-Series oven is equipped with casters for accessi-bility during servicing, the gas line connection shall bemade with a connector that complies with the Standard forConnectors for Movable Gas Appliances, ANSI Z21.69 (inU.S.A.), or, if applicable, Connectors for Movable GasAppliances, CAN/CGA-6.16 (in Canada), as well as aquick-disconnect device that complies with the Standardfor Quick-Disconnect Devices for Use With Gas Fuel,ANSI Z21.41 (in U.S.A.), or, if applicable, Quick-Discon-nect Devices for Use With Gas Fuel, CAN6.9 (in Canada).

One gas line connection method is shown in Figure 2-13;however, the preceding requirements must be satisfied.The 90-degree elbow and the union shown in Figure 2-13are not furnished; however, the flexible gas line is part ofthe installation kit.

On an oven equipped with casters, a cable restraintassembly must be installed to limit the movement of theappliance, without depending on the connector and quick-disconnect device or its associated gas line installation.The location where the Cable Restraint Assembly is to beattached to the oven is illustrated in Figure 2-8.

Figure 2-12. Junction Connection Box

Electrical JunctionCover Plate


21

A. Connection

Check the oven’s gas supply requirements before making thegas utility connection. Gas supply requirement are listed onthe oven’s serial plate and in Table 1-4. Gas Orifice andPressure Specifications (in Section 1, Description).

Check the serial plate to determine the type of gas (Propaneor Natural) to be used with the oven.

Refer to the instructions in the gas hose package (includedin the Installation Kit) before connecting the gas line. Onegas line connection method is shown in Figure 2-18;however, compliance with the applicable standards andregulations is mandatory.

Inlet, regulated, and pilot gas pressure readings can betaken using a digital tube manometer at the tap location shownin Figure 2-19. Figure 2-19 shows the burner assembly andFigure 2-21 shows the gas valve.

NOTE: The installation must conform with local codes or inthe absence of local codes, with the National FuelGas Code, ANSI Z223.1-latest edition.

Certain safety code requirements exist for the installation of gasovens; refer to the beginning of Section 2 for a list of the installationstandards. In addition, because the oven is equipped with casters,the gas line connection shall be made with a connector thatcomplies with the Standard for Connectors for Movable GasAppliances, ANSI Z21.69 (in U.S.A.), as well as a quick-discon-nect device that complies with the Standard for Quick-DisconnectDevices for Use With Gas Fuel, ANSI Z21.41 (in U.S.A.).

B. Gas Conversion

Where permitted by local and national codes, it is possibleto convert ovens from natural to propane gas, or frompropane to natural gas. Use the appropriate Middleby GasConversion Kit for the specific oven model.

CAUTION: The terms of the oven’s warranty require all start-ups, conversions and service work to be performedby a Middleby Authorized Service Agent.

C. PS540 Propane Conversion

Two items have to be changed, to change the oven to LP:1. Replace main orifice.

2. Adjust main gas regulator per instructions below.

Disconnect the manifold union closest to the mainburner, and remove the manifold assembly. Replacethe main orifice.

Replace the main orifice on the manifold assemblies with theLP units, and replace the manifold assembly.D. Adjusting the Maximum Pressure Setting

1. Disconnect pressure feedback connection (if appcable).

2. Connect a suitable pressure gauge to pipe line or to outlet pressuretap of gas control concerned, to measure burner pressure (mea-suring point must be as near to burner as possible).

Figure 2-14. Gas Burner Assembly

Figure 2-13. Flexible Gas Hose Installation

To GasSupplyPipe

90°Elbow

Quick-disconnect

device

FlexibleGas Hose

Full-FlowGas

ShutoffValve

3/4″ gaspipe nipple

3/4″-1/2″gas pipereducer

Individual gasconnection for

each ovencavity

1/2″ gaspipe nipple

1/2″ gas linetee with

pressure tap

3. Make sure that the appliance is in operation and theModuplus® coil is energized with maximum current.

4. If maximum rate pressure needs adjustment, use an 8 mmwrench to turn adjustment screw for maximum pressuresetting (clockwise to increase or counter-clockwise todecrease pressure), until the desired maximum outletpressure is obtained.

5. Disconnect electrical connection of the Moduplus®.6. Check minimum pressure setting and readjust if neces-

sary. (See Adjusting Minimum Pressure Setting forproper adjusting procedure.)

7. Reconnect pressure feedback connection (if appcable).8. If minimum and maximum pressures are set, wire the

Moduplus® in circuit.

9. Close pressure tap screw.

22


E. Adjusting the Minimum Pressure Setting

1. Disconnect pressure feedback connection (if appcable).

2. Connect a suitable pressure gauge to pipe line or to outletpressure tap of gas control concerned, to measure burnerpressure (measuring point must be as near to burner aspossible).

3. Disconnect electrical connection of the Moduplus®.

4. Energize operator, set control in operation and wait untilan outlet pressure is recorded on pressure gauge.

5. If minimum rate pressure needs adjustment, use an 8 mmwrench to turn adjustment screw for minimum pressuresetting (clockwise to increase or counter-clockwise todecrease pressure), until the desired minimum outletpressure is obtained.

6. Check if main burner lights easily and reliable at mini-mum pressure.

7. Reconnect pressure feedback connection (if appcable).

8. Close pressure tap screw.

F. Checkout

After any adjustment, set appliance in operation andobserve through a component cycle to ensure that burnersystem components function correctly.

Gs. Maintenance

It is recommended to check yearly the minimum and themaximum setting and readjust them if necessary.

Figure 2-15. Burner Assembly

Figure 2-16. Gas Valve

Adjustment Screw (5 mm)for minimum pressure

setting

Adjustment Screw(8 mm) for maximum

pressuresetting

VI. CONVEYOR REAR STOP AND ENDSTOP INSTALLATION

Locate the conveyor rear stop and end stop in theinstallation kit. Install the rear stop and end stop at the exitend of the oven. See Figure 2-17.

MiddleMarsh

Conveyor Rear Stop

Conveyor End Stop

Figure 2-17. Installing Rear and End Stops

SECTION 3OPERATION

23

SECTION 3OPERATION

I. CONTROL FUNCTIONS

WARNINGThe burner cannot operate and gas cannot flowthrough the burner without electric power. DoNOT attempt to operate the oven during a poweroutage.

WARNINGA 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 electric power to the oven beforeattempting to clean or service this oven.

Figure 3-1. PS540-Series Oven Control Functions

24

SECTION 3OPERATION

II. COMPONENT INFORMATION ANDLOCATION (Figures 3-1 and 3-2)

A. Door Safety Switch

The Door Safety Switch is located at the lower left side ofcontrol panel opening. Opening the control panel doorpermits this switch to open, disconnecting power to allelectrical controls.

CAUTIONDo NOT touch the wires going to this safety switch.Current is always present.

B. Blower Switch

The blower switch has two positions. The switch must be“ON” or “I” for the burner to come on and permit the ovento warm up. The fan circulates the air throughout the ovenand must stay on during baking and during the cool downcycle above 200°F (93°C) to prevent blower bearingdamage. To protect the blower motor and bearings athermostatic override is built into the oven. If the tempera-ture inside the oven is over 180°F (82°C) the main blowerwill continue to run after the blower switch is turned to the“OFF” or “O” position.

An air pressure switch monitors the air flow from theblower, acting as a safety interlock for the burner. The

burner cannot light, if the air switch does not sense air flowoff the main blower fan.

C. Heat Switch

Turning the HEAT switch to “ON” or“I” will initially set upthe oven purge circuit. After approximately 30 seconds,the burner lights. After the burner is lit, a flame sensorsends a signal to the ignition module to stop the spark.The burner will run unless the flame sensor does notdetect a flame or the heat switch is turned to the “OFF”or “O” position.

The HEAT switch is in series with the burner blower motorcentrifugal switch, the high-temperature safety switch,and the blower fan air pressure switch. All three safetyswitches must be closed for gas to flow and the burner tolight.

D. Temperature Controller

The temperature controller is a solid-state, on/off type tomaintain the operator-set temperature. The temperaturecontroller continuously monitors the oven temperature andturns on the modulating solenoid valve in a gas-heatedoven. The heat is on for the time required to maintain aconstant oven temperature.

The temperature controller contains a low-limit switchwhich allows the oven to cool down to 200°F (93°C) beforeshutting off the blower. A high-limit indication (ALM 1) willappear on the display if the oven reaches 650°F (343°C).

Figure 3-2. Interior View of Machinery Compartment and Control Console

SECTION 3OPERATION

25

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 adjusted from 3min. to 30 min. bake time (conveyor speed). Refer toFigure 3-3.

Conveyor speed is measured by the amount of time ittakes for an item to go through the bake chamber of theoven.

MEASURING CONVEYOR SPEED.

See Figures 3-4 and 3-5.

To check conveyor speed, place a product item at theentrance end of baking chamber as shown. Time how longit takes for the leading edge of the item to go from theentrance end of the baking chamber to the exit end. Thisshould be the conveyor speed shown on the conveyorspeed digital control.

NOTE: In Figures 3-4 and 3-5, the oven shown is with theconveyor running right to left.

WARNING

The burner will not operate and gas will not flowthrough the burner without electric power. Noattempt should be made to operate the ovenduring power failure.

WARNING

Possibility of injury from rotating parts andelectrical shock exist in this oven.

Never disassemble or clean the oven with theblower switch or any other part of the oventurned “ON” or “I”. Turn “OFF” or “O” andlockout or tagout all electrical power to theoven before attempting to clean or servicethis oven.

Figure 3-3. Conveyor Speed Digital Control

Figure 3-4. Product at entrance end of bakingchamber – BEGINNING OF TIMING

Figure 3-5. Product at exit end of bakingchamber – END OF TIMING

26

SECTION 3OPERATION

WARNING OVEN MUST BE KEPT CLEAR OFCOMBUSTIBLES AT ALL TIMES.

III. STEP-BY-STEP OPERATION

Control Panel (On split belt ovens, two conveyor speedcontrols are mounted on the control panel.)

A. Startup Procedures

Initial Startup

Check that the full-flow gas shutoff valve is “on”.This valve is located outside the rear of the oven. SeeFigures 2-3, 2-4, and 2-5.

Daily Startup

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

2. Check to see if the cooling fan (see Figure 1-8) isoperating when the blower switch (see Figure 3-6) is turned“ON” or “I”. The cooling fans cool the control componentsand burner blower motor. The cooling fan, located at therear of the electrical control cabinet blows air into andthrough the cabinet. Air is exhausted through the front ofthe cabinet and also out the front of the oven. Refer to DailyMaintenance Section for fan intake checking procedure.

IMPORTANT NOTE

The cooling fan operates when the BLOWERswitch is turned “ON” or “I”. It must operate to keepthe control console below 140°F (60°C).

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

4. Set the temperature controller to the desired bakingtemperature. See section on bake times to determinedesired temperature.

NOTE: For complete temperature controller operationinstructions refer to Step C.

5. Turn the HEAT switch (Figure 3-6) to the “ON” or “I”position. This completes a circuit to supply electric powerto the burner. When an oven that has not been in operationfor approximately 1/2 hour is turned on, it goes through a30-second purge cycle. The burner blower motor will notoperate during the time the blower fan is purging the oven.After 30 seconds, the burner blower motor starts, whichcan be detected by feeling a slight vibration when touched.This permits the burner to light.

When in operation, the burner is either on low or high flame.Its flame-sensing electrode must be satisfied to keep thebypass and gas valves open. If for some reason thebypass flame is extinguished, the burner tries to relight for90 seconds. If the burner flame does not relight in 90seconds, the oven goes into automatic safety lockout.

To relight the oven, turn the HEAT switch to “OFF” or “O”for 5 minutes. Then, repeat the Oven Startup procedure.

6. Close front window.

7. Oven will reach a baking temperature of 600°F (315°C)in approximately 10 minutes. Allow the oven to cycle for30 minutes after it has reached desired bake temperatue.The oven is now ready for baking.

Power Failure

In case of power failure, turn off all switches; open ovenwindow and remove product. After power has beenreestablished follow normal startup procedure.

CAUTIONThe burner will not operate and gas will not flow

through the burner without electric power. Noattempt should be made to operate the oven

during power failure.

B. Shutdown Procedure

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

NOTE: The blowers will remain on until the oven tempera-ture cools down to 200°F (93°C) at which time they will stopautomatically.

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

3. Turn off the main gas supply valve.

4. Open the oven window.

SECTION 3OPERATION

27

Figure 3-6. Control Panel

28

SECTION 3OPERATION

CAUTIONIn case of power failure, turn all switches to the “OFF”("O") position, open the oven window, and removethe product. After the power has been restored,perform the normal startup procedure. IF THE OVENWAS SWITCHED OFF FOR LESS THAN 5 MINUTES,WAIT FOR AT LEAST FIVE MINUTES BEFORE RE-STARTING THE OVEN.The burner will not operate and gas will not flowthrough the burner without electric power. Noattempt should be made to operate the oven duringa power failure.

A.Daily Startup Procedure

3. Turn the "CONVEYOR"( ) switch to the“ON” ("I") position.

4. If necessary, adjust theconveyor speed settingby pressing the or pushbuttons on the con-veyor speed controller tochange the displayedbake time.

6. Turn the "HEAT" ( )switch to the "ON" ("I")position, and wait for the"HEAT ON" light to turnon.

8. (Optional) Press the Tem-perature ( ) key to showthe Actual Temperaturein the display, and waitfor the "ACTUAL TEMP"light to turn on. This al-lows you to monitor theoven temperature as itrises to the setpoint.

1. Turn the "HEAT" ( ) and"BLOWER" ( ) swit-ches to the "OFF" ("O")position. Note that theblowers will remain in op-eration until the oven hascooled to below 200°F(93°C).

II. NORMAL OPERATION - STEP-BY-STEP 7. Wait for the oven to heat to the setpoint temperature.Higher setpoint temperatures will require a longer wait.The oven can reach a temperature of 500°F (232°C) inapproximately 5 minutes.

3. Open the window to allow the oven to cool faster.

2. Make certain that thereare no products left onthe conveyor inside theoven. Turn the "CON-VEYOR" ( ) switch tothe "OFF" ("O") position.

2. Turn the "BLOWER"( ) switch to the “ON”("I") position.

• Press the Up Arrowand Down ArrowKeys as necessaryto adjust the set-point.

5. Adjust the temperaturecontroller to a desired settemperature, if neces-sary.• Press the Set Point

and Unlock keys atthe same time. Waitfor the "SET PT" lightto turn on.

B. DAILY SHUTDOWN PROCEDURE

9. Allow the oven to preheat for 10 minutes after it hasreached the set point temperature.

+

4. After the oven has cooled and the blowers have turnedto the “OFF” or “O” position, switch the circuit breaker/fusedisconnect to the “OFF” or “O” position.

+waitfor

or

waitfor

or

waitfor

1. Check that the circuit breaker/fused disconnect is in theon position. Check that the window is closed.

SECTION 3OPERATION

29

DisplayShows the Set Pointor the Actual Tem-

perature in degreesFahrenheit (F) or

Celsius (C)."SP LOCK"

LightLights when the

set point is lockedout from changes.This setting can

only be changed byservice personnel.

OVERTEMPLight

Lights when the oventemperature is

greater than 650°F(343°C). Refer toQuick Reference:

Troubleshooting inthis section.

TemperatureKey

Press this key onceto view the Actual

Temperature in theDisplay.

Unlock KeyPress this key

together with the SetPoint Key to allow the

Set Point to bechanged. Changescan only be made for

60 seconds.

Up Arrow and DownArrow Keys

Press these keys toadjust the Set Point up ordown. If the Set Point willnot change, refer to Set

Point Key and Unlock Keyin this section.

Set Point KeyPress this key

together with theUnlock Key to allowthe Set Point to be

changed.Changes can only be

made for 60 sec-onds.

Service KeyService use

only.

"ACTUAL TEMP"Light

Lights when the ActualTemperature is shown

in the display.

"SET PT"(setpoint)

LightLights when the

set point is shownin the display.

"HEAT ON"Light

Lights when theburner is inoperation.

30

SECTION 3OPERATION

IV. QUICK REFERENCE: TROUBLESHOOTING

SYMPTOM PROBLEM SOLUTION

The oven temperature ex-ceeded 650°F (343°C), andthe burner was automati-cally shut down.

• Follow the procedures under Daily Shutdown Procedures inthis section to shut down the oven. Contact your MiddlebyMarshall Authorized Service Agent to determine and correct thecause of the condition to prevent damage to the oven.

IF THESE STEPS FAIL TO RESOLVE THE PROBLEM, CONTACT YOUR LOCAL MIDDLEBY MARSHALLAUTHORIZED SERVICE AGENT. A SERVICE AGENCY DIRECTORY IS SUPPLIED WITH YOUR OVEN.

light is lit, food product isundercooked

Oven will notturn on at all

Oven shuts down shortlyafter it is turned on

appears in display,oven is not heating

Oven will not heat

Oven is operating, butlittle or no air is blowing

from air fingers

Electrical power may not bereaching the oven, or thecontrols may be set incor-rectly.

The gas burner did not lightwithin 90 seconds of turn-ing the "HEAT" ( ) Switchto the “ON” ("I") position.This automatically en-gages a safety lockoutmode.

The oven did not reach200°F (93°C) within 15 min-utes of startup, and the ovenhas stopped heating.

Controls may be set incor-rectly.

Air fingers may have beenreassembled incorrectlyafter cleaning.

• Check that the circuit breaker/fused disconnect is turned on.• Check that the "BLOWER" ( ) Switch is in the “ON” ("I")

position. The burner cannot engage until the blowers are inoperation.

• Turn the "HEAT" ( ), "BLOWER" ( ), and "CONVEYOR"( )switches to the "OFF" ("O") position.

• Wait for AT LEAST FIVE MINUTES before restarting the oven.• Repeat the Daily Startup procedure.

• Turn the "HEAT" ( ), "BLOWER" ( ), and "CONVEYOR"( )switches to the "OFF" ("O") position.

• Wait for AT LEAST FIVE MINUTES before restarting the oven.• Repeat the Daily Startup procedure.

• Check that the Set Point is correctly set.• Check that both the "BLOWER" ( ) and "HEAT" ( ) Switches

are in the “ON” ("I") position.• If the oven still will not heat,turn the "HEAT" ( ), "BLOWER"

( ), and "CONVEYOR" ( )switches to the "OFF" ("O")position.

• Wait for AT LEAST FIVE MINUTES before restarting the oven.• Repeat the Daily Startup procedure. Check that the Set Point

is above 200°F (93°C).

• Turn the oven to the “OFF” or “O” position, and allow it to cool.Disconnect electrical power to the oven.

• Refer to Section 4, Maintenance, for instructions on reassem-bling the air fingers.

• Turn the oven to the “OFF” or “O” position, and allow it to cool.Disconnect electrical power to the oven.

• Check if the conveyor is blocked by an object inside the oven.• Refer to Section 4, Maintenance, for instructions on checking

the conveyor and drive chain tension.

• Check that the set temperature and bake time settings arecorrect.

Conveyor moves with ajerky motion, or will not

move at all

Food products areovercooked orundercooked.

Conveyor may be jammedon an object in the oven, orconveyor belt or drive chaintension may be incorrect.

Controls may be set incor-rectly.

SECTION 4MAINTENANCE

31


WARNINGPossibility of injury from rotating parts and electrical

shock exist in this oven. Turn off and lockout or tagoutelectrical 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 turned on.

WARNINGBefore performing any maintenance work or cleaning,

turn main power switch off.

CAUTIONWhen cleaning do not use any abrasive cleaning

materials or water spray, wipe clean only. Never use awater hose or pressurized steam cleaning equipment

when cleaning this oven.

NOTICEIf the oven is to be removed from its installed locationfor servicing, perform the following procedure:

1. Switch off the oven and allow it to cool. Do NOTservice the oven while it is warm.

2. Shut off main manual gas valve and disconnectgas connector from oven.

3. Turn off main circuit breakers and disconnectconnector from oven.

4. Turn the adjustable legs to put weight on thecasters.

5. Move oven to desired location for servicing.

6. When servicing is complete, move oven to originallocation.

7. Adjust legs to level oven and take weight offcasters.

8. Connect electrical and gas connectors to oven.

9. Turn on manual gas valve.

10. Turn on main circuit breakers.

11. Follow normal startup instructions.

32


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. TWO COOLING FAN GRILLES AT THE REAR OFEACH OVEN CONTROL COMPARTMENT MUST BECLEANED DAILY - Clean grilles with a stiff nylon typebrush.

2. Check the air intake of the cooling fan daily. The besttime to check is right after starting the oven.

IMPORTANT NOTE

The cooling fan operates when the blower switchis turned to “ON” (“I”). It must operate to keep theelectrical control cabinet below 140°F (60°C).

WARNING

IF FAN BLADE IS NOT ROTATING, BROKEN,OR FAN ASSEMBLY IS MISSING FROM MAINBLOWER MOTOR SHAFT, DO NOT OPERATEOVEN. REPLACE COOLING FAN BLADEBEFORE OPERATING OVEN. Serious damagecould be done to the burner blower motor and/orsolid-state electrical components if oven isoperated while cooling fan is not running or ventgrille is plugged.

3. Using a stiff nylon brush clean control compartmentvent grille. Hot air from control compartment exits from thisgrille.

C. Conveyor Belt (Figure 4-2)

Everyday, just after starting the oven, stand at theunloading end of the conveyor, and with a brush, removefood particles (crumbs, etc.) clinging to the conveyor belt,brushing them into the crumb pan.

D. Crumb Pans (Figure 4-2)

Remove and clean the crumb pan at each end of the oven.Each crumb pan can be removed by sliding it out, asshown in Figure 4-2. Reinstall the crumb pans aftercleaning.

E. Window

The window can be cleaned daily while it is in place.

Figure 4-2. Conveyor Belt andCrumb Pan Cleaning

Figure 4-1. Oven Cooling Fans

Cooling Fan Grille

Vent Grille

Cooling Fan Grille


33

Figure 4-3.

II. MAINTENANCE - MONTHLY

When cleaning your Series PS540 Oven note thefollowing:

PRECAUTIONS-

1. Do not use excessive water or saturation of oveninsulation will occur.

2. Do not use a caustic oven cleaner or the aluminizedfinger manifold surfaces will be severely damaged.

When cleaning your oven, first remove all heavy debriswith a vacuum cleaner. Use a damp cloth for light cleaning.For heavier cleaning of baked on grease and carbondeposits use a non-caustic cleaner that will not react withthe aluminized finger manifold surfaces.

You can order non-caustic cleaner from your local autho-rized Middleby Marshall Parts Distributor in the quantitieslisted below:

Part # Quantity

27170-0244 Case of Quarts (6)

27170-0246 Case of Gallons (4)

A. Removing Conveyor From Oven For Cleaning

1. Remove crumb pans as shown in Figure 4-2.

2. Remove upper and lower end plugs from each end ofoven by removing the two wing screws from each end plug.

3. Remove the conveyor end stop and the conveyor rearstop (Figure 4-3).

34


4. Remove conveyor drive chain cover as shown.

5. Remove tension from drive chain by lifting and pushingthe conveyor slightly into the oven. Remove drive chainfrom conveyor drive sprocket as shown.

NOTE: The split belt conveyor assembly can only beremoved from the drive end of the oven.

6. Begin sliding conveyor out of the oven as shown.

Figure 4-7.

7. Continue sliding the conveyor completely out of theoven, fold it in half and then place it to the side for cleaning.Be careful not to bump drive sprocket while handlingconveyor or damage may result to drive shaft.

Figure 4-8.

CAUTION

Be careful not to bump the drive sprocket whilehandling the conveyor, to avoid damaging the

drive shaft.

Figure 4-4.

Figure 4-5.

Figure 4-6.


35

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 aremarked in the order shown; as viewed from the front of theoven. (The marks for an upper oven should be precededwith a “U”, example UB1, UT2, etc.)

Standard Fingers

2. Slide blank plates straight out.

Figure 4-9.

3. Remove air fingers.

NOTE: Some oven users require a custom finger arrange-ment where the quantity of air fingers may vary.

You can remove top and bottom fingers and blank platesfrom each or either end. It is highly recommended thateach finger be marked before removing so it is placed inexactly the same position when reassembled(refer to step 1).

Remove the air fingers, pull the finger at the back side - pullstraight out.

Figure 4-10.

4. With air fingers out, place them in an upright position toremove the outer plate.

5. Gently step o the lip of the finger and pull the outer plateoff.

Figure 4-11.

T1 T2 T3 T4

B1 B2 B3 B4

36


6. To remove the inner plate, pull the plate out and then up.

Figure 4-12.

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 4-13. Standard Lower Finger

Figure 4-14. Standard Upper Finger

C. Cleaning the Window

The window can be cleaned in place. If it needs a thoroughcleaning it may have to be removed.

1. Remove the window by opening the window and un-screwing the window knobs from each end.

Figure 4-15.

2. Push the window all the way inside the oven, makingsure it is clear of the frame. Now, turn the window sidewayswhile inside the oven and then remove it. This will avoidbreaking the window.

Figure 4-16.

D. Reassembly of Air Fingers

1. Air fingers are made up of one inner plate, one outerplate and the finger housing manifold. Be sure to match upthe markings (T1, T2, T3, etc.) on all the parts of the airfingers as you are reassembling.

Figure 4-17.


37

2. Reassemble the inner plate. Keep your fingers clear soyou won’t pinch them. The inner plate of a finger will onlygo in one way because of its design.

3. Replace the outer plate by placing your hands flat onthe top of the plate and pushing down. Keep your fingersclear so you won’t pinch them.

Figure 4-18.

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.

Figure 4-19.

IMPORTANT: Only M6 Fingers fit in the bottomrow. All M3 and M1 finger cover plates haveextended lips at front. This extended lip will notallow these fingers to be installed in the bottom row.

IMPORTANT: When inserting fingers the tab onthe outer plate must be in the groove as shown inFigure 4-20. There is a blocking tab on the outsideof the groove which will prevent inserting thefinger in the groove if the outer plate is movedaway from the flange of the finger manifold.

Figure 4-20.

Extended Lip

Flange ofFinger Manifold

Tab onOuter Plate

Tab onOuter Plate

38


5. Install fingers and blank plates correctly with edgesinterlocked and no space between edges.

Figure 4-21.

Top FingerIncorrect - TooMuch Space

Blank Plate

Tab on Outer Plate of FingerLocated in Groove

Top FingerIncorrect - TooMuch Space

Blank Plate


Top FingerCorrect -Edges OverlapCompletely

Blank Plate



39

E. Reinstall End Plugs

1. Reinstall lower end plug. Be sure to tighten two wingscrews on the end plug.

2. Reinstall conveyor.

3. Reinstall upper end plug. Be sure to tighten two wingscrews on the end plug.

Figure 4-22.

Figure 4-23.

40


G. 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 opening. The beltshould not lift higher that 3″ to 4″ (75mm to 102mm).

2. Adjust conveyor belt tension screws (located on leftend of oven) for the 3″ to 4″ (75mm to 102mm) deflectionas shown in Figure 4-26. If there is proper tension, proceedto “J. Attaching Drive Chain”. If belt is still too loose,continue to step 3 below.

3. If conveyor belt is still not under proper tension, anentire link must be removed. Use the following procedure“H. Conveyor Belt Link Removal” to remove a link. Ifconveyor belt is under proper tension proceed directly to“J. Attaching Drive Chain”.

Figure 4-26.

F. Conveyor Reassembly Into Oven

1. Lift conveyor and position it in oven as shown.

NOTE: Conveyor assembly may be inserted into eitherend of oven. If it is to be installed from the non-drive endof the oven the drive sprocket assembly must be removedas shown in conveyor disassembly section.

NOTE: Split belt conveyors can only be inserted from thedrive end of the oven.

Figure 4-24.

2. Reinstall the conveyor rear stop. Reinstall the con-veyor end stop.

Figure 4-25.

Middleby Marshall

Conveyor Rear Stop

Conveyor End Stop


41

H. 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 4-27.

Figure 4-27.

2. Using long nose pliers, unhook master links at left endof conveyor as shown in Figure 4-28.

Figure 4-28.

3. Remove the outside master links on the right and leftsides of the conveyor belt as shown in Figure 4-29.

Figure 4-29.

4. Unhook the link to be removed.

5. Pull up on the belt link section and remove. Do notdiscard the link removed as it may be used for makingspare master links.

NOTE: If a section of the conveyor belt is being replacedit should be done now. Remove the links that needreplacing and use the section of conveyor belt furnished inyour installation kit to replace them.

Figure 4-30.

NOTE: Before connecting the inside master links, noticethat these links have a correct position (Figure 4-31). Thelink at the right is in the correct (horns up) position forinserting into the conveyor belt. The horns facing down arein the incorrect position.

Figure 4-31.

MasterLinks

IncorrectPosition

CorrectPosition

42


I. Replacing Conveyor Belt

If a section of the conveyor belt needs replacing it can bedone with the conveyor assembly either in or out of theoven. The section of the conveyor belt furnished with theoven in the installation kit may then be used to replace asection. Follow the preceding procedure “H. Conveyor beltlink removal” which outlines the disassembly procedure.

J. 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 conveyor drivesprocket and motor sprocket.

Figure 4-35.

3. The angle plate located on the underside of the con-veyor must be against the lower end plug. This is true onboth sides of oven.

Figure 4-36.

6. Reconnect the inside master links (Figure 4-32.)

Figure 4-32.

NOTE: The outside master links have right and left sidesto them. The right edge master link has an open hookfacing you as shown in Figure 4-33. This will match up withthe outer edges of the conveyor belt. Remember this hooktravels backwards on the conveyor.

Figure 4-33.

7. Reconnect the outside master links.

8. Replace all parts removed from the oven.

Figure 4-34.

Direction of travel

Crumb PanMountingBracket

Lower End Plug


43

4. Reassemble conveyor drive chain cover and thenreassemble the bottom cover to the drive chain cover.

Install both upper end plugs.

Figure 4-37.

ConveyorD.C. Motor

Burner•Blower•Motor

Fan Motor-•Blow Out•

In This Area

III. MAINTENANCE - EVERY 3 MONTHS

WARNING

Shut OFF all electrical power and lock/tag out theswitch before attempting maintenance work.

Shut OFF gas supply to oven.

NOTE: It is recommended that the 3-month mainte-nance be performed by an authorized Middleby Marshalltechnician.

A. Cleaning the Blower/Fan Motor

To gain access to the blower/fan motor, open the controlcabinet door by removing the three screws. Clean themotor, burner blower motor, the conveyor drive motor andthe surrounding area, using either compressed air or CO

2.

Thoroughly blow out the motor compartment and ventsinside the motor (Figure 4-38). Failure to do this can causepremature failure of blower fan motor.

CAUTION

Not cleaning the blower/fan motor properly cancause premature failure.

Figure 4-38.

44


B. Electrical Terminals

Open the control cabinet door by removing the threescrews from the control cabinet door. Tighten all electricalcontrol terminal screws including the electrical contactorterminal screws as shown in Figure 4-39.

Figure 4-39.

C. Ventilation

Check that the air circulation throughout the oven is notblocked and is working properly.

D. Checking the Blower/Fan Belt

1. Check the main blower/fan belt for proper tension andwear. To gain access,loosen the six screws (Figure 4-40)of the rear shroud and lift shroud cover up and off.

2. The fan belt should deflect no less than 1″ (25mm) atthe center (Figure 4-41) and have no cracks or excessivewear.

CAUTION

Overtightening the belt will cause premature bearingfailure and possible vibration problems. A sparebelt is located inside the control compartment onthe rear wall.

3. When replacing the belt, loosen the tension adjustmentbolts (Figure 4-42) on the motor mounting bracket. Next,pull back on the motor. Retighten adjustment bolts. Do notovertighten because the fan bearings may be damaged.

Figure 4-40.

Figure 4-42.

Figure 4-41.


45

E. Blower Fan Shaft Bearing Lubrication

CAUTION

Over-greasing damages the bearing seals andaccelerates grease loss, which shortens bearinglife. Wipe off any excess grease on and aroundthe bearing. Reinstall the rear shroud to allow theoven to operate

Grease the two (2) main blower fan shaft bearings (Figure4-43), using a special grease (MM P/N 17110-0015 lithium-base, high-temperature grease). ONLY ONE STROKE ofa grease gun is required for each bearing.

Figure 4-43.

Upon completing the fan belt check (or replacement) andthe bearing lubrication, reinstall the rear shroud, fasteningit with six screws of the rear shroud.

F. Split-belt Conveyor Shaft Cleaning

It is very important that the split-belt conveyor drive andidler shafts are removed from the conveyor frame forcleaning and lubrication.

CAUTION

Use a turbine oil or light machine oil. DO NOTUSE WD40 or similar product. These oilsevaporate and cause the shafts to seize.

1. Perform the conveyor removal steps described inMonthly Maintenance, paragraph “A”. After the conveyoris removed, lay it on a flat surface.

2. Remove the two conveyor belts by disassembling theconveyor master links, as described in Monthly Mainte-nance, paragraph “H”. Then, remove the two conveyorbelts by rolling them up.

3. Remove the conveyor adjustment bolts to allow theidler brackets to swing free.

Figure 4-44.

4. Drop the idler shaft assembly clear of the frame throughthe front frame slot.

Figure 4-45.

5. Pull the front and rear shafts apart and apply oil to boththe extended shaft and the interior of the hollow shaft.Using a rag, wipe oil off parts. Repeat until shafts areclean. Apply more oil to shafts then reassemble.

Figure 4-46.

46


6. Make sure bronze washer is in between the two halves.

Figure 4-47.

7. Place the idler shaft assembly back into place andreinstall the adjustment screws.

Figure 4-48.

8. Loosen the set screw on each conveyor drive sprocketand remove sprockets.

Figure 4-49.

9. Loosen the split locking collar.

Figure 4-50.

10. Remove drive shafts by sliding to right then lifting theleft side. Follow cleaning and lubricating procedures out-lined in Steps 4-6.

Figure 4-51.

11. Reassemble conveyor drive shafts into frame, mak-ing sure nylon spacer is in place.

Figure 4-52.


47

12. Slide shaft assembly to right side, holding assemblyin place. Slide split locking collar to the left side andtighten.

13. Slide rear conveyor drive sprocket onto shaft. Tightenthe set screw of this drive sprocket until it extends into thehole of the hollow shaft. It should NOT touch the inner,solid shaft. Check to see that only the rear shaft moveswhen the sprocket is turned. If both shafts move, you havetightened the set screw too tight. Loosen the set screwuntil only the rear shaft moves when the sprocket isturning.

14. Insert adaptor bushing into remaining drive sprocketthen place onto shaft. Make sure nylon spacer is in place.Tighten set screw making sure screw goes through slot inadaptor bushing and locks onto shaft.

15. Thread conveyor belts back onto frame making surethe links will be traveling in the proper direction.

16. Follow conveyor reassembly instructions in MonthlyMaintenance Paragraph “F”.

NOTE: It is recommended that the 6 Month Maintenanceschedule be performed by a Middleby Marshall authorizedservice technician.

IV. MAINTENANCE - EVERY 6 MONTHS

A. Check brushes on D.C. conveyor motor, when worn toless than 1/10″ (2.4mm), replace the brushes.

B. Clean and inspect the burner nozzle and electrodeassembly. Also check your oven venting system.

C. Check conveyor shaft bushings and spacers. Replacethem if they are worn. See Figure 6-5, Conveyor ExplodedDrawing, items 15, 30 and 31 or Figure 6-6, Split BeltConveyor, items 19, 23, 31, 35 and 36.

Figure 4-54.

Figure 4-53.

Figure 4-55.

Figure 4-56.

IMPORTANT NOTICES:

• The installation, startup and changes requiredwhen changing from one gas type to another can beperformed only by an authorized service technician.CANADIAN REGULATIONS PROHIBITCHANGING AN OVEN’S OPERATION FROMONE GAS TO ANOTHER.

• Installation of replacement parts requiring accessto the interior of the oven is permitted only by anauthorized service technician.

• If there are any problems with the operation of theoven, the authorized service technician must becalled.

• It is suggested to obtain a service contract with amanufacturer’s authorized service technician.

48


PS540-SERIES GAS OVEN KEY SPARE PARTS (Figure 4-56)

ITEM PART NO. ENGLISH DESCRIPTION QUANTITY

1 47321 Temperature Controller 1

2 44687 Blower/Fan Motor 1

3 47797 Conveyor Drive Motor 1

4 60542 Conveyor Speed Control 1

5 33812-3 Thermocouple 1

6 60679 Assy, Valve Gas Module 1

7 50275 Burner & Motor Assembly 1

8 50239 Ignition Control Module (kit) 1

Figure 4-56. Key Spare Parts

KEY SPARE PARTS KIT

An oven can be purchased with a Key Spare Parts Kit(Figure 4-56). (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 downtime and loss ofproduction, if a failure occurs.

Replacement parts for this kit can be purchased from yourMiddleby Marshall Authorized Parts Distributor.

49

SECTION 5TROUBLESHOOTING


PROBLEM:PRODUCTS ARE OVERCOOKED

OR UNDERCOOKED

Check for correctsetting of conveyor

speed control.

Set the conveyor speedcontrol at correct setting.

Check for correctsetting on tempera-

ture controller.

Turn temperaturecontrol to correct

setting.

If products still cook incorrectly,call your Middleby Marshall

Service Agency.

Verify the foodpreparation process.

PROBLEM:OVEN DOES NOT HEAT

Check to see if both BLOWERswitch and HEAT switch are in

the “ON” or “I” position.

If oven does not heat, call yourMiddleby Marshall Service Agency.

PROBLEM:BLOWER MOTOR IS RUNNING, YET LITTLE

OR NO AIR BLOWS FROM AIR FINGERS

Air fingers reassembled incorrectly,after cleaning.

Assemble air fingers correctly, after cleaning.Refer to Section 4 procedure, or call your

Middleby Marshall Service Agency.

PROBLEM:OVEN BLOWER AND CONVEYOR OPER-

ATE, YET THE OVEN IS NOT HEATING

Start the oven again. If the oven still does notheat, call your Middleby Marshall Service Agency.

Reset the temperature controllerto a new setting (above 200°F),

after turning the BLOWER switchto off for 30 seconds.

PROBLEM:OVEN DOES NOT TURN ON WHEN ITS

SWITCHES ARE TURNED ON

Check that all electric supply switches are set tothe “ON” or “I” position. Then, start the oven.

If oven still will not start, contact your MiddlebyMarshall Service Agency.

PROBLEM:CONVEYOR WILL NOT HOLD PROPER

SPEED OR WILL NOT RUN AT ALL

Check whether the conveyor isjammed on something in oven.

Check for proper tension of conveyor drivechain and conveyor belt. Refer to Section 4 for

correct procedure.

If conveyor still does not run correctly, contactyour Middleby Marshall Service Agency.

Check that the conveyordrive sprocket is tight.


50

NOTES

51

ENG

LISH

SECTION 6PARTS LIST

SECTION 6 - PARTS LIST

52

ENGLISH

SECTION 6PARTS LIST

53

ENG

LISH

SECTION 6PARTS LIST

OVE

N P

AN

ELS,

WIN

DO

W A

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LEG

S

ITEM

QTY

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4994

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61

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72

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81

3348

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94

2125

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, 10-

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3/8

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101

3790

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MEN

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111

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172

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54

ENGLISH

SECTION 6PARTS LIST

55

ENG

LISH

SECTION 6PARTS LIST

CO

NTR

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PAN

EL

ITEM

QTY

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LIN

G F

AN

, 230

V A

C

181

4187

2TR

AN

SFO

RM

ER

, 240

V (P

)/24V

(S) 2

5VA

191

6067

1SI

GN

AL A

MPL

IFIE

R, 0

-15V

DC

201

3381

3R

FI F

ILTE

R, T

YP

E F

1780

DD

20

211

3210

8TR

AN

SFO

RM

ER

, 240

V (P

)/24V

(S) 6

5VA

221

5023

9S

PA

RK

IGN

ITIO

N M

OD

ULE

, 24V

AC

50/

60H

z

231

6054

2C

ON

VE

YO

R S

PE

ED

CO

NTR

OL

W/D

IGIT

AL

SP

EE

D D

ISP

LAY

23A

137

503

DIG

ITA

L S

PE

ED

CO

NTR

OL

(DIS

PLA

Y O

NLY

)

56

ENGLISH

SECTION 6PARTS LIST

57

ENG

LISH

SECTION 6PARTS LIST

BLO

WER

AN

D S

HR

OU

D

ITEM

QTY

.P/

NDE

SCRI

PTIO

N

11

5115

7P

ULL

EY

, 1G

RV

3.0

PD

AK

32H

21

4885

5W

ELD

ME

NT,

BR

G B

RA

CK

ET

PS

540G

322

2203

73S

CR

EW

, HH

3/8

″ - 1

6 ×

1″ S

S T

3AA/

R17

110-

0017

NE

VE

R S

EIZ

E L

UB

RIC

AN

T - U

SE

D O

N IT

EM

S 3

& 7

AP

PLI

ED

TO

TH

RE

AD

S B

EFO

RE

RE

INS

TALL

ING

430

2142

2-00

01S

PLI

T LO

CK

WA

SH

ER

3/8

″ ZP

538

2141

6-00

01FL

AT

WA

SH

ER

3/8

″ SS

62

2207

2-00

25B

EA

RIN

G, P

ILLO

W B

LOC

K 5

/8″

72

2132

6-00

02S

CR

EW

, HX

HD

GR

S 3

/8″

- 16

× 5-

1/2″

8A/

R20

0020

3S

CR

EW

,HX

W/H

D 1

0 - 3

2 ×

3/8″

ZC

91

4887

2B

AC

K W

ALL

SH

RO

UD

101

4880

3A

IR IN

LET

RIN

G

118

3590

0-01

08FA

N O

RIF

ICE

STA

ND

OFF

TU

BE

121

5064

3FA

N D

RIV

E SH

AFT

131

2165

1-00

10K

EY

, SQ

3/1

6″ ×

3/1

6″ ×

1.0

0″ S

TL

141

4886

2AX

IAL

FAN

, 14″

DIA

ME

TER

151

5111

0IN

R/O

TR B

AC

K W

ELD

ME

NT

161

2203

1-00

17S

PE

CIA

L B

US

HIN

G, 5

/8″ I

D -

3/16

″ × 3

/32″

KEY

172

3532

3C

OU

PLI

NG

, CO

LLA

R S

PLI

T 5/

8″ D

IAM

ETE

R

184

5027

1R

OLL

PIN

, PLN

5/3

2″ ×

7/1

6″

58

ENGLISH

SECTION 6PARTS LIST

59

ENG

LISH

SECTION 6PARTS LIST

CO

NVE

YOR

ITEM

QTY

.P/

NDE

SCRI

PTIO

N

11

4704

2S

ING

LE C

ON

VE

YO

R 8

0″E

XC

LUD

ES

ITE

MS

7, 8

, 9, 1

2, 3

6 &

37

21

2245

0-02

25C

ON

VEYO

R B

ELT,

1/2P

32″

× 2

04″

2.84

/11

S

31

3390

0-00

32C

ON

VE

YO

R C

HA

IN, S

S W

IRE

1 FT

41

5138

0KI

T, M

ASTE

R L

INK,

CO

NTA

INS

((1)

339

00-0

016,

(4)

3390

0-00

17,

(1)

3390

0-00

18)

51

3390

0-00

16M

AS

TER

LIN

K -

LEFT

1/2

P ×

32″

61

3390

0-00

17M

AS

TER

LIN

K -

MID

DLE

1/2

P ×

32″

71

3390

0-00

18M

AS

TER

LIN

K -

RIG

HT

1/2P

× 3

2″

84

2001

371

NU

T, K

EP

S 1

0-32

, ZP

91

5026

5C

ON

VE

YO

R C

ON

TRO

L P

ICK

UP

KIT

(NO

T S

HO

WN

)

101

4940

0-00

50R

OLL

ER

CH

AIN

AS

SE

MB

LY, S

IB

111

2215

1-00

02S

PR

OC

KE

T, #

35-1

0T-5

/8″

121

2215

1-00

03S

PR

OC

KE

T, #

35-1

5T-1

/2″

131

4940

0-00

74C

OM

PLET

E FO

LDIN

G C

ON

VEYO

R A

SSY

INC

LUD

ES IT

EMS

14, 1

5, 1

6 &

26

142

3590

0-03

98PI

VOT

PLAT

E - C

ON

VEYO

R F

RAM

E

154

2117

6-00

02LO

CK

NU

T, H

EX

SS

3/8

″-16

161

4940

0-00

72C

ON

VE

YO

R F

RA

ME

AS

SE

MB

LY - I

DLE

RIN

CLU

DE

S IT

EM

S 1

7 &

18

171

3790

0-00

71C

OM

PLET

E C

ON

VEYO

R F

RAM

EW

ELD

ME

NT

- ID

LER

181

4940

0-00

13ID

LER

SID

E A

SS

EM

BLY

- C

ON

VE

YO

RIN

CLU

DE

S IT

EM

S 1

9, 2

0, 2

1, 2

2 &

23

192

2203

4-00

03B

US

HIN

G, F

LAN

GE

3/4

″ OD

, × 5

/8″ I

D N

/D

202

3500

0-10

08S

CR

EW

, AD

J - C

ON

VE

YO

R ID

LER

212

3590

0-00

20C

ON

VE

YO

R S

HA

FT S

UP

PO

RT

BR

AC

KE

T

222

3700

0-04

13ID

LER

WE

LDM

EN

T

231

4940

0-00

14ID

LER

SH

AFT

ASSE

MBL

YIN

CLU

DE

S IT

EM

S 2

4 &

25

2412

2222

9-00

03C

ON

VE

YO

R D

RIV

E S

PR

OC

KE

T 2.

0″ O

DW

/SC

REW

251

3500

0-10

11ID

LER

SH

AFT

- C

ON

VE

YO

R

261

4940

0-00

73C

ON

VEYO

R F

RAM

E AS

SEM

BLY

- DR

IVE

INC

LUD

ES

ITE

MS

27

& 2

8

271

3790

0-00

75C

OM

PLET

E C

ON

VEYO

R F

RAM

EW

ELD

ME

NT

- DR

IVE

281

4940

0-00

11D

RIV

E S

IDE

AS

SE

MB

LY - C

ON

VE

YO

RIN

CLU

DE

S IT

EM

S 1

9, 2

1, 2

9, 3

0, 3

1 &

32

291

2201

1-00

13S

HA

FT C

OLL

AR

W/S

CR

EW

301

3500

0-10

13D

RIV

E SH

AFT

ADAP

TER

312

3500

0-10

80N

YLO

N S

PA

CE

R 3

/4″ I

D 1

-1/4

″ OD

321

4940

0-00

12D

RIV

E SH

AFT

ASSE

MBL

YIN

CLU

DE

S IT

EM

S 2

4 &

33

331

3500

0-10

12D

RIV

E S

HA

FT - C

ON

VE

YO

R

341

3500

0-11

03S

TOP

, SID

E E

ND

CO

NV

EY

OR

EX

T

351

3590

0-01

48S

TOP

, BA

CK

SID

E C

ON

VE

YO

R E

XT

362

3590

0-02

55C

RU

MB

PA

N W

/SLO

TS -

CO

NV

EY

OR

372

3590

0-03

05C

RU

MB

PA

N -

CO

NV

EY

OR

381

4779

7M

OTO

R, G

EA

R 1

/50H

P 1

350:

1

ITEM

QTY

.P/

NDE

SCRI

PTIO

N

60

ENGLISH

SECTION 6PARTS LIST

61

ENG

LISH

SECTION 6PARTS LIST

SPLI

T B

ELT

CO

NVE

YOR

ITEM

QTY

.P/

NDE

SCRI

PTIO

NIT

EMQ

TY.

P/N

DESC

RIPT

ION

11

5064

6S

PLI

T C

ON

VE

YO

R 5

0/50

80″

EX

CLU

DE

S IT

EM

S 7

, 8, 9

, 12,

36

& 3

7

21

2245

0-02

26C

ON

VE

YO

R B

ELT

, 1/2

P15

″ ×

146″

2.8

6/5

SP

31

3390

0-00

37C

ON

VE

YO

R C

HA

IN, S

S W

IRE

1 FT

41

5138

2KI

T, M

ASTE

R L

INK,

CO

NTA

INS

((1)

339

00-0

016,

(1)

3390

0-00

17,

(1)

3390

0-00

18)

51

3390

0-00

16M

AS

TER

LIN

K -

LEFT

1/2

P ×

32″

61

3390

0-00

17M

AS

TER

LIN

K -

MID

DLE

1/2

P ×

32″

71

3390

0-00

18M

AS

TER

LIN

K -

RIG

HT

1/2P

× 3

2″

84

2001

371

NU

T, K

EP

S 1

0-32

, ZP

92

5026

5C

ON

VE

YO

R C

ON

TRO

L P

ICK

UP

KIT

(NO

T S

HO

WN

)

101

4940

0-00

70R

OLL

ER

CH

AIN

AS

SE

MB

LY, S

PB

15″

111

4940

0-00

51R

OLL

ER

CH

AIN

AS

SE

MB

LY, S

PB

26-

1/2″

121

2215

9-00

03S

PR

OC

KE

T, #

25-2

0T-5

/8″

131

2215

9-00

04S

PR

OC

KE

T, #

25-3

0T-1

/2″

141

4940

0-00

92C

OM

PLET

E FO

LDIN

G C

ON

VEYO

R S

PBAS

SY IN

CLU

DES

ITEM

S 15

, 15,

16,

19

& 36

152

3590

0-03

98PI

VOT

PLAT

E - C

ON

VEYO

R F

RAM

E

164

2117

6-00

02LO

CK

NU

T, H

EX

SS

3/8

″-16

1716

2222

9-00

03C

ON

VE

YO

R D

RIV

E S

PR

OC

KE

T2.

0″ O

D W

/SC

RE

W

181

4940

0-00

93C

ON

VE

YO

R F

RA

ME

AS

SE

MB

LY - I

DLE

RIN

CLU

DES

ITEM

S 17

, 19,

20,

21,

22,

23

& 24

191

3790

0-00

71C

OM

PLET

E C

ON

VEYO

R F

RAM

EW

ELD

ME

NT

- ID

LER

202

2203

4-00

03B

US

HIN

G, F

LAN

GE

3/4

″ OD

, × 5

/8″ I

D N

/D

212

3500

0-10

08S

CR

EW

, AD

J - C

ON

VE

YO

R ID

LER

222

3590

0-00

20C

ON

VE

YO

R S

HA

FT S

UP

PO

RT

BR

AC

KE

T

232

3700

0-04

13ID

LER

WE

LDM

EN

T

241

3552

5ID

LER

SH

AFT

AS

SE

MB

LY, S

PB

INC

LUD

ES

ITE

MS

25,

26

& 2

7

252

2141

5-00

01FL

AT

WA

SH

ER

, BR

ON

ZE

261

3500

0-15

35R

EA

R C

ON

VE

YO

R ID

LER

SH

AFT

, SP

B

271

4240

0-03

54FR

ON

T C

ON

VE

YO

R ID

LER

SH

AFT

ASSE

MBL

Y, S

PB

281

4940

0-00

95C

ON

VEYO

R F

RAM

E-D

RIV

E AS

SY, S

PBIN

CLU

DE

S IT

EM

S 1

2, 1

7, 2

0, 2

2, 2

9, 3

0,31

, 32,

35

& 3

6

291

2201

1-00

14S

PLI

T-S

HA

FT C

OLL

AR

302

3500

0-10

80N

YLO

N S

PA

CE

R 3

/4″ I

D 1

-1/4

″ OD

311

3500

0-15

31N

YLO

N S

PA

CE

R

321

3552

4D

RIV

E SH

AFT

ASSE

MBL

Y, S

PBIN

CLU

DE

S IT

EM

S 2

5, 3

3 &

34

331

3590

0-00

22C

ON

N-R

EA

R C

ON

VE

YO

R D

RIV

E S

HA

FT

341

4940

0-00

18FR

ONT

CO

NVEY

OR

DRIV

E SH

AFTA

SSY,

SPB

351

3590

0-00

23B

US

HIN

G, S

PR

OC

KE

T-FR

ON

T D

RIV

E

361

3790

0-00

75C

OM

PLET

E C

ON

VEYO

R F

RAM

E-D

RIV

E W

ELD

ME

NT

371

3500

0-11

03S

TOP

, SID

E E

ND

CO

NV

EY

OR

EX

T

381

3590

0-01

48S

TOP

, BA

CK

SID

E C

ON

VE

YO

R E

XT

392

3590

0-02

55C

RU

MB

PA

N W

/SLO

TS -

CO

NV

EY

OR

402

3590

0-03

05C

RU

MB

PA

N -

CO

NV

EY

OR

412

4779

7M

OTO

R, G

EA

R 1

/50H

P 1

350:

1

62

ENGLISH

SECTION 6PARTS LIST

1

2

3

45

6

13

14

7

10

1211

9

8

63

ENG

LISH

SECTION 6PARTS LIST

GA

S B

UR

NER

AN

D P

IPIN

G A

SSEM

BLY

ITEM

QTY

.P/

NDE

SCRI

PTIO

N

11

5027

5A

SS

Y, B

UR

NE

R/B

LOW

ER

21

3693

7G

AS

KE

T, D

S-2

2 B

UR

NE

R F

LAN

GE

31

2255

0-00

06FL

AN

GE

, DS

-22

BU

RN

ER

4a1

5064

0O

RIF

ICE

, MA

IN B

UR

NE

R -

5/8

× 27

TH

D (0

.193

5″ Ø

) (N

ATU

RA

L G

AS

)

4b1

5064

1O

RIF

ICE

, MA

IN B

UR

NE

R -

5/8

× 27

TH

D (0

.120

″ Ø) (

PR

OP

AN

E G

AS

)

51

2301

5-00

04C

OU

PLI

NG

, PIP

E N

PT

1/2″

61

3000

2P

LUG

, SQ

HD

1/8

NP

T B

R

71

4874

2B

US

HIN

G, 1

/2-1

/8 N

PT

RE

DU

CE

R

81

4566

7TE

E, P

IPE

1/2

″ ×

1/2″

× 1

/2″

91

3123

8N

IPP

LE, 1

/2 ×

4 B

LK P

IPE

101

6067

9AS

SY, G

AS V

ALVE

111

2312

2-00

04E

LBO

W, 9

0° P

IPE

(150

#MI)

0.50

0

121

2315

3-00

04N

IPP

LE, C

LOS

E B

LK 1

/2

131

3700

0-07

81A

SS

Y, 1

/2″ P

IPE

CLA

MP

PS

200

141

3786

9N

IPP

LE, B

LK 1

/2 ×

3-1

/2

64

ENGLISH

SECTION 6PARTS LIST

65

ENG

LISH

SECTION 6PARTS LIST

MA

CH

INER

Y C

OM

PAR

TMEN

T

ITEM

QTY

.P/

NDE

SCRI

PTIO

N

11

2802

1-00

47IN

TER

LOC

K S

WIT

CH

10A

NO

2P

21

2802

1-00

61M

OM

EN

TAR

Y S

WIT

CH

- 10

A N

O 2

PO

LE

31

4468

7M

OTO

R 1

/2 H

P

41

4995

3M

OTO

R M

OU

NTI

NG

BR

AC

KE

T W

ELD

ME

NT

51

5044

9M

OTO

R S

UP

PO

RT

BR

AC

KE

T

68

1513

D88

05S

CR

EW

, HE

X H

D 3

/8″-

16 ×

3/4

″ - N

P

78

2142

2-00

01LO

CK

WA

SH

ER

, SP

LIT

3/8″

ZP

88

2141

6-00

01FL

AT

WA

SH

ER

SS

3/8

″

94

A38

96M

AC

HIN

E S

CR

EW

, H

EX

HD

5/1

6″-1

8 ×

1″ 1

8-8

104

3023

A88

07FL

AT

WA

SH

ER

5/1

6″ S

AE

NP

114

2112

6-00

04H

EX

NU

T S

S 5

/16-

18

124

A36

82LO

CK

WA

SH

ER

5/1

6″

131

3645

1C

OO

LIN

G F

AN

230

V A

C

141

3149

7FI

NG

ER

CO

OLI

NG

FA

N G

UA

RD

151

3381

2-3

THE

RM

OC

OU

PLE

, TY

PE

“J” S

HIE

LDE

D 9

.50

× 60

″

66

ENGLISH

SECTION 6PARTS LIST

NOTES

67

SECTION 7ELECTRICAL SCHEMATICS


Wir

ing

Dia

gra

m, G

208-

240

50/6

0, 1

PH

3W

PS

540

5014

1H


68

Wir

ing

Dia

gra

m, G

208-

240

50/6

0, 1

PH

3W

PS

540

5014

1H

69


NOTES


70

NOTES

Middleby Cooking Systems Group • 1400 Toastmaster Drive • Elgin, IL 60120 • USA • (847)741-3300 • FAX (847)741-440624-Hour Service Hotline: 1-(800)-238-8444

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 technicalservice in the industry.

WARNINGImproper 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.

NOTICEDuring the warranty period, ALL parts replacement and servicing should be performed byyour Middleby Marshall Authorized Service Agent. Service that is performed by parties

other than your Middleby Marshall Authorized Service Agent may void your warranty.

NOTICEUsing any parts other than genuine Middleby Marshall factory manufactured parts relieves

the manufacturer of all warranty and liability.

NOTICEMiddleby Marshall reserves the right to change specifications at any time.

a middleby company owner's operating · ©2003 middleby marshall inc. middleby marshall a...

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